Re: [gtkmm] iterating through a ListView

[Chris Vine <chris cvine freeserve co uk>]

On Saturday 21 February 2004 15:09, Andreas B. Thun wrote:
> I´ve found a way to select the next line in a ListView
> by incrementing Gtk::TreeModel::iterator.
>
> The question is now: How can I decrement a Gtk::TreeModel::iterator??
> There is no -- operator!
>
> I want to select the prev. line..
>
>
> // Select next line in my ListView
> void ConstraintTable::onNextClicked()
> {
>    Gtk::TreeModel::iterator curr_iter = m_tree_sel_ref->get_selected();
>    if (curr_iter){
>      if(++curr_iter) {
> 	  Gtk::TreePath path(curr_iter);
> 	  m_tree_sel_ref->select(curr_iter);
> 	  m_tree_view.scroll_to_row(path);
> 	}
>    }
> }

You have to obtain a path object and work on that, viz:

  Gtk::TreeModel::Path tree_path(curr_iter);
  tree_path.prev(); // tree_path now refers to the row of the list store
                    // preceding the selected one
  Gtk::TreeModel::iterator prev_row_iter = [list_store]->get_iter(tree_path);

[list_store] is a Glib::RefPtr<Gtk::ListStore> reference to your list store 
(if that's what you are using).
                                                                                                                      
Chris.