symbian-qemu-0.9.1-12/python-2.6.1/Demo/tkinter/guido/electrons.py
author Gareth Stockwell <gareth.stockwell@accenture.com>
Wed, 22 Sep 2010 15:40:40 +0100
branchgraphics-phase-3
changeset 111 345f1c88c950
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Fixes to syborg-graphicswrapper.vcproj These changes allow syborg-graphicswrapper to link against the hostthreadadapter and khronosapiwrapper libraries built by the graphics.simulator component. The .vcproj file uses relative paths, which requires that the following three packages are laid out as follows: os/ graphics adapt/ graphics.simulator qemu

#! /usr/bin/env python

# Simulate "electrons" migrating across the screen.
# An optional bitmap file in can be in the background.
#
# Usage: electrons [n [bitmapfile]]
#
# n is the number of electrons to animate; default is 30.
#
# The bitmap file can be any X11 bitmap file (look in
# /usr/include/X11/bitmaps for samples); it is displayed as the
# background of the animation.  Default is no bitmap.

from Tkinter import *
import random


# The graphical interface
class Electrons:

    # Create our objects
    def __init__(self, n, bitmap = None):
        self.n = n
        self.tk = tk = Tk()
        self.canvas = c = Canvas(tk)
        c.pack()
        width, height = tk.getint(c['width']), tk.getint(c['height'])

        # Add background bitmap
        if bitmap:
            self.bitmap = c.create_bitmap(width/2, height/2,
                                          bitmap=bitmap,
                                          foreground='blue')

        self.pieces = []
        x1, y1, x2, y2 = 10,70,14,74
        for i in range(n):
            p = c.create_oval(x1, y1, x2, y2, fill='red')
            self.pieces.append(p)
            y1, y2 = y1 +2, y2 + 2
        self.tk.update()

    def random_move(self, n):
        c = self.canvas
        for p in self.pieces:
            x = random.choice(range(-2,4))
            y = random.choice(range(-3,4))
            c.move(p, x, y)
        self.tk.update()

    # Run -- allow 500 movemens
    def run(self):
        try:
            for i in range(500):
                self.random_move(self.n)
        except TclError:
            try:
                self.tk.destroy()
            except TclError:
                pass


# Main program
def main():
    import sys, string

    # First argument is number of electrons, default 30
    if sys.argv[1:]:
        n = string.atoi(sys.argv[1])
    else:
        n = 30

    # Second argument is bitmap file, default none
    if sys.argv[2:]:
        bitmap = sys.argv[2]
        # Reverse meaning of leading '@' compared to Tk
        if bitmap[0] == '@': bitmap = bitmap[1:]
        else: bitmap = '@' + bitmap
    else:
        bitmap = None

    # Create the graphical objects...
    h = Electrons(n, bitmap)

    # ...and run!
    h.run()


# Call main when run as script
if __name__ == '__main__':
    main()