The QMessageBox class provides a modal dialog for informing the user or for asking the user a question and receiving an answer. More...

#include <qmessagebox.h>

Inheritance diagram for QMessageBox:

Public Types
typedef StandardButton	Button
	Use QMessageBox::StandardButton instead. More...

enum	ButtonRole { InvalidRole = -1, AcceptRole, RejectRole, DestructiveRole, ActionRole, HelpRole, YesRole, NoRole, ResetRole, ApplyRole, NRoles }
	Combinations of these roles are as flags used to describe different aspects of their behavior. More...

enum	Icon { NoIcon = 0, Information = 1, Warning = 2, Critical = 3, Question = 4 }
	This enum has the following values: More...

enum	StandardButton { NoButton = 0x00000000, Ok = 0x00000400, Save = 0x00000800, SaveAll = 0x00001000, Open = 0x00002000, Yes = 0x00004000, YesToAll = 0x00008000, No = 0x00010000, NoToAll = 0x00020000, Abort = 0x00040000, Retry = 0x00080000, Ignore = 0x00100000, Close = 0x00200000, Cancel = 0x00400000, Discard = 0x00800000, Help = 0x01000000, Apply = 0x02000000, Reset = 0x04000000, RestoreDefaults = 0x08000000, FirstButton = Ok, LastButton = RestoreDefaults, YesAll = YesToAll, NoAll = NoToAll, Default = 0x00000100, Escape = 0x00000200, FlagMask = 0x00000300, ButtonMask = ~FlagMask }
	These enums describe flags for standard buttons. More...

Public Types inherited from QDialog
enum	DialogCode { Rejected, Accepted }
	The value returned by a modal dialog. More...

Public Types inherited from QWidget
enum	RenderFlag { DrawWindowBackground = 0x1, DrawChildren = 0x2, IgnoreMask = 0x4 }
	This enum describes how to render the widget when calling QWidget::render(). More...

Public Types inherited from QPaintDevice
enum	PaintDeviceMetric { PdmWidth = 1, PdmHeight, PdmWidthMM, PdmHeightMM, PdmNumColors, PdmDepth, PdmDpiX, PdmDpiY, PdmPhysicalDpiX, PdmPhysicalDpiY }

Public Slots
int	exec ()
	Shows the message box as a modal dialog, blocking until the user closes it. More...

Public Slots inherited from QDialog
virtual void	accept ()
	Hides the modal dialog and sets the result code to `Accepted`. More...

virtual void	done (int)
	Closes the dialog and sets its result code to r. More...

int	exec ()
	Shows the dialog as a modal dialog, blocking until the user closes it. More...

void	open ()
	Shows the dialog as a window modal dialog, returning immediately. More...

virtual void	reject ()
	Hides the modal dialog and sets the result code to `Rejected`. More...

void	showExtension (bool)
	If showIt is true, the dialog's extension is shown; otherwise the extension is hidden. More...

Public Slots inherited from QWidget
bool	close ()
	Closes this widget. More...

void	hide ()
	Hides the widget. More...

void	lower ()
	Lowers the widget to the bottom of the parent widget's stack. More...

void	raise ()
	Raises this widget to the top of the parent widget's stack. More...

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

void	setDisabled (bool)
	Disables widget input events if disable is true; otherwise enables input events. More...

void	setEnabled (bool)

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

void	setHidden (bool hidden)
	Convenience function, equivalent to setVisible(!hidden). More...

QT_MOC_COMPAT void	setShown (bool shown)
	Use setVisible(shown) instead. More...

void	setStyleSheet (const QString &styleSheet)

void	setWindowModified (bool)

void	setWindowTitle (const QString &)

void	show ()
	Shows the widget and its child widgets. More...

void	showFullScreen ()
	Shows the widget in full-screen mode. More...

void	showMaximized ()
	Shows the widget maximized. More...

void	showMinimized ()
	Shows the widget minimized, as an icon. More...

void	showNormal ()
	Restores the widget after it has been maximized or minimized. More...

void	update ()
	Updates the widget unless updates are disabled or the widget is hidden. More...

Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...

Signals
void	buttonClicked (QAbstractButton *button)
	This signal is emitted whenever a button is clicked inside the QMessageBox. More...

Signals inherited from QDialog
void	accepted ()
	This signal is emitted when the dialog has been accepted either by the user or by calling accept() or done() with the QDialog::Accepted argument. More...

void	finished (int result)
	This signal is emitted when the dialog's result code has been set, either by the user or by calling done(), accept(), or reject(). More...

void	rejected ()
	This signal is emitted when the dialog has been rejected either by the user or by calling reject() or done() with the QDialog::Rejected argument. More...

Signals inherited from QWidget
void	customContextMenuRequested (const QPoint &pos)
	This signal is emitted when the widget's contextMenuPolicy is Qt::CustomContextMenu, and the user has requested a context menu on the widget. More...

Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...

Public Functions
void	addButton (QAbstractButton *button, ButtonRole role)
	Adds the given button to the message box with the specified role. More...

QPushButton *	addButton (const QString &text, ButtonRole role)
	Creates a button with the given text, adds it to the message box for the specified role, and returns it. More...

QPushButton *	addButton (StandardButton button)
	Adds a standard button to the message box if it is valid to do so, and returns the push button. More...

QAbstractButton *	button (StandardButton which) const
	Returns a pointer corresponding to the standard button which, or 0 if the standard button doesn't exist in this message box. More...

ButtonRole	buttonRole (QAbstractButton *button) const
	Returns the button role for the specified button. More...

QList< QAbstractButton * >	buttons () const
	Returns a list of all the buttons that have been added to the message box. More...

QString	buttonText (int button) const
	Returns the text of the message box button button, or an empty string if the message box does not contain the button. More...

QAbstractButton *	clickedButton () const
	Returns the button that was clicked by the user, or 0 if the user hit the Esc key and no escape button was set. More...

QPushButton *	defaultButton () const
	Returns the button that should be the message box's default button. More...

QString	detailedText () const

QAbstractButton *	escapeButton () const
	Returns the button that is activated when escape is pressed. More...

Icon	icon () const

QPixmap	iconPixmap () const

QString	informativeText () const

void	open (QObject receiver, const char member)
	Opens the dialog and connects its finished() or buttonClicked() signal to the slot specified by receiver and member. More...

	QMessageBox (QWidget *parent=0)
	Constructs a message box with no text and no buttons. More...

	QMessageBox (Icon icon, const QString &title, const QString &text, StandardButtons buttons=NoButton, QWidget *parent=0, Qt::WindowFlags flags=Qt::Dialog\|Qt::MSWindowsFixedSizeDialogHint)
	Constructs a message box with the given icon, title, text, and standard buttons. More...

	QMessageBox (const QString &title, const QString &text, Icon icon, int button0, int button1, int button2, QWidget *parent=0, Qt::WindowFlags f=Qt::Dialog\|Qt::MSWindowsFixedSizeDialogHint)
	Constructs a message box with a title, a text, an icon, and up to three buttons. More...

void	removeButton (QAbstractButton *button)
	Removes button from the button box without deleting it. More...

void	setButtonText (int button, const QString &text)
	Sets the text of the message box button button to text. More...

void	setDefaultButton (QPushButton *button)
	Sets the message box's default button to button. More...

void	setDefaultButton (StandardButton button)
	Sets the message box's default button to button. More...

void	setDetailedText (const QString &text)

void	setEscapeButton (QAbstractButton *button)
	Sets the button that gets activated when the Escape key is pressed to button. More...

void	setEscapeButton (StandardButton button)
	Sets the buttons that gets activated when the Escape key is pressed to button. More...

void	setIcon (Icon)

void	setIconPixmap (const QPixmap &pixmap)

void	setInformativeText (const QString &text)

void	setStandardButtons (StandardButtons buttons)

void	setText (const QString &text)

void	setTextFormat (Qt::TextFormat format)

void	setVisible (bool visible)
	Reimplemented Function More...

void	setWindowModality (Qt::WindowModality windowModality)
	This function shadows QWidget::setWindowModality(). More...

void	setWindowTitle (const QString &title)
	This function shadows QWidget::setWindowTitle(). More...

QSize	sizeHint () const

StandardButton	standardButton (QAbstractButton *button) const
	Returns the standard button enum value corresponding to the given button, or NoButton if the given button isn't a standard button. More...

StandardButtons	standardButtons () const

QString	text () const

Qt::TextFormat	textFormat () const

	~QMessageBox ()
	Destroys the message box. More...

Public Functions inherited from QDialog
QWidget *	extension () const
	Returns the dialog's extension or 0 if no extension has been defined. More...

bool	isSizeGripEnabled () const

QSize	minimumSizeHint () const
	Reimplemented Function More...

Qt::Orientation	orientation () const
	Returns the dialog's extension orientation. More...

	QDialog (QWidget *parent=0, Qt::WindowFlags f=0)
	Constructs a dialog with parent parent. More...

int	result () const
	In general returns the modal dialog's result code, `Accepted` or `Rejected`. More...

void	setExtension (QWidget *extension)
	Sets the widget, extension, to be the dialog's extension, deleting any previous extension. More...

void	setModal (bool modal)

void	setOrientation (Qt::Orientation orientation)
	If orientation is Qt::Horizontal, the extension will be displayed to the right of the dialog's main area. More...

void	setResult (int r)
	Sets the modal dialog's result code to i. More...

void	setSizeGripEnabled (bool)

	~QDialog ()
	Destroys the QDialog, deleting all its children. More...

Public Functions inherited from QWidget
bool	acceptDrops () const

QString	accessibleDescription () const

QString	accessibleName () const

QList< QAction * >	actions () const
	Returns the (possibly empty) list of this widget's actions. More...

void	activateWindow ()
	Sets the top-level widget containing this widget to be the active window. More...

void	addAction (QAction *action)
	Appends the action action to this widget's list of actions. More...

void	addActions (QList< QAction *> actions)
	Appends the actions actions to this widget's list of actions. More...

void	adjustSize ()
	Adjusts the size of the widget to fit its contents. More...

bool	autoFillBackground () const

QPalette::ColorRole	backgroundRole () const
	Returns the background role of the widget. More...

QSize	baseSize () const

QWidget *	childAt (int x, int y) const
	Returns the visible child widget at the position ({x}, {y}) in the widget's coordinate system. More...

QWidget *	childAt (const QPoint &p) const
	Returns the visible child widget at point p in the widget's own coordinate system. More...

QRect	childrenRect () const

QRegion	childrenRegion () const

void	clearFocus ()
	Takes keyboard input focus from the widget. More...

void	clearMask ()
	Removes any mask set by setMask(). More...

QMargins	contentsMargins () const
	The contentsMargins function returns the widget's contents margins. More...

QRect	contentsRect () const
	Returns the area inside the widget's margins. More...

Qt::ContextMenuPolicy	contextMenuPolicy () const

void	createWinId ()

QCursor	cursor () const

int	devType () const

WId	effectiveWinId () const
	Returns the effective window system identifier of the widget, i. More...

void	ensurePolished () const
	Ensures that the widget has been polished by QStyle (i.e., has a proper font and palette). More...

Qt::FocusPolicy	focusPolicy () const

QWidget *	focusProxy () const
	Returns the focus proxy, or 0 if there is no focus proxy. More...

QWidget *	focusWidget () const
	Returns the last child of this widget that setFocus had been called on. More...

const QFont &	font () const

QFontInfo	fontInfo () const
	Returns the font info for the widget's current font. More...

QFontMetrics	fontMetrics () const
	Returns the font metrics for the widget's current font. More...

QPalette::ColorRole	foregroundRole () const
	Returns the foreground role. More...

QRect	frameGeometry () const

QSize	frameSize () const

const QRect &	geometry () const

void	getContentsMargins (int left, int top, int right, int bottom) const
	Returns the widget's contents margins for left, top, right, and bottom. More...

HDC	getDC () const
	Returns the window system handle of the widget, for low-level access. More...

void	grabGesture (Qt::GestureType type, Qt::GestureFlags flags=Qt::GestureFlags())
	Subscribes the widget to a given gesture with specific flags. More...

void	grabKeyboard ()
	Grabs the keyboard input. More...

void	grabMouse ()
	Grabs the mouse input. More...

void	grabMouse (const QCursor &)

int	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. More...

QGraphicsEffect *	graphicsEffect () const
	The graphicsEffect function returns a pointer to the widget's graphics effect. More...

QGraphicsProxyWidget *	graphicsProxyWidget () const
	Returns the proxy widget for the corresponding embedded widget in a graphics view; otherwise returns 0. More...

bool	hasFocus () const

bool	hasMouseTracking () const

int	height () const

virtual int	heightForWidth (int) const
	Returns the preferred height for this widget, given the width w. More...

QInputContext *	inputContext ()
	This function returns the QInputContext for this widget. More...

Qt::InputMethodHints	inputMethodHints () const

virtual QVariant	inputMethodQuery (Qt::InputMethodQuery) const
	This method is only relevant for input widgets. More...

void	insertAction (QAction before, QAction action)
	Inserts the action action to this widget's list of actions, before the action before. More...

void	insertActions (QAction before, QList< QAction > actions)
	Inserts the actions actions to this widget's list of actions, before the action before. More...

WId	internalWinId () const
	Returns the window system identifier of the widget, or 0 if the widget is not created yet. More...

bool	isActiveWindow () const

bool	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. More...

bool	isEnabled () const

bool	isEnabledTo (QWidget *) const
	Returns true if this widget would become enabled if ancestor is enabled; otherwise returns false. More...

bool	isEnabledToTLW () const
	This function is deprecated. More...

bool	isFullScreen () const

bool	isHidden () const
	Returns true if the widget is hidden, otherwise returns false. More...

bool	isLeftToRight () const

bool	isMaximized () const

bool	isMinimized () const

bool	isModal () const

bool	isRightToLeft () const

bool	isTopLevel () const
	Use isWindow() instead. More...

bool	isVisible () const

bool	isVisibleTo (QWidget *) const
	Returns true if this widget would become visible if ancestor is shown; otherwise returns false. More...

bool	isWindow () const
	Returns true if the widget is an independent window, otherwise returns false. More...

bool	isWindowModified () const

QLayout *	layout () const
	Returns the layout manager that is installed on this widget, or 0 if no layout manager is installed. More...

Qt::LayoutDirection	layoutDirection () const

QLocale	locale () const

Qt::HANDLE	macCGHandle () const
	Returns the CoreGraphics handle of the widget. More...

Qt::HANDLE	macQDHandle () const
	Returns the QuickDraw handle of the widget. More...

QPoint	mapFrom (QWidget *, const QPoint &) const
	Translates the widget coordinate pos from the coordinate system of parent to this widget's coordinate system. More...

QPoint	mapFromGlobal (const QPoint &) const
	Translates the global screen coordinate pos to widget coordinates. More...

QPoint	mapFromParent (const QPoint &) const
	Translates the parent widget coordinate pos to widget coordinates. More...

QPoint	mapTo (QWidget *, const QPoint &) const
	Translates the widget coordinate pos to the coordinate system of parent. More...

QPoint	mapToGlobal (const QPoint &) const
	Translates the widget coordinate pos to global screen coordinates. More...

QPoint	mapToParent (const QPoint &) const
	Translates the widget coordinate pos to a coordinate in the parent widget. More...

QRegion	mask () const
	Returns the mask currently set on a widget. More...

int	maximumHeight () const

QSize	maximumSize () const

int	maximumWidth () const

int	minimumHeight () const

QSize	minimumSize () const

int	minimumWidth () const

void	move (int x, int y)
	This corresponds to move(QPoint(x, y)). More...

void	move (const QPoint &)

QWidget *	nativeParentWidget () const
	Returns the native parent for this widget, i. More...

QWidget *	nextInFocusChain () const
	Returns the next widget in this widget's focus chain. More...

QRect	normalGeometry () const

void	overrideWindowFlags (Qt::WindowFlags type)
	Sets the window flags for the widget to flags, without telling the window system. More...

void	overrideWindowState (Qt::WindowStates state)

QPaintEngine *	paintEngine () const
	Returns the widget's paint engine. More...

const QPalette &	palette () const

QWidget *	parentWidget () const
	Returns the parent of this widget, or 0 if it does not have any parent widget. More...

QPoint	pos () const

QWidget *	previousInFocusChain () const
	The previousInFocusChain function returns the previous widget in this widget's focus chain. More...

	QWidget (QWidget *parent=0, Qt::WindowFlags f=0)
	Constructs a widget which is a child of parent, with widget flags set to f. More...

QRect	rect () const

void	releaseDC (HDC) const
	Releases the HDC hdc acquired by a previous call to getDC(). More...

void	releaseKeyboard ()
	Releases the keyboard grab. More...

void	releaseMouse ()
	Releases the mouse grab. More...

void	releaseShortcut (int id)
	Removes the shortcut with the given id from Qt's shortcut system. More...

void	removeAction (QAction *action)
	Removes the action action from this widget's list of actions. More...

void	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. More...

void	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(). More...

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

void	repaint (const QRect &)
	This version repaints a rectangle rect inside the widget. More...

void	repaint (const QRegion &)
	This version repaints a region rgn inside the widget. More...

void	resize (int w, int h)
	This corresponds to resize(QSize(w, h)). More...

void	resize (const QSize &)

bool	restoreGeometry (const QByteArray &geometry)
	Restores the geometry and state top-level widgets stored in the byte array geometry. More...

QByteArray	saveGeometry () const
	Saves the current geometry and state for top-level widgets. More...

void	scroll (int dx, int dy)
	Scrolls the widget including its children dx pixels to the right and dy downward. More...

void	scroll (int dx, int dy, const QRect &)
	This version only scrolls r and does not move the children of the widget. More...

void	setAcceptDrops (bool on)

void	setAccessibleDescription (const QString &description)

void	setAccessibleName (const QString &name)

void	setAttribute (Qt::WidgetAttribute, bool on=true)
	Sets the attribute attribute on this widget if on is true; otherwise clears the attribute. More...

void	setAutoFillBackground (bool enabled)

void	setBackgroundRole (QPalette::ColorRole)
	Sets the background role of the widget to role. More...

void	setBaseSize (const QSize &)

void	setBaseSize (int basew, int baseh)
	This corresponds to setBaseSize(QSize(basew, baseh)). More...

void	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. More...

void	setContentsMargins (const QMargins &margins)
	The setContentsMargins function sets the margins around the widget's contents. More...

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	setCursor (const QCursor &)

void	setFixedHeight (int h)
	Sets both the minimum and maximum heights of the widget to h without changing the widths. More...

void	setFixedSize (const QSize &)
	Sets both the minimum and maximum sizes of the widget to s, thereby preventing it from ever growing or shrinking. More...

void	setFixedSize (int w, int h)
	Sets the width of the widget to w and the height to h. More...

void	setFixedWidth (int w)
	Sets both the minimum and maximum width of the widget to w without changing the heights. More...

void	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. More...

void	setFocusPolicy (Qt::FocusPolicy policy)

void	setFocusProxy (QWidget *)
	Sets the widget's focus proxy to widget w. More...

void	setFont (const QFont &)
	Use the single-argument overload instead. More...

void	setForegroundRole (QPalette::ColorRole)
	Sets the foreground role of the widget to role. More...

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 only in what argument(s) it accepts.This corresponds to setGeometry(QRect(x, y, w, h)). More...

void	setGeometry (const QRect &)

void	setGraphicsEffect (QGraphicsEffect *effect)
	The setGraphicsEffect function is for setting the widget's graphics effect. More...

void	setInputContext (QInputContext *)
	This function sets the input context context on this widget. More...

void	setInputMethodHints (Qt::InputMethodHints hints)

void	setLayout (QLayout *)
	Sets the layout manager for this widget to layout. More...

void	setLayoutDirection (Qt::LayoutDirection direction)

void	setLocale (const QLocale &locale)

void	setMask (const QBitmap &)
	Causes only the pixels of the widget for which bitmap has a corresponding 1 bit to be visible. More...

void	setMask (const QRegion &)
	Causes only the parts of the widget which overlap region to be visible. More...

void	setMaximumHeight (int maxh)

void	setMaximumSize (const QSize &)

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

void	setMaximumWidth (int maxw)

void	setMinimumHeight (int minh)

void	setMinimumSize (const QSize &)

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

void	setMinimumWidth (int minw)

void	setMouseTracking (bool enable)

void	setPalette (const QPalette &)
	Use the single-argument overload instead. More...

void	setParent (QWidget *parent)
	Sets the parent of the widget to parent, and resets the window flags. More...

void	setParent (QWidget *parent, Qt::WindowFlags f)
	This function also takes widget flags, f as an argument. More...

void	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. More...

void	setShortcutEnabled (int id, bool enable=true)
	If enable is true, the shortcut with the given id is enabled; otherwise the shortcut is disabled. More...

void	setSizeIncrement (const QSize &)

void	setSizeIncrement (int w, int h)
	Sets the x (width) size increment to w and the y (height) size increment to h. More...

void	setSizePolicy (QSizePolicy)

void	setSizePolicy (QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical)
	Sets the size policy of the widget to horizontal and vertical, with standard stretch and no height-for-width. More...

void	setStatusTip (const QString &)

void	setStyle (QStyle *)
	Sets the widget's GUI style to style. More...

void	setToolTip (const QString &)

void	setUpdatesEnabled (bool enable)

void	setupUi (QWidget *widget)
	Sets up the user interface for the specified widget. More...

void	setWhatsThis (const QString &)

void	setWindowFilePath (const QString &filePath)

void	setWindowFlags (Qt::WindowFlags type)

void	setWindowIcon (const QIcon &icon)

void	setWindowIconText (const QString &)

void	setWindowModality (Qt::WindowModality windowModality)

void	setWindowOpacity (qreal level)

void	setWindowRole (const QString &)
	Sets the window's role to role. More...

void	setWindowState (Qt::WindowStates state)
	Sets the window state to windowState. More...

void	setWindowSurface (QWindowSurface *surface)
	Sets the window surface to be the surface specified. More...

QSize	size () const

QSize	sizeIncrement () const

QSizePolicy	sizePolicy () const

void	stackUnder (QWidget *)
	Places the widget under w in the parent widget's stack. More...

QString	statusTip () const

QStyle *	style () const

QString	styleSheet () const

bool	testAttribute (Qt::WidgetAttribute) const
	Returns true if attribute attribute is set on this widget; otherwise returns false. More...

QString	toolTip () const

QWidget *	topLevelWidget () const

bool	underMouse () const
	Returns true if the widget is under the mouse cursor; otherwise returns false. More...

void	ungrabGesture (Qt::GestureType type)
	Unsubscribes the widget from a given gesture type. More...

void	unsetCursor ()

void	unsetLayoutDirection ()

void	unsetLocale ()

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

void	update (const QRect &)
	This version updates a rectangle rect inside the widget. More...

void	update (const QRegion &)
	This version repaints a region rgn inside the widget. More...

void	updateGeometry ()
	Notifies the layout system that this widget has changed and may need to change geometry. More...

bool	updatesEnabled () const

QRegion	visibleRegion () const
	Returns the unobscured region where paint events can occur. More...

QString	whatsThis () const

int	width () const

QWidget *	window () const
	Returns the window for this widget, i.e. More...

QString	windowFilePath () const

Qt::WindowFlags	windowFlags () const
	Window flags are a combination of a type (e. More...

QIcon	windowIcon () const

QString	windowIconText () const

Qt::WindowModality	windowModality () const

qreal	windowOpacity () const

QString	windowRole () const
	Returns the window's role, or an empty string. More...

Qt::WindowStates	windowState () const
	Returns the current window state. More...

QWindowSurface *	windowSurface () const
	Returns the QWindowSurface this widget will be drawn into. More...

QString	windowTitle () const

Qt::WindowType	windowType () const
	Returns the window type of this widget. More...

WId	winId () const
	Returns the window system identifier of the widget. More...

int	x () const

const QX11Info &	x11Info () const
	Returns information about the configuration of the X display used to display the widget. More...

Qt::HANDLE	x11PictureHandle () const
	Returns the X11 Picture handle of the widget for XRender support. More...

int	y () const

	~QWidget ()
	Destroys the widget. More...

Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...

const QObjectList &	children () const
	Returns a list of child objects. More...

bool	connect (const QObject sender, const char signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const

bool	disconnect (const char signal=0, const QObject receiver=0, const char *member=0)

bool	disconnect (const QObject receiver, const char member=0)

void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...

void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...

QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...

template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...

template<typename T >
QList< T >	findChildren (const QString &aName=QString()) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...

template<typename T >
QList< T >	findChildren (const QRegExp &re) const

bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...

void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...

bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...

void	killTimer (int id)
	Kills the timer with timer identifier, id. More...

virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...

void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...

QString	objectName () const

QObject *	parent () const
	Returns a pointer to the parent object. More...

QVariant	property (const char *name) const
	Returns the value of the object's name property. More...

Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...

void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...

void	setObjectName (const QString &name)

void	setParent (QObject *)
	Makes the object a child of parent. More...

bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...

void	setUserData (uint id, QObjectUserData *data)

bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...

int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...

QThread *	thread () const
	Returns the thread in which the object lives. More...

QObjectUserData *	userData (uint id) const

virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...

Public Functions inherited from QPaintDevice
int	colorCount () const

int	depth () const

int	height () const

int	heightMM () const

int	logicalDpiX () const

int	logicalDpiY () const

QT_DEPRECATED int	numColors () const

bool	paintingActive () const

int	physicalDpiX () const

int	physicalDpiY () const

int	width () const

int	widthMM () const

virtual	~QPaintDevice ()

Static Public Functions
static void	about (QWidget *parent, const QString &title, const QString &text)
	Displays a simple about box with title title and text text. More...

static void	aboutQt (QWidget *parent, const QString &title=QString())
	Displays a simple message box about Qt, with the given title and centered over parent (if parent is not 0). More...

static StandardButton	critical (QWidget *parent, const QString &title, const QString &text, StandardButtons buttons=Ok, StandardButton defaultButton=NoButton)
	Opens a critical message box with the given title and text in front of the specified parent widget. More...

static int	critical (QWidget *parent, const QString &title, const QString &text, int button0, int button1, int button2=0)
	Opens a critical message box with the given title and text. More...

static int	critical (QWidget *parent, const QString &title, const QString &text, const QString &button0Text, const QString &button1Text=QString(), const QString &button2Text=QString(), int defaultButtonNumber=0, int escapeButtonNumber=-1)
	Displays a critical error message box with the given title and text, as well as one, two, or three buttons. More...

static int	critical (QWidget *parent, const QString &title, const QString &text, StandardButton button0, StandardButton button1)

static StandardButton	information (QWidget *parent, const QString &title, const QString &text, StandardButtons buttons=Ok, StandardButton defaultButton=NoButton)
	Opens an information message box with the given title and text in front of the specified parent widget. More...

static int	information (QWidget *parent, const QString &title, const QString &text, int button0, int button1=0, int button2=0)
	Opens an information message box with the given title and the text. More...

static int	information (QWidget *parent, const QString &title, const QString &text, const QString &button0Text, const QString &button1Text=QString(), const QString &button2Text=QString(), int defaultButtonNumber=0, int escapeButtonNumber=-1)
	Displays an information message box with the given title and text, as well as one, two or three buttons. More...

static StandardButton	information (QWidget *parent, const QString &title, const QString &text, StandardButton button0, StandardButton button1=NoButton)

static StandardButton	question (QWidget *parent, const QString &title, const QString &text, StandardButtons buttons=Ok, StandardButton defaultButton=NoButton)
	Opens a question message box with the given title and text in front of the specified parent widget. More...

static int	question (QWidget *parent, const QString &title, const QString &text, int button0, int button1=0, int button2=0)
	Opens a question message box with the given title and text. More...

static int	question (QWidget *parent, const QString &title, const QString &text, const QString &button0Text, const QString &button1Text=QString(), const QString &button2Text=QString(), int defaultButtonNumber=0, int escapeButtonNumber=-1)
	Displays a question message box with the given title and text, as well as one, two or three buttons. More...

static int	question (QWidget *parent, const QString &title, const QString &text, StandardButton button0, StandardButton button1)

static QPixmap	standardIcon (Icon icon)
	Returns the pixmap used for a standard icon. More...

static StandardButton	warning (QWidget *parent, const QString &title, const QString &text, StandardButtons buttons=Ok, StandardButton defaultButton=NoButton)
	Opens a warning message box with the given title and text in front of the specified parent widget. More...

static int	warning (QWidget *parent, const QString &title, const QString &text, int button0, int button1, int button2=0)
	Opens a warning message box with the given title and text. More...

static int	warning (QWidget *parent, const QString &title, const QString &text, const QString &button0Text, const QString &button1Text=QString(), const QString &button2Text=QString(), int defaultButtonNumber=0, int escapeButtonNumber=-1)
	Displays a warning message box with the given title and text, as well as one, two, or three buttons. More...

static int	warning (QWidget *parent, const QString &title, const QString &text, StandardButton button0, StandardButton button1)

Static Public Functions inherited from QWidget
static QWidget *	find (WId)
	Returns a pointer to the widget with window identifer/handle id. More...

static QWidget *	keyboardGrabber ()
	Returns the widget that is currently grabbing the keyboard input. More...

static QWidget *	mouseGrabber ()
	Returns the widget that is currently grabbing the mouse input. More...

static void	setTabOrder (QWidget , QWidget )
	Puts the second widget after the first widget in the focus order. More...

Static Public Functions inherited from QObject
static bool	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...

static bool	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)
	Disconnects signal in object sender from method in object receiver. More...

static bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &member)

static uint	registerUserData ()

static QString	tr (const char sourceText, const char comment=0, int n=-1)

static QString	trUtf8 (const char sourceText, const char comment=0, int n=-1)

Static Public Functions inherited from QPaintDevice
static QWSDisplay *	qwsDisplay ()

Protected Functions
void	changeEvent (QEvent *event)
	Reimplemented Function More...

void	closeEvent (QCloseEvent *event)
	Reimplemented Function More...

bool	event (QEvent *e)
	Reimplemented Function More...

void	keyPressEvent (QKeyEvent *event)
	Reimplemented Function More...

void	resizeEvent (QResizeEvent *event)
	Reimplemented Function More...

void	showEvent (QShowEvent *event)
	Reimplemented Function More...

Protected Functions inherited from QDialog
void	adjustPosition (QWidget *)

void	contextMenuEvent (QContextMenuEvent *)
	Reimplemented Function More...

bool	eventFilter (QObject , QEvent )
	Reimplemented Function More...

	QDialog (QDialogPrivate &, QWidget *parent, Qt::WindowFlags f=0)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

Protected Functions inherited from QWidget
virtual void	actionEvent (QActionEvent *)
	This event handler is called with the given event whenever the widget's actions are changed. More...

void	create (WId=0, bool initializeWindow=true, bool destroyOldWindow=true)
	Creates a new widget window if window is 0, otherwise sets the widget's window to window. More...

void	destroy (bool destroyWindow=true, bool destroySubWindows=true)
	Frees up window system resources. More...

virtual void	dragEnterEvent (QDragEnterEvent *)
	This event handler is called when a drag is in progress and the mouse enters this widget. More...

virtual void	dragLeaveEvent (QDragLeaveEvent *)
	This event handler is called when a drag is in progress and the mouse leaves this widget. More...

virtual void	dragMoveEvent (QDragMoveEvent *)
	This event handler is called if a drag is in progress, and when any of the following conditions occur: the cursor enters this widget, the cursor moves within this widget, or a modifier key is pressed on the keyboard while this widget has the focus. More...

virtual void	dropEvent (QDropEvent *)
	This event handler is called when the drag is dropped on this widget. More...

virtual void	enabledChange (bool)

virtual void	enterEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive widget enter events which are passed in the event parameter. More...

bool	event (QEvent *)
	This is the main event handler; it handles event event. More...

virtual void	focusInEvent (QFocusEvent *)
	This event handler can be reimplemented in a subclass to receive keyboard focus events (focus received) for the widget. More...

bool	focusNextChild ()
	Finds a new widget to give the keyboard focus to, as appropriate for Tab, and returns true if it can find a new widget, or false if it can't. More...

virtual bool	focusNextPrevChild (bool next)
	Finds a new widget to give the keyboard focus to, as appropriate for Tab and Shift+Tab, and returns true if it can find a new widget, or false if it can't. More...

virtual void	focusOutEvent (QFocusEvent *)
	This event handler can be reimplemented in a subclass to receive keyboard focus events (focus lost) for the widget. More...

bool	focusPreviousChild ()
	Finds a new widget to give the keyboard focus to, as appropriate for Shift+Tab, and returns true if it can find a new widget, or false if it can't. More...

virtual void	fontChange (const QFont &)

virtual void	hideEvent (QHideEvent *)
	This event handler can be reimplemented in a subclass to receive widget hide events. More...

virtual void	inputMethodEvent (QInputMethodEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive Input Method composition events. More...

virtual void	keyReleaseEvent (QKeyEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive key release events for the widget. More...

virtual void	languageChange ()

virtual void	leaveEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive widget leave events which are passed in the event parameter. More...

virtual bool	macEvent (EventHandlerCallRef, EventRef)
	This special event handler can be reimplemented in a subclass to receive native Macintosh events. More...

int	metric (PaintDeviceMetric) const
	Internal implementation of the virtual QPaintDevice::metric() function. More...

virtual void	mouseDoubleClickEvent (QMouseEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive mouse double click events for the widget. More...

virtual void	mouseMoveEvent (QMouseEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive mouse move events for the widget. More...

virtual void	mousePressEvent (QMouseEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive mouse press events for the widget. More...

virtual void	mouseReleaseEvent (QMouseEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive mouse release events for the widget. More...

virtual void	moveEvent (QMoveEvent *)
	This event handler can be reimplemented in a subclass to receive widget move events which are passed in the event parameter. More...

virtual void	paintEvent (QPaintEvent *)
	This event handler can be reimplemented in a subclass to receive paint events passed in event. More...

virtual void	paletteChange (const QPalette &)

	QWidget (QWidgetPrivate &d, QWidget *parent, Qt::WindowFlags f)

virtual bool	qwsEvent (QWSEvent *)
	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. More...

void	resetInputContext ()
	This function can be called on the widget that currently has focus to reset the input method operating on it. More...

virtual void	styleChange (QStyle &)

virtual void	tabletEvent (QTabletEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive tablet events for the widget. More...

virtual void	wheelEvent (QWheelEvent *)
	This event handler, for event event, can be reimplemented in a subclass to receive wheel events for the widget. More...

virtual void	windowActivationChange (bool)

virtual bool	winEvent (MSG message, long result)
	This special event handler can be reimplemented in a subclass to receive native Windows events which are passed in the message parameter. More...

virtual bool	x11Event (XEvent *)
	This special event handler can be reimplemented in a subclass to receive native X11 events passed in the event parameter. More...

Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...

virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...

virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...

virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...

	QObject (QObjectPrivate &dd, QObject *parent=0)

int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...

QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...

Protected Functions inherited from QPaintDevice
	QPaintDevice ()

Properties
QString	detailedText
	the text to be displayed in the details area. More...

Icon	icon
	the message box's icon More...

QPixmap	iconPixmap
	the current icon More...

QString	informativeText
	the informative text that provides a fuller description for the message More...

StandardButtons	standardButtons
	collection of standard buttons in the message box More...

QString	text
	the message box text to be displayed. More...

Qt::TextFormat	textFormat
	the format of the text displayed by the message box More...

Additional Inherited Members
Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...

Protected Slots inherited from QWidget
void	updateMicroFocus ()
	Updates the widget's micro focus. More...

Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Protected Variables inherited from QPaintDevice
ushort	painters

Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject

Related Functions inherited from QWidget
	QWidgetList

	WId
	Platform dependent window identifier. More...

Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()

QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()

T *	qobject_cast (QObject *object)

	QObjectList

void *	qt_find_obj_child (QObject parent, const char type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Related Functions inherited from QPaintDevice
const Q_GUI_EXPORT QX11Info *	qt_x11Info (const QPaintDevice *pd)
	Returns the QX11Info structure for the pd paint device. More...

Detailed Description

The QMessageBox class provides a modal dialog for informing the user or for asking the user a question and receiving an answer.

A message box displays a primary text to alert the user to a situation, an informative text to further explain the alert or to ask the user a question, and an optional detailed text to provide even more data if the user requests it. A message box can also display an icon and standard buttons for accepting a user response.

Two APIs for using QMessageBox are provided, the property-based API, and the static functions. Calling one of the static functions is the simpler approach, but it is less flexible than using the property-based API, and the result is less informative. Using the property-based API is recommended.

The Property-based API

To use the property-based API, construct an instance of QMessageBox, set the desired properties, and call exec() to show the message. The simplest configuration is to set only the message text property.

QMessageBox msgBox;
msgBox.setText("The document has been modified.");
msgBox.exec();

The user must click the OK button to dismiss the message box. The rest of the GUI is blocked until the message box is dismissed.

A better approach than just alerting the user to an event is to also ask the user what to do about it. Store the question in the informative text property, and set the standard buttons property to the set of buttons you want as the set of user responses. The buttons are specified by combining values from StandardButtons using the bitwise OR operator. The display order for the buttons is platform-dependent. For example, on Windows, Save is displayed to the left of Cancel, whereas on Mac OS, the order is reversed.

Mark one of your standard buttons to be your default button.

QMessageBox msgBox;
msgBox.setText("The document has been modified.");
msgBox.setInformativeText("Do you want to save your changes?");
msgBox.setStandardButtons(QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
msgBox.setDefaultButton(QMessageBox::Save);
int ret = msgBox.exec();

This is the approach recommended in the Mac OS X Guidelines. Similar guidelines apply for the other platforms, but note the different ways the informative text is handled for different platforms.

The exec() slot returns the StandardButtons value of the button that was clicked.

switch (ret) {
  case QMessageBox::Save:
      // Save was clicked
      break;
  case QMessageBox::Discard:
      // Don't Save was clicked
      break;
  case QMessageBox::Cancel:
      // Cancel was clicked
      break;
  default:
      // should never be reached
      break;
}

To give the user more information to help him answer the question, set the detailed text property. If the detailed text property is set, the Show Details... button will be shown.

Clicking the Show Details... button displays the detailed text.

Rich Text and the Text Format Property

The detailed text property is always interpreted as plain text. The main text and informative text properties can be either plain text or rich text. These strings are interpreted according to the setting of the text format property. The default setting is auto-text.

Note that for some plain text strings containing XML meta-characters, the auto-text rich text detection test may fail causing your plain text string to be interpreted incorrectly as rich text. In these rare cases, use Qt::convertFromPlainText() to convert your plain text string to a visually equivalent rich text string, or set the text format property explicitly with setTextFormat().

Severity Levels and the Icon and Pixmap Properties

QMessageBox supports four predefined message severity levels, or message types, which really only differ in the predefined icon they each show. Specify one of the four predefined message types by setting the icon property to one of the predefined icons. The following rules are guidelines:

	Question	For asking a question during normal operations.
	Information	For reporting information about normal operations.
	Warning	For reporting non-critical errors.
	Critical	For reporting critical errors.

Predefined icons are not defined by QMessageBox, but provided by the style. The default value is No Icon. The message boxes are otherwise the same for all cases. When using a standard icon, use the one recommended in the table, or use the one recommended by the style guidelines for your platform. If none of the standard icons is right for your message box, you can use a custom icon by setting the icon pixmap property instead of setting the icon property.

In summary, to set an icon, use either setIcon() for one of the standard icons, or setIconPixmap() for a custom icon.

The Static Functions API

Building message boxes with the static functions API, although convenient, is less flexible than using the property-based API, because the static function signatures lack parameters for setting the informative text and detailed text properties. One work-around for this has been to use the title parameter as the message box main text and the text parameter as the message box informative text. Because this has the obvious drawback of making a less readable message box, platform guidelines do not recommend it. The Microsoft Windows User Interface Guidelines recommend using the application name as the window's title, which means that if you have an informative text in addition to your main text, you must concatenate it to the text parameter.

Note that the static function signatures have changed with respect to their button parameters, which are now used to set the standard buttons and the default button.

Static functions are available for creating information(), question(), warning(), and critical() message boxes.

int ret = QMessageBox::warning(this, tr("My Application"),
                               tr("The document has been modified.\n"
                                  "Do you want to save your changes?"),
                               QMessageBox::Save | QMessageBox::Discard
                               | QMessageBox::Cancel,
                               QMessageBox::Save);

The Standard Dialogs example shows how to use QMessageBox and the other built-in Qt dialogs.

Advanced Usage

If the standard buttons are not flexible enough for your message box, you can use the addButton() overload that takes a text and a ButtonRoleto to add custom buttons. The ButtonRole is used by QMessageBox to determine the ordering of the buttons on screen (which varies according to the platform). You can test the value of clickedButton() after calling exec(). For example,

QMessageBox msgBox;
QPushButton *connectButton = msgBox.addButton(tr("Connect"), QMessageBox::ActionRole);
QPushButton *abortButton = msgBox.addButton(QMessageBox::Abort);
msgBox.exec();
if (msgBox.clickedButton() == connectButton) {
    // connect
} else if (msgBox.clickedButton() == abortButton) {
    // abort
}

Default and Escape Keys

The default button (i.e., the button activated when Enter is pressed) can be specified using setDefaultButton(). If a default button is not specified, QMessageBox tries to find one based on the button roles of the buttons used in the message box.

The escape button (the button activated when Esc is pressed) can be specified using setEscapeButton(). If an escape button is not specified, QMessageBox tries to find one using these rules:

If there is only one button, it is the button activated when Esc is pressed.
If there is a Cancel button, it is the button activated when Esc is pressed.
If there is exactly one button having either the Reject role or the the No role, it is the button activated when Esc is pressed.

When an escape button can't be determined using these rules, pressing Esc has no effect.

See also: QDialogButtonBox, {fowler}{GUI Design Handbook: Message Box}, {Standard Dialogs Example}, {Application Example}

Definition at line 59 of file qmessagebox.h.

Typedefs

◆ Button

QMessageBox::Button

Use QMessageBox::StandardButton instead.

Definition at line 133 of file qmessagebox.h.

Enumerations

◆ ButtonRole

enum QMessageBox::ButtonRole

Combinations of these roles are as flags used to describe different aspects of their behavior.

InvalidRole The button is invalid.
AcceptRole Clicking the button causes the dialog to be accepted (e.g. OK).
RejectRole Clicking the button causes the dialog to be rejected (e.g. Cancel).
DestructiveRole Clicking the button causes a destructive change (e.g. for Discarding Changes) and closes the dialog.
ActionRole Clicking the button causes changes to the elements within the dialog.
HelpRole The button can be clicked to request help.
YesRole The button is a "Yes"-like button.
NoRole The button is a "No"-like button.
ApplyRole The button applies current changes.
ResetRole The button resets the dialog's fields to default values.

NRoles

See also: StandardButton

Enumerator
InvalidRole
AcceptRole
RejectRole
DestructiveRole
ActionRole
HelpRole
YesRole
NoRole
ResetRole
ApplyRole
NRoles

Definition at line 84 of file qmessagebox.h.

                     {
         // keep this in sync with QDialogButtonBox::ButtonRole
         InvalidRole = -1,
         AcceptRole,
         RejectRole,
         DestructiveRole,
         ActionRole,
         HelpRole,
         YesRole,
         NoRole,
         ResetRole,
         ApplyRole,
 
         NRoles
     };

◆ Icon

enum QMessageBox::Icon

This enum has the following values:

NoIcon the message box does not have any icon.

Question an icon indicating that the message is asking a question.

Information an icon indicating that the message is nothing out of the ordinary.

Warning an icon indicating that the message is a warning, but can be dealt with.

Critical an icon indicating that the message represents a critical problem.

Enumerator
NoIcon
Information
Warning
Critical
Question

Definition at line 76 of file qmessagebox.h.

               {
         NoIcon = 0,
         Information = 1,
         Warning = 2,
         Critical = 3,
         Question = 4
     };

◆ StandardButton

enum QMessageBox::StandardButton

These enums describe flags for standard buttons.

Since: 4.2

Each button has a defined ButtonRole .

Ok An "OK" button defined with the AcceptRole .
Open A "Open" button defined with the AcceptRole .
Save A "Save" button defined with the AcceptRole .
Cancel A "Cancel" button defined with the RejectRole .
Close A "Close" button defined with the RejectRole .
Discard A "Discard" or "Don't Save" button, depending on the platform, defined with the DestructiveRole .
Apply An "Apply" button defined with the ApplyRole .
Reset A "Reset" button defined with the ResetRole .
RestoreDefaults A "Restore Defaults" button defined with the ResetRole .
Help A "Help" button defined with the HelpRole .
SaveAll A "Save All" button defined with the AcceptRole .
Yes A "Yes" button defined with the YesRole .
YesToAll A "Yes to All" button defined with the YesRole .
No A "No" button defined with the NoRole .
NoToAll A "No to All" button defined with the NoRole .
Abort An "Abort" button defined with the RejectRole .
Retry A "Retry" button defined with the AcceptRole .
Ignore An "Ignore" button defined with the AcceptRole .

NoButton An invalid button.

FirstButton
LastButton

The following values are obsolete:

YesAll Use YesToAll instead.
NoAll Use NoToAll instead.
Default Use the defaultButton argument of information(), warning(), etc. instead, or call setDefaultButton().
Escape Call setEscapeButton() instead.
FlagMask
ButtonMask

See also: ButtonRole, standardButtons

Enumerator
NoButton
Ok
Save
SaveAll
Open
Yes
YesToAll
No
NoToAll
Abort
Retry
Ignore
Close
Cancel
Discard
Help
Apply
Reset
RestoreDefaults
FirstButton
LastButton
YesAll
NoAll
Default
Escape
FlagMask
ButtonMask

Definition at line 100 of file qmessagebox.h.

                         {
         // keep this in sync with QDialogButtonBox::StandardButton
         NoButton           = 0x00000000,
         Ok                 = 0x00000400,
         Save               = 0x00000800,
         SaveAll            = 0x00001000,
         Open               = 0x00002000,
         Yes                = 0x00004000,
         YesToAll           = 0x00008000,
         No                 = 0x00010000,
         NoToAll            = 0x00020000,
         Abort              = 0x00040000,
         Retry              = 0x00080000,
         Ignore             = 0x00100000,
         Close              = 0x00200000,
         Cancel             = 0x00400000,
         Discard            = 0x00800000,
         Help               = 0x01000000,
         Apply              = 0x02000000,
         Reset              = 0x04000000,
         RestoreDefaults    = 0x08000000,
 
         FirstButton        = Ok,                // internal
         LastButton         = RestoreDefaults,   // internal
 
         YesAll             = YesToAll,          // obsolete
         NoAll              = NoToAll,           // obsolete
 
         Default            = 0x00000100,        // obsolete
         Escape             = 0x00000200,        // obsolete
         FlagMask           = 0x00000300,        // obsolete
         ButtonMask         = ~FlagMask          // obsolete
     };

Constructors and Destructors

◆ QMessageBox() [1/3]

QMessageBox::QMessageBox ( QWidget * parent = 0 )

explicit

Constructs a message box with no text and no buttons.

parent is passed to the QDialog constructor.

On Mac OS X, if you want your message box to appear as a Qt::Sheet of its parent, set the message box's window modality to Qt::WindowModal or use open(). Otherwise, the message box will be a standard dialog.

Definition at line 776 of file qmessagebox.cpp.

Referenced by about(), aboutQt(), and setWindowModality().

     : QDialog(*new QMessageBoxPrivate, parent, Qt::MSWindowsFixedSizeDialogHint | Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint)
 {
     Q_D(QMessageBox);
     d->init();
 }

◆ QMessageBox() [2/3]

QMessageBox::QMessageBox	(	Icon	icon,
		const QString &	title,
		const QString &	text,
		StandardButtons	buttons = `NoButton`,
		QWidget *	parent = `0`,
		Qt::WindowFlags	f = `Qt::Dialog \| Qt::MSWindowsFixedSizeDialogHint`
	)

Constructs a message box with the given icon, title, text, and standard buttons.

Standard or custom buttons can be added at any time using addButton(). The parent and f arguments are passed to the QDialog constructor.

The message box is an application modal dialog box.

On Mac OS X, if parent is not 0 and you want your message box to appear as a Qt::Sheet of that parent, set the message box's window modality to Qt::WindowModal (default). Otherwise, the message box will be a standard dialog.

See also: setWindowTitle(), setText(), setIcon(), setStandardButtons()

Definition at line 799 of file qmessagebox.cpp.

 : QDialog(*new QMessageBoxPrivate, parent, f | Qt::MSWindowsFixedSizeDialogHint | Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint)
 {
     Q_D(QMessageBox);
     d->init(title, text);
     setIcon(icon);
     if (buttons != NoButton)
         setStandardButtons(buttons);
 }

◆ ~QMessageBox()

QMessageBox::~QMessageBox ( )

Destroys the message box.

Definition at line 814 of file qmessagebox.cpp.

815 {

816 }

◆ QMessageBox() [3/3]

QMessageBox::QMessageBox	(	const QString &	title,
		const QString &	text,
		Icon	icon,
		int	button0,
		int	button1,
		int	button2,
		QWidget *	parent = `0`,
		Qt::WindowFlags	f = `Qt::Dialog \| Qt::MSWindowsFixedSizeDialogHint`
	)

Constructs a message box with a title, a text, an icon, and up to three buttons.

The icon must be one of the following:

Each button, button0, button1 and button2, can have one of the following values:

Use QMessageBox::NoButton for the later parameters to have fewer than three buttons in your message box. If you don't specify any buttons at all, QMessageBox will provide an Ok button.

One of the buttons can be OR-ed with the QMessageBox::Default flag to make it the default button (clicked when Enter is pressed).

One of the buttons can be OR-ed with the QMessageBox::Escape flag to make it the cancel or close button (clicked when Esc is pressed).

        QMessageBox mb("Application Name",
                       "Hardware failure.\n\nDisk error detected\nDo you want to stop?",
                       QMessageBox::Question,
                       QMessageBox::Yes | QMessageBox::Default,
                       QMessageBox::No | QMessageBox::Escape,
                       QMessageBox::NoButton);
        if (mb.exec() == QMessageBox::No) {
            // try again

The message box is an application modal dialog box.

The parent and f arguments are passed to the QDialog constructor.

See also: setWindowTitle(), setText(), setIcon()

Definition at line 2093 of file qmessagebox.cpp.

     : QDialog(*new QMessageBoxPrivate, parent,
               f /*| Qt::MSWindowsFixedSizeDialogHint #### */| Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint)
 {
     Q_D(QMessageBox);
     d->init(title, text);
     setIcon(icon);
     d->addOldButtons(button0, button1, button2);
 }

Functions

◆ about()

void QMessageBox::about	(	QWidget *	parent,
		const QString &	title,
		const QString &	text
	)

static

Displays a simple about box with title title and text text.

The about box's parent is parent.

about() looks for a suitable icon in four locations:

It prefers parent->icon() if that exists.
If not, it tries the top-level widget containing parent.
If that fails, it tries the active window.
As a last resort it uses the Information icon.

The about box has a single button labelled "OK". On Mac OS X, the about box is popped up as a modeless window; on other platforms, it is currently application modal.

See also: QWidget::windowIcon(), QApplication::activeWindow()

Definition at line 1773 of file qmessagebox.cpp.

 {
 #ifdef Q_WS_MAC
     static QPointer<QMessageBox> oldMsgBox;
 
     if (oldMsgBox && oldMsgBox->text() == text) {
         oldMsgBox->show();
         oldMsgBox->raise();
         oldMsgBox->activateWindow();
         return;
     }
 #endif
 
     QMessageBox *msgBox = new QMessageBox(title, text, Information, 0, 0, 0, parent
 #ifdef Q_WS_MAC
                                           , Qt::WindowTitleHint | Qt::WindowSystemMenuHint
 #endif
     );
     msgBox->setAttribute(Qt::WA_DeleteOnClose);
     QIcon icon = msgBox->windowIcon();
     QSize size = icon.actualSize(QSize(64, 64));
     msgBox->setIconPixmap(icon.pixmap(size));
 
     // should perhaps be a style hint
 #ifdef Q_WS_MAC
     oldMsgBox = msgBox;
 #if 0
     // ### doesn't work until close button is enabled in title bar
     msgBox->d_func()->autoAddOkButton = false;
 #else
     msgBox->d_func()->buttonBox->setCenterButtons(true);
 #endif
     msgBox->show();
 #else
     msgBox->exec();
 #endif
 }

◆ aboutQt()

void QMessageBox::aboutQt	(	QWidget *	parent,
		const QString &	title = `QString()`
	)

static

Displays a simple message box about Qt, with the given title and centered over parent (if parent is not 0).

The message includes the version number of Qt being used by the application.

This is useful for inclusion in the Help menu of an application, as shown in the Menus example.

QApplication provides this functionality as a slot.

On Mac OS X, the about box is popped up as a modeless window; on other platforms, it is currently application modal.

See also: QApplication::aboutQt()

Definition at line 1826 of file qmessagebox.cpp.

Referenced by QApplication::aboutQt(), and QApplicationPrivate::globalEventProcessor().

 {
 #ifdef Q_WS_MAC
     static QPointer<QMessageBox> oldMsgBox;
 
     if (oldMsgBox) {
         oldMsgBox->show();
         oldMsgBox->raise();
         oldMsgBox->activateWindow();
         return;
     }
 #endif
 
     QString translatedTextAboutQtCaption;
     translatedTextAboutQtCaption = QMessageBox::tr(
         "<h3>About Qt</h3>"
         "<p>This program uses Qt version %1.</p>"
         ).arg(QLatin1String(QT_VERSION_STR));
     QString translatedTextAboutQtText;
     translatedTextAboutQtText = QMessageBox::tr(
         "<p>Qt is a C++ toolkit for cross-platform application "
         "development.</p>"
         "<p>Qt provides single-source portability across MS&nbsp;Windows, "
         "Mac&nbsp;OS&nbsp;X, Linux, and all major commercial Unix variants. "
         "Qt is also available for embedded devices as Qt for Embedded Linux "
         "and Qt for Windows CE.</p>"
         "<p>Qt is available under three different licensing options designed "
         "to accommodate the needs of our various users.</p>"
         "<p>Qt licensed under our commercial license agreement is appropriate "
         "for development of proprietary/commercial software where you do not "
         "want to share any source code with third parties or otherwise cannot "
         "comply with the terms of the GNU LGPL version 2.1 or GNU GPL version "
         "3.0.</p>"
         "<p>Qt licensed under the GNU LGPL version 2.1 is appropriate for the "
         "development of Qt applications (proprietary or open source) provided "
         "you can comply with the terms and conditions of the GNU LGPL version "
         "2.1.</p>"
         "<p>Qt licensed under the GNU General Public License version 3.0 is "
         "appropriate for the development of Qt applications where you wish to "
         "use such applications in combination with software subject to the "
         "terms of the GNU GPL version 3.0 or where you are otherwise willing "
         "to comply with the terms of the GNU GPL version 3.0.</p>"
         "<p>Please see <a href=\"http://qt.digia.com/product/licensing\">qt.digia.com/product/licensing</a> "
         "for an overview of Qt licensing.</p>"
         "<p>Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).</p>"
         "<p>Qt is a Digia product. See <a href=\"http://qt.digia.com/\">qt.digia.com</a> "
         "for more information.</p>"
         );
     QMessageBox *msgBox = new QMessageBox(parent);
     msgBox->setAttribute(Qt::WA_DeleteOnClose);
     msgBox->setWindowTitle(title.isEmpty() ? tr("About Qt") : title);
     msgBox->setText(translatedTextAboutQtCaption);
     msgBox->setInformativeText(translatedTextAboutQtText);
 
     QPixmap pm(QLatin1String(":/trolltech/qmessagebox/images/qtlogo-64.png"));
     if (!pm.isNull())
         msgBox->setIconPixmap(pm);
 #if defined(Q_WS_WINCE)
     msgBox->setDefaultButton(msgBox->addButton(QMessageBox::Ok));
 #endif
 
     // should perhaps be a style hint
 #ifdef Q_WS_MAC
     oldMsgBox = msgBox;
 #if 0
     // ### doesn't work until close button is enabled in title bar
     msgBox->d_func()->autoAddOkButton = false;
 #else
     msgBox->d_func()->buttonBox->setCenterButtons(true);
 #endif
     msgBox->show();
 #else
     msgBox->exec();
 #endif
 }

◆ addButton() [1/3]

void QMessageBox::addButton	(	QAbstractButton *	button,
		ButtonRole	role
	)

Adds the given button to the message box with the specified role.

Since: 4.2

See also: removeButton(), button(), setStandardButtons()

Definition at line 829 of file qmessagebox.cpp.

Referenced by aboutQt(), addButton(), setButtonText(), showEvent(), showNewMessageBox(), and QMessageBoxPrivate::showOldMessageBox().

 {
     Q_D(QMessageBox);
     if (!button)
         return;
     removeButton(button);
     d->buttonBox->addButton(button, (QDialogButtonBox::ButtonRole)role);
     d->customButtonList.append(button);
     d->autoAddOkButton = false;
 }

◆ addButton() [2/3]

QPushButton * QMessageBox::addButton	(	const QString &	text,
		ButtonRole	role
	)

Creates a button with the given text, adds it to the message box for the specified role, and returns it.

Since: 4.2 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 850 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     QPushButton *pushButton = new QPushButton(text);
     addButton(pushButton, role);
     d->updateSize();
     return pushButton;
 }

◆ addButton() [3/3]

QPushButton * QMessageBox::addButton ( StandardButton button )

Adds a standard button to the message box if it is valid to do so, and returns the push button.

Since: 4.2 This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

See also: setStandardButtons()

Definition at line 871 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     QPushButton *pushButton = d->buttonBox->addButton((QDialogButtonBox::StandardButton)button);
     if (pushButton)
         d->autoAddOkButton = false;
     return pushButton;
 }

◆ button()

QAbstractButton * QMessageBox::button ( StandardButton which ) const

Returns a pointer corresponding to the standard button which, or 0 if the standard button doesn't exist in this message box.

Since: 4.2

See also: standardButtons, standardButton()

Definition at line 964 of file qmessagebox.cpp.

Referenced by QMessageBoxPrivate::findButton(), setDefaultButton(), and showNewMessageBox().

 {
     Q_D(const QMessageBox);
     return d->buttonBox->button(QDialogButtonBox::StandardButton(which));
 }

◆ buttonClicked

void QMessageBox::buttonClicked ( QAbstractButton * button )

signal

This signal is emitted whenever a button is clicked inside the QMessageBox.

The button that was clicked in returned in button.

Referenced by open().

◆ buttonRole()

QMessageBox::ButtonRole QMessageBox::buttonRole ( QAbstractButton * button ) const

Returns the button role for the specified button.

Since: 4.5

This function returns InvalidRole if button is 0 or has not been added to the message box.

See also: buttons(), addButton()

Definition at line 1534 of file qmessagebox.cpp.

 {
     Q_D(const QMessageBox);
     return QMessageBox::ButtonRole(d->buttonBox->buttonRole(button));
 }

◆ buttons()

QList< QAbstractButton * > QMessageBox::buttons ( ) const

Returns a list of all the buttons that have been added to the message box.

Since: 4.5

See also: buttonRole(), addButton(), removeButton()

Definition at line 1517 of file qmessagebox.cpp.

Referenced by QMessageBoxPrivate::detectEscapeButton(), and keyPressEvent().

 {
     Q_D(const QMessageBox);
     return d->buttonBox->buttons();
 }

◆ buttonText()

QString QMessageBox::buttonText ( int button ) const

Returns the text of the message box button button, or an empty string if the message box does not contain the button.

Use button() and QPushButton::text() instead.

Definition at line 2484 of file qmessagebox.cpp.

 {
     Q_D(const QMessageBox);
 
     if (QAbstractButton *abstractButton = d->abstractButtonForId(button)) {
         return abstractButton->text();
     } else if (d->buttonBox->buttons().isEmpty() && (button == Ok || button == Old_Ok)) {
         // for compatibility with Qt 4.0/4.1
         return QDialogButtonBox::tr("OK");
     }
     return QString();
 }

◆ changeEvent()

void QMessageBox::changeEvent ( QEvent * event )

protectedvirtual

Reimplemented Function

Reimplemented from QWidget.

Definition at line 1375 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     switch (ev->type()) {
     case QEvent::StyleChange:
     {
         if (d->icon != NoIcon)
             setIcon(d->icon);
         Qt::TextInteractionFlags flags(style()->styleHint(QStyle::SH_MessageBox_TextInteractionFlags, 0, this));
         d->label->setTextInteractionFlags(flags);
         d->buttonBox->setCenterButtons(style()->styleHint(QStyle::SH_MessageBox_CenterButtons, 0, this));
         if (d->informativeLabel)
             d->informativeLabel->setTextInteractionFlags(flags);
         // intentional fall through
     }
     case QEvent::FontChange:
     case QEvent::ApplicationFontChange:
 #ifdef Q_WS_MAC
     {
         QFont f = font();
         f.setBold(true);
         d->label->setFont(f);
     }
 #endif
     default:
         break;
     }
     QDialog::changeEvent(ev);
 }

◆ clickedButton()

QAbstractButton * QMessageBox::clickedButton ( ) const

Returns the button that was clicked by the user, or 0 if the user hit the Esc key and no escape button was set.

Since: 4.2

If exec() hasn't been called yet, returns 0.

Example:

QMessageBox messageBox(this);
QAbstractButton *disconnectButton =
      messageBox.addButton(tr("Disconnect"), QMessageBox::ActionRole);
...
messageBox.exec();
if (messageBox.clickedButton() == disconnectButton) {
    ...
}

See also: standardButton(), button()

Definition at line 1096 of file qmessagebox.cpp.

Referenced by showNewMessageBox().

 {
     Q_D(const QMessageBox);
     return d->clickedButton;
 }

◆ closeEvent()

void QMessageBox::closeEvent ( QCloseEvent * event )

protectedvirtual

Reimplemented Function

Reimplemented from QDialog.

Definition at line 1360 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     if (!d->detectedEscapeButton) {
         e->ignore();
         return;
     }
     QDialog::closeEvent(e);
     d->clickedButton = d->detectedEscapeButton;
     setResult(d->execReturnCode(d->detectedEscapeButton));
 }

◆ critical() [1/4]

QMessageBox::StandardButton QMessageBox::critical	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		StandardButtons	buttons = `Ok`,
		StandardButton	defaultButton = `NoButton`
	)

static

Opens a critical message box with the given title and text in front of the specified parent widget.

Since: 4.2

The standard buttons are added to the message box. defaultButton specifies the button used when Enter is pressed. defaultButton must refer to a button that was given in buttons. If defaultButton is QMessageBox::NoButton, QMessageBox chooses a suitable default automatically.

Returns the identity of the standard button that was clicked. If Esc was pressed instead, the Default and Escape Keys {escape button} is returned.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: question(), warning(), information()

Definition at line 1745 of file qmessagebox.cpp.

 {
     return showNewMessageBox(parent, Critical, title, text, buttons, defaultButton);
 }

◆ critical() [2/4]

int QMessageBox::critical	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		int	button0,
		int	button1,
		int	button2 = `0`
	)

static

Opens a critical message box with the given title and text.

The dialog may have up to three buttons. Each of the button parameters, button0, button1 and button2 may be set to one of the following values:

If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton.

One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape.

Returns the identity (QMessageBox::Ok, or QMessageBox::No, etc.) of the button that was clicked.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: information(), question(), warning()

Definition at line 2423 of file qmessagebox.cpp.

 {
     return QMessageBoxPrivate::showOldMessageBox(parent, Critical, title, text,
                                                  button0, button1, button2);
 }

◆ critical() [3/4]

int QMessageBox::critical	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		const QString &	button0Text,
		const QString &	button1Text = `QString()`,
		const QString &	button2Text = `QString()`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)

static

Displays a critical error message box with the given title and text, as well as one, two, or three buttons.

button0Text is the text of the first button, and is optional. If button0Text is not supplied, "OK" (translated) will be used. button1Text is the text of the second button, and is optional, and button2Text is the text of the third button, and is optional. defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1, or 2 to make pressing Escape equivalent to clicking the relevant button.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: information(), question(), warning()

Definition at line 2462 of file qmessagebox.cpp.

 {
     return QMessageBoxPrivate::showOldMessageBox(parent, Critical, title, text,
                                                    button0Text, button1Text, button2Text,
                                                    defaultButtonNumber, escapeButtonNumber);
 }

◆ critical() [4/4]

int QMessageBox::critical	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		StandardButton	button0,
		StandardButton	button1
	)

inlinestatic

Definition at line 272 of file qmessagebox.h.

275 { return critical(parent, title, text, StandardButtons(button0), button1); }

QMessageBox::critical

static StandardButton critical(QWidget *parent, const QString &title, const QString &text, StandardButtons buttons=Ok, StandardButton defaultButton=NoButton)

Opens a critical message box with the given title and text in front of the specified parent widget...

Definition: qmessagebox.cpp:1745

◆ defaultButton()

QPushButton * QMessageBox::defaultButton ( ) const

Returns the button that should be the message box's default button.

Since: 4.2

Returns 0 if no default button was set.

See also: addButton(), QPushButton::setDefault()

Definition at line 1114 of file qmessagebox.cpp.

Referenced by setWindowModality(), and showNewMessageBox().

 {
     Q_D(const QMessageBox);
     return d->defaultButton;
 }

◆ detailedText()

QString QMessageBox::detailedText ( ) const

Referenced by setButtonText().

◆ escapeButton()

QAbstractButton * QMessageBox::escapeButton ( ) const

Returns the button that is activated when escape is pressed.

Since: 4.2

By default, QMessageBox attempts to automatically detect an escape button as follows:

If there is only one button, it is made the escape button.
If there is a Cancel button, it is made the escape button.
On Mac OS X only, if there is exactly one button with the role QMessageBox::RejectRole, it is made the escape button.

When an escape button could not be automatically detected, pressing Esc has no effect.

See also: addButton()

Definition at line 993 of file qmessagebox.cpp.

Referenced by QMessageBoxPrivate::detectEscapeButton().

 {
     Q_D(const QMessageBox);
     return d->escapeButton;
 }

◆ event()

bool QMessageBox::event ( QEvent * e )

protectedvirtual

Reimplemented Function

Reimplemented from QDialog.

Definition at line 1315 of file qmessagebox.cpp.

 {
     bool result =QDialog::event(e);
     switch (e->type()) {
         case QEvent::LayoutRequest:
             d_func()->updateSize();
             break;
         case QEvent::LanguageChange:
             d_func()->retranslateStrings();
             break;
 #ifdef Q_WS_WINCE
         case QEvent::OkRequest:
         case QEvent::HelpRequest: {
           QString bName =
               (e->type() == QEvent::OkRequest)
               ? QApplication::translate("QMessageBox", "OK")
               : QApplication::translate("QMessageBox", "Help");
           QList<QPushButton*> list = findChildren<QPushButton*>();
           for (int i=0; i<list.size(); ++i) {
               QPushButton *pb = list.at(i);
               if (pb->text() == bName) {
                   if (pb->isEnabled())
                       pb->click();
                   return pb->isEnabled();
               }
           }
         }
 #endif
         default:
             break;
     }
     return result;
 }

◆ exec

int QMessageBox::exec ( )

slot

Shows the message box as a modal dialog, blocking until the user closes it.

When using a QMessageBox with standard buttons, this functions returns a StandardButton value indicating the standard button that was clicked. When using QMessageBox with custom buttons, this function returns an opaque value; use clickedButton() to determine which button was clicked.

Note: The result() function returns also StandardButton value instead of QDialog::DialogCode

Users cannot interact with any other window in the same application until they close the dialog, either by clicking a button or by using a mechanism provided by the window system.

See also: show(), result()

Referenced by about(), aboutQt(), showNewMessageBox(), and QMessageBoxPrivate::showOldMessageBox().

◆ icon()

Icon QMessageBox::icon ( ) const

Referenced by about(), setIcon(), setText(), and setWindowModality().

◆ iconPixmap()

QPixmap QMessageBox::iconPixmap ( ) const

Referenced by setIcon().

◆ information() [1/4]

QMessageBox::StandardButton QMessageBox::information	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		StandardButtons	buttons = `Ok`,
		StandardButton	defaultButton = `NoButton`
	)

static

Opens an information message box with the given title and text in front of the specified parent widget.

Since: 4.2

The standard buttons are added to the message box. defaultButton specifies the button used when Enter is pressed. defaultButton must refer to a button that was given in buttons. If defaultButton is QMessageBox::NoButton, QMessageBox chooses a suitable default automatically.

Returns the identity of the standard button that was clicked. If Esc was pressed instead, the Default and Escape Keys {escape button} is returned.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: question(), warning(), critical()

Definition at line 1638 of file qmessagebox.cpp.

Referenced by critical(), QFileSystemModel::setData(), and QCoreFuriCuri::timerEvent().

 {
     return showNewMessageBox(parent, Information, title, text, buttons,
                              defaultButton);
 }

◆ information() [2/4]

int QMessageBox::information	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		int	button0,
		int	button1 = `0`,
		int	button2 = `0`
	)

static

Opens an information message box with the given title and the text.

The dialog may have up to three buttons. Each of the buttons, button0, button1 and button2 may be set to one of the following values:

If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton.

One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape.

Returns the identity (QMessageBox::Ok, or QMessageBox::No, etc.) of the button that was clicked.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: question(), warning(), critical()

Definition at line 2147 of file qmessagebox.cpp.

 {
     return QMessageBoxPrivate::showOldMessageBox(parent, Information, title, text,
                                                    button0, button1, button2);
 }

◆ information() [3/4]

int QMessageBox::information	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		const QString &	button0Text,
		const QString &	button1Text = `QString()`,
		const QString &	button2Text = `QString()`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)

static

Displays an information message box with the given title and text, as well as one, two or three buttons.

button0Text is the text of the first button, and is optional. If button0Text is not supplied, "OK" (translated) will be used. button1Text is the text of the second button, and is optional. button2Text is the text of the third button, and is optional. defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). escapeButtonNumber is the index of the escape button; pressing Esc is the same as clicking this button. It defaults to -1; supply 0, 1 or 2 to make pressing Esc equivalent to clicking the relevant button.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: question(), warning(), critical()

Definition at line 2187 of file qmessagebox.cpp.

 {
     return QMessageBoxPrivate::showOldMessageBox(parent, Information, title, text,
                                                    button0Text, button1Text, button2Text,
                                                    defaultButtonNumber, escapeButtonNumber);
 }

◆ information() [4/4]

int QMessageBox::information	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		StandardButton	button0,
		StandardButton	button1 = `NoButton`
	)

inlinestatic

Definition at line 227 of file qmessagebox.h.

230 { return information(parent, title, text, StandardButtons(button0), button1); }

QMessageBox::information

static StandardButton information(QWidget *parent, const QString &title, const QString &text, StandardButtons buttons=Ok, StandardButton defaultButton=NoButton)

Opens an information message box with the given title and text in front of the specified parent widge...

Definition: qmessagebox.cpp:1638

◆ informativeText()

QString QMessageBox::informativeText ( ) const

Referenced by setDetailedText().

◆ keyPressEvent()

void QMessageBox::keyPressEvent ( QKeyEvent * event )

protectedvirtual

Reimplemented Function

Reimplemented from QDialog.

Definition at line 1408 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     if (e->key() == Qt::Key_Escape
 #ifdef Q_WS_MAC
         || (e->modifiers() == Qt::ControlModifier && e->key() == Qt::Key_Period)
 #endif
         ) {
             if (d->detectedEscapeButton) {
 #ifdef Q_WS_MAC
                 d->detectedEscapeButton->animateClick();
 #else
                 d->detectedEscapeButton->click();
 #endif
             }
             return;
         }
 
 #if defined (Q_OS_WIN) && !defined(QT_NO_CLIPBOARD) && !defined(QT_NO_SHORTCUT)
         if (e == QKeySequence::Copy) {
             QString separator = QString::fromLatin1("---------------------------\n");
             QString textToCopy = separator;
             separator.prepend(QLatin1Char('\n'));
             textToCopy += windowTitle() + separator; // title
             textToCopy += d->label->text() + separator; // text
 
             if (d->informativeLabel)
                 textToCopy += d->informativeLabel->text() + separator;
 
             QString buttonTexts;
             QList<QAbstractButton *> buttons = d->buttonBox->buttons();
             for (int i = 0; i < buttons.count(); i++) {
                 buttonTexts += buttons[i]->text() + QLatin1String("   ");
             }
             textToCopy += buttonTexts + separator;
 
             QApplication::clipboard()->setText(textToCopy);
             return;
         }
 #endif //QT_NO_SHORTCUT QT_NO_CLIPBOARD Q_OS_WIN
 
 #ifndef QT_NO_SHORTCUT
     if (!(e->modifiers() & Qt::AltModifier)) {
         int key = e->key() & ~((int)Qt::MODIFIER_MASK|(int)Qt::UNICODE_ACCEL);
         if (key) {
             const QList<QAbstractButton *> buttons = d->buttonBox->buttons();
             for (int i = 0; i < buttons.count(); ++i) {
                 QAbstractButton *pb = buttons.at(i);
                 int acc = pb->shortcut() & ~((int)Qt::MODIFIER_MASK|(int)Qt::UNICODE_ACCEL);
                 if (acc == key) {
                     pb->animateClick();
                     return;
                 }
             }
         }
     }
 #endif
     QDialog::keyPressEvent(e);
 }

◆ open()

void QMessageBox::open	(	QObject *	receiver,
		const char *	member
	)

Opens the dialog and connects its finished() or buttonClicked() signal to the slot specified by receiver and member.

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

If the slot in member has a pointer for its first parameter the connection is to buttonClicked(), otherwise the connection is to finished().

The signal will be disconnected from the slot when the dialog is closed.

Definition at line 1495 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     const char *signal = member && strchr(member, '*') ? SIGNAL(buttonClicked(QAbstractButton*))
                                                        : SIGNAL(finished(int));
     connect(this, signal, receiver, member);
     d->signalToDisconnectOnClose = signal;
     d->receiverToDisconnectOnClose = receiver;
     d->memberToDisconnectOnClose = member;
     QDialog::open();
 }

◆ question() [1/4]

QMessageBox::StandardButton QMessageBox::question	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		StandardButtons	buttons = `Ok`,
		StandardButton	defaultButton = `NoButton`
	)

static

Opens a question message box with the given title and text in front of the specified parent widget.

Since: 4.2

The standard buttons are added to the message box. defaultButton specifies the button used when Enter is pressed. defaultButton must refer to a button that was given in buttons. If defaultButton is QMessageBox::NoButton, QMessageBox chooses a suitable default automatically.

Returns the identity of the standard button that was clicked. If Esc was pressed instead, the Default and Escape Keys {escape button} is returned.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: information(), warning(), critical()

Definition at line 1675 of file qmessagebox.cpp.

Referenced by QUnixPrintWidgetPrivate::checkFields().

 {
     return showNewMessageBox(parent, Question, title, text, buttons, defaultButton);
 }

◆ question() [2/4]

int QMessageBox::question	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		int	button0,
		int	button1 = `0`,
		int	button2 = `0`
	)

static

Opens a question message box with the given title and text.

The dialog may have up to three buttons. Each of the buttons, button0, button1 and button2 may be set to one of the following values:

If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton.

One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape.

Returns the identity (QMessageBox::Yes, or QMessageBox::No, etc.) of the button that was clicked.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: information(), warning(), critical()

Definition at line 2239 of file qmessagebox.cpp.

 {
     return QMessageBoxPrivate::showOldMessageBox(parent, Question, title, text,
                                                    button0, button1, button2);
 }

◆ question() [3/4]

int QMessageBox::question	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		const QString &	button0Text,
		const QString &	button1Text = `QString()`,
		const QString &	button2Text = `QString()`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)

static

Displays a question message box with the given title and text, as well as one, two or three buttons.

button0Text is the text of the first button, and is optional. If button0Text is not supplied, "OK" (translated) will be used. button1Text is the text of the second button, and is optional. button2Text is the text of the third button, and is optional. defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1 or 2 to make pressing Escape equivalent to clicking the relevant button.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: information(), warning(), critical()

Definition at line 2278 of file qmessagebox.cpp.

 {
     return QMessageBoxPrivate::showOldMessageBox(parent, Question, title, text,
                                                    button0Text, button1Text, button2Text,
                                                    defaultButtonNumber, escapeButtonNumber);
 }

◆ question() [4/4]

int QMessageBox::question	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		StandardButton	button0,
		StandardButton	button1
	)

inlinestatic

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

Needed for Qt 4 source compatibility

Definition at line 242 of file qmessagebox.h.

245 { return question(parent, title, text, StandardButtons(button0), button1); }

QMessageBox::question

static StandardButton question(QWidget *parent, const QString &title, const QString &text, StandardButtons buttons=Ok, StandardButton defaultButton=NoButton)

Opens a question message box with the given title and text in front of the specified parent widget...

Definition: qmessagebox.cpp:1675

◆ removeButton()

void QMessageBox::removeButton ( QAbstractButton * button )

Removes button from the button box without deleting it.

Since: 4.2

See also: addButton(), setStandardButtons()

Definition at line 890 of file qmessagebox.cpp.

Referenced by addButton(), and setDetailedText().

 {
     Q_D(QMessageBox);
     d->customButtonList.removeAll(button);
     if (d->escapeButton == button)
         d->escapeButton = 0;
     if (d->defaultButton == button)
         d->defaultButton = 0;
     d->buttonBox->removeButton(button);
     d->updateSize();
 }

◆ resizeEvent()

void QMessageBox::resizeEvent ( QResizeEvent * event )

protectedvirtual

Reimplemented Function

Reimplemented from QDialog.

Definition at line 1352 of file qmessagebox.cpp.

 {
     QDialog::resizeEvent(event);
 }

◆ setButtonText()

void QMessageBox::setButtonText	(	int	button,
		const QString &	text
	)

Sets the text of the message box button button to text.

Setting the text of a button that is not in the message box is silently ignored.

Use addButton() instead.

Definition at line 2509 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     if (QAbstractButton *abstractButton = d->abstractButtonForId(button)) {
         abstractButton->setText(text);
     } else if (d->buttonBox->buttons().isEmpty() && (button == Ok || button == Old_Ok)) {
         // for compatibility with Qt 4.0/4.1
         addButton(QMessageBox::Ok)->setText(text);
     }
 }

◆ setDefaultButton() [1/2]

void QMessageBox::setDefaultButton ( QPushButton * button )

Sets the message box's default button to button.

Since: 4.2

See also: addButton(), QPushButton::setDefault()

Definition at line 1131 of file qmessagebox.cpp.

Referenced by aboutQt(), setDefaultButton(), setWindowModality(), showNewMessageBox(), and QMessageBoxPrivate::showOldMessageBox().

 {
     Q_D(QMessageBox);
     if (!d->buttonBox->buttons().contains(button))
         return;
     d->defaultButton = button;
     button->setDefault(true);
     button->setFocus();
 }

◆ setDefaultButton() [2/2]

void QMessageBox::setDefaultButton ( QMessageBox::StandardButton button )

Sets the message box's default button to button.

Since: 4.3

See also: addButton(), QPushButton::setDefault()

Definition at line 1152 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     setDefaultButton(d->buttonBox->button(QDialogButtonBox::StandardButton(button)));
 }

◆ setDetailedText()

void QMessageBox::setDetailedText ( const QString & text )

Definition at line 2541 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     if (text.isEmpty()) {
         delete d->detailsText;
         d->detailsText = 0;
         removeButton(d->detailsButton);
         delete d->detailsButton;
         d->detailsButton = 0;
         return;
     }
 
     if (!d->detailsText) {
         d->detailsText = new QMessageBoxDetailsText(this);
         QGridLayout* grid = qobject_cast<QGridLayout*>(layout());
         if (grid)
             grid->addWidget(d->detailsText, grid->rowCount(), 0, 1, grid->columnCount());
         d->detailsText->hide();
     }
     if (!d->detailsButton)
         d->detailsButton = new DetailButton(this);
     d->detailsText->setText(text);
 }

◆ setEscapeButton() [1/2]

void QMessageBox::setEscapeButton ( QAbstractButton * button )

Sets the button that gets activated when the Escape key is pressed to button.

Since: 4.2

See also: addButton(), clickedButton()

Definition at line 1010 of file qmessagebox.cpp.

Referenced by setEscapeButton(), and QMessageBoxPrivate::showOldMessageBox().

 {
     Q_D(QMessageBox);
     if (d->buttonBox->buttons().contains(button))
         d->escapeButton = button;
 }

◆ setEscapeButton() [2/2]

void QMessageBox::setEscapeButton ( QMessageBox::StandardButton button )

Sets the buttons that gets activated when the Escape key is pressed to button.

Since: 4.3

See also: addButton(), clickedButton()

Definition at line 1028 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     setEscapeButton(d->buttonBox->button(QDialogButtonBox::StandardButton(button)));
 }

◆ setIcon()

void QMessageBox::setIcon ( Icon icon )

Definition at line 1245 of file qmessagebox.cpp.

Referenced by changeEvent(), QMessageBox(), and setWindowModality().

 {
     Q_D(QMessageBox);
     setIconPixmap(QMessageBoxPrivate::standardIcon((QMessageBox::Icon)icon,
                                                    this));
     d->icon = icon;
 }

◆ setIconPixmap()

void QMessageBox::setIconPixmap ( const QPixmap & pixmap )

Definition at line 1276 of file qmessagebox.cpp.

Referenced by about(), aboutQt(), and setIcon().

 {
     Q_D(QMessageBox);
     d->iconLabel->setPixmap(pixmap);
     d->updateSize();
     d->icon = NoIcon;
 }

◆ setInformativeText()

void QMessageBox::setInformativeText ( const QString & text )

Definition at line 2592 of file qmessagebox.cpp.

Referenced by aboutQt().

 {
     Q_D(QMessageBox);
     if (text.isEmpty()) {
         layout()->removeWidget(d->informativeLabel);
         delete d->informativeLabel;
         d->informativeLabel = 0;
 #ifndef Q_WS_MAC
         d->label->setContentsMargins(2, 0, 0, 0);
 #endif
         d->updateSize();
         return;
     }
 
     if (!d->informativeLabel) {
         QLabel *label = new QLabel(this);
         label->setObjectName(QLatin1String("qt_msgbox_informativelabel"));
         label->setTextInteractionFlags(Qt::TextInteractionFlags(style()->styleHint(QStyle::SH_MessageBox_TextInteractionFlags, 0, this)));
         label->setAlignment(Qt::AlignTop | Qt::AlignLeft);
         label->setOpenExternalLinks(true);
         label->setWordWrap(true);
 #ifndef Q_WS_MAC
         d->label->setContentsMargins(2, 0, 0, 0);
         label->setContentsMargins(2, 0, 0, 6);
         label->setIndent(9);
 #else
         label->setContentsMargins(16, 0, 0, 0);
         // apply a smaller font the information label on the mac
         label->setFont(qt_app_fonts_hash()->value("QTipLabel"));
 #endif
         label->setWordWrap(true);
         QGridLayout *grid = static_cast<QGridLayout *>(layout());
 #if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5)
         label->hide();
         QTextBrowser *textBrowser = new QTextBrowser(this);
         textBrowser->setOpenExternalLinks(true);
 #if defined(Q_OS_SYMBIAN)
         const int preferredTextColumn = (QApplication::layoutDirection() == Qt::LeftToRight) ? 0 : 1;
 #else
         const int preferredTextColumn = 1;
 #endif
         grid->addWidget(textBrowser, 1, preferredTextColumn, 1, 1);
         d->textBrowser = textBrowser;
 #else
         grid->addWidget(label, 1, 1, 1, 1);
 #endif
         d->informativeLabel = label;
     }
     d->informativeLabel->setText(text);
 
 #if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5)
     //We need to put the informative label inside textBrowser to enable scrolling of long texts.
     d->textBrowser->setText(d->informativeLabel->text());
 #endif
 
     d->updateSize();
 }

◆ setStandardButtons()

void QMessageBox::setStandardButtons ( StandardButtons buttons )

Definition at line 916 of file qmessagebox.cpp.

Referenced by QMessageBox().

 {
     Q_D(QMessageBox);
     d->buttonBox->setStandardButtons(QDialogButtonBox::StandardButtons(int(buttons)));
 
     QList<QAbstractButton *> buttonList = d->buttonBox->buttons();
     if (!buttonList.contains(d->escapeButton))
         d->escapeButton = 0;
     if (!buttonList.contains(d->defaultButton))
         d->defaultButton = 0;
     d->autoAddOkButton = false;
     d->updateSize();
 }

◆ setText()

void QMessageBox::setText ( const QString & text )

Definition at line 1180 of file qmessagebox.cpp.

Referenced by aboutQt().

 {
     Q_D(QMessageBox);
     d->label->setText(text);
     d->label->setWordWrap(d->label->textFormat() == Qt::RichText
         || (d->label->textFormat() == Qt::AutoText && Qt::mightBeRichText(text)));
     d->updateSize();
 }

◆ setTextFormat()

void QMessageBox::setTextFormat ( Qt::TextFormat format )

Definition at line 1303 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     d->label->setTextFormat(format);
     d->label->setWordWrap(format == Qt::RichText
                     || (format == Qt::AutoText && Qt::mightBeRichText(d->label->text())));
     d->updateSize();
 }

◆ setVisible()

void QMessageBox::setVisible ( bool visible )

virtual

Reimplemented Function

Reimplemented from QDialog.

Definition at line 1472 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     if (visible)
         d->hideSpecial();
     QDialog::setVisible(visible);
 }

◆ setWindowModality()

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

This function shadows QWidget::setWindowModality().

Since: 4.2

Sets the modality of the message box to windowModality.

On Mac OS X, if the modality is set to Qt::WindowModal and the message box has a parent, then the message box will be a Qt::Sheet, otherwise the message box will be a standard dialog.

Definition at line 2687 of file qmessagebox.cpp.

 {
     QDialog::setWindowModality(windowModality);
 
     if (parentWidget() && windowModality == Qt::WindowModal)
         setParent(parentWidget(), Qt::Sheet);
     else
         setParent(parentWidget(), Qt::Dialog);
     setDefaultButton(d_func()->defaultButton);
 }

◆ setWindowTitle()

void QMessageBox::setWindowTitle ( const QString & title )

This function shadows QWidget::setWindowTitle().

Since: 4.2

Sets the title of the message box to title. On Mac OS X, the window title is ignored (as required by the Mac OS X Guidelines).

Definition at line 2662 of file qmessagebox.cpp.

Referenced by aboutQt().

 {
     // Message boxes on the mac do not have a title
 #ifndef Q_WS_MAC
     QDialog::setWindowTitle(title);
 #else
     Q_UNUSED(title);
 #endif
 }

◆ showEvent()

void QMessageBox::showEvent ( QShowEvent * event )

protectedvirtual

Reimplemented Function

Reimplemented from QDialog.

Definition at line 1543 of file qmessagebox.cpp.

 {
     Q_D(QMessageBox);
     if (d->autoAddOkButton) {
         addButton(Ok);
 #if defined(Q_WS_WINCE)
         d->hideSpecial();
 #endif
     }
     if (d->detailsButton)
         addButton(d->detailsButton, QMessageBox::ActionRole);
     d->detectEscapeButton();
     d->updateSize();
 
 #ifndef QT_NO_ACCESSIBILITY
     QAccessible::updateAccessibility(this, 0, QAccessible::Alert);
 #endif
 #ifdef Q_WS_WIN
     HMENU systemMenu = GetSystemMenu((HWND)winId(), FALSE);
     if (!d->detectedEscapeButton) {
         EnableMenuItem(systemMenu, SC_CLOSE, MF_BYCOMMAND|MF_GRAYED);
     }
     else {
         EnableMenuItem(systemMenu, SC_CLOSE, MF_BYCOMMAND|MF_ENABLED);
     }
 #endif
     QDialog::showEvent(e);
 }

◆ sizeHint()

QSize QMessageBox::sizeHint ( ) const

virtual

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

Reimplemented from QDialog.

Definition at line 1905 of file qmessagebox.cpp.

 {
     // ### Qt 5: remove
     return QDialog::sizeHint();
 }

◆ standardButton()

QMessageBox::StandardButton QMessageBox::standardButton ( QAbstractButton * button ) const

Returns the standard button enum value corresponding to the given button, or NoButton if the given button isn't a standard button.

Since: 4.2

See also: button(), standardButtons()

Definition at line 947 of file qmessagebox.cpp.

Referenced by showNewMessageBox().

 {
     Q_D(const QMessageBox);
     return (QMessageBox::StandardButton)d->buttonBox->standardButton(button);
 }

◆ standardButtons()

StandardButtons QMessageBox::standardButtons ( ) const

Referenced by setStandardButtons().

◆ standardIcon()

QPixmap QMessageBox::standardIcon ( Icon icon )

static

Returns the pixmap used for a standard icon.

This allows the pixmaps to be used in more complex message boxes. icon specifies the required icon, e.g. QMessageBox::Question, QMessageBox::Information, QMessageBox::Warning or QMessageBox::Critical.

Call QStyle::standardIcon() with QStyle::SP_MessageBoxInformation etc. instead.

Definition at line 2844 of file qmessagebox.cpp.

Referenced by QErrorMessage::QErrorMessage(), and setWindowModality().

 {
     return QMessageBoxPrivate::standardIcon(icon, 0);
 }

◆ text()

QString QMessageBox::text ( ) const

Referenced by about(), setDefaultButton(), and setWindowModality().

◆ textFormat()

Qt::TextFormat QMessageBox::textFormat ( ) const

Referenced by setIconPixmap().

◆ warning() [1/4]

QMessageBox::StandardButton QMessageBox::warning	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		StandardButtons	buttons = `Ok`,
		StandardButton	defaultButton = `NoButton`
	)

static

Opens a warning message box with the given title and text in front of the specified parent widget.

Since: 4.2

The standard buttons are added to the message box. defaultButton specifies the button used when Enter is pressed. defaultButton must refer to a button that was given in buttons. If defaultButton is QMessageBox::NoButton, QMessageBox chooses a suitable default automatically.

Returns the identity of the standard button that was clicked. If Esc was pressed instead, the Default and Escape Keys {escape button} is returned.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: question(), information(), critical()

Definition at line 1710 of file qmessagebox.cpp.

Referenced by QFileDialogPrivate::_q_deleteCurrent(), QFileDialogPrivate::_q_goToDirectory(), QPrintDialogPrivate::_q_okClicked(), QFileDialog::accept(), QUnixPrintWidgetPrivate::checkFields(), and QPrintDialogPrivate::openWindowsPrintDialogModally().

 {
     return showNewMessageBox(parent, Warning, title, text, buttons, defaultButton);
 }

◆ warning() [2/4]

int QMessageBox::warning	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		int	button0,
		int	button1,
		int	button2 = `0`
	)

static

Opens a warning message box with the given title and text.

The dialog may have up to three buttons. Each of the button parameters, button0, button1 and button2 may be set to one of the following values:

If you don't want all three buttons, set the last button, or last two buttons to QMessageBox::NoButton.

One button can be OR-ed with QMessageBox::Default, and one button can be OR-ed with QMessageBox::Escape.

Returns the identity (QMessageBox::Ok or QMessageBox::No or ...) of the button that was clicked.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: information(), question(), critical()

Definition at line 2331 of file qmessagebox.cpp.

 {
     return QMessageBoxPrivate::showOldMessageBox(parent, Warning, title, text,
                                                    button0, button1, button2);
 }

◆ warning() [3/4]

int QMessageBox::warning	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		const QString &	button0Text,
		const QString &	button1Text = `QString()`,
		const QString &	button2Text = `QString()`,
		int	defaultButtonNumber = `0`,
		int	escapeButtonNumber = `-1`
	)

static

Displays a warning message box with the given title and text, as well as one, two, or three buttons.

button0Text is the text of the first button, and is optional. If button0Text is not supplied, "OK" (translated) will be used. button1Text is the text of the second button, and is optional, and button2Text is the text of the third button, and is optional. defaultButtonNumber (0, 1 or 2) is the index of the default button; pressing Return or Enter is the same as clicking the default button. It defaults to 0 (the first button). escapeButtonNumber is the index of the Escape button; pressing Escape is the same as clicking this button. It defaults to -1; supply 0, 1, or 2 to make pressing Escape equivalent to clicking the relevant button.

The message box is an application modal dialog box.

Warning: Do not delete parent during the execution of the dialog. If you want to do this, you should create the dialog yourself using one of the QMessageBox constructors.

See also: information(), question(), critical()

Definition at line 2370 of file qmessagebox.cpp.

 {
     return QMessageBoxPrivate::showOldMessageBox(parent, Warning, title, text,
                                                    button0Text, button1Text, button2Text,
                                                    defaultButtonNumber, escapeButtonNumber);
 }

◆ warning() [4/4]

int QMessageBox::warning	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		StandardButton	button0,
		StandardButton	button1
	)

inlinestatic

Definition at line 257 of file qmessagebox.h.

260 { return warning(parent, title, text, StandardButtons(button0), button1); }

QMessageBox::warning

static StandardButton warning(QWidget *parent, const QString &title, const QString &text, StandardButtons buttons=Ok, StandardButton defaultButton=NoButton)

Opens a warning message box with the given title and text in front of the specified parent widget...

Definition: qmessagebox.cpp:1710

Properties

◆ detailedText

QString QMessageBox::detailedText

private

the text to be displayed in the details area.

Since: 4.2

The text will be interpreted as a plain text.

By default, this property contains an empty string.

See also: QMessageBox::text, QMessageBox::informativeText

Definition at line 71 of file qmessagebox.h.

◆ icon

QMessageBox::Icon QMessageBox::icon

private

the message box's icon

The icon of the message box can be specified with one of the values:

The default is QMessageBox::NoIcon.

The pixmap used to display the actual icon depends on the current GUI style. You can also set a custom pixmap for the icon by setting the icon pixmap property.

See also: iconPixmap

Definition at line 66 of file qmessagebox.h.

◆ iconPixmap

QPixmap QMessageBox::iconPixmap

private

the current icon

The icon currently used by the message box. Note that it's often hard to draw one pixmap that looks appropriate in all GUI styles; you may want to supply a different pixmap for each platform.

By default, this property is undefined.

See also: icon

Definition at line 67 of file qmessagebox.h.

◆ informativeText

QString QMessageBox::informativeText

private

the informative text that provides a fuller description for the message

Since: 4.2

Infromative text can be used to expand upon the text() to give more information to the user. On the Mac, this text appears in small system font below the text(). On other platforms, it is simply appended to the existing text.

By default, this property contains an empty string.

See also: QMessageBox::text, QMessageBox::detailedText

Definition at line 73 of file qmessagebox.h.

◆ standardButtons

QMessageBox::StandardButtons QMessageBox::standardButtons

private

collection of standard buttons in the message box

Since: 4.2

This property controls which standard buttons are used by the message box.

By default, this property contains no standard buttons.

See also: addButton()

Definition at line 69 of file qmessagebox.h.

◆ text

QString QMessageBox::text

private

the message box text to be displayed.

The text will be interpreted either as a plain text or as rich text, depending on the text format setting (QMessageBox::textFormat ). The default setting is Qt::AutoText, i.e., the message box will try to auto-detect the format of the text.

The default value of this property is an empty string.

See also: textFormat, QMessageBox::informativeText, QMessageBox::detailedText

Definition at line 64 of file qmessagebox.h.

Referenced by about().

◆ textFormat

Qt::TextFormat QMessageBox::textFormat

private

the format of the text displayed by the message box

The current text format used by the message box. See the Qt::TextFormat enum for an explanation of the possible options.

The default format is Qt::AutoText.

See also: setText()

Definition at line 68 of file qmessagebox.h.

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

/src/gui/dialogs/qmessagebox.h
/src/gui/dialogs/qmessagebox.cpp

Public Types

Public Slots

Signals

Public Functions

Static Public Functions

Protected Functions

Properties

Additional Inherited Members

Detailed Description

The Property-based API

Rich Text and the Text Format Property

Severity Levels and the Icon and Pixmap Properties

The Static Functions API

Advanced Usage

Default and Escape Keys

Typedefs

◆ Button

Enumerations

◆ ButtonRole

◆ Icon

◆ StandardButton

Constructors and Destructors

◆ QMessageBox() [1/3]

◆ QMessageBox() [2/3]

◆ ~QMessageBox()

◆ QMessageBox() [3/3]

Functions

◆ about()

◆ aboutQt()

◆ addButton() [1/3]

◆ addButton() [2/3]

◆ addButton() [3/3]

◆ button()

◆ buttonClicked

◆ buttonRole()

◆ buttons()

◆ buttonText()

◆ changeEvent()

◆ clickedButton()

◆ closeEvent()

◆ critical() [1/4]

◆ critical() [2/4]

◆ critical() [3/4]

◆ critical() [4/4]

◆ defaultButton()

◆ detailedText()

◆ escapeButton()

◆ event()

◆ exec

◆ icon()

◆ iconPixmap()

◆ information() [1/4]

◆ information() [2/4]

◆ information() [3/4]

◆ information() [4/4]

◆ informativeText()

◆ keyPressEvent()

◆ open()

◆ question() [1/4]

◆ question() [2/4]

◆ question() [3/4]

◆ question() [4/4]

Needed for Qt 4 source compatibility

◆ removeButton()

◆ resizeEvent()

◆ setButtonText()

◆ setDefaultButton() [1/2]

◆ setDefaultButton() [2/2]

◆ setDetailedText()

◆ setEscapeButton() [1/2]

◆ setEscapeButton() [2/2]

◆ setIcon()

◆ setIconPixmap()

◆ setInformativeText()

◆ setStandardButtons()

◆ setText()

◆ setTextFormat()

◆ setVisible()

◆ setWindowModality()

◆ setWindowTitle()