map.py 文件源码

def build(self): # building the app
        parent = Game()
        parent.serve_car()
        Clock.schedule_interval(parent.update, 1.0 / 60.0)
        self.painter = MyPaintWidget()
        clearbtn = Button(text='clear')
        savebtn = Button(text='save',pos=(parent.width,0))
        loadbtn = Button(text='load',pos=(2*parent.width,0))
        clearbtn.bind(on_release=self.clear_canvas)
        savebtn.bind(on_release=self.save)
        loadbtn.bind(on_release=self.load)
        parent.add_widget(self.painter)
        parent.add_widget(clearbtn)
        parent.add_widget(savebtn)
        parent.add_widget(loadbtn)
        return parent