Re: Resource for building custom models

[Torsten Schoenfeld <kaffeetisch gmx de>]

Jeff Hallock wrote:
> I have a custom TreeView in which I want to implement both a filter and 
> sorting functionality. Unfortunately Gtk2::TreeStore does not implement 
> Gtk2::TreeModelFilter.

Gtk2::TreeModelFilter is not an interface that objects can implement.
Gtk2::TreeModelFilter is itself a Gtk2::TreeModel with the sole purpose of
wrapping another model for the purpose of filtering.  Similarly for
Gtk2::TreeModelSort.

> Currently, I get around this by overriding the following routine in my
> custom TreeView.
> 
> sub set_model { ... }

I think that's exactly how Gtk2::TreeModelFilter and Gtk2::TreeModelSort are
supposed to be used.

> I would like to create a custom model so I don't need to use this hack. I 
> have looked around for information on this - but it is sparse - and that I 
> do find is not all that informative. Does anyone know of a resource that I 
> can use to learn how to do this?

For implementing custom tree models, see `perldoc Gtk2::TreeModel' and
<http://scentric.net/tutorial/sec-custom-models.html>.

-- 
Bye,
-Torsten