--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Demo/turtle/tdemo_minimal_hanoi.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,76 @@
+#!/usr/bin/python
+""" turtle-example-suite:
+
+ tdemo_minimal_hanoi.py
+
+A minimal 'Towers of Hanoi' animation:
+A tower of 6 discs is transferred from the
+left to the right peg.
+
+An imho quite elegant and concise
+implementation using a tower class, which
+is derived from the built-in type list.
+
+Discs are turtles with shape "square", but
+stretched to rectangles by shapesize()
+ ---------------------------------------
+ To exit press STOP button
+ ---------------------------------------
+"""
+from turtle import *
+
+class Disc(Turtle):
+ def __init__(self, n):
+ Turtle.__init__(self, shape="square", visible=False)
+ self.pu()
+ self.shapesize(1.5, n*1.5, 2) # square-->rectangle
+ self.fillcolor(n/6., 0, 1-n/6.)
+ self.st()
+
+class Tower(list):
+ "Hanoi tower, a subclass of built-in type list"
+ def __init__(self, x):
+ "create an empty tower. x is x-position of peg"
+ self.x = x
+ def push(self, d):
+ d.setx(self.x)
+ d.sety(-150+34*len(self))
+ self.append(d)
+ def pop(self):
+ d = list.pop(self)
+ d.sety(150)
+ return d
+
+def hanoi(n, from_, with_, to_):
+ if n > 0:
+ hanoi(n-1, from_, to_, with_)
+ to_.push(from_.pop())
+ hanoi(n-1, with_, from_, to_)
+
+def play():
+ onkey(None,"space")
+ clear()
+ hanoi(6, t1, t2, t3)
+ write("press STOP button to exit",
+ align="center", font=("Courier", 16, "bold"))
+
+def main():
+ global t1, t2, t3
+ ht(); penup(); goto(0, -225) # writer turtle
+ t1 = Tower(-250)
+ t2 = Tower(0)
+ t3 = Tower(250)
+ # make tower of 6 discs
+ for i in range(6,0,-1):
+ t1.push(Disc(i))
+ # prepare spartanic user interface ;-)
+ write("press spacebar to start game",
+ align="center", font=("Courier", 16, "bold"))
+ onkey(play, "space")
+ listen()
+ return "EVENTLOOP"
+
+if __name__=="__main__":
+ msg = main()
+ print msg
+ mainloop()