Port big_switch.dart to fn3

examples/widgets/big_switch.dart

@@ -3,9 +3,19 @@
 // found in the LICENSE file.
 
 import 'package:sky/material.dart';
-import 'package:sky/widgets.dart';
+import 'package:sky/src/fn3.dart';
+
+class BigSwitch extends StatefulComponent {
+  BigSwitch({ this.scale });
+
+  final double scale;
+
+  BigSwitchState createState() => new BigSwitchState(this);
+}
+
+class BigSwitchState extends ComponentState<BigSwitch> {
+  BigSwitchState(BigSwitch config) : super(config);
 
-class BigSwitchApp extends App {
   bool _value = false;
 
   void _handleOnChanged(bool value) {
@@ -14,20 +24,22 @@ class BigSwitchApp extends App {
     });
   }
 
-  Widget build() {
+  Widget build(BuildContext context) {
     Matrix4 scale = new Matrix4.identity();
-    scale.scale(5.0, 5.0);
-    return new Container(
-        child: new Switch(value: _value, onChanged: _handleOnChanged),
-        padding: new EdgeDims.all(20.0),
-        transform: scale,
-        decoration: new BoxDecoration(
-          backgroundColor: Colors.teal[600]
-        )
+    scale.scale(config.scale, config.scale);
+    return new Transform(
+      transform: scale,
+      child: new Switch(value: _value, onChanged: _handleOnChanged)
     );
   }
 }
 
 void main() {
-  runApp(new BigSwitchApp());
+  runApp(new Container(
+    child: new BigSwitch(scale: 5.0),
+    padding: new EdgeDims.all(20.0),
+    decoration: new BoxDecoration(
+      backgroundColor: Colors.teal[600]
+    )
+  ));
 }

packages/flutter/lib/src/fn3.dart

@@ -4,7 +4,45 @@
 
 library fn3;
 
+export 'fn3/animated_component.dart';
 export 'fn3/basic.dart';
-export 'fn3/framework.dart';
 export 'fn3/binding.dart';
+export 'fn3/button_state.dart';
+export 'fn3/card.dart';
+export 'fn3/checkbox.dart';
+export 'fn3/date_picker.dart';
+export 'fn3/dialog.dart';
+export 'fn3/dismissable.dart';
+export 'fn3/drag_target.dart';
+export 'fn3/drawer.dart';
+export 'fn3/drawer_divider.dart';
+export 'fn3/drawer_header.dart';
+export 'fn3/drawer_item.dart';
+export 'fn3/flat_button.dart';
+export 'fn3/floating_action_button.dart';
+export 'fn3/focus.dart';
+export 'fn3/framework.dart';
+export 'fn3/gesture_detector.dart';
 export 'fn3/homogeneous_viewport.dart';
+export 'fn3/icon_button.dart';
+export 'fn3/icon.dart';
+export 'fn3/ink_well.dart';
+export 'fn3/material_button.dart';
+export 'fn3/material.dart';
+export 'fn3/navigator.dart';
+export 'fn3/popup_menu.dart';
+export 'fn3/popup_menu_item.dart';
+export 'fn3/progress_indicator.dart';
+export 'fn3/radio.dart';
+export 'fn3/raised_button.dart';
+export 'fn3/scaffold.dart';
+export 'fn3/scrollable.dart';
+export 'fn3/snack_bar.dart';
+export 'fn3/switch.dart';
+export 'fn3/tabs.dart';
+export 'fn3/theme.dart';
+export 'fn3/title.dart';
+export 'fn3/tool_bar.dart';
+export 'fn3/transitions.dart';
+
+export 'package:vector_math/vector_math.dart' show Matrix4;

packages/flutter/lib/src/fn3/switch.dart

@@ -27,24 +27,40 @@ const Duration _kCheckDuration = const Duration(milliseconds: 200);
 const Size _kSwitchSize = const Size(_kSwitchWidth + 2.0, _kSwitchHeight + 2.0);
 const double _kReactionRadius = _kSwitchWidth / 2.0;
 
-class Switch extends LeafRenderObjectWidget {
+class Switch extends StatelessComponent {
   Switch({ Key key, this.value, this.onChanged })
       : super(key: key);
 
   final bool value;
   final ValueChanged onChanged;
 
+  Widget build(BuildContext context) {
+    return new _SwitchWrapper(
+      value: value,
+      thumbColor: Theme.of(context).accentColor,
+      onChanged: onChanged
+    );
+  }
+}
+
+class _SwitchWrapper extends LeafRenderObjectWidget {
+  _SwitchWrapper({ Key key, this.value, this.thumbColor, this.onChanged })
+      : super(key: key);
+
+  final bool value;
+  final Color thumbColor;
+  final ValueChanged onChanged;
+
   _RenderSwitch createRenderObject() => new _RenderSwitch(
     value: value,
-    thumbColor: null,
+    thumbColor: thumbColor,
     onChanged: onChanged
   );
 
-  void updateRenderObject(_RenderSwitch renderObject, Switch oldWidget) {
+  void updateRenderObject(_RenderSwitch renderObject, _SwitchWrapper oldWidget) {
     renderObject.value = value;
+    renderObject.thumbColor = thumbColor;
     renderObject.onChanged = onChanged;
-    // TODO(abarth): How do we get the current theme here?
-    // renderObject.thumbColor = Theme.of(this).accentColor;
   }
 }