def zoomPressEvent(self, event):
        TimezoneMap.zoomPressEvent(self, event)

        if event.button == 1:
            self.tzFilter.refilter()
    def zoomPressEvent(self, event):
        TimezoneMap.zoomPressEvent(self, event)

        if event.button == 1:
            self.tzFilter.refilter()