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|qmake:||QT += gui|
|QActionEvent(int type, QAction *action, QAction *before = nullptr)|
|QAction *||action() const|
|QAction *||before() const|
Actions can be added to widgets using QWidget::addAction(). This generates an ActionAdded event, which you can handle to provide custom behavior. For example, QToolBar reimplements QWidget::actionEvent() to create QToolButtons for the actions.
action is the action that is changed, added, or removed. If type is ActionAdded, the action is to be inserted before the action before. If before is 0, the action is appended.
Returns the action that is changed, added, or removed.
See also before().