toolbar->addSeparator();
toolbar->addAction(action_view_zoom_in);
toolbar->addAction(action_view_zoom_out);
toolbar->addAction(action_view_zoom_fit);
toolbar->addSeparator();
toolbar->addAction(action_view_zoom_in);
toolbar->addAction(action_view_zoom_out);
toolbar->addAction(action_view_zoom_fit);