[Pyobjc-dev] Subclassing NSCell?

[Mitch C. <mit...@ea...>]

Does anyone have examples of subclassing NSCell from within a
Cocoa-Python Document-based application?  I'm trying to do this with
Python 2.3b1 and PyObjc-0.9.

I can create instances of the subclass, defined roughly as

from AppKit import *
class MyCell(NSCell):
	...

and can install these instances as data cells for NSTableColumns in an 
NSTableView.
All cool.  But if I try to override drawInteriorWithFrame_inView_, as 
follows,
I get a segmentation fault on the first attempt to draw cell contents.  
What's more,
I don't get the output from the print statement.

     def drawInteriorWithFrame_inView_(self, cellFrame, controlView):
         print "drawInteriorWithFrame_inView_"
         return super(MyCell, 
self).drawInteriorWithFrame_inView_(cellFrame, controlView)

Note:  I also get the segfault if I comment out the return statement.

If I create an instance from an interactive Python shell and invoke
drawInteriorWithFrame_inView_ manually, with None for both arguments, I 
at least get the
print statement output.

Thanks for guidance!

--
Mitch