+ for(set<Block *>::iterator i=del_blocks.begin(); i!=del_blocks.end(); ++i)
+ delete *i;
+
+ create_blocks();
+}
+
+void Layout::remove_block(Block &b)
+{
+ blocks.erase(&b);
+}
+
+void Layout::add_route(Route &r)
+{
+ if(routes.insert(&r).second)
+ signal_route_added.emit(r);
+}
+
+Route &Layout::get_route(const string &name) const
+{
+ for(set<Route *>::const_iterator i=routes.begin(); i!=routes.end(); ++i)
+ if((*i)->get_name()==name)
+ return **i;
+ throw KeyError("Unknown route", name);
+}
+
+void Layout::update_routes()
+{
+ for(set<Route *>::iterator i=routes.begin(); i!=routes.end(); ++i)
+ (*i)->update_turnouts();
+}
+
+void Layout::remove_route(Route &r)
+{
+ if(routes.erase(&r))
+ signal_route_removed.emit(r);
+}
+
+void Layout::add_train(Train &t)
+{
+ if(trains.count(t.get_address()))
+ throw KeyError("Duplicate train address", lexical_cast(t.get_address()));
+
+ trains[t.get_address()] = &t;
+ signal_train_added.emit(t);