Add a basic popup menu implementation to stocks2

The popup menu is displayed in the wrong location with the wrong width, but it
does draw. I've also removed the checkbox because the flex container was
causing me trouble.  I'll add it back in a later CL.

R=ianh@google.com

Review URL: https://codereview.chromium.org/1166153002

examples/stocks2/lib/stock_app.dart

@@ -11,8 +11,8 @@ 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';
@@ -21,7 +21,7 @@ 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;
@@ -77,22 +77,22 @@ class StocksApp extends App {
     });
   }
 
-  // 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;
+        });
+      });
     });
   }
 
@@ -187,15 +187,15 @@ class StocksApp extends App {
   }
 
   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() {

examples/stocks2/lib/stock_menu.dart

@@ -8,10 +8,10 @@ import 'package:sky/framework/components2/checkbox.dart';
 import 'package:sky/framework/theme/view_configuration.dart';
 
 class StockMenu extends Component {
-  static final Style _style = new Style('''
-    position: absolute;
-    right: 8px;
-    top: ${8 + kStatusBarHeight}px;''');
+  // static final Style _style = new Style('''
+  //   position: absolute;
+  //   right: 8px;
+  //   top: ${8 + kStatusBarHeight}px;''');
 
   PopupMenuController controller;
 
@@ -20,24 +20,20 @@ class StockMenu extends Component {
   final bool autorefresh;
   final ValueChanged onAutorefreshChanged;
 
-  static FlexBoxParentData _flex1 = new FlexBoxParentData()..flex = 1;
-
   UINode build() {
     var checkbox = new Checkbox(
       checked: this.autorefresh,
       onChanged: this.onAutorefreshChanged
     );
 
-    return new StyleNode(
-      new PopupMenu(
+    return new PopupMenu(
       controller: controller,
       items: [
         [new Text('Add stock')],
         [new Text('Remove stock')],
-          [new ParentDataNode(new Text('Autorefresh'), _flex1), checkbox],
+        // [new FlexExpandingChild(new Text('Autorefresh')), checkbox],
       ],
-        level: 4),
-        _style
+      level: 4
     );
   }
 }