drag_data_received

Asks the TreeDragDest to insert a row before the path dest, deriving the contents of the row from selection_data.

If dest is outside the tree so that inserting before it is impossible, false will be returned. Also, false may be returned if the new row is not created for some model-specific reason. Should robustly handle a dest no longer found in the model!

Parameters:

this	a TreeDragDest
dest	row to drop in front of
selection_data	data to drop

Returns:

whether a new row was created before position dest