GTK: How to implement a DnD interface for GtkTreeView that..

I need to implement a DnD interface for GtkTreeView widget that works with
underlying GtkTreeModel or GtkTreeModelFilter models. I can't use the
default DnD interface since GtkTreeModel and GtkTreeModelFilter don't
implement GtkTreeDragDest interface. I'm trying to implement DnD for this
case by writing my own signal handlers for the drag_data_received and
drag_drop signals of the GtkTreeView widget. So far I have not succeeded
to get this working.

Has anyone else implemented a similar kind of thing or do you know what
the signal handlers should do? In short, the
question is of implementing DnD support for a GtkTreeView
widget when the underlying model is not a widget implementing the
GtkTreeDragDest interface.

- Tommi Höynälänmaa -