def changeEvent(self, ev):
if ev.type() == QEvent.Type.WindowStateChange:
in_full_screen_mode = self.isFullScreen()
if self.in_full_screen_mode is None or self.in_full_screen_mode != in_full_screen_mode:
self.in_full_screen_mode = in_full_screen_mode
self.web_view.notify_full_screen_state_change(self.in_full_screen_mode)
return MainWindow.changeEvent(self, ev)
