Actions can be added to widgets using QWidget.addAction() . This generates an ActionAdded event, which you can handle to provide custom behavior. For example, PySide.QtGui.QToolBar reimplements QWidget.actionEvent() to create PySide.QtGui.QToolButton s for the actions.
Constructs an action event. The type can be ActionChanged , ActionAdded , or ActionRemoved .
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.
If PySide.QtCore.QEvent.type() is ActionAdded , returns the action that should appear before PySide.QtGui.QActionEvent.action() . If this function returns 0, the action should be appended to already existing actions on the same widget.