Demo/tkinter/matt/pong-demo-1.py

   1 from Tkinter import *
   2
   3 import string
   4
   5
   6 class Pong(Frame):
   7     def createWidgets(self):
   8         self.QUIT = Button(self, {'text': 'QUIT',
   9                                   'fg': 'red',
  10                                   'command': self.quit})
  11         self.QUIT.pack({'side': 'left', 'fill': 'both'})
  12
  13         ## The playing field
  14         self.draw = Canvas(self, {"width" : "5i", "height" : "5i"})
  15
  16         ## The speed control for the ball
  17         self.speed = Scale(self, {"orient":  "horiz",
  18                                   "label" : "ball speed",
  19                                   "from" : -100,
  20                                   "to" : 100})
  21
  22         self.speed.pack({'side': 'bottom', "fill" : "x"})
  23
  24         # The ball
  25         self.ball = self.draw.create_oval("0i", "0i", "0.10i", "0.10i", {"fill" : "red"})
  26         self.x = 0.05
  27         self.y = 0.05
  28         self.velocity_x = 0.3
  29         self.velocity_y = 0.5
  30
  31         self.draw.pack({'side': 'left'})
  32
  33
  34     def moveBall(self, *args):
  35         if (self.x > 5.0) or (self.x < 0.0):
  36             self.velocity_x = -1.0 * self.velocity_x
  37         if (self.y > 5.0) or (self.y < 0.0):
  38             self.velocity_y = -1.0 * self.velocity_y
  39
  40         deltax = (self.velocity_x * self.speed.get() / 100.0)
  41         deltay = (self.velocity_y * self.speed.get() / 100.0)
  42         self.x = self.x + deltax
  43         self.y = self.y + deltay
  44
  45         self.draw.move(self.ball,  `deltax` + "i", `deltay` + "i")
  46         self.after(10, self.moveBall)
  47
  48
  49
  50     def __init__(self, master=None):
  51         Frame.__init__(self, master)
  52         Pack.config(self)
  53         self.createWidgets()
  54         self.after(10, self.moveBall)
  55
  56
  57 game = Pong()
  58
  59 game.mainloop()