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', foreground='red',
   9                            command=self.quit)
  10         self.QUIT.pack(side=LEFT, fill=BOTH)
  11
  12         ## The playing field
  13         self.draw = Canvas(self, width="5i", height="5i")
  14
  15         ## The speed control for the ball
  16         self.speed = Scale(self, orient=HORIZONTAL, label="ball speed",
  17                            from_=-100, to=100)
  18
  19         self.speed.pack(side=BOTTOM, fill=X)
  20
  21         # The ball
  22         self.ball = self.draw.create_oval("0i", "0i", "0.10i", "0.10i",
  23                                           fill="red")
  24         self.x = 0.05
  25         self.y = 0.05
  26         self.velocity_x = 0.3
  27         self.velocity_y = 0.5
  28
  29         self.draw.pack(side=LEFT)
  30
  31     def moveBall(self, *args):
  32         if (self.x > 5.0) or (self.x < 0.0):
  33             self.velocity_x = -1.0 * self.velocity_x
  34         if (self.y > 5.0) or (self.y < 0.0):
  35             self.velocity_y = -1.0 * self.velocity_y
  36
  37         deltax = (self.velocity_x * self.speed.get() / 100.0)
  38         deltay = (self.velocity_y * self.speed.get() / 100.0)
  39         self.x = self.x + deltax
  40         self.y = self.y + deltay
  41
  42         self.draw.move(self.ball,  `deltax` + "i", `deltay` + "i")
  43         self.after(10, self.moveBall)
  44
  45     def __init__(self, master=None):
  46         Frame.__init__(self, master)
  47         Pack.config(self)
  48         self.createWidgets()
  49         self.after(10, self.moveBall)
  50
  51
  52 game = Pong()
  53
  54 game.mainloop()