pass events to the parent

def on_event(self, event):
        '''pass events to the parent'''
        state = self.state
        if isinstance(event, wx.MouseEvent):
            self.on_mouse_event(event)
        if isinstance(event, wx.KeyEvent):
            self.on_key_event(event)
        if (isinstance(event, wx.MouseEvent) and
            not event.ButtonIsDown(wx.MOUSE_BTN_ANY) and
            event.GetWheelRotation() == 0):
            # don't flood the queue with mouse movement
            return
        evt = mp_util.object_container(event)
        pt = self.image_coordinates(wx.Point(evt.X,evt.Y))
        evt.X = pt.x
        evt.Y = pt.y
        state.out_queue.put(evt)