def eventFilter(self, obj, event):
if obj is self.__closeButton:
etype = event.type()
if etype == QEvent.MouseButtonPress:
self.setExpanded(not self.__expanded)
return True
elif etype == QEvent.MouseButtonDblClick or \
etype == QEvent.MouseButtonRelease:
return True
# TODO: which other events can trigger the button (is the button
# focusable).
return QDockWidget.eventFilter(self, obj, event)
