趣学PYTHON第2部分弹球实例

趣学PYTHON第2部分弹球实例

#!/usr/bin/env python
#coding:utf-8

from Tkinter import *
import random
import time

class Ball:
def __init__(self,canvas,paddle,color):
self.canvas =canvas
self.paddle = paddle
self.id=canvas.create_oval(10,10,25,25,fill=color)
self.canvas.move(self.id,245,100)
starts =[-3,-2,-1,1,2,3]
random.shuffle(starts)
self.x = starts[0]
self.y = -3
self.canvas_height =self.canvas.winfo_height()
self.canvas_width = self.canvas.winfo_width()
self.hit_bottom = False

def hit_paddle(self,pos):
paddle_pos = self.canvas.coords(self.paddle.id)
if pos[2]>=paddle_pos[0] and pos[0]<=paddle_pos[2]:
if pos[3]>=paddle_pos[1] and pos[3]<=paddle_pos[3]:
return True
return False

def draw(self):
self.canvas.move(self.id,self.x,self.y)
pos = self.canvas.coords(self.id)
if pos[1]<=0:
self.y =2
if pos[3]>=self.canvas_height:
self.hit_bottom = True
if self.hit_paddle(pos) == True:
self.y=-2
if pos[0]<=0:
self.x =2
if pos[2]>=self.canvas_width:
self.x =-2

class Paddle:
def __init__(self,canvas,color):
self.canvas = canvas
self.id = canvas.create_rectangle(0,0,100,10,fill =color)
self.canvas.move(self.id,200,300)
self.x = 0
self.canvas_width = self.canvas.winfo_width()
self.canvas.bind_all('<KeyPress-Left>',self.turn_left)
self.canvas.bind_all('<KeyPress-Right>',self.turn_right)
def draw(self):
self.canvas.move(self.id,self.x,0)
pos = self.canvas.coords(self.id)
if pos[0] <= 0:
self.x = 0
elif pos[2] >= self.canvas_width:
self.x = 0

def turn_left(self,evt):
self.x= -3

def turn_right(self,evt):
self.x= 3

tk = Tk()
tk.title("game")
tk.resizable(0,0)
#窗口大小不可以调整（0,0）
tk.wm_attributes("-topmost",1)
#告诉tkinter把包含画布的窗口放到其它窗口之前。
canvas=Canvas(tk,width=500,height=500,bd=0,highlightthickness=0)
#确保画布之外没有边框，

canvas.pack()
tk.update()

paddle = Paddle(canvas,'blue')

ball=Ball(canvas,paddle,'red')

while 1:
if ball.hit_bottom == False:
ball.draw()
paddle.draw()
tk.update_idletasks()
tk.update()
time.sleep(0.01)
pass
tk.mainloop()
我用的是python2.7,所以最开始from Tkinter中的T要大写，3.x的版本用小写。