Don't hardcode the list of events types in fn

sky/examples/fn/widgets/material.dart

 part of widgets;
 
 abstract class MaterialComponent extends Component {
 
   static const _splashesKey = const Object();
 
   static Style _style = new Style('''
     transform: translateX(0);
     position: absolute;
     top: 0;
     left: 0;
     right: 0;
     bottom: 0'''
   );
 
   LinkedHashSet<SplashAnimation> _splashes;
 
   MaterialComponent({ Object key }) : super(key: key);
 
   Node render() {
     List<Node> children = [];
 
     if (_splashes != null) {
       children.addAll(_splashes.map((s) => new InkSplash(s.onStyleChanged)));
     }
 
     return new Container(
       style: _style,
-      onScrollStart: _cancelSplashes,
-      onWheel: _cancelSplashes,
-      onPointerDown: _startSplash,
       children: children,
       key: _splashesKey
-    );
+    )..events.listen('gesturescrollstart', _cancelSplashes)
+     ..events.listen('wheel', _cancelSplashes)
+     ..events.listen('pointerdown', _startSplash);
   }
 
   sky.ClientRect _getBoundingRect() => getRoot().getBoundingClientRect();
 
   void _startSplash(sky.Event event) {
     setState(() {
       if (_splashes == null) {
         _splashes = new LinkedHashSet<SplashAnimation>();
       }
 
@@ skipping 27 matching lines @@
     }
 
     setState(() {
       _splashes.remove(splash);
       if (_splashes.length == 0) {
         _splashes = null;
       }
     });
   }
 }