|
- __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()
复制代码
|
|