python tkinter实现屏保程序

本文实例为大家分享了python tkinter实现屏保程序的具体代码，供大家参考，具体内容如下

该脚本摘录自：2014年辛星tkinter教程第二版

#!/usr/bin/env python

from Tkinter import *
from random import randint

class RandomBall(object):
 def __init__(self, canvas, screenwidth, screenheight):
   self.canvas = canvas
   self.xpos = randint(10, int(screenwidth))
   self.ypos = randint(10, int(screenheight))
   self.xspeed = randint(6, 12)
   self.yspeed = randint(6, 12)
   self.screenwidth = screenwidth
   self.screenheight = screenheight
   self.radius = randint(40, 70)
   color = lambda : randint(0, 255)
   self.color = '#％02x％02x％02x' ％ (color(), color(), color())

def create_ball(self):
   x1 = self.xpos - self.radius
   y1 = self.ypos - self.radius
   x2 = self.xpos + self.radius
   y2 = self.ypos + self.radius
   self.itm = self.canvas.create_oval(x1, y1, x2, y2, fill=self.color,
           outline=self.color)

def move_ball(self):
   self.xpos += self.xspeed
   self.ypos += self.yspeed
   if self.ypos >= self.screenheight - self.radius:
     self.yspeed = -self.yspeed
   if self.ypos <= self.radius:
     self.yspeed = abs(self.yspeed)
   if self.xpos >= self.screenwidth - self.radius or self.xpos <= self.radius:
     self.xspeed = -self.xspeed
   self.canvas.move(self.itm, self.xspeed, self.yspeed)

class ScreenSaver:
 def __init__(self, num_balls):
   self.balls = []
   self.root = Tk()
   w, h = self.root.winfo_screenwidth(), self.root.winfo_screenheight()
   self.root.overrideredirect(1)
   self.root.attributes('-alpha', 0.3)
   self.root.bind('<Key>', self.myquit)
   self.root.bind('<Motion>', self.myquit)
   self.canvas = Canvas(self.root, width=w, height=h)
   self.canvas.pack()
   for i in range(num_balls):
     ball = RandomBall(self.canvas, screenwidth=w, screenheight=h)
     ball.create_ball()
     self.balls.append(ball)
   self.run_screen_saver()
   self.root.mainloop()

def run_screen_saver(self):
   for ball in self.balls:
     ball.move_ball()
   self.canvas.after(50, self.run_screen_saver)

def myquit(self, event):
   self.root.destroy()

if __name__ == "__main__":
 ScreenSaver(18)

来源：https://blog.csdn.net/wjciayf/article/details/50679746