[pygtk] Cancel editing on a gtk.CellRendererText

[Seth Mahoney]

   Hi,

   I've got a TreeView that displays different kinds of data -  
basically book citations and plain text - in a sort of outline  
format.  I'd like the plain text to be editable, and the book  
citations to be noneditable, but I can't seem to figure out how to  
cancel editing.  The first column of my TreeModel contains the text to  
be displayed, and the second column contains xml data, which isn't  
displayed, but is used for a variety of purposes, including  
identifying the type of data.  The callback correctly prints "called!"  
when I try to edit a citation, but doesn't cancel the edit.  I've also  
tried calling editing_canceled(), but that doesn't work either.   
Here's what my callback, connected to "editing-started", looks like  
right now:

       def outline_edit_start_cb(self, cell, editable, path, model):
        my_iter = model.get_iter_from_string(path)
        if model.get_value(my_iter, 1).tag == "cite":
            print "called!"   
            cell.stop_editing(True)
            return True
        return False

   Any help would be appreciated.

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