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

Inheritance diagram for QMessageBox:

Public Typedefs
using	StandardButtons = QFlags< StandardButton >

Public Typedefs inherited from QWidget
using	RenderFlags = QFlags< RenderFlag >

Public Types
enum	ButtonRole

enum	Icon

enum	StandardButton

Public Types inherited from QDialog
enum	DialogCode

Public Types inherited from QWidget
enum	RenderFlag

Public Types inherited from QPaintDevice
enum	PaintDeviceMetric

Public Signals
void	buttonClicked (QAbstractButton *button)

Public Signals inherited from QDialog
void	accepted ()

void	finished (int result)

void	rejected ()

Public Signals inherited from QWidget
void	customContextMenuRequested (const QPoint &pos)

void	windowIconChanged (const QIcon &icon)

void	windowIconTextChanged (const QString &iconText)

void	windowTitleChanged (const QString &title)

Public Signals inherited from QObject
void	destroyed (QObject *obj=nullptr)

void	objectNameChanged (const QString &objectName)

Public Slots
virtual void	open ()

Public Slots inherited from QDialog
virtual void	accept ()

virtual void	done (int result)

virtual int	exec ()

virtual void	open ()

virtual void	reject ()

void	showExtension (bool showExt)

Public Slots inherited from QWidget
bool	close ()

void	hide ()

void	lower ()

void	raise ()

void	repaint ()

void	setDisabled (bool disable)

void	setEnabled (bool enable)

void	setFocus ()

void	setHidden (bool hidden)

void	setStyleSheet (const QString &styleSheet)

virtual void	setVisible (bool visible)

void	setWindowModified (bool modified)

void	setWindowTitle (const QString &title)

void	show ()

void	showFullScreen ()

void	showMaximized ()

void	showMinimized ()

void	showNormal ()

void	update ()

Public Slots inherited from QObject
void	deleteLater ()

Public Methods
	QMessageBox (const QString &title, const QString &text, Icon icon, int button0, int button1, int button2, QWidget *parent=nullptr, Qt::WindowFlags flags=Qt::Dialog\|Qt::MSWindowsFixedSizeDialogHint)

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

	QMessageBox (QWidget *parent=nullptr)

	~QMessageBox ()

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

void	addButton (QAbstractButton *button, ButtonRole role)

QPushButton *	addButton (StandardButton button)

QAbstractButton *	button (StandardButton which) const

ButtonRole	buttonRole (QAbstractButton *button) const

QList< QAbstractButton * >	buttons () const

QString	buttonText (int button) const

QCheckBox *	checkBox () const

QAbstractButton *	clickedButton () const

QPushButton *	defaultButton () const

QString	detailedText () const

QAbstractButton *	escapeButton () const

int	exec ()

Icon	icon () const

QPixmap	iconPixmap () const

QString	informativeText () const

void	open (QObject *receiver, const QString &member)

void	removeButton (QAbstractButton *button)

void	setButtonText (int button, const QString &text)

void	setCheckBox (QCheckBox *cb)

void	setDefaultButton (QPushButton *button)

void	setDefaultButton (StandardButton button)

void	setDetailedText (const QString &text)

void	setEscapeButton (QAbstractButton *button)

void	setEscapeButton (StandardButton button)

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

void	setWindowModality (Qt::WindowModality windowModality)

void	setWindowTitle (const QString &title)

StandardButton	standardButton (QAbstractButton *button) const

StandardButtons	standardButtons () const

QString	text () const

Qt::TextFormat	textFormat () const

Qt::TextInteractionFlags	textInteractionFlags () const

Public Methods inherited from QDialog
	QDialog (QWidget *parent=nullptr, Qt::WindowFlags flags=Qt::EmptyFlag)

	~QDialog ()

QWidget *	extension () const

bool	isSizeGripEnabled () const

QSize	minimumSizeHint () const override

Qt::Orientation	orientation () const

int	result () const

void	setExtension (QWidget *extension)

void	setModal (bool modal)

void	setOrientation (Qt::Orientation orientation)

void	setResult (int result)

void	setSizeGripEnabled (bool enabled)

void	setVisible (bool visible) override

QSize	sizeHint () const override

Public Methods inherited from QWidget
	QWidget (QWidget *parent=nullptr, Qt::WindowFlags flags=Qt::EmptyFlag)

	~QWidget ()

bool	acceptDrops () const

QString	accessibleDescription () const

QString	accessibleName () const

QList< QAction * >	actions () const

void	activateWindow ()

void	addAction (QAction *action)

void	addActions (const QList< QAction * > &actions)

void	adjustSize ()

bool	autoFillBackground () const

QPalette::ColorRole	backgroundRole () const

QBackingStore *	backingStore () const

QSize	baseSize () const

QWidget *	childAt (const QPoint &position) const

QWidget *	childAt (int x, int y) const

QRect	childrenRect () const

QRegion	childrenRegion () const

void	clearFocus ()

void	clearMask ()

QMargins	contentsMargins () const

QRect	contentsRect () const

Qt::ContextMenuPolicy	contextMenuPolicy () const

QCursor	cursor () const

WId	effectiveWinId () const

void	ensurePolished () const

Qt::FocusPolicy	focusPolicy () const

QWidget *	focusProxy () const

QWidget *	focusWidget () const

const QFont &	font () const

QFontInfo	fontInfo () const

QFontMetrics	fontMetrics () const

QPalette::ColorRole	foregroundRole () const

QRect	frameGeometry () const

QSize	frameSize () const

const QRect &	geometry () const

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

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

void	grabGesture (Qt::GestureType gestureType, Qt::GestureFlags flags=Qt::GestureFlags ())

void	grabKeyboard ()

void	grabMouse ()

void	grabMouse (const QCursor &cursor)

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

QGraphicsEffect *	graphicsEffect () const

QGraphicsProxyWidget *	graphicsProxyWidget () const

bool	hasEditFocus () const

bool	hasFocus () const

virtual bool	hasHeightForWidth () const

bool	hasMouseTracking () const

int	height () const

virtual int	heightForWidth (int width) const

Qt::InputMethodHints	inputMethodHints () const

virtual QVariant	inputMethodQuery (Qt::InputMethodQuery query) const

void	insertAction (QAction before, QAction action)

void	insertActions (QAction before, QList< QAction > actions)

bool	isActiveWindow () const

bool	isAncestorOf (const QWidget *child) const

bool	isEnabled () const

bool	isEnabledTo (const QWidget *parent) const

bool	isEnabledToTLW () const

bool	isFullScreen () const

bool	isHidden () const

bool	isMaximized () const

bool	isMinimized () const

bool	isModal () const

bool	isTopLevel () const

bool	isVisible () const

bool	isVisibleTo (const QWidget *parent) const

bool	isWindow () const

bool	isWindowModified () const

QLayout *	layout () const

Qt::LayoutDirection	layoutDirection () const

QLocale	locale () const

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

QPoint	mapFromGlobal (const QPoint &pos) const

QPoint	mapFromParent (const QPoint &pos) const

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

QPoint	mapToGlobal (const QPoint &pos) const

QPoint	mapToParent (const QPoint &pos) const

QRegion	mask () const

int	maximumHeight () const

QSize	maximumSize () const

int	maximumWidth () const

int	minimumHeight () const

QSize	minimumSize () const

int	minimumWidth () const

void	move (const QPoint &point)

void	move (int x, int y)

QWidget *	nativeParentWidget () const

QWidget *	nextInFocusChain () const

QRect	normalGeometry () const

void	overrideWindowFlags (Qt::WindowFlags flags)

QPaintEngine *	paintEngine () const override

const QPalette &	palette () const

QWidget *	parentWidget () const

QPoint	pos () const

QWidget *	previousInFocusChain () const

QRect	rect () const

void	releaseKeyboard ()

void	releaseMouse ()

void	releaseShortcut (int id)

void	removeAction (QAction *action)

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))

void	repaint (const QRect &rect)

void	repaint (const QRegion &region)

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

void	resize (const QSize &size)

void	resize (int w, int h)

bool	restoreGeometry (const QByteArray &geometry)

QByteArray	saveGeometry () const

void	scroll (int dx, int dy)

void	scroll (int dx, int dy, const QRect &rect)

void	setAcceptDrops (bool on)

void	setAccessibleDescription (const QString &description)

void	setAccessibleName (const QString &name)

void	setAttribute (Qt::WidgetAttribute attribute, bool enable=true)

void	setAutoFillBackground (bool enable)

void	setBackgroundRole (QPalette::ColorRole role)

void	setBaseSize (const QSize &size)

void	setBaseSize (int basew, int baseh)

void	setContentsMargins (const QMargins &margins)

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

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	setCursor (const QCursor &cursor)

void	setEditFocus (bool enable)

void	setFixedHeight (int h)

void	setFixedSize (const QSize &size)

void	setFixedSize (int w, int h)

void	setFixedWidth (int w)

void	setFocus (Qt::FocusReason reason)

void	setFocusPolicy (Qt::FocusPolicy policy)

void	setFocusProxy (QWidget *widget)

void	setFont (const QFont &font)

void	setForegroundRole (QPalette::ColorRole role)

void	setGeometry (const QRect &rect)

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

void	setGraphicsEffect (QGraphicsEffect *effect)

void	setInputMethodHints (Qt::InputMethodHints hints)

void	setLayout (QLayout *layout)

void	setLayoutDirection (Qt::LayoutDirection direction)

void	setLocale (const QLocale &locale)

void	setMask (const QBitmap &bitmap)

void	setMask (const QRegion &region)

void	setMaximumHeight (int maxh)

void	setMaximumSize (const QSize &size)

void	setMaximumSize (int maxw, int maxh)

void	setMaximumWidth (int maxw)

void	setMinimumHeight (int minh)

void	setMinimumSize (const QSize &size)

void	setMinimumSize (int minw, int minh)

void	setMinimumWidth (int minw)

void	setMouseTracking (bool enable)

void	setPalette (const QPalette &palette)

void	setParent (QWidget *parent)

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

void	setShortcutAutoRepeat (int id, bool enable=true)

void	setShortcutEnabled (int id, bool enable=true)

void	setSizeIncrement (const QSize &size)

void	setSizeIncrement (int w, int h)

void	setSizePolicy (QSizePolicy policy)

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

void	setStatusTip (const QString &data)

void	setStyle (QStyle *style)

void	setToolTip (const QString &data)

void	setToolTipDuration (int msec)

void	setUpdatesEnabled (bool enable)

void	setWhatsThis (const QString &str)

void	setWindowFilePath (const QString &filePath)

void	setWindowFlags (Qt::WindowFlags flags)

void	setWindowIcon (const QIcon &icon)

void	setWindowModality (Qt::WindowModality windowModality)

void	setWindowOpacity (qreal level)

void	setWindowRole (const QString &role)

void	setWindowState (Qt::WindowStates windowState)

QSize	size () const

QSize	sizeIncrement () const

QSizePolicy	sizePolicy () const

void	stackUnder (QWidget *widget)

QString	statusTip () const

QStyle *	style () const

QString	styleSheet () const

bool	testAttribute (Qt::WidgetAttribute attribute) const

QString	toolTip () const

int	toolTipDuration () const

QWidget *	topLevelWidget () const

bool	underMouse () const

void	ungrabGesture (Qt::GestureType gestureType)

void	unsetCursor ()

void	unsetLayoutDirection ()

void	unsetLocale ()

void	update (const QRect &rect)

void	update (const QRegion &region)

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

void	updateGeometry ()

bool	updatesEnabled () const

QRegion	visibleRegion () const

QString	whatsThis () const

int	width () const

QWidget *	window () const

QString	windowFilePath () const

Qt::WindowFlags	windowFlags () const

QWindow *	windowHandle () const

QIcon	windowIcon () const

Qt::WindowModality	windowModality () const

qreal	windowOpacity () const

QString	windowRole () const

Qt::WindowStates	windowState () const

QString	windowTitle () const

Qt::WindowType	windowType () const

WId	winId () const

int	x () const

int	y () const

Public Methods inherited from QObject
	QObject (QObject *parent=nullptr)

	~QObject ()

bool	blockSignals (bool block)

const QList< QObject * > &	children () const

bool	connect (const QObject *sender, const QString &signalMethod, const QString &location, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	connect (const QObject *sender, const QString &signalMethod, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	disconnect (const QObject *receiver, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod, const QString &location, const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod=QString (), const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QString >	dynamicPropertyNames () const

virtual bool	event (QEvent *event)

virtual bool	eventFilter (QObject watched, QEvent event)

template<typename T >
T	findChild (const QString &childName=QString ()) const

template<class T >
QList< T >	findChildren (const QRegularExpression &regExp, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

template<class T >
QList< T >	findChildren (const QString &childName=QString (), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

bool	inherits (const QString &className) const

void	installEventFilter (QObject *filterObj)

bool	isWidgetType () const

bool	isWindowType () const

void	killTimer (int id)

const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

QString	objectName () const

QObject *	parent () const

template<class T = QVariant>
T	property (const QString &name) const

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const QString &name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)

QThread *	thread () const

Public Methods inherited from QPaintDevice
virtual	~QPaintDevice ()

int	colorCount () const

int	depth () const

int	devicePixelRatio () const

qreal	devicePixelRatioF () const

int	height () const

int	heightMM () const

int	logicalDpiX () const

int	logicalDpiY () const

bool	paintingActive () const

int	physicalDpiX () const

int	physicalDpiY () const

int	width () const

int	widthMM () const

Static Public Methods
static void	about (QWidget *parent, const QString &title, const QString &text)

static void	aboutCs (QWidget *parent, const QString &title=QString ())

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)

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

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

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)

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

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

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)

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

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

static QPixmap	standardIcon (Icon icon)

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)

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

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

Static Public Methods inherited from QWidget
static QWidget *	createWindowContainer (QWindow window, QWidget parent=nullptr, Qt::WindowFlags flags=Qt::EmptyFlag)

static QWidget *	find (WId id)

static QWidget *	keyboardGrabber ()

static QWidget *	mouseGrabber ()

static void	setTabOrder (QWidget firstWidget, QWidget secondWidget)

Static Public Methods inherited from QObject
static bool	connect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

static bool	connect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection, const QString &location=QString ())

static bool	connect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...), Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotLambda, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, std::nullptr_t, const QObject receiver, std::nullptr_t)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...))

template<class Sender , class SignalClass , class... SignalArgs, class Receiver >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, std::nullptr_t slotMethod=nullptr)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotMethod)

static QMetaObject &	staticMetaObject ()

static QString	tr (const char text, const char comment=nullptr, std::optional< int > numArg=std::optional< int >())

Protected Methods
void	changeEvent (QEvent *event) override

void	closeEvent (QCloseEvent *event) override

bool	event (QEvent *event) override

void	keyPressEvent (QKeyEvent *event) override

void	resizeEvent (QResizeEvent *event) override

void	showEvent (QShowEvent *event) override

Protected Methods inherited from QDialog
void	contextMenuEvent (QContextMenuEvent *event) override

bool	eventFilter (QObject object, QEvent event) override

Protected Methods inherited from QWidget
virtual void	actionEvent (QActionEvent *event)

void	create (WId window=0, bool initializeWindow=true, bool destroyOldWindow=true)

void	destroy (bool destroyWindow=true, bool destroySubWindows=true)

virtual void	dragEnterEvent (QDragEnterEvent *event)

virtual void	dragLeaveEvent (QDragLeaveEvent *event)

virtual void	dragMoveEvent (QDragMoveEvent *event)

virtual void	dropEvent (QDropEvent *event)

virtual void	enterEvent (QEvent *event)

bool	event (QEvent *event) override

virtual void	focusInEvent (QFocusEvent *event)

bool	focusNextChild ()

virtual bool	focusNextPrevChild (bool next)

virtual void	focusOutEvent (QFocusEvent *event)

bool	focusPreviousChild ()

virtual void	hideEvent (QHideEvent *event)

void	initPainter (QPainter *painter) const override

virtual void	inputMethodEvent (QInputMethodEvent *event)

virtual void	keyReleaseEvent (QKeyEvent *event)

virtual void	leaveEvent (QEvent *event)

int	metric (PaintDeviceMetric metric) const override

virtual void	mouseDoubleClickEvent (QMouseEvent *event)

virtual void	mouseMoveEvent (QMouseEvent *event)

virtual void	mousePressEvent (QMouseEvent *event)

virtual void	mouseReleaseEvent (QMouseEvent *event)

virtual void	moveEvent (QMoveEvent *event)

virtual bool	nativeEvent (const QByteArray &eventType, void message, long result)

virtual void	paintEvent (QPaintEvent *event)

virtual void	tabletEvent (QTabletEvent *event)

virtual void	wheelEvent (QWheelEvent *event)

Protected Methods inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signalMethod) const

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signalMethod) const

bool	isSignalConnected (const QMetaMethod &signalMethod) const

int	receivers (const QString &signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Protected Methods inherited from QPaintDevice
	QPaintDevice ()

Properties
	detailedText

	icon

	iconPixmap

	informativeText

	standardButtons

	text

	textFormat

Properties inherited from QDialog
	modal

	sizeGripEnabled

Properties inherited from QWidget
	acceptDrops

	accessibleDescription

	accessibleName

	autoFillBackground

	baseSize

	childrenRect

	childrenRegion

	contextMenuPolicy

	cursor

	enabled

	focus

	focusPolicy

	font

	frameGeometry

	frameSize

	fullScreen

	geometry

	height

	inputMethodHints

	isActiveWindow

	layoutDirection

	locale

	maximized

	maximumHeight

	maximumSize

	maximumWidth

	minimized

	minimumHeight

	minimumSize

	minimumSizeHint

	minimumWidth

	modal

	mouseTracking

	normalGeometry

	palette

	pos

	rect

	size

	sizeHint

	sizeIncrement

	sizePolicy

	statusTip

	styleSheet

	toolTip

	updatesEnabled

	visible

	whatsThis

	width

	windowFilePath

	windowFlags

	windowIcon

	windowIconText

	windowModality

	windowModified

	windowOpacity

	windowTitle

	x

	y

Properties inherited from QObject
	objectName

Additional Inherited Members
Protected Slots inherited from QWidget
void	updateMicroFocus ()

Related Functions inherited from QWidget
	QWidgetList

	WId

Related Functions inherited from QObject
T	qobject_cast (QObject *object)

	QObjectList

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.

You can use QMessageBox in two different ways, by calling a static method or creating an instance. Calling one of the static methods is simpler but it is less flexible than using an instance. Using the instance API is recommended.

Using the Constructor API

To use this approach construct an instance of QMessageBox and set the desired properties. Then 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 is to ask the user what they want to do. You should display the question by setting the informative text property and use the standard buttons property to display only relevant buttons. The buttons are specified by combining values from StandardButtons using the bitwise OR operator. The display order for the buttons is platform dependent.

On Windows Save is displayed to the left of Cancel, whereas on Mac OS X the order is reversed. It is advisable to mark one of your standard buttons as the default.

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 returnValue = msgBox.exec();

This is the approach recommended in the 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 (returnValue) {
   case QMessageBox::Save:
       // Save was clicked
       break;
 
   case QMessageBox::Discard:
       // Do not Save was clicked
       break;
 
   case QMessageBox::Cancel:
       // Cancel was clicked
       break;
 
   default:
       // should never be reached
       break;
}

Examples

The first example adds an additional button which the user can press for detailed information. The second example shows the detailed information in the same window.

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.

Static Methods

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 retval = QMessageBox::warning(this, tr("My Application"),
      tr("This document has been modified.\nDo you want to save your changes?"),
      QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel, QMessageBox::Save);

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 ButtonRole 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().

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 No role, it is the button activated when Esc is pressed.

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

See also: QDialogButtonBox

Member Typedef Documentation

QMessageBox::StandardButtons

Typedef for QFlags<QMessageBox::StandardButton> which contains an OR combination of StandardButton values.

Refer to QMessageBox::StandardButton for the enum documentation.

Member Enumeration Documentation

enum QMessageBox::ButtonRole

This enum describes the roles that can be used to describe buttons in the button box. Combinations of these roles are as flags used to describe different aspects of their behavior.

Constant	Value	Description
`QMessageBox::InvalidRole`	`-1`	The button is invalid.
`QMessageBox::AcceptRole`	`0`	Clicking the button causes the dialog to be accepted (e.g. OK).
`QMessageBox::RejectRole`	`1`	Clicking the button causes the dialog to be rejected (e.g. Cancel).
`QMessageBox::DestructiveRole`	`2`	Clicking the button causes a destructive change (e.g. for Discarding Changes) and closes the dialog.
`QMessageBox::ActionRole`	`3`	Clicking the button causes changes to the elements within the dialog.
`QMessageBox::HelpRole`	`4`	The button can be clicked to request help.
`QMessageBox::YesRole`	`5`	The button is a "Yes"-like button.
`QMessageBox::NoRole`	`6`	The button is a "No"-like button.
`QMessageBox::ResetRole`	`7`	The button resets the dialog's fields to default values.
`QMessageBox::ApplyRole`	`8`	The button applies current changes.

See also: StandardButton

enum QMessageBox::Icon

This enum has the following values:

Constant	Value	Description
`QMessageBox::NoIcon`	`0`	Message box does not have any icon.
`QMessageBox::Information`	`1`	Icon indicates the message is nothing out of the ordinary.
`QMessageBox::Warning`	`2`	Icon indicates the message is a warning, but can be dealt with.
`QMessageBox::Critical`	`3`	Icon indicates the message represents a critical problem.
`QMessageBox::Question`	`4`	Icon indicates the message is asking a question.

enum QMessageBox::StandardButton

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

Constant	Value	Description
`QMessageBox::NoButton`	`0x00000000`	Invalid button.
`QMessageBox::Ok`	`0x00000400`	"OK" button defined with the AcceptRole.
`QMessageBox::Save`	`0x00000800`	"Save" button defined with the AcceptRole.
`QMessageBox::SaveAll`	`0x00001000`	"Save All" button defined with the AcceptRole.
`QMessageBox::Open`	`0x00002000`	"Open" button defined with the AcceptRole.
`QMessageBox::Yes`	`0x00004000`	"Yes" button defined with the YesRole.
`QMessageBox::YesToAll`	`0x00008000`	"Yes to All" button defined with the YesRole.
`QMessageBox::No`	`0x00010000`	"No" button defined with the NoRole.
`QMessageBox::NoToAll`	`0x00020000`	"No to All" button defined with the NoRole.
`QMessageBox::Abort`	`0x00040000`	"Abort" button defined with the RejectRole.
`QMessageBox::Retry`	`0x00080000`	"Retry" button defined with the AcceptRole.
`QMessageBox::Ignore`	`0x00100000`	"Ignore" button defined with the AcceptRole.
`QMessageBox::Close`	`0x00200000`	"Close" button defined with the RejectRole.
`QMessageBox::Cancel`	`0x00400000`	"Cancel" button defined with the RejectRole.
`QMessageBox::Discard`	`0x00800000`	"Discard" or "Do not Save" button, depending on the platform, defined with the DestructiveRole.
`QMessageBox::Help`	`0x01000000`	"Help" button defined with the HelpRole.
`QMessageBox::Apply`	`0x02000000`	"Apply" button defined with the ApplyRole.
`QMessageBox::Reset`	`0x04000000`	"Reset" button defined with the ResetRole.
`QMessageBox::RestoreDefaults`	`0x08000000`	"Restore Defaults" button defined with the ResetRole.

The following enum values are obsolete.

Constant	Value	Description
`QMessageBox::YesAll`	`YesToAll`	Use YesToAll instead.
`QMessageBox::NoAll`	`NoToAll`	Use NoToAll instead.
`QMessageBox::Default`	`0x00000100`	Use the `defaultButton` argument for information(), warning()or call setDefaultButton().
`QMessageBox::Escape`	`0x00000200`	Call setEscapeButton() instead.
`QMessageBox::FlagMask`	`0x00000300`
`QMessageBox::ButtonMask`	`~FlagMask`

See also: ButtonRole, standardButtons

Constructor & Destructor Documentation

QMessageBox::QMessageBox ( QWidget * parent = nullptr )

explicit

Constructs a message box with no text and no buttons using the given parent.

On OS X to display a message box as a Qt::Sheet of the parent, set the message box window modality to Qt::WindowModal or use open(). Otherwise, the message box will be a standard dialog.

QMessageBox::QMessageBox	(	Icon	icon,
		const QString &	title,
		const QString &	text,
		StandardButtons	buttons = `NoButton`,
		QWidget *	parent = `nullptr`,
		Qt::WindowFlags	flags = `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 flags arguments are passed to the QDialog constructor. The message box is an application modal dialog box.

On Mac OS X if the given parent is not a nullptr and the message box should appear as a Qt::Sheet of this parent, set the message box window modality to Qt::WindowModal. Otherwise, the message box will be a standard dialog.

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

QMessageBox::~QMessageBox ( )

Destroys the message box.

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

deprecated

Deprecated:: Use QMessageBox::QMessageBox() which uses the StandardButtons enum.

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

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

Method Documentation

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

static

Displays a simple about box with title and text. The about box's parent is parent. The about box has a single button labeled OK. On OS X the about box is displayed as a modeless window. On other platforms it is application modal.

This method looks for a suitable icon in four locations as listed below.

Prefers parent->icon() if this 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.

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

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

static

Displays a simple message box about CopperSpice, with the given title and centered over parent if is not a nullptr. The message includes the version number of CopperSpice being used by the application.

This message box is useful for inclusion in the Help menu of your application.

QApplication provides this functionality as a slot. On OS X the about box is displayed as a modeless window. On other platforms it is application modal.

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 a pointer to the new button.

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

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

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

QPushButton * QMessageBox::addButton ( StandardButton button )

Adds a standard button to the message box if it is valid to do so. Returns a pointer to the push button.

See also: setStandardButtons()

QAbstractButton * QMessageBox::button ( StandardButton which ) const

Returns a pointer corresponding to the standard button which or a nullptr if the standard button does not exist in this message box.

See also: standardButtons, standardButton()

void QMessageBox::buttonClicked ( QAbstractButton * button )

signal

This signal is emitted whenever a button is clicked inside the QMessageBox. The button which was clicked is passed as the button argument.

ButtonRole QMessageBox::buttonRole ( QAbstractButton * button ) const

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

See also: buttons(), addButton()

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

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

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

QString QMessageBox::buttonText ( int button ) const

deprecated

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

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

void QMessageBox::changeEvent ( QEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::changeEvent()

QCheckBox * QMessageBox::checkBox ( ) const

Returns a pointer to the QCheckBox shown on the dialog. This is nullptr if no checkbox is set.

QAbstractButton * QMessageBox::clickedButton ( ) const

Returns the button that was clicked by the user or a nullptr if the user hit the Esc key and no escape button was set. If exec() has not been called yet returns nullptr.

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

See also: standardButton(), button()

void QMessageBox::closeEvent ( QCloseEvent * event )

overrideprotectedvirtual

Reimplemented from QDialog::closeEvent()

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`
	)

deprecatedstatic

Deprecated:: Use QMessageBox::critical() which uses the StandardButtons enum.

Displays a critical error message box with the given title and text, as well as one, two, or three buttons. Returns the number of the button that was clicked (0, 1 or 2).

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

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

deprecatedstatic

Deprecated:: Use QMessageBox::critical() which uses the StandardButtons enum.

Opens a critical message box with the given title and text. The dialog may have up to three buttons.

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

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.

The standard buttons are added to the message box. The defaultButton specifies the button used when Enter is pressed and must refer to a button which was listed 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 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()

QPushButton * QMessageBox::defaultButton ( ) const

Returns the button that should be the message box's default button. Returns a nullptr if no default button was set.

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

QString QMessageBox::detailedText ( ) const

Returns the value of the property.

QAbstractButton * QMessageBox::escapeButton ( ) const

Returns the button that is activated when escape is pressed. 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: setEscapeButton(), addButton()

bool QMessageBox::event ( QEvent * event )

overrideprotected

Reimplemented from QWidget::event()

int QMessageBox::exec ( )

Shows the message box as a modal dialog, blocking until the user closes it. Users can not 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.

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

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

See also: show(), result()

Icon QMessageBox::icon ( ) const

Returns the value of the property.

QPixmap QMessageBox::iconPixmap ( ) const

Returns the value of the property.

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`
	)

deprecatedstatic

Deprecated:: Use QMessageBox::information() which uses the StandardButtons enum.

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

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

deprecatedstatic

Deprecated:: Use QMessageBox::information() which uses the StandardButtons enum.

Opens an information message box with the given title and the text. The dialog may have up to three buttons.

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

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.

The standard buttons are added to the message box. The defaultButton specifies the button used when Enter is pressed and must refer to a button which was listed 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 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()

QString QMessageBox::informativeText ( ) const

Returns the value of the property.

void QMessageBox::keyPressEvent ( QKeyEvent * event )

overrideprotectedvirtual

Reimplemented from QDialog::keyPressEvent()

void QDialog::open ( )

usingslot

Shows the dialog as a window modal dialog, returning immediately.

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

void QMessageBox::open	(	QObject *	receiver,
		const QString &	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.

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`
	)

deprecatedstatic

Deprecated:: Use QMessageBox::question() which uses the StandardButtons enum.

Displays a question message box with the given title and text, as well as one, two or three buttons. Returns the index of the button that was clicked (0, 1 or 2).

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

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

deprecatedstatic

Deprecated:: Use QMessageBox::question() which uses the StandardButtons enum.

Opens a question message box with the given title and text. The dialog may have up to three buttons.

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

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

static

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. The 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 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()

void QMessageBox::removeButton ( QAbstractButton * button )

Removes button from the button box without deleting it.

See also: addButton(), setStandardButtons()

void QMessageBox::resizeEvent ( QResizeEvent * event )

overrideprotectedvirtual

Reimplemented from QDialog::resizeEvent()

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

deprecated

Deprecated:: Use addButton() instead.

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

void QMessageBox::setCheckBox ( QCheckBox * cb )

Sets the checkbox cb on the message dialog. The message box takes ownership of the checkbox. The given cb can be a nullptr which will remove an existing checkbox from the message box.

void QMessageBox::setDefaultButton ( QPushButton * button )

Sets the message box's default button to button.

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

void QMessageBox::setDefaultButton ( StandardButton button )

Sets the message box's default button to button.

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

void QMessageBox::setDetailedText ( const QString & text )

Sets the value of the property to text

void QMessageBox::setEscapeButton ( QAbstractButton * button )

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

See also: escapeButton(), addButton(), clickedButton()

void QMessageBox::setEscapeButton ( StandardButton button )

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

See also: addButton(), clickedButton()

void QMessageBox::setIcon ( QMessageBox::Icon icon )

Sets the value of the property to icon.

void QMessageBox::setIconPixmap ( const QPixmap & pixmap )

Sets the value of the property to pixmap.

void QMessageBox::setInformativeText ( const QString & text )

Sets the value of the property to text.

void QMessageBox::setStandardButtons ( StandardButtons buttons )

Sets the value of the property to buttons.

void QMessageBox::setText ( const QString & text )

Sets the value of the property to text.

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

Sets the value of the property to format.

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

Sets the value of the property to flags.

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

Sets the modality of the message box to windowModality.

On Mac OS X, if the modality is set to window modal 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.

void QMessageBox::setWindowTitle ( const QString & title )

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).

void QMessageBox::showEvent ( QShowEvent * event )

overrideprotectedvirtual

Reimplemented from QDialog::showEvent()

StandardButton QMessageBox::standardButton ( QAbstractButton * button ) const

Returns the standard button enum value corresponding to the given button, or NoButton if the given button is not a standard button.

See also: button(), standardButtons()

StandardButtons QMessageBox::standardButtons ( ) const

Returns the value of the property.

QPixmap QMessageBox::standardIcon ( Icon icon )

deprecatedstatic

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

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

QString QMessageBox::text ( ) const

Returns the value of the property.

Qt::TextFormat QMessageBox::textFormat ( ) const

Returns the value of the property.

Qt::TextInteractionFlags QMessageBox::textInteractionFlags ( ) const

Returns the value of the property.

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`
	)

deprecatedstatic

Deprecated:: Use QMessageBox::warning() which uses the StandardButtons enum.

Displays a warning message box with the given title and text, as well as one, two, or three buttons. Returns the number of the button that was clicked (0, 1, or 2).

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

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

deprecatedstatic

Deprecated:: Use QMessageBox::warning() which uses the StandardButtons enum.

Opens a warning message box with the given title and text. The dialog may have up to three buttons.

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

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.

The standard buttons are added to the message box. The 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 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()

Property Documentation

QMessageBox::detailedText

This property holds the text to be displayed in the details area. The text will be interpreted as a plain text. By default this property contains an empty string.

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

Properties	Class Methods
read	detailedText
write	setDetailedText

QMessageBox::icon

This property holds the message box's icon. 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.

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

QMessageBox::NoIcon
QMessageBox::Question
QMessageBox::Information
QMessageBox::Warning
QMessageBox::Critical

See also: iconPixmap

Properties	Class Methods
read	icon
write	setIcon

QMessageBox::iconPixmap

This property holds the current icon. By default this property is undefined. The icon currently used by the message box. It is often hard to draw one pixmap which looks appropriate in all GUI styles. You may want to supply a different pixmap for each platform.

See also: icon

Properties	Class Methods
read	iconPixmap
write	setIconPixmap

QMessageBox::informativeText

This property holds the informative text that provides a fuller description for the message. By default this property contains an empty string.

Informative 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.

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

Properties	Class Methods
read	informativeText
write	setInformativeText

QMessageBox::standardButtons

This property holds collection of standard buttons in the message box. By default this property contains no standard buttons. This property controls which standard buttons are used by the message box.

See also: addButton()

Properties	Class Methods
read	standardButtons
write	setStandardButtons

QMessageBox::text

This property holds the message box text to be displayed. The default value of this property is an empty string.

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, meaning the message box will try to auto detect the format of the text.

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

Properties	Class Methods
read	text
write	setText

QMessageBox::textFormat

This property holds the format of the text displayed by the message box. The default format is Qt::AutoText. The current text format used by the message box. See the Qt::TextFormat enum for an explanation of the possible options.

See also: setText()

Properties	Class Methods
read	textFormat
write	setTextFormat

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Detailed Description

Using the Constructor API

Examples

Rich Text and the Text Format Property

Severity Levels and the Icon and Pixmap Properties

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Member Typedef Documentation

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