[ruby-gnome2-devel-en] Moving rows included on a gtk treeview using a single button Up - Down

[<xel...@gm...>]

Hello everybody i'm new here :), I'm trying to get handle of gtk
treeviews, right now, i know how to create rows, columns and some
else, but i have a problem, i want to move the rows using a button,
come on the classic up and down, well i don't an idea to do that =/
i'm learning about ruby + gtk, i think this combination is simply wow,
here is the code i'm using glade, libglade can someone let me a little
of light?, some example to do that or just talk me something about,
using glade or simple gtk.

here you can see my screenshot:

http://img214.imageshack.us/img214/9959/treeviewzf4.png