python写的屏保程序

hasky · 发表于 2016-5-30 17:38

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__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()
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