void UpdateGroupTracking()
{
ClearGroupTracking();
for (int n = 0; n < _groupSource.Count; n++)
{
var source = ItemsSourceFactory.Create(_groupSource[n] as IEnumerable, this);
source.HasFooter = _hasGroupFooters;
source.HasHeader = _hasGroupHeaders;
_groups.Add(source);
}
}
internal ItemsViewAdapter(ItemsView itemsView, Func <View, Context, ItemContentView> createItemContentView = null)
{
CollectionView.VerifyCollectionViewFlagEnabled(nameof(ItemsViewAdapter));
ItemsView = itemsView;
_createItemContentView = createItemContentView;
ItemsSource = ItemsSourceFactory.Create(itemsView.ItemsSource, this);
if (_createItemContentView == null)
{
_createItemContentView = (view, context) => new ItemContentView(context);
}
}
internal ItemsViewAdapter(ItemsView itemsView, Func <IVisualElementRenderer, Context, AView> createView = null)
{
CollectionView.VerifyCollectionViewFlagEnabled(nameof(ItemsViewAdapter));
ItemsView = itemsView;
_createView = createView;
_itemsSource = ItemsSourceFactory.Create(itemsView.ItemsSource, this);
if (_createView == null)
{
_createView = (renderer, context) => new ItemContentView(renderer, context);
}
}
internal ItemsViewAdapter(ItemsView itemsView, Func <View, Context, ItemContentView> createItemContentView = null)
{
Xamarin.Forms.CollectionView.VerifyCollectionViewFlagEnabled(nameof(ItemsViewAdapter));
ItemsView = itemsView ?? throw new ArgumentNullException(nameof(itemsView));
UpdateUsingItemTemplate();
UpdateHeaderOffset();
UpdateHasFooter();
ItemsView.PropertyChanged += ItemsViewPropertyChanged;
_createItemContentView = createItemContentView;
ItemsSource = ItemsSourceFactory.Create(itemsView.ItemsSource, this);
if (_createItemContentView == null)
{
_createItemContentView = (view, context) => new ItemContentView(context);
}
}
protected override TItemsViewSource CreateItemsSource()
{
return((TItemsViewSource)ItemsSourceFactory.Create(ItemsView, this));
}
protected virtual TItemsViewSource CreateItemsSource()
{
return((TItemsViewSource)ItemsSourceFactory.Create(ItemsView, this));
}