class MediaKeyListener(BaseXListener):
"""
Thread that listens to mouse buttons presses.
"""
def run(self):
self.listen(device_events=(X.KeyPress, X.KeyRelease))
def processEvent(self, event):
if event.detail not in [121, 122, 123]:
return
if event.type == X.KeyPress:
if not self.volume_modifier.is_alive():
self.volume_modifier = VolumeModifierThread(self.volume)
if event.detail == 122:
self.volume_modifier.delta = -3
elif event.detail == 123:
self.volume_modifier.delta = +3
elif event.detail == 121:
self.volume_modifier.toggle_mute()
self.volume_modifier.stop()
if not self.volume_modifier.is_alive() and \
event.detail in [122, 123]:
self.volume_modifier.start()
elif event.type == X.KeyRelease:
self.stop()
class MouseButtonListener(BaseXListener):
"""
Thread that listens to mouse buttons presses.
"""
def run(self):
self.listen(device_events=(X.ButtonPress, X.ButtonRelease))
def processEvent(self, event):
if event.detail not in [10, 13]:
return
if event.type == X.ButtonPress:
if not self.volume_modifier.is_alive():
self.volume_modifier = VolumeModifierThread(self.volume)
if event.detail == 10:
self.volume_modifier.delta = -3
elif event.detail == 13:
self.volume_modifier.delta = +3
if not self.volume_modifier.is_alive():
self.volume_modifier.start()
elif event.type == X.ButtonRelease:
self.stop()
class BaseXListener(threading.Thread):
"""
A generic thread to listen to X events.
`processEvent(event)` needs to be overridden by subclases
"""
volume_modifier = None
display = None
volume = None
def __init__(self, notification):
super(BaseXListener, self).__init__()
self.volume_modifier = VolumeModifierThread(notification)
self.volume = notification
self.display = display.Display()
r = self.display.record_get_version(0, 0)
print("RECORD extension version {}.{}".format(r.major_version,
r.minor_version))
def listen(self, device_events=(0, 0)):
ctx = self.display.record_create_context(
0,
[record.AllClients],
[{
'core_requests': (0, 0),
'core_replies': (0, 0),
'ext_requests': (0, 0, 0, 0),
'ext_replies': (0, 0, 0, 0),
'delivered_events': (0, 0),
'device_events': device_events,
'errors': (0, 0),
'client_started': False,
'client_died': False,
}])
# Enable the context; this only returns after a call to
# record_disable_context, while calling the callback function in the
# meantime
self.display.record_enable_context(ctx, self.callback)
# Finally free the context
self.display.record_free_context(ctx)
def callback(self, reply):
if reply.category != record.FromServer:
return
if reply.client_swapped:
print("* received swapped protocol data, cowardly ignored")
return
if not len(reply.data) or ord(reply.data[0]) < 2:
return # not an event
data = reply.data
while len(data):
event, data = rq.EventField(None).parse_binary_value(
data, self.display.display, None, None)
self.processEvent(event)
def stop(self):
if self.volume_modifier.is_alive():
self.volume_modifier.stop()