#!/usr/bin/python
# $Id: threadtest.py,v 1.2 2000/09/06 01:51:34 petli Exp $

import sys
import os

sys.path[1:1] = [os.path.join(sys.path[0], '..')]

from Xlib import display, X, threaded
import time
import thread

def redraw(win, gc):
    # win.clear_area()
    win.fill_rectangle(gc, 20, 20, 60, 60)

def blink(display, win, gc, cols):
    while 1:
	time.sleep(2)
	print 'Changing color', cols[0]
	gc.change(foreground = cols[0])
	cols = (cols[1], cols[0])
	redraw(win, gc)
	display.flush()
	
def main():
    d = display.Display()
    root = d.screen().root

    colormap = d.screen().default_colormap
    
    red = colormap.alloc_named_color("red").pixel
    blue = colormap.alloc_named_color("blue").pixel
    background = colormap.alloc_named_color("white").pixel

    window = root.create_window(100, 100, 100, 100, 1,
				X.CopyFromParent, X.InputOutput,
				X.CopyFromParent,
				background_pixel = background,
				event_mask = X.StructureNotifyMask | X.ExposureMask)
    window.map()
    
    gc = window.create_gc(foreground = red)

    thread.start_new_thread(blink, (d, window, gc, (blue, red)))

    while 1:
	event = d.next_event()
	if event.type == X.Expose:
	    if event.count == 0:
		redraw(window, gc)
	elif event.type == X.DestroyNotify:
	    sys.exit(0)

if __name__ == "__main__":
    main()
