#include <qabstractscrollarea_p.h>

Inheritance diagram for QAbstractScrollAreaPrivate:

Public Functions
void	_q_hslide (int)

void	_q_showOrHideScrollBars ()

void	_q_vslide (int)

virtual QPoint	contentsOffset () const

void	init ()

void	layoutChildren ()

	QAbstractScrollAreaPrivate ()

void	replaceScrollBar (QScrollBar *scrollBar, Qt::Orientation orientation)

virtual void	scrollBarPolicyChanged (Qt::Orientation, Qt::ScrollBarPolicy)

void	setSingleFingerPanEnabled (bool on=true)

bool	viewportEvent (QEvent *event)

Public Functions inherited from QFramePrivate
void	init ()

	QFramePrivate ()

void	updateFrameWidth ()
	Updated the frameWidth parameter. More...

void	updateStyledFrameWidths ()
	Updates the frame widths from the style. More...

Public Functions inherited from QWidgetPrivate
void	_q_showIfNotHidden ()

virtual void	aboutToDestroy ()

void	activateChildLayoutsRecursively ()

QSize	adjustedSize () const

void	adjustQuitOnCloseAttribute ()

QInputContext *	assignedInputContext () const

QPainter *	beginSharedPainter ()

QWidget *	childAt_helper (const QPoint &, bool) const

QWidget *	childAtRecursiveHelper (const QPoint &p, bool, bool includeFrame=false) const

QRect	clipRect () const

QRegion	clipRegion () const

void	clipToEffectiveMask (QRegion &region) const

bool	close_helper (CloseMode mode)

void	create_sys (WId window, bool initializeWindow, bool destroyOldWindow)

QWindowSurface *	createDefaultWindowSurface ()

QWindowSurface *	createDefaultWindowSurface_sys ()

void	createExtra ()
	Creates the widget extra data. More...

void	createRecursively ()

void	createSysExtra ()

void	createTLExtra ()

void	createTLSysExtra ()

void	createWinId (WId id=0)

void	deactivateWidgetCleanup ()

void	deleteExtra ()
	Deletes the widget extra data. More...

void	deleteSysExtra ()

void	deleteTLSysExtra ()

void	drawWidget (QPaintDevice pdev, const QRegion &rgn, const QPoint &offset, int flags, QPainter sharedPainter=0, QWidgetBackingStore *backingStore=0)

QWidget *	effectiveFocusWidget ()

QRect	effectiveRectFor (const QRect &rect) const

bool	endSharedPainter ()

void	enforceNativeChildren ()

QWExtra *	extraData () const

QRect	frameStrut () const

void	getLayoutItemMargins (int left, int top, int right, int bottom) const

const QRegion &	getOpaqueChildren () const

void	handleSoftwareInputPanel (Qt::MouseButton button, bool clickCausedFocus)

virtual bool	hasHeightForWidth () const

void	hide_helper ()

void	hide_sys ()
	Platform-specific part of QWidget::hide(). More...

void	hideChildren (bool spontaneous)

void	inheritStyle ()

void	init (QWidget *desktopWidget, Qt::WindowFlags f)

QInputContext *	inputContext () const

void	invalidateBuffer (const QRegion &)
	Invalidates the rgn (in widget's coordinates) of the backing store, i.e. More...

void	invalidateBuffer (const QRect &)
	This function is equivalent to calling invalidateBuffer(QRegion(rect), ...), but is more efficient as it eliminates QRegion operations/allocations and can use the rect more precisely for additional cut-offs. More...

void	invalidateBuffer_resizeHelper (const QPoint &oldPos, const QSize &oldSize)
	Invalidates the buffer when the widget is resized. More...

void	invalidateGraphicsEffectsRecursively ()

bool	isAboutToShow () const

bool	isBackgroundInherited () const

bool	isOverlapped (const QRect &) const

void	lower_sys ()

QPoint	mapFromGlobal (const QPoint &pos) const

QPoint	mapToGlobal (const QPoint &pos) const

QWidgetBackingStore *	maybeBackingStore () const

QTLWExtra *	maybeTopData () const

void	moveRect (const QRect &, int dx, int dy)

bool	nativeChildrenForced () const

QFont	naturalWidgetFont (uint inheritedMask) const

QPalette	naturalWidgetPalette (uint inheritedMask) const
	Returns the palette that the widget w inherits from its ancestors and QApplication::palette. More...

void	paintBackground (QPainter *, const QRegion &, int flags=DrawAsRoot) const

bool	paintOnScreen () const

void	paintSiblingsRecursive (QPaintDevice pdev, const QObjectList &children, int index, const QRegion &rgn, const QPoint &offset, int flags, QPainter sharedPainter, QWidgetBackingStore *backingStore)

bool	pointInsideRectAndMask (const QPoint &) const

QRegion	prepareToRender (const QRegion &region, QWidget::RenderFlags renderFlags)

void	propagatePaletteChange ()
	Propagate this widget's palette to all children, except style sheet widgets, and windows that don't enable window propagation (palettes don't normally propagate to windows). More...

	QWidgetPrivate (int version=QObjectPrivateVersion)

void	raise_sys ()

QPaintDevice *	redirected (QPoint *offset) const

void	registerDropSite (bool)

void	render (QPaintDevice *target, const QPoint &targetOffset, const QRegion &sourceRegion, QWidget::RenderFlags renderFlags, bool readyToRender)

void	render_helper (QPainter *painter, const QPoint &targetOffset, const QRegion &sourceRegion, QWidget::RenderFlags renderFlags)

void	repaint_sys (const QRegion &rgn)

void	reparentFocusWidgets (QWidget *oldtlw)

void	resolveFont ()
	Determine which font is implicitly imposed on this widget by its ancestors and QApplication::font, resolve this against its own font (attributes from the implicit font are copied over). More...

void	resolveLayoutDirection ()

void	resolveLocale ()

void	resolvePalette ()
	Determine which palette is inherited from this widget's ancestors and QApplication::palette, resolve this against this widget's palette (attributes from the inherited palette are copied over this widget's palette). More...

void	restoreRedirected ()

void	scroll_sys (int dx, int dy)

void	scroll_sys (int dx, int dy, const QRect &r)

void	scrollChildren (int dx, int dy)

void	scrollRect (const QRect &, int dx, int dy)

void	sendPendingMoveAndResizeEvents (bool recursive=false, bool disableUpdates=false)

void	sendStartupMessage (const char *message) const
	Platform-specific part of QWidget::show(). More...

void	setConstraints_sys ()

void	setCursor_sys (const QCursor &cursor)

void	setDirtyOpaqueRegion ()

void	setEnabled_helper (bool)

void	setFocus_sys ()

void	setFont_helper (const QFont &font)

void	setGeometry_sys (int, int, int, int, bool)

void	setLayoutDirection_helper (Qt::LayoutDirection)

void	setLayoutItemMargins (int left, int top, int right, int bottom)

void	setLayoutItemMargins (QStyle::SubElement element, const QStyleOption *opt=0)

void	setLocale_helper (const QLocale &l, bool forceUpdate=false)

void	setMask_sys (const QRegion &)

bool	setMaximumSize_helper (int &maxw, int &maxh)

bool	setMinimumSize_helper (int &minw, int &minh)

void	setModal_sys ()

void	setNetWmWindowTypes ()

void	setOpaque (bool opaque)

void	setPalette_helper (const QPalette &)

void	setParent_sys (QWidget *parent, Qt::WindowFlags)

void	setRedirected (QPaintDevice *replacement, const QPoint &offset)

void	setSharedPainter (QPainter *painter)

void	setStyle_helper (QStyle *newStyle, bool propagate, bool metalHack=false)

void	setUpdatesEnabled_helper (bool)

void	setWindowFilePath_helper (const QString &filePath)

void	setWindowIcon_helper ()

void	setWindowIcon_sys (bool forceReset=false)

void	setWindowIconText_helper (const QString &cap)

void	setWindowIconText_sys (const QString &cap)

void	setWindowOpacity_sys (qreal opacity)

void	setWindowRole ()

void	setWindowTitle_helper (const QString &cap)

void	setWindowTitle_sys (const QString &cap)

void	setWinId (WId)

QPainter *	sharedPainter () const

void	show_helper ()

void	show_recursive ()
	Makes the widget visible in the isVisible() meaning of the word. More...

void	show_sys ()
	Platform-specific part of QWidget::show(). More...

void	showChildren (bool spontaneous)

void	stackUnder_sys (QWidget *)

void	subtractOpaqueChildren (QRegion &rgn, const QRect &clipRect) const

void	subtractOpaqueSiblings (QRegion &source, bool *hasDirtySiblingsAbove=0, bool alsoNonOpaque=false) const

void	syncBackingStore ()

void	syncBackingStore (const QRegion &region)

QTLWExtra *	topData () const

void	unsetCursor_sys ()

void	updateFont (const QFont &)
	Assign font to this widget, and propagate it to all children, except style sheet widgets (handled differently) and windows that don't enable window propagation. More...

void	updateFrameStrut ()
	Computes the frame rectangle when needed. More...

void	updateGeometry_helper (bool forceUpdate)

void	updateIsOpaque ()

void	updateIsTranslucent ()

void	updateSystemBackground ()

void	updateX11AcceptFocus ()

void	x11UpdateIsOpaque ()

	~QWidgetPrivate ()

Public Functions inherited from QObjectPrivate
void	_q_reregisterTimers (void *pointer)

void	addConnection (int signal, Connection *c)

void	cleanConnectionLists ()

void	connectNotify (const char *signal)

void	deleteChildren ()

void	disconnectNotify (const char *signal)

bool	isSender (const QObject receiver, const char signal) const

bool	isSignalConnected (uint signalIdx) const
	Returns true if the signal with index signal_index from object sender is connected. More...

void	moveToThread_helper ()

	QObjectPrivate (int version=QObjectPrivateVersion)

QObjectList	receiverList (const char *signal) const

QObjectList	senderList () const

void	setParent_helper (QObject *)

void	setThreadData_helper (QThreadData currentData, QThreadData targetData)

int	signalIndex (const char *signalName) const
	Returns the signal index used in the internal connectionLists vector. More...

virtual	~QObjectPrivate ()

Public Functions inherited from QObjectData
virtual	~QObjectData ()=0

Public Variables
int	bottom

QRect	cornerPaintingRect

QWidget *	cornerWidget

QScrollBar *	hbar

Qt::ScrollBarPolicy	hbarpolicy

int	left

QRect	reverseCornerPaintingRect

int	right

QAbstractScrollAreaScrollBarContainer *	scrollBarContainers [Qt::Vertical+1]

bool	singleFingerPanEnabled

int	top

QScrollBar *	vbar

Qt::ScrollBarPolicy	vbarpolicy

QWidget *	viewport

QScopedPointer< QObject >	viewportFilter

int	xoffset

int	yoffset

Public Variables inherited from QFramePrivate
short	bottomFrameWidth

int	frameStyle

short	frameWidth

QRect	frect

short	leftFrameWidth

short	lineWidth

short	midLineWidth

short	rightFrameWidth

short	topFrameWidth

Public Variables inherited from QWidgetPrivate
QString	accessibleDescription

QString	accessibleName

QList< QAction * >	actions

QPalette::ColorRole	bg_role: 8

signed char	bottomLayoutItemMargin

short	bottommargin

QWidgetData	data

QRegion	dirty

uint	dirtyOpaqueChildren: 1

QWExtra *	extra

QPaintEngine *	extraPaintEngine

QPalette::ColorRole	fg_role: 8

QWidget *	focus_child

QWidget *	focus_next

QWidget *	focus_prev

QMap< Qt::GestureType, Qt::GestureFlags >	gestureContext

QGraphicsEffect *	graphicsEffect

Qt::HANDLE	hd

uint	high_attributes [4]

QPointer< QInputContext >	ic

Qt::InputMethodHints	imHints

uint	inDirtyList: 1

uint	inheritedFontResolveMask

uint	inheritedPaletteResolveMask

uint	inheritsInputMethodHints: 1

uint	inSetParent: 1

uint	isGLWidget: 1

uint	isMoved: 1

uint	isOpaque: 1

uint	isScrolled: 1

QLayout *	layout

signed char	leftLayoutItemMargin

short	leftmargin

QLocale	locale

QRegion *	needsFlush

QRegion	opaqueChildren

Qt::HANDLE	picture

const QMetaObject *	polished

QPaintDevice *	redirectDev

QPoint	redirectOffset

signed char	rightLayoutItemMargin

short	rightmargin

QSizePolicy	size_policy

QString	statusTip

QString	toolTip

signed char	topLayoutItemMargin

short	topmargin

uint	usesDoubleBufferedGLContext: 1

QString	whatsThis

QWidgetItemV2 *	widgetItem

QX11Info	xinfo

Public Variables inherited from QObjectPrivate
union {
QObject * currentChildBeingDeleted

QAbstractDeclarativeData * declarativeData

};

quint32	connectedSignals [2]

QObjectConnectionListVector *	connectionLists

Sender *	currentSender

QList< QPointer< QObject > >	eventFilters

ExtraData *	extraData

QString	objectName

Connection *	senders

QAtomicPointer< QtSharedPointer::ExternalRefCountData >	sharedRefcount

QThreadData *	threadData

void *	unused

Public Variables inherited from QObjectData
uint	blockSig: 1

QObjectList	children

uint	hasGuards: 1

uint	inEventHandler: 1

uint	inThreadChangeEvent: 1

uint	isWidget: 1

QMetaObject *	metaObject

uint	ownObjectName: 1

QObject *	parent

uint	pendTimer: 1

int	postedEvents

QObject *	q_ptr

uint	receiveChildEvents: 1

uint	sendChildEvents: 1

uint	unused: 22

uint	wasDeleted: 1

Additional Inherited Members
Public Types inherited from QWidgetPrivate
enum	CloseMode { CloseNoEvent, CloseWithEvent, CloseWithSpontaneousEvent }

enum	Direction { DirectionNorth = 0x01, DirectionEast = 0x10, DirectionSouth = 0x02, DirectionWest = 0x20 }

enum	DrawWidgetFlags { DrawAsRoot = 0x01, DrawPaintOnScreen = 0x02, DrawRecursive = 0x04, DrawInvisible = 0x08, DontSubtractOpaqueChildren = 0x10, DontSetCompositionMode = 0x20, DontDrawOpaqueChildren = 0x40, DontDrawNativeChildren = 0x80 }

Public Types inherited from QObjectPrivate
typedef void(*	StaticMetaCallFunction) (QObject , QMetaObject::Call, int, void *)

Static Public Functions inherited from QWidgetPrivate
static void	adjustFlags (Qt::WindowFlags &flags, QWidget *w=0)

static QGraphicsProxyWidget *	nearestGraphicsProxyWidget (const QWidget *origin)
	Finds the nearest widget embedded in a graphics proxy widget along the chain formed by this widget and its ancestors. More...

static int	pointToRect (const QPoint &p, const QRect &r)

static QRect	screenGeometry (const QWidget *widget)

Static Public Functions inherited from QObjectPrivate
static void	clearGuards (QObject *)

static QObjectPrivate *	get (QObject *o)

static void	resetCurrentSender (QObject receiver, Sender currentSender, Sender *previousSender)

static Sender *	setCurrentSender (QObject receiver, Sender sender)

static void	signalSignature (const QMetaMethod &signal, QVarLengthArray< char > *result)

Static Public Variables inherited from QWidgetPrivate
static QWidgetSet *	allWidgets = 0

static int	instanceCounter = 0

static QWidget *	keyboardGrabber = 0

static QWidgetMapper *	mapper = 0

static int	maxInstances = 0

static QWidget *	mouseGrabber = 0

Detailed Description

Definition at line 65 of file qabstractscrollarea_p.h.

Constructors and Destructors

◆ QAbstractScrollAreaPrivate()

QAbstractScrollAreaPrivate::QAbstractScrollAreaPrivate ( )

Definition at line 161 of file qabstractscrollarea.cpp.

     :hbar(0), vbar(0), vbarpolicy(Qt::ScrollBarAsNeeded), hbarpolicy(Qt::ScrollBarAsNeeded),
      viewport(0), cornerWidget(0), left(0), top(0), right(0), bottom(0),
      xoffset(0), yoffset(0), viewportFilter(0)
 #ifdef Q_WS_WIN
      , singleFingerPanEnabled(false)
 #endif
 {
 }

Functions

◆ _q_hslide()

void QAbstractScrollAreaPrivate::_q_hslide ( int x )

Definition at line 1350 of file qabstractscrollarea.cpp.

 {
     Q_Q(QAbstractScrollArea);
     int dx = xoffset - x;
     xoffset = x;
     q->scrollContentsBy(dx, 0);
 }

◆ _q_showOrHideScrollBars()

void QAbstractScrollAreaPrivate::_q_showOrHideScrollBars ( )

Definition at line 1366 of file qabstractscrollarea.cpp.

Referenced by QTextEditPrivate::_q_adjustScrollbars().

 {
     layoutChildren();
 #ifdef Q_WS_WIN
     // Need to re-subscribe to gestures as the content changes to make sure we
     // enable/disable panning when needed.
     QWidgetPrivate *dd = static_cast<QWidgetPrivate *>(QObjectPrivate::get(viewport));
     if (dd)
         dd->winSetupGestures();
 #endif // Q_WS_WIN
 }

◆ _q_vslide()

void QAbstractScrollAreaPrivate::_q_vslide ( int y )

Definition at line 1358 of file qabstractscrollarea.cpp.

 {
     Q_Q(QAbstractScrollArea);
     int dy = yoffset - y;
     yoffset = y;
     q->scrollContentsBy(0, dy);
 }

◆ contentsOffset()

QPoint QAbstractScrollAreaPrivate::contentsOffset ( ) const

virtual

Reimplemented in QAbstractItemViewPrivate.

Definition at line 1378 of file qabstractscrollarea.cpp.

Referenced by QStyleSheetStyle::drawPrimitive(), and QWidgetPrivate::paintBackground().

 {
     Q_Q(const QAbstractScrollArea);
     QPoint offset;
     if (vbar->isVisible())
         offset.setY(vbar->value());
     if (hbar->isVisible()) {
         if (q->isRightToLeft())
             offset.setX(hbar->maximum() - hbar->value());
         else
             offset.setX(hbar->value());
     }
     return offset;
 }

◆ init()

void QAbstractScrollAreaPrivate::init ( )

Definition at line 280 of file qabstractscrollarea.cpp.

 {
     Q_Q(QAbstractScrollArea);
     viewport = new QWidget(q);
     viewport->setObjectName(QLatin1String("qt_scrollarea_viewport"));
     viewport->setBackgroundRole(QPalette::Base);
     viewport->setAutoFillBackground(true);
     scrollBarContainers[Qt::Horizontal] = new QAbstractScrollAreaScrollBarContainer(Qt::Horizontal, q);
     scrollBarContainers[Qt::Horizontal]->setObjectName(QLatin1String("qt_scrollarea_hcontainer"));
     hbar = scrollBarContainers[Qt::Horizontal]->scrollBar;
     hbar->setRange(0,0);
     scrollBarContainers[Qt::Horizontal]->setVisible(false);
     QObject::connect(hbar, SIGNAL(valueChanged(int)), q, SLOT(_q_hslide(int)));
     QObject::connect(hbar, SIGNAL(rangeChanged(int,int)), q, SLOT(_q_showOrHideScrollBars()), Qt::QueuedConnection);
     scrollBarContainers[Qt::Vertical] = new QAbstractScrollAreaScrollBarContainer(Qt::Vertical, q);
     scrollBarContainers[Qt::Vertical]->setObjectName(QLatin1String("qt_scrollarea_vcontainer"));
     vbar = scrollBarContainers[Qt::Vertical]->scrollBar;
     vbar->setRange(0,0);
     scrollBarContainers[Qt::Vertical]->setVisible(false);
     QObject::connect(vbar, SIGNAL(valueChanged(int)), q, SLOT(_q_vslide(int)));
     QObject::connect(vbar, SIGNAL(rangeChanged(int,int)), q, SLOT(_q_showOrHideScrollBars()), Qt::QueuedConnection);
     viewportFilter.reset(new QAbstractScrollAreaFilter(this));
     viewport->installEventFilter(viewportFilter.data());
     viewport->setFocusProxy(q);
     q->setFocusPolicy(Qt::WheelFocus);
     q->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
     q->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
     layoutChildren();
 #ifndef Q_WS_MAC
 #ifndef QT_NO_GESTURES
     viewport->grabGesture(Qt::PanGesture);
 #endif
 #endif
 }

◆ layoutChildren()

void QAbstractScrollAreaPrivate::layoutChildren ( )

Definition at line 325 of file qabstractscrollarea.cpp.

Referenced by QListViewPrivate::doItemsLayout().

 {
     Q_Q(QAbstractScrollArea);
     bool needh = (hbarpolicy == Qt::ScrollBarAlwaysOn
                   || (hbarpolicy == Qt::ScrollBarAsNeeded && hbar->minimum() < hbar->maximum()));
 
     bool needv = (vbarpolicy == Qt::ScrollBarAlwaysOn
                   || (vbarpolicy == Qt::ScrollBarAsNeeded && vbar->minimum() < vbar->maximum()));
 
 #ifdef Q_WS_MAC
     QWidget * const window = q->window();
 
     // Use small scroll bars for tool windows, to match the native size grip.
     bool hbarIsSmall = hbar->testAttribute(Qt::WA_MacSmallSize);
     bool vbarIsSmall = vbar->testAttribute(Qt::WA_MacSmallSize);
     const Qt::WindowType windowType = window->windowType();
     if (windowType == Qt::Tool) {
         if (!hbarIsSmall) {
             hbar->setAttribute(Qt::WA_MacMiniSize, false);
             hbar->setAttribute(Qt::WA_MacNormalSize, false);
             hbar->setAttribute(Qt::WA_MacSmallSize, true);
         }
         if (!vbarIsSmall) {
             vbar->setAttribute(Qt::WA_MacMiniSize, false);
             vbar->setAttribute(Qt::WA_MacNormalSize, false);
             vbar->setAttribute(Qt::WA_MacSmallSize, true);
         }
     } else {
         if (hbarIsSmall) {
             hbar->setAttribute(Qt::WA_MacMiniSize, false);
             hbar->setAttribute(Qt::WA_MacNormalSize, false);
             hbar->setAttribute(Qt::WA_MacSmallSize, false);
         }
         if (vbarIsSmall) {
             vbar->setAttribute(Qt::WA_MacMiniSize, false);
             vbar->setAttribute(Qt::WA_MacNormalSize, false);
             vbar->setAttribute(Qt::WA_MacSmallSize, false);
         }
      }
 #endif
 
     const int hsbExt = hbar->sizeHint().height();
     const int vsbExt = vbar->sizeHint().width();
     const QPoint extPoint(vsbExt, hsbExt);
     const QSize extSize(vsbExt, hsbExt);
 
     const QRect widgetRect = q->rect();
     QStyleOption opt(0);
     opt.init(q);
 
     const bool hasCornerWidget = (cornerWidget != 0);
 
 // If the scroll bars are at the very right and bottom of the window we
 // move their positions to be aligned with the size grip.
 #ifdef Q_WS_MAC
     // Check if a native sizegrip is present.
     bool hasMacReverseSizeGrip = false;
     bool hasMacSizeGrip = false;
     bool nativeGripPresent = false;
     if (q->testAttribute(Qt::WA_WState_Created))
         nativeGripPresent = qt_mac_checkForNativeSizeGrip(q);
 
     if (nativeGripPresent) {
         // Look for a native size grip at the visual window bottom right and at the
         // absolute window bottom right. In reverse mode, the native size grip does not
         // swich side, so we need to check if it is on the "wrong side".
         const QPoint scrollAreaBottomRight = q->mapTo(window, widgetRect.bottomRight() - QPoint(frameWidth, frameWidth));
         const QPoint windowBottomRight = window->rect().bottomRight();
         const QPoint visualWindowBottomRight = QStyle::visualPos(opt.direction, opt.rect, windowBottomRight);
         const QPoint offset = windowBottomRight - scrollAreaBottomRight;
         const QPoint visualOffset = visualWindowBottomRight - scrollAreaBottomRight;
         hasMacSizeGrip = (visualOffset.manhattanLength() < vsbExt);
         hasMacReverseSizeGrip = (hasMacSizeGrip == false && (offset.manhattanLength() < hsbExt));
     }
 #endif
 
     QPoint cornerOffset(needv ? vsbExt : 0, needh ? hsbExt : 0);
     QRect controlsRect;
     QRect viewportRect;
 
     // In FrameOnlyAroundContents mode the frame is drawn between the controls and
     // the viewport, else the frame rect is equal to the widget rect.
     if ((frameStyle != QFrame::NoFrame) &&
         q->style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents, &opt, q)) {
         controlsRect = widgetRect;
         const int extra = q->style()->pixelMetric(QStyle::PM_ScrollView_ScrollBarSpacing, &opt, q);
         const QPoint cornerExtra(needv ? extra : 0, needh ? extra : 0);
         QRect frameRect = widgetRect;
         frameRect.adjust(0, 0, -cornerOffset.x() - cornerExtra.x(), -cornerOffset.y() - cornerExtra.y());
         q->setFrameRect(QStyle::visualRect(opt.direction, opt.rect, frameRect));
         // The frame rect needs to be in logical coords, however we need to flip
         // the contentsRect back before passing it on to the viewportRect
         // since the viewportRect has its logical coords calculated later.
         viewportRect = QStyle::visualRect(opt.direction, opt.rect, q->contentsRect());
     } else {
         q->setFrameRect(QStyle::visualRect(opt.direction, opt.rect, widgetRect));
         controlsRect = q->contentsRect();
         viewportRect = QRect(controlsRect.topLeft(), controlsRect.bottomRight() - cornerOffset);
     }
 
     // If we have a corner widget and are only showing one scroll bar, we need to move it
     // to make room for the corner widget.
     if (hasCornerWidget && (needv || needh))
         cornerOffset =  extPoint;
 
 #ifdef Q_WS_MAC
     // Also move the scroll bars if they are covered by the native Mac size grip.
     if (hasMacSizeGrip)
         cornerOffset =  extPoint;
 #endif
 
     // The corner point is where the scroll bar rects, the corner widget rect and the
     // viewport rect meets.
     const QPoint cornerPoint(controlsRect.bottomRight() + QPoint(1, 1) - cornerOffset);
 
     // Some styles paints the corner if both scorllbars are showing and there is
     // no corner widget. Also, on the Mac we paint if there is a native
     // (transparent) sizegrip in the area where a corner widget would be.
     if ((needv && needh && hasCornerWidget == false)
         || ((needv || needh) 
 #ifdef Q_WS_MAC
         && hasMacSizeGrip
 #endif
         )
     ) {
         cornerPaintingRect = QStyle::visualRect(opt.direction, opt.rect, QRect(cornerPoint, extSize));
     } else {
         cornerPaintingRect = QRect();
     }
 
 #ifdef Q_WS_MAC
     if (hasMacReverseSizeGrip)
         reverseCornerPaintingRect = QRect(controlsRect.bottomRight() + QPoint(1, 1) - extPoint, extSize);
     else
         reverseCornerPaintingRect = QRect();
 #endif
 
     if (needh) {
         QRect horizontalScrollBarRect(QPoint(controlsRect.left(), cornerPoint.y()), QPoint(cornerPoint.x() - 1, controlsRect.bottom()));
 #ifdef Q_WS_MAC
         if (hasMacReverseSizeGrip)
             horizontalScrollBarRect.adjust(vsbExt, 0, 0, 0);
 #endif
         scrollBarContainers[Qt::Horizontal]->setGeometry(QStyle::visualRect(opt.direction, opt.rect, horizontalScrollBarRect));
         scrollBarContainers[Qt::Horizontal]->raise();
     }
 
     if (needv) {
         const QRect verticalScrollBarRect  (QPoint(cornerPoint.x(), controlsRect.top()),  QPoint(controlsRect.right(), cornerPoint.y() - 1));
         scrollBarContainers[Qt::Vertical]->setGeometry(QStyle::visualRect(opt.direction, opt.rect, verticalScrollBarRect));
         scrollBarContainers[Qt::Vertical]->raise();
     }
 
     if (cornerWidget) {
         const QRect cornerWidgetRect(cornerPoint, controlsRect.bottomRight());
         cornerWidget->setGeometry(QStyle::visualRect(opt.direction, opt.rect, cornerWidgetRect));
     }
 
     scrollBarContainers[Qt::Horizontal]->setVisible(needh);
     scrollBarContainers[Qt::Vertical]->setVisible(needv);
 
     if (q->isRightToLeft())
         viewportRect.adjust(right, top, -left, -bottom);
     else
         viewportRect.adjust(left, top, -right, -bottom);
 
     viewport->setGeometry(QStyle::visualRect(opt.direction, opt.rect, viewportRect)); // resize the viewport last
 }

◆ replaceScrollBar()

void QAbstractScrollAreaPrivate::replaceScrollBar	(	QScrollBar *	scrollBar,
		Qt::Orientation	orientation
	)

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

Definition at line 245 of file qabstractscrollarea.cpp.

 {
     Q_Q(QAbstractScrollArea);
 
     QAbstractScrollAreaScrollBarContainer *container = scrollBarContainers[orientation];
     bool horizontal = (orientation == Qt::Horizontal);
     QScrollBar *oldBar = horizontal ? hbar : vbar;
     if (horizontal)
         hbar = scrollBar;
     else
         vbar = scrollBar;
     scrollBar->setParent(container);
     container->scrollBar = scrollBar;
     container->layout->removeWidget(oldBar);
     container->layout->insertWidget(0, scrollBar);
     scrollBar->setVisible(oldBar->isVisibleTo(container));
     scrollBar->setInvertedAppearance(oldBar->invertedAppearance());
     scrollBar->setInvertedControls(oldBar->invertedControls());
     scrollBar->setRange(oldBar->minimum(), oldBar->maximum());
     scrollBar->setOrientation(oldBar->orientation());
     scrollBar->setPageStep(oldBar->pageStep());
     scrollBar->setSingleStep(oldBar->singleStep());
     scrollBar->setSliderDown(oldBar->isSliderDown());
     scrollBar->setSliderPosition(oldBar->sliderPosition());
     scrollBar->setTracking(oldBar->hasTracking());
     scrollBar->setValue(oldBar->value());
     delete oldBar;
 
     QObject::connect(scrollBar, SIGNAL(valueChanged(int)),
                      q, horizontal ? SLOT(_q_hslide(int)) : SLOT(_q_vslide(int)));
     QObject::connect(scrollBar, SIGNAL(rangeChanged(int,int)),
                      q, SLOT(_q_showOrHideScrollBars()), Qt::QueuedConnection);
 }

◆ scrollBarPolicyChanged()

virtual void QAbstractScrollAreaPrivate::scrollBarPolicyChanged	(	Qt::Orientation	,
		Qt::ScrollBarPolicy
	)

inlinevirtual

Reimplemented in QMdiAreaPrivate.

Definition at line 91 of file qabstractscrollarea_p.h.

91 {}

◆ setSingleFingerPanEnabled()

void QAbstractScrollAreaPrivate::setSingleFingerPanEnabled ( bool on = true )

Definition at line 316 of file qabstractscrollarea.cpp.

Referenced by QTextEditPrivate::init(), and QPlainTextEditPrivate::init().

 {
     singleFingerPanEnabled = on;
     QWidgetPrivate *dd = static_cast<QWidgetPrivate *>(QObjectPrivate::get(viewport));
     if (dd)
         dd->winSetupGestures();
 }

◆ viewportEvent()

bool QAbstractScrollAreaPrivate::viewportEvent ( QEvent * event )

inline

Definition at line 99 of file qabstractscrollarea_p.h.

100 { return q_func()->viewportEvent(event); }

Properties

◆ bottom

int QAbstractScrollAreaPrivate::bottom

Definition at line 84 of file qabstractscrollarea_p.h.

Referenced by QIconModeViewBase::dataChanged(), QGraphicsViewPrivate::recalculateContentSize(), and QMdiAreaPrivate::resizeToMinimumTileSize().

◆ cornerPaintingRect

QRect QAbstractScrollAreaPrivate::cornerPaintingRect

Definition at line 80 of file qabstractscrollarea_p.h.

◆ cornerWidget

QWidget* QAbstractScrollAreaPrivate::cornerWidget

Definition at line 79 of file qabstractscrollarea_p.h.

◆ hbar

QScrollBar* QAbstractScrollAreaPrivate::hbar

Definition at line 75 of file qabstractscrollarea_p.h.

Referenced by QTextEditPrivate::_q_adjustScrollbars(), QPlainTextEditPrivate::_q_adjustScrollbars(), QTextEditPrivate::_q_ensureVisible(), QTextBrowserPrivate::createHistoryEntry(), QTextEditPrivate::horizontalOffset(), QTextEditPrivate::init(), QAbstractItemViewPrivate::init(), QPlainTextEditPrivate::init(), QListViewPrivate::prepareItemsLayout(), QGraphicsViewPrivate::recalculateContentSize(), QMdiAreaPrivate::resizeToMinimumTileSize(), QTextBrowserPrivate::restoreHistoryEntry(), QTextBrowserPrivate::setSource(), QGraphicsViewPrivate::updateScroll(), QMdiAreaPrivate::updateScrollBars(), and QMdiAreaPrivate::updateTabBarGeometry().

◆ hbarpolicy

Qt::ScrollBarPolicy QAbstractScrollAreaPrivate::hbarpolicy

Definition at line 76 of file qabstractscrollarea_p.h.

Referenced by QMdiAreaPrivate::appendChild(), QListViewPrivate::prepareItemsLayout(), QGraphicsViewPrivate::recalculateContentSize(), QMdiAreaPrivate::resizeToMinimumTileSize(), QMdiAreaPrivate::scrollBarsEnabled(), and QMdiAreaPrivate::updateScrollBars().

◆ left

int QAbstractScrollAreaPrivate::left

Definition at line 84 of file qabstractscrollarea_p.h.

Referenced by QGraphicsViewPrivate::recalculateContentSize(), and QMdiAreaPrivate::resizeToMinimumTileSize().

◆ reverseCornerPaintingRect

QRect QAbstractScrollAreaPrivate::reverseCornerPaintingRect

Definition at line 82 of file qabstractscrollarea_p.h.

◆ right

int QAbstractScrollAreaPrivate::right

Definition at line 84 of file qabstractscrollarea_p.h.

Referenced by QListModeViewBase::indexToListViewItem(), QGraphicsViewPrivate::recalculateContentSize(), and QMdiAreaPrivate::resizeToMinimumTileSize().

◆ scrollBarContainers

QAbstractScrollAreaScrollBarContainer* QAbstractScrollAreaPrivate::scrollBarContainers[Qt::Vertical+1]

Definition at line 74 of file qabstractscrollarea_p.h.

◆ singleFingerPanEnabled

bool QAbstractScrollAreaPrivate::singleFingerPanEnabled

Definition at line 104 of file qabstractscrollarea_p.h.

◆ top

int QAbstractScrollAreaPrivate::top

Definition at line 84 of file qabstractscrollarea_p.h.

Referenced by QGraphicsViewPrivate::recalculateContentSize(), and QMdiAreaPrivate::resizeToMinimumTileSize().

◆ vbar

QScrollBar * QAbstractScrollAreaPrivate::vbar

Definition at line 75 of file qabstractscrollarea_p.h.

Referenced by QTextEditPrivate::_q_adjustScrollbars(), QPlainTextEditPrivate::_q_adjustScrollbars(), QTextEditPrivate::_q_ensureVisible(), QTextBrowserPrivate::createHistoryEntry(), QTextEditPrivate::init(), QAbstractItemViewPrivate::init(), QPlainTextEditPrivate::init(), QTextEditPrivate::pageUpDown(), QListViewPrivate::prepareItemsLayout(), QGraphicsViewPrivate::recalculateContentSize(), QMdiAreaPrivate::resizeToMinimumTileSize(), QTextBrowserPrivate::restoreHistoryEntry(), QTextBrowserPrivate::setSource(), QGraphicsViewPrivate::updateScroll(), QMdiAreaPrivate::updateScrollBars(), QMdiAreaPrivate::updateTabBarGeometry(), and QTextEditPrivate::verticalOffset().

◆ vbarpolicy

Qt::ScrollBarPolicy QAbstractScrollAreaPrivate::vbarpolicy

Definition at line 76 of file qabstractscrollarea_p.h.

Referenced by QMdiAreaPrivate::appendChild(), QListViewPrivate::prepareItemsLayout(), QGraphicsViewPrivate::recalculateContentSize(), QMdiAreaPrivate::resizeToMinimumTileSize(), QMdiAreaPrivate::scrollBarsEnabled(), and QMdiAreaPrivate::updateScrollBars().

◆ viewport

QWidget* QAbstractScrollAreaPrivate::viewport

Definition at line 78 of file qabstractscrollarea_p.h.

◆ viewportFilter

QScopedPointer<QObject> QAbstractScrollAreaPrivate::viewportFilter

Definition at line 101 of file qabstractscrollarea_p.h.

◆ xoffset

int QAbstractScrollAreaPrivate::xoffset

Definition at line 86 of file qabstractscrollarea_p.h.

◆ yoffset

int QAbstractScrollAreaPrivate::yoffset

Definition at line 86 of file qabstractscrollarea_p.h.

The documentation for this class was generated from the following files:

/src/gui/widgets/qabstractscrollarea_p.h
/src/gui/widgets/qabstractscrollarea.cpp

Public Functions

Public Variables

Additional Inherited Members

Detailed Description

Constructors and Destructors

◆ QAbstractScrollAreaPrivate()

Functions

◆ _q_hslide()

◆ _q_showOrHideScrollBars()

◆ _q_vslide()

◆ contentsOffset()

◆ init()

◆ layoutChildren()

◆ replaceScrollBar()

◆ scrollBarPolicyChanged()

◆ setSingleFingerPanEnabled()

◆ viewportEvent()

Properties

◆ bottom

◆ cornerPaintingRect

◆ cornerWidget

◆ hbar

◆ hbarpolicy

◆ left

◆ reverseCornerPaintingRect

◆ right

◆ scrollBarContainers

◆ singleFingerPanEnabled

◆ top

◆ vbar

◆ vbarpolicy

◆ viewport

◆ viewportFilter

◆ xoffset

◆ yoffset