Howto drag'n drop to ctree items?

[Till Harbaum <harbaum ibr cs tu-bs de>]

Hi!

I wam working on the gtk frontend for the
rio500. The user interface of this basically 
is a ctree. Now i'd like to allow the user 
to drag files to folder entries displayed 
in the ctree window much like mc does. How 
do i determine, which entry a file is 
dragged onto?

The ctree drag events only give me coordinates.
How do i determine the ctree row or entry from 
the coordinates?

Ciao,
  Till