GtkTreeModelFilter and GtkTreeSortable

[Matí­as Alejandro Torres <torresmat gmail com>]

Hi,

I'm building an application in which there's a tree view that used to 
display a sortable tree model. Yesterday I started using a 
GtkTreeModelFilter for searching patterns in this sortable model.

My problem is that GtkTreeModelFilter does not implements the 
GtkTreeSortable interface and I lost the sorting capabilities that I 
used to have.

Is there a solution to this? I could write a function that filters the 
sortable model that I used to have, but, I'm already using the 
GtkTreeModelFilter and I think it's the best way to go.
Is someone implementing this interface in the GtkTreeModelFilter? I've 
checked in Gtk 2.12 docs and I THINK this isn't implemented yet. If 
somemone can confirm this, I would appreciate it.

Thanks, Matias