class MidiMonitor(object):
def __init__(self, connect=None, start=True, app=None):
self.events = EmitterGroup(source=self,
start=Event,
stop=Event,
midiIn=Event)
if app is None:
self._app = use_app(call_reuse=False)
elif isinstance(app, Application):
self._app = app
elif isinstance(app, string_types):
self._app = Application(app)
else:
raise ValueError('Invalid value for app %r' % app)
self._running = False
if connect is not None:
self.connect(connect)
if start:
self.start()
@property
def running(self):
return self._running
def start(self):
if self.running:
return # don't do anything if already running
port = sys.argv[1] if len(sys.argv) > 1 else None
try:
self.midiin = rtmidi.MidiIn(name="game")
available_ports = self.midiin.get_ports()
if available_ports:
self.midiin.open_port(0)
else:
self.midiin.open_virtual_port("My virtual output")
except (EOFError, KeyboardInterrupt):
sys.exit()
self.midiInputHandler = MidiInputHandler(self, port)
self.midiin.set_callback(self.midiInputHandler)
self._running = True
self.events.start(type='midi_start')
print(self.midiin)
def stop(self):
self.events.stop(type='midi_stop')
def _midiIn(self, message):
if not self.running:
return
if message[0] == 144:
print(message)
self.events.midiIn(type='midi_in', message=message)
def connect(self, callback):
return self.events.midiIn.connect(callback)
def disconnect(self, callback=None):
return self.events.midiIn.disconnect(callback)
class Timer(object):
"""Timer used to schedule events in the future or on a repeating schedule.
"""
def __init__(self, interval=0.0, connect=None, iterations=-1, start=False, app=None):
self.events = EmitterGroup(source=self,
start=Event,
stop=Event,
timeout=Event)
#self.connect = self.events.timeout.connect
#self.disconnect = self.events.timeout.disconnect
# Get app instance and make sure that it has an associated backend
self._app = vispy.app.default_app if app is None else app
self._app.use()
# Instantiate the backed with the right class
self._backend = self._app.backend_module.TimerBackend(self)
self._interval = interval
self._running = False
self._last_emit_time = None
self.iter_count = 0
self.max_iterations = iterations
if connect is not None:
self.connect(connect)
if start:
self.start()
@property
def app(self):
""" The vispy Application instance on which this Timer is based.
"""
return self._app
@property
def interval(self):
return self._interval
@interval.setter
def interval(self, val):
self._interval = val
if self.running:
self.stop()
self.start()
@property
def running(self):
return self._running
def start(self, interval=None, iterations=None):
"""Start the timer.
A timeout event will be generated every *interval* seconds.
If *interval* is None, then self.interval will be used.
If *iterations* is specified, the timer will stop after
emitting that number of events. If unspecified, then
the previous value of self.iterations will be used. If the value is
negative, then the timer will continue running until stop() is called.
"""
self.iter_count = 0
if interval is not None:
self.interval = interval
if iterations is not None:
self.max_iterations = iterations
self._backend._vispy_start(self.interval)
self._running = True
self._last_emit_time = None
self.events.start(type='timer_start')
def stop(self):
"""Stop the timer."""
self._backend._vispy_stop()
self._running = False
self.events.stop(type='timer_stop')
# use timer.app.run() and .quit() instead.
#def run_event_loop(self):
#"""Execute the event loop for this Timer's backend.
#"""
#return self._backend._vispy_run()
#def quit_event_loop(self):
#"""Exit the event loop for this Timer's backend.
#"""
#return self._backend._vispy_quit()
@property
def native(self):
""" The native timer on which this Timer is based.
"""
return self._backend._vispy_get_native_timer()
def _timeout(self, *args):
# called when the backend timer has triggered.
if not self.running:
return
if self.max_iterations >= 0 and self.iter_count >= self.max_iterations:
self.stop()
return
# compute dt since last event
now = precision_time()
if self._last_emit_time is None:
dt = None
else:
dt = now - self._last_emit_time
self._last_emit_time = now
self.events.timeout(type='timer_timeout', iteration=self.iter_count, dt=dt)
self.iter_count += 1
def connect(self, callback):
""" Alias for self.events.timeout.connect() """
return self.events.timeout.connect(callback)
def disconnect(self, callback=None):
""" Alias for self.events.timeout.disconnect() """
return self.events.timeout.disconnect(callback)
