Abstract base class of button widgets, providing functionality common to buttons. More...

Inheritance diagram for QAbstractButton:

Public Signals
void	clicked (bool checked=false)

void	pressed ()

void	released ()

void	toggled (bool checked)

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
void	animateClick (int msec=100)

void	click ()

void	setChecked (bool checked)

void	setIconSize (const QSize &size)

void	toggle ()

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
	QAbstractButton (QWidget *parent=nullptr)

	~QAbstractButton ()

bool	autoExclusive () const

bool	autoRepeat () const

int	autoRepeatDelay () const

int	autoRepeatInterval () const

QButtonGroup *	group () const

QIcon	icon () const

QSize	iconSize () const

bool	isCheckable () const

bool	isChecked () const

bool	isDown () const

void	setAutoExclusive (bool enable)

void	setAutoRepeat (bool enable)

void	setAutoRepeatDelay (int delay)

void	setAutoRepeatInterval (int interval)

void	setCheckable (bool enable)

void	setDown (bool enable)

void	setIcon (const QIcon &icon)

void	setShortcut (const QKeySequence &key)

void	setText (const QString &text)

QKeySequence	shortcut () const

QString	text () const

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

virtual QSize	minimumSizeHint () 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

virtual QSize	sizeHint () 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

Protected Methods
void	changeEvent (QEvent *event) override

virtual void	checkStateSet ()

bool	event (QEvent *event) override

void	focusInEvent (QFocusEvent *event) override

void	focusOutEvent (QFocusEvent *event) override

virtual bool	hitButton (const QPoint &pos) const

void	keyPressEvent (QKeyEvent *event) override

void	keyReleaseEvent (QKeyEvent *event) override

void	mouseMoveEvent (QMouseEvent *event) override

void	mousePressEvent (QMouseEvent *event) override

void	mouseReleaseEvent (QMouseEvent *event) override

virtual void	nextCheckState ()

void	paintEvent (QPaintEvent *event) override = 0

void	timerEvent (QTimerEvent *event) override

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

virtual void	closeEvent (QCloseEvent *event)

virtual void	contextMenuEvent (QContextMenuEvent *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

bool	focusNextChild ()

virtual bool	focusNextPrevChild (bool next)

bool	focusPreviousChild ()

virtual void	hideEvent (QHideEvent *event)

void	initPainter (QPainter *painter) const override

virtual void	inputMethodEvent (QInputMethodEvent *event)

virtual void	leaveEvent (QEvent *event)

int	metric (PaintDeviceMetric metric) const override

virtual void	mouseDoubleClickEvent (QMouseEvent *event)

virtual void	moveEvent (QMoveEvent *event)

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

virtual void	resizeEvent (QResizeEvent *event)

virtual void	showEvent (QShowEvent *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
	autoExclusive

	autoRepeat

	autoRepeatDelay

	autoRepeatInterval

	checkable

	checked

	down

	icon

	iconSize

	shortcut

	text

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

Friends
class	QButtonGroup

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

Public Types inherited from QWidget
enum	RenderFlag

Public Types inherited from QPaintDevice
enum	PaintDeviceMetric

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 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 QAbstractButton class is the abstract base class for all button widgets. Child classes will handle user actions and specify how the button is drawn. QAbstractButton provides support for push buttons and checkable buttons. Push buttons are implemented in the QPushButton and QToolButton classes and checkable buttons are implemented in the QRadioButton and QCheckBox classes.

Any button can display a label containing text and an icon. The method setText() sets the text and setIcon() sets the icon. If a button is disabled, the label is changed to give the button a disabled appearance.

If the button is a text button with a string containing an ampersand ('&'), QAbstractButton automatically creates a shortcut key.

QPushButton *button = new QPushButton(tr("Ro&ck && Roll"), this);

The Alt+C shortcut is assigned to the button, i.e., when the user presses Alt+C the button will call animateClick(). See the QShortcut documentation for details (to display an actual ampersand, use '&&').

You can also set a custom shortcut key using the setShortcut() function. This is useful mostly for buttons that do not have any text, because they have no automatic shortcut.

button->setIcon(QIcon(":/images/print.png"));

button->setShortcut(tr("Alt+F7"));

All of the buttons provided by CopperSpice (QPushButton, QToolButton, QCheckBox, and QRadioButton) can display both text and icons. A button can be made the default button in a dialog are provided by QPushButton::setDefault() and QPushButton::setAutoDefault().

QAbstractButton provides most of the states used for buttons:

isDown() indicates whether the button is pressed down.
isChecked() indicates whether the button is checked. Only checkable buttons can be checked and unchecked (see below).
isEnabled() indicates whether the button can be pressed by the user. As opposed to other widgets, buttons derived from QAbstractButton accepts mouse and context menu events when disabled.
setAutoRepeat() sets whether the button will auto-repeat if the user holds it down. autoRepeatDelay and autoRepeatInterval define how auto-repetition is done.
setCheckable() sets whether the button is a toggle button or not.

The difference between isDown() and isChecked()is when the user clicks a toggle button to check it, the button is first pressed then released into the checked state. When the user clicks it again (to uncheck it), the button moves first to the pressed state, then to the unchecked state (isChecked() and isDown() are both false).

QAbstractButton provides four signals as follows.

pressed() is emitted when the left mouse button is pressed while the mouse cursor is inside the button.
released() is emitted when the left mouse button is released.
clicked() is emitted when the button is first pressed and then released, when the shortcut key is typed, or when click() or animateClick() is called.
toggled() is emitted when the state of a toggle button changes.

To subclass QAbstractButton you must reimplement at least paintEvent() to draw the button's outline and its text or pixmap. It is generally advisable to reimplement sizeHint() as well, and sometimes hitButton() (to determine whether a button press is within the button). For buttons with more than two states (like tri-state buttons), you will also have to reimplement checkStateSet() and nextCheckState().

See also: QButtonGroup

Constructor & Destructor Documentation

QAbstractButton::QAbstractButton ( QWidget * parent = nullptr )

explicit

Constructs an abstract button with a parent.

QAbstractButton::~QAbstractButton ( )

Destroys the button.

Method Documentation

void QAbstractButton::animateClick ( int msec = 100 )

slot

Performs an animated click: the button is pressed immediately, and released msec milliseconds later (the default is 100 ms). Calling this function again before the button was released will reset the release timer. All signals associated with a click are emitted as appropriate.

This function does nothing if the button is disabled.

See also: click()

bool QAbstractButton::autoExclusive ( ) const

Returns the value of the property.

bool QAbstractButton::autoRepeat ( ) const

Returns the value of the property.

int QAbstractButton::autoRepeatDelay ( ) const

Returns the value of the property.

int QAbstractButton::autoRepeatInterval ( ) const

Returns the value of the property.

void QAbstractButton::changeEvent ( QEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::changeEvent()

Reimplemented in QToolButton::changeEvent()

void QAbstractButton::checkStateSet ( )

protectedvirtual

This virtual handler is called when setChecked() was called, unless it was called from within nextCheckState(). It allows subclasses to reset their intermediate button states.

See also: nextCheckState()

Reimplemented in QCheckBox::checkStateSet()

void QAbstractButton::click ( )

slot

Performs a click.

All the usual signals associated with a click are emitted as appropriate. If the button is checkable, the state of the button is toggled.

This function does nothing if the button is disabled.

See also: animateClick()

void QAbstractButton::clicked ( bool checked = false )

signal

This signal is emitted when the button is activated. This can occur when the button is pressed, the shortcut key is typed, or when click() or animateClick() is called. This signal is not emitted if you call setDown(), setChecked() or toggle().

If the button is checkable checked will be true if the button is checked, or false if the button is unchecked.

See also: pressed(), released(), toggled()

bool QAbstractButton::event ( QEvent * event )

overrideprotected

Reimplemented from QWidget::event()

void QAbstractButton::focusInEvent ( QFocusEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::focusInEvent()

Reimplemented in QPushButton::focusInEvent()

void QAbstractButton::focusOutEvent ( QFocusEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::focusOutEvent()

Reimplemented in QPushButton::focusOutEvent()

QButtonGroup * QAbstractButton::group ( ) const

Returns the group that this button belongs to. If the button is not a member of any QButtonGroup, this methods returns a nullptr.

See also: QButtonGroup

bool QAbstractButton::hitButton ( const QPoint & pos ) const

protectedvirtual

Returns true if pos is inside the clickable button rectangle, otherwise returns false. By default, the clickable area is the entire widget. Subclasses may reimplement this function to provide support for clickable areas of different shapes and sizes.

Reimplemented in QToolButton::hitButton(), QCheckBox::hitButton(), QRadioButton::hitButton()

QIcon QAbstractButton::icon ( ) const

Returns the value of the property.

QSize QAbstractButton::iconSize ( ) const

Returns the value of the property.

bool QAbstractButton::isCheckable ( ) const

Indicates whether the button can be pressed by the user.

bool QAbstractButton::isChecked ( ) const

Indicates whether the button is checked. Only checkable buttons can be checked and unchecked.

bool QAbstractButton::isDown ( ) const

Indicates whether the button is pressed down.

void QAbstractButton::keyPressEvent ( QKeyEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::keyPressEvent()

Reimplemented in QPushButton::keyPressEvent()

void QAbstractButton::keyReleaseEvent ( QKeyEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::keyReleaseEvent()

void QAbstractButton::mouseMoveEvent ( QMouseEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::mouseMoveEvent()

Reimplemented in QCheckBox::mouseMoveEvent(), QRadioButton::mouseMoveEvent()

void QAbstractButton::mousePressEvent ( QMouseEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::mousePressEvent()

Reimplemented in QToolButton::mousePressEvent()

void QAbstractButton::mouseReleaseEvent ( QMouseEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::mouseReleaseEvent()

Reimplemented in QToolButton::mouseReleaseEvent()

void QAbstractButton::nextCheckState ( )

protectedvirtual

This virtual handler is called when a button is clicked. The default implementation calls setChecked(!isChecked()) if the button isCheckable(). It allows subclasses to implement intermediate button states.

See also: checkStateSet()

Reimplemented in QToolButton::nextCheckState(), QCheckBox::nextCheckState()

void QAbstractButton::paintEvent ( QPaintEvent * event )

overrideprotectedpure virtual

Reimplemented from QWidget::paintEvent()

Implemented in QToolButton::paintEvent(), QPushButton::paintEvent(), QCheckBox::paintEvent(), QCommandLinkButton::paintEvent(), QRadioButton::paintEvent()

void QAbstractButton::pressed ( )

signal

This signal is emitted when the button is pressed down.

See also: released(), clicked()

void QAbstractButton::released ( )

signal

This signal is emitted when the button is released.

See also: pressed(), clicked(), toggled()

void QAbstractButton::setAutoExclusive ( bool enable )

Sets the value of the property to enable.

void QAbstractButton::setAutoRepeat ( bool enable )

Sets the value of the property to enable.

void QAbstractButton::setAutoRepeatDelay ( int delay )

Sets the value of the property to delay.

void QAbstractButton::setAutoRepeatInterval ( int interval )

Sets the value of the property to interval.

void QAbstractButton::setCheckable ( bool enable )

Sets the value of the property to enable.

void QAbstractButton::setChecked ( bool checked )

slot

Sets the value of the property to checked.

void QAbstractButton::setDown ( bool enable )

Sets the value of the property to enable.

void QAbstractButton::setIcon ( const QIcon & icon )

Sets the value of the property to icon. The default size of the icon is defined by the GUI style however it can be adjusted by setting the iconSize property.

void QAbstractButton::setIconSize ( const QSize & size )

slot

Sets the value of the property to size.

void QAbstractButton::setShortcut ( const QKeySequence & key )

Sets the value of the property to key.

void QAbstractButton::setText ( const QString & text )

Sets the value of the property to text.

QKeySequence QAbstractButton::shortcut ( ) const

Returns the value of the property.

QString QAbstractButton::text ( ) const

Returns the value of the property.

void QAbstractButton::timerEvent ( QTimerEvent * event )

overrideprotected

Reimplemented from QOBject::timerEvent()

void QAbstractButton::toggle ( )

slot

Toggles the state of a checkable button.

See also: checked

void QAbstractButton::toggled ( bool checked )

signal

This signal is emitted whenever a checkable button changes its state. If checked is true the button is now checked, if it is false the button is unchecked. This may be the result of a user action such as a mouse click or because setChecked() was called.

The states of buttons in radio button groups are updated before this signal is emitted. This means slots can act on either the "off" signal or the "on" signal emitted by the buttons in the group whose states have changed. Button groups can be created using the QButtonGroup class and updates to the button states monitored with the QButtonGroup::buttonClicked() signal.

For example, a slot that reacts to signals emitted by newly checked buttons but which ignores signals from buttons that have been unchecked can be implemented using the following pattern.

void MyWidget::reactToToggle(bool checked)
{
   if (checked) {
      // do something
   }
}

See also: checked, clicked()

Property Documentation

QAbstractButton::autoExclusive

This property holds whether auto exclusive behavior is enabled. If it is enabled, checkable buttons that belong to the same parent widget behave as if they were part of the same exclusive button group. In an exclusive button group, only one button can be checked at any time. Checking another button automatically unchecks the previously checked one.

The property has no effect on buttons that belong to a button group.

This property is off by default, except for radio buttons.

See also: QRadioButton

Properties	Class Methods
read	autoExclusive
write	setAutoExclusive

QAbstractButton::autoRepeat

This property holds whether autoRepeat is enabled. If it is enabled then the pressed(), released(), and clicked() signals are emitted at regular intervals while the button is down. The initial delay and the repetition interval are defined in milliseconds by autoRepeatDelay and autoRepeatInterval.

If a button is pressed by a shortcut key then auto-repeat is enabled and timed by the system and not by this class. The pressed(), released(), and clicked() signals will be emitted like in the normal case.

This property is off by default.

Properties	Class Methods
read	autoRepeat
write	setAutoRepeat

QAbstractButton::autoRepeatDelay

This property holds the initial delay of auto-repetition. If autoRepeat is enabled, then autoRepeatDelay defines the initial delay in milliseconds before auto-repetition occurs.

See also: QAbstractButton::autoRepeat, QAbstractButton::autoRepeatInterval

Properties	Class Methods
read	autoRepeatDelay
write	setAutoRepeatDelay

QAbstractButton::autoRepeatInterval

This property holds the interval of auto-repetition. If autoRepeat is enabled, then autoRepeatInterval defines the length of the auto-repetition interval in milliseconds.

See also: QAbstractButton::autoRepeat, QAbstractButton::autoRepeatDelay

Properties	Class Methods
read	autoRepeatInterval
write	setAutoRepeatInterval

QAbstractButton::checkable

This property holds whether the button is checkable.

By default, the button is not checkable.

See also: QAbstractButton::checked

Properties	Class Methods
read	isCheckable
write	setCheckable

QAbstractButton::checked

This property holds whether the button is checked. Only checkable buttons can be checked. By default, the button is unchecked.

See also: QAbstractButton::checkable

Properties	Class Methods
read	isChecked
write	setChecked
user	true

QAbstractButton::down

This property holds whether the button is pressed down. If this property is true the button is pressed down. The signals pressed() and clicked() are not emitted if you set this property to true. The default is false.

Properties	Class Methods
read	isDown
write	setDown
designable	true

QAbstractButton::icon

This property holds the icon shown on the button. The default size of the icon is defined by the GUI style however it can be adjusted by setting the iconSize property.

Properties	Class Methods
read	icon
write	setIcon

QAbstractButton::iconSize

This property holds the icon size used for this button. The default size is defined by the GUI style. This is a maximum size for the icons. Smaller icons will not be scaled up.

Properties	Class Methods
read	iconSize
write	setIconSize

QAbstractButton::shortcut

This property holds the mnemonic associated with the button.

Properties	Class Methods
read	shortcut
write	setShortcut

QAbstractButton::text

This property holds the text shown on the button. If the button has no text the text() function will return an empty string.

If the text contains an ampersand character ('&'), a shortcut is automatically created for it. The character that follows the '&' will be used as the shortcut key. Any previous shortcut will be overwritten, or cleared if no shortcut is defined by the text. See the QShortcut documentation for details (to display an actual ampersand, use '&&').

There is no default text.

Properties	Class Methods
read	text
write	setText

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