Refactor fn2.dart, since it breached our 1000-line threshold.

sky/examples/fn2/container.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 'dart:sky' as sky;
-import 'package:sky/framework/fn2.dart';
-import 'package:sky/framework/rendering/box.dart';
-import '../lib/solid_color_box.dart';
-
-class Rectangle extends RenderObjectWrapper {
-  RenderSolidColorBox root;
-  RenderSolidColorBox createNode() =>
-      new RenderSolidColorBox(color, desiredSize: new sky.Size(40.0, 130.0));
-
-  final int color;
-
-  Rectangle(this.color, { Object key }) : super(key: key);
-}
-
-class ContainerApp extends App {
-  UINode build() {
-    return new EventListenerNode(
-      new Block([
-        new Container(
-          padding: new EdgeDims.all(10.0),
-          margin: new EdgeDims.all(10.0),
-          height: 100.0,
-          decoration: new BoxDecoration(backgroundColor: const sky.Color(0xFF00FF00)),
-          child: new Block([
-            new Container(
-              decoration: new BoxDecoration(backgroundColor: const sky.Color(0xFFFFFF00)),
-              height: 20.0,
-            ),
-            new Image(src: "https://www.dartlang.org/logos/dart-logo.png",
-              size: new sky.Size(300.0, 300.0),
-              key: 1
-            ),
-          ])),
-      ]),
-      onPointerDown: _handlePointerDown,
-      onGestureTap: _handleGestureTap);
-  }
-
-  void _handlePointerDown(sky.PointerEvent event) {
-    print("_handlePointerDown");
-  }
-
-  void _handleGestureTap(sky.GestureEvent event) {
-    print("_handleGestureTap");
-  }
-}
-
-void main() {
-  new ContainerApp();
-}