summaryrefslogtreecommitdiffstats
path: root/Demo/tkinter/guido/electrons.py
diff options
context:
space:
mode:
Diffstat (limited to 'Demo/tkinter/guido/electrons.py')
-rwxr-xr-xDemo/tkinter/guido/electrons.py91
1 files changed, 0 insertions, 91 deletions
diff --git a/Demo/tkinter/guido/electrons.py b/Demo/tkinter/guido/electrons.py
deleted file mode 100755
index 896e079..0000000
--- a/Demo/tkinter/guido/electrons.py
+++ /dev/null
@@ -1,91 +0,0 @@
-#! /usr/bin/env python3
-
-# 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
-
- # First argument is number of electrons, default 30
- if sys.argv[1:]:
- n = int(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()