def test_void(self):
p = Params()
exitparam = p.void('exit')
self.assertEqual(exitparam.to_dict()['type'], 'v')
exits = []
exitparam.onchange(exits.append)
self.assertEqual(len(exits), 0)
exitparam.set(None)
self.assertEqual(len(exits), 1)
exitparam.set('foo')
self.assertEqual(len(exits), 2)
exitparam.trigger()
self.assertEqual(len(exits), 3)
def test_void_argumentless_callback(self):
p = Params()
exitparam = p.void('exit')
self.assertEqual(exitparam.to_dict()['type'], 'v')
exits = []
def func():
print('func: {}'.format(len(exits)))
exits.append('func')
exitparam.ontrigger(func)
self.assertEqual(len(exits), 0)
exitparam.trigger()
self.assertEqual(len(exits), 1)
self.assertEqual(exits[-1], 'func')
async def main(self):
# Params
params = Params()
self.imageParam = params.image('image')
fps = params.float('fps', min=0.0, max=5.0)
snap = params.void('snap')
fps.set(0.0)
snap.ontrigger(self.update)
logger.info(f'Starting websocket server on port: {self.port}')
wss = WebsocketServer(Server(params),
host=self.host,
port=self.port,
start=False)
await wss.start_async()
logger.info(f'Starting webcam')
self.cap = cv2.VideoCapture(0)
nextTime = time.time()
try:
while True:
t = time.time()
hz = fps.val()
if t >= nextTime and hz > 0.00001:
self.update()
nextTime = t + 1.0 / hz
await asyncio.sleep(0.05)
key = cv2.waitKey(10) & 0xFF
if key == 27 or key == ord('q'): # escape or Q
break
if key == ord('s'):
self.update()
except KeyboardInterrupt:
print("Received Ctrl+C... initiating exit")
print('Stopping...')
wss.stop()