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POWhy does X choke after I draw to the root window
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copied!<p>For background, I'm running Debian Lenny, and have tried this with both GNOME and Fluxbox.</p> <p>Anyway, I've been looking at how to draw on the desktop, and I found and tried this code here: <a href="http://blog.prashanthellina.com/2007/08/24/drawing-on-your-desktop/" rel="nofollow noreferrer">http://blog.prashanthellina.com/2007/08/24/drawing-on-your-desktop/</a></p> <p>It worked fine, except upon terminating it (by hitting control C), X loses it's ability to create new windows.</p> <p>I had thought that maybe the problem was pygame not releasing some resource, so I added in a block of code to trap the kill signal, giving me the following:</p> <pre><code>""" Run the following command in the shell before executing this script export SDL_WINDOWID=`xwininfo -root|grep "id:"|sed 's/^.*id: //'|sed 's/ (.*$//'` """ import pygame import sys import random import time import signal pygame.init() window = pygame.display.set_mode((1280, 1024)) screen = pygame.display.get_surface() def handle_sigint(signum, frame): """I want to ensure resources are released before bailing.""" print("SIGINT received."); pygame.display.quit() pygame.quit() sys.exit(0) # Set handler to catch C^C Interupts signal.signal(signal.SIGINT, handle_sigint) while 1: for event in pygame.event.get(): if event.type == pygame.QUIT: sys.exit(0) x = random.choice(range(640)) y = random.choice(range(480)) radius = random.choice(range(100)) col_r = random.choice(range(255)) col_g = random.choice(range(255)) col_b = random.choice(range(255)) time.sleep(.03) rect = pygame.draw.circle(screen, (col_r, col_g, col_b), (x,y), radius) pygame.display.update(rect) </code></pre> <p>And so I tried again. The print statement in the interrupt handler tells me that the handler does run when I quit, but I still have the same problem. And even more interestingly, X has no problems while it's running. It's only after terminating it.</p> <p>Might anybody out there have any idea what's happening, and what I can do to fix the code so it doesn't wreck my X session? Thanks in advance.</p>

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