+ scale_offset_changed();
+}
+
+list<weak_ptr<SelectableItem> > View::selected_items() const
+{
+ list<weak_ptr<SelectableItem> > items;
+
+ // List the selected signals
+ const vector< shared_ptr<RowItem> > row_items(child_items());
+ for (shared_ptr<RowItem> r : row_items) {
+ if (r && r->selected())
+ items.push_back(r);
+ }
+
+ // List the selected cursors
+ if (_cursors.first()->selected())
+ items.push_back(_cursors.first());
+ if (_cursors.second()->selected())
+ items.push_back(_cursors.second());
+
+ return items;
+}
+
+set< shared_ptr<SignalData> > View::get_visible_data() const
+{
+ lock_guard<mutex> lock(session().signals_mutex());
+ const vector< shared_ptr<Signal> > &sigs(session().signals());
+
+ // Make a set of all the visible data objects
+ set< shared_ptr<SignalData> > visible_data;
+ for (const shared_ptr<Signal> sig : sigs)
+ if (sig->enabled())
+ visible_data.insert(sig->data());
+
+ return visible_data;
+}
+
+pair<double, double> View::get_time_extents() const
+{
+ const set< shared_ptr<SignalData> > visible_data = get_visible_data();
+ if (visible_data.empty())
+ return make_pair(0.0, 0.0);
+
+ double left_time = DBL_MAX, right_time = DBL_MIN;
+ for (const shared_ptr<SignalData> d : visible_data)
+ {
+ const double start_time = d->get_start_time();
+ double samplerate = d->samplerate();
+ samplerate = (samplerate <= 0.0) ? 1.0 : samplerate;
+
+ left_time = min(left_time, start_time);
+ right_time = max(right_time, start_time +
+ d->get_max_sample_count() / samplerate);
+ }
+
+ assert(left_time < right_time);
+ return make_pair(left_time, right_time);