private void HandleRemoteControlEvent(UIEventSubtype eventType)
{
switch (eventType)
{
case UIEventSubtype.RemoteControlPlay:
_playbackController.Play();
break;
case UIEventSubtype.RemoteControlPause:
_playbackController.Pause();
break;
case UIEventSubtype.RemoteControlTogglePlayPause:
_playbackController.PlayPause();
break;
case UIEventSubtype.RemoteControlStop:
_playbackController.Stop();
break;
case UIEventSubtype.RemoteControlNextTrack:
_playbackController.PlayNext();
break;
case UIEventSubtype.RemoteControlPreviousTrack:
_playbackController.PlayPreviousOrSeekToStart();
break;
case UIEventSubtype.RemoteControlBeginSeekingForward:
StartSeekingForward();
break;
case UIEventSubtype.RemoteControlBeginSeekingBackward:
StartSeekingBackward();
break;
case UIEventSubtype.RemoteControlEndSeekingForward:
case UIEventSubtype.RemoteControlEndSeekingBackward:
EndSeeking();
break;
}
}
public PlaybackViewModel(IPlaybackController playbackController, Settings settings,
IMixViewModelFactory mixViewModelFactory)
{
this.playbackController = playbackController;
this.settings = settings;
var volumeString = (string)settings[volumeKey] ?? "50";
Volume = Double.Parse(volumeString);
_CurrentPosition = playbackController.CurrentPositionObservable
.ToProperty(this, x => x.CurrentPosition);
_CurrentPositionAsString = playbackController.CurrentPositionObservable
.Select(TimeSpan.FromSeconds)
.Select(DurationToString)
.ToProperty(this, x => x.CurrentPositionAsString);
// connecting current mix being played to the viewmodel
IObservable <MixViewModel> currentMixViewModelObservable = playbackController.CurrentMixObservable.Select(mixViewModelFactory.CreateMixViewModel);
_CurrentMixViewModel = currentMixViewModelObservable
.ToProperty(this, x => x.CurrentMixViewModel);
IObservable <bool> _CurrentMixViewModelPresent =
this.WhenAny(
x => x.CurrentMixViewModel,
mixViewModel => mixViewModel.Value != null &&
mixViewModel.Value.Model != Mix.NoMixAvailable);
_CurrentTrackDurationAsString = playbackController.CurrentDurationObservable
.Select(duration => DurationToString(TimeSpan.FromSeconds(duration)))
.ToProperty(this, x => x.CurrentTrackDurationAsString);
_CurrentTrackDuration = playbackController.CurrentDurationObservable
.ToProperty(this, x => x.CurrentTrackDuration);
// commands
// going to the next song only if there is a mix currently loaded
_NextSong = currentMixViewModelObservable
.Select(x => x.NextSong)
.ToProperty(this, x => x.NextSong);
var audioPlayerState = playbackController.PlayerStateObservable;
// both having a current mix and not running
var audioPlayerNotRunning = audioPlayerState.Select(status =>
status == MediaStatus.Stopped ||
status == MediaStatus.Paused).CombineLatest(
_CurrentMixViewModelPresent, (x, y) => x && y);
Continue = new ReactiveAsyncCommand(audioPlayerNotRunning, 1);
Continue.Subscribe(_ => playbackController.Continue());
var audioPlayerRunning = audioPlayerState.Select(status => status == MediaStatus.Running);
Pause = new ReactiveAsyncCommand(audioPlayerRunning, 1);
Pause.Subscribe(_ => playbackController.Pause());
var audioPlayerRunningOrPaused = audioPlayerState.Select(status =>
status == MediaStatus.Running ||
status == MediaStatus.Paused);
Stop = new ReactiveAsyncCommand(audioPlayerRunningOrPaused, 1);
Stop.Subscribe(_ => playbackController.Stop());
NextMix = new ReactiveAsyncCommand(_CurrentMixViewModelPresent, 1);
NextMix.RegisterAsyncAction(_ =>
{
try
{
playbackController.NextMix();
}
catch (Exception e)
{
log.Error("Unable to go to the next mix", e);
}
}
);
bool debugModeOn = ConfigurationManager.AppSettings["AudioPlayer"] != null && ConfigurationManager.AppSettings["AudioPlayer"].Equals("DirectX WMI 3.14169");
_IsPositionSliderEnabled = audioPlayerRunningOrPaused
.Select(a => a && debugModeOn)
.ToProperty(this, x => x.IsPositionSliderEnabled);
GoToTrack = new ReactiveAsyncCommand(_CurrentMixViewModelPresent, 1);
GoToTrack.Subscribe(_ =>
{
if (debugModeOn)
{
try
{
playbackController.GoToTrack(SelectedTrackIndex);
}
catch (Exception e)
{
log.Error("Unable to go to track " + SelectedTrackIndex, e);
}
}
});
Skip = new ReactiveAsyncCommand(audioPlayerRunningOrPaused, 1);
Skip.Subscribe(step =>
{
double newPosition = CurrentPosition + Double.Parse((string)step);
if (newPosition >= 0 && newPosition <= CurrentTrackDuration)
{
CurrentPosition = newPosition;
}
});
ChangeVolume = new ReactiveAsyncCommand(null, 1);
ChangeVolume.Subscribe(step =>
{
double newVolume = Volume + Double.Parse((string)step);
if (newVolume >= 0 && newVolume <= 100)
{
Volume = newVolume;
}
});
}
private void TheApplicationIssuesACommandToPauseTheMix()
{
playbackController.Pause();
}