code: def eventFilter(self, watched, event):
          
          if event.type() == self._triggerevent:
              self.show()
              return True
          else:
              return False
docs: Filter ToolTip events and display this tooltip widget, if watched requests a tooltip.
  
          :param watched: The watched object
          :type watched: QtCore.QObject
          :param event: The event sent by watched
          :type event: QtCore.QEvent
          :returns: True if the event was processed. False if the event should be passed on.
          :rtype: bool
          :raises: None