public SelectedAlbumViewModel(IEventAggregator eventAggregator, IMusicInfoProvider musicInfoProvider)
{
_musicInfoProvider = musicInfoProvider;
_allTracks = this
.WhenAnyValue(x => x.SelectedItem)
.Throttle(TimeSpan.FromMilliseconds(50), RxApp.TaskpoolScheduler)
.Select(x => x?.CollectionId ?? 0)
.SelectMany(GetAllMusicTracks)
.ObserveOn(RxApp.MainThreadScheduler)
.ToProperty(this, x => x.AllTracks);
_isAvailable = this
.WhenAnyValue(x => x.AllTracks)
.Select(x => x != null && x.Any())
.ToProperty(this, x => x.IsAvailable);
eventAggregator
.GetEvent <AlbumSelectedEvent>()
.Subscribe(album => SelectedItem = album, ThreadOption.UIThread);
this.ObservableForProperty(x => x.SelectedTrack)
.Throttle(TimeSpan.FromMilliseconds(50), RxApp.TaskpoolScheduler)
.Select(x => x.Value)
.Where(x => x != null)
.ObserveOn(RxApp.TaskpoolScheduler)
.Select(x => x.PreviewUrl)
.Subscribe(x => eventAggregator
.GetEvent <TrackSelectedEvent>()
.Publish(x));
}
public MainWindowViewModel(IRegionManager regionManager, IMusicInfoProvider musicInfoProvider,
IImageProvider imageProvider, IEventAggregator eventAggregator, IAudioPlayer audioPlayer)
{
_musicInfoProvider = musicInfoProvider;
_imageProvider = imageProvider;
_audioPlayer = audioPlayer;
regionManager.RegisterViewWithRegion(UIConstants.SelectedAlbumContentRegionName, typeof(SelectedAlbumView));
_searchResults = this
.WhenAnyValue(x => x.SearchString)
.Throttle(TimeSpan.FromMilliseconds(800), RxApp.TaskpoolScheduler)
.Select(x => x?.Trim())
.DistinctUntilChanged()
.Where(x => !string.IsNullOrWhiteSpace(x))
.SelectMany(SearchAllAlbums)
.ObserveOn(RxApp.MainThreadScheduler)
.Do(x => SelectedItem = x.FirstOrDefault())
.ToProperty(this, x => x.SearchResults);
_isAvailable = this
.WhenAnyValue(x => x.SearchResults)
.Select(x => x != null)
.ToProperty(this, x => x.IsAvailable);
this.ObservableForProperty(x => x.SelectedItem)
.Throttle(TimeSpan.FromMilliseconds(50), RxApp.TaskpoolScheduler)
.Select(x => x.Value)
.Subscribe(x => OnSelectedItemChanged(eventAggregator, x));
this.ObservableForProperty(x => x._audioPlayer.CurrentState)
.Throttle(TimeSpan.FromMilliseconds(1000), RxApp.TaskpoolScheduler)
.Select(x => x.Value)
.Subscribe(OnAudioPlayerCurrentStateChanged);
eventAggregator
.GetEvent <TrackSelectedEvent>()
.Subscribe(audioPlayer.SetTrack, ThreadOption.BackgroundThread);
InitializeCommands();
}