a question about sorting

[ahmet öztürk <bilheps gmail com>]

hi,

i use gtkmm for 2 years as a hobby and have a little problem now.

i want to update some toolbar buttons according to the position of the
selected item in a treeview i.e. make next button insensitive if the
current item is the last one.
the treeview is a sortable one and, as far as i understand,
Gtk::TreeSortable::signal_sort_column_changed() is issued BEFORE the
sorting actually takes place. so, when i query the selected row in
signal_sort_column_changed's handler, i get its previous place (before
sorting).

is there a signal issued after sorting is completed?
or any other way of doing this?

thanks..