Qt 4.8: QWidget Class Reference

Referenced by QStatusBar::event(), QScriptEdit::extraAreaPaintEvent(), QScriptEdit::extraAreaWidth(), QApplication::fontMetrics(), QStyleOption::init(), QMenuBar::initStyleOption(), QGroupBox::minimumSizeHint(), QProgressBar::minimumSizeHint(), QAbstractSpinBox::minimumSizeHint(), QLineEdit::minimumSizeHint(), QLineEdit::paintEvent(), QWorkspaceTitleBar::paintEvent(), QCommonStyle::pixelMetric(), QPlastiqueStyle::pixelMetric(), QStyleSheetStyle::pixelMetric(), qt_aqua_get_known_size(), QWhatsThat::QWhatsThat(), QStatusBar::reformat(), QExpandingLineEdit::resizeToContents(), QHeaderView::setDefaultSectionSize(), QRadioButton::sizeHint(), QCheckBox::sizeHint(), QPushButton::sizeHint(), QScrollArea::sizeHint(), QToolBoxButton::sizeHint(), QToolButton::sizeHint(), QProgressBar::sizeHint(), QAbstractScrollArea::sizeHint(), QAbstractSpinBox::sizeHint(), DetailButton::sizeHint(), QDateTimeEdit::sizeHint(), QCommonStyle::styleHint(), QWindowsStyle::styleHint(), QTabBar::tabSizeHint(), and QDockWidgetLayout::titleHeight().

QWidgetData * data

Definition: qwidget.h:815

QWidget::QFontInfo

friend class QFontInfo

Definition: qwidget.h:750

◆ fontMetrics()

QFontMetrics QWidget::fontMetrics ( ) const

inline

Returns the font metrics for the widget's current font.

Equivalent to QFontMetrics(widget->font()).

See also: font(), fontInfo(), setFont()

Definition at line 984 of file qwidget.h.

985 { return QFontMetrics(data->fnt); }

QWidgetData::fnt

QFont fnt

Definition: qwidget.h:133

QWidget::QFontMetrics

friend class QFontMetrics

Definition: qwidget.h:749

Referenced by QMdiSubWindow::changeEvent(), QWindowsVistaStyle::drawPrimitive(), QDockWidget::event(), QMdiSubWindow::eventFilter(), QSystemTrayIconSys::findIconGeometry(), fixToolBarOrientation(), QSystemTrayIconPrivate::geometry_sys(), QAccessibleDisplay::imagePosition(), QMenu::internalDelayedPopup(), QWidgetResizeHandler::keyPressEvent(), QMdiSubWindow::keyPressEvent(), QMdiSubWindowPrivate::leaveRubberBandMode(), QWorkspacePrivate::maximizeWindow(), QVistaHelper::mouseMoveEvent(), QMdiSubWindow::mousePressEvent(), QMdiSubWindow::mouseReleaseEvent(), move(), QMdiAreaPrivate::place(), QMenu::popup(), QtWndProc(), QRubberBand::resize(), resize(), setDisabled(), setGeometry(), QVistaHelper::setWindowPosHack(), QMdiAreaPrivate::showRubberBandFor(), QMdiSubWindow::showShaded(), QETWidget::translateTabletEvent(), QListView::updateGeometries(), QETWidget::updateRegion(), QMdiAreaPrivate::updateScrollBars(), and QWorkspacePrivate::updateWorkspace().

QWidgetData * data

Definition: qwidget.h:815

◆ foregroundRole()

QPalette::ColorRole QWidget::foregroundRole ( ) const

Returns the foreground role.

The foreground role defines the color from the widget's palette that is used to draw the foreground.

If no explicit foreground role is set, the function returns a role that contrasts with the background role.

See also: setForegroundRole(), backgroundRole()

Definition at line 4728 of file qwidget.cpp.

Referenced by QRenderRule::configurePalette(), QCommonStyle::drawControl(), QPainter::initFrom(), QAxClientSite::Invoke(), and QLabel::paintEvent().

 {
     Q_D(const QWidget);
     QPalette::ColorRole rl = QPalette::ColorRole(d->fg_role);
     if (rl != QPalette::NoRole)
         return rl;
     QPalette::ColorRole role = QPalette::WindowText;
     switch (backgroundRole()) {
     case QPalette::Button:
         role = QPalette::ButtonText;
         break;
     case QPalette::Base:
         role = QPalette::Text;
         break;
     case QPalette::Dark:
     case QPalette::Shadow:
         role = QPalette::Light;
         break;
     case QPalette::Highlight:
         role = QPalette::HighlightedText;
         break;
     case QPalette::ToolTipBase:
         role = QPalette::ToolTipText;
         break;
     default:
         ;
     }
     return role;
 }

◆ frameGeometry()

QRect QWidget::frameGeometry ( ) const

Referenced by QSizeGrip::mousePressEvent(), QAccessibleDockWidget::rect(), QAccessibleTitleBar::rect(), saveGeometry(), and setDisabled().

◆ frameSize()

QSize QWidget::frameSize ( ) const

Referenced by QWidgetPrivate::pointToRect(), QVistaHelper::titleBarSize(), and QVistaHelper::topPadding().

◆ geometry()

const QRect& QWidget::geometry ( ) const

◆ getContentsMargins()

void QWidget::getContentsMargins	(	int *	left,
		int *	top,
		int *	right,
		int *	bottom
	)		const

Returns the widget's contents margins for left, top, right, and bottom.

See also: setContentsMargins(), contentsRect()

Definition at line 7509 of file qwidget.cpp.

Referenced by QDockAreaLayoutItem::maximumSize(), QDockAreaLayoutItem::minimumSize(), QSplitterPrivate::setGeo(), QGraphicsProxyWidgetPrivate::setWidget_helper(), QComboBox::showPopup(), QDockWidgetLayout::sizeFromContent(), QDockAreaLayoutItem::sizeHint(), and QExpandingLineEdit::updateMinimumWidth().

 {
     Q_D(const QWidget);
     if (left)
         *left = d->leftmargin;
     if (top)
         *top = d->topmargin;
     if (right)
         *right = d->rightmargin;
     if (bottom)
         *bottom = d->bottommargin;
 }

◆ getDC()

HDC QWidget::getDC ( ) const

virtual

Returns the window system handle of the widget, for low-level access.

Using this function is not portable.

An HDC acquired with getDC() has to be released with releaseDC().

Warning: Using this function is not portable.

Reimplemented from QPaintDevice.

Definition at line 11849 of file qwidget.cpp.

Referenced by QRasterWindowSurface::flush(), and showYellowThing_win().

 {
     Q_D(const QWidget);
     if (d->hd)
         return (HDC) d->hd;
     return GetDC(winId());
 }

◆ grabGesture()

void QWidget::grabGesture	(	Qt::GestureType	gesture,
		Qt::GestureFlags	flags = `Qt::GestureFlags()`
	)

Subscribes the widget to a given gesture with specific flags.

See also: ungrabGesture(), QGestureEvent

Since: 4.6

Definition at line 12964 of file qwidget.cpp.

Referenced by QGraphicsScenePrivate::addView(), and QGraphicsView::setupViewport().

 {
     Q_D(QWidget);
     d->gestureContext.insert(gesture, flags);
     (void)QGestureManager::instance(); // create a gesture manager
 }

◆ grabKeyboard()

void QWidget::grabKeyboard ( )

Grabs the keyboard input.

This widget receives all keyboard events until releaseKeyboard() is called; other widgets get no keyboard events at all. Mouse events are not affected. Use grabMouse() if you want to grab that.

The focus widget is not affected, except that it doesn't receive any keyboard events. setFocus() moves the focus as usual, but the new focus widget receives keyboard events only after releaseKeyboard() is called.

If a different widget is currently grabbing keyboard input, that widget's grab is released first.

See also: releaseKeyboard() grabMouse() releaseMouse() focusWidget()

Definition at line 3338 of file qwidget_mac.mm.

Referenced by QWidgetResizeHandler::doMove(), QWidgetResizeHandler::doResize(), isServerProcess(), qstring_to_xtp(), qt_grab_cursor(), and QWhatsThisPrivate::say().

 {
     if(!qt_nograb()) {
         if(mac_keyboard_grabber)
             mac_keyboard_grabber->releaseKeyboard();
         mac_keyboard_grabber = this;
     }
 }

◆ grabMouse() [1/2]

void QWidget::grabMouse ( )

Grabs the mouse input.

This widget receives all mouse events until releaseMouse() is called; other widgets get no mouse events at all. Keyboard events are not affected. Use grabKeyboard() if you want to grab that.

Warning: Bugs in mouse-grabbing applications very often lock the terminal. Use this function with extreme caution, and consider using the -nograb command line option while debugging.

It is almost never necessary to grab the mouse when using Qt, as Qt grabs and releases it sensibly. In particular, Qt grabs the mouse when a mouse button is pressed and keeps it until the last button is released.

Note: Only visible widgets can grab mouse input. If isVisible() returns false for a widget, that widget cannot call grabMouse().; (Mac OS X developers) For Cocoa, calling grabMouse() on a widget only works when the mouse is inside the frame of that widget. For Carbon, it works outside the widget's frame as well, like for Windows and X11.

See also: releaseMouse() grabKeyboard() releaseKeyboard()

Definition at line 3308 of file qwidget_mac.mm.

Referenced by QX11Data::dndEnable(), QWidgetResizeHandler::doMove(), QWidgetResizeHandler::doResize(), QWidgetResizeHandler::eventFilter(), findRealWindow(), isServerProcess(), QWidgetResizeHandler::keyPressEvent(), qJournalRecordProc(), qstring_to_xtp(), and qt_grab_cursor().

 {
     if(isVisible() && !qt_nograb()) {
         if(mac_mouse_grabber)
             mac_mouse_grabber->releaseMouse();
         mac_mouse_grabber=this;
         qt_mac_setMouseGrabCursor(true);
     }
 }

◆ grabMouse() [2/2]

void QWidget::grabMouse ( const QCursor & cursor )

Definition at line 3319 of file qwidget_mac.mm.

 {
     if(isVisible() && !qt_nograb()) {
         if(mac_mouse_grabber)
             mac_mouse_grabber->releaseMouse();
         mac_mouse_grabber=this;
         qt_mac_setMouseGrabCursor(true, const_cast<QCursor *>(&cursor));
     }
 }

◆ grabShortcut()

int QWidget::grabShortcut	(	const QKeySequence &	key,
		Qt::ShortcutContext	context = `Qt::WindowShortcut`
	)

Adds a shortcut to Qt's shortcut system that watches for the given key sequence in the given context.

If the context is Qt::ApplicationShortcut, the shortcut applies to the application as a whole. Otherwise, it is either local to this widget, Qt::WidgetShortcut, or to the window itself, Qt::WindowShortcut.

If the same key sequence has been grabbed by several widgets, when the key sequence occurs a QEvent::Shortcut event is sent to all the widgets to which it applies in a non-deterministic order, but with the ``ambiguous'' flag set to true.

Warning: You should not normally need to use this function; instead create QAction with the shortcut key sequences you require (if you also want equivalent menu options and toolbar buttons), or create QShortcut if you just need key sequences. Both QAction and QShortcut handle all the event filtering for you, and provide signals which are triggered when the user triggers the key sequence, so are much easier to use than this low-level function.

See also: releaseShortcut() setShortcutEnabled()

Definition at line 11747 of file qwidget.cpp.

Referenced by QTabBar::insertTab(), QAbstractButton::setShortcut(), QTabBar::setTabText(), and QGroupBox::setTitle().

 {
     Q_ASSERT(qApp);
     if (key.isEmpty())
         return 0;
     setAttribute(Qt::WA_GrabbedShortcut);
     return qApp->d_func()->shortcutMap.addShortcut(this, key, context);
 }

◆ graphicsEffect()

QGraphicsEffect * QWidget::graphicsEffect ( ) const

The graphicsEffect function returns a pointer to the widget's graphics effect.

If the widget has no graphics effect, 0 is returned.

Since: 4.6

See also: setGraphicsEffect()

Definition at line 5484 of file qwidget.cpp.

Referenced by QWidgetPrivate::clipToEffectiveMask(), QWidgetPrivate::drawWidget(), QWidgetPrivate::invalidateGraphicsEffectsRecursively(), QWidgetPrivate::isOverlapped(), QWidgetBackingStore::markDirty(), QWidgetPrivate::subtractOpaqueSiblings(), and QWidgetPrivate::updateIsOpaque().

 {
     Q_D(const QWidget);
     return d->graphicsEffect;
 }

◆ graphicsProxyWidget()

QGraphicsProxyWidget * QWidget::graphicsProxyWidget ( ) const

Returns the proxy widget for the corresponding embedded widget in a graphics view; otherwise returns 0.

Since: 4.5

See also: QGraphicsProxyWidget::createProxyForChildWidget(), QGraphicsScene::addWidget()

Definition at line 12939 of file qwidget.cpp.

Referenced by QGraphicsProxyWidget::createProxyForChildWidget(), QApplicationPrivate::dispatchEnterLeave(), QComboBoxPrivateContainer::hideEvent(), QApplication::setActiveWindow(), QApplicationPrivate::setFocusWidget(), setParent(), and setWindowOpacity().

 {
     Q_D(const QWidget);
     if (d->extra) {
         return d->extra->proxyWidget;
     }
     return 0;
 }

◆ hasFocus()

bool QWidget::hasFocus ( ) const

Definition at line 6583 of file qwidget.cpp.

Referenced by QFileDialogPrivate::_q_autoCompleteFileName(), QFileDialogPrivate::_q_selectionChanged(), clearFocus(), QAbstractItemView::closeEditor(), QColorWell::dragLeaveEvent(), QTreeView::drawRow(), QLineEdit::event(), QX11EmbedContainer::eventFilter(), QAxHostWidget::eventFilter(), QMacStylePrivate::eventFilter(), QComboBox::hidePopup(), QStyleOption::init(), QMenuBar::initStyleOption(), QComboBox::initStyleOption(), QLineEdit::inputMethodEvent(), QGraphicsProxyWidgetPrivate::inputMethodQueryHelper(), QAbstractButton::keyPressEvent(), QAbstractItemView::keyPressEvent(), QMenuBar::leaveEvent(), make_widget_eventUPP(), QAccessibleWidget::navigate(), QWellArray::paintCell(), QListView::paintEvent(), QLineEdit::paintEvent(), QtWndProc(), resetInputContext(), QMdiSubWindowPrivate::restoreFocus(), QWorkspaceChild::setActive(), setAttribute(), QLineEdit::setCompleter(), QLineEdit::setEchoMode(), QLineEdit::setPlaceholderText(), QGraphicsView::setScene(), QDialog::setVisible(), QMdiSubWindow::showShaded(), QAccessibleWidget::state(), QAccessibleTabBar::state(), QAccessibleTitleBar::state(), QMacStylePrivate::timerEvent(), QAbstractItemView::viewOptions(), and QX11EmbedContainer::x11Event().

 {
     const QWidget* w = this;
     while (w->d_func()->extra && w->d_func()->extra->focus_proxy)
         w = w->d_func()->extra->focus_proxy;
     if (QWidget *window = w->window()) {
 #ifndef QT_NO_GRAPHICSVIEW
         QWExtra *e = window->d_func()->extra;
         if (e && e->proxyWidget && e->proxyWidget->hasFocus() && window->focusWidget() == w)
             return true;
 #endif
     }
     return (QApplication::focusWidget() == w);
 }

◆ hasMouseTracking()

bool QWidget::hasMouseTracking ( ) const

inline

Definition at line 993 of file qwidget.h.

Referenced by axc_FilterProc(), QAbstractScrollArea::event(), QApplicationPrivate::globalEventProcessor(), and QApplication::notify().

994 { return testAttribute(Qt::WA_MouseTracking); }

Qt::WA_MouseTracking

Definition: qnamespace.h:379

Referenced by QWorkspacePrivate::_q_scrollBarChanged(), QCalendarWidgetPrivate::_q_yearClicked(), QDialog::adjustPosition(), QApplicationPrivate::applyX11SpecificCommandLineArguments(), QWorkspace::cascade(), QGraphicsView::centerOn(), QAbstractSpinBox::contextMenuEvent(), QWSDisplay::defineCursor(), QColumnViewPrivate::doLayout(), QTreeView::drawRow(), QGraphicsView::ensureVisible(), QWorkspace::eventFilter(), QWorkspaceChild::eventFilter(), QWizardPrivate::findDefaultBackgroundPixmap(), QMenuBar::heightForWidth(), QTreeView::indexRowSizeHint(), QColorDialogPrivate::init(), inputMethodQuery(), QTreeViewPrivate::itemHeight(), QMenu::keyPressEvent(), QDialog::minimumSizeHint(), QProgressBar::minimumSizeHint(), QRubberBand::move(), move(), QWorkspace::paintEvent(), QMenuBar::paintEvent(), QListView::paintEvent(), QMenu::paintEvent(), QWizard::paintEvent(), QTabBar::paintEvent(), QHeaderView::paintEvent(), QWizardHeader::paintEvent(), QWizardAntiFlickerWidget::paintEvent(), QColorLuminancePicker::paintEvent(), QGLOverlayWidget::paintGL(), QMdiAreaPrivate::place(), QTipLabel::placeTip(), QtWndProc(), QAccessibleTable2::rect(), QAccessibleHeader::rect(), QAccessibleItemView::rect(), QAccessibleSlider::rect(), QAccessibleDial::rect(), QAccessibleTable2HeaderCell::rect(), QComboBoxListView::resizeEvent(), QX11EmbedContainer::resizeEvent(), QMdiSubWindow::resizeEvent(), QColorPicker::resizeEvent(), QAxHostWidget::resizeObject(), QExpandingLineEdit::resizeToContents(), QMdiAreaPrivate::resizeToMinimumTileSize(), QTableView::rowMoved(), QWhatsThisPrivate::say(), QMenuPrivate::scrollerHeight(), QProgressDialog::setBar(), QProgressDialog::setCancelButton(), QProgressDialog::setCancelButtonText(), setFixedWidth(), setGeometry(), QProgressDialog::setLabel(), QProgressDialog::setLabelText(), setMaximumSize(), setMaximumWidth(), setMinimumSize(), setMinimumWidth(), QMdiSubWindowPrivate::setSizeGrip(), QProgressDialog::setValue(), QVistaHelper::setWindowPosHack(), QDial::setWrapping(), QMdiSubWindowPrivate::showButtonsInMenuBar(), QProgressDialog::showEvent(), QWhatsThat::showEvent(), QDialog::showExtension(), QComboBox::showPopup(), QWorkspaceChild::showShaded(), QVistaBackButton::sizeHint(), QDialog::sizeHint(), QAbstractScrollArea::sizeHint(), QProgressDialog::sizeHint(), CloseButton::sizeHint(), QFileDialogListView::sizeHint(), QFileDialogTreeView::sizeHint(), QTableView::sizeHintForRow(), QAbstractItemView::sizeHintForRow(), QWorkspace::tile(), QTableView::updateGeometries(), QListView::updateGeometries(), QTreeViewPrivate::updateScrollBars(), QMessageBoxPrivate::updateSize(), QMdiAreaPrivate::updateTabBarGeometry(), QColorLuminancePicker::val2y(), QTableView::visualRegionForSelection(), QTreeView::visualRegionForSelection(), QHeaderView::visualRegionForSelection(), windowInteractsWithPosition(), and QColorLuminancePicker::y2val().

bool testAttribute(Qt::WidgetAttribute) const

Returns true if attribute attribute is set on this widget; otherwise returns false.

Definition: qwidget.h:1041

◆ height()

int QWidget::height ( ) const

inline

◆ heightForWidth()

int QWidget::heightForWidth ( int w ) const

virtual

Returns the preferred height for this widget, given the width w.

If this widget has a layout, the default implementation returns the layout's preferred height. if there is no layout, the default implementation returns -1 indicating that the preferred height does not depend on the width.

Reimplemented in QTabWidget, QLabel, QMenuBar, and QCommandLinkButton.

Definition at line 10241 of file qwidget.cpp.

Referenced by QLabel::heightForWidth(), menuBarHeightForWidth(), and QScrollAreaPrivate::updateScrollBars().

 {
     if (layout() && layout()->hasHeightForWidth())
         return layout()->totalHeightForWidth(w);
     return -1;
 }

◆ hide

void QWidget::hide ( )

inlineslot

Hides the widget.

This function is equivalent to setVisible(false).

Note: If you are working with QDialog or its subclasses and you invoke the show() function after this function, the dialog will be displayed in its original position.

See also: hideEvent(), isHidden(), show(), setVisible(), isVisible(), close()

Definition at line 501 of file qwidget.h.

Referenced by QWizardPrivate::_q_updateButtonStates(), QCalendarWidgetPrivate::_q_yearClicked(), QCalendarWidgetPrivate::_q_yearEditingFinished(), QAxClientSite::activateObject(), QAxServerBase::ActiveXProc(), QMainWindow::addDockWidget(), QMainWindowLayout::applyState(), QLineControl::complete(), QToolBarLayout::createItem(), QCalendarWidgetPrivate::createNavigationBar(), QEgl::createSurface(), QWidgetAction::deleteWidget(), QAccessibleMenu::doAction(), QAccessibleMenuBar::doAction(), QAccessibleMenuItem::doAction(), QDialog::done(), QWizardPrivate::ensureButton(), QInputDialogPrivate::ensureComboBox(), QInputDialogPrivate::ensureDoubleSpinBox(), QInputDialogPrivate::ensureIntSpinBox(), QInputDialogPrivate::ensureLineEdit(), QInputDialogPrivate::ensureListView(), event(), QFocusFrame::eventFilter(), QBalloonTip::hideBalloon(), QWorkspacePrivate::hideChild(), QStatusBar::hideOrShow(), QMdiAreaPrivate::hideRubberBand(), QTabBarPrivate::init(), QToolBox::insertItem(), QStatusBar::insertWidget(), QStackedLayout::insertWidget(), QAxServerBase::internalActivate(), QScriptDebuggerCodeFinderWidget::keyPressEvent(), QScriptNewBreakpointWidget::keyPressEvent(), QFileDialogLineEdit::keyPressEvent(), QDialogButtonBoxPrivate::layoutButtons(), QTabBarPrivate::layoutTabs(), QMdiSubWindowPrivate::leaveRubberBandMode(), QListWidgetItem::listWidget(), make_win_eventUPP(), QWorkspacePrivate::minimizeWindow(), QSplashScreen::mousePressEvent(), mousePressEvent(), QGLOverlayWidget::paintGL(), QLineControl::processKeyEvent(), QColorShower::QColorShower(), QComboBoxPrivateContainer::QComboBoxPrivateContainer(), QMainWindowLayout::QMainWindowLayout(), QScriptDebuggerCodeFinderWidget::QScriptDebuggerCodeFinderWidget(), QScriptNewBreakpointWidget::QScriptNewBreakpointWidget(), qt_mac_unregister_widget(), qt_x11_recreateWidget(), QToolBarLayout::QToolBarLayout(), QApplication::qwsProcessEvent(), QAbstractItemViewPrivate::releaseEditor(), QMdi::ControlContainer::removeButtonsFromMenuBar(), QMainWindow::removeDockWidget(), QWorkspacePrivate::removeIcon(), QMainWindow::removeToolBar(), QStatusBar::removeWidget(), QAlphaWidget::render(), QTreeViewPrivate::renderTreeToPixmapForAnimation(), QProgressDialog::reset(), QDockAreaLayoutInfo::restoreState(), QRollEffect::scroll(), QWizardPrivate::setButtonLayout(), QProgressDialog::setCancelButton(), QAbstractScrollArea::setCornerWidget(), QMenuBarPrivate::setCurrentAction(), QStackedLayout::setCurrentIndex(), QDialog::setExtension(), QToolBarLayout::setGeometry(), QMessageBox::setInformativeText(), QInputDialogPrivate::setInputWidget(), QTreeWidget::setItemHidden(), QProgressDialog::setLabel(), QMainWindow::setMenuBar(), QWizard::setPage(), setParent(), QCompleter::setPopup(), QColumnViewPrivate::setPreviewWidget(), QDeclarativeView::setRootObject(), QFocusFrame::setWidget(), QDockWidgetLayout::setWidgetForRole(), QMdi::ControlContainer::showButtonsInMenuBar(), QScriptEngineDebugger::standardWindow(), QToolBarLayout::takeAt(), QStackedLayout::takeAt(), QETWidget::translateWheelEvent(), QGLContext::updatePaintDevice(), QComboBoxPrivateContainer::updateScrollers(), QDockAreaLayout::updateSeparatorWidgets(), QDialog::~QDialog(), and ~QWidget().

501 { setVisible(false); }

QWidget::setVisible

virtual void setVisible(bool visible)

Definition: qwidget.cpp:7991

◆ hideEvent()

void QWidget::hideEvent ( QHideEvent * event )

protectedvirtual

This event handler can be reimplemented in a subclass to receive widget hide events.

The event is passed in the event parameter.

Hide events are sent to widgets immediately after they have been hidden.

Note: A widget receives spontaneous show and hide events when its mapping status is changed by the window system, e.g. a spontaneous hide event when the user minimizes the window, and a spontaneous show event when the window is restored again. After receiving a spontaneous hide event, a widget is still considered visible in the sense of isVisible().

See also: visible, event(), QHideEvent

Reimplemented in QComboBoxPrivateContainer, QComboBox, QTabBar, QComboBoxPrivateScroller, QMenu, QCalendarPopup, QAbstractSpinBox, QX11EmbedContainer, QMdiSubWindow, QWorkspace, QScrollBar, QSizeGrip, and QWSEmbedWidget.

Definition at line 9864 of file qwidget.cpp.

Referenced by QComboBox::addItems(), event(), QWidgetPrivate::hide_helper(), QSizeGrip::hideEvent(), QAbstractSpinBox::hideEvent(), and setShown().

9865 {

9866 }

◆ inputContext()

QInputContext * QWidget::inputContext ( )

This function returns the QInputContext for this widget.

By default the input context is inherited from the widgets parent. For toplevels it is inherited from QApplication.

You can override this and set a special input context for this widget by using the setInputContext() method.

See also: setInputContext()

Definition at line 474 of file qwidget.cpp.

Referenced by QLineEdit::createStandardContextMenu(), QMacInputContext::globalEventProcessor(), QBBScreenEventHandler::handleKeyboardEvent(), QApplication::notify(), qt_keyrelease_scanner(), QtWndProc(), QDeclarativeTextInputPrivate::sendMouseEventToInputContext(), setAttribute(), QWidgetPrivate::setEnabled_helper(), QGraphicsScenePrivate::setFocusItemHelper(), QApplicationPrivate::setFocusWidget(), QGraphicsItem::setInputMethodHints(), setInputMethodHints(), QComboBox::showPopup(), QWSInputContext::translateIMEvent(), updateMicroFocus(), and QApplication::x11ProcessEvent().

 {
     Q_D(QWidget);
     if (!testAttribute(Qt::WA_InputMethodEnabled))
         return 0;
 
     return d->inputContext();
 }

◆ inputMethodEvent()

void QWidget::inputMethodEvent ( QInputMethodEvent * event )

protectedvirtual

This event handler, for event event, can be reimplemented in a subclass to receive Input Method composition events.

This handler is called when the state of the input method changes.

Note that when creating custom text editing widgets, the Qt::WA_InputMethodEnabled window attribute must be set explicitly (using the setAttribute() function) in order to receive input method events.

The default implementation calls event->ignore(), which rejects the Input Method event. See the QInputMethodEvent documentation for more details.

See also: event(), QInputMethodEvent

Reimplemented in QAbstractItemView, QTextEdit, QGraphicsView, QPlainTextEdit, QComboBox, and QLineEdit.

Definition at line 9668 of file qwidget.cpp.

Referenced by QComboBox::addItems(), event(), setShown(), and QPlainTextEdit::toPlainText().

 {
     event->ignore();
 }

◆ inputMethodHints()

Qt::InputMethodHints QWidget::inputMethodHints ( ) const

Referenced by inputMethodQuery(), QLineEdit::setEchoMode(), and setShown().

◆ inputMethodQuery()

QVariant QWidget::inputMethodQuery ( Qt::InputMethodQuery query ) const

virtual

This method is only relevant for input widgets.

It is used by the input method to query a set of properties of the widget to be able to support complex input method operations as support for surrounding text and reconversions.

query specifies which property is queried.

See also: inputMethodEvent(), QInputMethodEvent, QInputContext, inputMethodHints

Reimplemented in QTextEdit, QPlainTextEdit, QComboBox, QLineEdit, QAbstractItemView, QGraphicsView, and QAbstractSpinBox.

Definition at line 9683 of file qwidget.cpp.

Referenced by QComboBox::addItems(), QBBInputContext::dispatchRequestSoftwareInputPanel(), QScrollArea::ensureWidgetVisible(), event(), QMacInputContext::globalEventProcessor(), QBBInputContext::hasSelectedText(), QAbstractItemView::inputMethodQuery(), QComboBox::inputMethodQuery(), QGraphicsProxyWidgetPrivate::inputMethodQueryHelper(), QBBInputContext::onGetCursorPosition(), QBBInputContext::onGetSelectedText(), QBBInputContext::onGetTextAfterCursor(), QBBInputContext::onGetTextBeforeCursor(), QBBInputContext::onSetComposingRegion(), qt_keyrelease_scanner(), QtWndProc(), QWinInputContext::reconvertString(), setShown(), QPlainTextEdit::toPlainText(), QWSInputContext::translateIMQueryEvent(), QWinInputContext::update(), and QXIMInputContext::update().

 {
     switch(query) {
     case Qt::ImMicroFocus:
         return QRect(width()/2, 0, 1, height());
     case Qt::ImFont:
         return font();
     case Qt::ImAnchorPosition:
         // Fallback.
         return inputMethodQuery(Qt::ImCursorPosition);
     default:
         return QVariant();
     }
 }

◆ insertAction()

void QWidget::insertAction	(	QAction *	before,
		QAction *	action
	)

Inserts the action action to this widget's list of actions, before the action before.

It appends the action if before is 0 or before is not a valid action for this widget.

A QWidget should only have one of each action.

See also: removeAction(), addAction(), QMenu, contextMenuPolicy, actions()

Definition at line 3342 of file qwidget.cpp.

Referenced by addAction(), addActions(), QAbstractSpinBox::contextMenuEvent(), QMenuBar::defaultAction(), insertActions(), QMenuBar::insertMenu(), QMenu::insertMenu(), QMenuBar::insertSeparator(), QMenu::insertSeparator(), QToolBar::insertSeparator(), QToolBar::insertWidget(), QMenu::setSeparatorsCollapsible(), and QTornOffMenu::syncWithMenu().

 {
     if(!action) {
         qWarning("QWidget::insertAction: Attempt to insert null action");
         return;
     }
 
     Q_D(QWidget);
     if(d->actions.contains(action))
         removeAction(action);
 
     int pos = d->actions.indexOf(before);
     if (pos < 0) {
         before = 0;
         pos = d->actions.size();
     }
     d->actions.insert(pos, action);
 
     QActionPrivate *apriv = action->d_func();
     apriv->widgets.append(this);
 
     QActionEvent e(QEvent::ActionAdded, action, before);
     QApplication::sendEvent(this, &e);
 }

◆ insertActions()

void QWidget::insertActions	(	QAction *	before,
		QList< QAction *>	actions
	)

Inserts the actions actions to this widget's list of actions, before the action before.

It appends the action if before is 0 or before is not a valid action for this widget.

A QWidget can have at most one of each action.

See also: removeAction(), QMenu, insertAction(), contextMenuPolicy

Definition at line 3376 of file qwidget.cpp.

 {
     for(int i = 0; i < actions.count(); ++i)
         insertAction(before, actions.at(i));
 }

◆ internalWinId()

WId QWidget::internalWinId ( ) const

inline

Returns the window system identifier of the widget, or 0 if the widget is not created yet.

Warning: This function is not part of the public interface.

Definition at line 244 of file qwidget.h.

Referenced by QX11PaintEngine::begin(), QPainter::begin(), clearFocus(), clipboardData(), create(), QWidgetPrivate::createWinId(), destroy(), do_size_hints(), QOleDropTarget::DragOver(), QWindowsVistaStyle::drawComplexControl(), effectiveWinId(), QX11EmbedContainer::embedClient(), QX11EmbedWidget::embedInto(), QClipboardWatcher::empty(), QX11EmbedWidget::event(), QX11EmbedContainer::event(), QX11Data::findClientWindow(), flipPoint(), ShivaVGWindowSurface::flush(), QVGWindowSurface::flush(), QGLWindowSurface::flush(), QClipboardWatcher::getDataInFormat(), getNetWmState(), QWidgetPrivate::hide_sys(), QWidgetPrivate::hideChildren(), QKeyMapperPrivate::isADeadKey(), QApplicationPrivate::isAlien(), QWidgetPrivate::isBackgroundInherited(), isProcessBeingDebugged(), isServerProcess(), QWidgetPrivate::mapFromGlobal(), QWidgetBackingStore::markDirtyOnScreen(), QX11Data::motifdndEnable(), QX11Data::motifdndObtainData(), QSizeGrip::mouseMoveEvent(), QX11EmbedContainerPrivate::moveInputToProxy(), nativeParentWidget(), QWidgetPrivate::paintSiblingsRecursive(), QApplicationPrivate::pickMouseReceiver(), previousInFocusChain(), qstring_to_xtp(), qt_change_net_wm_state(), qt_check_clipboard_sentinel(), qt_check_selection_sentinel(), qt_grab_cursor(), qt_insert_sip(), qt_isGenuineQWidget(), qt_mac_nativeview_for(), qt_net_remove_user_time(), qt_net_update_user_time(), qt_qpa_set_cursor(), qt_show_system_menu(), qt_try_modal(), qt_win_set_cursor(), qt_x11_enforce_cursor(), qt_x11_recreateNativeWidgetsRecursive(), qt_x11_wait_for_window_manager(), qt_xfixes_clipboard_changed(), qt_xfixes_selection_changed(), QtCeGetClipboard(), QtCeSetClipboard(), QtWndProc(), QX11EmbedContainer::QX11EmbedContainer(), QX11EmbedWidget::QX11EmbedWidget(), QWidgetBackingStoreTracker::registerWidget(), releaseDC(), QWSDisplay::selectCursor(), QApplicationPrivate::sendMouseEvent(), QApplicationPrivate::sendSyntheticEnterLeave(), setAttribute(), setFocus(), QWSInputContext::setFocusWidget(), QWidgetPrivate::setNetWmWindowTypes(), QWSDisplay::setWindowCaption(), QWidgetPrivate::show_sys(), QWhatsThat::showEvent(), QWidgetBackingStore::showYellowThing(), QWidgetBackingStore::sync(), QETWidget::translateGestureEvent(), translateKeySym(), QETWidget::translateMouseEvent(), QETWidget::translateTabletEvent(), QETWidget::translateWheelEvent(), QApplication::winFocus(), QWSWindowSurface::winId(), winId(), QWindowsXPStylePrivate::winId(), QApplication::x11ClientMessage(), QX11EmbedWidget::x11Event(), QX11EmbedContainer::x11Event(), QApplication::x11ProcessEvent(), xdndEnable(), QX11Data::xdndHandleDrop(), ~QWidget(), QX11EmbedContainer::~QX11EmbedContainer(), and QX11EmbedWidget::~QX11EmbedWidget().

244 { return data->winid; }

Referenced by QMdiSubWindowPrivate::_q_processFocusChanged(), QGestureManager::cancelGesturesForChildren(), QWidgetBackingStore::dirtyRegion(), flipPoint(), QApplicationPrivate::focusNextPrevChild_helper(), iWantTheFocus(), QWidgetBackingStore::moveStaticWidgets(), qt_cleanup(), QWidgetPrivate::reparentFocusWidgets(), QApplicationPrivate::sendSyntheticEnterLeave(), QMdiSubWindowPrivate::setActive(), QStackedLayout::setCurrentIndex(), QMdiSubWindowPrivate::setFocusWidget(), QMdiSubWindowPrivate::setMaximizeMode(), setParent(), QMdiSubWindow::showShaded(), QAccessibleMdiSubWindow::state(), QWidgetBackingStore::staticContents(), QDirectFBWindowSurface::surfaceForWidget(), and QApplicationPrivate::translateRawTouchEvent().

QWidgetData * data

Definition: qwidget.h:815

QWidgetData::winid

WId winid

Definition: qwidget.h:117

◆ isActiveWindow()

◆ isAncestorOf()

bool QWidget::isAncestorOf ( const QWidget * child ) const

Returns true if this widget is a parent, (or grandparent and so on to any level), of the given child, and both widgets are within the same window; otherwise returns false.

Definition at line 8573 of file qwidget.cpp.

 {
     while (child) {
         if (child == this)
             return true;
         if (child->isWindow())
             return false;
         child = child->parentWidget();
     }
     return false;
 }

◆ isEnabled()

bool QWidget::isEnabled ( ) const

inline

Definition at line 948 of file qwidget.h.

Referenced by QPrintDialogPrivate::_q_printerOrFileSelected(), QGroupBoxPrivate::_q_setChildrenEnabled(), QComboBox::addItems(), QAbstractButton::animateClick(), QGroupBox::changeEvent(), QAbstractButton::changeEvent(), QAbstractSpinBox::changeEvent(), QAbstractSlider::changeEvent(), QMenu::changeEvent(), QComboBox::changeEvent(), QPlainTextEdit::changeEvent(), QTextEdit::changeEvent(), QGroupBox::childEvent(), QAbstractButton::click(), QShortcutMap::correctWidgetContext(), QXIMInputContext::create_xim(), QApplicationPrivate::dispatchEnterLeave(), QAccessibleTabBar::doAction(), QGraphicsProxyWidget::dragMoveEvent(), QTreeView::drawBranches(), QWindowsXPStyle::drawComplexControl(), QCommonStyle::drawPrimitive(), QGtkStyle::drawPrimitive(), QVistaBackButton::enterEvent(), QDockWidgetTitleButton::enterEvent(), CloseButton::enterEvent(), QScrollBar::event(), QAbstractButton::event(), QMessageBox::event(), event(), QAxServerBase::eventFilter(), QGraphicsProxyWidgetPrivate::findFocusChild(), QAbstractItemView::focusNextPrevChild(), QApplicationPrivate::focusNextPrevChild_helper(), QCalendarModel::formatForCell(), QWidgetPrivate::frameStrut(), QX11EmbedWidgetPrivate::getFocusWidget(), QApplicationPrivate::giveFocusAccordingToFocusPolicy(), QApplicationPrivate::globalEventProcessor(), QStyleOption::init(), QMenuBar::initStyleOption(), QMenu::initStyleOption(), QHeaderView::initStyleOption(), QAxClientSite::Invoke(), QKeyMapperPrivate::isADeadKey(), QToolBox::isItemEnabled(), QDialog::keyPressEvent(), QVistaBackButton::leaveEvent(), QDockWidgetTitleButton::leaveEvent(), CloseButton::leaveEvent(), QAbstractButtonPrivate::moveFocus(), QApplication::notify(), QScriptDebuggerLocalsItemDelegate::paint(), QCommandLinkButton::paintEvent(), QVistaBackButton::paintEvent(), QDockWidgetTitleButton::paintEvent(), QLabel::paintEvent(), QSplitterHandle::paintEvent(), CloseButton::paintEvent(), QHeaderView::paintSection(), paintSep(), QMenuBarPrivate::popupAction(), qt_keyrelease_scanner(), qt_try_modal(), qt_x11_enforce_cursor(), QTornOffMenu::QTornOffMenu(), QtWndProc(), QKeyMapper::sendKeyEvent(), setAttribute(), setDisabledStyle(), setFocus(), QApplicationPrivate::setFocusWidget(), setForegroundRole(), setParent(), QGraphicsProxyWidgetPrivate::setWidget_helper(), QAccessibleWidget::state(), QAccessibleMdiSubWindow::state(), QAccessibleTabBar::state(), QAccessibleTitleBar::state(), QWindowsXPStyle::styleHint(), QWizardPrivate::switchToPage(), QMacStylePrivate::timerEvent(), QETWidget::translateKeyEvent(), QETWidget::translateMouseEvent(), QWinInputContext::updateImeStatus(), QGraphicsView::viewportEvent(), and QApplication::x11ProcessEvent().

949 { return !testAttribute(Qt::WA_Disabled); }

QWidgetData::window_state

bool testAttribute(Qt::WidgetAttribute) const

Returns true if attribute attribute is set on this widget; otherwise returns false.

Definition: qwidget.h:1041

Qt::WA_Disabled

Definition: qnamespace.h:377

◆ isEnabledTo()

bool QWidget::isEnabledTo ( QWidget * ancestor ) const

Returns true if this widget would become enabled if ancestor is enabled; otherwise returns false.

This is the case if neither the widget itself nor every parent up to but excluding ancestor has been explicitly disabled.

isEnabledTo(0) is equivalent to isEnabled().

See also: setEnabled() enabled

Definition at line 3290 of file qwidget.cpp.

 {
     const QWidget * w = this;
     while (!w->testAttribute(Qt::WA_ForceDisabled)
             && !w->isWindow()
             && w->parentWidget()
             && w->parentWidget() != ancestor)
         w = w->parentWidget();
     return !w->testAttribute(Qt::WA_ForceDisabled);
 }

◆ isEnabledToTLW()

bool QWidget::isEnabledToTLW ( ) const

inline

This function is deprecated.

It is equivalent to isEnabled()

Definition at line 954 of file qwidget.h.

955 { return isEnabled(); }

QWidget::isEnabled

bool isEnabled() const

Definition: qwidget.h:948

◆ isFullScreen()

bool QWidget::isFullScreen ( ) const

Definition at line 3153 of file qwidget.cpp.

Referenced by QDialog::adjustPosition(), QWidgetPrivate::hide_sys(), QMenuBarPrivate::macUpdateMenuBarImmediatly(), qt_cleanup(), restoreGeometry(), setDisabled(), QApplicationPrivate::setMaxWindowRect(), QApplicationPrivate::setScreenTransformation(), and QGLContext::updatePaintDevice().

3154 { return data->window_state & Qt::WindowFullScreen; }

Qt::WindowFullScreen

Definition: qnamespace.h:370

uint window_state

Definition: qwidget.h:120

Referenced by QMdiAreaPrivate::_q_currentTabChanged(), QWidgetPrivate::activateChildLayoutsRecursively(), QMdiAreaPrivate::activateWindow(), QLayout::addChildWidget(), QSplitterPrivate::addContribution(), QAbstractScrollArea::addScrollBarWidget(), QDockAreaLayoutInfo::apply(), QAccessibleWidget::childAt(), QAccessibleMainWindow::childAt(), QWidgetPrivate::childAtRecursiveHelper(), QSplitter::childEvent(), QWorkspace::closeAllWindows(), QMdiAreaTabBar::contextMenuEvent(), QColumnViewPrivate::createColumn(), QWidgetPrivate::createRecursively(), do_size_hints(), QSplitterPrivate::doMove(), QSplitterPrivate::doResize(), QMdiSubWindowPrivate::drawTitleBarWhenMaximized(), QToolBar::event(), QMainWindow::event(), event(), QSizeGrip::eventFilter(), QSystemTrayIconSys::findIconGeometry(), QSplitterPrivate::findWidgetJustBeforeOrJustAfter(), QStatusBar::insertPermanentWidget(), QStatusBar::insertWidget(), QSplitterPrivate::insertWidget_helper(), QMdiAreaPrivate::internalRaise(), QWorkspaceChild::internalRaise(), QTreeWidget::isItemHidden(), isVisibleTo(), QWorkspaceChild::isWindowOrIconVisible(), QToolBarLayout::layoutActions(), QListWidgetItem::listWidget(), QTabBarPrivate::makeVisible(), menuBarHeightForWidth(), QSplitter::minimumSizeHint(), QAbstractButtonPrivate::moveFocus(), QSplitter::moveSplitter(), QMdiAreaPrivate::nextVisibleSubWindow(), QTableView::paintEvent(), QWidgetPrivate::paintSiblingsRecursive(), QPlaceHolderItem::QPlaceHolderItem(), QAxServerBase::qt_metacall(), QSplitterPrivate::recalc(), QMainWindowLayout::removeFromMacToolbar(), QToolBarAreaLayout::saveState(), QListViewPrivate::selectAll(), QWidgetAction::setDefaultWidget(), setDisabled(), setFocus(), QApplicationPrivate::setFocusWidget(), QSplitterPrivate::setGeo(), QToolBarLayout::setGeometry(), QFontDialogPrivate::setVisible_sys(), QWorkspaceChild::show(), QComboBox::showPopup(), QSplitter::sizeHint(), QWorkspace::tile(), QWorkspacePrivate::updateWorkspace(), QListView::visualRegionForSelection(), and waitForPopup().

QWidgetData * data

Definition: qwidget.h:815

◆ isHidden()

bool QWidget::isHidden ( ) const

inline

Returns true if the widget is hidden, otherwise returns false.

A hidden widget will only become visible when show() is called on it. It will not be automatically shown when the parent is shown.

To check visibility, use !isVisible() instead (notice the exclamation mark).

isHidden() implies !isVisible(), but a widget can be not visible and not hidden at the same time. This is the case for widgets that are children of widgets that are not visible.

Widgets are hidden if:

they were created as independent windows,
they were created as children of visible widgets,
hide() or setVisible(false) was called.

Definition at line 1008 of file qwidget.h.

1009 { return testAttribute(Qt::WA_WState_Hidden); }

Qt::WA_WState_Hidden

Definition: qnamespace.h:393

Referenced by QMdiAreaPrivate::_q_deactivateAllWindows(), QWorkspace::addWindow(), QDialog::adjustPosition(), QMdiAreaTabBar::contextMenuEvent(), QMdiAreaPrivate::emitWindowActivated(), QMdiSubWindow::event(), QWidgetResizeHandler::eventFilter(), make_win_eventUPP(), QMdiSubWindow::maximizedButtonsWidget(), QMdiSubWindow::maximizedSystemMenuIconWidget(), QMdiSubWindow::mouseDoubleClickEvent(), QWorkspaceTitleBar::mouseMoveEvent(), QDecorationStyled::paint(), QDecorationDefault::paint(), QMdiSubWindow::paintEvent(), QMdiAreaPrivate::place(), qt_cleanup(), QApplication::qwsSetCustomColors(), QMdiAreaPrivate::rearrange(), QDecorationDefault::region(), QMdiArea::resizeEvent(), QWorkspaceChild::resizeEvent(), setDisabled(), QApplicationPrivate::setMaxWindowRect(), setMinimumSize(), QApplicationPrivate::setScreenTransformation(), QMdiAreaPrivate::setViewMode(), QMdiArea::showEvent(), showToolTip(), QWorkspacePrivate::showWindow(), QMdiAreaPrivate::updateScrollBars(), and QMdiArea::viewportEvent().

bool testAttribute(Qt::WidgetAttribute) const

Returns true if attribute attribute is set on this widget; otherwise returns false.

Definition: qwidget.h:1041

◆ isLeftToRight()

bool QWidget::isLeftToRight ( ) const

inline

Warning: This function is not part of the public interface.

Definition at line 429 of file qwidget.h.

Referenced by QMdiSubWindow::eventFilter(), QScriptEdit::extraAreaPaintEvent(), QAccessibleAbstractScrollArea::isLeftToRight(), QMdiSubWindow::keyPressEvent(), QScriptEdit::resizeEvent(), QMdiSubWindow::resizeEvent(), QMdiArea::scrollContentsBy(), QMdiSubWindow::showSystemMenu(), QScriptEdit::updateExtraAreaWidth(), and QTableView::visualRegionForSelection().

429 { return layoutDirection() == Qt::LeftToRight; }

Qt::LeftToRight

Definition: qnamespace.h:1581

QWidget::layoutDirection

Qt::LayoutDirection layoutDirection() const

◆ isMaximized()

bool QWidget::isMaximized ( ) const

Definition at line 3074 of file qwidget.cpp.

3075 { return data->window_state & Qt::WindowMaximized; }

Qt::WindowMaximized

Definition: qnamespace.h:369

QWidgetData::window_state

uint window_state

Definition: qwidget.h:120

Referenced by QMdiAreaPrivate::_q_deactivateAllWindows(), QWorkspace::addWindow(), QMdiArea::currentSubWindow(), discardSyncRequest(), QMdiSubWindow::event(), QMdiArea::eventFilter(), QFbScreen::generateRects(), QWidgetPrivate::hide_sys(), make_win_eventUPP(), QMdiSubWindow::minimumSizeHint(), QMdiSubWindow::mouseDoubleClickEvent(), QWidgetResizeHandler::mouseMoveEvent(), QMdiSubWindow::paintEvent(), QMainWindowLayout::plug(), qt_mac_get_widget_rgn(), qt_try_modal(), QtWndProc(), QMdiAreaPrivate::rearrange(), QWorkspace::setActiveWindow(), QMdiSubWindow::showEvent(), QMdiArea::showEvent(), showMinimized(), and QWorkspacePrivate::showWindow().

QWidgetData * data

Definition: qwidget.h:815

◆ isMinimized()

bool QWidget::isMinimized ( ) const

Definition at line 3027 of file qwidget.cpp.

3028 { return data->window_state & Qt::WindowMinimized; }

Qt::WindowMinimized

Definition: qnamespace.h:368

QWidgetData::window_state

uint window_state

Definition: qwidget.h:120

QWidgetData::window_modality

QWidgetData * data

Definition: qwidget.h:815

◆ isModal()

bool QWidget::isModal ( ) const

inline

Definition at line 951 of file qwidget.h.

Referenced by QDialog::closeEvent(), QApplicationPrivate::globalEventProcessor(), previousInFocusChain(), qt_event_activate_timer_callbk(), and QProgressDialog::setValue().

952 { return data->window_modality != Qt::NonModal; }

uint window_modality

Definition: qwidget.h:128

Referenced by QGraphicsView::centerOn(), QSplitterHandle::closestLegalPosition(), QWellArray::columnAt(), QWellArray::columnX(), QGridLayoutPrivate::distribute(), QTreeView::drawBranches(), QTreeView::drawRow(), QWorkspace::eventFilter(), QDateTimeEdit::focusInEvent(), QTreeView::indexRowSizeHint(), QMenuBar::keyPressEvent(), QAbstractSlider::keyPressEvent(), QMenu::keyPressEvent(), QTabWidget::keyPressEvent(), QTabBar::keyPressEvent(), QColumnViewGrip::mouseDoubleClickEvent(), QTabBar::mouseMoveEvent(), QGraphicsView::mouseMoveEvent(), QColumnView::moveCursor(), QTableView::moveCursor(), QTreeView::moveCursor(), QCalendarView::moveCursor(), QColumnViewGrip::moveGrip(), QTabBar::moveTab(), QTableView::paintEvent(), QWellArray::paintEvent(), QMenu::popup(), QAccessibleItemView::rect(), QColumnView::resizeEvent(), QDialog::resizeEvent(), QHeaderView::resizeSection(), QExpandingLineEdit::resizeToContents(), QColumnView::scrollContentsBy(), QTableView::scrollContentsBy(), QTreeView::scrollContentsBy(), QGraphicsView::scrollContentsBy(), QTextEdit::scrollContentsBy(), QColumnView::scrollTo(), QDateTimeEdit::sectionText(), QDateTimeEdit::setDisplayFormat(), QBoxLayout::setGeometry(), QHeaderView::setOffset(), QTableView::setSelection(), QListView::setSelection(), QTreeView::setSelection(), QDialog::setSizeGripEnabled(), QMdiSubWindow::showSystemMenu(), QTableView::timerEvent(), QTreeView::timerEvent(), QTableView::updateGeometries(), QTreeView::visualRect(), and QTreeView::visualRegionForSelection().

QWidgetData * data

Definition: qwidget.h:815

Qt::NonModal

Definition: qnamespace.h:1684

◆ isRightToLeft()

bool QWidget::isRightToLeft ( ) const

inline

Warning: This function is not part of the public interface.

Definition at line 428 of file qwidget.h.

428 { return layoutDirection() == Qt::RightToLeft; }

Qt::RightToLeft

Definition: qnamespace.h:1582

QWidget::layoutDirection

Qt::LayoutDirection layoutDirection() const

◆ isTopLevel()

bool QWidget::isTopLevel ( ) const

inline

Use isWindow() instead.

Definition at line 942 of file qwidget.h.

Referenced by QWindowsXPStyle::drawControl(), QSizeGrip::mouseMoveEvent(), setWindowSurface(), QCoreFuriCuri::timerEvent(), and windowSurface().

943 { return (windowType() & Qt::Window); }

Qt::Window

Definition: qnamespace.h:272

QWidget::windowType

Qt::WindowType windowType() const

Returns the window type of this widget.

Definition: qwidget.h:937

◆ isVisible()

bool QWidget::isVisible ( ) const

inline

Definition at line 1005 of file qwidget.h.

Referenced by QCompleterPrivate::_q_autoResizePopup(), QPrintDialogPrivate::_q_collapseOrExpandDialog(), QMdiAreaPrivate::_q_deactivateAllWindows(), QTextEditPrivate::_q_ensureVisible(), QFileDialogPrivate::_q_selectionChanged(), QAccessibleAbstractScrollArea::accessibleChildren(), QMenuBar::actionEvent(), QMenu::actionEvent(), QAccessibleMenu::actionText(), QAccessibleMenuBar::actionText(), QAccessibleComboBox::actionText(), QWidgetPrivate::activateChildLayoutsRecursively(), activateWindow(), QLayout::addChildWidget(), QMainWindow::addDockWidget(), QDialog::adjustPosition(), QApplication::alert(), QDockAreaLayoutInfo::apply(), QWorkspace::changeEvent(), QMdiSubWindow::changeEvent(), QMenu::changeEvent(), QAccessibleWidget::childAt(), QAccessibleItemRow::childAt(), QAccessibleTextEdit::childAt(), QAccessibleMainWindow::childAt(), QAccessibleTitleBar::childCount(), QSplitter::childEvent(), QWidgetPrivate::clipRect(), QWidgetPrivate::close_helper(), QApplication::closeAllWindows(), QDialog::closeEvent(), QTreeView::columnCountChanged(), QApplication::commitData(), QShortcutMap::correctWidgetContext(), QFileDialogPrivate::createNavServicesDialog(), QEgl::createSurface(), QAbstractItemView::currentChanged(), QAbstractItemView::dataChanged(), discardInvalidateBufferRequest(), discardSyncRequest(), QAccessibleMenu::doAction(), QAccessibleMenuBar::doAction(), QAccessibleMenuItem::doAction(), QMotifStyle::drawComplexControl(), QMotifStyle::drawControl(), QMotifStyle::drawPrimitive(), dumpRecursive(), effectiveState(), QSplitter::event(), QApplication::event(), event(), QWindowsStyle::eventFilter(), QMenuBar::eventFilter(), QMdiArea::eventFilter(), QComboBoxPrivateContainer::eventFilter(), QAxServerBase::eventFilter(), find_child(), QX11Data::findClientWindow(), findWindowThatShouldDisplayMenubar(), flipPoint(), QEventDispatcherMac::flush(), QWidgetPrivate::frameStrut(), QWidgetPrivate::getOpaqueChildren(), QApplicationPrivate::globalEventProcessor(), QWidgetPrivate::hide_sys(), QWorkspace::hideEvent(), QStatusBar::hideOrShow(), QMdiAreaPrivate::hideRubberBand(), QTreeView::indexRowSizeHint(), QSplitterPrivate::insertWidget(), QAxServerBase::internalActivate(), QWidgetPrivate::isOverlapped(), isServerProcess(), QToolTip::isVisible(), isVisibleTo(), QDialog::keyPressEvent(), QAbstractSpinBox::keyPressEvent(), make_widget_eventUPP(), make_win_eventUPP(), QWidgetBackingStore::markDirty(), QMdiSubWindow::maximizedButtonsWidget(), QMdiSubWindow::maximizedSystemMenuIconWidget(), QStatusBarPrivate::messageRect(), QMdiSubWindow::minimumSizeHint(), QListView::mouseMoveEvent(), QMenu::mouseMoveEvent(), QAccessibleTitleBar::navigate(), QStatusBar::paintEvent(), QGLOverlayWidget::paintGL(), parseGeometry(), QMainWindowLayout::plug(), QMenuPrivate::popupAction(), QWidgetPrivate::prepareToRender(), previousInFocusChain(), QLineControl::processKeyEvent(), q_createNativeChildrenAndSetParent(), QBBWindow::QBBWindow(), qstring_to_xtp(), qt_change_net_wm_state(), qt_event_activate_timer_callbk(), qt_mac_get_widget_rgn(), qt_mac_set_drawer_preferred_edge(), qt_mac_should_disable_menu(), qt_qpa_set_cursor(), qt_win_set_cursor(), qt_x11_recreateWidget(), QtWndProc(), QApplication::qwsProcessEvent(), QApplication::qwsSetCustomColors(), QMdiAreaPrivate::rearrange(), QAccessibleWidget::rect(), QAccessibleAbstractScrollArea::rect(), QAccessibleItemRow::rect(), QAccessibleItemView::rect(), QAccessibleTitleBar::rect(), removeInvisibleWidgetsFromList(), repaint(), QETWidget::repaintDecoration(), QLayoutPrivate::reparentChildWidgets(), QColumnView::resizeEvent(), QMdiSubWindow::resizeEvent(), QMdiAreaPrivate::resizeToMinimumTileSize(), QMdiSubWindowPrivate::restoreFocus(), QAbstractItemView::rowsInserted(), scroll(), QTextEdit::scrollToAnchor(), QAbstractItemView::selectionChanged(), QApplicationPrivate::sendSyntheticEnterLeave(), QGraphicsProxyWidgetPrivate::sendWidgetKeyEvent(), QGraphicsProxyWidgetPrivate::sendWidgetMouseEvent(), QApplication::setActiveWindow(), QAbstractItemView::setAlternatingRowColors(), QToolButton::setArrowType(), setAttribute(), QProgressDialog::setBar(), QProgressDialog::setCancelButton(), QProgressDialog::setCancelButtonText(), QMdiAreaPrivate::setChildActivationEnabled(), setContentsMargins(), setDisabledStyle(), QDockWidget::setFloating(), setForegroundRole(), QAbstractScrollArea::setHorizontalScrollBarPolicy(), QAbstractButton::setIconSize(), QProgressDialog::setLabel(), QProgressDialog::setLabelText(), QAbstractSpinBox::setLineEdit(), QComboBox::setLineEdit(), setMask(), QSplitter::setOrientation(), setParent(), QWidgetPrivate::setParent_sys(), QSplashScreen::setPixmap(), QDeclarativeView::setRootObject(), QGraphicsView::setScene(), QWellArray::setSelected(), QMenu::setSeparatorsCollapsible(), QStatusBar::setSizeGripEnabled(), QMenu::setTearOffEnabled(), QToolButton::setToolButtonStyle(), QTabWidget::setUpLayout(), QProgressBar::setValue(), QProgressDialog::setValue(), QAbstractScrollArea::setVerticalScrollBarPolicy(), QAbstractScrollArea::setViewport(), QDialog::setVisible(), setVisible(), QGraphicsProxyWidgetPrivate::setWidget_helper(), setWindowFlags(), QProgressDialog::showEvent(), QWorkspacePrivate::showMaximizeControls(), QErrorMessage::showMessage(), showMinimized(), QCompleterPrivate::showPopup(), QMdiSubWindow::showShaded(), QToolTip::showText(), QMacStyle::sizeFromContents(), QTableView::sizeHintForColumn(), QAccessibleMdiSubWindow::state(), QAccessibleTabBar::state(), QWidgetBackingStore::staticContents(), QWidgetPrivate::subtractOpaqueSiblings(), QDirectFBScreen::surfaceForWidget(), QWidgetBackingStore::sync(), QAbstractItemView::timerEvent(), QPlatformScreen::topLevelAt(), QStatusBarPrivate::tryToShowSizeGrip(), update(), QCalendarWidget::updateCell(), QCalendarWidget::updateCells(), QWidgetPrivate::updateGeometry_helper(), updateMicroFocus(), QGLContext::updatePaintDevice(), QComboBoxPrivateContainer::updateScrollers(), QMdiAreaPrivate::updateTabBarGeometry(), QApplication::x11ProcessEvent(), and ~QWidget().

1006 { return testAttribute(Qt::WA_WState_Visible); }

Qt::WA_WState_Visible

Definition: qnamespace.h:392

Referenced by QToolBoxPrivate::_q_widgetDestroyed(), QLayout::addChildWidget(), QAbstractScrollAreaScrollBarContainer::addWidget(), QMainWindowPrivate::adjustCursor(), QWidgetPrivate::adjustedSize(), QMainWindow::centralWidget(), QDockWidget::changeEvent(), QLayout::closestAcceptableSize(), QLayoutPrivate::createSpacerItem(), QStackedWidget::currentWidget(), dockedGeometry(), QDockWidgetItem::dockWidgetLayout(), QAccessibleTitleBar::dockWidgetLayout(), QDockWidget::event(), QTreeViewPrivate::expand(), QToolBarAreaLayoutLine::fitLayout(), QWidgetPrivate::hasHeightForWidth(), heightForWidth(), QToolBar::initStyleOption(), QMainWindowLayout::insertIntoMacToolbar(), QTreeViewPrivate::layout(), QMessageBoxPrivate::layoutMinimumWidth(), QMainWindowPrivate::mainWindowLayout(), QMainWindow::menuBar(), QMainWindow::menuWidget(), QMdiSubWindow::minimumSizeHint(), QApplicationPrivate::notify_helper(), QTextEditPrivate::paint(), QDockWidget::paintEvent(), QLabel::paintEvent(), QPlainTextEdit::paintEvent(), QAbstractScrollAreaScrollBarContainer::QAbstractScrollAreaScrollBarContainer(), QBalloonTip::QBalloonTip(), QComboBoxPrivateContainer::QComboBoxPrivateContainer(), QLayout::QLayout(), QMdiSubWindow::QMdiSubWindow(), QMessageBoxDetailsText::QMessageBoxDetailsText(), qt_mainwindow_layout(), QtWndProc(), QWizardHeader::QWizardHeader(), QAccessibleDockWidget::rect(), QAccessibleTitleBar::rect(), QToolBoxPrivate::relayout(), QTextEditPrivate::relayoutDocument(), QMainWindowLayout::removeFromMacToolbar(), QX11EmbedWidget::resizeEvent(), QAbstractScrollAreaScrollBarContainer::scrollBarLayoutIndex(), QMainWindowPrivate::separatorCursor(), QWizard::setButtonLayout(), QCalendarPopup::setCalendarWidget(), QMessageBox::setDetailedText(), QDockWidget::setFeatures(), QRasterWindowSurface::setGeometry(), QToolBar::setIconSize(), QMessageBox::setInformativeText(), QComboBoxPrivateContainer::setItemView(), setLayout(), QMainWindow::setMenuBar(), QDeclarativeView::setRootObject(), QDockWidget::setTitleBarWidget(), QWizardHeader::setup(), setVisible(), QDockWidget::setWidget(), QMdiSubWindow::setWidget(), QWidgetPrivate::show_recursive(), QMdiSubWindowPrivate::showButtonsInMenuBar(), QDialog::showExtension(), showFullScreen(), showMaximized(), showNormal(), QComboBox::showPopup(), QMainWindow::statusBar(), QCommonStyle::subElementRect(), takeLayout(), QDockWidget::titleBarWidget(), QMenuBarPrivate::updateCornerWidgetToolBar(), QWidgetPrivate::updateGeometry_helper(), QWizardPrivate::updateLayout(), QScrollAreaPrivate::updateScrollBars(), QMessageBoxPrivate::updateSize(), QComboBoxPrivateContainer::updateTopBottomMargin(), QStackedWidget::widget(), QDockWidget::widget(), and QAbstractScrollAreaScrollBarContainer::widgets().

bool testAttribute(Qt::WidgetAttribute) const

Returns true if attribute attribute is set on this widget; otherwise returns false.

Definition: qwidget.h:1041

◆ isVisibleTo()

bool QWidget::isVisibleTo ( QWidget * ancestor ) const

Returns true if this widget would become visible if ancestor is shown; otherwise returns false.

The true case occurs if neither the widget itself nor any parent up to but excluding ancestor has been explicitly hidden.

This function will still return true if the widget is obscured by other windows on the screen, but could be physically visible if it or they were to be moved.

isVisibleTo(0) is identical to isVisible().

See also: show() hide() isVisible()

Definition at line 8371 of file qwidget.cpp.

Referenced by QGroupBoxPrivate::_q_fixFocus(), QWorkspace::addWindow(), QGraphicsProxyWidgetPrivate::findFocusChild(), QApplicationPrivate::focusNextPrevChild_helper(), QX11EmbedWidgetPrivate::getFocusWidget(), QMdiAreaPrivate::place(), QAbstractScrollAreaPrivate::replaceScrollBar(), and QMacStylePrivate::timerEvent().

 {
     if (!ancestor)
         return isVisible();
     const QWidget * w = this;
     while (!w->isHidden()
             && !w->isWindow()
             && w->parentWidget()
             && w->parentWidget() != ancestor)
         w = w->parentWidget();
     return !w->isHidden();
 }

◆ isWindow()

bool QWidget::isWindow ( ) const

inline

Returns true if the widget is an independent window, otherwise returns false.

A window is a widget that isn't visually the child of any other widget and that usually has a frame and a window title.

A window can have a parent widget. It will then be grouped with its parent and deleted when the parent is deleted, minimized when the parent is minimized etc. If supported by the window manager, it will also have a common taskbar entry with its parent.

QDialog and QMainWindow widgets are by default windows, even if a parent widget is specified in the constructor. This behavior is specified by the Qt::Window flag.

See also: window(), isModal(), parentWidget()

Definition at line 945 of file qwidget.h.

946 { return (windowType() & Qt::Window); }

Qt::Window

Definition: qnamespace.h:272

QWidget::windowType

Qt::WindowType windowType() const

Returns the window type of this widget.

Definition: qwidget.h:937

◆ isWindowModified()

bool QWidget::isWindowModified ( ) const

Definition at line 11554 of file qwidget.cpp.

Referenced by QMacStyle::drawComplexControl(), QMdiSubWindow::event(), QWorkspaceChild::eventFilter(), qt_setWindowTitle_helperHelper(), QMdiSubWindow::setWidget(), and tabTextFor().

 {
     return testAttribute(Qt::WA_WindowModified);
 }

◆ keyboardGrabber()

QWidget * QWidget::keyboardGrabber ( )

static

Returns the widget that is currently grabbing the keyboard input.

If no widget in this application is currently grabbing the keyboard, 0 is returned.

See also: grabMouse(), mouseGrabber()

Definition at line 3358 of file qwidget_mac.mm.

Referenced by isServerProcess(), qstring_to_xtp(), qt_grab_cursor(), QtWndProc(), QApplication::qwsProcessEvent(), QTest::sendKeyEvent(), and QApplication::x11ProcessEvent().

 {
     return mac_keyboard_grabber;
 }

◆ keyPressEvent()

void QWidget::keyPressEvent ( QKeyEvent * event )

protectedvirtual

This event handler, for event event, can be reimplemented in a subclass to receive key press events for the widget.

A widget must call setFocusPolicy() to accept focus initially and have focus in order to receive a key press event.

If you reimplement this handler, it is very important that you call the base class implementation if you do not act upon the key.

The default implementation closes popup widgets if the user presses Esc. Otherwise the event is ignored, so that the widget's parent can interpret it.

Note that QKeyEvent starts with isAccepted() == true, so you do not need to call QKeyEvent::accept() - just do not call the base class implementation if you act upon the key.

See also: keyReleaseEvent(), setFocusPolicy(), focusInEvent(), focusOutEvent(), event(), QKeyEvent, {Tetrix Example}

Reimplemented in QCalendarView, QFileDialogTreeView, QFileDialogListView, QFileDialogLineEdit, QAbstractItemView, QMessageBox, QTextEdit, QGraphicsView, QComboBox, QPlainTextEdit, QLineEdit, QTreeView, QTabBar, QDateTimeEdit, QWhatsThat, QMenu, QTabWidget, QCalendarWidget, QWellArray, QAbstractSlider, QInputDialogDoubleSpinBox, QLabel, QAbstractSpinBox, QAbstractButton, QMenuBar, QMdiSubWindow, QAbstractScrollArea, QDialog, QTextBrowser, QScriptNewBreakpointWidget, QInputDialogSpinBox, QPushButton, QScriptDebuggerConsoleWidget, QScriptDebuggerCodeFinderWidget, and QScriptBreakpointsWidget.

Definition at line 9375 of file qwidget.cpp.

Referenced by QComboBox::addItems(), event(), QCalendarWidget::isNavigationBarVisible(), QScriptDebuggerCodeFinderWidget::keyPressEvent(), QScriptDebuggerConsoleWidget::keyPressEvent(), QScriptNewBreakpointWidget::keyPressEvent(), QCalendarWidget::keyPressEvent(), and setShown().

 {
     if ((windowType() == Qt::Popup) && event->key() == Qt::Key_Escape) {
         event->accept();
         close();
     } else {
         event->ignore();
     }
 }

◆ keyReleaseEvent()

void QWidget::keyReleaseEvent ( QKeyEvent * event )

protectedvirtual

This event handler, for event event, can be reimplemented in a subclass to receive key release events for the widget.

A widget must accept focus initially and have focus in order to receive a key release event.

If you reimplement this handler, it is very important that you call the base class implementation if you do not act upon the key.

The default implementation ignores the event, so that the widget's parent can interpret it.

Note that QKeyEvent starts with isAccepted() == true, so you do not need to call QKeyEvent::accept() - just do not call the base class implementation if you act upon the key.

See also: keyPressEvent(), QKeyEvent::ignore(), setFocusPolicy(), focusInEvent(), focusOutEvent(), event(), QKeyEvent

Reimplemented in QTextEdit, QGraphicsView, QComboBox, QPlainTextEdit, QAbstractSpinBox, and QAbstractButton.

Definition at line 9407 of file qwidget.cpp.

Referenced by QComboBox::addItems(), event(), QGraphicsView::keyReleaseEvent(), setShown(), and QPlainTextEdit::toPlainText().

 {
     event->ignore();
 }

◆ languageChange()

void QWidget::languageChange ( )

protectedvirtual

Definition at line 12005 of file qwidget.cpp.

Referenced by event().

12005 { } // compat

◆ layout()

QLayout * QWidget::layout ( ) const

Returns the layout manager that is installed on this widget, or 0 if no layout manager is installed.

The layout manager sets the geometry of the widget's children that have been added to the layout.

See also: setLayout(), sizePolicy(), {Layout Management}

Definition at line 10073 of file qwidget.cpp.

 {
     return d_func()->layout;
 }

◆ layoutDirection()

Qt::LayoutDirection QWidget::layoutDirection ( ) const

Referenced by QToolBarAreaLayout::apply(), QTreeView::drawRow(), QVistaHelper::drawTitleBar(), QScrollArea::ensureVisible(), QWizard::event(), fixToolBarOrientation(), QToolBarAreaLayout::gapIndex(), QToolBarAreaLayout::itemRect(), QAbstractScrollArea::keyPressEvent(), QLineEdit::keyPressEvent(), QVistaBackButton::paintEvent(), QLabel::paintEvent(), QMdiAreaPrivate::place(), QMainWindowLayout::setGeometry(), setLayoutDirection(), and QTabBar::tabRect().

◆ leaveEvent()

void QWidget::leaveEvent ( QEvent * event )

protectedvirtual

This event handler can be reimplemented in a subclass to receive widget leave events which are passed in the event parameter.

A leave event is sent to the widget when the mouse cursor leaves the widget.

See also: enterEvent(), mouseMoveEvent(), event()

Reimplemented in QWorkspaceChild, QMdi::ControllerWidget, QWorkspaceTitleBar, CloseButton, QComboBoxPrivateContainer, QMenu, QComboBoxPrivateScroller, QMenuBar, QDockWidgetTitleButton, QMdiSubWindow, QToolButton, QMDIControl, and QVistaBackButton.

Definition at line 9491 of file qwidget.cpp.

Referenced by event(), QMdi::ControllerWidget::hasVisibleControls(), QVistaBackButton::leaveEvent(), QToolButton::leaveEvent(), QDockWidgetTitleButton::leaveEvent(), CloseButton::leaveEvent(), and setShown().

9492 {

9493 }

◆ locale()

QLocale QWidget::locale ( ) const

Referenced by QCalendarModel::dayName(), QSpinBox::fixup(), QDoubleSpinBox::fixup(), QCalendarWidget::minimumSizeHint(), setLocale(), QWidgetPrivate::setLocale_helper(), QDateTimeEdit::textFromDateTime(), QSpinBox::textFromValue(), QDoubleSpinBox::textFromValue(), QSpinBoxPrivate::validateAndInterpret(), and QDoubleSpinBoxPrivate::validateAndInterpret().

◆ lower

void QWidget::lower ( )

slot

Lowers the widget to the bottom of the parent widget's stack.

After this call the widget will be visually behind (and therefore obscured by) any overlapping sibling widgets.

See also: raise(), stackUnder()

Definition at line 11939 of file qwidget.cpp.

Referenced by QMdiAreaPrivate::_q_deactivateAllWindows(), QDockAreaLayoutInfo::apply(), QWorkspacePrivate::insertIcon(), QStackedLayout::insertWidget(), QSplitterPrivate::insertWidget(), QAlphaWidget::render(), QRollEffect::scroll(), and QTabBar::setTabButton().

 {
     Q_D(QWidget);
     if (!isWindow()) {
         QWidget *p = parentWidget();
         const int parentChildCount = p->d_func()->children.size();
         if (parentChildCount < 2)
             return;
         const int from = p->d_func()->children.indexOf(this);
         Q_ASSERT(from >= 0);
         // Do nothing if the widget is already in correct stacking order _and_ created.
         if (from != 0)
             p->d_func()->children.move(from, 0);
         if (!testAttribute(Qt::WA_WState_Created) && p->testAttribute(Qt::WA_WState_Created))
             create();
         else if (from == 0)
             return;
     }
     if (testAttribute(Qt::WA_WState_Created))
         d->lower_sys();
 
     QEvent e(QEvent::ZOrderChange);
     QApplication::sendEvent(this, &e);
 }

◆ macCGHandle()

Qt::HANDLE QWidget::macCGHandle ( ) const

Returns the CoreGraphics handle of the widget.

Use of this function is not portable. This function will return 0 if no painter context can be established, or if the handle could not be created.

Warning: This function is only available on Mac OS X.

Definition at line 2735 of file qwidget_mac.mm.

 {
     return handle();
 }

◆ macEvent()

bool QWidget::macEvent	(	EventHandlerCallRef	caller,
		EventRef	event
	)

protectedvirtual

This special event handler can be reimplemented in a subclass to receive native Macintosh events.

The parameters are a bit different depending if Qt is build against Carbon or Cocoa. In Carbon, caller and event are the corresponding EventHandlerCallRef and EventRef that correspond to the Carbon event handlers that are installed. In Cocoa, caller is always 0 and the EventRef is the EventRef generated from the NSEvent.

In your reimplementation of this function, if you want to stop the event being handled by Qt, return true. If you return false, this native event is passed back to Qt, which translates the event into a Qt event and sends it to the widget.

Warning: This function is not portable.; This function was not called inside of Qt until Qt 4.4. If you need compatibility with earlier versions of Qt, consider QApplication::macEventFilter() instead.

See also: QApplication::macEventFilter()

Definition at line 9918 of file qwidget.cpp.

Referenced by QApplicationPrivate::globalEventProcessor(), make_widget_eventUPP(), qt_mac_sendMacEventToWidget(), and setShown().

 {
     return false;
 }

◆ macQDHandle()

Qt::HANDLE QWidget::macQDHandle ( ) const

Returns the QuickDraw handle of the widget.

Use of this function is not portable. This function will return 0 if QuickDraw is not supported, or if the handle could not be created.

Warning: This function is only available on Mac OS X.

Definition at line 2718 of file qwidget_mac.mm.

 {
 #ifndef QT_MAC_USE_COCOA
     return d_func()->qd_hd;
 #else
     return 0;
 #endif
 }

◆ mapFrom()

QPoint QWidget::mapFrom	(	QWidget *	parent,
		const QPoint &	pos
	)		const

Translates the widget coordinate pos from the coordinate system of parent to this widget's coordinate system.

The parent must not be 0 and must be a parent of the calling widget.

See also: mapTo() mapFromParent() mapFromGlobal() underMouse()

Definition at line 4433 of file qwidget.cpp.

Referenced by QMainWindow::contextMenuEvent(), QX11Data::motifdndHandle(), qt_cleanup(), and QApplicationPrivate::sendSyntheticEnterLeave().

 {
     QPoint p(pos);
     if (parent) {
         const QWidget * w = this;
         while (w != parent) {
             Q_ASSERT_X(w, "QWidget::mapFrom(QWidget *parent, const QPoint &pos)",
                        "parent must be in parent hierarchy");
 
             p = w->mapFromParent(p);
             w = w->parentWidget();
         }
     }
     return p;
 }

◆ mapFromGlobal()

QPoint QWidget::mapFromGlobal ( const QPoint & pos ) const

Translates the global screen coordinate pos to widget coordinates.

See also: mapToGlobal() mapFrom() mapFromParent()

Definition at line 3135 of file qwidget_mac.mm.

Referenced by axc_FilterProc(), QGraphicsViewPrivate::centerView(), QAccessibleWidget::childAt(), QAccessibleTable2::childAt(), QAccessibleTextEdit::childAt(), QAccessibleTree::childAt(), QAccessibleStackedWidget::childAt(), QAccessibleMainWindow::childAt(), QApplicationPrivate::dispatchEnterLeave(), QWidgetResizeHandler::doMove(), QWidgetResizeHandler::doResize(), QOleDropTarget::DragOver(), QOleDropTarget::Drop(), QDockWidget::event(), QToolBar::event(), QWidgetResizeHandler::eventFilter(), QMdiSubWindow::eventFilter(), find_child(), flipPoint(), QGraphicsScenePrivate::gestureEventHandler(), QApplicationPrivate::globalEventProcessor(), QAbstractItemView::horizontalScrollbarValueChanged(), QMainWindowLayout::hover(), QMenu::internalDelayedPopup(), isServerProcess(), QGraphicsItem::isUnderMouse(), QGraphicsScenePrivate::itemsAtPosition(), QMdiSubWindow::keyPressEvent(), QGraphicsScenePrivate::leaveScene(), mapFromGlobal(), QWidgetPrivate::mapFromGlobal(), QGestureEvent::mapToGraphicsScene(), QX11Data::motifdndHandle(), QWidgetResizeHandler::mouseMoveEvent(), QTipLabel::mouseMoveEvent(), QSplitterHandle::mouseMoveEvent(), QWorkspaceTitleBar::mouseMoveEvent(), QGraphicsItem::mouseMoveEvent(), QComboBoxPrivateContainer::mousePressEvent(), QSplitterHandle::mouseReleaseEvent(), QApplication::notify(), QAccessibleTextWidget::offsetAtPoint(), QAccessibleLineEdit::offsetAtPoint(), QWorkspaceTitleBar::paintEvent(), QApplicationPrivate::pickMouseReceiver(), q_createNativeChildrenAndSetParent(), qt_cleanup(), qt_keyrelease_scanner(), qt_mac_update_widget_position(), qt_mac_updateParentUnderAlienWidget(), qt_try_modal(), QtWndProc(), QOleDropTarget::sendDragEnterEvent(), QDeclarativeTextInputPrivate::sendMouseEventToInputContext(), QApplicationPrivate::sendSyntheticEnterLeave(), QGraphicsItem::setCursor(), QCursor::setPos(), QToolTip::showText(), QApplication::topLevelAt(), QETWidget::translateMouseEvent(), QApplicationPrivate::translateRawTouchEvent(), QETWidget::translateTabletEvent(), QETWidget::translateWheelEvent(), QETWidget::translateXinputEvent(), QGraphicsItem::unsetCursor(), QWinInputContext::update(), QGraphicsProxyWidgetPrivate::updateProxyGeometryFromWidget(), QApplicationPrivate::updateTouchPointsForWidget(), QAbstractItemView::verticalScrollbarValueChanged(), and QApplication::widgetAt().

 {
     Q_D(const QWidget);
     if (!internalWinId()) {
         QPoint p = isWindow() ?  pos : parentWidget()->mapFromGlobal(pos);
         return p - data->crect.topLeft();
     }
 #ifndef QT_MAC_USE_COCOA
     Rect win_rect;
     GetWindowBounds(qt_mac_window_for(this), kWindowStructureRgn, &win_rect);
     HIPoint hi_pos = CGPointMake(pos.x()-win_rect.left, pos.y()-win_rect.top);
     HIViewConvertPoint(&hi_pos, 0, qt_mac_nativeview_for(this));
     return d->mapFromWS(QPoint((int)hi_pos.x, (int)hi_pos.y));
 #else
     NSRect win_rect = [qt_mac_window_for(this) frame];
     // The Window point is in "Cocoa coordinates," but the view is in "Qt coordinates"
     // so make sure to keep them in sync.
     NSPoint hi_pos = NSMakePoint(pos.x()-win_rect.origin.x,
                                  flipYCoordinate(pos.y())-win_rect.origin.y);
     hi_pos = [qt_mac_nativeview_for(this) convertPoint:hi_pos fromView:0];
     return d->mapFromWS(QPoint(qRound(hi_pos.x), qRound(hi_pos.y)));
 #endif
 }

◆ mapFromParent()

QPoint QWidget::mapFromParent ( const QPoint & pos ) const

Translates the parent widget coordinate pos to widget coordinates.

Same as mapFromGlobal() if the widget has no parent.

See also: mapToParent() mapFrom() mapFromGlobal() underMouse()

Definition at line 4473 of file qwidget.cpp.

Referenced by find_child(), mapFrom(), parseGeometry(), and QApplication::qwsProcessEvent().

 {
     return pos - data->crect.topLeft();
 }

◆ mapTo()

QPoint QWidget::mapTo	(	QWidget *	parent,
		const QPoint &	pos
	)		const

Translates the widget coordinate pos to the coordinate system of parent.

The parent must not be 0 and must be a parent of the calling widget.

See also: mapFrom() mapToParent() mapToGlobal() underMouse()

Definition at line 4409 of file qwidget.cpp.

 {
     QPoint p = pos;
     if (parent) {
         const QWidget * w = this;
         while (w != parent) {
             Q_ASSERT_X(w, "QWidget::mapTo(QWidget *parent, const QPoint &pos)",
                        "parent must be in parent hierarchy");
             p = w->mapToParent(p);
             w = w->parentWidget();
         }
     }
     return p;
 }

◆ mapToGlobal()

QPoint QWidget::mapToGlobal ( const QPoint & pos ) const

Translates the widget coordinate pos to global screen coordinates.

For example, mapToGlobal(QPoint(0,0)) would give the global coordinates of the top-left pixel of the widget.

See also: mapFromGlobal() mapTo() mapToParent()

Definition at line 3108 of file qwidget_mac.mm.

 {
     Q_D(const QWidget);
     if (!internalWinId()) {
         QPoint p = pos + data->crect.topLeft();
         return isWindow() ?  p : parentWidget()->mapToGlobal(p);
     }
 #ifndef QT_MAC_USE_COCOA
     QPoint tmp = d->mapToWS(pos);
     HIPoint hi_pos = CGPointMake(tmp.x(), tmp.y());
     HIViewConvertPoint(&hi_pos, qt_mac_nativeview_for(this), 0);
     Rect win_rect;
     GetWindowBounds(qt_mac_window_for(this), kWindowStructureRgn, &win_rect);
     return QPoint((int)hi_pos.x+win_rect.left, (int)hi_pos.y+win_rect.top);
 #else
     QPoint tmp = d->mapToWS(pos);
     NSPoint hi_pos = NSMakePoint(tmp.x(), tmp.y());
     hi_pos = [qt_mac_nativeview_for(this) convertPoint:hi_pos toView:nil];
     NSRect win_rect = [qt_mac_window_for(this) frame];
     hi_pos.x += win_rect.origin.x;
     hi_pos.y += win_rect.origin.y;
     // If we aren't the desktop we need to flip, if you flip the desktop on itself, you get the other problem.
     return ((window()->windowFlags() & Qt::Desktop) == Qt::Desktop) ? QPointF(hi_pos.x, hi_pos.y).toPoint()
                                                                     : flipPoint(hi_pos).toPoint();
 #endif
 }

◆ mapToParent()

QPoint QWidget::mapToParent ( const QPoint & pos ) const

Translates the widget coordinate pos to a coordinate in the parent widget.

Same as mapToGlobal() if the widget has no parent.

See also: mapFromParent() mapTo() mapToGlobal() underMouse()

Definition at line 4459 of file qwidget.cpp.

Referenced by QVistaHelper::drawTitleBar(), handle_xdnd_position(), mapTo(), QMdiSubWindow::mouseMoveEvent(), QWorkspaceTitleBar::mouseMoveEvent(), QMdiSubWindow::mousePressEvent(), QWorkspaceTitleBar::mousePressEvent(), QApplication::notify(), and QVistaBackButton::paintEvent().

 {
     return pos + data->crect.topLeft();
 }

◆ mask()

QRegion QWidget::mask ( ) const

Returns the mask currently set on a widget.

If no mask is set the return value will be an empty region.

See also: setMask(), clearMask(), QRegion::isEmpty(), {Shaped Clock Example}

Definition at line 10058 of file qwidget.cpp.

Referenced by QSystemTrayIconSys::getSysTrayVisualInfo(), make_widget_eventUPP(), QWSMemorySurface::painterOffset(), QGraphicsView::paintEvent(), parseGeometry(), QWidgetPrivate::propagatePaletteChange(), qCanAllocColors(), qt_mac_unregister_widget(), setDisabled(), QWSWindowSurface::setGeometry(), QWSLocalMemSurface::setGeometry(), QShapedPixmapWidget::setPixmap(), showNewMessageBox(), QWidgetPrivate::subtractOpaqueSiblings(), QApplication::topLevelAt(), QRubberBandPrivate::updateMask(), QWorkspaceChild::updateMask(), QApplication::widgetAt(), and QVGEGLWindowSurfacePrivate::windowSurfaceSize().

 {
     Q_D(const QWidget);
     return d->extra ? d->extra->mask : QRegion();
 }

◆ maximumHeight()

int QWidget::maximumHeight ( ) const

Referenced by QWorkspaceChild::eventFilter(), isEnabledToTLW(), QVistaHelper::mouseMoveEvent(), QtWndProc(), and QWizardPrivate::updateMinMaxSizes().

◆ maximumSize()

QSize QWidget::maximumSize ( ) const

Referenced by QSplitterPrivate::doResize(), QWorkspaceChild::eventFilter(), fixToolBarOrientation(), QMainWindowLayout::insertIntoMacToolbar(), resize(), setDisabled(), setFixedHeight(), setFixedWidth(), setGeometry(), setMaximumHeight(), setMaximumWidth(), QDialog::showExtension(), QComboBox::showPopup(), QDockWidgetLayout::sizeFromContent(), QDialog::sizeHint(), QWorkspaceChild::sizeHint(), and QWizardPrivate::updateMinMaxSizes().

◆ maximumWidth()

int QWidget::maximumWidth ( ) const

Referenced by QWorkspaceChild::eventFilter(), isEnabledToTLW(), QPlainTextEdit::paintEvent(), QtWndProc(), and QWizardPrivate::updateMinMaxSizes().

◆ metric()

int QWidget::metric ( PaintDeviceMetric m ) const

protectedvirtual

Internal implementation of the virtual QPaintDevice::metric() function.

m is the metric to get.

Reimplemented from QPaintDevice.

Definition at line 4908 of file qwidget_mac.mm.

Referenced by do_size_hints(), effectiveState(), qt_grab_cursor(), QMainWindow::setIconSize(), QToolBar::setIconSize(), and setShown().

 {
     switch(m) {
     case PdmHeightMM:
         return qRound(metric(PdmHeight) * 25.4 / qreal(metric(PdmDpiY)));
     case PdmWidthMM:
         return qRound(metric(PdmWidth) * 25.4 / qreal(metric(PdmDpiX)));
     case PdmHeight:
     case PdmWidth:
 #ifndef QT_MAC_USE_COCOA
         { HIRect rect;
         HIViewGetFrame(qt_mac_nativeview_for(this), &rect);
         if(m == PdmWidth)
             return (int)rect.size.width;
         return (int)rect.size.height; }
 #else
         if (m == PdmWidth)
             return data->crect.width();
         else
             return data->crect.height();
 #endif
     case PdmDepth:
         return 32;
     case PdmNumColors:
         return INT_MAX;
     case PdmDpiX:
     case PdmPhysicalDpiX: {
         Q_D(const QWidget);
         if (d->extra && d->extra->customDpiX)
             return d->extra->customDpiX;
         else if (d->parent)
             return static_cast<QWidget *>(d->parent)->metric(m);
         extern float qt_mac_defaultDpi_x(); //qpaintdevice_mac.cpp
         return int(qt_mac_defaultDpi_x()); }
     case PdmDpiY:
     case PdmPhysicalDpiY: {
         Q_D(const QWidget);
         if (d->extra && d->extra->customDpiY)
             return d->extra->customDpiY;
         else if (d->parent)
             return static_cast<QWidget *>(d->parent)->metric(m);
         extern float qt_mac_defaultDpi_y(); //qpaintdevice_mac.cpp
         return int(qt_mac_defaultDpi_y()); }
     default: //leave this so the compiler complains when new ones are added
         qWarning("QWidget::metric: Unhandled parameter %d", m);
         return QPaintDevice::metric(m);
     }
     return 0;
 }

◆ minimumHeight()

int QWidget::minimumHeight ( ) const

Referenced by isEnabledToTLW(), QVistaHelper::mouseMoveEvent(), QtWndProc(), QCompleterPrivate::showPopup(), and QWizardPrivate::updateMinMaxSizes().

◆ minimumSize()

◆ minimumSizeHint()

virtual QSize QWidget::minimumSizeHint ( ) const

virtual

Reimplemented in QWorkspaceChild, QWatermarkLabel, CloseButton, QComboBox, QInputDialog, QTabBar, QLineEdit, QTabWidget, QAbstractSpinBox, QDockWidgetTitleButton, QAxHostWidget, QErrorMessageTextView, QLabel, QCalendarWidget, QX11EmbedContainer, QMenuBar, QMdiArea, QSplitter, QProgressBar, QSlider, QAbstractScrollArea, QDialog, QDial, QToolButton, QAxWidget, QMdiSubWindow, QGroupBox, QToolBoxButton, QVistaBackButton, QCommandLinkButton, QPushButton, QCheckBox, and QRadioButton.

Referenced by QComboBox::addItems(), adjustSize(), QGroupBox::minimumSizeHint(), QAxWidget::minimumSizeHint(), QDialog::minimumSizeHint(), QX11EmbedContainer::minimumSizeHint(), QAxHostWidget::minimumSizeHint(), QWatermarkLabel::minimumSizeHint(), QWorkspaceChild::minimumSizeHint(), and QScriptDebuggerCodeFinderWidget::QScriptDebuggerCodeFinderWidget().

◆ minimumWidth()

int QWidget::minimumWidth ( ) const

Referenced by QColumnViewPrivate::createColumn(), isEnabledToTLW(), QtWndProc(), QExpandingLineEdit::resizeToContents(), and QWizardPrivate::updateMinMaxSizes().

◆ mouseDoubleClickEvent()

void QWidget::mouseDoubleClickEvent ( QMouseEvent * event )

protectedvirtual

This event handler, for event event, can be reimplemented in a subclass to receive mouse double click events for the widget.

The default implementation generates a normal mouse press event.

Note: The widget will also receive mouse press and mouse release events in addition to the double click event. It is up to the developer to ensure that the application interprets these events correctly.

See also: mousePressEvent(), mouseReleaseEvent() mouseMoveEvent(), event(), QMouseEvent

Reimplemented in QCalendarView, QMdi::ControlLabel, QAbstractItemView, QTextEdit, QWorkspaceTitleBar, QGraphicsView, QPlainTextEdit, QLineEdit, QHeaderView, QTreeView, QSystemTrayIconSys, QMdiSubWindow, QAbstractScrollArea, and QColumnViewGrip.

Definition at line 9306 of file qwidget.cpp.

Referenced by event(), QMdiSubWindow::mouseDoubleClickEvent(), and setShown().

 {
     mousePressEvent(event);                        // try mouse press event
 }

◆ mouseGrabber()

QWidget * QWidget::mouseGrabber ( )

static

Returns the widget that is currently grabbing the mouse input.

If no widget in this application is currently grabbing the mouse, 0 is returned.

See also: grabMouse(), keyboardGrabber()

Definition at line 3353 of file qwidget_mac.mm.

Referenced by QX11Data::dndEnable(), effectiveState(), findRealWindow(), flipPoint(), QApplicationPrivate::globalEventProcessor(), QWidgetPrivate::hide_sys(), isServerProcess(), QApplicationPrivate::leaveModal_sys(), parseGeometry(), QApplicationPrivate::pickMouseReceiver(), qstring_to_xtp(), qt_grab_cursor(), QtWndProc(), QApplication::qwsProcessEvent(), QApplicationPrivate::sendMouseEvent(), QApplicationPrivate::sendSyntheticEnterLeave(), QCursor::setPos(), QWidgetPrivate::show_sys(), QETWidget::translateMouseEvent(), QApplication::x11EventFilter(), and QApplication::x11ProcessEvent().

 {
     return mac_mouse_grabber;
 }

◆ mouseMoveEvent()

void QWidget::mouseMoveEvent ( QMouseEvent * event )

protectedvirtual

This event handler, for event event, can be reimplemented in a subclass to receive mouse move events for the widget.

If mouse tracking is switched off, mouse move events only occur if a mouse button is pressed while the mouse is being moved. If mouse tracking is switched on, mouse move events occur even if no mouse button is pressed.

QMouseEvent::pos() reports the position of the mouse cursor, relative to this widget. For press and release events, the position is usually the same as the position of the last mouse move event, but it might be different if the user's hand shakes. This is a feature of the underlying window system, not Qt.

If you want to show a tooltip immediately, while the mouse is moving (e.g., to get the mouse coordinates with QMouseEvent::pos() and show them as a tooltip), you must first enable mouse tracking as described above. Then, to ensure that the tooltip is updated immediately, you must call QToolTip::showText() instead of setToolTip() in your implementation of mouseMoveEvent().

See also: setMouseTracking(), mousePressEvent(), mouseReleaseEvent(), mouseDoubleClickEvent(), event(), QMouseEvent, {Scribble Example}

Reimplemented in QColorShowLabel, QCalendarView, QColorLuminancePicker, QColorPicker, QMdi::ControllerWidget, QColorWell, QAbstractItemView, QTextEdit, QWorkspaceTitleBar, QGraphicsView, QPlainTextEdit, QLineEdit, QHeaderView, QTreeView, QTabBar, QComboBoxPrivateScroller, QSplitterHandle, QMenu, QWhatsThat, QListView, QAbstractSpinBox, QTipLabel, QLabel, QAbstractButton, QMenuBar, QMdiSubWindow, QTextBrowser, QAbstractScrollArea, QSlider, QGroupBox, QMDIControl, QDial, QCheckBox, QColumnViewGrip, QScriptEditExtraArea, QScrollBar, QRadioButton, QSizeGrip, and QmlJSDebugger::ToolBarColorBox.

Definition at line 9239 of file qwidget.cpp.

Referenced by event(), QMdi::ControllerWidget::hasVisibleControls(), QSizeGrip::mouseMoveEvent(), QMdiSubWindow::mouseMoveEvent(), QColorWell::mouseMoveEvent(), QColorWell::QColorWell(), and setShown().

 {
     event->ignore();
 }

◆ mousePressEvent()

void QWidget::mousePressEvent ( QMouseEvent * event )

protectedvirtual

This event handler, for event event, can be reimplemented in a subclass to receive mouse press events for the widget.

If you create new widgets in the mousePressEvent() the mouseReleaseEvent() may not end up where you expect, depending on the underlying window system (or X11 window manager), the widgets' location and maybe more.

The default implementation implements the closing of popup widgets when you click outside the window. For other widget types it does nothing.

See also: mouseReleaseEvent(), mouseDoubleClickEvent(), mouseMoveEvent(), event(), QMouseEvent, {Scribble Example}

Reimplemented in QColorShowLabel, QCalendarView, QColorLuminancePicker, QColorPicker, QMdiAreaTabBar, QMdi::ControllerWidget, QColorWell, QMdi::ControlLabel, QAbstractItemView, QTextEdit, QWorkspaceTitleBar, QGraphicsView, QComboBox, QComboBoxPrivateContainer, QPlainTextEdit, QLineEdit, QHeaderView, QTreeView, QTabBar, QDateTimeEdit, QSplitterHandle, QCalendarPopup, QSystemTrayIconSys, QMenu, QWhatsThat, QInputDialogDoubleSpinBox, QCalendarWidget, QWellArray, QAbstractSpinBox, QLabel, QAbstractButton, QMenuBar, QMdiSubWindow, QInputDialogSpinBox, QBalloonTip, QTextBrowser, QToolButton, QAbstractScrollArea, QSlider, QGroupBox, QMDIControl, QDial, QSplashScreen, QColumnViewGrip, QScriptEditExtraArea, QScrollBar, QSizeGrip, and QmlJSDebugger::ToolBarColorBox.

Definition at line 9261 of file qwidget.cpp.

Referenced by QComboBox::addItems(), event(), QCalendarWidget::isNavigationBarVisible(), mouseDoubleClickEvent(), QSizeGrip::mousePressEvent(), QMdiSubWindow::mousePressEvent(), QCalendarWidget::mousePressEvent(), QCalendarPopup::mousePressEvent(), QComboBox::mousePressEvent(), and setShown().

 {
     event->ignore();
     if ((windowType() == Qt::Popup)) {
         event->accept();
         QWidget* w;
         while ((w = QApplication::activePopupWidget()) && w != this){
             w->close();
             if (QApplication::activePopupWidget() == w) // widget does not want to disappear
                 w->hide(); // hide at least
         }
         if (!rect().contains(event->pos())){
             close();
         }
     }
 }

◆ mouseReleaseEvent()

void QWidget::mouseReleaseEvent ( QMouseEvent * event )

protectedvirtual

This event handler, for event event, can be reimplemented in a subclass to receive mouse release events for the widget.

See also: mousePressEvent(), mouseDoubleClickEvent(), mouseMoveEvent(), event(), QMouseEvent, {Scribble Example}

Reimplemented in QColorShowLabel, QCalendarView, QMdi::ControllerWidget, QColorWell, QMdi::ControlLabel, QAbstractItemView, QTextEdit, QWorkspaceTitleBar, QGraphicsView, QComboBox, QComboBoxPrivateContainer, QPlainTextEdit, QLineEdit, QHeaderView, QTreeView, QTabBar, QSplitterHandle, QCalendarPopup, QMenu, QWhatsThat, QListView, QWellArray, QAbstractSpinBox, QLabel, QAbstractButton, QMenuBar, QMdiSubWindow, QTextBrowser, QToolButton, QAbstractScrollArea, QSlider, QGroupBox, QMDIControl, QDial, QScriptEditExtraArea, QColumnViewGrip, QScrollBar, and QSizeGrip.

Definition at line 9286 of file qwidget.cpp.

Referenced by QComboBox::addItems(), event(), QSizeGrip::mouseReleaseEvent(), QMdiSubWindow::mouseReleaseEvent(), QColorShowLabel::setColor(), and setShown().

 {
     event->ignore();
 }

◆ move() [1/2]

void QWidget::move	(	int	x,
		int	y
	)

inline

This corresponds to move(QPoint(x, y)).

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 1011 of file qwidget.h.

Referenced by QAxServerBase::ActiveXProc(), QWorkspace::addWindow(), QDialog::adjustPosition(), QWorkspace::arrangeIcons(), QBalloonTip::balloon(), QX11Data::dndEnable(), do_size_hints(), QStatusBar::event(), QAlphaWidget::eventFilter(), findRealWindow(), QWorkspacePrivate::insertIcon(), QComboBox::keyPressEvent(), QTabBarPrivate::layoutTab(), QWidgetResizeHandler::mouseMoveEvent(), QToolBarPrivate::mouseMoveEvent(), QWorkspaceTitleBar::mouseMoveEvent(), QRubberBand::move(), QTipLabel::placeTip(), QDateTimeEditPrivate::positionCalendarPopup(), qt_x11_recreateWidget(), QtWndProc(), qWinProcessConfigRequests(), QWorkspaceChild::QWorkspaceChild(), QApplication::qwsProcessEvent(), QWorkspaceChild::resizeEvent(), QExpandingLineEdit::resizeToContents(), restoreGeometry(), QDockAreaLayoutInfo::restoreState(), QAlphaWidget::run(), QRollEffect::run(), QWhatsThisPrivate::say(), QRollEffect::scroll(), QDockWidget::setFloating(), QSplashScreen::setPixmap(), QMdiSubWindowPrivate::setSizeGrip(), setWindowFlags(), QScrollAreaPrivate::updateWidgetPosition(), and QWorkspacePrivate::updateWorkspace().

1012 { move(QPoint(ax, ay)); }

QPoint

The QPoint class defines a point in the plane using integer precision.

Definition: qpoint.h:53

QWidget::move

void move(int x, int y)

This corresponds to move(QPoint(x, y)).

Definition: qwidget.h:1011

◆ move() [2/2]

void QWidget::move ( const QPoint & p )

Definition at line 7174 of file qwidget.cpp.

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_Moved);
     if (isWindow())
         d->topData()->posFromMove = true;
     if (testAttribute(Qt::WA_WState_Created)) {
         d->setGeometry_sys(p.x() + geometry().x() - QWidget::x(),
                        p.y() + geometry().y() - QWidget::y(),
                        width(), height(), true);
         d->setDirtyOpaqueRegion();
     } else {
         data->crect.moveTopLeft(p); // no frame yet
         setAttribute(Qt::WA_PendingMoveEvent);
     }
 }

◆ moveEvent()

void QWidget::moveEvent ( QMoveEvent * event )

protectedvirtual

This event handler can be reimplemented in a subclass to receive widget move events which are passed in the event parameter.

When the widget receives this event, it is already at the new position.

The old position is accessible through QMoveEvent::oldPos().

See also: resizeEvent(), event(), move(), QMoveEvent

Reimplemented in QWorkspaceChild, QMdiSubWindow, QRubberBand, QSizeGrip, and QWSEmbedWidget.

Definition at line 9566 of file qwidget.cpp.

Referenced by event(), QMdiSubWindow::moveEvent(), QRubberBand::resize(), and setShown().

9567 {

9568 }

◆ nativeParentWidget()

QWidget * QWidget::nativeParentWidget ( ) const

Returns the native parent for this widget, i.

Since: 4.4

e. the next ancestor widget that has a system identifier, or 0 if it does not have any native parent.

See also: effectiveWinId()

Definition at line 4514 of file qwidget.cpp.

Referenced by QX11PaintEngine::begin(), QPainter::begin(), QWindowsVistaStyle::drawComplexControl(), effectiveWinId(), flipPoint(), ShivaVGWindowSurface::flush(), QVGWindowSurface::flush(), QGLWindowSurface::flush(), QWidgetPrivate::hide_sys(), QWidgetPrivate::isBackgroundInherited(), QWidgetBackingStore::markDirtyOnScreen(), QBBNativeInterface::nativeResourceForWidget(), q_createNativeChildrenAndSetParent(), qt_grab_cursor(), qt_mac_update_widget_position(), qt_mac_updateParentUnderAlienWidget(), qt_x11_enforce_cursor(), QWidgetPrivate::scroll_sys(), QWidgetPrivate::show_sys(), QWidgetBackingStore::showYellowThing(), QXIMInputContext::update(), updateRedirectedToGraphicsProxyWidget(), and QApplication::x11ProcessEvent().

 {
     QWidget *parent = parentWidget();
     while (parent && !parent->internalWinId())
         parent = parent->parentWidget();
     return parent;
 }

◆ nextInFocusChain()

QWidget * QWidget::nextInFocusChain ( ) const

Returns the next widget in this widget's focus chain.

See also: previousInFocusChain()

Definition at line 6873 of file qwidget.cpp.

Referenced by QGroupBoxPrivate::_q_fixFocus(), QAxServerBase::ActiveXProc(), QX11EmbedWidgetPrivate::getFocusWidget(), iWantTheFocus(), QtWndProc(), QMdiSubWindowPrivate::setFocusWidget(), QDialog::setVisible(), and QAxServerBase::TranslateAcceleratorW().

 {
     return const_cast<QWidget *>(d_func()->focus_next);
 }

◆ normalGeometry()

QRect QWidget::normalGeometry ( ) const

Referenced by saveGeometry(), and setDisabled().

◆ overrideWindowFlags()

void QWidget::overrideWindowFlags ( Qt::WindowFlags flags )

Sets the window flags for the widget to flags, without telling the window system.

Warning: Do not call this function unless you really know what you're doing.

See also: setWindowFlags()

Definition at line 10434 of file qwidget.cpp.

 {
     data->window_flags = flags;
 }

◆ overrideWindowState()

void QWidget::overrideWindowState ( Qt::WindowStates newstate )

Warning: This function is not part of the public interface.

The function sets the window state on child widgets similar to setWindowState(). The difference is that the window state changed event has the isOverride() flag set. It exists mainly to keep Q3Workspace working.

Definition at line 3098 of file qwidget.cpp.

Referenced by QWorkspaceChild::adjustToFullscreen(), QMdiSubWindowPrivate::ensureWindowState(), QWorkspaceChild::eventFilter(), QWorkspacePrivate::maximizeWindow(), QWorkspacePrivate::minimizeWindow(), QWorkspacePrivate::normalizeWindow(), QWorkspaceChild::resizeEvent(), QMdiSubWindowPrivate::setActive(), and QWorkspaceChild::showShaded().

 {
     QWindowStateChangeEvent e(Qt::WindowStates(data->window_state), true);
     data->window_state  = newstate;
     QApplication::sendEvent(this, &e);
 }

◆ paintEngine()

QPaintEngine * QWidget::paintEngine ( ) const

virtual

Returns the widget's paint engine.

Note that this function should not be called explicitly by the user, since it's meant for reimplementation purposes only. The function is called by Qt internally, and the default implementation may not always return a valid pointer.

Implements QPaintDevice.

Reimplemented in QGLWidget.

Definition at line 5188 of file qwidget_mac.mm.

Referenced by QWidgetPrivate::drawWidget(), effectiveState(), make_widget_eventUPP(), setAttribute(), QWidgetPrivate::setWindowRole(), and QWidgetBackingStore::showYellowThing().

 {
     QPaintEngine *&pe = engineHandler()->engine;
     if (!pe)
         pe = new QCoreGraphicsPaintEngine();
     if (pe->isActive()) {
         QPaintEngine *engine = new QCoreGraphicsPaintEngine();
         engine->setAutoDestruct(true);
         return engine;
     }
     return pe;
 }

◆ paintEvent()

void QWidget::paintEvent ( QPaintEvent * event )

protectedvirtual

This event handler can be reimplemented in a subclass to receive paint events passed in event.

A paint event is a request to repaint all or part of a widget. It can happen for one of the following reasons:

repaint() or update() was invoked,
the widget was obscured and has now been uncovered, or
many other reasons.

Many widgets can simply repaint their entire surface when asked to, but some slow widgets need to optimize by painting only the requested region: QPaintEvent::region(). This speed optimization does not change the result, as painting is clipped to that region during event processing. QListView and QTableView do this, for example.

Qt also tries to speed up painting by merging multiple paint events into one. When update() is called several times or the window system sends several paint events, Qt merges these events into one event with a larger region (see QRegion::united()). The repaint() function does not permit this optimization, so we suggest using update() whenever possible.

When the paint event occurs, the update region has normally been erased, so you are painting on the widget's background.

The background can be set using setBackgroundRole() and setPalette().

Since Qt 4.0, QWidget automatically double-buffers its painting, so there is no need to write double-buffering code in paintEvent() to avoid flicker.

Note for the X11 platform: It is possible to toggle global double buffering by calling qt_x11_set_global_double_buffer(). For example,

...
extern void qt_x11_set_global_double_buffer(bool);
qt_x11_set_global_double_buffer(false);
...

Note: Generally, you should refrain from calling update() or repaint() inside a paintEvent(). For example, calling update() or repaint() on children inside a paintevent() results in undefined behavior; the child may or may not get a paint event.

Warning: If you are using a custom paint engine without Qt's backingstore, Qt::WA_PaintOnScreen must be set. Otherwise, QWidget::paintEngine() will never be called; the backingstore will be used instead.

See also: event(), repaint(), update(), QPainter, QPixmap, QPaintEvent, {Analog Clock Example}

Reimplemented in QPrevNextCalButton, QCalToolButton, QColorShowLabel, QWorkspaceChild, QColorLuminancePicker, QColorPicker, QTableCornerButton, QGLWidget, QMdi::ControllerWidget, QWizardAntiFlickerWidget, QMdi::ControlLabel, QFileDialogComboBox, QRollEffect, QShapedPixmapWidget, QTextEdit, QWizardHeader, QWorkspaceTitleBar, QGraphicsView, CloseButton, QComboBox, QPlainTextEdit, QLineEdit, QHeaderView, QDateTimeEdit, QTabBar, QWizard, QComboBoxPrivateScroller, QTreeView, QMenu, QSplitterHandle, QListView, QWhatsThat, QTabWidget, QPagePreview, QSystemTrayIconSys, QWellArray, QMdiArea, QAbstractSpinBox, QTableView, QToolBar, QTipLabel, QLabel, QMenuBar, QAxHostWidget, QAbstractButton, QFrame, QMdiSubWindow, QDockWidgetTitleButton, QDockWidget, QLCDNumber, QTextBrowser, QProgressBar, QX11EmbedContainer, QToolButton, QBalloonTip, QShapedPixmapWidget, QWorkspace, QDeclarativeView, QAbstractScrollArea, QComboBoxListView, QSlider, QPushButton, QStatusBar, QGroupBox, QScriptEdit, QMenuBarExtension, QMDIControl, QDial, QCheckBox, QRubberBand, QToolBoxButton, QVistaBackButton, QColumnViewGrip, QToolBarSeparator, QCommandLinkButton, QAlphaWidget, QSvgWidget, QScrollBar, QScriptEditExtraArea, QFocusFrame, QRadioButton, QToolBarExtension, and QSizeGrip.

Definition at line 9548 of file qwidget.cpp.

Referenced by QComboBox::addItems(), event(), QToolBar::isAreaAllowed(), QDockWidget::isAreaAllowed(), QMdiSubWindow::paintEvent(), QRubberBand::resize(), setShown(), and QProgressBar::textDirection().

9549 {

9550 }

◆ palette()

const QPalette& QWidget::palette ( ) const

Referenced by QBalloonTip::balloon(), QLabel::changeEvent(), QLineEdit::changeEvent(), QPlainTextEdit::changeEvent(), QTextEdit::changeEvent(), event(), QScriptEdit::extraAreaPaintEvent(), QCalendarModel::formatForCell(), QMenuBar::initStyleOption(), QMenu::initStyleOption(), QAxClientSite::Invoke(), QMenuBar::minimumSizeHint(), QTabWidget::minimumSizeHint(), QWellArray::paintCell(), QCommandLinkButton::paintEvent(), QStatusBar::paintEvent(), QComboBoxListView::paintEvent(), QMenuBar::paintEvent(), QToolBar::paintEvent(), QWhatsThat::paintEvent(), QSplitterHandle::paintEvent(), QMenu::paintEvent(), QLineEdit::paintEvent(), QPlainTextEdit::paintEvent(), QComboBox::paintEvent(), QWizardHeader::paintEvent(), QColorLuminancePicker::paintEvent(), QWorkspaceChild::paintEvent(), QCalToolButton::paintEvent(), QGLOverlayWidget::paintGL(), QmlJSDebugger::ColorPickerTool::pickColor(), QBalloonTip::QBalloonTip(), QMdiArea::QMdiArea(), QWizardPrivate::recreateLayout(), setForegroundRole(), QToolTip::setPalette(), QWidgetPrivate::setPalette_helper(), QWorkspace::sizeHint(), QMenuBar::sizeHint(), QToolBoxPrivate::updateTabs(), QComboBoxPrivate::updateViewContainerPaletteAndOpacity(), and QComboBoxPrivate::viewContainerPalette().

◆ paletteChange()

void QWidget::paletteChange ( const QPalette & )

protectedvirtual

Warning: This function is not part of the public interface.

Definition at line 12002 of file qwidget.cpp.

12002 { } // compat

◆ parentWidget()

QWidget * QWidget::parentWidget ( ) const

inline

Returns the parent of this widget, or 0 if it does not have any parent widget.

Use the no-argument overload instead.

Definition at line 1035 of file qwidget.h.

1036 { return static_cast<QWidget *>(QObject::parent()); }

QWidget

The QWidget class is the base class of all user interface objects.

Definition: qwidget.h:150

QObject::parent

QObject * parent() const

Returns a pointer to the parent object.

Definition: qobject.h:273

◆ pos()

QPoint QWidget::pos ( ) const

Referenced by QMainWindowPrivate::adjustCursor(), QSplitterPrivate::adjustPos(), QDialog::adjustPosition(), axc_FilterProc(), QTreeViewPrivate::calcLogicalIndices(), QGraphicsView::centerOn(), QAbstractSpinBox::contextMenuEvent(), QDateTimeEdit::dateTimeFromText(), QAbstractItemView::doAutoScroll(), QSplitterPrivate::doResize(), QLCDNumberPrivate::drawSegment(), QLCDNumberPrivate::drawString(), QScriptDebuggerCodeView::event(), QGroupBox::event(), QStatusBar::event(), QDockWidget::event(), QToolBar::event(), QTabBar::event(), QMainWindow::event(), event(), QTipLabel::eventFilter(), QCalendarWidget::eventFilter(), QMenu::exec(), fixToolBarOrientation(), QCalendarView::handleMouseEvent(), QAccessibleDisplay::imagePosition(), QToolButton::initStyleOption(), insertAction(), QMenu::internalDelayedPopup(), QMdiSubWindow::keyPressEvent(), QDateTimeEdit::keyPressEvent(), QVistaHelper::leftMargin(), mapTo(), QHeaderView::mouseDoubleClickEvent(), QMenuPrivate::mouseEventTaken(), QTipLabel::mouseMoveEvent(), QSplitterHandle::mouseMoveEvent(), QComboBoxPrivateScroller::mouseMoveEvent(), QHeaderView::mouseMoveEvent(), QPlainTextEdit::mouseMoveEvent(), QTextEdit::mouseMoveEvent(), QWellArray::mousePressEvent(), QHeaderView::mousePressEvent(), QAbstractItemView::mousePressEvent(), QSplitterHandle::mouseReleaseEvent(), QHeaderView::mouseReleaseEvent(), QAbstractItemView::mouseReleaseEvent(), QSplitter::moveSplitter(), QSplitterHandle::moveSplitter(), parseGeometry(), QTipLabel::placeTip(), QMenu::popup(), QMenuBarPrivate::popupAction(), QtWndProc(), QApplication::qwsProcessEvent(), QTreeViewPrivate::renderTreeToPixmapForAnimation(), QHeaderView::resizeSection(), QExpandingLineEdit::resizeToContents(), QHeaderViewPrivate::sectionHandleAt(), QLineEdit::selectionStart(), QMainWindowLayout::separatorMove(), setDisabled(), QComboBox::setModel(), QTabWidget::setTabPosition(), setWindowFlags(), QToolTip::showText(), QMainWindowLayout::startSeparatorMove(), QWorkspace::tile(), QTreeView::timerEvent(), QPlainTextEdit::timerEvent(), QTextEdit::timerEvent(), QETWidget::translateMouseEvent(), QMenuBarPrivate::updateGeometries(), QTabWidgetPrivate::updateTabBarPosition(), QSpinBox::valueFromText(), QDoubleSpinBox::valueFromText(), QAbstractItemView::viewportEvent(), and QComboBoxPrivate::~QComboBoxPrivate().

◆ previousInFocusChain()

QWidget * QWidget::previousInFocusChain ( ) const

The previousInFocusChain function returns the previous widget in this widget's focus chain.

See also: nextInFocusChain()

Since: 4.6

Definition at line 6889 of file qwidget.cpp.

 {
     return const_cast<QWidget *>(d_func()->focus_prev);
 }

◆ qwsEvent()

bool QWidget::qwsEvent ( QWSEvent * event )

protectedvirtual

This special event handler can be reimplemented in a subclass to receive native Qt for Embedded Linux events which are passed in the event parameter.

In your reimplementation of this function, if you want to stop the event being handled by Qt, return true. If you return false, this native event is passed back to Qt, which translates the event into a Qt event and sends it to the widget.

Warning: This function is not portable.

See also: QApplication::qwsEventFilter()

Definition at line 9993 of file qwidget.cpp.

Referenced by QApplication::qwsProcessEvent(), and setShown().

 {
     return false;
 }

◆ raise

void QWidget::raise ( )

slot

Raises this widget to the top of the parent widget's stack.

After this call the widget will be visually in front of any overlapping sibling widgets.

Note: When using activateWindow(), you can call this function to ensure that the window is stacked on top.

See also: lower(), stackUnder()

Definition at line 11901 of file qwidget.cpp.

Referenced by QCalendarWidgetPrivate::_q_yearClicked(), QMessageBox::about(), QMessageBox::aboutQt(), QAxServerBase::ActiveXProc(), QWidgetPrivate::createWinId(), effectiveState(), QApplicationPrivate::globalEventProcessor(), QMdiAreaPrivate::internalRaise(), QWorkspaceChild::internalRaise(), qt_try_modal(), QApplication::qwsProcessEvent(), QStackedLayout::setCurrentIndex(), QToolBarLayout::setExpanded(), QMdiSubWindowPrivate::setSizeGrip(), QComboBox::showPopup(), QMdiAreaPrivate::showRubberBandFor(), QDockAreaLayoutInfo::updateSeparatorWidgets(), QDockAreaLayout::updateSeparatorWidgets(), and QApplication::x11ClientMessage().

 {
     Q_D(QWidget);
     if (!isWindow()) {
         QWidget *p = parentWidget();
         const int parentChildCount = p->d_func()->children.size();
         if (parentChildCount < 2)
             return;
         const int from = p->d_func()->children.indexOf(this);
         Q_ASSERT(from >= 0);
         // Do nothing if the widget is already in correct stacking order _and_ created.
         if (from != parentChildCount -1)
             p->d_func()->children.move(from, parentChildCount - 1);
         if (!testAttribute(Qt::WA_WState_Created) && p->testAttribute(Qt::WA_WState_Created))
             create();
         else if (from == parentChildCount - 1)
             return;
 
         QRegion region(rect());
         d->subtractOpaqueSiblings(region);
         d->invalidateBuffer(region);
     }
     if (testAttribute(Qt::WA_WState_Created))
         d->raise_sys();
 
     QEvent e(QEvent::ZOrderChange);
     QApplication::sendEvent(this, &e);
 }

◆ rect()

QRect QWidget::rect ( ) const

inline

Referenced by QMenuPrivate::actionAt(), QLineEditPrivate::adjustedControlRect(), QPushButtonPrivate::adjustedMenuPosition(), QDialog::adjustPosition(), QWorkspaceChild::adjustToFullscreen(), QDesktopWidget::availableGeometry(), QTreeViewPrivate::beginAnimatedOperation(), QMenuBarPrivate::calcActionRects(), QDialog::contextMenuEvent(), QAbstractItemViewPrivate::draggablePaintPairs(), QListViewPrivate::draggablePaintPairs(), QAbstractItemView::dragMoveEvent(), QGroupBox::event(), QTipLabel::eventFilter(), QComboBoxPrivateContainer::eventFilter(), QScriptEdit::extraAreaPaintEvent(), QAbstractItemViewPrivate::fetchMore(), fillRegion(), QSystemTrayIconSys::findIconGeometry(), QAxClientSite::GetIDsOfNames(), QMenuBar::heightForWidth(), QAbstractButton::hitButton(), QAbstractItemView::horizontalScrollbarValueChanged(), QListViewPrivate::horizontalScrollToValue(), QListView::indexAt(), QDesktopWidgetPrivate::init(), QMenuBar::initStyleOption(), QMenu::initStyleOption(), QGraphicsView::invalidateScene(), QWidgetPrivate::isOverlapped(), QTreeViewPrivate::itemDecorationRect(), QAbstractItemView::keyPressEvent(), QMenuBar::minimumSizeHint(), QAbstractSpinBox::minimumSizeHint(), QScrollBar::mouseMoveEvent(), QCheckBox::mouseMoveEvent(), QTipLabel::mouseMoveEvent(), QListView::mouseMoveEvent(), QMenu::mouseMoveEvent(), QComboBoxPrivateScroller::mouseMoveEvent(), QWorkspaceTitleBar::mouseMoveEvent(), QWhatsThat::mousePressEvent(), QMenu::mousePressEvent(), QCalendarPopup::mousePressEvent(), QWorkspaceTitleBar::mousePressEvent(), QAbstractItemView::mousePressEvent(), mousePressEvent(), QmlJSDebugger::ZoomTool::mouseReleaseEvent(), QWhatsThat::mouseReleaseEvent(), QLineEdit::mouseReleaseEvent(), QPlainTextEdit::mouseReleaseEvent(), QWorkspaceTitleBar::mouseReleaseEvent(), QTextEdit::mouseReleaseEvent(), QListView::moveCursor(), QAbstractButtonPrivate::moveFocus(), QComboBoxDelegate::paint(), QCalendarDelegate::paint(), QWellArray::paintCell(), QCalendarDelegate::paintCell(), QFocusFrame::paintEvent(), QVistaBackButton::paintEvent(), QBalloonTip::paintEvent(), QMdiSubWindow::paintEvent(), QMenuBar::paintEvent(), QWellArray::paintEvent(), QSystemTrayIconSys::paintEvent(), QWhatsThat::paintEvent(), QMenu::paintEvent(), QComboBoxPrivateScroller::paintEvent(), QTabBar::paintEvent(), QLineEdit::paintEvent(), QGraphicsView::paintEvent(), QWorkspaceChild::paintEvent(), QGLOverlayWidget::paintGL(), QHeaderView::paintSection(), QToolButtonPrivate::popupTimerDone(), QAbstractItemViewPrivate::position(), QTreeViewPrivate::prepareAnimatedOperation(), QCalendarDelegate::QCalendarDelegate(), QApplication::qwsProcessEvent(), raise(), QAccessibleMenuItem::rect(), QAccessibleItemView::rect(), QAccessibleDial::rect(), QAccessibleComboBox::rect(), QAccessibleDockWidget::rect(), QWidgetPrivate::render_helper(), repaint(), QWSEmbedWidget::resizeEvent(), QDeclarativeView::resizeEvent(), QDialog::resizeEvent(), QAxHostWidget::resizeObject(), QmlJSDebugger::ZoomTool::scaleView(), QDesktopWidget::screenGeometry(), scroll(), QListView::scrollTo(), QTreeView::scrollTo(), QmlJSDebugger::SubcomponentMaskLayerItem::setCurrentItem(), QMenuPrivate::setFirstActionActive(), QFrame::setFrameRect(), setGeometry(), setGraphicsEffect(), setMask(), QGraphicsView::setSceneRect(), QDialog::setSizeGripEnabled(), QTipLabel::setTipRect(), QHeaderViewPrivate::setupSectionIndicator(), QWSEmbedWidget::showEvent(), QMenuBar::sizeHint(), QAbstractSpinBox::sizeHint(), QMenu::sizeHint(), QDateTimeEdit::sizeHint(), QAbstractItemView::startDrag(), QAccessibleTable2Cell::state(), QTabBar::tabRect(), QTableView::timerEvent(), QTreeView::timerEvent(), QTipLabel::tipChanged(), QVistaHelper::topPadding(), QAbstractItemView::update(), update(), QMenuPrivate::updateActionRects(), QScriptEdit::updateExtraArea(), QMenuBarPrivate::updateGeometries(), QWorkspaceChild::updateMask(), QGraphicsView::updateScene(), QGraphicsView::updateSceneRect(), QAbstractItemView::verticalScrollbarValueChanged(), QListViewPrivate::verticalScrollToValue(), QTreeView::viewportEvent(), QColumnView::visualRect(), QListView::visualRegionForSelection(), QMenu::wheelEvent(), and QApplication::x11ProcessEvent().

◆ releaseDC()

void QWidget::releaseDC ( HDC hdc ) const

virtual

Releases the HDC hdc acquired by a previous call to getDC().

Warning: Using this function is not portable.

Reimplemented from QPaintDevice.

Definition at line 11862 of file qwidget.cpp.

Referenced by QRasterWindowSurface::flush(), and showYellowThing_win().

 {
     Q_D(const QWidget);
     // If its the widgets own dc, it will be released elsewhere. If
     // its a different HDC we release it and issue a warning if it
     // fails.
     if (hdc != d->hd && !ReleaseDC(winId(), hdc))
         qErrnoWarning("QWidget::releaseDC(): failed to release HDC");
 }

◆ releaseKeyboard()

void QWidget::releaseKeyboard ( )

Releases the keyboard grab.

See also: grabKeyboard(), grabMouse(), releaseMouse()

Definition at line 3347 of file qwidget_mac.mm.

Referenced by QWidgetResizeHandler::eventFilter(), grabKeyboard(), isServerProcess(), QWidgetResizeHandler::keyPressEvent(), qstring_to_xtp(), and qt_grab_cursor().

 {
     if(!qt_nograb() && mac_keyboard_grabber == this)
         mac_keyboard_grabber = 0;
 }

◆ releaseMouse()

void QWidget::releaseMouse ( )

Releases the mouse grab.

See also: grabMouse(), grabKeyboard(), releaseKeyboard()

Definition at line 3330 of file qwidget_mac.mm.

Referenced by QWidgetResizeHandler::eventFilter(), grabMouse(), isServerProcess(), QWidgetResizeHandler::keyPressEvent(), QVistaHelper::mouseReleaseEvent(), qJournalRecordProc(), qstring_to_xtp(), and qt_grab_cursor().

 {
     if(!qt_nograb() && mac_mouse_grabber == this) {
         mac_mouse_grabber = 0;
         qt_mac_setMouseGrabCursor(false);
     }
 }

◆ releaseShortcut()

void QWidget::releaseShortcut ( int id )

Removes the shortcut with the given id from Qt's shortcut system.

The widget will no longer receive QEvent::Shortcut events for the shortcut's key sequence (unless it has other shortcuts with the same key sequence).

Warning: You should not normally need to use this function since Qt's shortcut system removes shortcuts automatically when their parent widget is destroyed. It is best to use QAction or QShortcut to handle shortcuts, since they are easier to use than this low-level function. Note also that this is an expensive operation.

See also: grabShortcut() setShortcutEnabled()

Definition at line 11771 of file qwidget.cpp.

Referenced by QTabBar::removeTab(), QLabel::setBuddy(), QAbstractButton::setShortcut(), QTabBar::setTabText(), and QGroupBox::setTitle().

 {
     Q_ASSERT(qApp);
     if (id)
         qApp->d_func()->shortcutMap.removeShortcut(id, this, 0);
 }

◆ removeAction()

void QWidget::removeAction ( QAction * action )

Removes the action action from this widget's list of actions.

See also: insertAction(), actions(), insertAction()

Definition at line 3386 of file qwidget.cpp.

Referenced by QMenuBar::clear(), QToolBar::clear(), QMenu::clear(), QAbstractSpinBox::contextMenuEvent(), QDialogButtonBox::event(), QAbstractItemView::focusOutEvent(), insertAction(), QAbstractItemView::keyPressEvent(), QPushButton::setMenu(), QToolButton::setMenu(), QTornOffMenu::syncWithMenu(), QToolBarLayout::takeAt(), and QAction::~QAction().

 {
     if (!action)
         return;
 
     Q_D(QWidget);
 
     QActionPrivate *apriv = action->d_func();
     apriv->widgets.removeAll(this);
 
     if (d->actions.removeAll(action)) {
         QActionEvent e(QEvent::ActionRemoved, action);
         QApplication::sendEvent(this, &e);
     }
 }

◆ render() [1/2]

void QWidget::render	(	QPaintDevice *	target,
		const QPoint &	targetOffset = `QPoint()`,
		const QRegion &	sourceRegion = `QRegion()`,
		RenderFlags	renderFlags = `RenderFlags(DrawWindowBackground \| DrawChildren)`
	)

Renders the sourceRegion of this widget into the target using renderFlags to determine how to render.

Since: 4.3

Rendering starts at targetOffset in the target. For example:

QPixmap pixmap(widget->size());

widget->render(&pixmap);

If sourceRegion is a null region, this function will use QWidget::rect() as the region, i.e. the entire widget.

Ensure that you call QPainter::end() for the target device's active painter (if any) before rendering. For example:

QPainter painter(this);
...
painter.end();
myWidget->render(this);

Note: To obtain the contents of an OpenGL widget, use QGLWidget::grabFrameBuffer() or QGLWidget::renderPixmap() instead.

Definition at line 5372 of file qwidget.cpp.

Referenced by QPixmap::grabWidget(), render(), and QTreeViewPrivate::renderTreeToPixmapForAnimation().

 {
     d_func()->render(target, targetOffset, sourceRegion, renderFlags, false);
 }

◆ render() [2/2]

void QWidget::render	(	QPainter *	painter,
		const QPoint &	targetOffset = `QPoint()`,
		const QRegion &	sourceRegion = `QRegion()`,
		RenderFlags	renderFlags = `RenderFlags(DrawWindowBackground \| DrawChildren)`
	)

Renders the widget into the painter's QPainter::device().

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Transformations and settings applied to the painter will be used when rendering.

Note: The painter must be active. On Mac OS X the widget will be rendered into a QPixmap and then drawn by the painter.

See also: QPainter::device()

Definition at line 5394 of file qwidget.cpp.

 {
     if (!painter) {
         qWarning("QWidget::render: Null pointer to painter");
         return;
     }
 
     if (!painter->isActive()) {
         qWarning("QWidget::render: Cannot render with an inactive painter");
         return;
     }
 
     const qreal opacity = painter->opacity();
     if (qFuzzyIsNull(opacity))
         return; // Fully transparent.
 
     Q_D(QWidget);
     const bool inRenderWithPainter = d->extra && d->extra->inRenderWithPainter;
     const QRegion toBePainted = !inRenderWithPainter ? d->prepareToRender(sourceRegion, renderFlags)
                                                      : sourceRegion;
     if (toBePainted.isEmpty())
         return;
 
     if (!d->extra)
         d->createExtra();
     d->extra->inRenderWithPainter = true;
 
 #ifdef Q_WS_MAC
     d->render_helper(painter, targetOffset, toBePainted, renderFlags);
 #else
     QPaintEngine *engine = painter->paintEngine();
     Q_ASSERT(engine);
     QPaintEnginePrivate *enginePriv = engine->d_func();
     Q_ASSERT(enginePriv);
     QPaintDevice *target = engine->paintDevice();
     Q_ASSERT(target);
 
     // Render via a pixmap when dealing with non-opaque painters or printers.
     if (!inRenderWithPainter && (opacity < 1.0 || (target->devType() == QInternal::Printer))) {
         d->render_helper(painter, targetOffset, toBePainted, renderFlags);
         d->extra->inRenderWithPainter = false;
         return;
     }
 
     // Set new shared painter.
     QPainter *oldPainter = d->sharedPainter();
     d->setSharedPainter(painter);
 
     // Save current system clip, viewport and transform,
     const QTransform oldTransform = enginePriv->systemTransform;
     const QRegion oldSystemClip = enginePriv->systemClip;
     const QRegion oldSystemViewport = enginePriv->systemViewport;
 
     // This ensures that all painting triggered by render() is clipped to the current engine clip.
     if (painter->hasClipping()) {
         const QRegion painterClip = painter->deviceTransform().map(painter->clipRegion());
         enginePriv->setSystemViewport(oldSystemClip.isEmpty() ? painterClip : oldSystemClip & painterClip);
     } else {
         enginePriv->setSystemViewport(oldSystemClip);
     }
 
     render(target, targetOffset, toBePainted, renderFlags);
 
     // Restore system clip, viewport and transform.
     enginePriv->systemClip = oldSystemClip;
     enginePriv->setSystemViewport(oldSystemViewport);
     enginePriv->setSystemTransform(oldTransform);
 
     // Restore shared painter.
     d->setSharedPainter(oldPainter);
 #endif
 
     d->extra->inRenderWithPainter = false;
 }

◆ repaint [1/4]

void QWidget::repaint ( )

slot

Repaints the widget directly by calling paintEvent() immediately, unless updates are disabled or the widget is hidden.

We suggest only using repaint() if you need an immediate repaint, for example during animation. In almost all circumstances update() is better, as it permits Qt to optimize for speed and minimize flicker.

Warning: If you call repaint() in a function which may itself be called from paintEvent(), you may get infinite recursion. The update() function never causes recursion.

See also: update(), paintEvent(), setUpdatesEnabled()

Definition at line 10761 of file qwidget.cpp.

Referenced by QAbstractButton::animateClick(), QColorShowLabel::dropEvent(), QStatusBar::hideOrShow(), QAbstractButton::keyPressEvent(), QScrollBar::mouseMoveEvent(), QAbstractButton::mouseMoveEvent(), QScrollBar::mousePressEvent(), QAbstractButton::mousePressEvent(), QTabBar::mousePressEvent(), qt_event_request_showsheet(), QAlphaWidget::render(), QSplashScreen::repaint(), repaint(), QProgressBar::reset(), QRollEffect::scroll(), QProgressBar::setAlignment(), QColorPicker::setCol(), QColorLuminancePicker::setCol(), setDisabledStyle(), QProgressBar::setTextVisible(), QColorLuminancePicker::setVal(), QProgressBar::setValue(), QColorShower::showCurrentColor(), and QToolButton::showMenu().

 {
     repaint(rect());
 }

◆ repaint() [2/4]

void QWidget::repaint	(	int	x,
		int	y,
		int	w,
		int	h
	)

This version repaints a rectangle (x, y, w, h) inside the widget.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

If w is negative, it is replaced with width() - x, and if h is negative, it is replaced width height() - y.

Definition at line 10777 of file qwidget.cpp.

 {
     if (x > data->crect.width() || y > data->crect.height())
         return;
 
     if (w < 0)
         w = data->crect.width()  - x;
     if (h < 0)
         h = data->crect.height() - y;
 
     repaint(QRect(x, y, w, h));
 }

◆ repaint() [3/4]

void QWidget::repaint ( const QRect & rect )

This version repaints a rectangle rect inside the widget.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 10797 of file qwidget.cpp.

 {
     Q_D(QWidget);
 
     if (testAttribute(Qt::WA_WState_ConfigPending)) {
         update(rect);
         return;
     }
 
     if (!isVisible() || !updatesEnabled() || rect.isEmpty())
         return;
 
     if (hasBackingStoreSupport()) {
 #ifdef QT_MAC_USE_COCOA
         if (qt_widget_private(this)->isInUnifiedToolbar) {
             qt_widget_private(this)->unifiedSurface->renderToolbar(this, true);
             return;
         }
 #endif // QT_MAC_USE_COCOA
         QTLWExtra *tlwExtra = window()->d_func()->maybeTopData();
         if (tlwExtra && !tlwExtra->inTopLevelResize && tlwExtra->backingStore) {
             tlwExtra->inRepaint = true;
             tlwExtra->backingStore->markDirty(rect, this, true);
             tlwExtra->inRepaint = false;
         }
     } else {
         d->repaint_sys(rect);
     }
 }

◆ repaint() [4/4]

void QWidget::repaint ( const QRegion & rgn )

This version repaints a region rgn inside the widget.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 10835 of file qwidget.cpp.

 {
     Q_D(QWidget);
 
     if (testAttribute(Qt::WA_WState_ConfigPending)) {
         update(rgn);
         return;
     }
 
     if (!isVisible() || !updatesEnabled() || rgn.isEmpty())
         return;
 
     if (hasBackingStoreSupport()) {
 #ifdef QT_MAC_USE_COCOA
         if (qt_widget_private(this)->isInUnifiedToolbar) {
             qt_widget_private(this)->unifiedSurface->renderToolbar(this, true);
             return;
         }
 #endif // QT_MAC_USE_COCOA
         QTLWExtra *tlwExtra = window()->d_func()->maybeTopData();
         if (tlwExtra && !tlwExtra->inTopLevelResize && tlwExtra->backingStore) {
             tlwExtra->inRepaint = true;
             tlwExtra->backingStore->markDirty(rgn, this, true);
             tlwExtra->inRepaint = false;
         }
     } else {
         d->repaint_sys(rgn);
     }
 }

◆ resetInputContext()

void QWidget::resetInputContext ( )

protected

This function can be called on the widget that currently has focus to reset the input method operating on it.

This function is providing for convenience, instead you should use QInputContext::reset() on the input context that was returned by inputContext().

See also: QInputContext, inputContext(), QInputContext::reset()

Definition at line 522 of file qwidget.cpp.

Referenced by QLineEdit::clear(), event(), QLineEdit::redo(), setShown(), and QLineEdit::undo().

 {
     if (!hasFocus())
         return;
 #ifndef QT_NO_IM
     QInputContext *qic = this->inputContext();
     if(qic)
         qic->reset();
 #endif // QT_NO_IM
 }

◆ resize() [1/2]

void QWidget::resize	(	int	w,
		int	h
	)

inline

This corresponds to resize(QSize(w, h)).

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 1014 of file qwidget.h.

Referenced by QMenu::actionEvent(), QAxClientSite::activateObject(), QMenuPrivate::QMacMenuPrivate::addAction(), adjustSize(), QMdiAreaPrivate::appendChild(), QMenuBar::changeEvent(), QMenu::changeEvent(), QWorkspaceChild::changeEvent(), CloseButton::CloseButton(), QMdiSubWindow::event(), QWorkspaceChild::eventFilter(), QWorkspaceChild::iconWidget(), QColumnViewGrip::moveGrip(), QtWndProc(), QWhatsThat::QWhatsThat(), qWinProcessConfigRequests(), QWorkspaceChild::QWorkspaceChild(), QRubberBand::resize(), QColumnViewPreviewColumn::resizeEvent(), QMdiArea::resizeEvent(), QWorkspaceChild::resizeEvent(), QExpandingLineEdit::resizeToContents(), QMdiAreaPrivate::resizeToMinimumTileSize(), restoreGeometry(), QDockAreaLayoutInfo::restoreState(), QTipLabel::reuseTip(), QAlphaWidget::run(), QRollEffect::run(), QRollEffect::scroll(), QProgressDialog::setBar(), QProgressDialog::setCancelButton(), QProgressDialog::setCancelButtonText(), setFixedSize(), QProgressDialog::setLabel(), QProgressDialog::setLabelText(), setMaximumSize(), setMinimumSize(), QSplashScreen::setPixmap(), QShapedPixmapWidget::setPixmap(), QDeclarativeView::setRootObject(), QMenu::setTearOffEnabled(), QProgressDialog::setValue(), QScrollArea::setWidget(), QGLGlobalShareWidget::shareWidget(), QMdiSubWindow::showEvent(), QProgressDialog::showEvent(), QMdiArea::showEvent(), QDialog::showExtension(), QMdiSubWindow::showShaded(), QWorkspaceChild::showShaded(), and QScrollAreaPrivate::updateScrollBars().

1015 { resize(QSize(w, h)); }

QWidget::resize

void resize(int w, int h)

This corresponds to resize(QSize(w, h)).

Definition: qwidget.h:1014

QSize

The QSize class defines the size of a two-dimensional object using integer point precision.

Definition: qsize.h:53

◆ resize() [2/2]

void QWidget::resize ( const QSize & s )

Definition at line 7200 of file qwidget.cpp.

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_Resized);
     if (testAttribute(Qt::WA_WState_Created)) {
         d->setGeometry_sys(geometry().x(), geometry().y(), s.width(), s.height(), false);
         d->setDirtyOpaqueRegion();
     } else {
         data->crect.setSize(s.boundedTo(maximumSize()).expandedTo(minimumSize()));
         setAttribute(Qt::WA_PendingResizeEvent);
     }
 }

◆ resizeEvent()

void QWidget::resizeEvent ( QResizeEvent * )

protectedvirtual

This event handler can be reimplemented in a subclass to receive widget resize events which are passed in the event parameter.

When resizeEvent() is called, the widget already has its new geometry. The old size is accessible through QResizeEvent::oldSize().

The widget will be erased and receive a paint event immediately after processing the resize event. No drawing need be (or should be) done inside this handler.

See also: moveEvent(), event(), resize(), QResizeEvent, paintEvent(), {Scribble Example}

Reimplemented in QWorkspaceChild, QColorPicker, QGLWidget, QAbstractItemView, QMessageBox, QTextEdit, QGraphicsView, QComboBoxPrivateContainer, QComboBox, QPlainTextEdit, QWizard, QTabBar, QSplitterHandle, QSystemTrayIconSys, QTabWidget, QListView, QMdiArea, QCalendarWidget, QToolBar, QTipLabel, QMenuBar, QAbstractSpinBox, QAxHostWidget, QProgressDialog, QMdiSubWindow, QSplitter, QX11EmbedContainer, QDialog, QBalloonTip, QWorkspace, QDeclarativeView, QAbstractScrollArea, QStatusBar, QColumnView, QGroupBox, QScriptEdit, QDesktopWidget, QComboBoxListView, QDial, QAxWidget, QScrollArea, QRubberBand, QColumnViewPreviewColumn, QX11EmbedWidget, and QWSEmbedWidget.

Definition at line 9587 of file qwidget.cpp.

Referenced by QComboBox::addItems(), QDesktopWidget::availableGeometry(), QGLWidget::event(), event(), QDesktopWidgetPrivate::init(), QToolBar::isAreaAllowed(), QCalendarWidget::isNavigationBarVisible(), QRubberBand::resize(), QX11EmbedWidget::resizeEvent(), QDial::resizeEvent(), QGroupBox::resizeEvent(), QStatusBar::resizeEvent(), QBalloonTip::resizeEvent(), QMdiSubWindow::resizeEvent(), QAbstractSpinBox::resizeEvent(), QTipLabel::resizeEvent(), QToolBar::resizeEvent(), QCalendarWidget::resizeEvent(), QTabWidget::resizeEvent(), QSystemTrayIconSys::resizeEvent(), QSplitterHandle::resizeEvent(), QComboBoxPrivateContainer::resizeEvent(), QColorPicker::resizeEvent(), and setShown().

9588 {

9589 }

◆ restoreGeometry()

bool QWidget::restoreGeometry ( const QByteArray & geometry )

Restores the geometry and state top-level widgets stored in the byte array geometry.

Since: 4.2

Returns true on success; otherwise returns false.

If the restored geometry is off-screen, it will be modified to be inside the available screen geometry.

To restore geometry saved using QSettings, you can use code like this:

QSettings settings("MyCompany", "MyApp");

myWidget->restoreGeometry(settings.value("myWidget/geometry").toByteArray());

See the Window Geometry documentation for an overview of geometry issues with windows.

Use QMainWindow::restoreState() to restore the geometry and the state of toolbars and dock widgets.

See also: saveGeometry(), QSettings, QMainWindow::saveState(), QMainWindow::restoreState()

Definition at line 7313 of file qwidget.cpp.

Referenced by QScriptEngineDebugger::standardWindow().

 {
     if (geometry.size() < 4)
         return false;
     QDataStream stream(geometry);
     stream.setVersion(QDataStream::Qt_4_0);
 
     const quint32 magicNumber = 0x1D9D0CB;
     quint32 storedMagicNumber;
     stream >> storedMagicNumber;
     if (storedMagicNumber != magicNumber)
         return false;
 
     const quint16 currentMajorVersion = 1;
     quint16 majorVersion = 0;
     quint16 minorVersion = 0;
 
     stream >> majorVersion >> minorVersion;
 
     if (majorVersion != currentMajorVersion)
         return false;
     // (Allow all minor versions.)
 
     QRect restoredFrameGeometry;
      QRect restoredNormalGeometry;
     qint32 restoredScreenNumber;
     quint8 maximized;
     quint8 fullScreen;
 
     stream >> restoredFrameGeometry
            >> restoredNormalGeometry
            >> restoredScreenNumber
            >> maximized
            >> fullScreen;
 
     const int frameHeight = 20;
     if (!restoredFrameGeometry.isValid())
         restoredFrameGeometry = QRect(QPoint(0,0), sizeHint());
 
     if (!restoredNormalGeometry.isValid())
         restoredNormalGeometry = QRect(QPoint(0, frameHeight), sizeHint());
     if (!restoredNormalGeometry.isValid()) {
         // use the widget's adjustedSize if the sizeHint() doesn't help
         restoredNormalGeometry.setSize(restoredNormalGeometry
                                        .size()
                                        .expandedTo(d_func()->adjustedSize()));
     }
 
     const QDesktopWidget * const desktop = QApplication::desktop();
     if (restoredScreenNumber >= desktop->numScreens())
         restoredScreenNumber = desktop->primaryScreen();
 
     const QRect availableGeometry = desktop->availableGeometry(restoredScreenNumber);
 
     // Modify the restored geometry if we are about to restore to coordinates
     // that would make the window "lost". This happens if:
     // - The restored geometry is completely oustside the available geometry
     // - The title bar is outside the available geometry.
     // - (Mac only) The window is higher than the available geometry. It must
     //   be possible to bring the size grip on screen by moving the window.
 #ifdef Q_WS_MAC
     restoredFrameGeometry.setHeight(qMin(restoredFrameGeometry.height(), availableGeometry.height()));
     restoredNormalGeometry.setHeight(qMin(restoredNormalGeometry.height(), availableGeometry.height() - frameHeight));
 #endif
 
     if (!restoredFrameGeometry.intersects(availableGeometry)) {
         restoredFrameGeometry.moveBottom(qMin(restoredFrameGeometry.bottom(), availableGeometry.bottom()));
         restoredFrameGeometry.moveLeft(qMax(restoredFrameGeometry.left(), availableGeometry.left()));
         restoredFrameGeometry.moveRight(qMin(restoredFrameGeometry.right(), availableGeometry.right()));
     }
     restoredFrameGeometry.moveTop(qMax(restoredFrameGeometry.top(), availableGeometry.top()));
 
     if (!restoredNormalGeometry.intersects(availableGeometry)) {
         restoredNormalGeometry.moveBottom(qMin(restoredNormalGeometry.bottom(), availableGeometry.bottom()));
         restoredNormalGeometry.moveLeft(qMax(restoredNormalGeometry.left(), availableGeometry.left()));
         restoredNormalGeometry.moveRight(qMin(restoredNormalGeometry.right(), availableGeometry.right()));
     }
     restoredNormalGeometry.moveTop(qMax(restoredNormalGeometry.top(), availableGeometry.top() + frameHeight));
 
     if (maximized || fullScreen) {
         // set geomerty before setting the window state to make
         // sure the window is maximized to the right screen.
         Qt::WindowStates ws = windowState();
 #ifndef Q_WS_WIN
         setGeometry(restoredNormalGeometry);
 #else
         if (ws & Qt::WindowFullScreen) {
             // Full screen is not a real window state on Windows.
             move(availableGeometry.topLeft());
         } else if (ws & Qt::WindowMaximized) {
             // Setting a geometry on an already maximized window causes this to be
             // restored into a broken, half-maximized state, non-resizable state (QTBUG-4397).
             // Move the window in normal state if needed.
             if (restoredScreenNumber != desktop->screenNumber(this)) {
                 setWindowState(Qt::WindowNoState);
                 setGeometry(restoredNormalGeometry);
             }
         } else {
             setGeometry(restoredNormalGeometry);
         }
 #endif // Q_WS_WIN
         if (maximized)
             ws |= Qt::WindowMaximized;
         if (fullScreen)
             ws |= Qt::WindowFullScreen;
        setWindowState(ws);
        d_func()->topData()->normalGeometry = restoredNormalGeometry;
     } else {
         QPoint offset;
 #ifdef Q_WS_X11
         if (isFullScreen())
             offset = d_func()->topData()->fullScreenOffset;
 #endif
         setWindowState(windowState() & ~(Qt::WindowMaximized | Qt::WindowFullScreen));
         move(restoredFrameGeometry.topLeft() + offset);
         resize(restoredNormalGeometry.size());
     }
     return true;
 }

◆ saveGeometry()

QByteArray QWidget::saveGeometry ( ) const

Saves the current geometry and state for top-level widgets.

Since: 4.2

To save the geometry when the window closes, you can implement a close event like this:

void MyWidget::closeEvent(QCloseEvent *event)
{
    QSettings settings("MyCompany", "MyApp");
    settings.setValue("geometry", saveGeometry());
    QWidget::closeEvent(event);
}

See the Window Geometry documentation for an overview of geometry issues with windows.

Use QMainWindow::saveState() to save the geometry and the state of toolbars and dock widgets.

See also: restoreGeometry(), QMainWindow::saveState(), QMainWindow::restoreState()

Definition at line 7251 of file qwidget.cpp.

 {
 #ifdef QT_MAC_USE_COCOA
     // We check if the window was maximized during this invocation. If so, we need to record the
     // starting position as 0,0.
     Q_D(const QWidget);
     QRect newFramePosition = frameGeometry();
     QRect newNormalPosition = normalGeometry();
     if(d->topData()->wasMaximized && !(windowState() & Qt::WindowMaximized)) {
         // Change the starting position
         newFramePosition.moveTo(0, 0);
         newNormalPosition.moveTo(0, 0);
     }
 #endif // QT_MAC_USE_COCOA
     QByteArray array;
     QDataStream stream(&array, QIODevice::WriteOnly);
     stream.setVersion(QDataStream::Qt_4_0);
     const quint32 magicNumber = 0x1D9D0CB;
     quint16 majorVersion = 1;
     quint16 minorVersion = 0;
     stream << magicNumber
            << majorVersion
            << minorVersion
 #ifdef QT_MAC_USE_COCOA
            << newFramePosition
            << newNormalPosition
 #else
            << frameGeometry()
            << normalGeometry()
 #endif // QT_MAC_USE_COCOA
            << qint32(QApplication::desktop()->screenNumber(this))
            << quint8(windowState() & Qt::WindowMaximized)
            << quint8(windowState() & Qt::WindowFullScreen);
     return array;
 }

◆ scroll() [1/2]

void QWidget::scroll	(	int	dx,
		int	dy
	)

Scrolls the widget including its children dx pixels to the right and dy downward.

Both dx and dy may be negative.

After scrolling, the widgets will receive paint events for the areas that need to be repainted. For widgets that Qt knows to be opaque, this is only the newly exposed parts. For example, if an opaque widget is scrolled 8 pixels to the left, only an 8-pixel wide stripe at the right edge needs updating.

Since widgets propagate the contents of their parents by default, you need to set the autoFillBackground property, or use setAttribute() to set the Qt::WA_OpaquePaintEvent attribute, to make a widget opaque.

For widgets that use contents propagation, a scroll will cause an update of the entire scroll area.

See also: {Transparency and Double Buffering}

Definition at line 10684 of file qwidget.cpp.

Referenced by QMdiArea::scrollContentsBy(), QGraphicsView::scrollContentsBy(), and QScriptEdit::updateExtraArea().

 {
     if ((!updatesEnabled() && children().size() == 0) || !isVisible())
         return;
     if (dx == 0 && dy == 0)
         return;
     Q_D(QWidget);
 #ifndef QT_NO_GRAPHICSVIEW
     if (QGraphicsProxyWidget *proxy = QWidgetPrivate::nearestGraphicsProxyWidget(this)) {
         // Graphics View maintains its own dirty region as a list of rects;
         // until we can connect item updates directly to the view, we must
         // separately add a translated dirty region.
         if (!d->dirty.isEmpty()) {
             foreach (const QRect &rect, (d->dirty.translated(dx, dy)).rects())
                 proxy->update(rect);
         }
         proxy->scroll(dx, dy, proxy->subWidgetRect(this));
         return;
     }
 #endif
     d->setDirtyOpaqueRegion();
     d->scroll_sys(dx, dy);
 }

◆ scroll() [2/2]

void QWidget::scroll	(	int	dx,
		int	dy,
		const QRect &	r
	)

This version only scrolls r and does not move the children of the widget.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

If r is empty or invalid, the result is undefined.

See also: QScrollArea

Definition at line 10721 of file qwidget.cpp.

 {
 
     if ((!updatesEnabled() && children().size() == 0) || !isVisible())
         return;
     if (dx == 0 && dy == 0)
         return;
     Q_D(QWidget);
 #ifndef QT_NO_GRAPHICSVIEW
     if (QGraphicsProxyWidget *proxy = QWidgetPrivate::nearestGraphicsProxyWidget(this)) {
         // Graphics View maintains its own dirty region as a list of rects;
         // until we can connect item updates directly to the view, we must
         // separately add a translated dirty region.
         if (!d->dirty.isEmpty()) {
             foreach (const QRect &rect, (d->dirty.translated(dx, dy) & r).rects())
                 proxy->update(rect);
         }
         proxy->scroll(dx, dy, r.translated(proxy->subWidgetRect(this).topLeft().toPoint()));
         return;
     }
 #endif
     d->scroll_sys(dx, dy, r);
 }

◆ setAcceptDrops()

void QWidget::setAcceptDrops ( bool on )

Definition at line 3534 of file qwidget.cpp.

Referenced by QColorShowLabel::QColorShowLabel(), QGraphicsView::QGraphicsView(), QX11EmbedContainer::QX11EmbedContainer(), QAbstractItemView::setDragDropMode(), QGraphicsView::setupViewport(), and QListView::setViewMode().

 {
     setAttribute(Qt::WA_AcceptDrops, on);
 
 }

◆ setAccessibleDescription()

void QWidget::setAccessibleDescription ( const QString & description )

Definition at line 11709 of file qwidget.cpp.

 {
     Q_D(QWidget);
     d->accessibleDescription = description;
     QAccessible::updateAccessibility(this, 0, QAccessible::DescriptionChanged);
 }

◆ setAccessibleName()

void QWidget::setAccessibleName ( const QString & name )

Definition at line 11684 of file qwidget.cpp.

 {
     Q_D(QWidget);
     d->accessibleName = name;
     QAccessible::updateAccessibility(this, 0, QAccessible::NameChanged);
 }

◆ setAttribute()

void QWidget::setAttribute	(	Qt::WidgetAttribute	attribute,
		bool	on = `true`
	)

Sets the attribute attribute on this widget if on is true; otherwise clears the attribute.

See also: testAttribute()

Definition at line 11087 of file qwidget.cpp.

Referenced by QGroupBoxPrivate::_q_setChildrenEnabled(), QMessageBox::about(), QMessageBox::aboutQt(), QMenu::actionEvent(), QWidgetPrivate::activateChildLayoutsRecursively(), QMenuPrivate::QMacMenuPrivate::addAction(), QLayout::addChildWidget(), QMdiArea::addSubWindow(), QGroupBox::childEvent(), QMessageBoxDetailsText::TextEdit::contextMenuEvent(), QLabel::contextMenuEvent(), QTextControlPrivate::contextMenuEvent(), QMainWindow::contextMenuEvent(), create(), QToolBarLayout::createItem(), PvrEglScreenSurfaceFunctions::createNativeWindow(), QWidgetPrivate::createWinId(), destroy(), do_size_hints(), QGraphicsScenePrivate::enableTouchEventsOnViews(), QDialog::event(), QMdiSubWindow::event(), QAbstractButton::event(), QLabel::event(), event(), QSizeGrip::eventFilter(), QDialog::exec(), QAbstractItemView::focusInEvent(), QApplicationPrivate::focusNextPrevChild_helper(), QMainWindowLayout::getSeparatorWidget(), grabShortcut(), QWidgetPrivate::hideChildren(), QStatusBar::hideOrShow(), QColumnView::initializeColumn(), make_widget_eventUPP(), QCalendarWidget::mousePressEvent(), QMenu::mousePressEvent(), QCalendarPopup::mousePressEvent(), QComboBoxPrivateContainer::mousePressEvent(), move(), nativeParentWidget(), QApplication::notify(), QApplicationPrivate::notify_helper(), QDialog::open(), QGtkStylePrivate::openDirectory(), QGtkStylePrivate::openFilename(), QGtkStylePrivate::openFilenames(), QPrintDialogPrivate::openWindowsPrintDialogModally(), QWindowsXPStyle::polish(), QMacStyle::polish(), QWindowsVistaStyle::polish(), QPlastiqueStyle::polish(), QCleanlooksStyle::polish(), QStyleSheetStyle::polish(), QGtkStyle::polish(), QMenu::popup(), QAlphaWidget::QAlphaWidget(), QAxHostWidget::QAxHostWidget(), QBalloonTip::QBalloonTip(), QCalendarPopup::QCalendarPopup(), QColorPicker::QColorPicker(), QComboBoxPrivateContainer::QComboBoxPrivateContainer(), QComboBoxPrivateScroller::QComboBoxPrivateScroller(), QDesktopWidget::QDesktopWidget(), QDialog::QDialog(), QFocusFrame::QFocusFrame(), QGLOverlayWidget::QGLOverlayWidget(), QGraphicsView::QGraphicsView(), QListView::QListView(), QMacCocoaViewContainer::QMacCocoaViewContainer(), QMacNativeWidget::QMacNativeWidget(), QMdiSubWindow::QMdiSubWindow(), QPageSetupWidget::QPageSetupWidget(), qPRCleanup(), qPRCreate(), QRollEffect::QRollEffect(), QRubberBand::QRubberBand(), QShapedPixmapWidget::QShapedPixmapWidget(), qt_mac_unregister_widget(), qt_win_get_existing_directory(), qt_win_get_open_file_name(), qt_win_get_open_file_names(), qt_win_get_save_file_name(), QTornOffMenu::QTornOffMenu(), QWhatsThat::QWhatsThat(), QWorkspaceChild::QWorkspaceChild(), QX11EmbedContainer::QX11EmbedContainer(), QX11EmbedWidget::QX11EmbedWidget(), QAlphaWidget::render(), resize(), QSplitterHandle::resizeEvent(), QAlphaWidget::run(), QRollEffect::run(), QGtkStylePrivate::saveFilename(), QRollEffect::scroll(), setAcceptDrops(), setAttribute(), QWorkspace::setBackground(), QDateTimeEdit::setCalendarPopup(), setContentsMargins(), setCursor(), QComboBox::setEditable(), setEnabled(), QDockWidget::setFloating(), QMacStyle::setFocusRectPolicy(), QApplicationPrivate::setFocusWidget(), setFont(), QFrame::setFrameStyle(), setGeometry(), QComboBoxPrivateContainer::setItemView(), setLayoutDirection(), QComboBox::setLineEdit(), setLocale(), setMaximumSize(), setMinimumSize(), QDialog::setModal(), QSplitter::setOrientation(), QProgressBar::setOrientation(), QAbstractSlider::setOrientation(), setPalette(), setParent(), QWidgetPrivate::setParent_sys(), QSplashScreen::setPixmap(), QPlainTextEdit::setReadOnly(), QLineEdit::setReadOnly(), QTextEdit::setReadOnly(), QDeclarativeView::setRootObject(), setSizePolicy(), setStyle(), setUpdatesEnabled(), QMdiArea::setupViewport(), QGraphicsView::setupViewport(), QDialog::setVisible(), QColorDialog::setVisible(), QFontDialog::setVisible(), setVisible(), QMdiSubWindow::setWidget(), QGraphicsProxyWidgetPrivate::setWidget_helper(), QMacStyle::setWidgetSizePolicy(), setWindowIcon(), setWindowModality(), setWindowModified(), setWindowOpacity(), QWidgetPrivate::showChildren(), QDialog::showEvent(), QWidgetBackingStore::showYellowThing(), QSystemTrayIconSys::sysTrayTracker(), QAxServerBase::TranslateAcceleratorW(), QApplicationPrivate::translateRawTouchEvent(), QStatusBarPrivate::tryToShowSizeGrip(), QWindowsXPStyle::unpolish(), QMacStyle::unpolish(), QWindowsVistaStyle::unpolish(), QPlastiqueStyle::unpolish(), QCleanlooksStyle::unpolish(), QStyleSheetStyle::unpolish(), unsetCursor(), unsetLayoutDirection(), unsetLocale(), winId(), and QApplication::x11ProcessEvent().

 {
     if (testAttribute(attribute) == on)
         return;
 
     Q_D(QWidget);
     Q_ASSERT_X(sizeof(d->high_attributes)*8 >= (Qt::WA_AttributeCount - sizeof(uint)*8),
                "QWidget::setAttribute(WidgetAttribute, bool)",
                "QWidgetPrivate::high_attributes[] too small to contain all attributes in WidgetAttribute");
 #ifdef Q_WS_WIN
     // ### Don't use PaintOnScreen+paintEngine() to do native painting in 5.0
     if (attribute == Qt::WA_PaintOnScreen && on && !inherits("QGLWidget")) {
         // see qwidget_win.cpp, ::paintEngine for details
         paintEngine();
         if (d->noPaintOnScreen)
             return;
     }
 #endif
 
     setAttribute_internal(attribute, on, data, d);
 
     switch (attribute) {
 
 #ifndef QT_NO_DRAGANDDROP
     case Qt::WA_AcceptDrops:  {
         if (on && !testAttribute(Qt::WA_DropSiteRegistered))
             setAttribute(Qt::WA_DropSiteRegistered, true);
         else if (!on && (isWindow() || !parentWidget() || !parentWidget()->testAttribute(Qt::WA_DropSiteRegistered)))
             setAttribute(Qt::WA_DropSiteRegistered, false);
         QEvent e(QEvent::AcceptDropsChange);
         QApplication::sendEvent(this, &e);
         break;
     }
     case Qt::WA_DropSiteRegistered:  {
         d->registerDropSite(on);
         for (int i = 0; i < d->children.size(); ++i) {
             QWidget *w = qobject_cast<QWidget *>(d->children.at(i));
             if (w && !w->isWindow() && !w->testAttribute(Qt::WA_AcceptDrops) && w->testAttribute(Qt::WA_DropSiteRegistered) != on)
                 w->setAttribute(Qt::WA_DropSiteRegistered, on);
         }
         break;
     }
 #endif
 
     case Qt::WA_NoChildEventsForParent:
         d->sendChildEvents = !on;
         break;
     case Qt::WA_NoChildEventsFromChildren:
         d->receiveChildEvents = !on;
         break;
     case Qt::WA_MacBrushedMetal:
 #ifdef Q_WS_MAC
         d->setStyle_helper(style(), false, true);  // Make sure things get unpolished/polished correctly.
         // fall through since changing the metal attribute affects the opaque size grip.
     case Qt::WA_MacOpaqueSizeGrip:
         d->macUpdateOpaqueSizeGrip();
         break;
     case Qt::WA_MacShowFocusRect:
         if (hasFocus()) {
             clearFocus();
             setFocus();
         }
         break;
     case Qt::WA_Hover:
         qt_mac_update_mouseTracking(this);
         break;
 #endif
     case Qt::WA_MacAlwaysShowToolWindow:
 #ifdef Q_WS_MAC
         d->macUpdateHideOnSuspend();
 #endif
         break;
     case Qt::WA_MacNormalSize:
     case Qt::WA_MacSmallSize:
     case Qt::WA_MacMiniSize:
 #ifdef Q_WS_MAC
         {
             // We can only have one of these set at a time
             const Qt::WidgetAttribute MacSizes[] = { Qt::WA_MacNormalSize, Qt::WA_MacSmallSize,
                                                      Qt::WA_MacMiniSize };
             for (int i = 0; i < 3; ++i) {
                 if (MacSizes[i] != attribute)
                     setAttribute_internal(MacSizes[i], false, data, d);
             }
             d->macUpdateSizeAttribute();
         }
 #endif
         break;
     case Qt::WA_ShowModal:
         if (!on) {
             if (isVisible())
                 QApplicationPrivate::leaveModal(this);
             // reset modality type to Modeless when clearing WA_ShowModal
             data->window_modality = Qt::NonModal;
         } else if (data->window_modality == Qt::NonModal) {
             // determine the modality type if it hasn't been set prior
             // to setting WA_ShowModal. set the default to WindowModal
             // if we are the child of a group leader; otherwise use
             // ApplicationModal.
             QWidget *w = parentWidget();
             if (w)
                 w = w->window();
             while (w && !w->testAttribute(Qt::WA_GroupLeader)) {
                 w = w->parentWidget();
                 if (w)
                     w = w->window();
             }
             data->window_modality = (w && w->testAttribute(Qt::WA_GroupLeader))
                                     ? Qt::WindowModal
                                     : Qt::ApplicationModal;
             // Some window managers does not allow us to enter modal after the
             // window is showing. Therefore, to be consistent, we cannot call
             // QApplicationPrivate::enterModal(this) here. The window must be
             // hidden before changing modality.
         }
         if (testAttribute(Qt::WA_WState_Created)) {
             // don't call setModal_sys() before create_sys()
             d->setModal_sys();
         }
         break;
     case Qt::WA_MouseTracking: {
         QEvent e(QEvent::MouseTrackingChange);
         QApplication::sendEvent(this, &e);
         break; }
     case Qt::WA_NativeWindow: {
 #ifndef QT_NO_IM
         QWidget *focusWidget = d->effectiveFocusWidget();
         QInputContext *ic = 0;
         if (on && !internalWinId() && hasFocus()
             && focusWidget->testAttribute(Qt::WA_InputMethodEnabled)) {
             ic = focusWidget->d_func()->inputContext();
             if (ic) {
                 ic->reset();
                 ic->setFocusWidget(0);
             }
         }
         if (!qApp->testAttribute(Qt::AA_DontCreateNativeWidgetSiblings) && parentWidget()
 #if defined(Q_WS_MAC) && defined(QT_MAC_USE_COCOA)
             // On Mac, toolbars inside the unified title bar will never overlap with
             // siblings in the content view. So we skip enforce native siblings in that case
             && !d->isInUnifiedToolbar && parentWidget()->isWindow()
 #endif // Q_WS_MAC && QT_MAC_USE_COCOA
         )
             parentWidget()->d_func()->enforceNativeChildren();
         if (on && !internalWinId() && testAttribute(Qt::WA_WState_Created))
             d->createWinId();
         if (ic && isEnabled() && focusWidget->isEnabled()
             && focusWidget->testAttribute(Qt::WA_InputMethodEnabled)) {
             ic->setFocusWidget(focusWidget);
         }
 #endif //QT_NO_IM
         break;
     }
     case Qt::WA_PaintOnScreen:
         d->updateIsOpaque();
 #if defined(Q_WS_WIN) || defined(Q_WS_X11) || defined(Q_WS_MAC) || defined(Q_OS_SYMBIAN)
         // Recreate the widget if it's already created as an alien widget and
         // WA_PaintOnScreen is enabled. Paint on screen widgets must have win id.
         // So must their children.
         if (on) {
             setAttribute(Qt::WA_NativeWindow);
             d->enforceNativeChildren();
         }
 #endif
         // fall through
     case Qt::WA_OpaquePaintEvent:
         d->updateIsOpaque();
         break;
     case Qt::WA_NoSystemBackground:
         d->updateIsOpaque();
         // fall through...
     case Qt::WA_UpdatesDisabled:
         d->updateSystemBackground();
         break;
     case Qt::WA_TransparentForMouseEvents:
 #ifdef Q_WS_MAC
         d->macUpdateIgnoreMouseEvents();
 #endif
         break;
     case Qt::WA_InputMethodEnabled: {
 #ifndef QT_NO_IM
         QWidget *focusWidget = d->effectiveFocusWidget();
         QInputContext *ic = focusWidget->d_func()->assignedInputContext();
         if (!ic && (!on || hasFocus()))
             ic = focusWidget->d_func()->inputContext();
         if (ic) {
             if (on && hasFocus() && ic->focusWidget() != focusWidget && isEnabled()
                 && focusWidget->testAttribute(Qt::WA_InputMethodEnabled)) {
                 ic->setFocusWidget(focusWidget);
             } else if (!on && ic->focusWidget() == focusWidget) {
                 ic->reset();
                 ic->setFocusWidget(0);
             }
         }
 #endif //QT_NO_IM
         break;
     }
     case Qt::WA_WindowPropagation:
         d->resolvePalette();
         d->resolveFont();
         d->resolveLocale();
         break;
 #ifdef Q_WS_X11
     case Qt::WA_NoX11EventCompression:
         if (!d->extra)
             d->createExtra();
         d->extra->compress_events = on;
         break;
     case Qt::WA_X11OpenGLOverlay:
         d->updateIsOpaque();
         break;
     case Qt::WA_X11DoNotAcceptFocus:
         if (testAttribute(Qt::WA_WState_Created))
             d->updateX11AcceptFocus();
         break;
 #endif
     case Qt::WA_DontShowOnScreen: {
         if (on && isVisible()) {
             // Make sure we keep the current state and only hide the widget
             // from the desktop. show_sys will only update platform specific
             // attributes at this point.
             d->hide_sys();
 #ifdef Q_WS_QWS
             // Release the region for this window from qws if the widget has
             // been shown before the attribute was set.
             if (QWSWindowSurface *surface = static_cast<QWSWindowSurface *>(windowSurface())) {
                 QWidget::qwsDisplay()->requestRegion(surface->winId(), surface->key(),
                                                      surface->permanentState(), QRegion());
             }
 #endif
             d->show_sys();
         }
         break;
     }
 
 #ifdef Q_WS_X11
     case Qt::WA_X11NetWmWindowTypeDesktop:
     case Qt::WA_X11NetWmWindowTypeDock:
     case Qt::WA_X11NetWmWindowTypeToolBar:
     case Qt::WA_X11NetWmWindowTypeMenu:
     case Qt::WA_X11NetWmWindowTypeUtility:
     case Qt::WA_X11NetWmWindowTypeSplash:
     case Qt::WA_X11NetWmWindowTypeDialog:
     case Qt::WA_X11NetWmWindowTypeDropDownMenu:
     case Qt::WA_X11NetWmWindowTypePopupMenu:
     case Qt::WA_X11NetWmWindowTypeToolTip:
     case Qt::WA_X11NetWmWindowTypeNotification:
     case Qt::WA_X11NetWmWindowTypeCombo:
     case Qt::WA_X11NetWmWindowTypeDND:
         if (testAttribute(Qt::WA_WState_Created))
             d->setNetWmWindowTypes();
         break;
 #endif
 
     case Qt::WA_StaticContents:
         if (QWidgetBackingStore *bs = d->maybeBackingStore()) {
             if (on)
                 bs->addStaticWidget(this);
             else
                 bs->removeStaticWidget(this);
         }
         break;
     case Qt::WA_TranslucentBackground:
 #if defined(Q_OS_SYMBIAN)
         setAttribute(Qt::WA_NoSystemBackground, on);
 #else
         if (on) {
             setAttribute(Qt::WA_NoSystemBackground);
             d->updateIsTranslucent();
         }
 #endif
         break;
     case Qt::WA_AcceptTouchEvents:
 #if defined(Q_WS_WIN) || defined(Q_WS_MAC) || defined(Q_OS_SYMBIAN)
         if (on)
             d->registerTouchWindow();
 #endif
         break;
     case Qt::WA_LockPortraitOrientation:
     case Qt::WA_LockLandscapeOrientation:
     case Qt::WA_AutoOrientation: {
         const Qt::WidgetAttribute orientations[3] = {
             Qt::WA_LockPortraitOrientation,
             Qt::WA_LockLandscapeOrientation,
             Qt::WA_AutoOrientation
         };
 
         if (on) {
             // We can only have one of these set at a time
             for (int i = 0; i < 3; ++i) {
                 if (orientations[i] != attribute)
                     setAttribute_internal(orientations[i], false, data, d);
             }
         }
 
 #ifdef Q_OS_BLACKBERRY
         if (testAttribute(Qt::WA_AutoOrientation)) {
             navigator_rotation_lock(false);
         } else {
 #ifdef Q_OS_BLACKBERRY_TABLET
             const bool portraitLocked = testAttribute(Qt::WA_LockPortraitOrientation);
 
             orientation_direction_t direction;
             orientation_get(&direction, 0);
 
             int rotation = 0;
 
             switch (direction) {
             case ORIENTATION_TOP_UP:
             case ORIENTATION_RIGHT_UP:
                 rotation = portraitLocked ? 90 : 0;
                 break;
             case ORIENTATION_BOTTOM_UP:
             case ORIENTATION_LEFT_UP:
                 rotation = portraitLocked ? 270 : 180;
                 break;
             default:
                 break;
             }
 
             navigator_set_orientation(rotation, 0);
 #else
             navigator_set_orientation_mode((testAttribute(Qt::WA_LockPortraitOrientation) ?
                                             NAVIGATOR_PORTRAIT : NAVIGATOR_LANDSCAPE), 0);
 #endif // Q_OS_BLACKBERRY_TABLET
             navigator_rotation_lock(true);
         }
 #endif // Q_OS_BLACKBERRY
 
 #ifdef Q_WS_S60
         CAknAppUiBase* appUi = static_cast<CAknAppUiBase*>(CEikonEnv::Static()->EikAppUi());
         const CAknAppUiBase::TAppUiOrientation s60orientations[] = {
             CAknAppUiBase::EAppUiOrientationPortrait,
             CAknAppUiBase::EAppUiOrientationLandscape,
             CAknAppUiBase::EAppUiOrientationAutomatic
         };
         CAknAppUiBase::TAppUiOrientation s60orientation = CAknAppUiBase::EAppUiOrientationUnspecified;
         for (int i = 0; i < 3; ++i) {
             if (testAttribute(orientations[i])) {
                 s60orientation = s60orientations[i];
                 break;
             }
         }
         QT_TRAP_THROWING(appUi->SetOrientationL(s60orientation));
         S60->orientationSet = true;
         QSymbianControl *window = static_cast<QSymbianControl *>(internalWinId());
         if (window)
             window->ensureFixNativeOrientation();
 #endif
         break;
     }
     default:
         break;
     }
 }

◆ setAutoFillBackground()

void QWidget::setAutoFillBackground ( bool enabled )

Definition at line 631 of file qwidget.cpp.

Referenced by QWorkspace::addWindow(), QCalendarWidgetPrivate::createNavigationBar(), QMainWindowLayout::getSeparatorWidget(), QStyleSheetStyle::polish(), QCalendarWidget::QCalendarWidget(), QMdiSubWindow::QMdiSubWindow(), QWorkspaceChild::QWorkspaceChild(), QWizardPrivate::recreateLayout(), QGraphicsView::setupViewport(), and QStyleSheetStyle::unsetPalette().

 {
     Q_D(QWidget);
     if (!d->extra)
         d->createExtra();
     if (d->extra->autoFillBackground == enabled)
         return;
 
     d->extra->autoFillBackground = enabled;
     d->updateIsOpaque();
     update();
     d->updateIsOpaque();
 }

◆ setBackgroundRole()

void QWidget::setBackgroundRole ( QPalette::ColorRole role )

Sets the background role of the widget to role.

The background role defines the brush from the widget's palette that is used to render the background.

If role is QPalette::NoRole, then the widget inherits its parent's background role.

Note that styles are free to choose any color from the palette. You can modify the palette or set a style sheet if you don't achieve the result you want with setBackgroundRole().

See also: backgroundRole(), foregroundRole()

Definition at line 4708 of file qwidget.cpp.

Referenced by QCalendarWidgetPrivate::createNavigationBar(), QTextEditPrivate::init(), QAbstractItemViewPrivate::init(), QPlainTextEditPrivate::init(), nativeParentWidget(), QToolBoxButton::paintEvent(), QPlastiqueStyle::polish(), QCalendarWidget::QCalendarWidget(), QGraphicsView::QGraphicsView(), QMdiSubWindow::QMdiSubWindow(), QTipLabel::QTipLabel(), QToolBox::QToolBox(), QToolBoxButton::QToolBoxButton(), QWizardHeader::QWizardHeader(), QWorkspaceChild::QWorkspaceChild(), QWizardPrivate::recreateLayout(), QPlastiqueStyle::unpolish(), and QToolBoxPrivate::updateTabs().

 {
     Q_D(QWidget);
     d->bg_role = role;
     d->updateSystemBackground();
     d->propagatePaletteChange();
     d->updateIsOpaque();
 }

◆ setBaseSize() [1/2]

void QWidget::setBaseSize ( const QSize & s )

inline

Definition at line 978 of file qwidget.h.

Referenced by QWorkspaceChild::QWorkspaceChild().

979 { setBaseSize(s.width(),s.height()); }

QWidget::setBaseSize

void setBaseSize(const QSize &)

Definition: qwidget.h:978

int width() const

Returns the width.

Definition: qsize.h:126

Referenced by QTextBrowserPrivate::_q_activateAnchor(), QTextBrowserPrivate::_q_highlightLink(), QGraphicsViewPrivate::_q_setViewportCursor(), QGraphicsViewPrivate::_q_unsetViewportCursor(), QmlJSDebugger::ColorPickerTool::clear(), QmlJSDebugger::ZoomTool::clear(), QmlJSDebugger::LiveSelectionTool::clear(), CloseButton::CloseButton(), QToolBar::event(), QScriptEdit::extraAreaMouseEvent(), QTextBrowserPrivate::init(), QTextEditPrivate::init(), QPlainTextEditPrivate::init(), QWorkspaceChild::leaveEvent(), QHeaderView::mouseDoubleClickEvent(), QWhatsThat::mouseMoveEvent(), QHeaderView::mouseMoveEvent(), QGraphicsViewPrivate::mouseMoveEventHandler(), QGraphicsView::mousePressEvent(), QGraphicsView::mouseReleaseEvent(), QSizeGrip::moveEvent(), QColumnViewGrip::QColumnViewGrip(), QWhatsThat::QWhatsThat(), QProgressDialog::reset(), QGraphicsView::setDragMode(), QVistaHelper::setMouseCursor(), QWidgetResizeHandler::setMouseCursor(), QSplitterHandle::setOrientation(), and QLineEdit::setReadOnly().

int height() const

Returns the height.

Definition: qsize.h:129

◆ setBaseSize() [2/2]

void QWidget::setBaseSize	(	int	basew,
		int	baseh
	)

This corresponds to setBaseSize(QSize(basew, baseh)).

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Sets the widgets base size to width basew and height baseh.

Definition at line 4256 of file qwidget.cpp.

 {
     Q_D(QWidget);
     d->createTLExtra();
     QTLWExtra* x = d->topData();
     if (x->basew == basew && x->baseh == baseh)
         return;
     x->basew = basew;
     x->baseh = baseh;
     if (isWindow())
         d->setConstraints_sys();
 }

◆ setContentsMargins() [1/2]

void QWidget::setContentsMargins	(	int	left,
		int	top,
		int	right,
		int	bottom
	)

Sets the margins around the contents of the widget to have the sizes left, top, right, and bottom.

The margins are used by the layout system, and may be used by subclasses to specify the area to draw in (e.g. excluding the frame).

Changing the margins will trigger a resizeEvent().

See also: contentsRect(), getContentsMargins()

Definition at line 7449 of file qwidget.cpp.

Referenced by QBalloonTip::balloon(), QMdiSubWindow::event(), QWindowsVistaStyle::polish(), QWorkspaceChild::QWorkspaceChild(), QWizardPrivate::recreateLayout(), QSplitterHandle::resizeEvent(), setContentsMargins(), QFrame::setFrameRect(), QMessageBox::setInformativeText(), and QWindowsVistaStyle::unpolish().

 {
     Q_D(QWidget);
     if (left == d->leftmargin && top == d->topmargin
          && right == d->rightmargin && bottom == d->bottommargin)
         return;
     d->leftmargin = left;
     d->topmargin = top;
     d->rightmargin = right;
     d->bottommargin = bottom;
 
     if (QLayout *l=d->layout)
         l->update(); //force activate; will do updateGeometry
     else
         updateGeometry();
 
     // ### Qt 5: compat, remove
     if (isVisible()) {
         update();
         QResizeEvent e(data->crect.size(), data->crect.size());
         QApplication::sendEvent(this, &e);
     } else {
         setAttribute(Qt::WA_PendingResizeEvent, true);
     }
 
     QEvent e(QEvent::ContentsRectChange);
     QApplication::sendEvent(this, &e);
 }

◆ setContentsMargins() [2/2]

void QWidget::setContentsMargins ( const QMargins & margins )

The setContentsMargins function sets the margins around the widget's contents.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Since: 4.6

Sets the margins around the contents of the widget to have the sizes determined by margins. The margins are used by the layout system, and may be used by subclasses to specify the area to draw in (e.g. excluding the frame).

Changing the margins will trigger a resizeEvent().

See also: contentsRect(), getContentsMargins()

Definition at line 7497 of file qwidget.cpp.

 {
     setContentsMargins(margins.left(), margins.top(),
                        margins.right(), margins.bottom());
 }

◆ setContextMenuPolicy()

void QWidget::setContextMenuPolicy ( Qt::ContextMenuPolicy policy )

Definition at line 7596 of file qwidget.cpp.

Referenced by QFileDialogPrivate::createWidgets(), QSidebar::init(), QFileDialogListView::init(), and QFileDialogTreeView::init().

 {
     data->context_menu_policy = (uint) policy;
 }

◆ setCursor()

void QWidget::setCursor ( const QCursor & cursor )

Definition at line 5290 of file qwidget.cpp.

 {
     Q_D(QWidget);
 // On Mac we must set the cursor even if it is the ArrowCursor.
 #if !defined(Q_WS_MAC) && !defined(Q_WS_QWS)
     if (cursor.shape() != Qt::ArrowCursor
         || (d->extra && d->extra->curs))
 #endif
     {
         d->createExtra();
         QCursor *newCursor = new QCursor(cursor);
         delete d->extra->curs;
         d->extra->curs = newCursor;
     }
     setAttribute(Qt::WA_SetCursor);
     d->setCursor_sys(cursor);
 
     QEvent event(QEvent::CursorChange);
     QApplication::sendEvent(this, &event);
 }

◆ setDisabled

void QWidget::setDisabled ( bool disable )

slot

Disables widget input events if disable is true; otherwise enables input events.

See the enabled documentation for more information.

See also: isEnabledTo(), QKeyEvent, QMouseEvent, changeEvent()

Definition at line 3589 of file qwidget.cpp.

 {
     setEnabled(!disable);
 }

◆ setEnabled

void QWidget::setEnabled ( bool enable )

slot

Definition at line 3447 of file qwidget.cpp.

Referenced by QInputDialogPrivate::_q_currentRowChanged(), QPrintDialogPrivate::_q_printerOrFileSelected(), QPrintDialogPrivate::_q_printRangeSelected(), QGroupBoxPrivate::_q_setChildrenEnabled(), QScriptDebuggerCodeFinderWidgetPrivate::_q_updateButtons(), QFileDialogPrivate::_q_updateOkButton(), QX11EmbedContainerPrivate::acceptClient(), QGroupBox::childEvent(), QX11EmbedContainer::eventFilter(), QScriptDebuggerPrivate::handleResponse(), QToolBarLayout::layoutActions(), QTabBarPrivate::layoutTabs(), QTabBarPrivate::makeVisible(), QScriptNewBreakpointWidget::onTextChanged(), QAlphaWidget::QAlphaWidget(), QRollEffect::QRollEffect(), QScriptNewBreakpointWidget::QScriptNewBreakpointWidget(), QTornOffMenu::QTornOffMenu(), QX11EmbedContainer::QX11EmbedContainer(), QAlphaWidget::render(), QAlphaWidget::run(), QRollEffect::run(), QRollEffect::scroll(), QToolButton::setDefaultAction(), setDisabled(), QInputDialogPrivate::setInputWidget(), QToolBox::setItemEnabled(), QPrintDialogPrivate::setPrinter(), QTabWidget::setTabEnabled(), QCalendarWidgetPrivate::updateMonthMenu(), and QX11EmbedContainer::x11Event().

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_ForceDisabled, !enable);
     d->setEnabled_helper(enable);
 }

◆ setFixedHeight()

void QWidget::setFixedHeight ( int h )

Sets both the minimum and maximum heights of the widget to h without changing the widths.

Provided for convenience.

See also: sizeHint() minimumSize() maximumSize() setFixedSize()

Definition at line 4388 of file qwidget.cpp.

Referenced by QMessageBoxDetailsText::QMessageBoxDetailsText(), and QAxClientSite::qt_metacall().

 {
     Q_D(QWidget);
     d->createExtra();
     uint explMin = d->extra->explicitMinSize | Qt::Vertical;
     uint explMax = d->extra->explicitMaxSize | Qt::Vertical;
     setMinimumSize(minimumSize().width(), h);
     setMaximumSize(maximumSize().width(), h);
     d->extra->explicitMinSize = explMin;
     d->extra->explicitMaxSize = explMax;
 }

◆ setFixedSize() [1/2]

void QWidget::setFixedSize ( const QSize & s )

Sets both the minimum and maximum sizes of the widget to s, thereby preventing it from ever growing or shrinking.

This will override the default size constraints set by QLayout.

To remove constraints, set the size to QWIDGETSIZE_MAX.

Alternatively, if you want the widget to have a fixed size based on its contents, you can call QLayout::setSizeConstraint(QLayout::SetFixedSize);

See also: maximumSize, minimumSize

Definition at line 4284 of file qwidget.cpp.

Referenced by QTornOffMenu::actionEvent(), QLayout::activate(), QLayout::addChildWidget(), QMdi::ControlLabel::ControlLabel(), QDialogButtonBox::event(), QMessageBoxPrivate::hideSpecial(), QBalloonTip::QBalloonTip(), QMdiSubWindowPrivate::setSizeGrip(), QWizardHeader::setup(), and QDialog::showExtension().

 {
     setFixedSize(s.width(), s.height());
 }

◆ setFixedSize() [2/2]

void QWidget::setFixedSize	(	int	w,
		int	h
	)

Sets the width of the widget to w and the height to h.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 4300 of file qwidget.cpp.

 {
     Q_D(QWidget);
 #ifdef Q_WS_QWS
     // temporary fix for 4.3.x.
     // Should move the embedded spesific contraints in setMinimumSize_helper into QLayout
     int tmpW = w;
     int tmpH = h;
     bool minSizeSet = d->setMinimumSize_helper(tmpW, tmpH);
 #else
     bool minSizeSet = d->setMinimumSize_helper(w, h);
 #endif
     bool maxSizeSet = d->setMaximumSize_helper(w, h);
     if (!minSizeSet && !maxSizeSet)
         return;
 
     if (isWindow())
         d->setConstraints_sys();
     else
         d->updateGeometry_helper(true);
 
     if (w != QWIDGETSIZE_MAX || h != QWIDGETSIZE_MAX)
         resize(w, h);
 }

◆ setFixedWidth()

void QWidget::setFixedWidth ( int w )

Sets both the minimum and maximum width of the widget to w without changing the heights.

Provided for convenience.

See also: sizeHint() minimumSize() maximumSize() setFixedSize()

Definition at line 4368 of file qwidget.cpp.

Referenced by QFontComboBox::event(), and QAxClientSite::qt_metacall().

 {
     Q_D(QWidget);
     d->createExtra();
     uint explMin = d->extra->explicitMinSize | Qt::Horizontal;
     uint explMax = d->extra->explicitMaxSize | Qt::Horizontal;
     setMinimumSize(w, minimumSize().height());
     setMaximumSize(w, maximumSize().height());
     d->extra->explicitMinSize = explMin;
     d->extra->explicitMaxSize = explMax;
 }

◆ setFocus [1/2]

void QWidget::setFocus ( )

inlineslot

Gives the keyboard input focus to this widget (or its focus proxy) if this widget or one of its parents is the active window.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 432 of file qwidget.h.

Referenced by QColumnViewPrivate::_q_changeCurrentColumn(), QScriptDebuggerPrivate::_q_findInScript(), QGroupBoxPrivate::_q_fixFocus(), QPrintDialogPrivate::_q_printerOrFileSelected(), QCalendarWidgetPrivate::_q_yearClicked(), QAxServerBase::ActiveXProc(), QGraphicsScenePrivate::addPopup(), QMdiArea::addSubWindow(), QAbstractButton::animateClick(), QAbstractItemView::closeEditor(), QApplicationPrivate::closePopup(), QAccessibleWidget::doAction(), QColorWell::dragLeaveEvent(), QGroupBox::event(), QAbstractButton::event(), QLabel::event(), QStyledItemDelegate::eventFilter(), QItemDelegate::eventFilter(), QCalendarWidget::eventFilter(), QMenu::focusNextPrevChild(), focusNextPrevChild(), QWidgetPrivate::frameStrut(), QApplicationPrivate::giveFocusAccordingToFocusPolicy(), QMenu::keyPressEvent(), QFileDialogLineEdit::keyPressEvent(), QAbstractItemView::keyPressEvent(), QMdiSubWindowPrivate::leaveInteractiveMode(), make_widget_eventUPP(), QCalendarWidget::mousePressEvent(), QAbstractButtonPrivate::moveFocus(), QAbstractItemViewPrivate::openEditor(), QApplicationPrivate::openPopup(), qt_try_modal(), QApplication::qwsProcessEvent(), QAlphaWidget::render(), resetInputContext(), QMdiSubWindowPrivate::restoreFocus(), QRollEffect::scroll(), QWorkspaceChild::setActive(), QApplication::setActiveWindow(), setAttribute(), QCalendarPopup::setCalendarWidget(), QMenuBarPrivate::setCurrentAction(), QMenuPrivate::setCurrentAction(), QStackedLayout::setCurrentIndex(), QMessageBox::setDefaultButton(), setFocus(), QMdiSubWindowPrivate::setFocusWidget(), QWidgetPrivate::show_helper(), QComboBox::showPopup(), QWizardPrivate::switchToPage(), and QX11EmbedContainer::x11Event().

432 { setFocus(Qt::OtherFocusReason); }

Qt::OtherFocusReason

Definition: qnamespace.h:1529

QWidget::setFocus

void setFocus()

Gives the keyboard input focus to this widget (or its focus proxy) if this widget or one of its paren...

Definition: qwidget.h:432

◆ setFocus() [2/2]

void QWidget::setFocus ( Qt::FocusReason reason )

Gives the keyboard input focus to this widget (or its focus proxy) if this widget or one of its parents is the active window.

The reason argument will be passed into any focus event sent from this function, it is used to give an explanation of what caused the widget to get focus. If the window is not active, the widget will be given the focus when the window becomes active.

First, a focus out event is sent to the focus widget (if any) to tell it that it is about to lose the focus. Then a focus in event is sent to this widget to tell it that it just received the focus. (Nothing happens if the focus in and focus out widgets are the same.)

Note: On embedded platforms, setFocus() will not cause an input panel to be opened by the input method. If you want this to happen, you have to send a QEvent::RequestSoftwareInputPanel event to the widget yourself.

setFocus() gives focus to a widget regardless of its focus policy, but does not clear any keyboard grab (see grabKeyboard()).

Be aware that if the widget is hidden, it will not accept focus until it is shown.

Warning: If you call setFocus() in a function which may itself be called from focusOutEvent() or focusInEvent(), you may get an infinite recursion.

See also: hasFocus(), clearFocus(), focusInEvent(), focusOutEvent(), setFocusPolicy(), focusWidget(), QApplication::focusWidget(), grabKeyboard(), grabMouse(), {Keyboard Focus}, QEvent::RequestSoftwareInputPanel

Definition at line 6633 of file qwidget.cpp.

 {
     if (!isEnabled())
         return;
 
     QWidget *f = this;
     while (f->d_func()->extra && f->d_func()->extra->focus_proxy)
         f = f->d_func()->extra->focus_proxy;
 
     if (QApplication::focusWidget() == f
 #if defined(Q_WS_WIN)
         && GetFocus() == f->internalWinId()
 #endif
        )
         return;
 
 #ifndef QT_NO_GRAPHICSVIEW
     QWidget *previousProxyFocus = 0;
     if (QWExtra *topData = window()->d_func()->extra) {
         if (topData->proxyWidget && topData->proxyWidget->hasFocus()) {
             previousProxyFocus = topData->proxyWidget->widget()->focusWidget();
             if (previousProxyFocus && previousProxyFocus->focusProxy())
                 previousProxyFocus = previousProxyFocus->focusProxy();
             if (previousProxyFocus == this && !topData->proxyWidget->d_func()->proxyIsGivingFocus)
                 return;
         }
     }
 #endif
 
     QWidget *w = f;
     if (isHidden()) {
         while (w && w->isHidden()) {
             w->d_func()->focus_child = f;
             w = w->isWindow() ? 0 : w->parentWidget();
         }
     } else {
         while (w) {
             w->d_func()->focus_child = f;
             w = w->isWindow() ? 0 : w->parentWidget();
         }
     }
 
 #ifndef QT_NO_GRAPHICSVIEW
     // Update proxy state
     if (QWExtra *topData = window()->d_func()->extra) {
         if (topData->proxyWidget && !topData->proxyWidget->hasFocus()) {
             topData->proxyWidget->d_func()->focusFromWidgetToProxy = 1;
             topData->proxyWidget->setFocus(reason);
             topData->proxyWidget->d_func()->focusFromWidgetToProxy = 0;
         }
     }
 #endif
 
     if (f->isActiveWindow()) {
         QApplicationPrivate::setFocusWidget(f, reason);
 #ifndef QT_NO_ACCESSIBILITY
 # ifdef Q_OS_WIN
         // The negation of the condition in setFocus_sys
         if (!(testAttribute(Qt::WA_WState_Created) && window()->windowType() != Qt::Popup && internalWinId()))
             //setFocusWidget will already post a focus event for us (that the AT client receives) on Windows
 # endif
 # ifdef  Q_OS_UNIX
         // menus update the focus manually and this would create bogus events
         if (!(f->inherits("QMenuBar") || f->inherits("QMenu") || f->inherits("QMenuItem")))
 # endif
             QAccessible::updateAccessibility(f, 0, QAccessible::Focus);
 #endif
 #ifndef QT_NO_GRAPHICSVIEW
         if (QWExtra *topData = window()->d_func()->extra) {
             if (topData->proxyWidget) {
                 if (previousProxyFocus && previousProxyFocus != f) {
                     // Send event to self
                     QFocusEvent event(QEvent::FocusOut, reason);
                     QPointer<QWidget> that = previousProxyFocus;
                     QApplication::sendEvent(previousProxyFocus, &event);
                     if (that)
                         QApplication::sendEvent(that->style(), &event);
                 }
                 if (!isHidden()) {
 #ifndef QT_NO_GRAPHICSVIEW
                     // Update proxy state
                     if (QWExtra *topData = window()->d_func()->extra)
                         if (topData->proxyWidget && topData->proxyWidget->hasFocus())
                             topData->proxyWidget->d_func()->updateProxyInputMethodAcceptanceFromWidget();
 #endif
                     // Send event to self
                     QFocusEvent event(QEvent::FocusIn, reason);
                     QPointer<QWidget> that = f;
                     QApplication::sendEvent(f, &event);
                     if (that)
                         QApplication::sendEvent(that->style(), &event);
                 }
             }
         }
 #endif
     }
 }

◆ setFocusPolicy()

void QWidget::setFocusPolicy ( Qt::FocusPolicy policy )

Definition at line 7631 of file qwidget.cpp.

Referenced by QColumnViewPrivate::_q_changeCurrentColumn(), QAxClientSite::activateObject(), QAxWidget::clear(), CloseButton::CloseButton(), QMdi::ControlLabel::ControlLabel(), QMdi::ControllerWidget::ControllerWidget(), QColumnViewPrivate::createColumn(), QToolBarLayout::createItem(), QCalendarWidgetPrivate::createNavigationBar(), QAbstractButtonPrivate::fixFocusPolicy(), QTabBarPrivate::init(), QHeaderView::initialize(), QCalendarWidget::QCalendarWidget(), QDockWidgetTitleButton::QDockWidgetTitleButton(), QFocusFrame::QFocusFrame(), QMdiArea::QMdiArea(), QMDIControl::QMDIControl(), QMdiSubWindow::QMdiSubWindow(), QMessageBoxDetailsText::QMessageBoxDetailsText(), QToolBarLayout::QToolBarLayout(), QToolBoxButton::QToolBoxButton(), QVistaBackButton::QVistaBackButton(), QWellArray::QWellArray(), QWhatsThat::QWhatsThat(), QX11EmbedContainer::QX11EmbedContainer(), QX11EmbedWidget::QX11EmbedWidget(), QGroupBox::setCheckable(), QCompleter::setPopup(), QLabel::setTextInteractionFlags(), and QGraphicsView::setupViewport().

 {
     data->focus_policy = (uint) policy;
     Q_D(QWidget);
     if (d->extra && d->extra->focus_proxy)
         d->extra->focus_proxy->setFocusPolicy(policy);
 }

◆ setFocusProxy()

void QWidget::setFocusProxy ( QWidget * w )

Sets the widget's focus proxy to widget w.

If w is 0, the function resets this widget to have no focus proxy.

Some widgets can "have focus", but create a child widget, such as QLineEdit, to actually handle the focus. In this case, the widget can set the line edit to be its focus proxy.

setFocusProxy() sets the widget which will actually get focus when "this widget" gets it. If there is a focus proxy, setFocus() and hasFocus() operate on the focus proxy.

See also: focusProxy()

Definition at line 6537 of file qwidget.cpp.

Referenced by QAxClientSite::activateObject(), QDialogButtonBoxPrivate::layoutButtons(), QCalendarWidget::QCalendarWidget(), QScriptDebuggerCodeFinderWidget::QScriptDebuggerCodeFinderWidget(), QScriptNewBreakpointWidget::QScriptNewBreakpointWidget(), QCompleter::setPopup(), and QTabWidget::setTabBar().

 {
     Q_D(QWidget);
     if (!w && !d->extra)
         return;
 
     for (QWidget* fp  = w; fp; fp = fp->focusProxy()) {
         if (fp == this) {
             qWarning("QWidget: %s (%s) already in focus proxy chain", metaObject()->className(), objectName().toLocal8Bit().constData());
             return;
         }
     }
 
     d->createExtra();
     d->extra->focus_proxy = w;
 }

◆ setFont()

void QWidget::setFont ( const QFont & font )

Use the single-argument overload instead.

Definition at line 4996 of file qwidget.cpp.

Referenced by QCalendarWidgetPrivate::createNavigationBar(), QListWidgetItem::font(), QMacStyle::polish(), QWindowsVistaStyle::polish(), QBalloonTip::QBalloonTip(), QWizardHeader::QWizardHeader(), QWizardPrivate::recreateLayout(), QToolButton::setDefaultAction(), QMessageBox::setInformativeText(), QWindowsVistaStyle::unpolish(), QStyleSheetStyle::unsetPalette(), and QTextEdit::zoomIn().

 {
     Q_D(QWidget);
 
 #ifndef QT_NO_STYLE_STYLESHEET
     const QStyleSheetStyle* style;
     if (d->extra && (style = qobject_cast<const QStyleSheetStyle*>(d->extra->style))) {
         style->saveWidgetFont(this, font);
     }
 #endif
 
     setAttribute(Qt::WA_SetFont, font.resolve() != 0);
 
     // Determine which font is inherited from this widget's ancestors and
     // QApplication::font, resolve this against \a font (attributes from the
     // inherited font are copied over). Then propagate this font to this
     // widget's children.
     QFont naturalFont = d->naturalWidgetFont(d->inheritedFontResolveMask);
     QFont resolvedFont = font.resolve(naturalFont);
     d->setFont_helper(resolvedFont);
 }

◆ setForegroundRole()

void QWidget::setForegroundRole ( QPalette::ColorRole role )

Sets the foreground role of the widget to role.

The foreground role defines the color from the widget's palette that is used to draw the foreground.

If role is QPalette::NoRole, the widget uses a foreground role that contrasts with the background role.

Note that styles are free to choose any color from the palette. You can modify the palette or set a style sheet if you don't achieve the result you want with setForegroundRole().

See also: foregroundRole(), backgroundRole()

Definition at line 4773 of file qwidget.cpp.

Referenced by QTipLabel::QTipLabel().

 {
     Q_D(QWidget);
     d->fg_role = role;
     d->updateSystemBackground();
     d->propagatePaletteChange();
 }

◆ setGeometry() [1/2]

void QWidget::setGeometry	(	int	x,
		int	y,
		int	w,
		int	h
	)

inline

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This corresponds to setGeometry(QRect(x, y, w, h)).

Definition at line 1017 of file qwidget.h.

Referenced by QWorkspacePrivate::_q_scrollBarChanged(), QCalendarWidgetPrivate::_q_yearClicked(), QWorkspaceChild::adjustToFullscreen(), QWidgetAnimator::animate(), QApplicationPrivate::applyX11SpecificCommandLineArguments(), QWorkspace::cascade(), QColumnViewPrivate::createColumn(), QColumnViewPrivate::doLayout(), QLayoutPrivate::doResize(), QMenuBar::eventFilter(), fixToolBarOrientation(), QWorkspacePrivate::hideChild(), QProgressDialogPrivate::layout(), QTabBarPrivate::layoutTabs(), make_widget_eventUPP(), QWorkspacePrivate::minimizeWindow(), QMenuPrivate::mouseEventTaken(), QSizeGrip::mouseMoveEvent(), QWidgetResizeHandler::mouseMoveEvent(), QVistaHelper::mouseMoveEvent(), QRubberBand::move(), QVNCIntegration::moveToScreen(), QWorkspacePrivate::normalizeWindow(), parseGeometry(), QMdiAreaPrivate::place(), QWorkspacePrivate::place(), QMenu::popup(), QOpenKODEWindow::QOpenKODEWindow(), qt_mac_widget_in_menu_eventHandler(), qWinProcessConfigRequests(), QMdi::RegularTiler::rearrange(), QMdi::SimpleCascader::rearrange(), QMdi::IconTiler::rearrange(), QRubberBand::resize(), QScriptEdit::resizeEvent(), QWorkspaceChild::resizeEvent(), QBBScreen::resizeNativeWidgetWindow(), QBBScreen::resizeTopLevelWindow(), restoreGeometry(), QSplitterPrivate::setGeo(), QEglFSWindow::setGeometry(), QOpenKODEWindow::setGeometry(), QRubberBand::setGeometry(), QToolBarLayout::setGeometry(), QStackedLayout::setGeometry(), QRasterWindowSurface::setGeometry(), QAbstractItemView::setIndexWidget(), QStackedLayout::setStackingMode(), QCompleterPrivate::showPopup(), QComboBox::showPopup(), QWorkspace::tile(), QMainWindowLayout::toggleToolBarsVisible(), QETWidget::translateEmbedEvent(), QMenuPrivate::updateActionRects(), QDateTimeEditPrivate::updateEditFieldGeometry(), QAbstractSpinBoxPrivate::updateEditFieldGeometry(), QStyledItemDelegate::updateEditorGeometry(), QItemDelegate::updateEditorGeometry(), QUIKitWindow::updateGeometryAndOrientation(), QComboBoxPrivate::updateLineEditGeometry(), QDesktopWidgetPrivate::updateScreenList(), QDockAreaLayoutInfo::updateSeparatorWidgets(), QDockAreaLayout::updateSeparatorWidgets(), and QMdiAreaPrivate::updateTabBarGeometry().

1018 { setGeometry(QRect(ax, ay, aw, ah)); }

QWidget::setGeometry

void setGeometry(int x, int y, int w, int h)

This is an overloaded member function, provided for convenience. It differs from the above function o...

Definition: qwidget.h:1017

QRect

The QRect class defines a rectangle in the plane using integer precision.

Definition: qrect.h:58

◆ setGeometry() [2/2]

void QWidget::setGeometry ( const QRect & r )

Definition at line 7213 of file qwidget.cpp.

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_Resized);
     setAttribute(Qt::WA_Moved);
     if (isWindow())
         d->topData()->posFromMove = false;
     if (testAttribute(Qt::WA_WState_Created)) {
         d->setGeometry_sys(r.x(), r.y(), r.width(), r.height(), true);
         d->setDirtyOpaqueRegion();
     } else {
         data->crect.setTopLeft(r.topLeft());
         data->crect.setSize(r.size().boundedTo(maximumSize()).expandedTo(minimumSize()));
         setAttribute(Qt::WA_PendingMoveEvent);
         setAttribute(Qt::WA_PendingResizeEvent);
     }
 }

◆ setGraphicsEffect()

void QWidget::setGraphicsEffect ( QGraphicsEffect * effect )

The setGraphicsEffect function is for setting the widget's graphics effect.

Sets effect as the widget's effect. If there already is an effect installed on this widget, QWidget will delete the existing effect before installing the new effect.

If effect is the installed on a different widget, setGraphicsEffect() will remove the effect from the widget and install it on this widget.

QWidget takes ownership of effect.

Note: This function will apply the effect on itself and all its children.; Graphics effects are not supported on Mac, so they will not cause any difference to the rendering of the widget.

Since: 4.6

See also: graphicsEffect()

Definition at line 5517 of file qwidget.cpp.

 {
     Q_D(QWidget);
     if (d->graphicsEffect == effect)
         return;
 
     if (d->graphicsEffect) {
         d->invalidateBuffer(rect());
         delete d->graphicsEffect;
         d->graphicsEffect = 0;
     }
 
     if (effect) {
         // Set new effect.
         QGraphicsEffectSourcePrivate *sourced = new QWidgetEffectSourcePrivate(this);
         QGraphicsEffectSource *source = new QGraphicsEffectSource(*sourced);
         d->graphicsEffect = effect;
         effect->d_func()->setGraphicsEffectSource(source);
         update();
     }
 
     d->updateIsOpaque();
 }

◆ setHidden

void QWidget::setHidden ( bool hidden )

inlineslot

Convenience function, equivalent to setVisible(!hidden).

Definition at line 495 of file qwidget.h.

Referenced by QListWidgetItem::listWidget(), QSplitterPrivate::recalc(), and QTreeWidget::setItemHidden().

495 { setVisible(!hidden); }

QWidget::setVisible

virtual void setVisible(bool visible)

Definition: qwidget.cpp:7991

◆ setInputContext()

void QWidget::setInputContext ( QInputContext * context )

This function sets the input context context on this widget.

Qt takes ownership of the given input context.

See also: inputContext()

Definition at line 491 of file qwidget.cpp.

 {
     Q_D(QWidget);
     if (!testAttribute(Qt::WA_InputMethodEnabled))
         return;
 
     if (context == d->ic)
         return;
     if (d->ic)
         delete d->ic;
     d->ic = context;
     if (d->ic)
         d->ic->setParent(this);
 }

◆ setInputMethodHints()

void QWidget::setInputMethodHints ( Qt::InputMethodHints hints )

Definition at line 9736 of file qwidget.cpp.

Referenced by QInputDialog::getText(), QLineEdit::setEchoMode(), setShown(), and QGraphicsViewPrivate::updateInputMethodSensitivity().

 {
 #ifndef QT_NO_IM
     Q_D(QWidget);
     if (d->imHints == hints)
         return;
     d->imHints = hints;
     // Optimization to update input context only it has already been created.
     if (d->ic || qApp->d_func()->inputContext) {
         QInputContext *ic = inputContext();
         if (ic)
             ic->update();
     }
 #endif //QT_NO_IM
 }

◆ setLayout()

void QWidget::setLayout ( QLayout * layout )

Sets the layout manager for this widget to layout.

If there already is a layout manager installed on this widget, QWidget won't let you install another. You must first delete the existing layout manager (returned by layout()) before you can call setLayout() with the new layout.

If layout is the layout manger on a different widget, setLayout() will reparent the layout and make it the layout manager for this widget.

Example:

    QVBoxLayout *layout = new QVBoxLayout;
    layout->addWidget(formWidget);
    setLayout(layout);

An alternative to calling this function is to pass this widget to the layout's constructor.

The QWidget will take ownership of layout.

See also: layout(), {Layout Management}

Definition at line 10104 of file qwidget.cpp.

Referenced by QCalendarWidgetPrivate::createNavigationBar(), QPrintPreviewDialogPrivate::init(), QAbstractScrollAreaScrollBarContainer::QAbstractScrollAreaScrollBarContainer(), QBalloonTip::QBalloonTip(), QLayout::QLayout(), QMdiSubWindow::QMdiSubWindow(), QMessageBoxDetailsText::QMessageBoxDetailsText(), and QPrintPropertiesDialog::QPrintPropertiesDialog().

 {
     if (!l) {
         qWarning("QWidget::setLayout: Cannot set layout to 0");
         return;
     }
     if (layout()) {
         if (layout() != l)
             qWarning("QWidget::setLayout: Attempting to set QLayout \"%s\" on %s \"%s\", which already has a"
                      " layout", l->objectName().toLocal8Bit().data(), metaObject()->className(),
                      objectName().toLocal8Bit().data());
         return;
     }
 
     QObject *oldParent = l->parent();
     if (oldParent && oldParent != this) {
         if (oldParent->isWidgetType()) {
             // Steal the layout off a widget parent. Takes effect when
             // morphing laid-out container widgets in Designer.
             QWidget *oldParentWidget = static_cast<QWidget *>(oldParent);
             oldParentWidget->takeLayout();
         } else {
             qWarning("QWidget::setLayout: Attempting to set QLayout \"%s\" on %s \"%s\", when the QLayout already has a parent",
                      l->objectName().toLocal8Bit().data(), metaObject()->className(),
                      objectName().toLocal8Bit().data());
             return;
         }
     }
 
     Q_D(QWidget);
     l->d_func()->topLevel = true;
     d->layout = l;
     if (oldParent != this) {
         l->setParent(this);
         l->d_func()->reparentChildWidgets(this);
         l->invalidate();
     }
 
     if (isWindow() && d->maybeTopData())
         d->topData()->sizeAdjusted = false;
 }

◆ setLayoutDirection()

void QWidget::setLayoutDirection ( Qt::LayoutDirection direction )

Definition at line 5199 of file qwidget.cpp.

Referenced by QLineEdit::keyPressEvent(), and QComboBoxPrivate::updateLayoutDirection().

 {
     Q_D(QWidget);
 
     if (direction == Qt::LayoutDirectionAuto) {
         unsetLayoutDirection();
         return;
     }
 
     setAttribute(Qt::WA_SetLayoutDirection);
     d->setLayoutDirection_helper(direction);
 }

◆ setLocale()

void QWidget::setLocale ( const QLocale & locale )

Definition at line 6152 of file qwidget.cpp.

 {
     Q_D(QWidget);
 
     setAttribute(Qt::WA_SetLocale);
     d->setLocale_helper(locale);
 }

◆ setMask() [1/2]

void QWidget::setMask ( const QBitmap & bitmap )

Causes only the pixels of the widget for which bitmap has a corresponding 1 bit to be visible.

If the region includes pixels outside the rect() of the widget, window system controls in that area may or may not be visible, depending on the platform.

Note that this effect can be slow if the region is particularly complex.

The following code shows how an image with an alpha channel can be used to generate a mask for a widget:

    QLabel topLevelLabel;
    QPixmap pixmap(":/images/tux.png");
    topLevelLabel.setPixmap(pixmap);
    topLevelLabel.setMask(pixmap.mask());

The label shown by this code is masked using the image it contains, giving the appearance that an irregularly-shaped image is being drawn directly onto the screen.

Masked widgets receive mouse events only on their visible portions.

See also: clearMask(), windowOpacity(), {Shaped Clock Example}

Definition at line 13309 of file qwidget.cpp.

Referenced by QBalloonTip::balloon(), clearMask(), QMenu::event(), QPlastiqueStyle::eventFilter(), QTipLabel::resizeEvent(), QSplitterHandle::resizeEvent(), QShapedPixmapWidget::setPixmap(), QWorkspaceChild::updateMask(), QDockAreaLayoutInfo::updateSeparatorWidgets(), QDockAreaLayout::updateSeparatorWidgets(), and QApplication::widgetAt().

 {
     setMask(QRegion(bitmap));
 }

◆ setMask() [2/2]

void QWidget::setMask ( const QRegion & region )

Causes only the parts of the widget which overlap region to be visible.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

If the region includes pixels outside the rect() of the widget, window system controls in that area may or may not be visible, depending on the platform.

Note that this effect can be slow if the region is particularly complex.

See also: windowOpacity

Definition at line 13227 of file qwidget.cpp.

 {
     Q_D(QWidget);
 
     d->createExtra();
     if (newMask == d->extra->mask)
         return;
 
 #ifndef QT_NO_BACKINGSTORE
     const QRegion oldMask(d->extra->mask);
 #endif
 
     d->extra->mask = newMask;
     d->extra->hasMask = !newMask.isEmpty();
 
 #ifndef QT_MAC_USE_COCOA
     if (!testAttribute(Qt::WA_WState_Created))
         return;
 #endif
 
     d->setMask_sys(newMask);
 
 #ifndef QT_NO_BACKINGSTORE
     if (!isVisible())
         return;
 
     if (!d->extra->hasMask) {
         // Mask was cleared; update newly exposed area.
         QRegion expose(rect());
         expose -= oldMask;
         if (!expose.isEmpty()) {
             d->setDirtyOpaqueRegion();
             update(expose);
         }
         return;
     }
 
     if (!isWindow()) {
         // Update newly exposed area on the parent widget.
         QRegion parentExpose(rect());
         parentExpose -= newMask;
         if (!parentExpose.isEmpty()) {
             d->setDirtyOpaqueRegion();
             parentExpose.translate(data->crect.topLeft());
             parentWidget()->update(parentExpose);
         }
 
         // Update newly exposed area on this widget
         if (!oldMask.isEmpty())
             update(newMask - oldMask);
     }
 #endif
 }

◆ setMaximumHeight()

void QWidget::setMaximumHeight ( int maxh )

Definition at line 4352 of file qwidget.cpp.

Referenced by QStyleSheetStyle::setGeometry().

 {
     Q_D(QWidget);
     d->createExtra();
     uint expl = d->extra->explicitMaxSize | (h == QWIDGETSIZE_MAX ? 0 : Qt::Vertical);
     setMaximumSize(maximumSize().width(), h);
     d->extra->explicitMaxSize = expl;
 }

◆ setMaximumSize() [1/2]

void QWidget::setMaximumSize ( const QSize & s )

inline

Definition at line 972 of file qwidget.h.

Referenced by QLayout::activate(), QMainWindowLayout::insertIntoMacToolbar(), QmlJSDebugger::QmlToolBar::QmlToolBar(), QMainWindowLayout::removeFromMacToolbar(), setFixedHeight(), setFixedWidth(), setMaximumHeight(), setMaximumWidth(), QWizardHeader::setup(), QDialog::showExtension(), and QToolBarLayout::updateGeomArray().

973 { setMaximumSize(s.width(),s.height()); }

QWidget::setMaximumSize

void setMaximumSize(const QSize &)

Definition: qwidget.h:972

int width() const

Returns the width.

Definition: qsize.h:126

int height() const

Returns the height.

Definition: qsize.h:129

◆ setMaximumSize() [2/2]

void QWidget::setMaximumSize	(	int	maxw,
		int	maxh
	)

This function corresponds to setMaximumSize(QSize(maxw, maxh)).

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Sets the maximum width to maxw and the maximum height to maxh.

Definition at line 4201 of file qwidget.cpp.

 {
     Q_D(QWidget);
     if (!d->setMaximumSize_helper(maxw, maxh))
         return;
 
     if (isWindow())
         d->setConstraints_sys();
     if (maxw < width() || maxh < height()) {
         bool resized = testAttribute(Qt::WA_Resized);
         resize(qMin(maxw,width()), qMin(maxh,height()));
         setAttribute(Qt::WA_Resized, resized); //not a user resize
     }
 
 #ifndef QT_NO_GRAPHICSVIEW
     if (d->extra) {
         if (d->extra->proxyWidget)
             d->extra->proxyWidget->setMaximumSize(maxw, maxh);
     }
 #endif
 
     d->updateGeometry_helper(d->extra->minw == d->extra->maxw && d->extra->minh == d->extra->maxh);
 }

◆ setMaximumWidth()

void QWidget::setMaximumWidth ( int maxw )

Definition at line 4343 of file qwidget.cpp.

Referenced by QBalloonTip::QBalloonTip(), QExpandingLineEdit::resizeToContents(), and QStyleSheetStyle::setGeometry().

 {
     Q_D(QWidget);
     d->createExtra();
     uint expl = d->extra->explicitMaxSize | (w == QWIDGETSIZE_MAX ? 0 : Qt::Horizontal);
     setMaximumSize(w, maximumSize().height());
     d->extra->explicitMaxSize = expl;
 }

◆ setMinimumHeight()

void QWidget::setMinimumHeight ( int minh )

Definition at line 4334 of file qwidget.cpp.

Referenced by QColorShower::QColorShower(), QStyleSheetStyle::setGeometry(), and QWorkspaceChild::showShaded().

 {
     Q_D(QWidget);
     d->createExtra();
     uint expl = d->extra->explicitMinSize | (h ? Qt::Vertical : 0);
     setMinimumSize(minimumSize().width(), h);
     d->extra->explicitMinSize = expl;
 }

◆ setMinimumSize() [1/2]

void QWidget::setMinimumSize ( const QSize & s )

inline

Definition at line 969 of file qwidget.h.

Referenced by QLayout::activate(), QSystemTrayIconSys::addToTray(), QmlJSDebugger::QmlToolBar::QmlToolBar(), QWorkspaceChild::QWorkspaceChild(), setFixedHeight(), setFixedWidth(), QToolBar::setIconSize(), setMinimumHeight(), setMinimumWidth(), QToolBar::setToolButtonStyle(), QWizardHeader::setup(), QDialog::showExtension(), QMdiSubWindow::showShaded(), and QWorkspaceChild::showShaded().

970 { setMinimumSize(s.width(),s.height()); }

QWidget::setMinimumSize

void setMinimumSize(const QSize &)

Definition: qwidget.h:969

int width() const

Returns the width.

Definition: qsize.h:126

Referenced by QMenuBar::changeEvent(), QMenu::changeEvent(), QComboBoxPrivateContainer::changeEvent(), QMdi::ControllerWidget::ControllerWidget(), QGraphicsScenePrivate::enableMouseTrackingOnViews(), QTextBrowserPrivate::init(), QMenuPrivate::init(), QGLOverlayWidget::paintGL(), QMDIControl::QMDIControl(), QMdiSubWindow::QMdiSubWindow(), QScriptEditExtraArea::QScriptEditExtraArea(), qt_mac_get_widget_rgn(), QTipLabel::QTipLabel(), QWhatsThat::QWhatsThat(), QWidgetResizeHandler::QWidgetResizeHandler(), QWorkspaceChild::QWorkspaceChild(), QWorkspaceTitleBar::QWorkspaceTitleBar(), QGraphicsItem::setCursor(), QComboBoxPrivateContainer::setItemView(), QGLWidget::setMouseTracking(), QLabel::setText(), QGraphicsView::setupViewport(), QmlJSDebugger::QDeclarativeViewInspectorPrivate::setViewport(), and QGLWidgetPrivate::updateColormap().

int height() const

Returns the height.

Definition: qsize.h:129

◆ setMinimumSize() [2/2]

void QWidget::setMinimumSize	(	int	minw,
		int	minh
	)

This function corresponds to setMinimumSize(QSize(minw, minh)).

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Sets the minimum width to minw and the minimum height to minh.

Definition at line 4138 of file qwidget.cpp.

 {
     Q_D(QWidget);
     if (!d->setMinimumSize_helper(minw, minh))
         return;
 
     if (isWindow())
         d->setConstraints_sys();
     if (minw > width() || minh > height()) {
         bool resized = testAttribute(Qt::WA_Resized);
         bool maximized = isMaximized();
         resize(qMax(minw,width()), qMax(minh,height()));
         setAttribute(Qt::WA_Resized, resized); //not a user resize
         if (maximized)
             data->window_state = data->window_state | Qt::WindowMaximized;
     }
 #ifndef QT_NO_GRAPHICSVIEW
     if (d->extra) {
         if (d->extra->proxyWidget)
             d->extra->proxyWidget->setMinimumSize(minw, minh);
     }
 #endif
     d->updateGeometry_helper(d->extra->minw == d->extra->maxw && d->extra->minh == d->extra->maxh);
 }

◆ setMinimumWidth()

void QWidget::setMinimumWidth ( int minw )

Definition at line 4325 of file qwidget.cpp.

Referenced by QColumnViewPrivate::createColumn(), QColumnView::initializeColumn(), QColorShower::QColorShower(), QScriptDebuggerCodeFinderWidget::QScriptDebuggerCodeFinderWidget(), QStyleSheetStyle::setGeometry(), QColumnViewPreviewColumn::setPreviewWidget(), and QExpandingLineEdit::updateMinimumWidth().

 {
     Q_D(QWidget);
     d->createExtra();
     uint expl = d->extra->explicitMinSize | (w ? Qt::Horizontal : 0);
     setMinimumSize(w, minimumSize().height());
     d->extra->explicitMinSize = expl;
 }

◆ setMouseTracking()

void QWidget::setMouseTracking ( bool enable )

inline

Definition at line 990 of file qwidget.h.

991 { setAttribute(Qt::WA_MouseTracking, enable); }

Qt::WA_MouseTracking

Definition: qnamespace.h:379

QWidget::setAttribute

void setAttribute(Qt::WidgetAttribute, bool on=true)

Sets the attribute attribute on this widget if on is true; otherwise clears the attribute.

Definition: qwidget.cpp:11087

◆ setPalette()

void QWidget::setPalette ( const QPalette & palette )

Use the single-argument overload instead.

Definition at line 4858 of file qwidget.cpp.

Referenced by QFocusFrame::eventFilter(), QCalToolButton::paintEvent(), QMacStyle::polish(), QWindowsVistaStyle::polish(), QBalloonTip::QBalloonTip(), QMacNativeWidget::QMacNativeWidget(), QTipLabel::QTipLabel(), QWhatsThat::QWhatsThat(), QWizardPrivate::recreateLayout(), QToolTip::setPalette(), QStyleSheetStyle::setPalette(), QMacStyle::unpolish(), QStyleSheetStyle::unsetPalette(), QToolBoxPrivate::updateTabs(), QComboBoxPrivate::updateViewContainerPaletteAndOpacity(), QScriptDebuggerLocalsItemDelegate::validateInput(), and QScriptBreakpointsItemDelegate::validateInput().

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_SetPalette, palette.resolve() != 0);
 
     // Determine which palette is inherited from this widget's ancestors and
     // QApplication::palette, resolve this against \a palette (attributes from
     // the inherited palette are copied over this widget's palette). Then
     // propagate this palette to this widget's children.
     QPalette naturalPalette = d->naturalWidgetPalette(d->inheritedPaletteResolveMask);
     QPalette resolvedPalette = palette.resolve(naturalPalette);
     d->setPalette_helper(resolvedPalette);
 }

◆ setParent() [1/2]

void QWidget::setParent ( QWidget * parent )

Sets the parent of the widget to parent, and resets the window flags.

The widget is moved to position (0, 0) in its new parent.

If the new parent widget is in a different window, the reparented widget and its children are appended to the end of the tab chain of the new parent widget, in the same internal order as before. If one of the moved widgets had keyboard focus, setParent() calls clearFocus() for that widget.

If the new parent widget is in the same window as the old parent, setting the parent doesn't change the tab order or keyboard focus.

If the "new" parent widget is the old parent widget, this function does nothing.

Note: The widget becomes invisible as part of changing its parent, even if it was previously visible. You must call show() to make the widget visible again.

Warning: It is very unlikely that you will ever need this function. If you have a widget that changes its content dynamically, it is far easier to use QStackedWidget .

See also: setWindowFlags()

Definition at line 10479 of file qwidget.cpp.

Referenced by QMenuPrivate::QMacMenuPrivate::addAction(), QDialogButtonBox::addButton(), QLayout::addChildWidget(), QMdiArea::addSubWindow(), QAbstractScrollAreaScrollBarContainer::addWidget(), QMdiAreaPrivate::appendChild(), QColumnViewPrivate::createColumn(), QWorkspacePrivate::insertIcon(), QMainWindowLayout::insertIntoMacToolbar(), QSplitterPrivate::insertWidget_helper(), QWidgetPrivate::isBackgroundInherited(), QDialog::open(), QGtkStylePrivate::openDirectory(), QGtkStylePrivate::openFilename(), QGtkStylePrivate::openFilenames(), QPrintDialogPrivate::openWindowsPrintDialogModally(), q_createNativeChildrenAndSetParent(), qt_win_get_existing_directory(), qt_win_get_open_file_name(), qt_win_get_open_file_names(), qt_win_get_save_file_name(), qt_x11_recreateWidget(), QTornOffMenu::QTornOffMenu(), QWorkspaceChild::QWorkspaceChild(), QMdiSubWindowPrivate::removeBaseWidget(), QDialogButtonBox::removeButton(), QMdi::ControlContainer::removeButtonsFromMenuBar(), QMainWindowLayout::removeFromMacToolbar(), QLayoutPrivate::reparentChildWidgets(), QAbstractScrollAreaPrivate::replaceScrollBar(), QDeclarativeVME::run(), QGtkStylePrivate::saveFilename(), QWizard::setButton(), QProgressDialog::setCancelButton(), QAbstractScrollArea::setCornerWidget(), QMenuBar::setCornerWidget(), QTabWidget::setCornerWidget(), QDialog::setExtension(), QAbstractItemView::setIndexWidget(), QComboBoxPrivateContainer::setItemView(), QProgressDialog::setLabel(), QWizard::setPage(), QCompleter::setPopup(), QColumnViewPrivate::setPreviewWidget(), QDeclarativeView::setRootObject(), QMdiSubWindowPrivate::setSizeGrip(), QMdiSubWindow::setSystemMenu(), QTabWidget::setTabBar(), QTabBar::setTabButton(), QMdiArea::setupViewport(), QScrollArea::setWidget(), QMdiSubWindow::setWidget(), setWindowFlags(), QMessageBox::setWindowModality(), and QScrollArea::takeWidget().

 {
     if (parent == parentWidget())
         return;
     setParent((QWidget*)parent, windowFlags() & ~Qt::WindowType_Mask);
 }

◆ setParent() [2/2]

void QWidget::setParent	(	QWidget *	parent,
		Qt::WindowFlags	f
	)

This function also takes widget flags, f as an argument.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 10495 of file qwidget.cpp.

 {
     Q_D(QWidget);
     d->inSetParent = true;
     bool resized = testAttribute(Qt::WA_Resized);
     bool wasCreated = testAttribute(Qt::WA_WState_Created);
     QWidget *oldtlw = window();
 
     QWidget *desktopWidget = 0;
     if (parent && parent->windowType() == Qt::Desktop)
         desktopWidget = parent;
     bool newParent = (parent != parentWidget()) || !wasCreated || desktopWidget;
 
 #if defined(Q_WS_X11) || defined(Q_WS_WIN) || defined(Q_WS_MAC) || defined(Q_OS_SYMBIAN)
     if (newParent && parent && !desktopWidget) {
         if (testAttribute(Qt::WA_NativeWindow) && !qApp->testAttribute(Qt::AA_DontCreateNativeWidgetSiblings)
 #if defined(Q_WS_MAC) && defined(QT_MAC_USE_COCOA)
             // On Mac, toolbars inside the unified title bar will never overlap with
             // siblings in the content view. So we skip enforce native siblings in that case
             && !d->isInUnifiedToolbar && parentWidget() && parentWidget()->isWindow()
 #endif // Q_WS_MAC && QT_MAC_USE_COCOA
         )
             parent->d_func()->enforceNativeChildren();
         else if (parent->d_func()->nativeChildrenForced() || parent->testAttribute(Qt::WA_PaintOnScreen))
             setAttribute(Qt::WA_NativeWindow);
     }
 #endif
 
     if (wasCreated) {
         if (!testAttribute(Qt::WA_WState_Hidden)) {
             hide();
             setAttribute(Qt::WA_WState_ExplicitShowHide, false);
         }
         if (newParent) {
             QEvent e(QEvent::ParentAboutToChange);
             QApplication::sendEvent(this, &e);
         }
     }
     if (newParent && isAncestorOf(focusWidget()))
         focusWidget()->clearFocus();
 
     QTLWExtra *oldTopExtra = window()->d_func()->maybeTopData();
     QWidgetBackingStoreTracker *oldBsTracker = oldTopExtra ? &oldTopExtra->backingStore : 0;
 
     d->setParent_sys(parent, f);
 
     QTLWExtra *topExtra = window()->d_func()->maybeTopData();
     QWidgetBackingStoreTracker *bsTracker = topExtra ? &topExtra->backingStore : 0;
     if (oldBsTracker && oldBsTracker != bsTracker)
         oldBsTracker->unregisterWidgetSubtree(this);
 
     if (desktopWidget)
         parent = 0;
 
 #ifdef Q_BACKINGSTORE_SUBSURFACES
     QTLWExtra *extra = d->maybeTopData();
     QWindowSurface *windowSurface = (extra ? extra->windowSurface : 0);
     if (newParent && windowSurface) {
         QWidgetBackingStore *oldBs = oldtlw->d_func()->maybeBackingStore();
         if (oldBs)
             oldBs->subSurfaces.removeAll(windowSurface);
 
         if (parent) {
             QWidgetBackingStore *newBs = parent->d_func()->maybeBackingStore();
             if (newBs)
                 newBs->subSurfaces.append(windowSurface);
         }
     }
 #endif
 
     if (QWidgetBackingStore *oldBs = oldtlw->d_func()->maybeBackingStore()) {
         if (newParent)
             oldBs->removeDirtyWidget(this);
         // Move the widget and all its static children from
         // the old backing store to the new one.
         oldBs->moveStaticWidgets(this);
     }
 
     if ((QApplicationPrivate::app_compile_version < 0x040200
          || QApplicationPrivate::testAttribute(Qt::AA_ImmediateWidgetCreation))
         && !testAttribute(Qt::WA_WState_Created))
         create();
 
     d->reparentFocusWidgets(oldtlw);
     setAttribute(Qt::WA_Resized, resized);
     if (!testAttribute(Qt::WA_StyleSheet)
         && (!parent || !parent->testAttribute(Qt::WA_StyleSheet))) {
         d->resolveFont();
         d->resolvePalette();
     }
     d->resolveLayoutDirection();
     d->resolveLocale();
 
     // Note: GL widgets under WGL or EGL will always need a ParentChange
     // event to handle recreation/rebinding of the GL context, hence the
     // (f & Qt::MSWindowsOwnDC) clause (which is set on QGLWidgets on all
     // platforms).
     if (newParent
 #if defined(Q_WS_WIN) || defined(QT_OPENGL_ES)
         || (f & Qt::MSWindowsOwnDC)
 #endif
         ) {
         // propagate enabled updates enabled state to non-windows
         if (!isWindow()) {
             if (!testAttribute(Qt::WA_ForceDisabled))
                 d->setEnabled_helper(parent ? parent->isEnabled() : true);
             if (!testAttribute(Qt::WA_ForceUpdatesDisabled))
                 d->setUpdatesEnabled_helper(parent ? parent->updatesEnabled() : true);
         }
         d->inheritStyle();
 
         // send and post remaining QObject events
         if (parent && d->sendChildEvents) {
             QChildEvent e(QEvent::ChildAdded, this);
             QApplication::sendEvent(parent, &e);
 #ifdef QT3_SUPPORT
             if (parent->d_func()->pendingChildInsertedEvents.isEmpty()) {
                 QApplication::postEvent(parent,
                                         new QEvent(QEvent::ChildInsertedRequest),
                                         Qt::HighEventPriority);
             }
             parent->d_func()->pendingChildInsertedEvents.append(this);
 #endif
         }
 
 //### already hidden above ---> must probably do something smart on the mac
 // #ifdef Q_WS_MAC
 //             extern bool qt_mac_is_macdrawer(const QWidget *); //qwidget_mac.cpp
 //             if(!qt_mac_is_macdrawer(q)) //special case
 //                 q->setAttribute(Qt::WA_WState_Hidden);
 // #else
 //             q->setAttribute(Qt::WA_WState_Hidden);
 //#endif
 
         if (parent && d->sendChildEvents && d->polished) {
             QChildEvent e(QEvent::ChildPolished, this);
             QCoreApplication::sendEvent(parent, &e);
         }
 
         QEvent e(QEvent::ParentChange);
         QApplication::sendEvent(this, &e);
     }
 
     if (!wasCreated) {
         if (isWindow() || parentWidget()->isVisible())
             setAttribute(Qt::WA_WState_Hidden, true);
         else if (!testAttribute(Qt::WA_WState_ExplicitShowHide))
             setAttribute(Qt::WA_WState_Hidden, false);
     }
 
     d->updateIsOpaque();
 
 #ifndef QT_NO_GRAPHICSVIEW
     // Embed the widget into a proxy if the parent is embedded.
     // ### Doesn't handle reparenting out of an embedded widget.
     if (oldtlw->graphicsProxyWidget()) {
         if (QGraphicsProxyWidget *ancestorProxy = d->nearestGraphicsProxyWidget(oldtlw))
             ancestorProxy->d_func()->unembedSubWindow(this);
     }
     if (isWindow() && parent && !graphicsProxyWidget() && !bypassGraphicsProxyWidget(this)) {
         if (QGraphicsProxyWidget *ancestorProxy = d->nearestGraphicsProxyWidget(parent))
             ancestorProxy->d_func()->embedSubWindow(this);
     }
 #endif
 
     d->inSetParent = false;
 }

◆ setShortcutAutoRepeat()

void QWidget::setShortcutAutoRepeat	(	int	id,
		bool	enable = `true`
	)

If enable is true, auto repeat of the shortcut with the given id is enabled; otherwise it is disabled.

Since: 4.2

See also: grabShortcut() releaseShortcut()

Definition at line 11808 of file qwidget.cpp.

 {
     Q_ASSERT(qApp);
     if (id)
         qApp->d_func()->shortcutMap.setShortcutAutoRepeat(enable, id, this, 0);
 }

◆ setShortcutEnabled()

void QWidget::setShortcutEnabled	(	int	id,
		bool	enable = `true`
	)

If enable is true, the shortcut with the given id is enabled; otherwise the shortcut is disabled.

Warning: You should not normally need to use this function since Qt's shortcut system enables/disables shortcuts automatically as widgets become hidden/visible and gain or lose focus. It is best to use QAction or QShortcut to handle shortcuts, since they are easier to use than this low-level function.

See also: grabShortcut() releaseShortcut()

Definition at line 11790 of file qwidget.cpp.

Referenced by QTabBar::setTabEnabled(), and QTabBar::setTabText().

 {
     Q_ASSERT(qApp);
     if (id)
         qApp->d_func()->shortcutMap.setShortcutEnabled(enable, id, this, 0);
 }

◆ setShown

void QWidget::setShown ( bool shown )

inlineslot

Use setVisible(shown) instead.

Definition at line 502 of file qwidget.h.

502 { setVisible(shown); }

QWidget::setVisible

virtual void setVisible(bool visible)

Definition: qwidget.cpp:7991

◆ setSizeIncrement() [1/2]

void QWidget::setSizeIncrement ( const QSize & s )

inline

Definition at line 975 of file qwidget.h.

976 { setSizeIncrement(s.width(),s.height()); }

QWidget::setSizeIncrement

void setSizeIncrement(const QSize &)

Definition: qwidget.h:975

int width() const

Returns the width.

Definition: qsize.h:126

Referenced by QAbstractScrollAreaScrollBarContainer::addWidget(), QMdi::ControllerWidget::ControllerWidget(), QCalendarWidgetPrivate::createNavigationBar(), DetailButton::DetailButton(), QInputDialogPrivate::ensureLayout(), QSplitterPrivate::findWidget(), QTabWidgetPrivate::init(), QBalloonTip::QBalloonTip(), QCalendarWidget::QCalendarWidget(), QColorPicker::QColorPicker(), QColorWell::QColorWell(), QComboBoxPrivateScroller::QComboBoxPrivateScroller(), QDeclarativeView::QDeclarativeView(), QMDIControl::QMDIControl(), QToolBarExtension::QToolBarExtension(), QToolBarSeparator::QToolBarSeparator(), QToolBoxButton::QToolBoxButton(), QWizardHeader::QWizardHeader(), QWorkspaceTitleBar::QWorkspaceTitleBar(), QX11EmbedContainer::QX11EmbedContainer(), QX11EmbedWidget::QX11EmbedWidget(), QFrame::setFrameStyle(), QComboBoxPrivateContainer::setItemView(), QSplitter::setOrientation(), QToolBar::setOrientation(), QProgressBar::setOrientation(), QAbstractSlider::setOrientation(), QSplitter::setStretchFactor(), QMainWindow::statusBar(), and QCoreFuriCuri::timerEvent().

int height() const

Returns the height.

Definition: qsize.h:129

◆ setSizeIncrement() [2/2]

void QWidget::setSizeIncrement	(	int	w,
		int	h
	)

Sets the x (width) size increment to w and the y (height) size increment to h.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 4234 of file qwidget.cpp.

 {
     Q_D(QWidget);
     d->createTLExtra();
     QTLWExtra* x = d->topData();
     if (x->incw == w && x->inch == h)
         return;
     x->incw = w;
     x->inch = h;
     if (isWindow())
         d->setConstraints_sys();
 }

◆ setSizePolicy() [1/2]

void QWidget::setSizePolicy ( QSizePolicy policy )

Definition at line 10198 of file qwidget.cpp.

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_WState_OwnSizePolicy);
     if (policy == d->size_policy)
         return;
     d->size_policy = policy;
 
 #ifndef QT_NO_GRAPHICSVIEW
     if (QWExtra *extra = d->extra) {
         if (extra->proxyWidget)
             extra->proxyWidget->setSizePolicy(policy);
     }
 #endif
 
     updateGeometry();
 
     if (isWindow() && d->maybeTopData())
         d->topData()->sizeAdjusted = false;
 }

◆ setSizePolicy() [2/2]

void QWidget::setSizePolicy	(	QSizePolicy::Policy	horizontal,
		QSizePolicy::Policy	vertical
	)

inline

Sets the size policy of the widget to horizontal and vertical, with standard stretch and no height-for-width.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

See also: QSizePolicy::QSizePolicy()

Definition at line 1038 of file qwidget.h.

1039 { setSizePolicy(QSizePolicy(hor, ver)); }

QSizePolicy

Definition: qsizepolicy.h:55

QWidget::setSizePolicy

void setSizePolicy(QSizePolicy)

Definition: qwidget.cpp:10198

◆ setStatusTip()

void QWidget::setStatusTip ( const QString & s )

Definition at line 11629 of file qwidget.cpp.

Referenced by QToolButton::QToolButton(), QToolButton::setDefaultAction(), QListWidgetItem::statusTip(), and QHeaderView::viewportEvent().

 {
     Q_D(QWidget);
     d->statusTip = s;
 }

◆ setStyle()

void QWidget::setStyle ( QStyle * style )

Sets the widget's GUI style to style.

The ownership of the style object is not transferred.

If no style is set, the widget uses the application's style, QApplication::style() instead.

Setting a widget's style has no effect on existing or future child widgets.

Warning: This function is particularly useful for demonstration purposes, where you want to show Qt's styling capabilities. Real applications should avoid it and use one consistent GUI style instead.; Qt style sheets are currently not supported for custom QStyle subclasses. We plan to address this in some future release.

See also: style(), QStyle, QApplication::style(), QApplication::setStyle()

Definition at line 2772 of file qwidget.cpp.

Referenced by QDialogButtonBoxPrivate::createButton(), QWizardPrivate::ensureButton(), QWidgetPrivate::inheritStyle(), and QWizardPrivate::QWizardPrivate().

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_SetStyle, style != 0);
     d->createExtra();
 #ifndef QT_NO_STYLE_STYLESHEET
     if (QStyleSheetStyle *proxy = qobject_cast<QStyleSheetStyle *>(style)) {
         //if for some reason someone try to set a QStyleSheetStyle, ref it
         //(this may happen for exemple in QButtonDialogBox which propagates its style)
         proxy->ref();
         d->setStyle_helper(style, false);
     } else if (qobject_cast<QStyleSheetStyle *>(d->extra->style) || !qApp->styleSheet().isEmpty()) {
         // if we have an application stylesheet or have a proxy already, propagate
         d->setStyle_helper(new QStyleSheetStyle(style), true);
     } else
 #endif
         d->setStyle_helper(style, false);
 }

◆ setStyleSheet

void QWidget::setStyleSheet ( const QString & styleSheet )

slot

Definition at line 2709 of file qwidget.cpp.

Referenced by QTipLabel::placeTip(), QScriptDebuggerConsoleWidget::QScriptDebuggerConsoleWidget(), QScriptDebugOutputWidget::QScriptDebugOutputWidget(), and QApplication::setStyle().

 {
     Q_D(QWidget);
     d->createExtra();
 
     QStyleSheetStyle *proxy = qobject_cast<QStyleSheetStyle *>(d->extra->style);
     d->extra->styleSheet = styleSheet;
     if (styleSheet.isEmpty()) { // stylesheet removed
         if (!proxy)
             return;
 
         d->inheritStyle();
         return;
     }
 
     if (proxy) { // style sheet update
         proxy->repolish(this);
         return;
     }
 
     if (testAttribute(Qt::WA_SetStyle)) {
         d->setStyle_helper(new QStyleSheetStyle(d->extra->style), true);
     } else {
         d->setStyle_helper(new QStyleSheetStyle(0), true);
     }
 }

◆ setTabOrder()

void QWidget::setTabOrder	(	QWidget *	first,
		QWidget *	second
	)

static

Puts the second widget after the first widget in the focus order.

Note that since the tab order of the second widget is changed, you should order a chain like this:

setTabOrder(a, b); // a to b
setTabOrder(b, c); // a to b to c
setTabOrder(c, d); // a to b to c to d

not like this:

// WRONG
setTabOrder(c, d); // c to d
setTabOrder(a, b); // a to b AND c to d
setTabOrder(b, c); // a to b to c, but not c to d

If first or second has a focus proxy, setTabOrder() correctly substitutes the proxy.

See also: setFocusPolicy(), setFocusProxy(), {Keyboard Focus}

Definition at line 6975 of file qwidget.cpp.

Referenced by QAbstractItemViewPrivate::editor(), QDialogButtonBoxPrivate::layoutButtons(), and QWizardPrivate::setButtonLayout().

 {
     if (!first || !second || first->focusPolicy() == Qt::NoFocus || second->focusPolicy() == Qt::NoFocus)
         return;
 
     if (first->window() != second->window()) {
         qWarning("QWidget::setTabOrder: 'first' and 'second' must be in the same window");
         return;
     }
 
     QWidget *fp = first->focusProxy();
     if (fp) {
         // If first is redirected, set first to the last child of first
         // that can take keyboard focus so that second is inserted after
         // that last child, and the focus order within first is (more
         // likely to be) preserved.
         QList<QWidget *> l = first->findChildren<QWidget *>();
         for (int i = l.size()-1; i >= 0; --i) {
             QWidget * next = l.at(i);
             if (next->window() == fp->window()) {
                 fp = next;
                 if (fp->focusPolicy() != Qt::NoFocus)
                     break;
             }
         }
         first = fp;
     }
 
     if (fp == second)
         return;
 
     if (QWidget *sp = second->focusProxy())
         second = sp;
 
 //    QWidget *fp = first->d_func()->focus_prev;
     QWidget *fn = first->d_func()->focus_next;
 
     if (fn == second || first == second)
         return;
 
     QWidget *sp = second->d_func()->focus_prev;
     QWidget *sn = second->d_func()->focus_next;
 
     fn->d_func()->focus_prev = second;
     first->d_func()->focus_next = second;
 
     second->d_func()->focus_next = fn;
     second->d_func()->focus_prev = first;
 
     sp->d_func()->focus_next = sn;
     sn->d_func()->focus_prev = sp;
 
 
     Q_ASSERT(first->d_func()->focus_next->d_func()->focus_prev == first);
     Q_ASSERT(first->d_func()->focus_prev->d_func()->focus_next == first);
 
     Q_ASSERT(second->d_func()->focus_next->d_func()->focus_prev == second);
     Q_ASSERT(second->d_func()->focus_prev->d_func()->focus_next == second);
 }

◆ setToolTip()

void QWidget::setToolTip ( const QString & s )

Definition at line 11600 of file qwidget.cpp.

Referenced by CloseButton::CloseButton(), QToolTip::hideText(), QmlJSDebugger::QDeclarativeViewInspector::mouseMoveEvent(), QToolButton::QToolButton(), QToolButton::setDefaultAction(), QToolBoxPrivate::Page::setToolTip(), and QListWidgetItem::toolTip().

 {
     Q_D(QWidget);
     d->toolTip = s;
 
     QEvent event(QEvent::ToolTipChange);
     QApplication::sendEvent(this, &event);
 }

◆ setUpdatesEnabled()

void QWidget::setUpdatesEnabled ( bool enable )

Definition at line 7670 of file qwidget.cpp.

Referenced by QScriptDebuggerPrivate::handleResponse(), QAccessibleItemRow::navigate(), QRollEffect::scroll(), QStackedLayout::setCurrentIndex(), and QComboBox::showPopup().

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_ForceUpdatesDisabled, !enable);
     d->setUpdatesEnabled_helper(enable);
 }

◆ setupUi()

QWidget::setupUi ( QWidget * widget )

Sets up the user interface for the specified widget.

Note: This function is available with widgets that derive from user interface descriptions created using uic.

See also: {Using a Designer UI File in Your Application}

Referenced by QAxSelect::QAxSelect().

◆ setVisible

void QWidget::setVisible ( bool visible )

virtualslot

Reimplemented in QFileDialog, QWizard, QInputDialog, QMessageBox, QPrintDialog, QFontDialog, QColorDialog, QPrintPreviewWidget, QPageSetupDialog, QPrintPreviewDialog, QDialog, and QSizeGrip.

Definition at line 7991 of file qwidget.cpp.

Referenced by QPrintDialogPrivate::_q_collapseOrExpandDialog(), QMdiSubWindow::changeEvent(), QColumnViewPrivate::closeColumns(), QColumnViewPrivate::createColumn(), QCalendarView::QCalendarView(), QDesktopScreenWidget::QDesktopScreenWidget(), QRubberBand::QRubberBand(), QWizardPrivate::recreateLayout(), QMainWindowLayout::removeFromMacToolbar(), QAbstractScrollAreaPrivate::replaceScrollBar(), QDockAreaLayout::restoreDockWidget(), QDockAreaLayoutInfo::restoreState(), QToolBarAreaLayout::restoreState(), QDeclarativeView::setRootObject(), QStackedLayout::setStackingMode(), QSizeGrip::setVisible(), QDialog::setVisible(), QPrintPreviewWidget::setVisible(), QMenuBar::setVisible(), QMdiSubWindow::showShaded(), QETWidget::translateEmbedEvent(), QMenuPrivate::updateActionRects(), QDockWidgetPrivate::updateButtons(), and QMainWindowLayout::updateGapIndicator().

 {
     if (visible) { // show
         if (testAttribute(Qt::WA_WState_ExplicitShowHide) && !testAttribute(Qt::WA_WState_Hidden))
             return;
 
         Q_D(QWidget);
 
         // Designer uses a trick to make grabWidget work without showing
         if (!isWindow() && parentWidget() && parentWidget()->isVisible()
             && !parentWidget()->testAttribute(Qt::WA_WState_Created))
             parentWidget()->window()->d_func()->createRecursively();
 
         //we have to at least create toplevels before applyX11SpecificCommandLineArguments
         //but not children of non-visible parents
         QWidget *pw = parentWidget();
         if (!testAttribute(Qt::WA_WState_Created)
             && (isWindow() || pw->testAttribute(Qt::WA_WState_Created))) {
             create();
         }
 
 #if defined(Q_WS_X11)
         if (windowType() == Qt::Window)
             QApplicationPrivate::applyX11SpecificCommandLineArguments(this);
 #elif defined(Q_WS_QWS)
         if (windowType() == Qt::Window)
             QApplicationPrivate::applyQWSSpecificCommandLineArguments(this);
 #endif
 
         bool wasResized = testAttribute(Qt::WA_Resized);
         Qt::WindowStates initialWindowState = windowState();
 
         // polish if necessary
         ensurePolished();
 
         // remember that show was called explicitly
         setAttribute(Qt::WA_WState_ExplicitShowHide);
         // whether we need to inform the parent widget immediately
         bool needUpdateGeometry = !isWindow() && testAttribute(Qt::WA_WState_Hidden);
         // we are no longer hidden
         setAttribute(Qt::WA_WState_Hidden, false);
 
         if (needUpdateGeometry)
             d->updateGeometry_helper(true);
 
 #ifdef QT3_SUPPORT
         QApplication::sendPostedEvents(this, QEvent::ChildInserted);
 #endif
         // activate our layout before we and our children become visible
         if (d->layout)
             d->layout->activate();
 
         if (!isWindow()) {
             QWidget *parent = parentWidget();
             while (parent && parent->isVisible() && parent->d_func()->layout  && !parent->data->in_show) {
                 parent->d_func()->layout->activate();
                 if (parent->isWindow())
                     break;
                 parent = parent->parentWidget();
             }
             if (parent)
                 parent->d_func()->setDirtyOpaqueRegion();
         }
 
         // adjust size if necessary
         if (!wasResized
             && (isWindow() || !parentWidget()->d_func()->layout))  {
             if (isWindow()) {
                 adjustSize();
                 if (windowState() != initialWindowState)
                     setWindowState(initialWindowState);
             } else {
                 adjustSize();
             }
             setAttribute(Qt::WA_Resized, false);
         }
 
         setAttribute(Qt::WA_KeyboardFocusChange, false);
 
         if (isWindow() || parentWidget()->isVisible()) {
             // remove posted quit events when showing a new window
             QCoreApplication::removePostedEvents(qApp, QEvent::Quit);
 
             d->show_helper();
 
 #if defined(Q_WS_WIN) || defined(Q_WS_X11) || defined (Q_WS_QWS) || defined(Q_WS_MAC) || defined(Q_WS_QPA)
             qApp->d_func()->sendSyntheticEnterLeave(this);
 #endif
         }
 
         QEvent showToParentEvent(QEvent::ShowToParent);
         QApplication::sendEvent(this, &showToParentEvent);
     } else { // hide
         if (testAttribute(Qt::WA_WState_ExplicitShowHide) && testAttribute(Qt::WA_WState_Hidden))
             return;
 #if defined(Q_WS_WIN)
         // reset WS_DISABLED style in a Blocked window
         if(isWindow() && testAttribute(Qt::WA_WState_Created)
            && QApplicationPrivate::isBlockedByModal(this))
         {
             LONG dwStyle = GetWindowLong(winId(), GWL_STYLE);
             dwStyle &= ~WS_DISABLED;
             SetWindowLong(winId(), GWL_STYLE, dwStyle);
         }
 #endif
         if (QApplicationPrivate::hidden_focus_widget == this)
             QApplicationPrivate::hidden_focus_widget = 0;
 
         Q_D(QWidget);
 
         // hw: The test on getOpaqueRegion() needs to be more intelligent
         // currently it doesn't work if the widget is hidden (the region will
         // be clipped). The real check should be testing the cached region
         // (and dirty flag) directly.
         if (!isWindow() && parentWidget()) // && !d->getOpaqueRegion().isEmpty())
             parentWidget()->d_func()->setDirtyOpaqueRegion();
 
         setAttribute(Qt::WA_WState_Hidden);
         setAttribute(Qt::WA_WState_ExplicitShowHide);
         if (testAttribute(Qt::WA_WState_Created))
             d->hide_helper();
 
         // invalidate layout similar to updateGeometry()
         if (!isWindow() && parentWidget()) {
             if (parentWidget()->d_func()->layout)
                 parentWidget()->d_func()->layout->invalidate();
             else if (parentWidget()->isVisible())
                 QApplication::postEvent(parentWidget(), new QEvent(QEvent::LayoutRequest));
         }
 
         QEvent hideToParentEvent(QEvent::HideToParent);
         QApplication::sendEvent(this, &hideToParentEvent);
     }
 }

◆ setWhatsThis()

void QWidget::setWhatsThis ( const QString & s )

Definition at line 11655 of file qwidget.cpp.

Referenced by QWhatsThis::QWhatsThis(), QToolButton::setDefaultAction(), and QListWidgetItem::whatsThis().

 {
     Q_D(QWidget);
     d->whatsThis = s;
 }

◆ setWindowFilePath()

void QWidget::setWindowFilePath ( const QString & filePath )

Definition at line 6449 of file qwidget.cpp.

 {
     if (filePath == windowFilePath())
         return;
 
     Q_D(QWidget);
 
     d->createTLExtra();
     d->extra->topextra->filePath = filePath;
     d->setWindowFilePath_helper(filePath);
 }

◆ setWindowFlags()

void QWidget::setWindowFlags ( Qt::WindowFlags type )

Definition at line 10399 of file qwidget.cpp.

Referenced by QMdiAreaPrivate::appendChild(), QRubberBand::changeEvent(), QDialog::exec(), QMdiAreaPrivate::highlightNextSubWindow(), QDesktopScreenWidget::QDesktopScreenWidget(), QDialog::QDialog(), QmlJSDebugger::QmlToolBar::QmlToolBar(), qt_mac_updateToolBarButtonHint(), QWizard::QWizard(), QmlJSDebugger::AbstractViewInspector::setShowAppOnTop(), QColorDialog::setVisible(), and QMdiSubWindowPrivate::setWindowFlags().

 {
     if (data->window_flags == flags)
         return;
 
     Q_D(QWidget);
 
     if ((data->window_flags | flags) & Qt::Window) {
         // the old type was a window and/or the new type is a window
         QPoint oldPos = pos();
         bool visible = isVisible();
         setParent(parentWidget(), flags);
 
         // if both types are windows or neither of them are, we restore
         // the old position
         if (!((data->window_flags ^ flags) & Qt::Window)
             && (visible || testAttribute(Qt::WA_Moved))) {
             move(oldPos);
         }
         // for backward-compatibility we change Qt::WA_QuitOnClose attribute value only when the window was recreated.
         d->adjustQuitOnCloseAttribute();
     } else {
         data->window_flags = flags;
     }
 }

◆ setWindowIcon()

void QWidget::setWindowIcon ( const QIcon & icon )

Definition at line 6362 of file qwidget.cpp.

Referenced by QMdi::ControlContainer::ControlContainer(), QWorkspaceChild::QWorkspaceChild(), QMdiSubWindow::setWidget(), update(), and QMdi::ControlContainer::updateWindowIcon().

 {
     Q_D(QWidget);
 
     setAttribute(Qt::WA_SetWindowIcon, !icon.isNull());
     d->createTLExtra();
 
     if (!d->extra->topextra->icon)
         d->extra->topextra->icon = new QIcon();
     *d->extra->topextra->icon = icon;
 
     delete d->extra->topextra->iconPixmap;
     d->extra->topextra->iconPixmap = 0;
 
     d->setWindowIcon_sys();
     d->setWindowIcon_helper();
 }

◆ setWindowIconText()

void QWidget::setWindowIconText ( const QString & iconText )

Definition at line 6299 of file qwidget.cpp.

 {
     if (QWidget::windowIconText() == iconText)
         return;
 
     Q_D(QWidget);
     d->topData()->iconText = iconText;
     d->setWindowIconText_helper(iconText);
 
     QEvent e(QEvent::IconTextChange);
     QApplication::sendEvent(this, &e);
 }

◆ setWindowModality()

void QWidget::setWindowModality ( Qt::WindowModality windowModality )

Definition at line 2991 of file qwidget.cpp.

Referenced by create(), QMessageBox::critical(), QDialog::open(), and QMessageBox::setWindowModality().

 {
     data->window_modality = windowModality;
     // setModal_sys() will be called by setAttribute()
     setAttribute(Qt::WA_ShowModal, (data->window_modality != Qt::NonModal));
     setAttribute(Qt::WA_SetWindowModality, true);
 }

◆ setWindowModified

void QWidget::setWindowModified ( bool mod )

slot

Definition at line 11559 of file qwidget.cpp.

Referenced by QMdiSubWindow::event(), QWorkspace::eventFilter(), QMdiSubWindow::eventFilter(), QWorkspaceChild::eventFilter(), QMdiSubWindowPrivate::removeButtonsFromMenuBar(), QMdiSubWindow::setWidget(), and QMdiSubWindowPrivate::showButtonsInMenuBar().

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_WindowModified, mod);
 
 #ifndef Q_WS_MAC
     if (!windowTitle().contains(QLatin1String("[*]")) && mod)
         qWarning("QWidget::setWindowModified: The window title does not contain a '[*]' placeholder");
 #endif
     d->setWindowTitle_helper(windowTitle());
     d->setWindowIconText_helper(windowIconText());
 #ifdef Q_WS_MAC
     d->setWindowModified_sys(mod);
 #endif
 
     QEvent e(QEvent::ModifiedChange);
     QApplication::sendEvent(this, &e);
 }

◆ setWindowOpacity()

void QWidget::setWindowOpacity ( qreal level )

Definition at line 11497 of file qwidget.cpp.

Referenced by QWindowsXPStyle::polish(), QMacStyle::polish(), QTipLabel::QTipLabel(), QAlphaWidget::render(), QAlphaWidget::run(), QWindowsXPStyle::unpolish(), QMacStyle::unpolish(), and QAlphaWidget::~QAlphaWidget().

 {
     Q_D(QWidget);
     if (!isWindow())
         return;
 
     opacity = qBound(qreal(0.0), opacity, qreal(1.0));
     QTLWExtra *extra = d->topData();
     extra->opacity = uint(opacity * 255);
     setAttribute(Qt::WA_WState_WindowOpacitySet);
 
 #ifndef Q_WS_QWS
     if (!testAttribute(Qt::WA_WState_Created))
         return;
 #endif
 
 #ifndef QT_NO_GRAPHICSVIEW
     if (QGraphicsProxyWidget *proxy = graphicsProxyWidget()) {
         // Avoid invalidating the cache if set.
         if (proxy->cacheMode() == QGraphicsItem::NoCache)
             proxy->update();
         else if (QGraphicsScene *scene = proxy->scene())
             scene->update(proxy->sceneBoundingRect());
         return;
     }
 #endif
 
     d->setWindowOpacity_sys(opacity);
 }

◆ setWindowRole()

void QWidget::setWindowRole ( const QString & role )

Sets the window's role to role.

This only makes sense for windows on X11.

Definition at line 6493 of file qwidget.cpp.

 {
 #if defined(Q_WS_X11)
     Q_D(QWidget);
     d->topData()->role = role;
     d->setWindowRole();
 #else
     Q_UNUSED(role)
 #endif
 }

◆ setWindowState()

void QWidget::setWindowState ( Qt::WindowStates windowState )

Sets the window state to windowState.

The window state is a OR'ed combination of Qt::WindowState: Qt::WindowMinimized, Qt::WindowMaximized, Qt::WindowFullScreen, and Qt::WindowActive.

If the window is not visible (i.e. isVisible() returns false), the window state will take effect when show() is called. For visible windows, the change is immediate. For example, to toggle between full-screen and normal mode, use the following code:

w->setWindowState(w->windowState() ^ Qt::WindowFullScreen);

In order to restore and activate a minimized window (while preserving its maximized and/or full-screen state), use the following:

w->setWindowState(w->windowState() & ~Qt ::WindowMinimized | Qt::WindowActive);

Calling this function will hide the widget. You must call show() to make the widget visible again.

Note: On some window systems Qt::WindowActive is not immediate, and may be ignored in certain cases.

When the window state changes, the widget receives a changeEvent() of type QEvent::WindowStateChange.

See also: Qt::WindowState windowState()

Definition at line 3740 of file qwidget_mac.mm.

Referenced by effectiveState(), QDialog::event(), QDialog::exec(), QApplicationPrivate::globalEventProcessor(), qstring_to_xtp(), qt_grab_cursor(), qt_tablet_cleanup_wce(), QtWndProc(), QDockAreaLayout::restoreDockWidget(), restoreGeometry(), QToolBarAreaLayout::restoreState(), QWorkspace::setActiveWindow(), QDialog::setVisible(), setVisible(), QDialog::showEvent(), showFullScreen(), showMaximized(), QWorkspaceChild::showMaximized(), showMinimized(), QWorkspaceChild::showMinimized(), showNormal(), and QWorkspaceChild::showNormal().

 {
     Q_D(QWidget);
     bool needShow = false;
     Qt::WindowStates oldstate = windowState();
     if (oldstate == newstate)
         return;
 
 #ifdef QT_MAC_USE_COCOA
     QMacCocoaAutoReleasePool pool;
 #endif
     bool needSendStateChange = true;
     if(isWindow()) {
         if((oldstate & Qt::WindowFullScreen) != (newstate & Qt::WindowFullScreen)) {
             if(newstate & Qt::WindowFullScreen) {
                 if(QTLWExtra *tlextra = d->topData()) {
                     if(tlextra->normalGeometry.width() < 0) {
                         if(!testAttribute(Qt::WA_Resized))
                             adjustSize();
                         tlextra->normalGeometry = geometry();
                     }
                     tlextra->savedFlags = windowFlags();
                 }
                 needShow = isVisible();
                 const QRect fullscreen(qApp->desktop()->screenGeometry(qApp->desktop()->screenNumber(this)));
                 setParent(parentWidget(), Qt::Window | Qt::FramelessWindowHint | (windowFlags() & 0xffff0000)); //save
                 setGeometry(fullscreen);
                 if(!qApp->desktop()->screenNumber(this))
                     qt_mac_set_fullscreen_mode(true);
             } else {
                 needShow = isVisible();
                 if(!qApp->desktop()->screenNumber(this))
                     qt_mac_set_fullscreen_mode(false);
                 setParent(parentWidget(), d->topData()->savedFlags);
                 setGeometry(d->topData()->normalGeometry);
                 d->topData()->normalGeometry.setRect(0, 0, -1, -1);
             }
         }
 
         d->createWinId();
 
         OSWindowRef window = qt_mac_window_for(this);
         if((oldstate & Qt::WindowMinimized) != (newstate & Qt::WindowMinimized)) {
             if (newstate & Qt::WindowMinimized) {
 #ifndef QT_MAC_USE_COCOA
                 CollapseWindow(window, true);
 #else
                 [window miniaturize:window];
 #endif
             } else {
 #ifndef QT_MAC_USE_COCOA
                 CollapseWindow(window, false);
 #else
                 [window deminiaturize:window];
 #endif
             }
             needSendStateChange = oldstate == windowState(); // Collapse didn't change our flags.
         }
 
         if((newstate & Qt::WindowMaximized) && !((newstate & Qt::WindowFullScreen))) {
             if(QTLWExtra *tlextra = d->topData()) {
                 if(tlextra->normalGeometry.width() < 0) {
                     if(!testAttribute(Qt::WA_Resized))
                         adjustSize();
                     tlextra->normalGeometry = geometry();
                 }
             }
         } else if(!(newstate & Qt::WindowFullScreen)) {
 //            d->topData()->normalGeometry = QRect(0, 0, -1, -1);
         }
 
 #ifdef DEBUG_WINDOW_STATE
 #define WSTATE(x) qDebug("%s -- %s --> %s", #x, (oldstate & x) ? "true" : "false", (newstate & x) ? "true" : "false")
         WSTATE(Qt::WindowMinimized);
         WSTATE(Qt::WindowMaximized);
         WSTATE(Qt::WindowFullScreen);
 #undef WSTATE
 #endif
         if(!(newstate & (Qt::WindowMinimized|Qt::WindowFullScreen)) &&
            ((oldstate & Qt::WindowFullScreen) || (oldstate & Qt::WindowMinimized) ||
             (oldstate & Qt::WindowMaximized) != (newstate & Qt::WindowMaximized))) {
             if(newstate & Qt::WindowMaximized) {
                 data->fstrut_dirty = true;
 #ifndef QT_MAC_USE_COCOA
                 HIToolbarRef toolbarRef;
                 if (GetWindowToolbar(window, &toolbarRef) == noErr && toolbarRef
                         && !isVisible() && !IsWindowToolbarVisible(window)) {
                     // HIToolbar, needs to be shown so that it's in the structure window
                     // Typically this is part of a main window and will get shown
                     // during the show, but it's will make the maximize all wrong.
                     ShowHideWindowToolbar(window, true, false);
                     d->updateFrameStrut();  // In theory the dirty would work, but it's optimized out if the window is not visible :(
                 }
                 Rect bounds;
                 QDesktopWidget *dsk = QApplication::desktop();
                 QRect avail = dsk->availableGeometry(dsk->screenNumber(this));
                 SetRect(&bounds, avail.x(), avail.y(), avail.x() + avail.width(), avail.y() + avail.height());
                 if(QWExtra *extra = d->extraData()) {
                     if(bounds.right - bounds.left > extra->maxw)
                         bounds.right = bounds.left + extra->maxw;
                     if(bounds.bottom - bounds.top > extra->maxh)
                         bounds.bottom = bounds.top + extra->maxh;
                 }
                 if(d->topData()) {
                     QRect fs = d->frameStrut();
                     bounds.left += fs.left();
                     if(bounds.right < avail.x()+avail.width())
                         bounds.right = qMin<short>((uint)avail.x()+avail.width(), bounds.right+fs.left());
                     if(bounds.bottom < avail.y()+avail.height())
                         bounds.bottom = qMin<short>((uint)avail.y()+avail.height(), bounds.bottom+fs.top());
                     bounds.top += fs.top();
                     bounds.right -= fs.right();
                     bounds.bottom -= fs.bottom();
                 }
                 QRect orect(geometry().x(), geometry().y(), width(), height()),
                       nrect(bounds.left, bounds.top, bounds.right - bounds.left,
                             bounds.bottom - bounds.top);
                 if(orect != nrect) { // the new rect differ from the old
                     Point idealSize  = { nrect.height(), nrect.width() };
                     ZoomWindowIdeal(window, inZoomOut, &idealSize);
                 }
 #else
                 NSToolbar *toolbarRef = [window toolbar];
                 if (toolbarRef && !isVisible() && ![toolbarRef isVisible]) {
                     // HIToolbar, needs to be shown so that it's in the structure window
                     // Typically this is part of a main window and will get shown
                     // during the show, but it's will make the maximize all wrong.
                     // ### Not sure this is right for NSToolbar...
                     [toolbarRef setVisible:true];
 //                    ShowHideWindowToolbar(window, true, false);
                     d->updateFrameStrut();  // In theory the dirty would work, but it's optimized out if the window is not visible :(
                 }
                 // Everything should be handled by Cocoa.
                 if (!windowFlags() & Qt::FramelessWindowHint) {
                     [window zoom:window];
                 } else {
                     QDesktopWidget *dsk = QApplication::desktop();
                     QRect avail = dsk->availableGeometry(dsk->screenNumber(this));
                     setGeometry(avail);
                 }
 
 #endif
                 needSendStateChange = oldstate == windowState(); // Zoom didn't change flags.
             } else if(oldstate & Qt::WindowMaximized && !(oldstate & Qt::WindowFullScreen)) {
 #ifndef QT_MAC_USE_COCOA
                 Point idealSize;
                 ZoomWindowIdeal(window, inZoomIn, &idealSize);
 #else
                 [window zoom:window];
 #endif
                 if(QTLWExtra *tlextra = d->topData()) {
                     setGeometry(tlextra->normalGeometry);
                     tlextra->normalGeometry.setRect(0, 0, -1, -1);
                 }
             }
         }
     }
 
     data->window_state = newstate;
 
     if(needShow)
         show();
 
     if(newstate & Qt::WindowActive)
         activateWindow();
 
     qt_event_request_window_change(this);
     if (needSendStateChange) {
         QWindowStateChangeEvent e(oldstate);
         QApplication::sendEvent(this, &e);
     }
 }

◆ setWindowSurface()

void QWidget::setWindowSurface ( QWindowSurface * surface )

Sets the window surface to be the surface specified.

This function is under development and subject to change.

Since: 4.2

The QWidget takes will ownership of the surface. widget itself is deleted.

Definition at line 12774 of file qwidget.cpp.

Referenced by PvrEglScreenSurfaceFunctions::createNativeWindow(), QRuntimeGraphicsSystem::createWindowSurface(), and QWindowSurface::QWindowSurface().

 {
     // ### createWinId() ??
 
 #ifndef Q_BACKINGSTORE_SUBSURFACES
     if (!isTopLevel())
         return;
 #endif
 
     Q_D(QWidget);
 
     QTLWExtra *topData = d->topData();
     if (topData->windowSurface == surface)
         return;
 
     QWindowSurface *oldSurface = topData->windowSurface;
     delete topData->windowSurface;
     topData->windowSurface = surface;
 
     QWidgetBackingStore *bs = d->maybeBackingStore();
     if (!bs)
         return;
 
     if (isTopLevel()) {
         if (bs->windowSurface != oldSurface && bs->windowSurface != surface)
             delete bs->windowSurface;
         bs->windowSurface = surface;
     }
 #ifdef Q_BACKINGSTORE_SUBSURFACES
     else {
         bs->subSurfaces.append(surface);
     }
     bs->subSurfaces.removeOne(oldSurface);
 #endif
 }

◆ setWindowTitle

void QWidget::setWindowTitle ( const QString & title )

slot

Definition at line 6312 of file qwidget.cpp.

Referenced by QAxClientSite::activateObject(), QMainWindow::addToolBar(), QMessageBox::critical(), QWorkspace::eventFilter(), QWorkspaceChild::eventFilter(), QColorDialog::getColor(), QInputDialog::getDouble(), QFontDialogPrivate::getFont(), QInputDialog::getInt(), QInputDialog::getText(), QWorkspaceChild::iconWidget(), QToolBar::isAreaAllowed(), parseGeometry(), QAbstractPageSetupDialog::QAbstractPageSetupDialog(), QAbstractPrintDialog::QAbstractPrintDialog(), QDockWidget::QDockWidget(), QmlJSDebugger::QmlToolBar::QmlToolBar(), QErrorMessage::qtHandler(), QToolBar::QToolBar(), QTornOffMenu::QTornOffMenu(), QWorkspaceChild::QWorkspaceChild(), QWorkspaceTitleBar::QWorkspaceTitleBar(), QMdi::ControlContainer::removeButtonsFromMenuBar(), QAccessibleMdiSubWindow::setText(), QMessageBox::setWindowTitle(), QScriptEngineDebugger::standardWindow(), and QCoreFuriCuri::timerEvent().

 {
     if (QWidget::windowTitle() == title && !title.isEmpty() && !title.isNull())
         return;
 
     Q_D(QWidget);
     d->topData()->caption = title;
     d->setWindowTitle_helper(title);
 
     QEvent e(QEvent::WindowTitleChange);
     QApplication::sendEvent(this, &e);
 }

◆ show

void QWidget::show ( )

slot

Shows the widget and its child widgets.

This function is equivalent to setVisible(true).

See also: raise(), showEvent(), hide(), setVisible(), showMinimized(), showMaximized(), showNormal(), isVisible()

Definition at line 639 of file qwidget_wince.cpp.

Referenced by QScriptDebuggerPrivate::_q_findInScript(), QCalendarWidgetPrivate::_q_yearClicked(), QCalendarWidgetPrivate::_q_yearEditingFinished(), QMessageBox::about(), QMessageBox::aboutQt(), QAxClientSite::activateObject(), QAxServerBase::ActiveXProc(), QMenuPrivate::QMacMenuPrivate::addAction(), QDialogButtonBoxPrivate::addButtonsToLayout(), QMainWindow::addDockWidget(), QAbstractScrollArea::addScrollBarWidget(), QMainWindowLayout::animationFinished(), QBalloonTip::balloon(), QSplitter::childEvent(), QEgl::createSurface(), QInputDialogPrivate::ensureLayout(), QMdiSubWindowPrivate::enterRubberBandMode(), QFocusFrame::eventFilter(), QMdiSubWindow::eventFilter(), QDialog::exec(), QProgressDialog::forceShow(), QStatusBar::hideOrShow(), QWorkspacePrivate::insertIcon(), QToolBox::insertItem(), QStatusBar::insertPermanentWidget(), QStatusBar::insertWidget(), QSplitterPrivate::insertWidget(), QSplitterPrivate::insertWidget_helper(), QDialogButtonBoxPrivate::layoutButtons(), QTabBarPrivate::layoutTabs(), QMenuPrivate::mouseEventTaken(), QDialog::open(), QAbstractItemViewPrivate::openEditor(), QAbstractItemView::openPersistentEditor(), QGLOverlayWidget::paintGL(), QMenu::popup(), qt_mac_unregister_widget(), QAxClientSite::qt_metacall(), qt_x11_recreateWidget(), QApplication::qwsProcessEvent(), QMdi::ControlContainer::removeButtonsFromMenuBar(), QAlphaWidget::render(), QMainWindowLayout::restoreState(), QAlphaWidget::run(), QRollEffect::run(), QWhatsThisPrivate::say(), QRollEffect::scroll(), QProgressDialog::setCancelButton(), QAbstractScrollArea::setCornerWidget(), QStackedLayout::setCurrentIndex(), QToolBarLayout::setGeometry(), QAbstractItemView::setIndexWidget(), QInputDialogPrivate::setInputWidget(), QProgressDialog::setLabel(), QMdiSubWindowPrivate::setMaximizeMode(), QMdiSubWindowPrivate::setNormalMode(), QCompleter::setPopup(), QTreeView::setRootIsDecorated(), QmlJSDebugger::AbstractViewInspector::setShowAppOnTop(), QTableView::setShowGrid(), QHeaderView::setSortIndicatorShown(), QTabWidget::setTabBar(), QTabBar::setTabButton(), QProgressDialog::setValue(), QCalendarWidget::setVerticalHeaderFormat(), QMdiAreaPrivate::setViewMode(), QGraphicsProxyWidgetPrivate::setWidget_helper(), QDockWidgetLayout::setWidgetForRole(), QWorkspaceChild::show(), QMdi::ControlContainer::showButtonsInMenuBar(), QWidgetPrivate::showChildren(), QmlApplicationViewer::showExpanded(), showFullScreen(), showMaximized(), QErrorMessage::showMessage(), showMinimized(), showNormal(), QCompleterPrivate::showPopup(), QComboBox::showPopup(), QMdiAreaPrivate::showRubberBandFor(), QToolTip::showText(), QWorkspacePrivate::showWindow(), QWizardPrivate::switchToPage(), QAbstractItemView::updateEditorGeometries(), QComboBoxPrivateContainer::updateScrollers(), QDockAreaLayoutInfo::updateSeparatorWidgets(), QDockAreaLayout::updateSeparatorWidgets(), and QSystemTrayIconSys::x11Event().

 {
     Qt::WindowFlags flags = windowFlags() & 0xff;
     int threshold = qApp->autoMaximizeThreshold();
     if ((threshold < 0) || (windowState() & Qt::WindowFullScreen) || (windowState() & Qt::WindowMaximized)) {
         setVisible(true);
         return;
     }
     int height = sizeHint().height();
     int screenHeight = (qreal(threshold) / 100.0f * qApp->desktop()->screenGeometry(this).height());
     bool maximize  = height > screenHeight;
     if (!maximize) {
         // If we do not maximize yet we check the widget and its child widgets whether they are
         //vertically expanding. If one of the widgets is expanding we maximize.
         QList<QWidget *> list = findChildren<QWidget *>();
         bool expandingChild = sizePolicy().verticalPolicy () == QSizePolicy::Expanding;
         for (int i = 0; (i < list.size()) && !expandingChild; ++i) {
             expandingChild = list.at(i)->sizePolicy().verticalPolicy () == QSizePolicy::Expanding;
         }
         maximize = expandingChild;
     }
     if ((minimumSizeHint().height() > qApp->desktop()->screenGeometry(this).height()) || (minimumSizeHint().width() > qApp->desktop()->screenGeometry(this).width()))
         maximize = false;
 
     if ((flags == Qt::Window || flags == Qt::Dialog) && maximize) {
         setWindowState((windowState() & ~(Qt::WindowMinimized | Qt::WindowFullScreen))
             | Qt::WindowMaximized);
         setVisible(true);
     }
     else {
         setVisible(true);
     }
 }

◆ showEvent()

void QWidget::showEvent ( QShowEvent * event )

protectedvirtual

This event handler can be reimplemented in a subclass to receive widget show events which are passed in the event parameter.

Non-spontaneous show events are sent to widgets immediately before they are shown. The spontaneous show events of windows are delivered afterwards.

Note: A widget receives spontaneous show and hide events when its mapping status is changed by the window system, e.g. a spontaneous hide event when the user minimizes the window, and a spontaneous show event when the window is restored again. After receiving a spontaneous hide event, a widget is still considered visible in the sense of isVisible().

See also: visible, event(), QShowEvent

Reimplemented in QMessageBox, QTextEdit, QGraphicsView, QPlainTextEdit, QComboBoxPrivateContainer, QComboBox, QTabBar, QTabWidget, QWhatsThat, QMdiArea, QAbstractSpinBox, QAxHostWidget, QProgressDialog, QX11EmbedContainer, QMdiSubWindow, QDialog, QWorkspace, QToolBox, QPrintPropertiesDialog, QStatusBar, QRubberBand, QWSEmbedWidget, and QSizeGrip.

Definition at line 9842 of file qwidget.cpp.

Referenced by QComboBox::addItems(), event(), QRubberBand::resize(), setShown(), QWidgetPrivate::show_helper(), QSizeGrip::showEvent(), QToolBox::showEvent(), QWorkspace::showEvent(), QMdiSubWindow::showEvent(), QMdiArea::showEvent(), QComboBox::showEvent(), QGraphicsView::showEvent(), and QPlainTextEdit::toPlainText().

9843 {

9844 }

◆ showFullScreen

void QWidget::showFullScreen ( )

slot

Shows the widget in full-screen mode.

Calling this function only affects windows.

To return from full-screen mode, call showNormal().

Full-screen mode works fine under Windows, but has certain problems under X. These problems are due to limitations of the ICCCM protocol that specifies the communication between X11 clients and the window manager. ICCCM simply does not understand the concept of non-decorated full-screen windows. Therefore, the best we can do is to request a borderless window and place and resize it to fill the entire screen. Depending on the window manager, this may or may not work. The borderless window is requested using MOTIF hints, which are at least partially supported by virtually all modern window managers.

An alternative would be to bypass the window manager entirely and create a window with the Qt::X11BypassWindowManagerHint flag. This has other severe problems though, like totally broken keyboard focus and very strange effects on desktop changes or when the user raises other windows.

X11 window managers that follow modern post-ICCCM specifications support full-screen mode properly.

See also: showNormal(), showMaximized(), show(), hide(), isVisible()

Definition at line 3185 of file qwidget.cpp.

Referenced by QmlApplicationViewer::showExpanded().

 {
 #ifdef Q_WS_MAC
     // If the unified toolbar is enabled, we have to disable it before going fullscreen.
     QMainWindow *mainWindow = qobject_cast<QMainWindow*>(this);
     if (mainWindow && mainWindow->unifiedTitleAndToolBarOnMac()) {
         mainWindow->setUnifiedTitleAndToolBarOnMac(false);
         QMainWindowLayout *mainLayout = qobject_cast<QMainWindowLayout*>(mainWindow->layout());
         mainLayout->activateUnifiedToolbarAfterFullScreen = true;
     }
 #endif // Q_WS_MAC
     ensurePolished();
 #ifdef QT3_SUPPORT
     if (parent())
         QApplication::sendPostedEvents(parent(), QEvent::ChildInserted);
 #endif
 
     setWindowState((windowState() & ~(Qt::WindowMinimized | Qt::WindowMaximized))
                    | Qt::WindowFullScreen);
     show();
     activateWindow();
 }

◆ showMaximized

void QWidget::showMaximized ( )

slot

Shows the widget maximized.

Calling this function only affects windows.

On X11, this function may not work properly with certain window managers. See the Window Geometry documentation for an explanation.

See also: setWindowState(), showNormal(), showMinimized(), show(), hide(), isVisible()

Definition at line 3218 of file qwidget.cpp.

Referenced by QWorkspace::addWindow(), QMdiAreaPrivate::emitWindowActivated(), QMdiSubWindow::event(), QMdiSubWindow::eventFilter(), main(), QMdiSubWindow::mouseDoubleClickEvent(), QApplication::qwsProcessEvent(), QApplication::qwsSetCustomColors(), QDecoration::regionClicked(), QDecoration::regionDoubleClicked(), QMdiAreaPrivate::setViewMode(), and QmlApplicationViewer::showExpanded().

 {
     ensurePolished();
 #ifdef QT3_SUPPORT
     if (parent())
         QApplication::sendPostedEvents(parent(), QEvent::ChildInserted);
 #endif
 
     setWindowState((windowState() & ~(Qt::WindowMinimized | Qt::WindowFullScreen))
                    | Qt::WindowMaximized);
 #ifdef Q_WS_MAC
     // If the unified toolbar was enabled before going fullscreen, we have to enable it back.
     QMainWindow *mainWindow = qobject_cast<QMainWindow*>(this);
     if (mainWindow)
     {
         QMainWindowLayout *mainLayout = qobject_cast<QMainWindowLayout*>(mainWindow->layout());
         if (mainLayout->activateUnifiedToolbarAfterFullScreen) {
             mainWindow->setUnifiedTitleAndToolBarOnMac(true);
             mainLayout->activateUnifiedToolbarAfterFullScreen = false;
         }
     }
 #endif // Q_WS_MAC
     show();
 }

◆ showMinimized

void QWidget::showMinimized ( )

slot

Shows the widget minimized, as an icon.

Calling this function only affects windows.

See also: showNormal(), showMaximized(), show(), hide(), isVisible(), isMinimized()

Definition at line 3038 of file qwidget.cpp.

Referenced by QWorkspace::addWindow(), QMdiSubWindow::event(), QMdiSubWindow::eventFilter(), QtWndProc(), and QApplication::qwsProcessEvent().

 {
     bool isMin = isMinimized();
     if (isMin && isVisible())
         return;
 
     ensurePolished();
 #ifdef QT3_SUPPORT
     if (parent())
         QApplication::sendPostedEvents(parent(), QEvent::ChildInserted);
 #endif
 
     if (!isMin)
         setWindowState((windowState() & ~Qt::WindowActive) | Qt::WindowMinimized);
     show();
 }

◆ showNormal

void QWidget::showNormal ( )

slot

Restores the widget after it has been maximized or minimized.

Calling this function only affects windows.

See also: setWindowState(), showMinimized(), showMaximized(), show(), hide(), isVisible()

Definition at line 3250 of file qwidget.cpp.

Referenced by QMdiAreaPrivate::_q_deactivateAllWindows(), QMdiSubWindow::event(), QMdiSubWindow::eventFilter(), QMdiSubWindow::mouseDoubleClickEvent(), QApplication::qwsProcessEvent(), QMdiAreaPrivate::rearrange(), QDecoration::regionClicked(), QDecoration::regionDoubleClicked(), and QMdiAreaPrivate::setViewMode().

 {
     ensurePolished();
 #ifdef QT3_SUPPORT
     if (parent())
         QApplication::sendPostedEvents(parent(), QEvent::ChildInserted);
 #endif
 
     setWindowState(windowState() & ~(Qt::WindowMinimized
                                      | Qt::WindowMaximized
                                      | Qt::WindowFullScreen));
 #ifdef Q_WS_MAC
     // If the unified toolbar was enabled before going fullscreen, we have to enable it back.
     QMainWindow *mainWindow = qobject_cast<QMainWindow*>(this);
     if (mainWindow)
     {
         QMainWindowLayout *mainLayout = qobject_cast<QMainWindowLayout*>(mainWindow->layout());
         if (mainLayout->activateUnifiedToolbarAfterFullScreen) {
             mainWindow->setUnifiedTitleAndToolBarOnMac(true);
             mainLayout->activateUnifiedToolbarAfterFullScreen = false;
         }
     }
 #endif // Q_WS_MAC
     show();
 }

◆ size()

QSize QWidget::size ( ) const

Referenced by QPageSetupWidget::_q_paperSizeChanged(), QFontDialogPrivate::_q_sizeChanged(), QFontDialogPrivate::_q_sizeHighlighted(), QMessageBox::about(), QX11EmbedContainerPrivate::acceptClient(), QAxClientSite::activateObject(), QToolBarLayout::checkUsePopupMenu(), QSystemTrayIconSys::createIcon(), QHeaderViewPrivate::createSectionSpan(), QSplitterPrivate::doResize(), QVistaHelper::drawTitleBar(), QMdiSubWindow::event(), QAxHostWidget::event(), QMainWindowTabBar::event(), QWorkspaceChild::eventFilter(), QToolBarLayout::expandedSize(), QPixmap::fill(), fixToolBarOrientation(), QTabWidget::heightForWidth(), QAccessibleDisplay::imagePosition(), QFontDialogPrivate::init(), QTreeViewPrivate::itemDecorationRect(), QAbstractScrollArea::maximumViewportSize(), QGroupBox::minimumSizeHint(), QProgressBar::minimumSizeHint(), QMdiArea::minimumSizeHint(), QAxHostWidget::minimumSizeHint(), QTabBarPrivate::minimumTabSizeHint(), QHeaderView::moveSection(), QDockWidgetTitleButton::paintEvent(), QAxHostWidget::paintEvent(), QTabWidget::paintEvent(), QListView::paintEvent(), QTabBar::paintEvent(), QGraphicsView::paintEvent(), QMdiAreaPrivate::place(), QMenu::popup(), QtWndProc(), QWizardPrivate::QWizardPrivate(), QWidgetPrivate::render_helper(), QWSEmbedWidget::resizeEvent(), QAxWidget::resizeEvent(), QMdiArea::resizeEvent(), restoreGeometry(), QDeclarativeViewPrivate::rootObjectSize(), QDesktopWidget::screenNumber(), scroll(), QColumnView::scrollTo(), QHeaderView::sectionSizeFromContents(), QHeaderView::sectionSizeHint(), QWizardPrivate::setButtonLayout(), QDateTimeEdit::setCurrentSection(), QHeaderViewPrivate::setDefaultSectionSize(), QDockWidget::setFloating(), setGeometry(), QHeaderViewPrivate::setHeaderSectionResizeMode(), QAbstractButton::setIconSize(), QTabBar::setIconSize(), QComboBox::setIconSize(), QAbstractItemView::setIconSize(), QHeaderView::setMinimumSectionSize(), QHeaderView::setOffsetToLastSection(), QDeclarativeView::setRootObject(), QHeaderView::setSectionHidden(), QWizardHeader::setup(), QPageSetupWidget::setupPrinter(), QWSEmbedWidget::showEvent(), QMdiSubWindow::showEvent(), QMdiArea::showEvent(), QDialog::showExtension(), QWorkspaceChild::showShaded(), QScrollBar::sizeHint(), QCommandLinkButton::sizeHint(), QVistaBackButton::sizeHint(), QMdiSubWindow::sizeHint(), QWorkspace::sizeHint(), QProgressBar::sizeHint(), QMDIControl::sizeHint(), QProgressDialog::sizeHint(), QDeclarativeView::sizeHint(), QMdiArea::sizeHint(), QDockWidgetTitleButton::sizeHint(), QGraphicsView::sizeHint(), QTabWidget::sizeHint(), QWizard::sizeHint(), QMdi::ControllerWidget::sizeHint(), QMessageBoxPrivate::updateSize(), and QFontDialogPrivate::updateSizes().

◆ sizeHint()

virtual QSize QWidget::sizeHint ( ) const

virtual

Reimplemented in QWorkspaceChild, QColorPicker, QMdi::ControllerWidget, QMdi::ControlLabel, QFileDialogTreeView, QFileDialogListView, QWorkspaceTitleBar, CloseButton, QComboBox, QMessageBox, QWizard, QSplitterHandle, QInputDialog, QDateTimeEdit, QComboBoxPrivateScroller, QTabBar, DetailButton, QLineEdit, QMenu, QTabWidget, QSidebar, QGraphicsView, QAbstractSpinBox, QDockWidgetTitleButton, QAxHostWidget, QErrorMessageTextView, QLCDNumber, QLabel, QCalendarWidget, QMenuBar, QWellArray, QMdiArea, QDeclarativeView, QProgressDialog, QAbstractScrollArea, QMenuBarExtension, QSplitter, QMDIControl, QProgressBar, QHeaderView, QSlider, QFontComboBox, QDialog, QDial, QToolButton, QAxWidget, QMdiSubWindow, QWorkspace, QFrame, QToolBoxButton, QToolBarSeparator, QScrollArea, QVistaBackButton, QColumnView, QPushButton, QCommandLinkButton, QToolBarExtension, QSvgWidget, QCheckBox, QScrollBar, QScriptEditExtraArea, QRadioButton, QSizeGrip, and QMacNativeWidget.

Referenced by QComboBox::addItems(), adjustSize(), QBalloonTip::balloon(), QToolBar::event(), fixToolBarOrientation(), QMainWindowLayout::insertIntoMacToolbar(), QMainWindowLayout::minimumSize(), QDateTimeEditPrivate::positionCalendarPopup(), restoreGeometry(), QFrame::sizeHint(), QAxWidget::sizeHint(), QDialog::sizeHint(), QAxHostWidget::sizeHint(), and QWorkspaceChild::sizeHint().

◆ sizeIncrement()

QSize QWidget::sizeIncrement ( ) const

Referenced by setDisabled().

◆ sizePolicy()

QSizePolicy QWidget::sizePolicy ( ) const

Referenced by QLabel::minimumSizeHint(), QSplitter::setOrientation(), QProgressBar::setOrientation(), QAbstractSlider::setOrientation(), and takeLayout().

◆ stackUnder()

void QWidget::stackUnder ( QWidget * w )

Places the widget under w in the parent widget's stack.

To make this work, the widget itself and w must be siblings.

See also: raise(), lower()

Definition at line 11972 of file qwidget.cpp.

Referenced by QFocusFrame::eventFilter(), QMdiAreaPrivate::internalRaise(), and QWorkspaceChild::internalRaise().

 {
     Q_D(QWidget);
     QWidget *p = parentWidget();
     if (!w || isWindow() || p != w->parentWidget() || this == w)
         return;
     if (p) {
         int from = p->d_func()->children.indexOf(this);
         int to = p->d_func()->children.indexOf(w);
         Q_ASSERT(from >= 0);
         Q_ASSERT(to >= 0);
         if (from < to)
             --to;
         // Do nothing if the widget is already in correct stacking order _and_ created.
         if (from != to)
             p->d_func()->children.move(from, to);
         if (!testAttribute(Qt::WA_WState_Created) && p->testAttribute(Qt::WA_WState_Created))
             create();
         else if (from == to)
             return;
     }
     if (testAttribute(Qt::WA_WState_Created))
         d->stackUnder_sys(w);
 
     QEvent e(QEvent::ZOrderChange);
     QApplication::sendEvent(this, &e);
 }

◆ statusTip()

QString QWidget::statusTip ( ) const

Referenced by QToolButton::QToolButton(), setStatusTip(), and QListWidgetItem::statusTip().

◆ style()

QStyle * QWidget::style ( ) const

See also: QWidget::setStyle(), QApplication::setStyle(), QApplication::style()

Definition at line 2742 of file qwidget.cpp.

 {
     Q_D(const QWidget);
 
     if (d->extra && d->extra->style)
         return d->extra->style;
     return QApplication::style();
 }

◆ styleChange()

void QWidget::styleChange ( QStyle & style )

protectedvirtual

Warning: This function is not part of the public interface.

Definition at line 12000 of file qwidget.cpp.

Referenced by QApplication::setStyle(), and QWizard::setWizardStyle().

12000 { }

◆ styleSheet()

QString QWidget::styleSheet ( ) const

Referenced by effectiveWinId(), and setStyleSheet().

◆ tabletEvent()

void QWidget::tabletEvent ( QTabletEvent * event )

protectedvirtual

This event handler, for event event, can be reimplemented in a subclass to receive tablet events for the widget.

If you reimplement this handler, it is very important that you ignore() the event if you do not handle it, so that the widget's parent can interpret it.

The default implementation ignores the event.

See also: QTabletEvent::ignore(), QTabletEvent::accept(), event(), QTabletEvent

Definition at line 9347 of file qwidget.cpp.

Referenced by event(), and setShown().

 {
     event->ignore();
 }

◆ takeLayout()

QLayout * QWidget::takeLayout ( )

private

Remove the layout from the widget.

Since: 4.5

Definition at line 10153 of file qwidget.cpp.

Referenced by focusPreviousChild(), and setLayout().

 {
     Q_D(QWidget);
     QLayout *l =  layout();
     if (!l)
         return 0;
     d->layout = 0;
     l->setParent(0);
     return l;
 }

◆ testAttribute()

bool QWidget::testAttribute ( Qt::WidgetAttribute attribute ) const

inline

Returns true if attribute attribute is set on this widget; otherwise returns false.

See also: setAttribute()

Definition at line 1041 of file qwidget.h.

 {
     if (attribute < int(8*sizeof(uint)))
         return data->widget_attributes & (1<<attribute);
     return testAttribute_helper(attribute);
 }

◆ testAttribute_helper()

bool QWidget::testAttribute_helper ( Qt::WidgetAttribute attribute ) const

private

Definition at line 11453 of file qwidget.cpp.

Referenced by focusPreviousChild().

 {
     Q_D(const QWidget);
     const int x = attribute - 8*sizeof(uint);
     const int int_off = x / (8*sizeof(uint));
     return (d->high_attributes[int_off] & (1<<(x-(int_off*8*sizeof(uint)))));
 }

◆ toolTip()

QString QWidget::toolTip ( ) const

Referenced by setToolTip(), QListWidgetItem::toolTip(), QToolBoxPrivate::Page::toolTip(), QSystemTrayIconPrivate::updateToolTip_sys(), QGraphicsView::viewportEvent(), and QSystemTrayIconSys::x11Event().

◆ topLevelWidget()

QWidget * QWidget::topLevelWidget ( ) const

inline

Use window() instead.

Definition at line 328 of file qwidget.h.

328 { return window(); }

QWidget::window

QWidget * window() const

Returns the window for this widget, i.e.

Definition: qwidget.cpp:4492

◆ underMouse()

bool QWidget::underMouse ( ) const

inline

Returns true if the widget is under the mouse cursor; otherwise returns false.

This value is not updated properly during drag and drop operations.

See also: enterEvent(), leaveEvent()

Definition at line 996 of file qwidget.h.

Referenced by QToolBar::event(), QStyleOption::init(), QRadioButton::initStyleOption(), QRadioButton::mouseMoveEvent(), QCheckBox::mouseMoveEvent(), QCommandLinkButton::paintEvent(), QVistaBackButton::paintEvent(), QDockWidgetTitleButton::paintEvent(), CloseButton::paintEvent(), qt_qpa_set_cursor(), qt_win_set_cursor(), QtWndProc(), QGraphicsItem::setCursor(), QBalloonTip::timerEvent(), and QGraphicsItem::unsetCursor().

997 { return testAttribute(Qt::WA_UnderMouse); }

Referenced by QLayout::activate(), QBalloonTip::balloon(), changeEvent(), QPushButton::event(), QX11EmbedContainer::eventFilter(), qt_set_windows_updateScrollBar(), QTabBar::resizeEvent(), QGroupBox::setAlignment(), QToolButton::setArrowType(), QPushButton::setAutoDefault(), QGroupBox::setCheckable(), setContentsMargins(), QCommandLinkButton::setDescription(), QGroupBox::setFlat(), QPushButton::setFlat(), QComboBox::setFrame(), QLineEdit::setFrame(), QAbstractButton::setIcon(), QAbstractButton::setIconSize(), QTabBar::setIconSize(), QComboBox::setIconSize(), QPushButton::setMenu(), QComboBox::setMinimumContentsLength(), QMenuBar::setNativeMenuBar(), QCalendarWidget::setNavigationBarVisible(), QProgressBar::setOrientation(), QAbstractSlider::setOrientation(), QSpinBox::setPrefix(), QComboBox::setSizeAdjustPolicy(), setSizePolicy(), QSpinBox::setSuffix(), QDoubleSpinBox::setSuffix(), QAbstractButton::setText(), QLineEdit::setTextMargins(), QSlider::setTickPosition(), QGroupBox::setTitle(), QToolButton::setToolButtonStyle(), QWizardHeader::setup(), QTabWidget::setUpLayout(), QScrollArea::setWidgetResizable(), QWizard::setWizardStyle(), QComboBox::showEvent(), updateWidgets(), and QX11EmbedContainer::x11Event().

bool testAttribute(Qt::WidgetAttribute) const

Returns true if attribute attribute is set on this widget; otherwise returns false.

Definition: qwidget.h:1041

Qt::WA_UnderMouse

Definition: qnamespace.h:378

◆ ungrabGesture()

void QWidget::ungrabGesture ( Qt::GestureType gesture )

Unsubscribes the widget from a given gesture type.

See also: grabGesture(), QGestureEvent

Since: 4.6

Definition at line 12977 of file qwidget.cpp.

Referenced by QGraphicsScenePrivate::ungrabGesture(), and ~QWidget().

 {
     Q_D(QWidget);
     if (d->gestureContext.remove(gesture)) {
         if (QGestureManager *manager = QGestureManager::instance())
             manager->cleanupCachedGestures(this, gesture);
     }
 }

◆ unsetCursor()

void QWidget::unsetCursor ( )

Definition at line 5311 of file qwidget.cpp.

Referenced by QToolBar::event(), QHeaderView::mouseMoveEvent(), QGraphicsView::setDragMode(), and QGraphicsProxyWidgetPrivate::setWidget_helper().

 {
     Q_D(QWidget);
     if (d->extra) {
         delete d->extra->curs;
         d->extra->curs = 0;
     }
     if (!isWindow())
         setAttribute(Qt::WA_SetCursor, false);
     d->unsetCursor_sys();
 
     QEvent event(QEvent::CursorChange);
     QApplication::sendEvent(this, &event);
 }

◆ unsetLayoutDirection()

void QWidget::unsetLayoutDirection ( )

Definition at line 5217 of file qwidget.cpp.

Referenced by setLayoutDirection().

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_SetLayoutDirection, false);
     d->resolveLayoutDirection();
 }

◆ unsetLocale()

void QWidget::unsetLocale ( )

Definition at line 6178 of file qwidget.cpp.

 {
     Q_D(QWidget);
     setAttribute(Qt::WA_SetLocale, false);
     d->resolveLocale();
 }

◆ update [1/4]

void QWidget::update ( )

slot

Updates the widget unless updates are disabled or the widget is hidden.

This function does not cause an immediate repaint; instead it schedules a paint event for processing when Qt returns to the main event loop. This permits Qt to optimize for more speed and less flicker than a call to repaint() does.

Calling update() several times normally results in just one paintEvent() call.

Qt normally erases the widget's area before the paintEvent() call. If the Qt::WA_OpaquePaintEvent widget attribute is set, the widget is responsible for painting all its pixels with an opaque color.

See also: repaint() paintEvent(), setUpdatesEnabled(), {Analog Clock Example}

Definition at line 10883 of file qwidget.cpp.

 {
     update(rect());
 }

◆ update() [2/4]

void QWidget::update	(	int	x,
		int	y,
		int	w,
		int	h
	)

inline

This version updates a rectangle (x, y, w, h) inside the widget.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 1002 of file qwidget.h.

1003 { update(QRect(ax, ay, aw, ah)); }

QWidget::update

void update()

Updates the widget unless updates are disabled or the widget is hidden.

Definition: qwidget.cpp:10883

QRect

The QRect class defines a rectangle in the plane using integer precision.

Definition: qrect.h:58

◆ update() [3/4]

void QWidget::update ( const QRect & rect )

This version updates a rectangle rect inside the widget.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 10906 of file qwidget.cpp.

 {
     if (!isVisible() || !updatesEnabled())
         return;
 
     QRect r = rect & QWidget::rect();
 
     if (r.isEmpty())
         return;
 
     if (testAttribute(Qt::WA_WState_InPaintEvent)) {
         QApplication::postEvent(this, new QUpdateLaterEvent(r));
         return;
     }
 
     if (hasBackingStoreSupport()) {
 #ifdef QT_MAC_USE_COCOA
         if (qt_widget_private(this)->isInUnifiedToolbar) {
             qt_widget_private(this)->unifiedSurface->renderToolbar(this, true);
             return;
         }
 #endif // QT_MAC_USE_COCOA
         QTLWExtra *tlwExtra = window()->d_func()->maybeTopData();
         if (tlwExtra && !tlwExtra->inTopLevelResize && tlwExtra->backingStore)
             tlwExtra->backingStore->markDirty(r, this);
     } else {
         d_func()->repaint_sys(r);
     }
 }

◆ update() [4/4]

void QWidget::update ( const QRegion & rgn )

This version repaints a region rgn inside the widget.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 10944 of file qwidget.cpp.

 {
     if (!isVisible() || !updatesEnabled() || rgn.isEmpty())
         return;
 
     QRegion r = rgn & QWidget::rect();
 
     if (r.isEmpty())
         return;
 
     if (testAttribute(Qt::WA_WState_InPaintEvent)) {
         QApplication::postEvent(this, new QUpdateLaterEvent(r));
         return;
     }
 
     if (hasBackingStoreSupport()) {
 #ifdef QT_MAC_USE_COCOA
         if (qt_widget_private(this)->isInUnifiedToolbar) {
             qt_widget_private(this)->unifiedSurface->renderToolbar(this, true);
             return;
         }
 #endif // QT_MAC_USE_COCOA
         QTLWExtra *tlwExtra = window()->d_func()->maybeTopData();
         if (tlwExtra && !tlwExtra->inTopLevelResize && tlwExtra->backingStore)
             tlwExtra->backingStore->markDirty(r, this);
     } else {
         d_func()->repaint_sys(r);
     }
 }

◆ updateGeometry()

void QWidget::updateGeometry ( )

Notifies the layout system that this widget has changed and may need to change geometry.

Call this function if the sizeHint() or sizePolicy() have changed.

For explicitly hidden widgets, updateGeometry() is a no-op. The layout system will be notified as soon as the widget is shown.

Definition at line 10372 of file qwidget.cpp.

 {
     Q_D(QWidget);
     d->updateGeometry_helper(false);
 }

◆ updateMicroFocus

void QWidget::updateMicroFocus ( )

protectedslot

Updates the widget's micro focus.

See also: QInputContext

Definition at line 11820 of file qwidget.cpp.

Referenced by QLineEditPrivate::init(), setShown(), QPlainTextEdit::wheelEvent(), and QTextEdit::wheelEvent().

 {
 #if !defined(QT_NO_IM) && (defined(Q_WS_X11) || defined(Q_WS_QWS) || defined(Q_OS_SYMBIAN))
     Q_D(QWidget);
     // and optimization to update input context only it has already been created.
     if (d->assignedInputContext() || qApp->d_func()->inputContext) {
         QInputContext *ic = inputContext();
         if (ic)
             ic->update();
     }
 #endif
 #ifndef QT_NO_ACCESSIBILITY
     if (isVisible()) {
         // ##### is this correct
         QAccessible::updateAccessibility(this, 0, QAccessible::StateChanged);
     }
 #endif
 }

◆ updatesEnabled()

bool QWidget::updatesEnabled ( ) const

inline

Referenced by QWorkspacePrivate::maximizeWindow(), repaint(), QHeaderView::resizeSection(), scroll(), QAbstractItemView::selectionChanged(), QComboBox::showPopup(), underMouse(), and update().

◆ visibleRegion()

QRegion QWidget::visibleRegion ( ) const

Returns the unobscured region where paint events can occur.

For visible widgets, this is an approximation of the area not covered by other widgets; otherwise, this is an empty region.

The repaint() function calls this function if necessary, so in general you do not need to call it.

Definition at line 8404 of file qwidget.cpp.

 {
     Q_D(const QWidget);
 
     QRect clipRect = d->clipRect();
     if (clipRect.isEmpty())
         return QRegion();
     QRegion r(clipRect);
     d->subtractOpaqueChildren(r, clipRect);
     d->subtractOpaqueSiblings(r);
 #ifdef Q_WS_QWS
     const QWSWindowSurface *surface = static_cast<const QWSWindowSurface*>(windowSurface());
     if (surface) {
         const QPoint offset = mapTo(surface->window(), QPoint());
         r &= surface->clipRegion().translated(-offset);
     }
 #endif
     return r;
 }

◆ whatsThis()

QString QWidget::whatsThis ( ) const

Referenced by setWhatsThis(), and QListWidgetItem::whatsThis().

◆ wheelEvent()

void QWidget::wheelEvent ( QWheelEvent * event )

protectedvirtual

This event handler, for event event, can be reimplemented in a subclass to receive wheel events for the widget.

If you reimplement this handler, it is very important that you ignore() the event if you do not handle it, so that the widget's parent can interpret it.

The default implementation ignores the event.

See also: QWheelEvent::ignore(), QWheelEvent::accept(), event(), QWheelEvent

Reimplemented in QCalendarView, QTextEdit, QGraphicsView, QComboBox, QPlainTextEdit, QTabBar, QDateTimeEdit, QSystemTrayIconSys, QMenu, QAbstractSlider, QAbstractSpinBox, QWorkspace, and QAbstractScrollArea.

Definition at line 9326 of file qwidget.cpp.

Referenced by QComboBox::addItems(), event(), setShown(), and QTabBar::wheelEvent().

 {
     event->ignore();
 }

◆ width()

int QWidget::width ( ) const

inline

◆ window()

QWidget * QWidget::window ( ) const

Returns the window for this widget, i.e.

the next ancestor widget that has (or could have) a window-system frame.

If the widget is a window, the widget itself is returned.

Typical usage is changing the window title:

aWidget->window()->setWindowTitle("New Window Title");

See also: isWindow()

Definition at line 4492 of file qwidget.cpp.

 {
     QWidget *w = (QWidget *)this;
     QWidget *p = w->parentWidget();
     while (!w->isWindow() && p) {
         w = p;
         p = p->parentWidget();
     }
     return w;
 }

◆ windowActivationChange()

void QWidget::windowActivationChange ( bool )

protectedvirtual

Warning: This function is not part of the public interface.

Definition at line 12004 of file qwidget.cpp.

Referenced by event(), and QAxClientSite::translateKeyEvent().

12004 { } // compat

◆ windowFilePath()

QString QWidget::windowFilePath ( ) const

Referenced by setWindowFilePath(), and setWindowIcon().

◆ windowFlags()

Qt::WindowFlags QWidget::windowFlags ( ) const

inline

Window flags are a combination of a type (e.

g. Qt::Dialog) and zero or more hints to the window system (e.g. Qt::FramelessWindowHint).

If the widget had type Qt::Widget or Qt::SubWindow and becomes a window (Qt::Window, Qt::Dialog, etc.), it is put at position (0, 0) on the desktop. If the widget is a window and becomes a Qt::Widget or Qt::SubWindow, it is put at position (0, 0) relative to its parent widget.

Note: This function calls setParent() when changing the flags for a window, causing the widget to be hidden. You must call show() to make the widget visible again..

See also: windowType(), {Window Flags Example}

Definition at line 939 of file qwidget.h.

Referenced by QWorkspacePrivate::_q_updateActions(), QMdiArea::addSubWindow(), QMdiAreaPrivate::appendChild(), bypassGraphicsProxyWidget(), QRubberBand::changeEvent(), QGraphicsProxyWidgetPrivate::embedSubWindow(), QMdiSubWindow::event(), QWorkspaceChild::eventFilter(), QDialog::exec(), flipPoint(), QWSWindowSurface::flush(), getNamedAttribute(), getNetWmState(), QMdiAreaPrivate::highlightNextSubWindow(), QWorkspaceChild::internalRaise(), isPopup(), isServerProcess(), make_widget_eventUPP(), QWorkspacePrivate::maximizeWindow(), QWorkspacePrivate::minimizeWindow(), QMdiSubWindow::mouseDoubleClickEvent(), QSizeGrip::mouseMoveEvent(), QSizeGrip::mousePressEvent(), QDecorationWindows::paint(), QDecorationStyled::paint(), QDecorationDefault::paint(), QMdiSubWindow::paintEvent(), QDialog::QDialog(), qstring_to_xtp(), qt_mac_QStringListToNSMutableArrayVoid(), qt_mac_unregister_widget(), qt_mac_updateToolBarButtonHint(), qt_show_system_menu(), qt_wince_maximize(), qt_wince_unmaximize(), qt_x11_recreateWidget(), QtWndProc(), QWizard::QWizard(), QWorkspaceChild::QWorkspaceChild(), QWorkspaceTitleBar::QWorkspaceTitleBar(), QApplication::qwsProcessEvent(), QXcbWindow::QXcbWindow(), QMdiAreaPrivate::rearrange(), QDecorationStyled::region(), QDecorationWindows::region(), QDecorationDefault::region(), QWSDisplay::repaintRegion(), setParent(), QmlJSDebugger::AbstractViewInspector::setShowAppOnTop(), QMdiSubWindowPrivate::setSizeGrip(), QMainWindow::setUnifiedTitleAndToolBarOnMac(), QMdiArea::setupViewport(), QMdi::ControlContainer::showButtonsInMenuBar(), QMdiSubWindow::showEvent(), QWorkspacePrivate::showWindow(), QAccessibleWidget::state(), QWorkspace::tile(), QWorkspaceChild::titleBarDoubleClicked(), QDecorationStyled::titleBarHeight(), QWorkspaceChild::updateMask(), updateRedirectedToGraphicsProxyWidget(), QMdiAreaPrivate::windowStaysOnTop(), and QApplication::winFocus().

940 { return data->window_flags; }

QWidgetData::window_flags

Qt::WindowFlags window_flags

Definition: qwidget.h:119

Referenced by QSizeGripPrivate::_q_showIfNotHidden(), activateWindow(), QDecoration::buildSysMenu(), QMdiSubWindow::changeEvent(), QMdiSubWindowPrivate::ensureWindowState(), QDialog::event(), QMainWindow::event(), QMeeGoGraphicsSystemSwitchHandler::eventFilter(), QWorkspaceChild::eventFilter(), getNamedAttribute(), QApplicationPrivate::globalEventProcessor(), QVistaHelper::mouseMoveEvent(), QVistaHelper::mousePressEvent(), QDecorationStyled::paint(), QDecorationDefault::paint(), QtWndProc(), QDecorationWindows::region(), QDecorationDefault::region(), QDecoration::regionClicked(), QDecoration::regionDoubleClicked(), QBBScreen::resizeWindows(), restoreGeometry(), saveGeometry(), QMdiSubWindowPrivate::setActive(), QWorkspace::setActiveWindow(), QDialog::setVisible(), setVisible(), QDialog::showEvent(), showFullScreen(), showMaximized(), QWorkspaceChild::showMaximized(), showMinimized(), QWorkspaceChild::showMinimized(), showNormal(), QWorkspaceChild::showNormal(), QWorkspaceTitleBarPrivate::titleBarState(), and QWorkspaceChild::updateMask().

QWidgetData * data

Definition: qwidget.h:815

◆ windowIcon()

QIcon QWidget::windowIcon ( ) const

Referenced by QMessageBox::about(), QMdiAreaPrivate::appendChild(), QMdi::ControlContainer::ControlContainer(), QVistaHelper::drawTitleBar(), QMdiSubWindow::event(), QMdiArea::eventFilter(), QMdiSubWindow::QMdiSubWindow(), QMdiAreaPrivate::setViewMode(), QMdiSubWindow::setWidget(), setWindowTitle(), QVistaHelper::titleOffset(), and QMdi::ControlLabel::updateWindowIcon().

◆ windowIconText()

QString QWidget::windowIconText ( ) const

Referenced by QtWndProc(), setWindowIcon(), setWindowIconText(), and setWindowModified().

◆ windowModality()

Qt::WindowModality QWidget::windowModality ( ) const

Referenced by QWidgetPrivate::inheritStyle(), QDialog::open(), QColorDialog::setVisible(), and setWindowModality().

◆ windowOpacity()

qreal QWidget::windowOpacity ( ) const

Referenced by testAttribute_helper(), and QComboBoxPrivate::updateViewContainerPaletteAndOpacity().

◆ windowRole()

QString QWidget::windowRole ( ) const

Returns the window's role, or an empty string.

See also: windowIcon, windowTitle

Definition at line 6483 of file qwidget.cpp.

 {
     Q_D(const QWidget);
     return (d->extra && d->extra->topextra) ? d->extra->topextra->role : QString();
 }

◆ windowState()

Qt::WindowStates QWidget::windowState ( ) const

Returns the current window state.

The window state is a OR'ed combination of Qt::WindowState: Qt::WindowMinimized, Qt::WindowMaximized, Qt::WindowFullScreen, and Qt::WindowActive.

See also: Qt::WindowState setWindowState()

Definition at line 3086 of file qwidget.cpp.

 {
     return Qt::WindowStates(data->window_state);
 }

◆ windowSurface()

QWindowSurface * QWidget::windowSurface ( ) const

Returns the QWindowSurface this widget will be drawn into.

This function is under development and subject to change.

Since: 4.2

Definition at line 12819 of file qwidget.cpp.

Referenced by QWidgetBackingStore::beginPaint(), PvrEglScreenSurfaceFunctions::createNativeWindow(), QXcbWindow::handleExposeEvent(), QApplicationPrivate::isAlien(), QWidgetPrivate::paintSiblingsRecursive(), QWidgetBackingStore::QWidgetBackingStore(), setAttribute(), QDirectFbWindow::setGeometry(), setParent(), QMainWindow::setUnifiedTitleAndToolBarOnMac(), QDirectFBScreen::surfaceForWidget(), QWidgetBackingStore::sync(), QETWidget::translateRegionEvent(), visibleRegion(), QDirectFBScreen::windowForWidget(), and QWindowSurface::~QWindowSurface().

 {
     Q_D(const QWidget);
     QTLWExtra *extra = d->maybeTopData();
     if (extra && extra->windowSurface)
         return extra->windowSurface;
 
     QWidgetBackingStore *bs = d->maybeBackingStore();
 
 #ifdef Q_BACKINGSTORE_SUBSURFACES
     if (bs && bs->subSurfaces.isEmpty())
         return bs->windowSurface;
 
     if (!isTopLevel()) {
         const QWidget *w = parentWidget();
         while (w) {
             QTLWExtra *extra = w->d_func()->maybeTopData();
             if (extra && extra->windowSurface)
                 return extra->windowSurface;
             if (w->isTopLevel())
                 break;
             w = w->parentWidget();
         }
     }
 #endif // Q_BACKINGSTORE_SUBSURFACES
 
     return bs ? bs->windowSurface : 0;
 }

◆ windowTitle()

◆ windowType()

Qt::WindowType QWidget::windowType ( ) const

inline

Returns the window type of this widget.

This is identical to windowFlags() & Qt::WindowType_Mask.

See also: windowFlags

Definition at line 937 of file qwidget.h.

Referenced by activateWindow(), QBBScreen::addWindow(), QApplicationPrivate::applyX11SpecificCommandLineArguments(), backgroundRole(), QCoreGraphicsPaintEngine::begin(), clearFocus(), QApplication::closeAllWindows(), QApplicationPrivate::closePopup(), QShortcutMap::correctWidgetContext(), create(), QWidgetPrivate::create_sys(), QGLGraphicsSystem::createWindowSurface(), QApplication::desktop(), destroy(), DllCanUnloadNow(), QApplicationPrivate::enterModal(), QMacStyle::event(), QApplication::event(), event(), QX11Data::findClientWindow(), findRealWindow(), findWindowThatShouldDisplayMenubar(), focusNextPrevChild(), QApplicationPrivate::focusNextPrevChild_helper(), QApplicationPrivate::globalEventProcessor(), handle_xdnd_position(), QWidgetPrivate::init(), isTransient(), keyPressEvent(), QAbstractScrollAreaPrivate::layoutChildren(), QApplicationPrivate::leaveModal(), make_win_eventUPP(), QX11Data::motifdndObtainData(), mousePressEvent(), QWindowsXPStyle::pixelMetric(), QWindowsStyle::pixelMetric(), QMacStyle::pixelMetric(), QWidgetPrivate::pointToRect(), previousInFocusChain(), q_createNativeChildrenAndSetParent(), qt_event_activate_timer_callbk(), qt_mac_grabScreenRect_10_3(), qt_mac_is_macdrawer(), qt_mac_is_macsheet(), qt_sizegrip_topLevelWidget(), qt_xdnd_send_leave(), QtWndProc(), QApplication::qwsProcessEvent(), QMdiAreaPrivate::resizeToMinimumTileSize(), setDisabled(), setFocus(), setParent(), QBBWindow::setScreen(), QApplication::setStyle(), setVisible(), QFocusFrame::setWidget(), QWidgetPrivate::setWinId(), QCoreFuriCuri::timerEvent(), QApplication::topLevelWidgets(), topLevelWidgets(), QETWidget::translateMouseEvent(), unstylable(), updateRedirectedToGraphicsProxyWidget(), QApplication::winFocus(), QApplication::x11ProcessEvent(), xdndEnable(), and xdndObtainData().

938 { return static_cast<Qt::WindowType>(int(data->window_flags & Qt::WindowType_Mask)); }

Qt::WindowType

WindowType

Definition: qnamespace.h:270

Qt::WindowType_Mask

Definition: qnamespace.h:283

QWidgetData::window_flags

Qt::WindowFlags window_flags

Definition: qwidget.h:119