public MediaListViewModel(MediaList mediaList, MediaPlaybackList playbackList, CoreDispatcher dispatcher)
{
MediaList = mediaList;
PlaybackList = playbackList;
this.dispatcher = dispatcher;
// Verify consistency of the lists that were passed in
var mediaListIds = mediaList.Select(i => i.ItemId);
var playbackListIds = playbackList.Items.Select(
i => (string)i.Source.CustomProperties.SingleOrDefault(
p => p.Key == MediaItem.MediaItemIdKey).Value);
if (!mediaListIds.SequenceEqual(playbackListIds))
{
throw new ArgumentException("The passed in data model and playback model did not have the same sequence of items");
}
// Initialize the view model items
initializing = true;
foreach (var mediaItem in mediaList)
{
Add(new MediaItemViewModel(this, mediaItem));
}
initializing = false;
// The view model supports TwoWay binding so update when the playback list item changes
PlaybackList.CurrentItemChanged += PlaybackList_CurrentItemChanged;
// Start where the playback list is currently at
CurrentItemIndex = (int)PlaybackList.CurrentItemIndex;
}