from tkinter import *
from tkinter import messagebox
import random
import time
from PIL import Image, ImageTk
import sys
 
 
class Game:
  def __init__(self):
    self.tk = Tk()
    self.times = 0
    sw = self.tk.winfo_screenwidth()
    sh = self.tk.winfo_screenheight()
    image = Image.open(r'02.jpg')
    background_image = ImageTk.PhotoImage(image)
    ww = background_image.width()
    wh = background_image.height()
    x = (sw-ww)/2
    y = (sh-wh)/2
    self.tk.geometry("%dx%d+%d+%d" % (ww, wh, x, y))
    self.tk.title('欢迎进入弹弹弹')
    background_label = Label(self.tk, image=background_image)
    background_label.place(x=0, y=0, relwidth=1, relheight=1)
    self.tk.resizable(False, False)
    self.tk.wm_attributes("-topmost", 1) # at top
    btn1 = Button(self.tk, text='减少难度', background='#FFFF67',
           activebackground='#3EC23B', command=self.test1)
    btn2 = Button(self.tk, text='增加难度', background='#FFFF67',
           activebackground='#3EC23B', command=self.test2)
 
    btn1.place(x=380, y=10, width=80, height=30)
    btn2.place(x=500, y=10, width=80, height=30)
    self.canvas = Canvas(self.tk, width=500, height=400,
               bd=0, highlightthickness=0, background='#FFFFFF')
    self.canvas.place(x=190, y=90, width=500, height=400)
 
    self.tk.update()
    self.xunhuan()
 
  def xunhuan(self):
    try:
      paddle = Paddle(self.canvas, 'green', 100)
      ball = Ball(self.canvas, paddle, '#D11C43', 0)
      while True:
        if ball.hit_bottom == False:
          ball.draw()
          paddle.draw()
        else:
          b = messagebox.askyesno(
            '失败', message="您的分数为：" + str(ball.score)+"\n是否重新开始游戏")
          if bool(b) is True:
            paddle.canvas.delete(paddle.id)
            self.sever()
          else:
            sys.exit()
        self.tk.update_idletasks()
        self.tk.update()
        time.sleep(0.01+self.times)
    except:
      sys.exit('游戏已退出!')
 
  def sever(self):
    self.xunhuan()
 
  def test1(self):
    self.times += 0.001
 
  def test2(self):
    self.times -= 0.001
 
 
class Ball:
  def __init__(self, canvas, paddle, color, score):
    self.score = 0
    self.canvas = canvas
    self.paddle = paddle
    self.id = canvas.create_oval(
      20, 20, 35, 35, fill=color, outline='green')
    self.canvas.move(self.id, 245, 100)
    startx = [-3, -2, -1, 1, 2, 3]
    random.shuffle(startx)
    self.x = startx[0]
    self.y = -3
    self.canvas_height = self.canvas.winfo_height()
    self.canvas_width = self.canvas.winfo_width()
    self.hit_bottom = False
    b = messagebox.askyesno('game', '游戏是否开始"<Key-Left>", self.turn_left)
    self.canvas.bind_all("<Key-Right>", self.turn_right)
 
  def draw(self):
    pos = self.canvas.coords(self.id)
    if pos[0] + self.x >= 0 and pos[2] + self.x <= self.canvas_width:
      self.canvas.move(self.id, self.x, 0)
 
  def turn_left(self, event):
    self.x = -4
 
  def turn_right(self, event):
    self.x = 4
 
 
def main():
  game = Game()
 
 
if __name__ == '__main__':
  main()