TreeView - First element

[Adam Chyła <adam chyla gmail com>]

Hello all,

How can I check that the selected element on TreeView is first or last?

I have that code:

File.H

...

Gtk::TreeView ListTreeView;

Gtk::TreeModel::Row row;

Glib::RefPtr<Gtk::ListStore> ListTreeModel;

...

File.CPP

...  THIS CODE MOVE ELEMENT UP

Glib::RefPtr<Gtk::TreeSelection> ref = ListTreeView.get_selection();

Gtk::TreeModel::iterator iter = ref->get_selected();

if (ListTreeModel->children().begin() != iter)

ListTreeModel->iter_swap(iter, iter--); // But if iter is the first element from the list the code isn't work properly

...