protected override void InsertItem(int index, Node item)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
if (item.Parent != _owner)
{
if (item.Parent != null)
{
item.Parent.Nodes.Remove(item);
}
item._parent = _owner;
item._index = index;
for (int i = index; i < Count; i++)
{
this[i]._index++;
}
base.InsertItem(index, item);
TreeModel model = _owner.FindModel();
if (model != null)
{
model.OnNodeInserted(_owner, index, item);
}
}
}
