[Effen] s/Node/UINode/, s/Element/WrapperNode/, s/EventTarget/EventListenerNode/

sky/framework/components/checkbox.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import '../fn.dart';
 import 'button_base.dart';
 
 typedef void ValueChanged(value);
 
 class Checkbox extends ButtonBase {
@@ skipping 46 matching lines @@
 
   bool checked;
   ValueChanged onChanged;
 
   Checkbox({ Object key, this.onChanged, this.checked }) : super(key: key);
 
   void _handleClick(sky.Event e) {
     onChanged(!checked);
   }
 
-  Node buildContent() {
-    return new EventTarget(
+  UINode buildContent() {
+    return new EventListenerNode(
       new Container(
         style: _style,
         children: [
           new Container(
             style: highlight ? _containerHighlightStyle : _containerStyle,
             children: [
               new Container(
                 style: checked ? _checkedStyle : _uncheckedStyle
               )
             ]
           )
         ]
       ),
       onGestureTap: _handleClick
     );
   }
 }