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  • python写的屏保程序

    __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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  • 原文地址:https://www.cnblogs.com/jsben/p/4717459.html
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