Add a basic popup menu implementation to stocks2

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/modal_overlay.dart';
+import 'package:sky/framework/components2/popup_menu.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 'stock_menu.dart';
 
 import 'dart:async';
 import 'dart:sky' as sky;
 
 enum StockMode { optimistic, pessimistic }
 
 class StocksApp extends App {
 
   // static final Style _titleStyle = new Style('''
   //   ${typography.white.title};''');
@@ skipping 35 matching lines @@
 
   DrawerController _drawerController;
   bool _drawerShowing = false;
 
   void _handleDrawerStatusChanged(bool showing) {
     setState(() {
       _drawerShowing = showing;
     });
   }
 
-  // PopupMenuController _menuController;
+  PopupMenuController _menuController;
 
   void _handleMenuShow(_) {
     setState(() {
-      // _menuController = new PopupMenuController();
-      // _menuController.open();
+      _menuController = new PopupMenuController();
+      _menuController.open();
     });
   }
 
   void _handleMenuHide(_) {
     setState(() {
-      // _menuController.close().then((_) {
-      //   setState(() {
-      //     _menuController = null;
-      //   });
-      // });
+      _menuController.close().then((_) {
+        setState(() {
+          _menuController = null;
+        });
+      });
     });
   }
 
   bool _autorefresh = false;
   void _handleAutorefreshChanged(bool value) {
     setState(() {
       _autorefresh = value;
     });
   }
 
@@ skipping 74 matching lines @@
         onGestureTap: _handleSearchEnd),
       center: new Input(
         focused: true,
         placeholder: 'Search stocks',
         onChanged: _handleSearchQueryChanged),
       backgroundColor: colors.Grey[50]
     );
   }
 
   void addMenuToOverlays(List<UINode> overlays) {
-    // if (_menuController == null)
-    //   return;
-    // overlays.add(new ModalOverlay(
-    //   children: [new StockMenu(
-    //     controller: _menuController,
-    //     autorefresh: _autorefresh,
-    //     onAutorefreshChanged: _handleAutorefreshChanged
-    //   )],
-    //   onDismiss: _handleMenuHide));
+    if (_menuController == null)
+      return;
+    overlays.add(new ModalOverlay(
+      children: [new StockMenu(
+        controller: _menuController,
+        autorefresh: _autorefresh,
+        onAutorefreshChanged: _handleAutorefreshChanged
+      )],
+      onDismiss: _handleMenuHide));
   }
 
   UINode build() {
     List<UINode> overlays = [
       new Scaffold(
         toolbar: _isSearching ? buildSearchBar() : buildToolBar(),
         body: new Stocklist(stocks: _stocks, query: _searchQuery),
         floatingActionButton: new FloatingActionButton(
           content: new Icon(type: 'content/add_white', size: 24),
           level: 3),
         drawer: _drawerShowing ? buildDrawer() : null
       ),
     ];
     addMenuToOverlays(overlays);
     return new StackContainer(children: overlays);
   }
 }
 
 void main() {
   print("starting stocks app!");
   App app = new StocksApp();
   app.appView.onFrame = () {
     // uncomment this for debugging:
     // app.appView.debugDumpRenderTree();
   };
 }