def run(self):
while 1:
if self.stopping:
hg.cvDestroyAllWindows()
return
try:
# Check for a new command request
try:
(self.func,
self.args,
self.kwargs) = self.cmds.get_nowait()
except Empty:
self.func = None
# Execute function if requested
if self.func:
try:
rc = self.func(*self.args, **self.kwargs)
except Exception, e:
rc = None
sys.stderr.write('ImageThread exception - ignoring:')
traceback.print_exc()
if self.synchronized:
self.result.put(rc)
# Service the OpenCV event loop - buffer recent keys for
# possible use by the foreground thread, but bound it to a
# a small number in case WaitKey isn't called by the thread.
#
# Note: This is very CPU-inefficient if we haven't created
# a window, so only bother if we've seen one created
if self._have_windows:
rc = hg.cvWaitKey(5)
if rc >= 0:
if self.keys.qsize() >= 10:
self.keys.get()
self.keys.put(rc)
else:
# Yield CPU to prevent CPU burn
time.sleep(0.01)
except:
def DestroyAllWindows(self):
hg.cvDestroyAllWindows()