--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Demo/tkinter/matt/pong-demo-1.py	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,54 @@
+from Tkinter import *
+
+import string
+
+
+class Pong(Frame):
+    def createWidgets(self):
+        self.QUIT = Button(self, text='QUIT', foreground='red',
+                           command=self.quit)
+        self.QUIT.pack(side=LEFT, fill=BOTH)
+
+        ## The playing field
+        self.draw = Canvas(self, width="5i", height="5i")
+
+        ## The speed control for the ball
+        self.speed = Scale(self, orient=HORIZONTAL, label="ball speed",
+                           from_=-100, to=100)
+
+        self.speed.pack(side=BOTTOM, fill=X)
+
+        # The ball
+        self.ball = self.draw.create_oval("0i", "0i", "0.10i", "0.10i",
+                                          fill="red")
+        self.x = 0.05
+        self.y = 0.05
+        self.velocity_x = 0.3
+        self.velocity_y = 0.5
+
+        self.draw.pack(side=LEFT)
+
+    def moveBall(self, *args):
+        if (self.x > 5.0) or (self.x < 0.0):
+            self.velocity_x = -1.0 * self.velocity_x
+        if (self.y > 5.0) or (self.y < 0.0):
+            self.velocity_y = -1.0 * self.velocity_y
+
+        deltax = (self.velocity_x * self.speed.get() / 100.0)
+        deltay = (self.velocity_y * self.speed.get() / 100.0)
+        self.x = self.x + deltax
+        self.y = self.y + deltay
+
+        self.draw.move(self.ball,  "%ri" % deltax, "%ri" % deltay)
+        self.after(10, self.moveBall)
+
+    def __init__(self, master=None):
+        Frame.__init__(self, master)
+        Pack.config(self)
+        self.createWidgets()
+        self.after(10, self.moveBall)
+
+
+game = Pong()
+
+game.mainloop()