Make Drawer in components2 work

sky/sdk/lib/framework/fn2.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.
 
 library fn;
 
 import 'app.dart';
 import 'dart:async';
 import 'dart:collection';
 import 'dart:mirrors';
 import 'dart:sky' as sky;
 import 'package:vector_math/vector_math.dart';
 import 'reflect.dart' as reflect;
 import 'rendering/block.dart';
 import 'rendering/box.dart';
 import 'rendering/flex.dart';
 import 'rendering/node.dart';
 import 'rendering/paragraph.dart';
+import 'rendering/stack.dart';
 
 // final sky.Tracing _tracing = sky.window.tracing;
 
 final bool _shouldLogRenderDuration = false;
 final bool _shouldTrace = false;
 
 enum _SyncOperation { IDENTICAL, INSERTION, STATEFUL, STATELESS, REMOVAL }
 
 /*
  * All Effen nodes derive from UINode. All nodes have a _parent, a _key and
@@ skipping 354 matching lines @@
 
 class SizedBox extends OneChildRenderNodeWrapper {
   RenderSizedBox root;
   final sky.Size desiredSize;
 
   SizedBox({ this.desiredSize, UINode child, Object key })
     : super(child: child, key: key);
 
   RenderSizedBox createNode() => new RenderSizedBox(desiredSize: desiredSize);
 
-  void syncRenderNode(DecoratedBox old) {
+  void syncRenderNode(SizedBox old) {
     super.syncRenderNode(old);
     root.desiredSize = desiredSize;
   }
 }
 
 class Transform extends OneChildRenderNodeWrapper {
   RenderTransform root;
   final Matrix4 transform;
 
   Transform({ this.transform, UINode child, Object key })
@@ skipping 180 matching lines @@
 }
 
 class BlockContainer extends OneChildListRenderNodeWrapper {
   RenderBlock root;
   RenderBlock createNode() => new RenderBlock();
 
   BlockContainer({ Object key, List<UINode> children })
     : super(key: key, children: children);
 }
 
+class StackContainer extends OneChildListRenderNodeWrapper {
+  RenderStack root;
+  RenderStack createNode() => new RenderStack();
+
+  StackContainer({ Object key, List<UINode> children })
+    : super(key: key, children: children);
+}
+
 class Paragraph extends RenderNodeWrapper {
   RenderParagraph root;
   RenderParagraph createNode() => new RenderParagraph(text: text);
 
   final String text;
 
   Paragraph({ Object key, this.text }) : super(key: key);
 
   void syncRenderNode(UINode old) {
     super.syncRenderNode(old);
@@ skipping 274 matching lines @@
     this.transform,
     this.margin,
     this.decoration,
     this.desiredSize,
     this.padding
   }) : super(key: key);
 
   UINode build() {
     UINode current = child;
 
-    if (transform != null)
-      current = new Transform(transform: transform, child: current);
-
     if (padding != null)
       current = new Padding(padding: padding, child: current);
 
     if (decoration != null)
       current = new DecoratedBox(decoration: decoration, child: current);
 
     if (desiredSize != null)
       current = new SizedBox(desiredSize: desiredSize, child: current);
 
     if (margin != null)
       current = new Padding(padding: margin, child: current);
 
+    if (transform != null)
+      current = new Transform(transform: transform, child: current);
+
     return current;
   }
 }
 
 class _AppView extends AppView {
   _AppView() : super(null);
 
   void dispatchPointerEvent(sky.PointerEvent event, HitTestResult result) {
     super.dispatchPointerEvent(event, result);
 
@@ skipping 27 matching lines @@
     assert(root.parent is RenderView);
   }
 }
 
 class Text extends Component {
   Text(this.data) : super(key: '*text*');
   final String data;
   bool get interchangeable => true;
   UINode build() => new Paragraph(text: data);
 }