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);
}
}
protected override TItemsViewSource CreateItemsSource()
{
return((TItemsViewSource)ItemsSourceFactory.Create(ItemsView, this));
}
protected virtual TItemsViewSource CreateItemsSource()
{
return((TItemsViewSource)ItemsSourceFactory.Create(ItemsView, this));
}