internal PlaylistCollectionChangedEventArgs(IPlaylistCollection oldPlaylists, IPlaylistCollection newPlaylists)
{
AddedPlaylists = newPlaylists?.Select((s, i) => new ChangeCollectionItem <IPlaylist>(i, s)).
Where(c => !oldPlaylists.Contains(c.Item)).ToArray() ?? new ChangeCollectionItem <IPlaylist> [0];
RemovedPlaylists = oldPlaylists?.Select((s, i) => new ChangeCollectionItem <IPlaylist>(i, s)).
Where(c => !newPlaylists.Contains(c.Item)).ToArray() ?? new ChangeCollectionItem <IPlaylist> [0];
}
private void Subscribe(IPlaylistCollection playlists)
{
if (playlists == null)
{
return;
}
playlists.Changed += OnPlaylistsCollectionChanged;
Subscribe(playlists.AsEnumerable());
}
public PlaylistsChangedEventArgs(IPlaylistCollection oldPlaylists, IPlaylistCollection newPlaylists)
{
OldPlaylists = oldPlaylists;
NewPlaylists = newPlaylists;
}