void Replace(NotifyCollectionChangedEventArgs args)
{
var startIndex = args.NewStartingIndex > -1 ? args.NewStartingIndex : IndexOf(args.NewItems[0]);
startIndex = AdjustPositionForHeader(startIndex);
var newCount = args.NewItems.Count;
if (newCount == args.OldItems.Count)
{
// We are replacing one set of items with a set of equal size; we can do a simple item or range
// notification to the adapter
if (newCount == 1)
{
_notifier.NotifyItemChanged(this, startIndex);
}
else
{
_notifier.NotifyItemRangeChanged(this, startIndex, newCount);
}
return;
}
// The original and replacement sets are of unequal size; this means that everything currently in view will
// have to be updated. So we just have to use NotifyDataSetChanged and let the RecyclerView update everything
_notifier.NotifyDataSetChanged();
}
public void NotifyItemChanged(IItemSource group, int localIndex)
{
localIndex = GetAbsolutePosition(group, localIndex);
notifier.NotifyItemChanged(this, localIndex);
}