On Thu, 2003-03-27 at 01:53, Oliver M. Haynold wrote:
> Hello:
> 
> I have a problem understanding PyGtk and couldn't find anything in the
> documentation (presumably because I searched in all the wrong places). I
> don't understand how exactly one can tell PyGtk that a new class
> implements some GInterface.
> 
> Specifically I have a tree model which works very fine and it subclassed
> like this:
> 
> class TopicsTreeModel(gtk.GenericTreeModel):
>     # implementation goes here
> 
> Now I would like to add drag and drop functionality, which (for the role
> as a D&D source) requires my new class to implement gtk.TreeDragSource.
> Perhaps the most pythonic way of doing this would be to inherit from
> gtk.TreeDragSource like this:
> 
> class TopicsTreeModel(gtk.GenericTreeModel, gtk.TreeDragSource):
>     # implementation goes here
> 
> However, that raises an error:
> 
>   File "<stdin>", line 15, in ?
> TypeError: multiple bases have instance lay-out conflict
> 
> Is there something I don't understand about the PyGtk implementation of
> GInterfaces? Any help or reference to the appropriate part of the
> documentation would be greatly appreciated.
> 
> Yours,
> 
>           Oliver
> 
I can't answer your question but I'm very interested in this topic, too.
I'd like to subclass gtk.Combo and implement gtk.CellRenderer to use it
within a tree view. So if anyone knows how to handle Glib interfaces I'd
very appreciate it.

Thomas


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