小球碰壁反弹python tkinter

小球碰壁反弹是一款基于Python tkinter模块的小游戏，通过绘制一个小球和一个矩形框，让小球在框内自由运动，并且碰到框的边缘时会反弹。实现的主要思路是通过定时器不断更新小球的位置，并且判断小球是否碰到了框的边缘，如果碰到了就改变小球的运动方向。下面是一个简单的实现代码：

import tkinter as tk

class Ball:
    def __init__(self, canvas, color, size):
        self.canvas = canvas
        self.id = canvas.create_oval(10, 10, size, size, fill=color)
        self.canvas.move(self.id, 245, 100)
        self.xspeed = 3
        self.yspeed = -3
        self.canvas_width = self.canvas.winfo_width()
        self.canvas_height = self.canvas.winfo_height()

    def draw(self):
        self.canvas.move(self.id, self.xspeed, self.yspeed)
        pos = self.canvas.coords(self.id)
        if pos[1] <= 0:
            self.yspeed = 3
        if pos[3] >= self.canvas_height:
            self.yspeed = -3
        if pos[0] <= 0:
            self.xspeed = 3
        if pos[2] >= self.canvas_width:
            self.xspeed = -3

def main():
    tkobj = tk.Tk()
    tkobj.title("Ball Game")
    canvas = tk.Canvas(tkobj, width=500, height=400, bd=0, highlightthickness=0)
    canvas.pack()
    ball = Ball(canvas, 'red', 50)
    while True:
        ball.draw()
        tkobj.update_idletasks()
        tkobj.update()
        tkobj.after(10)

if __name__ == '__main__':
    main()