Use semantic names for callbacks instead of onGestureTap

sky/examples/stocks2/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/editing2/input.dart';
 import 'package:sky/theme2/colors.dart' as colors;
 import 'package:sky/theme2/typography.dart' as typography;
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/drawer.dart';
 import 'package:sky/widgets/drawer_header.dart';
@@ skipping 28 matching lines @@
     });
     _drawerController = new DrawerController(_handleDrawerStatusChanged);
   }
 
   List<Stock> _stocks = [];
   Navigator _navigator;
 
   bool _isSearching = false;
   String _searchQuery;
 
-  void _handleSearchBegin(_) {
+  void _handleSearchBegin() {
     setState(() {
       _isSearching = true;
     });
   }
 
-  void _handleSearchEnd(_) {
+  void _handleSearchEnd() {
     setState(() {
       _isSearching = false;
       _searchQuery = null;
     });
   }
 
   void _handleSearchQueryChanged(String query) {
     setState(() {
       _searchQuery = query;
     });
   }
 
   DrawerController _drawerController;
   bool _drawerShowing = false;
 
   void _handleDrawerStatusChanged(bool showing) {
     setState(() {
       _drawerShowing = showing;
     });
   }
 
   PopupMenuController _menuController;
 
-  void _handleMenuShow(_) {
+  void _handleMenuShow() {
     setState(() {
       _menuController = new PopupMenuController();
       _menuController.open();
     });
   }
 
-  void _handleMenuHide(_) {
+  void _handleMenuHide() {
     setState(() {
       _menuController.close().then((_) {
         setState(() {
           _menuController = null;
         });
       });
     });
   }
 
   bool _autorefresh = false;
@@ skipping 21 matching lines @@
           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),
+          onPressed: () => _handleStockModeChange(StockMode.optimistic),
           children: [
             new Flexible(child: new Text('Optimistic')),
             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),
+          onPressed: () => _handleStockModeChange(StockMode.pessimistic),
           children: [
             new Flexible(child: new Text('Pessimistic')),
             new Radio(key: 'pessimistic-radio', value: StockMode.pessimistic, groupValue: _stockMode, onChanged: _handleStockModeChange)
           ]),
         new MenuDivider(key: 'div2'),
         new MenuItem(
           key: 'Settings',
           icon: 'action/settings',
-          onGestureTap: (event) => _navigator.pushNamed('/settings'),
+          onPressed: () => _navigator.pushNamed('/settings'),
           children: [new Text('Settings')]),
         new MenuItem(
           key: 'Help & Feedback',
           icon: 'action/help',
           children: [new Text('Help & Feedback')])
      ]
     );
   }
 
   Widget buildToolBar() {
     return new ToolBar(
         left: new IconButton(
           icon: 'navigation/menu_white',
-          onGestureTap: (_) => _drawerController.toggle()),
+          onPressed: _drawerController.toggle),
         center: new Text('Stocks', style: typography.white.title),
         right: [
           new IconButton(
             icon: 'action/search_white',
-            onGestureTap: _handleSearchBegin),
+            onPressed: _handleSearchBegin),
           new IconButton(
             icon: 'navigation/more_vert_white',
-            onGestureTap: _handleMenuShow)
+            onPressed: _handleMenuShow)
         ],
         backgroundColor: colors.Purple[500]
       );
   }
 
   // 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',
-        onGestureTap: _handleSearchEnd),
+        onPressed: _handleSearchEnd),
       center: new Input(
         focused: true,
         placeholder: 'Search stocks',
         onChanged: _handleSearchQueryChanged),
       backgroundColor: colors.Grey[50]
     );
   }
 
   void addMenuToOverlays(List<Widget> overlays) {
     if (_menuController == null)
@@ skipping 15 matching lines @@
         floatingActionButton: new FloatingActionButton(
           child: new Icon(type: 'content/add_white', size: 24)
         ),
         drawer: _drawerShowing ? buildDrawer() : null
       ),
     ];
     addMenuToOverlays(overlays);
     return new Stack(overlays);
   }
 }