Centralized event streams

runtime/observatory/lib/src/elements/nav/notify_event.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:html';
 import 'dart:async';
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
 import 'package:observatory/src/elements/helpers/tag.dart';
 import 'package:observatory/src/elements/helpers/uris.dart';
 
 class EventDeleteEvent{
   final M.Event event;
   EventDeleteEvent(this.event);
 }
 
 class NavNotifyEventElement extends HtmlElement implements Renderable {
   static const tag = const Tag<NavNotifyEventElement>('nav-event');
 
   RenderingScheduler _r;
 
   Stream<RenderedEvent<NavNotifyEventElement>> get onRendered => _r.onRendered;
 
   final StreamController<EventDeleteEvent> _onDelete =
       new StreamController<EventDeleteEvent>.broadcast();
   Stream<EventDeleteEvent> get onDelete => _onDelete.stream;
 
   M.Event _event;
+  
   M.Event get event => _event;
 
   factory NavNotifyEventElement(M.Event event, {RenderingQueue queue}) {
     assert(event != null);
     NavNotifyEventElement e = document.createElement(tag.name);
     e._r = new RenderingScheduler(e, queue: queue);
     e._event = event;
     return e;
   }
 
@@ skipping 184 matching lines @@
   }
 
   void _delete(EventDeleteEvent e) {
     _onDelete.add(e);
   }
 
   void delete() {
     _onDelete.add(new EventDeleteEvent(_event));
   }
 }