def installEventFilter(self, QObject): # real signature unknown; restored from __doc__
        """ installEventFilter(self, QObject) """
        pass

    def removeEventFilter(self, QObject): # real signature unknown; restored from __doc__
        """ removeEventFilter(self, QObject) """
        pass

class EventWatcher(QtCore.QObject):
    def __init__(self, parent):
        super().__init__(parent)
        parent.installEventFilter(self)

    def eventFilter(self, source, event):
        if source is self.parent():
            if event.type() == QtCore.QEvent.Show:
                target = source.parent()
                while target.parent() is not None:
                    target = target.parent()
                source.removeEventFilter(self)
                target.installEventFilter(self)
        elif event.type() == QtCore.QEvent.Close:
            source.closeEvent(event)
            if event.isAccepted():
                self.parent().close()
            return True
        return QtCore.QObject.eventFilter(self, source, event)