[Effen] Use the checkbox widget in the stocks app.

sky/framework/components/ink_well.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 '../layout.dart';
 import 'dart:collection';
 import 'dart:sky' as sky;
 import 'ink_splash.dart';
 import 'scrollable.dart';
 
 class InkWell extends Component implements ScrollClient {
   static final Style _containmentStyleHack = new Style('''
+    align-items: center;
     transform: translateX(0);''');
 
   LinkedHashSet<SplashController> _splashes;
 
   String inlineStyle;
   List<UINode> children;
 
   InkWell({ Object key, this.inlineStyle, this.children })
       : super(key: key) {
     onDidUnmount(() {
       _cancelSplashes(null);
     });
   }
 
   UINode build() {
     List<UINode> childrenIncludingSplashes = [];
 
     if (_splashes != null) {
       childrenIncludingSplashes.addAll(
           _splashes.map((s) => new InkSplash(s.onStyleChanged)));
     }
 
     if (children != null)
       childrenIncludingSplashes.addAll(children);
 
     return new EventListenerNode(
-      new Container(
+      new FlexContainer(
+        direction: FlexDirection.Row,
         style: _containmentStyleHack,
         inlineStyle: inlineStyle,
         children: childrenIncludingSplashes),
       onGestureTapDown: _startSplash,
       onGestureTap: _confirmSplash
     );
   }
 
   void _startSplash(sky.GestureEvent event) {
     setState(() {
@@ skipping 57 matching lines @@
   void _splashDone(SplashController splash) {
     if (_splashes == null)
       return;
     setState(() {
       _splashes.remove(splash);
       if (_splashes.length == 0)
         _splashes = null;
     });
   }
 }