symbian-qemu-0.9.1-12/python-2.6.1/Demo/tkinter/guido/electrons.py
author johnathan.white@2718R8BGH51.accenture.com
Mon, 08 Mar 2010 18:45:03 +0000
changeset 46 b6935a90ca64
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority

#! /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()