The QAction class provides an abstraction for user commands that can be added to different user interface components. More...

#include <qaction.h>

Inheritance diagram for QAction:

Collaboration diagram for QAction:

Public Types
enum	MenuRole { NoRole = 0 , TextHeuristicRole , ApplicationSpecificRole , AboutQtRole , AboutRole , PreferencesRole , QuitRole }
	This enum describes how an action should be moved into the application menu on \macos. More...

enum	Priority { LowPriority = 0 , NormalPriority = 128 , HighPriority = 256 }
	This enum defines priorities for actions in user interface. More...

enum	ActionEvent { Trigger , Hover }
	This enum type is used when calling QAction::activate() More...

Public Slots
void	trigger ()
	This is a convenience slot that calls activate(Trigger).

void	hover ()
	This is a convenience slot that calls activate(Hover).

void	setChecked (bool)

void	toggle ()
	This is a convenience function for the \l checked property.

void	setEnabled (bool)

void	resetEnabled ()

void	setDisabled (bool b)
	This is a convenience function for the \l enabled property, that is useful for signals–slots connections.

void	setVisible (bool)

Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe

Signals
void	changed ()
	This signal is emitted when an action has changed.

void	enabledChanged (bool enabled)

void	checkableChanged (bool checkable)

void	visibleChanged ()

void	triggered (bool checked=false)
	This signal is emitted when an action is activated by the user; for example, when the user clicks a menu option, toolbar button, or presses an action's shortcut key combination, or when trigger() was called.

void	hovered ()
	This signal is emitted when an action is highlighted by the user; for example, when the user pauses with the cursor over a menu option, toolbar button, or presses an action's shortcut key combination.

void	toggled (bool)
	This signal is emitted whenever a checkable action changes its isChecked() status.

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

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

Public Member Functions
	QAction (QObject *parent=nullptr)
	Constructs an action with parent.

	QAction (const QString &text, QObject *parent=nullptr)
	Constructs an action with some text and parent.

	QAction (const QIcon &icon, const QString &text, QObject *parent=nullptr)
	Constructs an action with an icon and some text and parent.

	~QAction ()
	Destroys the object and frees allocated resources.

QList< QObject * >	associatedObjects () const

void	setActionGroup (QActionGroup *group)
	Sets this action group to group.

QActionGroup *	actionGroup () const
	Returns the action group for this action.

void	setIcon (const QIcon &icon)

QIcon	icon () const

void	setText (const QString &text)

QString	text () const

void	setIconText (const QString &text)

QString	iconText () const

void	setToolTip (const QString &tip)

QString	toolTip () const

void	setStatusTip (const QString &statusTip)

QString	statusTip () const

void	setWhatsThis (const QString &what)

QString	whatsThis () const

void	setPriority (Priority priority)

Priority	priority () const

void	setSeparator (bool b)
	If b is true then this action will be considered a separator.

bool	isSeparator () const
	Returns `true` if this action is a separator action; otherwise it returns `false`.

void	setFont (const QFont &font)

QFont	font () const

void	setCheckable (bool)

bool	isCheckable () const

QVariant	data () const
	Returns the user data as set in QAction::setData.

void	setData (const QVariant &var)
	Sets the action's internal data to the given data.

bool	isChecked () const

bool	isEnabled () const

bool	isVisible () const

void	activate (ActionEvent event)
	Sends the relevant signals for ActionEvent event.

void	setMenuRole (MenuRole menuRole)

MenuRole	menuRole () const

template<typename T = QMenu*>
T	menu () const
	Returns the menu contained by this action.

template<typename T = QMenu*>
void	setMenu (T m)
	Sets the menu contained by this action to the specified menu.

void	setIconVisibleInMenu (bool visible)

bool	isIconVisibleInMenu () const

void	setShortcutVisibleInContextMenu (bool show)

bool	isShortcutVisibleInContextMenu () const

bool	showStatusText (QObject *object=nullptr)
	Updates the relevant status bar for the UI represented by object by sending a QStatusTipEvent.

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

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

virtual bool	event (QEvent *event)
	This virtual function receives events to an object and should return true if the event e was recognized and processed.

virtual bool	eventFilter (QObject watched, QEvent event)
	Filters events if this object has been installed as an event filter for the watched object.

QString	objectName () const

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

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

QBindable< QString >	bindableObjectName ()

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

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

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

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

	QAction (QActionPrivate &dd, QObject *parent)

Protected Member Functions inherited from QObject
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.

int	senderSignalIndex () const

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

bool	isSignalConnected (const QMetaMethod &signal) const

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

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

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

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

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

Properties
bool	checkable
	whether the action is a checkable action

bool	checked
	whether the action is checked.

bool	enabled
	whether the action is enabled

QIcon	icon
	the action's icon

QString	text
	the action's descriptive text

QString	iconText
	the action's descriptive icon text

QString	toolTip
	the action's tooltip

QString	statusTip
	the action's status tip

QString	whatsThis
	the action's "What's This?" help text

QFont	font
	the action's font

bool	visible
	whether the action can be seen (e.g.

MenuRole	menuRole
	the action's menu role

bool	iconVisibleInMenu
	Whether or not an action should show an icon in a menu.

bool	shortcutVisibleInContextMenu
	Whether or not an action should show a shortcut in a context menu.

Priority	priority
	the actions's priority in the user interface.

Properties inherited from QObject
QString	objectName
	the name of this object

Friends
class	QActionGroup

class	QWidget

class	QMenu

class	QMenuPrivate

class	QToolButton

class	QGraphicsWidget

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

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

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

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

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

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

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

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

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

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

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

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

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

	QObjectList
	\macro Q_CLASSINFO(Name, Value)

Detailed Description

The QAction class provides an abstraction for user commands that can be added to different user interface components.

Since: 6.0

\inmodule QtGui

In applications many common commands can be invoked via menus, toolbar buttons, and keyboard shortcuts. Since the user expects each command to be performed in the same way, regardless of the user interface used, it is useful to represent each command as an action.

Actions can be added to user interface elements such as menus and toolbars, and will automatically keep the UI in sync. For example, in a word processor, if the user presses a Bold toolbar button, the Bold menu item will automatically be checked.

A QAction may contain an icon, descriptive text, icon text, a keyboard shortcut, status text, "What's This?" text, and a tooltip. All properties can be set independently with setIcon(), setText(), setIconText(), setShortcut(), setStatusTip(), setWhatsThis(), and setToolTip(). Icon and text, as the two most important properties, can also be set in the constructor. It's possible to set an individual font with setFont(), which e.g. menus respect when displaying the action as a menu item.

We recommend that actions are created as children of the window they are used in. In most cases actions will be children of the application's main window.

Definition at line 29 of file qaction.h.

Member Enumeration Documentation

◆ ActionEvent

enum QAction::ActionEvent

This enum type is used when calling QAction::activate()

\value Trigger this will cause the QAction::triggered() signal to be emitted.

\value Hover this will cause the QAction::hovered() signal to be emitted.

Enumerator
Trigger
Hover

Definition at line 175 of file qaction.h.

◆ MenuRole

enum QAction::MenuRole

This enum describes how an action should be moved into the application menu on \macos.

\value NoRole This action should not be put into the application menu \value TextHeuristicRole This action should be put in the application menu based on the action's text as described in the QMenuBar documentation. \value ApplicationSpecificRole This action should be put in the application menu with an application specific role \value AboutQtRole This action handles the "About Qt" menu item. \value AboutRole This action should be placed where the "About" menu item is in the application menu. The text of the menu item will be set to "About <application name>". The application name is fetched from the {Info.plist} file in the application's bundle (See \l{Qt for macOS - Deployment}). \value PreferencesRole This action should be placed where the "Preferences..." menu item is in the application menu. \value QuitRole This action should be placed where the Quit menu item is in the application menu.

Setting this value only has effect on items that are in the immediate menus of the menubar, not the submenus of those menus. For example, if you have File menu in your menubar and the File menu has a submenu, setting the MenuRole for the actions in that submenu have no effect. They will never be moved.

Enumerator
NoRole
TextHeuristicRole
ApplicationSpecificRole
AboutQtRole
AboutRole
PreferencesRole
QuitRole

Definition at line 61 of file qaction.h.

◆ Priority

enum QAction::Priority

This enum defines priorities for actions in user interface.

\value LowPriority The action should not be prioritized in the user interface.

\value NormalPriority

\value HighPriority The action should be prioritized in the user interface.

See also: priority

Enumerator
LowPriority
NormalPriority
HighPriority

Definition at line 64 of file qaction.h.

Constructor & Destructor Documentation

◆ QAction() [1/4]

QAction::QAction ( QObject * parent = nullptr )

explicit

Constructs an action with parent.

If parent is an action group the action will be automatically inserted into the group.

Note: The parent argument is optional since Qt 5.7.

Definition at line 230 of file qaction.cpp.

◆ QAction() [2/4]

QAction::QAction	(	const QString &	text,
		QObject *	parent = `nullptr`
	)

explicit

Constructs an action with some text and parent.

If parent is an action group the action will be automatically inserted into the group.

A stripped version of text (for example, "\&Menu Option..." becomes "Menu Option") will be used for tooltips and icon text unless you specify a different text using setToolTip() or setIconText(), respectively.

See also: text

Definition at line 246 of file qaction.cpp.

References d, and text.

◆ QAction() [3/4]

QAction::QAction	(	const QIcon &	icon,
		const QString &	text,
		QObject *	parent = `nullptr`
	)

explicit

Constructs an action with an icon and some text and parent.

If parent is an action group the action will be automatically inserted into the group.

A stripped version of text (for example, "\&Menu Option..." becomes "Menu Option") will be used for tooltips and icon text unless you specify a different text using setToolTip() or setIconText(), respectively.

See also: text, icon

Definition at line 264 of file qaction.cpp.

References d, and icon.

◆ ~QAction()

QAction::~QAction ( )

Destroys the object and frees allocated resources.

Definition at line 447 of file qaction.cpp.

References d, QGuiApplicationPrivate::instance(), and qApp.

Here is the call graph for this function:

◆ QAction() [4/4]

QAction::QAction	(	QActionPrivate &	dd,
		QObject *	parent
	)

protected

Definition at line 274 of file qaction.cpp.

References d, and QObject::parent().

Here is the call graph for this function:

Member Function Documentation

◆ actionGroup()

QActionGroup * QAction::actionGroup ( ) const

Returns the action group for this action.

If no action group manages this action, then \nullptr will be returned.

See also: QActionGroup, setActionGroup()

Definition at line 493 of file qaction.cpp.

References d.

Referenced by QMenuPrivate::copyActionToPlatformItem(), and QMenu::initStyleOption().

Here is the caller graph for this function:

◆ activate()

void QAction::activate ( ActionEvent event )

Sends the relevant signals for ActionEvent event.

Action-based widgets use this API to cause the QAction to emit signals as well as emitting their own.

Definition at line 1082 of file qaction.cpp.

References d, emit, QActionGroup::Exclusive, Hover, hovered(), QPointer< T >::isNull(), setChecked(), Trigger, and triggered().

Referenced by QMenuBarPrivate::activateAction(), QMenuPrivate::activateCausedStack(), and event().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ associatedObjects()

QList< QObject * > QAction::associatedObjects ( ) const

Since: 6.0 Returns a list of objects this action has been added to.

See also: QWidget::addAction(), QGraphicsWidget::addAction()

Definition at line 505 of file qaction.cpp.

References d.

Referenced by waitForPopup().

Here is the caller graph for this function:

◆ changed

void QAction::changed ( )

signal

This signal is emitted when an action has changed.

If you are only interested in actions in a given widget, you can watch for QWidget::actionEvent() sent with an QEvent::ActionChanged.

See also: QWidget::actionEvent()

Referenced by QActionGroup::addAction(), QMenuPrivate::init(), and QActionGroup::removeAction().

Here is the caller graph for this function:

◆ checkableChanged

void QAction::checkableChanged ( bool checkable )

signal

Referenced by setCheckable().

Here is the caller graph for this function:

◆ data()

QVariant QAction::data ( ) const

Returns the user data as set in QAction::setData.

See also: setData()

Definition at line 1056 of file qaction.cpp.

References d.

Referenced by QCalendarWidgetPrivate::_q_monthChanged(), QDialog::contextMenuEvent(), and setData().

Here is the caller graph for this function:

◆ enabledChanged

void QAction::enabledChanged ( bool enabled )

signal

◆ event()

bool QAction::event ( QEvent * e )

overrideprotectedvirtual

\reimp

Reimplemented from QObject.

Reimplemented in QWidgetAction.

Definition at line 1027 of file qaction.cpp.

References QEvent::ActionChanged, activate(), d, e, QObject::event(), QKeySequence::NativeText, Q_ASSERT_X, qWarning, QCoreApplication::sendEvent(), QEvent::Shortcut, and Trigger.

Referenced by QWidgetAction::event(), and QQuickParentAnimation::transition().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ font()

QFont QAction::font ( ) const

Definition at line 437 of file qaction.cpp.

References d.

◆ hover

void QAction::hover ( )

inlineslot

This is a convenience slot that calls activate(Hover).

Definition at line 211 of file qaction.h.

◆ hovered

void QAction::hovered ( )

signal

This signal is emitted when an action is highlighted by the user; for example, when the user pauses with the cursor over a menu option, toolbar button, or presses an action's shortcut key combination.

See also: activate()

Referenced by QWidgetPlatformMenuItem::QWidgetPlatformMenuItem(), activate(), QActionGroup::addAction(), QMenuPrivate::insertActionInPlatformMenu(), and QActionGroup::removeAction().

Here is the caller graph for this function:

◆ icon()

QIcon QAction::icon ( ) const

Definition at line 554 of file qaction.cpp.

References d.

◆ iconText()

QString QAction::iconText ( ) const

Definition at line 661 of file qaction.cpp.

References d, and qt_strippedText().

Here is the call graph for this function:

◆ isCheckable()

bool QAction::isCheckable ( ) const

Definition at line 847 of file qaction.cpp.

References d.

Referenced by QMenuPrivate::copyActionToPlatformItem(), QMenu::initStyleOption(), operator<<(), QToolButton::setDefaultAction(), and QMenuPrivate::updateActionRects().

Here is the caller graph for this function:

◆ isChecked()

bool QAction::isChecked ( ) const

Definition at line 892 of file qaction.cpp.

References d.

Referenced by QFileDialogPrivate::_q_showHeader(), QFileDialogPrivate::_q_showHidden(), QMenuPrivate::copyActionToPlatformItem(), QMenu::initStyleOption(), QPrintPreviewDialogPrivate::isFitting(), operator<<(), QToolButton::setDefaultAction(), and QPrintPreviewDialogPrivate::setFitting().

Here is the caller graph for this function:

◆ isEnabled()

bool QAction::isEnabled ( ) const

Definition at line 971 of file qaction.cpp.

References d.

Referenced by QMenuBarPrivate::activateAction(), QMenuPrivate::activateAction(), QMenuPrivate::copyActionToPlatformItem(), QMenuBarPrivate::copyActionToPlatformMenu(), QWidgetAction::event(), QMdiSubWindow::eventFilter(), QMenuBarPrivate::getNextAction(), QMenu::initStyleOption(), QMenuBar::initStyleOption(), QWidgetPlatformMenu::isEnabled(), QMenu::keyPressEvent(), QMenuBar::mousePressEvent(), QMenu::mouseReleaseEvent(), operator<<(), QMenuPrivate::popup(), QMenuBarPrivate::popupAction(), QMenuPrivate::popupAction(), QMenuPrivate::scrollMenu(), QMenuBarPrivate::setCurrentAction(), QMenuPrivate::setCurrentAction(), QToolButton::setDefaultAction(), QWidgetAction::setDefaultWidget(), QMenuPrivate::setFirstActionActive(), and QMenuPrivate::setSyncAction().

Here is the caller graph for this function:

◆ isIconVisibleInMenu()

bool QAction::isIconVisibleInMenu ( ) const

Definition at line 1254 of file qaction.cpp.

References Qt::AA_DontShowIconsInMenus, d, and QCoreApplication::testAttribute().

Referenced by QMenuPrivate::copyActionToPlatformItem(), and QMenu::initStyleOption().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ isSeparator()

bool QAction::isSeparator ( ) const

Returns true if this action is a separator action; otherwise it returns false.

See also: setSeparator()

Definition at line 585 of file qaction.cpp.

References d.

Referenced by QMenuPrivate::activateAction(), QMenuBarPrivate::calcActionRects(), QMenuPrivate::copyActionToPlatformItem(), QMenuPrivate::getLastVisibleAction(), QMenu::initStyleOption(), QMenu::isEmpty(), QMenu::keyPressEvent(), QMenu::mouseMoveEvent(), QMenuSloppyState::processMouseEvent(), QMenuPrivate::scrollMenu(), QMenuPrivate::setCurrentAction(), QMenuPrivate::setFirstActionActive(), QMenuPrivate::setSyncAction(), and QMenuPrivate::updateActionRects().

Here is the caller graph for this function:

◆ isShortcutVisibleInContextMenu()

bool QAction::isShortcutVisibleInContextMenu ( ) const

Definition at line 1290 of file qaction.cpp.

References Qt::AA_DontShowShortcutsInContextMenus, d, and QCoreApplication::testAttribute().

Referenced by QMenu::initStyleOption(), and QMenuPrivate::updateActionRects().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ isVisible()

bool QAction::isVisible ( ) const

Definition at line 1018 of file qaction.cpp.

References d.

Referenced by QMenuBarPrivate::calcActionRects(), QMenuPrivate::copyActionToPlatformItem(), QMenuBarPrivate::copyActionToPlatformMenu(), QMenuPrivate::getLastVisibleAction(), QMenu::isEmpty(), QToolBarItem::isEmpty(), operator<<(), and QMenuPrivate::updateActionRects().

Here is the caller graph for this function:

◆ menu()

template<typename T = QMenu*>

QMenu * QAction::menu ( ) const

inline

Returns the menu contained by this action.

In widget applications, actions that contain menus can be used to create menu items with submenus, or inserted into toolbars to create buttons with popup menus.

See also: QMenu::addAction(), QMenu::menuInAction()

Definition at line 186 of file qaction.h.

Referenced by QMenuBarPrivate::_q_internalShortcutActivated(), QMenuPrivate::copyActionToPlatformItem(), QMenu::event(), QMenuBarPrivate::getPlatformMenu(), QMenu::initStyleOption(), QMenu::keyPressEvent(), QMenu::mouseReleaseEvent(), QMenuBar::mouseReleaseEvent(), QMenuBarPrivate::popupAction(), QMenuPrivate::popupAction(), QToolButton::setDefaultAction(), QMenuPrivate::setSyncAction(), and QMenuSloppyState::timeout().

Here is the caller graph for this function:

◆ menuRole()

QAction::MenuRole QAction::menuRole ( ) const

Definition at line 1190 of file qaction.cpp.

References d.

◆ priority()

QAction::Priority QAction::priority ( ) const

Definition at line 807 of file qaction.cpp.

References d.

◆ resetEnabled

void QAction::resetEnabled ( )

slot

Definition at line 962 of file qaction.cpp.

References d.

◆ setActionGroup()

void QAction::setActionGroup ( QActionGroup * group )

Sets this action group to group.

The action will be automatically added to the group's list of actions.

Actions within the group will be mutually exclusive.

See also: QActionGroup, actionGroup()

Definition at line 473 of file qaction.cpp.

References d.

◆ setCheckable()

void QAction::setCheckable ( bool b )

Definition at line 832 of file qaction.cpp.

References checkableChanged(), d, emit, and toggled().

Referenced by QFileDialogPrivate::createMenuActions(), QFileDialogPrivate::createWidgets(), QDockWidgetPrivate::init(), QToolBarPrivate::init(), QWidgetPlatformMenuItem::setCheckable(), and QPrintPreviewDialogPrivate::setupActions().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ setChecked

void QAction::setChecked ( bool b )

slot

Definition at line 877 of file qaction.cpp.

References d, emit, and toggled().

Referenced by QPrintPreviewDialogPrivate::_q_pageSetup(), activate(), QFileDialogPrivate::createWidgets(), QFileDialogPrivate::restoreWidgetState(), Viewer::setBrightness(), QWidgetPlatformMenuItem::setChecked(), QPrintPreviewDialogPrivate::setFitting(), QPrintPreviewDialogPrivate::setupActions(), and toggle().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ setData()

void QAction::setData ( const QVariant & data )

Sets the action's internal data to the given data.

See also: data()

Definition at line 1067 of file qaction.cpp.

References d, and data().

Referenced by QCalendarWidgetPrivate::createNavigationBar().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ setDisabled

void QAction::setDisabled ( bool b )

inlineslot

This is a convenience function for the \l enabled property, that is useful for signals–slots connections.

If b is true the action is disabled; otherwise it is enabled.

Definition at line 216 of file qaction.h.

◆ setEnabled

void QAction::setEnabled ( bool b )

slot

Definition at line 927 of file qaction.cpp.

References d, and QAPP_CHECK.

Referenced by QFileDialogPrivate::_q_showContextMenu(), QFileDialogPrivate::createMenuActions(), QUndoGroup::createRedoAction(), QLineEdit::createStandardContextMenu(), QUndoGroup::createUndoAction(), QPrintPreviewDialogPrivate::init(), MainWindow::openFile(), QLineEdit::setClearButtonEnabled(), QWidgetPlatformMenu::setEnabled(), QWidgetPlatformMenuItem::setEnabled(), QMdiSubWindowPrivate::setEnabled(), MainWindow::updateMenus(), and QPrintPreviewDialogPrivate::updateNavActions().

Here is the caller graph for this function:

◆ setFont()

void QAction::setFont ( const QFont & font )

Definition at line 426 of file qaction.cpp.

References d, and font.

Referenced by QWidgetPlatformMenuItem::setFont().

Here is the caller graph for this function:

◆ setIcon()

void QAction::setIcon ( const QIcon & icon )

Definition at line 547 of file qaction.cpp.

References d, and icon.

Referenced by qt_setupActionIcon(), setActionIcon(), and QWidgetPlatformMenuItem::setIcon().

Here is the caller graph for this function:

◆ setIconText()

void QAction::setIconText ( const QString & text )

Definition at line 651 of file qaction.cpp.

References d, and text.

◆ setIconVisibleInMenu()

void QAction::setIconVisibleInMenu ( bool visible )

Definition at line 1240 of file qaction.cpp.

References Qt::AA_DontShowIconsInMenus, d, QCoreApplication::testAttribute(), and visible.

Here is the call graph for this function:

◆ setMenu()

template<typename T = QMenu*>

void QAction::setMenu ( T m )

inline

Sets the menu contained by this action to the specified menu.

Definition at line 191 of file qaction.h.

Referenced by QMenuPrivate::init(), and QWidgetPlatformMenuItem::setMenu().

Here is the caller graph for this function:

◆ setMenuRole()

void QAction::setMenuRole ( MenuRole menuRole )

Definition at line 1180 of file qaction.cpp.

References d, and menuRole.

Referenced by QDockWidgetPrivate::init(), and QWidgetPlatformMenuItem::setRole().

Here is the caller graph for this function:

◆ setPriority()

void QAction::setPriority ( Priority priority )

Definition at line 797 of file qaction.cpp.

References d, and priority.

◆ setSeparator()

void QAction::setSeparator ( bool b )

If b is true then this action will be considered a separator.

How a separator is represented depends on the widget it is inserted into. Under most circumstances the text, submenu, and icon will be ignored for separator actions.

See also: isSeparator()

Definition at line 569 of file qaction.cpp.

References d.

Referenced by QMenu::addSection(), QMenu::addSection(), QMenu::addSeparator(), QToolBar::addSeparator(), QMenu::insertSection(), QMenu::insertSection(), QMenu::insertSeparator(), QMenuBar::insertSeparator(), QToolBar::insertSeparator(), and QWidgetPlatformMenuItem::setIsSeparator().

Here is the caller graph for this function:

◆ setShortcutVisibleInContextMenu()

void QAction::setShortcutVisibleInContextMenu ( bool show )

Definition at line 1276 of file qaction.cpp.

References Qt::AA_DontShowShortcutsInContextMenus, d, QCoreApplication::testAttribute(), and visible.

Here is the call graph for this function:

◆ setStatusTip()

void QAction::setStatusTip ( const QString & statusTip )

Definition at line 712 of file qaction.cpp.

References d.

◆ setText()

void QAction::setText ( const QString & text )

Definition at line 611 of file qaction.cpp.

References d, and text.

Referenced by QDockWidgetPrivate::init(), QFileDialogPrivate::retranslateStrings(), and QWidgetPlatformMenuItem::setText().

Here is the caller graph for this function:

◆ setToolTip()

void QAction::setToolTip ( const QString & tip )

Definition at line 680 of file qaction.cpp.

References d.

◆ setVisible

void QAction::setVisible ( bool b )

slot

Definition at line 990 of file qaction.cpp.

References d.

Referenced by QWidgetAction::setDefaultWidget(), QWidgetPlatformMenu::setVisible(), QWidgetPlatformMenuItem::setVisible(), and QMdiSubWindowPrivate::setVisible().

Here is the caller graph for this function:

◆ setWhatsThis()

void QAction::setWhatsThis ( const QString & what )

Definition at line 752 of file qaction.cpp.

References d.

◆ showStatusText()

bool QAction::showStatusText ( QObject * object = nullptr )

Updates the relevant status bar for the UI represented by object by sending a QStatusTipEvent.

Returns true if an event was sent, otherwise returns false.

If a null widget is specified, the event is sent to the action's parent.

See also: statusTip

Definition at line 736 of file qaction.cpp.

References d, and statusTip.

Referenced by QMenuBarPrivate::activateAction(), QMenuPrivate::activateAction(), and QMenuPrivate::setCurrentAction().

Here is the caller graph for this function:

◆ statusTip()

QString QAction::statusTip ( ) const

Definition at line 722 of file qaction.cpp.

References d.

◆ text()

QString QAction::text ( ) const

Definition at line 621 of file qaction.cpp.

References d.

◆ toggle

void QAction::toggle ( )

slot

This is a convenience function for the \l checked property.

Connect to it to change the checked state to its opposite state.

Definition at line 859 of file qaction.cpp.

References d, and setChecked().

Here is the call graph for this function:

◆ toggled

void QAction::toggled ( bool checked )

signal

This signal is emitted whenever a checkable action changes its isChecked() status.

This can be the result of a user interaction, or because setChecked() was called. As setChecked() changes the QAction, it emits changed() in addition to toggled().

checked is true if the action is checked, or false if the action is unchecked.

See also: activate(), triggered(), checked

Referenced by setCheckable(), and setChecked().

Here is the caller graph for this function:

◆ toolTip()

QString QAction::toolTip ( ) const

Definition at line 690 of file qaction.cpp.

References d, and qt_strippedText().

Here is the call graph for this function:

◆ trigger

void QAction::trigger ( )

inlineslot

This is a convenience slot that calls activate(Trigger).

Definition at line 210 of file qaction.h.

References Trigger.

Referenced by QMenuPrivate::insertActionInPlatformMenu().

Here is the caller graph for this function:

◆ triggered

void QAction::triggered ( bool checked = false )

signal

This signal is emitted when an action is activated by the user; for example, when the user clicks a menu option, toolbar button, or presses an action's shortcut key combination, or when trigger() was called.

Notably, it is not emitted when setChecked() or toggle() is called.

If the action is checkable, checked is true if the action is checked, or false if the action is unchecked.

See also: activate(), toggled(), checked

Referenced by QWidgetPlatformMenuItem::QWidgetPlatformMenuItem(), activate(), QWidget::addAction(), QWidget::addAction(), QActionGroup::addAction(), QUndoGroup::createRedoAction(), QUndoGroup::createUndoAction(), and QActionGroup::removeAction().

Here is the caller graph for this function:

◆ visibleChanged

void QAction::visibleChanged ( )

signal

◆ whatsThis()

QString QAction::whatsThis ( ) const

Definition at line 762 of file qaction.cpp.

References d.

Friends And Related Symbol Documentation

◆ QActionGroup

friend class QActionGroup

friend

Definition at line 230 of file qaction.h.

◆ QGraphicsWidget

friend class QGraphicsWidget

friend

Definition at line 235 of file qaction.h.

◆ QMenu

friend class QMenu

friend

Definition at line 232 of file qaction.h.

◆ QMenuPrivate

friend class QMenuPrivate

friend

Definition at line 233 of file qaction.h.

◆ QToolButton

friend class QToolButton

friend

Definition at line 234 of file qaction.h.

◆ QWidget

friend class QWidget

friend

Definition at line 231 of file qaction.h.

Property Documentation

◆ checkable

QAction::checkable

readwrite

whether the action is a checkable action

A checkable action is one which has an on/off state. For example, in a word processor, a Bold toolbar button may be either on or off. An action which is not a toggle action is a command action; a command action is simply executed, e.g. file save. By default, this property is false.

In some situations, the state of one toggle action should depend on the state of others. For example, "Left Align", "Center" and "Right Align" toggle actions are mutually exclusive. To achieve exclusive toggling, add the relevant toggle actions to a QActionGroup with the QActionGroup::exclusive property set to true.

See also: setChecked()

Definition at line 245 of file qaction.h.

◆ checked

QAction::checked

readwrite

whether the action is checked.

Only checkable actions can be checked. By default, this is false (the action is unchecked).

Note: The notifier signal for this property is toggled(). As toggling a QAction changes its state, it will also emit a changed() signal.

See also: checkable, toggled()

Definition at line 245 of file qaction.h.

◆ enabled

QAction::enabled

readwrite

whether the action is enabled

Disabled actions cannot be chosen by the user. They do not disappear from menus or toolbars, but they are displayed in a way which indicates that they are unavailable. For example, they might be displayed using only shades of gray.

\uicontrol{What's This?} help on disabled actions is still available, provided that the QAction::whatsThis property is set.

An action will be disabled when all widgets to which it is added (with QWidget::addAction()) are disabled or not visible. When an action is disabled, it is not possible to trigger it through its shortcut.

By default, this property is true (actions are enabled).

See also: text

Definition at line 245 of file qaction.h.

◆ font

QAction::font

readwrite

the action's font

The font property is used to render the text set on the QAction. The font can be considered a hint as it will not be consulted in all cases based upon application and style.

By default, this property contains the application's default font.

See also: setText()

Definition at line 245 of file qaction.h.

Referenced by QMenuPrivate::copyActionToPlatformItem(), QMenu::initStyleOption(), QToolButton::setDefaultAction(), and setFont().

◆ icon

QAction::icon

readwrite

the action's icon

In toolbars, the icon is used as the tool button icon; in menus, it is displayed to the left of the menu text. There is no default icon.

If a null icon (QIcon::isNull()) is passed into this function, the icon of the action is cleared.

Definition at line 245 of file qaction.h.

Referenced by QAction(), QMenuBarPrivate::calcActionRects(), QMenuPrivate::copyActionToPlatformItem(), QMenu::initStyleOption(), QMenuBar::initStyleOption(), QToolButton::setDefaultAction(), setIcon(), and QMenuPrivate::updateActionRects().

◆ iconText

QAction::iconText

readwrite

the action's descriptive icon text

If QToolBar::toolButtonStyle is set to a value that permits text to be displayed, the text defined held in this property appears as a label in the relevant tool button.

It also serves as the default text in menus and tooltips if the action has not been defined with setText() or setToolTip(), and will also be used in toolbar buttons if no icon has been defined using setIcon().

If the icon text is not explicitly set, the action's normal text will be used for the icon text.

By default, this property contains an empty string.

See also: setToolTip(), setStatusTip()

Definition at line 245 of file qaction.h.

Referenced by QToolButton::setDefaultAction().

◆ iconVisibleInMenu

QAction::iconVisibleInMenu

readwrite

Whether or not an action should show an icon in a menu.

In some applications, it may make sense to have actions with icons in the toolbar, but not in menus. If true, the icon (if valid) is shown in the menu, when it is false, it is not shown.

The default is to follow whether the Qt::AA_DontShowIconsInMenus attribute is set for the application. Explicitly settings this property overrides the presence (or absence) of the attribute.

For example:

QApplication app(argc, argv);
app.setAttribute(Qt::AA_DontShowIconsInMenus);  // Icons are *no longer shown* in menus
// ...
QAction *myAction = new QAction();
// ...
myAction->setIcon(SomeIcon);
myAction->setIconVisibleInMenu(true);   // Icon *will* be shown in menus for *this* action.

See also: icon, QCoreApplication::setAttribute()

Definition at line 245 of file qaction.h.

◆ menuRole

QAction::menuRole

readwrite

the action's menu role

This indicates what role the action serves in the application menu on \macos. By default all actions have the TextHeuristicRole, which means that the action is added based on its text (see QMenuBar for more information).

The menu role can only be changed before the actions are put into the menu bar in \macos (usually just before the first application window is shown).

Definition at line 245 of file qaction.h.

Referenced by QMenuPrivate::copyActionToPlatformItem(), operator<<(), and setMenuRole().

◆ priority

QAction::priority

readwrite

the actions's priority in the user interface.

This property can be set to indicate how the action should be prioritized in the user interface.

For instance, when toolbars have the Qt::ToolButtonTextBesideIcon mode set, then actions with LowPriority will not show the text labels.

Definition at line 245 of file qaction.h.

Referenced by setPriority().

◆ shortcutVisibleInContextMenu

QAction::shortcutVisibleInContextMenu

readwrite

Whether or not an action should show a shortcut in a context menu.

In some applications, it may make sense to have actions with shortcuts in context menus. If true, the shortcut (if valid) is shown when the action is shown via a context menu, when it is false, it is not shown.

The default is to follow whether the Qt::AA_DontShowShortcutsInContextMenus attribute is set for the application. Explicitly setting this property overrides the attribute.

See also: shortcut, QCoreApplication::setAttribute()

Definition at line 245 of file qaction.h.

◆ statusTip

QAction::statusTip

readwrite

the action's status tip

The status tip is displayed on all status bars provided by the action's top-level parent widget.

By default, this property contains an empty string.

See also: setToolTip(), showStatusText()

Definition at line 245 of file qaction.h.

Referenced by QToolButton::setDefaultAction(), and showStatusText().

◆ text

QAction::text

readwrite

the action's descriptive text

If the action is added to a menu, the menu option will consist of the icon (if there is one), the text, and the shortcut (if there is one). If the text is not explicitly set in the constructor, or by using setText(), the action's description icon text will be used as text. There is no default text.

Certain UI elements, such as menus or buttons, can use '&' in front of a character to automatically create a mnemonic (a shortcut) for that character. For example, "&File" for a menu will create the shortcut \uicontrol Alt+F, which will open the File menu. "E&xit" will create the shortcut \uicontrol Alt+X for a button, or in a menu allow navigating to the menu item by pressing "x". (use '&&' to display an actual ampersand). The widget might consume and perform an action on a given shortcut.

See also: iconText

Definition at line 245 of file qaction.h.

Referenced by QAction(), QCalendarWidgetPrivate::_q_monthChanged(), QMenuBarPrivate::calcActionRects(), QMenuPrivate::copyActionToPlatformItem(), QMenuBarPrivate::copyActionToPlatformMenu(), QMenu::initStyleOption(), QMenuBar::initStyleOption(), QMenu::keyPressEvent(), QMenuBar::keyPressEvent(), operator<<(), setIconText(), setText(), QMenuPrivate::updateActionRects(), and QMenuBarPrivate::updateGeometries().

◆ toolTip

QAction::toolTip

readwrite

the action's tooltip

This text is used for the tooltip. If no tooltip is specified, the action's text is used.

By default, this property contains the action's text.

See also: setStatusTip(), setShortcut()

Definition at line 245 of file qaction.h.

Referenced by operator<<(), and QToolButton::setDefaultAction().

◆ visible

QAction::visible

readwrite

whether the action can be seen (e.g.

in menus and toolbars)

If visible is true the action can be seen (e.g. in menus and toolbars) and chosen by the user; if visible is false the action cannot be seen or chosen by the user.

Actions which are not visible are not grayed out; they do not appear at all.

By default, this property is true (actions are visible).

Definition at line 245 of file qaction.h.

Referenced by setIconVisibleInMenu(), and setShortcutVisibleInContextMenu().

◆ whatsThis

QAction::whatsThis

readwrite

the action's "What's This?" help text

The "What's This?" text is used to provide a brief description of the action. The text may contain rich text. There is no default "What's This?" text.

See also: QWhatsThis

Definition at line 245 of file qaction.h.

Referenced by QMenuPrivate::activateAction(), QMenu::event(), and QToolButton::setDefaultAction().

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

qtbase/src/gui/kernel/qaction.h
qtbase/src/gui/kernel/qaction.cpp

Public Types

Public Slots

Signals

Public Member Functions

Protected Member Functions

Properties

Friends

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ ActionEvent

◆ MenuRole

◆ Priority

Constructor & Destructor Documentation

◆ QAction() [1/4]

◆ QAction() [2/4]

◆ QAction() [3/4]

◆ ~QAction()

◆ QAction() [4/4]

Member Function Documentation

◆ actionGroup()

◆ activate()

◆ associatedObjects()

◆ changed

◆ checkableChanged

◆ data()

◆ enabledChanged

◆ event()

◆ font()

◆ hover

◆ hovered

◆ icon()

◆ iconText()

◆ isCheckable()

◆ isChecked()

◆ isEnabled()

◆ isIconVisibleInMenu()

◆ isSeparator()

◆ isShortcutVisibleInContextMenu()

◆ isVisible()

◆ menu()

◆ menuRole()

◆ priority()

◆ resetEnabled

◆ setActionGroup()

◆ setCheckable()

◆ setChecked

◆ setData()

◆ setDisabled

◆ setEnabled

◆ setFont()

◆ setIcon()

◆ setIconText()

◆ setIconVisibleInMenu()

◆ setMenu()

◆ setMenuRole()

◆ setPriority()

◆ setSeparator()

◆ setShortcutVisibleInContextMenu()

◆ setStatusTip()

◆ setText()

◆ setToolTip()

◆ setVisible

◆ setWhatsThis()

◆ showStatusText()

◆ statusTip()

◆ text()

◆ toggle

◆ toggled

◆ toolTip()

◆ trigger

◆ triggered

◆ visibleChanged

◆ whatsThis()

Friends And Related Symbol Documentation

◆ QActionGroup

◆ QGraphicsWidget

◆ QMenu

◆ QMenuPrivate

◆ QToolButton