void Move(NotifyCollectionChangedEventArgs args)
{
var count = args.NewItems.Count;
if (count == 1)
{
// For a single item, we can use NotifyItemMoved and get the animation
_notifier.NotifyItemMoved(this, AdjustPositionForHeader(args.OldStartingIndex), AdjustPositionForHeader(args.NewStartingIndex));
return;
}
var start = AdjustPositionForHeader(Math.Min(args.OldStartingIndex, args.NewStartingIndex));
var end = AdjustPositionForHeader(Math.Max(args.OldStartingIndex, args.NewStartingIndex) + count);
_notifier.NotifyItemRangeChanged(this, start, end);
}
public void NotifyItemRangeChanged(IItemSource group, int localStartIndex, int localEndIndex)
{
localStartIndex = GetAbsolutePosition(group, localStartIndex);
localEndIndex = GetAbsolutePosition(group, localEndIndex);
notifier.NotifyItemRangeChanged(this, localStartIndex, localEndIndex);
}