void ToggleDucksDial::insert_to_toolbar(Gtk::Toolbar &toolbar, int index) { if (index < 0) index = toolbar.get_n_items(); // reverse order toolbar.insert(ducks_angle, index); toolbar.insert(ducks_width, index); toolbar.insert(ducks_radius, index); toolbar.insert(ducks_tangent, index); toolbar.insert(ducks_vertex, index); toolbar.insert(ducks_position, index); }