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Python Source  |  2000-06-23  |  1.3 KB  |  55 lines
  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()
  55.