SetSortFunc

gistfile1.txt

public void SetSortFunc(int sort_column_id, Gtk.TreeIterCompareFunc sort_func) {
    GtkSharp.TreeIterCompareFuncWrapper sort_func_wrapper = new GtkSharp.TreeIterCompareFuncWrapper (sort_func);
    IntPtr user_data;
    GLib.DestroyNotify destroy;
    if (sort_func == null) {
        user_data = IntPtr.Zero;
        destroy = null;
    } else {
        user_data = (IntPtr) GCHandle.Alloc (sort_func_wrapper);
        destroy = GLib.DestroyHelper.NotifyHandler;
    }
    gtk_tree_sortable_set_sort_func(Handle, sort_column_id, sort_func_wrapper.NativeDelegate, user_data, destroy);
}