- for (const shared_ptr<TraceTreeItem> r : view_) {
- const shared_ptr<TraceGroup> tg =
- dynamic_pointer_cast<TraceGroup>(r);
- if (tg && tg->selected()) {
+ const vector< shared_ptr<TraceGroup> > groups(
+ view_.list_by_type<TraceGroup>());
+ for (const shared_ptr<TraceGroup> tg : groups)
+ if (tg->selected()) {