private void RemoveItem(int index)
{
if (index < InternalChildren.Count)
{
RemoveInternalChildRange(index, 1);
}
else
{
int indexInOverflowPanel = index - InternalChildren.Count;
if (QAT != null &&
QAT.OverflowPanel != null)
{
QAT.OverflowPanel.Children.RemoveAt(indexInOverflowPanel);
}
}
GeneratedChildren.RemoveAt(index);
}
protected override void OnItemsChanged(object sender, ItemsChangedEventArgs args)
{
base.OnItemsChanged(sender, args);
switch (args.Action)
{
case NotifyCollectionChangedAction.Add:
if (Generator != null)
{
using (Generator.StartAt(args.Position, GeneratorDirection.Forward, true))
{
UIElement childToAdd = Generator.GenerateNext() as UIElement;
Generator.PrepareItemContainer(childToAdd);
int indexToInsertAt = Generator.IndexFromGeneratorPosition(args.Position);
GeneratedChildren.Insert(indexToInsertAt, childToAdd);
}
}
break;
case NotifyCollectionChangedAction.Remove:
RemoveItem(args.Position.Index);
break;
case NotifyCollectionChangedAction.Reset:
RemoveInternalChildRange(0, InternalChildren.Count);
if (QAT != null &&
QAT.OverflowPanel != null)
{
QAT.OverflowPanel.Children.Clear();
}
RepopulateGeneratedChildren();
break;
case NotifyCollectionChangedAction.Move:
UIElement childToMove = GeneratedChildren[args.OldPosition.Index];
RemoveItem(args.OldPosition.Index);
GeneratedChildren.Insert(args.Position.Index, childToMove);
break;
case NotifyCollectionChangedAction.Replace:
break;
}
}