Support for icon theming

sky/sdk/example/stocks/lib/stock_home.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/editing/input.dart';
 import 'package:sky/animation/animation_performance.dart';
 import 'package:sky/widgets/animated_component.dart';
 import 'package:sky/widgets/animated_container.dart';
+import 'package:sky/theme/colors.dart' as colors;
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/drawer.dart';
 import 'package:sky/widgets/drawer_header.dart';
 import 'package:sky/widgets/floating_action_button.dart';
 import 'package:sky/widgets/icon.dart';
 import 'package:sky/widgets/icon_button.dart';
 import 'package:sky/widgets/menu_divider.dart';
 import 'package:sky/widgets/menu_item.dart';
 import 'package:sky/widgets/modal_overlay.dart';
 import 'package:sky/widgets/navigator.dart';
@@ skipping 34 matching lines @@
     stockMode = source.stockMode;
     modeUpdater = source.modeUpdater;
   }
 
   bool _isSearching = false;
   String _searchQuery;
 
   AnimatedContainer _snackbarTransform;
 
   void _handleSearchBegin() {
+    navigator.pushState("/search", (_) {
+      setState(() {
+        _isSearching = false;
+        _searchQuery = null;
+      });
+    });
     setState(() {
       _isSearching = true;
     });
   }
 
   void _handleSearchEnd() {
+    assert(navigator.currentRoute.name == '/search');
+    navigator.pop();
+    assert(navigator.currentRoute.name == '/');
     setState(() {
       _isSearching = false;
       _searchQuery = null;
     });
   }
 
   void _handleSearchQueryChanged(String query) {
     setState(() {
       _searchQuery = query;
     });
@@ skipping 95 matching lines @@
   void _handleOpenDrawer() {
     _drawerController.open();
     navigator.pushState("/drawer", (_) {
       _drawerController.close();
     });
   }
 
   Widget buildToolBar() {
     return new ToolBar(
         left: new IconButton(
-          icon: 'navigation/menu_white',
+          icon: "navigation/menu",
           onPressed: _handleOpenDrawer),
         center: new Text('Stocks'),
         right: [
           new IconButton(
-            icon: 'action/search_white',
+            icon: "action/search",
             onPressed: _handleSearchBegin),
           new IconButton(
-            icon: 'navigation/more_vert_white',
+            icon: "navigation/more_vert",
             onPressed: _handleMenuShow)
         ]
       );
   }
 
   int selectedTabIndex = 0;
   List<String> portfolioSymbols = ["AAPL","FIZZ", "FIVE", "FLAT", "ZINC", "ZNGA"];
 
   Iterable<Stock> _filterByPortfolio(Iterable<Stock> stocks) {
     return stocks.where((stock) => portfolioSymbols.contains(stock.symbol));
@@ skipping 31 matching lines @@
       onChanged: (tabIndex) {
         setState(() { selectedTabIndex = tabIndex; } );
       }
     );
   }
 
   // TODO(abarth): Should we factor this into a SearchBar in the framework?
   Widget buildSearchBar() {
     return new ToolBar(
       left: new IconButton(
-        icon: 'navigation/arrow_back_grey600',
+        icon: "navigation/arrow_back",
         onPressed: _handleSearchEnd),
       center: new Input(
         focused: true,
         placeholder: 'Search stocks',
         onChanged: _handleSearchQueryChanged),
       backgroundColor: Theme.of(this).canvasColor
     );
   }
 
   void _handleUndo() {
@@ skipping 18 matching lines @@
         ..position = new AnimatedType<Point>(const Point(0.0, 45.0), end: Point.origin);
       var performance = _snackbarTransform.createPerformance(
           [_snackbarTransform.position], duration: _kSnackbarSlideDuration);
       watchPerformance(performance);
       performance.play();
     });
   }
 
   Widget buildFloatingActionButton() {
     var widget = new FloatingActionButton(
-      child: new Icon(type: 'content/add_white', size: 24),
+      child: new Icon(type: 'content/add', size: 24),
+      backgroundColor: colors.RedAccent[200],
       onPressed: _handleStockPurchased
     );
     if (_snackbarTransform != null)
       widget = _snackbarTransform.build(widget);
     return widget;
   }
 
   void addMenuToOverlays(List<Widget> overlays) {
     if (_menuController == null)
       return;
@@ skipping 13 matching lines @@
         body: buildTabNavigator(),
         snackBar: buildSnackBar(),
         floatingActionButton: buildFloatingActionButton(),
         drawer: _drawerShowing ? buildDrawer() : null
       ),
     ];
     addMenuToOverlays(overlays);
     return new Stack(overlays);
   }
 }