__author__ = 'ChenYan' from random import randint from tkinter import * class Randball(): def __init__(self, canvas, scrnwidth, scrnheight): #初始化画布 self.canvas = canvas #初始化球的圆心坐标 self.x_pos = randint(80, int(scrnwidth)) self.y_pos = randint(80, int(scrnheight)) #球移动的距离 self.x_move = 10 self.y_move = 10 #整个屏幕的宽和高 self.scrnwidth = scrnwidth self.scrnheight = scrnheight #初始化球的半径 self.radius = randint(40, 70) #随机产生球的颜色 rc = lambda :randint(0,255) self.color = '#%02x%02x%02x' % (rc(), rc(), rc()) def create_ball(self): #计算得到用于创建球的四个坐标 x1 = self.x_pos - self.radius y1 = self.x_pos - self.radius x2 = self.x_pos + self.radius y2 = self.x_pos + self.radius #画球 self.item = self.canvas.create_oval(x1, y1, x2, y2, fill=self.color, outline=self.color) def move_ball(self): '''按指定的距离移动球，如果球碰到障碍向相反的方向移动''' self.x_pos += self.x_move self.y_pos += self.y_move if self.x_pos >= self.scrnwidth - self.radius: self.x_move = -self.x_move if self.y_pos >= self.scrnheight - self.radius: self.y_move = -self.y_move if self.x_pos < self.radius: self.x_move = abs(self.x_move) if self.y_pos < self.radius: self.y_move = abs(self.y_move) self.canvas.move(self.item, self.x_move, self.y_move) class Screensaver(): balls = [] def __init__(self, ball_nums): self.win = Tk() self.width = self.win.winfo_screenwidth() self.height = self.win.winfo_screenheight() self.win.overrideredirect(True) self.win.attributes('-alpha', 0.3) #绑定事件，有任何动作退出屏保 self.win.bind('<Any-Button>', self.exit_screensaver) self.win.bind('<Motion>', self.exit_screensaver) self.canvas = Canvas(self.win, width=self.width, height=self.height, bg='#00FFFF') self.canvas.pack() for i in range(0,ball_nums): ball = Randball(self.canvas, scrnwidth=self.width, scrnheight=self.height) ball.create_ball() self.balls.append(ball) self.run_screensaver() self.win.mainloop() def run_screensaver(self): for ball in self.balls: ball.move_ball() self.canvas.after(20, self.run_screensaver) def exit_screensaver(self, event): self.win.destroy() def main(): Screensaver(15) if __name__=='__main__': main()