On a drop on a tree node, I'd like to get the item that is
being dropped on.
Tree object being dropped on: event.currentTarget
Index of node in tree being dropped on:
event.currentTarget..calculateDropIndex(event); where event is the
dropTarget is a great name for a method that would do this,
but it returns a display object.
1. Use the index to somehow go through the XML data provider.
I don't think this is the right way - the XML structure is not list
2. The Tree creates a list from the XML. How can I leverage
that and get the item for a given node index? dropTarget seems like
the right term, but it returns a display object.
3. tree.selectedItem and tree.Selected Items return null and
an array of null, so I can't use that either.