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kete: better handling of clean up of connection/disconnection of signals 

If stop() is called more than once, we might try to disconnect the
signals more than once, which raises some errors.
Better having one central place that handles the disconnect properly.
This commit is contained in:
Benjamin Tissoires 2018-02-13 13:58:33 +01:00
parent 30620dfbf0
commit d8808e144f
1 changed files with 28 additions and 8 deletions
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36
tools/tuhi-kete.py
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@ -381,6 +381,24 @@ class Worker(GObject.Object):
def __init__(self, manager, args=None):
GObject.GObject.__init__(self)
self.manager = manager
self._connected_signals = {}
def oject_connect(self, obj, signal, callback):
if signal in self._connected_signals:
# FIXME: this should be an exception
logger.error(f'signal {signal} is already set, ignoring')
return
s = obj.connect(signal, callback)
self._connected_signals[signal] = (obj, s)
def manager_connect(self, signal, callback):
self.oject_connect(self.manager, signal, callback)
def cleanup(self):
for obj, signal in self._connected_signals.values():
obj.disconnect(signal)
self._connected_signals = {}
def run(self):
pass
@ -392,8 +410,8 @@ class Worker(GObject.Object):
class Searcher(Worker):
def __init__(self, manager, args):
super(Searcher, self).__init__(manager)
self.s1 = self.manager.connect('notify::searching', self._on_notify_search)
self.s2 = self.manager.connect('unregistered-device', self._on_unregistered_device)
self.manager_connect('notify::searching', self._on_notify_search)
self.manager_connect('unregistered-device', self._on_unregistered_device)
def run(self):
if self.manager.searching:
@ -408,8 +426,7 @@ class Searcher(Worker):
logger.debug('Stopping search')
self.manager.stop_search()
self.manager.disconnect(self.s1)
self.manager.disconnect(self.s2)
self.cleanup()
def _on_notify_search(self, manager, pspec):
if not manager.searching:
@ -434,6 +451,9 @@ class Listener(Worker):
# FIXME: this should be an exception
return
def device_connect(self, signal, callback):
self.oject_connect(self.device, signal, callback)
def run(self):
if self.device is None:
return
@ -446,15 +466,15 @@ class Listener(Worker):
return
logger.debug(f'{self.device}: starting listening')
self.s1 = self.device.connect('notify::listening', self._on_device_listening)
self.s2 = self.device.connect('notify::drawings-available', self._on_drawings_available)
self.device_connect('notify::listening', self._on_device_listening)
self.device_connect('notify::drawings-available', self._on_drawings_available)
self.device.start_listening()
def stop(self):
logger.debug(f'{self.device}: stopping listening')
self.device.stop_listening()
self.device.disconnect(self.s1)
self.device.disconnect(self.s2)
self.cleanup()
def _on_device_listening(self, device, pspec):
if self.device.listening: