+ if (route()->master() || route()->control()) {
+
+ if (scrollbar_height == 0) {
+ HScrollbar scrollbar;
+ Gtk::Requisition requisition(scrollbar.size_request ());
+ scrollbar_height = requisition.height;
+ }
+
+ EventBox* spacer = manage (new EventBox);
+ spacer->set_size_request (-1, scrollbar_height);
+ global_vpacker.pack_start (*spacer, false, false);
+ }
+