public MixItemViewModel(
IMessenger messenger,
IMixItem mixItem,
PlayPauseTrackCommand playPauseCommand,
IMix mix,
MixViewModel mixViewModel) : base(messenger)
{
this.mix = mix;
this.mixViewModel = mixViewModel;
if (messenger == null) throw new ArgumentNullException("messenger");
if (mixItem == null) throw new ArgumentNullException("mixItem");
if (playPauseCommand == null) throw new ArgumentNullException("playPauseCommand");
if (mix == null) throw new ArgumentNullException("mix");
if (mixViewModel == null) throw new ArgumentNullException("mixViewModel");
MixItem = mixItem;
PlayPauseCommand = playPauseCommand;
messenger.Register<TransitionChangedEvent>(this, OnTransitionChanged);
messenger.Register<PlaybackSpeedAdjustedEvent>(this, OnPlaybackSpeedAdjusted);
messenger.Register<TrackUpdatedEvent>(this, OnTrackUpdated);
messenger.Register<MixLockedEvent>(this, _ => RaisePropertyChanged(() => IsPitchFaderEnabled));
messenger.Register<MixUnlockedEvent>(this, _ => RaisePropertyChanged(() => IsPitchFaderEnabled));
// Required for play/pause status
messenger.Register<PlayerPlayingEvent>(this, _ => RaisePropertyChanged(() => Track));
messenger.Register<PlayerStoppedEvent>(this, _ => RaisePropertyChanged(() => Track));
messenger.Register<ConfigSavedEvent>(this, _ => RaisePropertyChanged(() => ActualKey));
}
public IEnumerable<Tuple<Track, Transition>> GetRecommendations(IMixItem mixItem)
{
if (mixItem == null) throw new ArgumentNullException("mixItem");
return tracks
.Values
.Except(new[] {mixItem.Track}) // don't recommend itself!
.Select(t => Tuple.Create(t, GetTransition(mixItem, t)))
.Where(t => t.Item2 != null);
}
static JsonMixItem ToJsonItem(IMixItem item)
{
return new JsonMixItem
{
Id = item.Track.Id,
Artist = item.Track.Artist,
OriginalBpm = item.Track.OriginalBpm,
Duration = item.Track.Duration,
Filename = item.Track.Filename,
Genre = item.Track.Genre,
OriginalKey = item.Track.OriginalKey,
Label = item.Track.Label,
Title = item.Track.Title,
Year = item.Track.Year,
PlaybackSpeed = item.PlaybackSpeed.Speed
};
}
public AutoMixingContext(
IEnumerable<IMixItem> tracksToMix,
IMixItem preceedingTrack = null,
IMixItem followingTrack = null)
{
if (tracksToMix == null) throw new ArgumentNullException("tracksToMix");
if (preceedingTrack != null && preceedingTrack.IsUnknownKeyOrBpm)
throw new ArgumentException("Boundary track cannot have an unknown key or BPM. Please specify null as the starting track instead and try again.", "preceedingTrack");
if (followingTrack != null && followingTrack.IsUnknownKeyOrBpm)
throw new ArgumentException("Boundary track cannot have an unknown key or BPM. Please specify null as the starting track instead and try again.", "followingTrack");
if (!tracksToMix.Any())
throw new ArgumentException("Must provide at least one track to mix.", "tracksToMix");
PreceedingTrack = preceedingTrack;
TracksToMix = tracksToMix;
FollowingTrack = followingTrack;
}
public MixItemViewModel CreateFor(IMix mix, IMixItem item, MixViewModel mixViewModel)
{
return new MixItemViewModel(messenger, item, playPauseCommand, mix, mixViewModel);
}
public TransitionChangedEvent(IMixItem mixItem)
{
if (mixItem == null) throw new ArgumentNullException("mixItem");
MixItem = mixItem;
}
public TrackAddedToMixEvent(IMixItem item, int insertIndex)
{
if (item == null) throw new ArgumentNullException("item");
Item = item;
InsertIndex = insertIndex;
}
public PlaybackSpeedAdjustedEvent(IMixItem item)
{
if (item == null) throw new ArgumentNullException("item");
MixItem = item;
}
Transition GetTransition(IMixItem mixItem, Track track)
{
return transitionDetector.GetTransitionBetween(mixItem.PlaybackSpeed,
track.GetDefaultPlaybackSpeed());
}
void IgnoreIfUnknownKeyOrBpm(ref IMixItem track)
{
if (track != null && track.IsUnknownKeyOrBpm)
track = null;
}
public TrackRemovedFromMixEvent(IMixItem item, int index)
{
if (item == null) throw new ArgumentNullException("item");
Item = item;
Index = index;
}
