- get_action_area()->add (base_button);
- get_action_area()->add(collect_button);
- get_action_area()->add (autoscroll_button);
+
+ HBox* bbox = manage (new HBox);
+ bbox->add (base_button);
+ bbox->add (collect_button);
+ bbox->add (autoscroll_button);
+ bbox->show ();
+
+ get_action_area()->add (*bbox);