/// <summary>
/// Class constructor for new-style navigation params.
/// </summary>
/// <param name="args">Navigation event args.</param>
public LibraryViewModel(GroupedViewNavigationArgs args) : base(Window.Current.Dispatcher)
{
RegisterEventHandlers();
_isGrouped = true;
_viewType = args.PageType;
// Fallback or default title
DesktopTitleViewConfiguration.SetTitleBarText(
CommonSharedStrings.LibraryTitle);
// Always set last used comparer.
if (_viewType == CommonItemType.Song)
{
var groupState = new PageGroupingStateManager <CommonGroupedListView>(_viewType);
var comparer = groupState.GetLastUsedPair();
GroupedItems = new GroupedSource(comparer.Indexer, comparer.GroupComparer, comparer.ItemComparer);
}
else if (_viewType == CommonItemType.Album || _viewType == CommonItemType.Artist)
{
var groupState = new PageGroupingStateManager <CommonGroupedGridView>(_viewType);
var comparer = groupState.GetLastUsedPair();
GroupedItems = new GroupedSource(comparer.Indexer, comparer.GroupComparer, comparer.ItemComparer);
}
else
{
GroupedItems = new GroupedSource(args.EntityIndexer, args.GroupComparer, args.ItemComparer);
}
}
public virtual object GetItem(UICollectionView collectionView, NSIndexPath indexPath)
{
var section = GroupedSource?.ElementAtOrDefault(indexPath.Section);
if (section != null)
{
return(section.Cast <object>().ElementAtOrDefault(indexPath.Row));
}
else
{
return(Items.ElementAtOrDefault(indexPath.Row));
}
}
public override nint GetItemsCount(UICollectionView collectionView, nint section)
{
return(GroupedSource?.ElementAtOrDefault((int)section)?.Count() ?? Items.Count());
}
public override nint NumberOfSections(UICollectionView collectionView)
{
return(GroupedSource?.Count() == 0 ? 1 : GroupedSource?.Count() ?? 1);
}
protected CoreViewBase(CoreDispatcher dispatcher)
{
Dispatcher = dispatcher;
Oplock = new object();
GroupedItems = new GroupedSource(new CharacterGroupingIndexer(), new AlphabetAscendComparer(), new AlphabetAscendComparer());
}
