+
+bool
+Automatable::find_next_event (double now, double end, Evoral::ControlEvent& next_event, bool only_active) const
+{
+ Controls::const_iterator li;
+
+ next_event.when = std::numeric_limits<double>::max();
+
+ for (li = _controls.begin(); li != _controls.end(); ++li) {
+ boost::shared_ptr<AutomationControl> c
+ = boost::dynamic_pointer_cast<AutomationControl>(li->second);
+
+ if (only_active && (!c || !c->automation_playback())) {
+ continue;
+ }
+
+ boost::shared_ptr<SlavableAutomationControl> sc
+ = boost::dynamic_pointer_cast<SlavableAutomationControl>(li->second);
+
+ if (sc) {
+ sc->find_next_event (now, end, next_event);
+ }
+
+ Evoral::ControlList::const_iterator i;
+ boost::shared_ptr<const Evoral::ControlList> alist (li->second->list());
+ Evoral::ControlEvent cp (now, 0.0f);
+ if (!alist) {
+ continue;
+ }
+
+ for (i = lower_bound (alist->begin(), alist->end(), &cp, Evoral::ControlList::time_comparator);
+ i != alist->end() && (*i)->when < end; ++i) {
+ if ((*i)->when > now) {
+ break;
+ }
+ }
+
+ if (i != alist->end() && (*i)->when < end) {
+ if ((*i)->when < next_event.when) {
+ next_event.when = (*i)->when;
+ }
+ }
+ }
+
+ return next_event.when != std::numeric_limits<double>::max();
+}