How can I get returned the id of the droppable object and the drop zone 
it was dropped in on a drop event? Not sure who method I need to 
override.
I have a tree structure and was thinking of using drag and drop to move 
elements in the tree structure.  Planed to do this by making all the 
nodes drop zones and put droppable pictures on top.
If you move a element to a new drop zone I need to know the dropped 
object and the drop zone id for updating the tree.
I don’t care if I raise the event if the object return to the original 
drop zone because I will check the id of the objects before updating.

http://forum.openrico.org/topic/838#1795