Implement radio button for Sky’s fn2

sky/examples/stocks2/lib/stock_app.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 'package:sky/framework/components2/tool_bar.dart';
 import 'package:sky/framework/components2/drawer.dart';
 // import 'package:sky/framework/components2/drawer_header.dart';
 // import 'package:sky/framework/components2/floating_action_button.dart';
 // import 'package:sky/framework/components2/icon.dart';
 import 'package:sky/framework/components2/icon_button.dart';
 import 'package:sky/framework/components2/menu_divider.dart';
 import 'package:sky/framework/components2/menu_item.dart';
 import 'package:sky/framework/components2/input.dart';
 // import 'package:sky/framework/components2/modal_overlay.dart';
 // import 'package:sky/framework/components2/popup_menu.dart';
-// import 'package:sky/framework/components2/radio.dart';
+import 'package:sky/framework/components2/radio.dart';
 import 'package:sky/framework/components2/scaffold.dart';
 import 'package:sky/framework/fn2.dart';
 import 'package:sky/framework/theme2/typography.dart' as typography;
 import 'package:sky/framework/theme2/colors.dart' as colors;
 import 'stock_data.dart';
 import 'package:sky/framework/rendering/box.dart';
 import 'stock_list.dart';
 // import 'stock_menu.dart';
 
 import 'dart:async';
@@ skipping 76 matching lines @@
     });
   }
 
   StockMode _stockMode = StockMode.optimistic;
   void _handleStockModeChange(StockMode value) {
     setState(() {
       _stockMode = value;
     });
   }
 
-  // static FlexBoxParentData _flex1 = new FlexBoxParentData()..flex = 1;
-
   Drawer buildDrawer() {
     return new Drawer(
       controller: _drawerController,
       level: 3,
       children: [
         // new DrawerHeader(children: [new Text('Stocks')]),
         new MenuItem(
           key: 'Stock list',
           icon: 'action/assessment',
           children: [new Text('Stock List')]),
         new MenuItem(
           key: 'Account Balance',
           icon: 'action/account_balance',
           children: [new Text('Account Balance')]),
         new MenuDivider(key: 'div1'),
-        // new MenuItem(
-        //   key: 'Optimistic Menu Item',
-        //   icon: 'action/thumb_up',
-        //   onGestureTap: (event) => _handleStockModeChange(StockMode.optimistic),
-        //   children: [
-        //     new ParentDataNode(new Text('Optimistic'), _flex1),
-        //     new Radio(key: 'optimistic-radio', value: StockMode.optimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
-        //   ]),
-        // new MenuItem(
-        //   key: 'Pessimistic Menu Item',
-        //   icon: 'action/thumb_down',
-        //   onGestureTap: (event) => _handleStockModeChange(StockMode.pessimistic),
-        //   children: [
-        //     new ParentDataNode(new Text('Pessimistic'), _flex1),
-        //     new Radio(key: 'pessimistic-radio', value: StockMode.pessimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
-        //   ]),
-        // new MenuDivider(key: 'div2'),
+        new MenuItem(
+          key: 'Optimistic Menu Item',
+          icon: 'action/thumb_up',
+          onGestureTap: (event) => _handleStockModeChange(StockMode.optimistic),
+          children: [
+            new FlexExpandingChild(new Text('Optimistic'), 1),
+            new Radio(key: 'optimistic-radio', value: StockMode.optimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
+          ]),
+        new MenuItem(
+          key: 'Pessimistic Menu Item',
+          icon: 'action/thumb_down',
+          onGestureTap: (event) => _handleStockModeChange(StockMode.pessimistic),
+          children: [
+            new FlexExpandingChild(new Text('Pessimistic'), 1),
+            new Radio(key: 'pessimistic-radio', value: StockMode.pessimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
+          ]),
+        new MenuDivider(key: 'div2'),
         new MenuItem(
           key: 'Settings',
           icon: 'action/settings',
           children: [new Text('Settings')]),
         new MenuItem(
           key: 'Help & Feedback',
           icon: 'action/help',
           children: [new Text('Help & Feedback')])
      ]
     );
@@ skipping 60 matching lines @@
 }
 
 void main() {
   print("starting stocks app!");
   App app = new StocksApp();
   app.appView.onFrame = () {
     // uncomment this for debugging:
     // app.appView.debugDumpRenderTree();
   };
 }