Trouble using delegates/protocols

[Rasmus Kreiner]

Hi List,

I'm trying to use the AVAudioPlayerDelegate-protocol in an app. If I compare my method with the delgate.py file in the example directory (https://github.com/kivy/pyobjus/blob/master/examples/delegate.py) it looks like I'm doing exactly what i'm is supposed to, but somehow the two functions audioPlayerBeginInterruption and audioPlayerDidFinishPlaying are not called. Does any of you Hawkeye type of people see what seems to be the trouble:

from kivy.event import EventDispatcher
from kivy.properties import StringProperty, NumericProperty, OptionProperty, BooleanProperty
from kivy.clock import Clock
from pyobjus import autoclass, protocol
from pyobjus.dylib_manager import load_framework, INCLUDE

load_framework(INCLUDE.AVFoundation)
AVAudioPlayer = autoclass("AVAudioPlayer")
AVAudioSession = autoclass("AVAudioSession")
MPRemoteCommandCenter = autoclass("MPRemoteCommandCenter")
MPRemoteCommand = autoclass("MPRemoteCommand")
MPNowPlayingInfoCenter = autoclass("MPNowPlayingInfoCenter")

NSURL = autoclass("NSURL")
NSString = autoclass("NSString")
UIApplication = autoclass("UIApplication")


class SoundLoader(EventDispatcher):
 source = StringProperty("")
 volume = NumericProperty(1.)
 state = OptionProperty('pause', options=('stop', 'play', 'pause'))
 loop = BooleanProperty(False)
 _avplayer = None
 _commandCenter = None

 def __init__(self, *args,**kwargs):
 super(SoundLoader, self).__init__(**kwargs)
 self.state = 'pause'
 self.register_event_type('on_play')
 self.register_event_type('on_stop')
 self.register_event_type('on_pause')
 self.register_event_type('on_finish')

 def play(self):
 self.state = 'play'
 self._avplayer.prepareToPlay()
 self._avplayer.play(2)
 self.dispatch('on_play')

 def stop(self):
 if not self._avplayer:
 return
 print ("Trying to stop file: {}".format(self.source))
 self.state = 'stop'
 self._avplayer.stop()
 self.dispatch('on_stop')

 def pause(self):
 self.state = 'pause'
 self.stop()
 self.dispatch('on_pause')

 def load(self, filename):
 self.unload()
 fn = NSString.alloc().initWithUTF8String_(str(filename))
 url = NSURL.alloc().initFileURLWithPath_(fn)
 self._avplayer = AVAudioPlayer.alloc().initWithContentsOfURL_error_(
 url, None)
 self._avplayer.prepareToPlay()
 self._avplayer.delegate = self._avplayer
 UIApplication.sharedApplication().beginReceivingRemoteControlEvents()

# # TODO KOMMET HERTIL ---> Skal have fundet frem til addTargets og handler paa self._avplayer

 def unload(self):
 self.stop()
 self._avplayer = None
 try:
 self.keepAliveThread.join()
 self.killObject = False
 except:
 pass

 def _get_length(self, dt=1):
 if not self._avplayer:
 return
 self.length = self._avplayer.duration
 return self.length

 def get_pos(self, dt=1):
 if self._avplayer.isPlaying():
 self.currentPos = self._avplayer.currentTime
 if self.currentPos > (self._get_length() - .1):
 self.dispatch('on_finish')
 return self.currentPos

 def seek(self, position):
 print position
 self._avplayer.currentTime = position

 def on_play(self):
 self.state = "play"
 self.clock = Clock.schedule_interval(self.get_pos,1)

 def on_stop(self):
 try: ##TODO TRACKING MECHANISM STOP
 self.clock.cancel()
 except:
 pass
 self.state = "stop"

 def on_pause(self):
 self.state = "pause"

 def on_finish(self):
 pass

 @protocol('AVAudioPlayerDelegate')
 def audioPlayerBeginInterruption(self):
 print ("Im here at the protocol - Interrupted")

 @protocol('AVAudioPlayerDelegate')
 def audioPlayerDidFinishPlaying(self, successfully):
 print ("Im here at the protocol - Finished ")
 print successfully

class SoundSessionManager():
 def __init__(self, *args, **kwargs):
 self._avAudioSession = AVAudioSession.sharedInstance()
 category_playback = NSString.alloc().initWithUTF8String_(str("AVAudioSessionCategoryPlayback"))
 self._avAudioSession.setCategory_withOptions_error_(category_playback, 0, [])