Gtk2::TreeView or Gtk2::SimpleList right justify?

[Tom Cross <tomc kendeco com>]

I can't find how to make a column (of numbers) right justify when I'm
using a TreeView or (even better) SimpleList.  Is there a way to do
this?

Thanks

        $fields{'slist'} = Gtk2::SimpleList->new (
                'Part Number'   => 'text',
                'Loc'           => 'text',
                'Description'   => 'text',
                'Brand'         => 'text',
                'On Hand'       => 'int',
                'On Order'      => 'int',
                'Demand'        => 'int',
                'Avail'         => 'int',
                'Vendor Part'   => 'text',
              );
        $sw->add ($fields{'slist'});

I want to make the "int" columns right justify or it is very hard to
read....