[Pyobjc-dev] Problem with informal protocol detection? (outlineView:writeItems:toPasteboard:)

[Ben R. <ben...@ma...>]

Has anyone tried to implement this:

	http://allusions.sourceforge.net/articles/treeDragPart1.php

in PyObjC?  I've managed to get it working with CoreData, but am  
having problems with the drag-and-drop in the PyObjC version.  In  
particular, I suspect that the following routine:

class DragController(...)
     ...
     def outlineView_writeItems_toPasteboard_(self, outlineView,  
items, pboard):
         raise RuntimeError
         pboard.declareTypes_owner_(self.dragType, self)
         self.draggedNode = items.objectAtIndex_(0)
         return True

is never being called.  The drag, of course, never begins.  (The  
RuntimeError is there for the purposes of call-detection.)

I've tried to override the respondsToSelector_() method to see if it  
is even being called with the appropriate argument by the NIB  
framework but seem to be missing some magic encantation necessary to  
do so.

I think that I'm doing the necessary prep work in the following method:

     def awakeFromNib(self):
         self.dragType = ("factorialDragType",)
         self.treeTable.registerForDraggedTypes_(self.dragType)
	[...]

Vitals:
	XCode 2.2.1
	Python 2.3.5
	OS X 10.4.6