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:

Collaboration diagram for QMessageBox:

Public Types
enum class	Option { DontUseNativeDialog = 0x00000001 }

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

enum	ButtonRole { InvalidRole = -1 , AcceptRole , RejectRole , DestructiveRole , ActionRole , HelpRole , YesRole , NoRole , ResetRole , ApplyRole , NRoles }

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 }

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 , PdmDevicePixelRatio , PdmDevicePixelRatioScaled }

Public Slots
virtual void	open ()

Public Slots inherited from QDialog
virtual void	open ()

virtual int	exec ()
	Shows the dialog as a \l{QDialog::Modal Dialogs}{modal dialog}, blocking until the user closes it.

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

virtual void	accept ()
	Hides the modal dialog and sets the result code to `Accepted`.

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

Public Slots inherited from QWidget
void	setEnabled (bool)

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

void	setWindowModified (bool)

void	setWindowTitle (const QString &)

void	setStyleSheet (const QString &styleSheet)

void	setFocus ()
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Gives the keyboard input focus to this widget (or its focus proxy) if this widget or one of its parents is the \l{isActiveWindow()}{active window}.

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

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

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

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

void	hide ()
	Hides the widget.

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

void	showMaximized ()
	Shows the widget maximized.

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

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

bool	close ()
	Closes this widget.

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

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

Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe

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

Signals inherited from QDialog
void	finished (int result)

void	accepted ()

void	rejected ()

Signals inherited from QWidget
void	windowTitleChanged (const QString &title)
	This signal is emitted when the window's title has changed, with the new title as an argument.

void	windowIconChanged (const QIcon &icon)
	This signal is emitted when the window's icon has changed, with the new icon as an argument.

void	windowIconTextChanged (const QString &iconText)
	This signal is emitted when the window's icon text has changed, with the new iconText as an argument.

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

Signals inherited from QObject
void	destroyed (QObject *=nullptr)
	This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.

void	objectNameChanged (const QString &objectName, QPrivateSignal)
	This signal is emitted after the object's name has been changed.

Public Member Functions
	QMessageBox (QWidget *parent=nullptr)
	Constructs an \l{Qt::ApplicationModal} {application modal} message box with no text and no buttons.

	QMessageBox (Icon icon, const QString &title, const QString &text, StandardButtons buttons=NoButton, QWidget *parent=nullptr, Qt::WindowFlags flags=Qt::Dialog\|Qt::MSWindowsFixedSizeDialogHint)
	Constructs an \l{Qt::ApplicationModal} {application modal} message box with the given icon, title, text, and standard buttons.

	~QMessageBox ()
	Destroys the message box.

void	addButton (QAbstractButton *button, ButtonRole role)

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

QPushButton *	addButton (StandardButton button)

void	removeButton (QAbstractButton *button)

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.

QList< QAbstractButton * >	buttons () const

ButtonRole	buttonRole (QAbstractButton *button) const

void	setStandardButtons (StandardButtons buttons)

StandardButtons	standardButtons () const

StandardButton	standardButton (QAbstractButton *button) const

QAbstractButton *	button (StandardButton which) const

QPushButton *	defaultButton () const

void	setDefaultButton (QPushButton *button)

void	setDefaultButton (StandardButton button)

QAbstractButton *	escapeButton () const

void	setEscapeButton (QAbstractButton *button)

void	setEscapeButton (StandardButton button)

QAbstractButton *	clickedButton () const

QString	text () const

void	setText (const QString &text)

Icon	icon () const

void	setIcon (Icon)

QPixmap	iconPixmap () const

void	setIconPixmap (const QPixmap &pixmap)

Qt::TextFormat	textFormat () const

void	setTextFormat (Qt::TextFormat format)

void	setTextInteractionFlags (Qt::TextInteractionFlags flags)

Qt::TextInteractionFlags	textInteractionFlags () const

void	setCheckBox (QCheckBox *cb)

QCheckBox *	checkBox () const

void	setOption (Option option, bool on=true)

bool	testOption (Option option) const

void	setOptions (Options options)

Options	options () const

QString	informativeText () const

void	setInformativeText (const QString &text)

void	setWindowTitle (const QString &title)

void	setWindowModality (Qt::WindowModality windowModality)

Public Member Functions inherited from QDialog
	QDialog (QWidget *parent=nullptr, Qt::WindowFlags f=Qt::WindowFlags())
	Constructs a dialog with parent parent.

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

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

void	setVisible (bool visible) override
	\reimp

QSize	sizeHint () const override
	\reimp

QSize	minimumSizeHint () const override
	\reimp

void	setSizeGripEnabled (bool)

bool	isSizeGripEnabled () const

void	setModal (bool modal)

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

Public Member Functions inherited from QWidget
	QWidget (QWidget *parent=nullptr, Qt::WindowFlags f=Qt::WindowFlags())
	Constructs a widget which is a child of parent, with widget flags set to f.

	~QWidget ()
	Destroys the widget.

int	devType () const override

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

void	createWinId ()

WId	internalWinId () const

WId	effectiveWinId () const

QStyle *	style () const

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

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

bool	isModal () const

Qt::WindowModality	windowModality () const

void	setWindowModality (Qt::WindowModality windowModality)

bool	isEnabled () const

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

QRect	frameGeometry () const

const QRect &	geometry () const

QRect	normalGeometry () const

int	x () const

int	y () const

QPoint	pos () const

QSize	frameSize () const

QSize	size () const

int	width () const

int	height () const

QRect	rect () const

QRect	childrenRect () const

QRegion	childrenRegion () const

QSize	minimumSize () const

QSize	maximumSize () const

int	minimumWidth () const

int	minimumHeight () const

int	maximumWidth () const

int	maximumHeight () const

void	setMinimumSize (const QSize &)

void	setMinimumSize (int minw, int minh)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This function corresponds to setMinimumSize(QSize(minw, minh)).

void	setMaximumSize (const QSize &)

void	setMaximumSize (int maxw, int maxh)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This function corresponds to setMaximumSize(QSize(maxw, maxh)).

void	setMinimumWidth (int minw)

void	setMinimumHeight (int minh)

void	setMaximumWidth (int maxw)

void	setMaximumHeight (int maxh)

QSize	sizeIncrement () const

void	setSizeIncrement (const QSize &)

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

QSize	baseSize () const

void	setBaseSize (const QSize &)

void	setBaseSize (int basew, int baseh)
	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 setBaseSize(QSize(basew, baseh)).

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

void	setFixedSize (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.Sets the width of the widget to w and the height to h.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

QWidget *	nativeParentWidget () const

QWidget *	topLevelWidget () const

const QPalette &	palette () const

void	setPalette (const QPalette &)

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

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

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

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

const QFont &	font () const

void	setFont (const QFont &)

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

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

QCursor	cursor () const

void	setCursor (const QCursor &)

void	unsetCursor ()

void	setMouseTracking (bool enable)

bool	hasMouseTracking () const

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

void	setTabletTracking (bool enable)

bool	hasTabletTracking () const

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

void	setMask (const QRegion &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Causes only the parts of the widget which overlap region to be visible.

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

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

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

void	render (QPainter *painter, const QPoint &targetOffset=QPoint(), const QRegion &sourceRegion=QRegion(), RenderFlags renderFlags=RenderFlags(DrawWindowBackground\|DrawChildren))
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Renders the widget into the painter's QPainter::device().

Q_INVOKABLE QPixmap	grab (const QRect &rectangle=QRect(QPoint(0, 0), QSize(-1, -1)))

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

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

QString	styleSheet () const

QString	windowTitle () const

void	setWindowIcon (const QIcon &icon)

QIcon	windowIcon () const

void	setWindowIconText (const QString &)

QString	windowIconText () const

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

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

void	setWindowFilePath (const QString &filePath)

QString	windowFilePath () const

void	setWindowOpacity (qreal level)

qreal	windowOpacity () const

bool	isWindowModified () const

void	setLayoutDirection (Qt::LayoutDirection direction)

Qt::LayoutDirection	layoutDirection () const

void	unsetLayoutDirection ()

void	setLocale (const QLocale &locale)

QLocale	locale () const

void	unsetLocale ()

bool	isRightToLeft () const

bool	isLeftToRight () const

bool	isActiveWindow () const

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

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

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 \l{isActiveWindow()}{active window}.

Qt::FocusPolicy	focusPolicy () const

void	setFocusPolicy (Qt::FocusPolicy policy)

bool	hasFocus () const

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

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

Qt::ContextMenuPolicy	contextMenuPolicy () const

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	grabMouse ()
	Grabs the mouse input.

void	grabMouse (const QCursor &)

void	releaseMouse ()
	Releases the mouse grab.

void	grabKeyboard ()
	Grabs the keyboard input.

void	releaseKeyboard ()
	Releases the keyboard grab.

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.

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

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

void	setShortcutAutoRepeat (int id, bool enable=true)

bool	updatesEnabled () const

void	setUpdatesEnabled (bool enable)

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

void	update (const QRect &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version updates a rectangle rect inside the widget.

void	update (const QRegion &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version repaints a region rgn inside the widget.

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

void	repaint (const QRect &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version repaints a rectangle rect inside the widget.

void	repaint (const QRegion &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version repaints a region rgn inside the widget.

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

void	move (int x, int y)
	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 move(QPoint(x, y)).

void	move (const QPoint &)

void	resize (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 resize(QSize(w, h)).

void	resize (const QSize &)

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)).

void	setGeometry (const QRect &)

QByteArray	saveGeometry () const

bool	restoreGeometry (const QByteArray &geometry)

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

bool	isVisible () const

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

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

bool	isMinimized () const

bool	isMaximized () const

bool	isFullScreen () const

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

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

void	overrideWindowState (Qt::WindowStates state)

QSizePolicy	sizePolicy () const

void	setSizePolicy (QSizePolicy)

void	setSizePolicy (QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Sets the size policy of the widget to horizontal and vertical, with standard stretch and no height-for-width.

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

virtual bool	hasHeightForWidth () const

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

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.

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

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

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

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

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

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

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

void	setParent (QWidget *parent, Qt::WindowFlags f)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This function also takes widget flags, f as an argument.

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

void	scroll (int dx, int dy, const QRect &)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.This version only scrolls r and does not move the children of the widget.

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

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

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

bool	acceptDrops () const

void	setAcceptDrops (bool on)

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

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

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

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

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

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

QAction *	addAction (const QString &text)

QAction *	addAction (const QIcon &icon, const QString &text)

QAction *	addAction (const QString &text, const QObject receiver, const char member, Qt::ConnectionType type=Qt::AutoConnection)

QAction *	addAction (const QIcon &icon, const QString &text, const QObject receiver, const char member, Qt::ConnectionType type=Qt::AutoConnection)

template<typename... Args, typename = compatible_action_slot_args<Args...>>
QAction *	addAction (const QString &text, Args &&...args)

template<typename... Args, typename = compatible_action_slot_args<Args...>>
QAction *	addAction (const QIcon &icon, const QString &text, Args &&...args)

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

void	setWindowFlags (Qt::WindowFlags type)

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

void	setWindowFlag (Qt::WindowType, bool on=true)

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

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

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

QWidget *	childAt (const QPoint &p) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Returns the visible child widget at point p in the widget's own coordinate system.

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

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

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

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

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`.

bool	autoFillBackground () const

void	setAutoFillBackground (bool enabled)

QBackingStore *	backingStore () const

QWindow *	windowHandle () const
	If this is a native widget, return the associated QWindow.

QScreen *	screen () const
	Returns the screen the widget is on.

void	setScreen (QScreen *)
	Sets the screen on which the widget should be shown to screen.

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

Qt::InputMethodHints	inputMethodHints () const

void	setInputMethodHints (Qt::InputMethodHints hints)

Public Member Functions inherited from QObject
Q_INVOKABLE	QObject (QObject *parent=nullptr)
	Constructs an object with parent object parent.

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

QString	objectName () const

Q_WEAK_OVERLOAD void	setObjectName (const QString &name)
	Sets the object's name to name.

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

QBindable< QString >	bindableObjectName ()

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

bool	isWindowType () const
	Returns `true` if the object is a window; otherwise returns `false`.

bool	isQuickItemType () const
	Returns `true` if the object is a QQuickItem; otherwise returns `false`.

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

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

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

bool	moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
	Changes the thread affinity for this object and its children and returns `true` on success.

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
	This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.

int	startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)

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

void	killTimer (Qt::TimerId id)

template<typename T >
T	findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.

template<typename T >
QList< T >	findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) 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.

template<typename T >
T	findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

template<typename T >
QList< T >	findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

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

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

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

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

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

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

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

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

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

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

bool	setProperty (const char *name, QVariant &&value)

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

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

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

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`.

Public Member Functions inherited from QPaintDevice
virtual	~QPaintDevice ()

bool	paintingActive () const

int	width () const

int	height () const

int	widthMM () const

int	heightMM () const

int	logicalDpiX () const

int	logicalDpiY () const

int	physicalDpiX () const

int	physicalDpiY () const

qreal	devicePixelRatio () const

qreal	devicePixelRatioF () const

int	colorCount () const

int	depth () const

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

static StandardButton	question (QWidget *parent, const QString &title, const QString &text, StandardButtons buttons=StandardButtons(Yes\|No), StandardButton defaultButton=NoButton)

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

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

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

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 \nullptr).

Static Public Member Functions inherited from QWidget
static void	setTabOrder (QWidget , QWidget )
	Puts the second widget after the first widget in the focus order.

static void	setTabOrder (std::initializer_list< QWidget * > widgets)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

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

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

static QWidget *	find (WId)
	Returns a pointer to the widget with window identifier/handle id.

static QWidget *	createWindowContainer (QWindow window, QWidget parent=nullptr, Qt::WindowFlags flags=Qt::WindowFlags())
	Creates a QWidget that makes it possible to embed window into a QWidget-based application.

Static Public Member Functions inherited from QObject
static QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)
	\threadsafe

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

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)
	\threadsafe

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

static bool	disconnect (const QMetaObject::Connection &)
	Disconnect a connection.

template<typename Func1 , typename Func2 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot)

template<typename Func1 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject receiver, void **zero)

Static Public Member Functions inherited from QPaintDevice
static qreal	devicePixelRatioFScale ()

Protected Member Functions
bool	event (QEvent *e) override
	\reimp

void	resizeEvent (QResizeEvent *event) override
	\reimp

void	showEvent (QShowEvent *event) override
	\reimp

void	closeEvent (QCloseEvent *event) override
	\reimp

void	keyPressEvent (QKeyEvent *event) override
	\reimp

void	changeEvent (QEvent *event) override
	\reimp

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

void	contextMenuEvent (QContextMenuEvent *) override
	\reimp

bool	eventFilter (QObject , QEvent ) override
	\reimp

void	adjustPosition (QWidget *)

Protected Member Functions inherited from QWidget
bool	event (QEvent *event) override
	This is the main event handler; it handles event event.

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

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

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

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

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

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

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

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

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

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

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

virtual void	actionEvent (QActionEvent *event)
	This event handler is called with the given event whenever the widget's actions are changed.

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

virtual bool	nativeEvent (const QByteArray &eventType, void message, qintptr result)
	This special event handler can be reimplemented in a subclass to receive native platform events identified by eventType which are passed in the message parameter.

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

void	initPainter (QPainter *painter) const override
	Initializes the painter pen, background and font to the same as the given widget's.

QPaintDevice *	redirected (QPoint *offset) const override

QPainter *	sharedPainter () const override

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

void	create (WId=0, bool initializeWindow=true, bool destroyOldWindow=true)
	Creates a new widget window.

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

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.

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

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

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

Protected Member Functions inherited from QObject
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 \nullptr.

int	senderSignalIndex () const

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

bool	isSignalConnected (const QMetaMethod &signal) const

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

virtual void	childEvent (QChildEvent *event)
	This event handler can be reimplemented in a subclass to receive child events.

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

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

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

Protected Member Functions inherited from QPaintDevice
	QPaintDevice () noexcept

Properties
QString	text
	the message box text to be displayed.

Icon	icon
	the message box's icon

QPixmap	iconPixmap
	the current icon

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

StandardButtons	standardButtons
	collection of standard buttons in the message box

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

Qt::TextInteractionFlags	textInteractionFlags

Options	options
	Options that affect the look and feel of the dialog.

Properties inherited from QDialog
bool	sizeGripEnabled
	whether the size grip is enabled

bool	modal
	whether show() should pop up the dialog as modal or modeless

Properties inherited from QWidget
bool	modal
	whether the widget is a modal widget

Qt::WindowModality	windowModality
	which windows are blocked by the modal widget

bool	enabled
	whether the widget is enabled

QRect	geometry
	the geometry of the widget relative to its parent and excluding the window frame

QRect	frameGeometry
	geometry of the widget relative to its parent including any window frame

QRect	normalGeometry
	the geometry of the widget as it will appear when shown as a normal (not maximized or full screen) top-level widget

int	x
	the x coordinate of the widget relative to its parent including any window frame

int	y
	the y coordinate of the widget relative to its parent and including any window frame

QPoint	pos
	the position of the widget within its parent widget

QSize	frameSize
	the size of the widget including any window frame

QSize	size
	the size of the widget excluding any window frame

int	width
	the width of the widget excluding any window frame

int	height
	the height of the widget excluding any window frame

QRect	rect
	the internal geometry of the widget excluding any window frame

QRect	childrenRect
	the bounding rectangle of the widget's children

QRegion	childrenRegion
	the combined region occupied by the widget's children

QSizePolicy	sizePolicy
	the default layout behavior of the widget

QSize	minimumSize
	the widget's minimum size

QSize	maximumSize
	the widget's maximum size in pixels

int	minimumWidth
	the widget's minimum width in pixels

int	minimumHeight
	the widget's minimum height in pixels

int	maximumWidth
	the widget's maximum width in pixels

int	maximumHeight
	the widget's maximum height in pixels

QSize	sizeIncrement
	the size increment of the widget

QSize	baseSize
	the base size of the widget

QPalette	palette
	the widget's palette

QFont	font
	the font currently set for the widget

QCursor	cursor
	the cursor shape for this widget

bool	mouseTracking
	whether mouse tracking is enabled for the widget

bool	tabletTracking
	whether tablet tracking is enabled for the widget

bool	isActiveWindow
	whether this widget's window is the active window

Qt::FocusPolicy	focusPolicy
	the way the widget accepts keyboard focus

bool	focus
	whether this widget (or its focus proxy) has the keyboard input focus

Qt::ContextMenuPolicy	contextMenuPolicy
	how the widget shows a context menu

bool	updatesEnabled
	whether updates are enabled

bool	visible
	whether the widget is visible

bool	minimized
	whether this widget is minimized (iconified)

bool	maximized
	whether this widget is maximized

bool	fullScreen
	whether the widget is shown in full screen mode

QSize	sizeHint
	the recommended size for the widget

QSize	minimumSizeHint
	the recommended minimum size for the widget

bool	acceptDrops
	whether drop events are enabled for this widget

QString	windowTitle
	the window title (caption)

QIcon	windowIcon
	the widget's icon

QString	windowIconText
	the text to be displayed on the icon of a minimized window

double	windowOpacity
	The level of opacity for the window.

bool	windowModified
	whether the document shown in the window has unsaved changes

Qt::LayoutDirection	layoutDirection
	the layout direction for this widget.

bool	autoFillBackground
	whether the widget background is filled automatically

QString	styleSheet
	the widget's style sheet

QLocale	locale
	the widget's locale

QString	windowFilePath
	the file path associated with a widget

Qt::InputMethodHints	inputMethodHints
	What input method specific hints the widget has.

Properties inherited from QObject
QString	objectName
	the name of this object

Additional Inherited Members
Protected Slots inherited from QWidget
void	updateMicroFocus (Qt::InputMethodQuery query=Qt::ImQueryAll)
	Updates the widget's micro focus and informs input methods that the state specified by query has changed.

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Protected Attributes inherited from QPaintDevice
ushort	painters

Related Symbols inherited from QWidget
	setupUi (QWidget *widget)
	\macro QWIDGETSIZE_MAX

Related Symbols inherited from QObject
template< class T > T	qobject_cast (const QObject *object)
	Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr.

template< typename T > T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

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

	QObjectList
	\macro Q_CLASSINFO(Name, Value)

Detailed Description

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

\inmodule QtWidgets

A message box displays a primary \l{QMessageBox::text}{text} to alert the user to a situation, an \l{QMessageBox::informativeText} {informative text} to further explain the situation, and an optional \l{QMessageBox::detailedText} {detailed text} to provide even more data if the user requests it.

A message box can also display an \l{QMessageBox::icon} {icon} and \l{QMessageBox::standardButtons} {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.

Definition at line 21 of file qmessagebox.h.

Member Enumeration Documentation

◆ ButtonRole

enum QMessageBox::ButtonRole

buttonrole-enum

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

Definition at line 53 of file qmessagebox.h.

◆ Icon

enum QMessageBox::Icon

This enum has the following values:

\value NoIcon the message box does not have any icon.

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

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

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

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

Enumerator
NoIcon
Information
Warning
Critical
Question

Definition at line 43 of file qmessagebox.h.

◆ Option

enum class QMessageBox::Option

strong

Since: 6.6 \value DontUseNativeDialog Don't use the native message dialog.

Enumerator
DontUseNativeDialog

Definition at line 38 of file qmessagebox.h.

◆ StandardButton

enum QMessageBox::StandardButton

Since: 4.2

These enums describe flags for standard buttons. Each button has a defined \l ButtonRole.

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

\value NoButton An invalid button.

\omitvalue FirstButton \omitvalue LastButton

The following values are obsolete:

\value YesAll Use YesToAll instead. \value NoAll Use NoToAll instead. \value Default Use the defaultButton argument of information(), warning(), etc. instead, or call setDefaultButton(). \value Escape Call setEscapeButton() instead. \value FlagMask \value 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 70 of file qmessagebox.h.

Constructor & Destructor Documentation

◆ QMessageBox() [1/2]

QMessageBox::QMessageBox ( QWidget * parent = nullptr )

explicit

Constructs an \l{Qt::ApplicationModal} {application modal} message box with no text and no buttons.

parent is passed to the QDialog constructor.

The window modality can be overridden via setWindowModality() before calling show().

Note: Using open() or exec() to show the message box affects the window modality. Please see the detailed documentation for each function for more information.

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

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

Definition at line 838 of file qmessagebox.cpp.

References d.

Referenced by about(), and aboutQt().

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◆ QMessageBox() [2/2]

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

Constructs an \l{Qt::ApplicationModal} {application modal} 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 window modality can be overridden via setWindowModality() before calling show().

Note: Using open() or exec() to show the message box affects the window modality. Please see the detailed documentation for each function for more information.

On \macos, if parent is not \nullptr and you want your message box to appear as a Qt::Sheet of that parent, set the message box's \l{setWindowModality()} {window modality} to Qt::WindowModal (default). Otherwise, the message box will be a standard dialog.

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

Definition at line 863 of file qmessagebox.cpp.

References buttons(), d, icon, NoButton, setIcon(), setStandardButtons(), text, and title.

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◆ ~QMessageBox()

QMessageBox::~QMessageBox ( )

Destroys the message box.

Definition at line 878 of file qmessagebox.cpp.

Member Function Documentation

◆ 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:

\list 1

It prefers \l{QWidget::windowIcon()}{parent->icon()} if that exists.
If not, it tries the top-level widget containing parent.
If that fails, it tries the \l{QApplication::activeWindow()}{active window.}
As a last resort it uses the Information icon. \endlist

The about box has a single button labelled "OK".

On \macos, 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 1945 of file qmessagebox.cpp.

References QMessageBox(), d, QDialog::exec(), icon, Information, msgBox, NoButton, QObject::parent(), QWidget::setAttribute(), setIconPixmap(), QDialog::setModal(), QWidget::show(), text, title, Qt::WA_DeleteOnClose, QWidget::windowIcon, Qt::WindowSystemMenuHint, and Qt::WindowTitleHint.

Referenced by boo().

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◆ 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 \nullptr).

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

This is useful for inclusion in the \uicontrol Help menu of an application, as shown in the \l{mainwindows/menus}{Menus} example.

QApplication provides this functionality as a slot.

On \macos, the aboutQt box is popped up as a modeless window; on other platforms, it is currently application modal.

See also: QApplication::aboutQt()

Definition at line 1999 of file qmessagebox.cpp.

References QMessageBox(), QString::arg(), d, QDialog::exec(), QString::isEmpty(), QPixmap::isNull(), msgBox, QObject::parent(), QStringLiteral, QWidget::setAttribute(), setIconPixmap(), setInformativeText(), QDialog::setModal(), setText(), setWindowTitle(), QWidget::show(), title, tr, and Qt::WA_DeleteOnClose.

Referenced by QApplication::aboutQt().

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◆ addButton() [1/3]

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

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.

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

Definition at line 936 of file qmessagebox.cpp.

References addButton(), d, pushButton, QDialog::QPushButton, and text.

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◆ addButton() [2/3]

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

Since: 4.2

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

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

Definition at line 890 of file qmessagebox.cpp.

References button, d, QString::isEmpty(), QGuiApplicationPrivate::platformTheme(), qWarning, removeButton(), QAbstractButton::setText(), standardButton(), QMessageBoxPrivate::standardButtonForRole(), and QAbstractButton::text.

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

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◆ addButton() [3/3]

QPushButton * QMessageBox::addButton ( StandardButton 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.

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

See also: setStandardButtons()

Definition at line 954 of file qmessagebox.cpp.

References button, d, and pushButton.

◆ button()

QAbstractButton * QMessageBox::button ( StandardButton which ) const

Since: 4.2

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

Note: Modifying the properties of the returned button may not be reflected in native implementations of the message dialog. To customize dialog buttons add a \l{addButton(QAbstractButton *button, QMessageBox::ButtonRole role)} {custom button} or \l{addButton(const QString &text, QMessageBox::ButtonRole role)} {button title} instead, or set the \l Option::DontUseNativeDialog option.

See also: standardButtons, standardButton()

Definition at line 1041 of file qmessagebox.cpp.

References d.

◆ 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 QWidgetPlatformMessageDialog::QWidgetPlatformMessageDialog(), and open().

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◆ buttonRole()

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

Since: 4.5

Returns the button role for the specified button. This function returns \l InvalidRole if button is \nullptr or has not been added to the message box.

See also: buttons(), addButton()

Definition at line 1725 of file qmessagebox.cpp.

References button, and d.

◆ buttons()

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

Since: 4.5

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

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

Definition at line 1711 of file qmessagebox.cpp.

References d.

Referenced by QMessageBox(), critical(), information(), keyPressEvent(), question(), setStandardButtons(), and warning().

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◆ changeEvent()

void QMessageBox::changeEvent ( QEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QWidget.

Definition at line 1556 of file qmessagebox.cpp.

References QEvent::ApplicationFontChange, QWidget::changeEvent(), d, QWidget::font, QEvent::FontChange, NoIcon, Q_FALLTHROUGH, setIcon(), QStyle::SH_MessageBox_CenterButtons, QStyle::SH_MessageBox_TextInteractionFlags, QWidget::style(), and QEvent::StyleChange.

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◆ checkBox()

QCheckBox * QMessageBox::checkBox ( ) const

Since: 5.2

Returns the checkbox shown on the dialog. This is \nullptr if no checkbox is set.

See also: setCheckBox()

Definition at line 1263 of file qmessagebox.cpp.

References d.

◆ clickedButton()

QAbstractButton * QMessageBox::clickedButton ( ) const

Since: 4.2

Returns the button that was clicked by the user, or \nullptr if the user hit the \uicontrol Esc key and no \l{setEscapeButton()}{escape button} was set.

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

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 1171 of file qmessagebox.cpp.

References d.

Referenced by showNewMessageBox().

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◆ closeEvent()

void QMessageBox::closeEvent ( QCloseEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QDialog.

Definition at line 1539 of file qmessagebox.cpp.

References QDialog::closeEvent(), d, QEvent::ignore(), and QDialog::setResult().

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◆ critical()

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

static

Since: 4.2

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

The standard buttons are added to the message box. defaultButton specifies the button used when \uicontrol 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 \uicontrol Esc was pressed instead, the \l{Default and Escape Keys} {escape button} is returned.

The message box is an \l{Qt::ApplicationModal} {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 1917 of file qmessagebox.cpp.

References buttons(), Critical, defaultButton(), QObject::parent(), showNewMessageBox(), text, and title.

Referenced by boo(), QQuickWidgetPrivate::handleContextCreationFailure(), and qRequireVersion().

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◆ defaultButton()

QPushButton * QMessageBox::defaultButton ( ) const

Since: 4.2

Returns the button that should be the message box's \l{QPushButton::setDefault()}{default button}. Returns nullptr if no default button was set.

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

Definition at line 1186 of file qmessagebox.cpp.

References d.

Referenced by critical(), information(), question(), setWindowModality(), showNewMessageBox(), and warning().

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◆ escapeButton()

QAbstractButton * QMessageBox::escapeButton ( ) const

Since: 4.2

Returns the button that is activated when escape is pressed.

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

\list 1

If there is only one button, it is made the escape button.
If there is a \l Cancel button, it is made the escape button.
On \macos only, if there is exactly one button with the role QMessageBox::RejectRole, it is made the escape button. \endlist

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

See also: addButton()

Definition at line 1067 of file qmessagebox.cpp.

References d.

◆ event()

bool QMessageBox::event ( QEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QObject.

Definition at line 1512 of file qmessagebox.cpp.

References QObject::event(), QEvent::LanguageChange, QEvent::LayoutRequest, QDialog::result(), and QEvent::type().

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◆ icon()

QMessageBox::Icon QMessageBox::icon ( ) const

Definition at line 1417 of file qmessagebox.cpp.

References d.

◆ iconPixmap()

QPixmap QMessageBox::iconPixmap ( ) const

Definition at line 1443 of file qmessagebox.cpp.

References d.

◆ information()

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

static

Since: 4.2

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

The standard buttons are added to the message box. defaultButton specifies the button used when \uicontrol 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 \uicontrol Esc was pressed instead, the \l{Default and Escape Keys} {escape button} is returned.

The message box is an \l{Qt::ApplicationModal}{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 1819 of file qmessagebox.cpp.

References buttons(), defaultButton(), Information, QObject::parent(), showNewMessageBox(), text, and title.

Referenced by boo().

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◆ informativeText()

QString QMessageBox::informativeText ( ) const

Definition at line 2696 of file qmessagebox.cpp.

References d.

◆ keyPressEvent()

void QMessageBox::keyPressEvent ( QKeyEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QDialog.

Definition at line 1590 of file qmessagebox.cpp.

References Qt::AltModifier, button, buttons(), QKeySequence::Cancel, QGuiApplication::clipboard(), Qt::ControlModifier, QKeySequence::Copy, d, QKeyEvent::key(), QDialog::keyPressEvent(), Qt::MetaModifier, QKeyEvent::modifiers(), QKeySequence::SelectAll, QEvent::setAccepted(), shortcut, QAbstractButton::text, and QWidget::windowTitle.

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◆ open [1/2]

void QDialog::open ( )

slot

Since: 4.5

Shows the dialog as a \l{QDialog::Modal Dialogs}{window modal dialog}, returning immediately.

See also: exec(), show(), result(), setWindowModality()

Definition at line 52 of file qdialog.cpp.

◆ open() [2/2]

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.

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 1672 of file qmessagebox.cpp.

References buttonClicked(), QObject::connect(), d, QDialog::finished(), QDialog::open(), SIGNAL, and signal.

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◆ options()

QMessageBox::Options QMessageBox::options ( ) const

Definition at line 1316 of file qmessagebox.cpp.

References d.

◆ question()

int QMessageBox::question	(	QWidget *	parent,
		const QString &	title,
		const QString &	text,
		StandardButtons	buttons = StandardButtons(Yes \| No),
		StandardButton	defaultButton = NoButton )

static

Since: 4.2

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

The standard buttons are added to the message box. defaultButton specifies the button used when \uicontrol 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 \uicontrol Esc was pressed instead, the \l{Default and Escape Keys} {escape button} is returned.

The message box is an \l{Qt::ApplicationModal} {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()

Needed for Qt 4 source compatibility

Definition at line 1853 of file qmessagebox.cpp.

References buttons(), defaultButton(), QObject::parent(), Question, showNewMessageBox(), text, and title.

Referenced by boo().

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◆ removeButton()

void QMessageBox::removeButton ( QAbstractButton * button )

Since: 4.2

Removes button from the button box without deleting it.

See also: addButton(), setStandardButtons()

Definition at line 970 of file qmessagebox.cpp.

References button, and d.

Referenced by addButton().

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◆ resizeEvent()

void QMessageBox::resizeEvent ( QResizeEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QDialog.

Definition at line 1531 of file qmessagebox.cpp.

References QDialog::resizeEvent().

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◆ setCheckBox()

void QMessageBox::setCheckBox ( QCheckBox * cb )

Since: 5.2

Sets the checkbox cb on the message dialog. The message box takes ownership of the checkbox. The argument cb can be \nullptr to remove an existing checkbox from the message box.

See also: checkBox()

Definition at line 1232 of file qmessagebox.cpp.

References cb, d, QWidget::layout(), QSizePolicy::MinimumExpanding, QLayout::removeWidget(), and sp.

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◆ setDefaultButton() [1/2]

void QMessageBox::setDefaultButton ( QPushButton * button )

Since: 4.2

Sets the message box's \l{QPushButton::setDefault()}{default button} to button.

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

Definition at line 1200 of file qmessagebox.cpp.

References button, d, QPushButton::setDefault(), and QWidget::setFocus().

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

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◆ setDefaultButton() [2/2]

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

Since: 4.3

Sets the message box's \l{QPushButton::setDefault()}{default button} to button.

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

Definition at line 1218 of file qmessagebox.cpp.

References button, d, and setDefaultButton().

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◆ setEscapeButton() [1/2]

void QMessageBox::setEscapeButton ( QAbstractButton * button )

Since: 4.2

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

See also: addButton(), clickedButton()

Definition at line 1081 of file qmessagebox.cpp.

References button, and d.

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

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◆ setEscapeButton() [2/2]

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

Since: 4.3

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

See also: addButton(), clickedButton()

Definition at line 1096 of file qmessagebox.cpp.

References button, d, and setEscapeButton().

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◆ setIcon()

void QMessageBox::setIcon ( Icon icon )

Definition at line 1423 of file qmessagebox.cpp.

References d, icon, setIconPixmap(), and QMessageBoxPrivate::standardIcon().

Referenced by QMessageBox(), changeEvent(), and QWidgetPlatformMessageDialog::show().

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◆ setIconPixmap()

void QMessageBox::setIconPixmap ( const QPixmap & pixmap )

Definition at line 1449 of file qmessagebox.cpp.

References d, NoIcon, and pixmap.

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

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◆ setInformativeText()

void QMessageBox::setInformativeText ( const QString & text )

Definition at line 2702 of file qmessagebox.cpp.

References Qt::AlignLeft, Qt::AlignTop, d, QString::isEmpty(), qt_app_fonts_hash(), QObject::setObjectName(), QStyle::SH_MessageBox_TextInteractionFlags, QWidget::style(), and text.

Referenced by aboutQt(), and QWidgetPlatformMessageDialog::show().

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◆ setOption()

void QMessageBox::setOption	(	Option	option,
		bool	on = true )

Since: 6.6 Sets the given option to be enabled if on is true; otherwise, clears the given option.

Options (particularly the \l Option::DontUseNativeDialog option) should be set before showing the dialog.

Setting options while the dialog is visible is not guaranteed to have an immediate effect on the dialog.

Setting options after changing other properties may cause these values to have no effect.

See also: options, testOption()

Definition at line 1285 of file qmessagebox.cpp.

References options, and setOptions().

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◆ setOptions()

void QMessageBox::setOptions ( Options options )

Definition at line 1306 of file qmessagebox.cpp.

References d, and options.

Referenced by setOption().

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◆ setStandardButtons()

void QMessageBox::setStandardButtons ( StandardButtons buttons )

Definition at line 993 of file qmessagebox.cpp.

References buttons(), and d.

Referenced by QMessageBox(), and QWidgetPlatformMessageDialog::show().

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◆ setText()

void QMessageBox::setText ( const QString & text )

Definition at line 1363 of file qmessagebox.cpp.

References Qt::AutoText, d, Qt::mightBeRichText(), Qt::RichText, and text.

Referenced by aboutQt(), and QWidgetPlatformMessageDialog::show().

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◆ setTextFormat()

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

Definition at line 1474 of file qmessagebox.cpp.

References Qt::AutoText, d, Qt::mightBeRichText(), and Qt::RichText.

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◆ setTextInteractionFlags()

void QMessageBox::setTextInteractionFlags ( Qt::TextInteractionFlags flags )

Definition at line 1503 of file qmessagebox.cpp.

References d.

◆ setWindowModality()

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

Since: 4.2

This function shadows QWidget::setWindowModality().

Sets the modality of the message box to windowModality.

On \macos, 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 2762 of file qmessagebox.cpp.

References defaultButton(), Qt::Dialog, QWidget::parentWidget(), setDefaultButton(), QWidget::setParent(), QWidget::setWindowModality(), Qt::Sheet, Qt::WindowModal, and QWidget::windowModality.

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◆ setWindowTitle()

void QMessageBox::setWindowTitle ( const QString & title )

Since: 4.2

This function shadows QWidget::setWindowTitle().

Sets the title of the message box to title. On \macos, the window title is ignored (as required by the \macos Guidelines).

Definition at line 2740 of file qmessagebox.cpp.

References Q_UNUSED, QWidget::setWindowTitle(), and title.

Referenced by aboutQt(), and QWidgetPlatformMessageDialog::show().

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◆ showEvent()

void QMessageBox::showEvent ( QShowEvent * event )

overrideprotectedvirtual

\reimp

Reimplemented from QDialog.

Definition at line 1734 of file qmessagebox.cpp.

References d, and QDialog::showEvent().

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◆ standardButton()

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

Since: 4.2

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

See also: button(), standardButtons()

Definition at line 1021 of file qmessagebox.cpp.

References button, and d.

Referenced by addButton(), and showNewMessageBox().

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◆ standardButtons()

QMessageBox::StandardButtons QMessageBox::standardButtons ( ) const

Definition at line 1007 of file qmessagebox.cpp.

References d.

◆ testOption()

bool QMessageBox::testOption ( Option option ) const

Since: 6.6

Returns true if the given option is enabled; otherwise, returns false.

See also: options, setOption()

Definition at line 1300 of file qmessagebox.cpp.

References d.

◆ text()

QString QMessageBox::text ( ) const

Definition at line 1357 of file qmessagebox.cpp.

References d.

◆ textFormat()

Qt::TextFormat QMessageBox::textFormat ( ) const

Definition at line 1468 of file qmessagebox.cpp.

References d.

◆ textInteractionFlags()

Qt::TextInteractionFlags QMessageBox::textInteractionFlags ( ) const

Definition at line 1497 of file qmessagebox.cpp.

References d.

◆ warning()

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

static

Since: 4.2

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

The standard buttons are added to the message box. defaultButton specifies the button used when \uicontrol 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 \uicontrol Esc was pressed instead, the \l{Default and Escape Keys} {escape button} is returned.

The message box is an \l{Qt::ApplicationModal} {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 1885 of file qmessagebox.cpp.

References buttons(), defaultButton(), QObject::parent(), showNewMessageBox(), text, title, and Warning.

Referenced by QPrintPropertiesDialog::accept(), boo(), src_gui_kernel_qguiapplication::MyMainWidget::commitData(), QFileDialogPrivate::deleteCurrent(), QFileDialogPrivate::goToDirectory(), QPrintDialogPrivate::openWindowsPrintDialogModally(), MainWindow::saveFile(), and Viewer::saveImage().

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Property Documentation

◆ icon

QMessageBox::icon

readwrite

the message box's icon

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

\list

QMessageBox::NoIcon
QMessageBox::Question
QMessageBox::Information
QMessageBox::Warning
QMessageBox::Critical \endlist

The default is QMessageBox::NoIcon.

The pixmap used to display the actual icon depends on the current \l{QWidget::style()} {GUI style}. You can also set a custom pixmap for the icon by setting the \l{QMessageBox::iconPixmap} {icon pixmap} property.

See also: iconPixmap

Definition at line 25 of file qmessagebox.h.

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

◆ iconPixmap

QMessageBox::iconPixmap

readwrite

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 26 of file qmessagebox.h.

◆ informativeText

QMessageBox::informativeText

readwrite

the informative text that provides a fuller description for the message

Since: 4.2

Informative text can be used to expand upon the text() to give more information to the user, for example describing the consequences of the situation, or suggestion alternative solutions.

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

By default, this property contains an empty string.

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

Definition at line 32 of file qmessagebox.h.

◆ options

QMessageBox::options

readwrite

Options that affect the look and feel of the dialog.

Since: 6.6

By default, these options are disabled.

The option \l Option::DontUseNativeDialog should be set before changing dialog properties or showing the dialog.

Setting options while the dialog is visible is not guaranteed to have an immediate effect on the dialog.

Setting options after changing other properties may cause these values to have no effect.

See also: setOption(), testOption()

Definition at line 35 of file qmessagebox.h.

Referenced by setOption(), and setOptions().

◆ standardButtons

QMessageBox::standardButtons

readwrite

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 28 of file qmessagebox.h.

◆ text

QMessageBox::text

readwrite

the message box text to be displayed.

The text should be a brief sentence or phrase that describes the situation, ideally formulated as a neutral statement, or a call-to-action question.

The text will be interpreted either as a plain text or as rich text, depending on the text format setting (\l 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 24 of file qmessagebox.h.

Referenced by QMessageBox(), about(), addButton(), critical(), information(), question(), setInformativeText(), setText(), and warning().

◆ textFormat

QMessageBox::textFormat

readwrite

the format of the text displayed by the message box

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

The default format is Qt::AutoText.

See also: setText()

Definition at line 27 of file qmessagebox.h.

◆ textInteractionFlags

QMessageBox::textInteractionFlags

readwrite

Since: 5.1

Specifies how the label of the message box should interact with user input.

The default value depends on the style.

See also: QStyle::SH_MessageBox_TextInteractionFlags

Definition at line 33 of file qmessagebox.h.

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

qtbase/src/widgets/dialogs/qmessagebox.h (9af3a6c146a408b42540e9aefbe8feca096dcad3)
qtbase/src/widgets/dialogs/qmessagebox.cpp (b30121041c07b1b8613eaf624c9aa55a51001aef)

Public Types

Public Slots

Signals

Public Member Functions

Static Public Member Functions

Protected Member Functions

Properties

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ ButtonRole

◆ Icon

◆ Option

◆ StandardButton

Constructor & Destructor Documentation

◆ QMessageBox() [1/2]

◆ QMessageBox() [2/2]

◆ ~QMessageBox()

Member Function Documentation

◆ about()

◆ aboutQt()

◆ addButton() [1/3]

◆ addButton() [2/3]

◆ addButton() [3/3]

◆ button()

◆ buttonClicked

◆ buttonRole()

◆ buttons()

◆ changeEvent()

◆ checkBox()

◆ clickedButton()

◆ closeEvent()

◆ critical()

◆ defaultButton()

◆ escapeButton()

◆ event()

◆ icon()

◆ iconPixmap()

◆ information()

◆ informativeText()

◆ keyPressEvent()

◆ open [1/2]

◆ open() [2/2]

◆ options()

◆ question()

Needed for Qt 4 source compatibility

◆ removeButton()

◆ resizeEvent()

◆ setCheckBox()

◆ setDefaultButton() [1/2]

◆ setDefaultButton() [2/2]

◆ setEscapeButton() [1/2]

◆ setEscapeButton() [2/2]

◆ setIcon()

◆ setIconPixmap()

◆ setInformativeText()

◆ setOption()

◆ setOptions()

◆ setStandardButtons()

◆ setText()

◆ setTextFormat()

◆ setTextInteractionFlags()

◆ setWindowModality()

◆ setWindowTitle()

◆ showEvent()

◆ standardButton()

◆ standardButtons()

◆ testOption()

◆ text()

◆ textFormat()

◆ textInteractionFlags()

◆ warning()

Property Documentation

◆ icon

◆ iconPixmap

◆ informativeText

◆ options

◆ standardButtons

◆ text

◆ textFormat