+ _session.remove_route (_subgroup_bus);
+ _subgroup_bus.reset ();
+}
+
+bool
+RouteGroup::has_subgroup() const
+{
+ return _subgroup_bus != 0;
+}
+
+bool
+RouteGroup::enabled_property (PBD::PropertyID prop)
+{
+ OwnedPropertyList::iterator i = _properties->find (prop);
+ if (i == _properties->end()) {
+ return false;
+ }
+
+ return dynamic_cast<const PropertyTemplate<bool>* > (i->second)->val ();
+}
+
+void
+RouteGroup::post_set (PBD::PropertyChange const &)
+{
+ push_to_groups ();
+}
+
+void
+RouteGroup::push_to_groups ()
+{
+ if (is_relative()) {
+ _gain_group->set_mode (ControlGroup::Mode (_gain_group->mode()|ControlGroup::Relative));
+ } else {
+ _gain_group->set_mode (ControlGroup::Mode (_gain_group->mode()&~ControlGroup::Relative));
+ }
+
+ if (_active) {
+ _gain_group->set_active (is_gain());
+ _solo_group->set_active (is_solo());
+ _mute_group->set_active (is_mute());
+ _rec_enable_group->set_active (is_recenable());
+ _monitoring_group->set_active (is_monitoring());
+ } else {
+ _gain_group->set_active (false);
+ _solo_group->set_active (false);
+ _mute_group->set_active (false);
+
+ _rec_enable_group->set_active (false);
+ _monitoring_group->set_active (false);
+ }
+}
+
+void
+RouteGroup::assign_master (boost::shared_ptr<VCA> master)
+{
+ if (!routes || routes->empty()) {
+ return;
+ }
+
+ boost::shared_ptr<Route> front = routes->front ();
+
+ if (front->slaved_to (master)) {
+ return;
+ }
+
+ for (RouteList::iterator r = routes->begin(); r != routes->end(); ++r) {
+ (*r)->assign (master);
+ }
+
+ group_master = master;
+ _group_master_number = master->number();
+
+ _used_to_share_gain = is_gain ();
+ set_gain (false);
+}
+
+void
+RouteGroup::unassign_master (boost::shared_ptr<VCA> master)
+{
+ if (!routes || routes->empty()) {
+ return;
+ }
+
+ boost::shared_ptr<Route> front = routes->front ();
+
+ if (!front->slaved_to (master)) {
+ return;
+ }
+
+ for (RouteList::iterator r = routes->begin(); r != routes->end(); ++r) {
+ (*r)->unassign (master);
+ }
+
+ group_master.reset ();
+ _group_master_number = -1;
+
+ set_gain (_used_to_share_gain);
+}
+
+bool
+RouteGroup::slaved () const
+{
+ if (!routes || routes->empty()) {
+ return false;
+ }
+
+ return routes->front()->slaved ();
+}
+
+bool
+RouteGroup::has_control_master() const
+{
+ return group_master.lock() != 0;