remove spurious copy of the material_gallery directory (#3806)

examples/flutter_gallery/material_gallery/.gitignore

@@ -1,9 +0,0 @@
-.DS_Store
-.atom/
-.idea
-.packages
-.pub/
-build/
-ios/.generated/
-packages
-pubspec.lock

examples/flutter_gallery/material_gallery/README.md

@@ -1,12 +0,0 @@
-# Flutter gallery
-
-Demo app for the Material Design widgets and other features provided by Flutter.
-
-## Icon
-
-Icon was generated using Android Asset Studio:
-https://romannurik.github.io/AndroidAssetStudio/icons-launcher.html#foreground.type=image&foreground.space.trim=0&foreground.space.pad=0.1&foreColor=607d8b%2C0&crop=0&backgroundShape=square&backColor=ffffff%2C100&effects=none
-
-From the Flutter Logo:
-https://github.com/flutter/website/blob/master/_includes/logo.html
-which appears to be CC-BY 4.0.

examples/flutter_gallery/material_gallery/android/AndroidManifest.xml

@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- 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.
- -->
-<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="io.flutter.MaterialGallery" android:versionCode="1" android:versionName="0.0.1">
-
-    <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21" />
-    <uses-permission android:name="android.permission.INTERNET"/>
-
-    <application android:icon="@mipmap/ic_launcher" android:label="Flutter gallery" android:name="org.domokit.sky.shell.SkyApplication">
-        <activity android:configChanges="orientation|keyboardHidden|keyboard|screenSize" android:hardwareAccelerated="true" android:launchMode="singleTop" android:name="org.domokit.sky.shell.SkyActivity" android:theme="@android:style/Theme.Black.NoTitleBar">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity>
-    </application>
- </manifest>

examples/flutter_gallery/material_gallery/flutter.yaml

@@ -1,41 +0,0 @@
-name: flutter_gallery
-uses-material-design: true
-assets:
-  - assets/flutter_logo.png
-  - assets/section_animation.png
-  - assets/section_style.png
-  - assets/section_layout.png
-  - assets/section_components.png
-  - assets/section_patterns.png
-  - assets/section_usability.png
-  - packages/flutter_gallery_assets/ali_connors.png
-  - packages/flutter_gallery_assets/sun.png
-  - packages/flutter_gallery_assets/clouds-0.png
-  - packages/flutter_gallery_assets/clouds-1.png
-  - packages/flutter_gallery_assets/ray.png
-  - packages/flutter_gallery_assets/sun.png
-  - packages/flutter_gallery_assets/weathersprites.json
-  - packages/flutter_gallery_assets/weathersprites.png
-  - packages/flutter_gallery_assets/icon-sun.png
-  - packages/flutter_gallery_assets/icon-rain.png
-  - packages/flutter_gallery_assets/icon-snow.png
-  - packages/flutter_gallery_assets/kangaroo_valley_safari.png
-  - packages/flutter_gallery_assets/top_10_australian_beaches.png
-  - packages/flutter_gallery_assets/jumpingjack.json
-  - packages/flutter_gallery_assets/jumpingjack.png
-  - packages/flutter_gallery_assets/grain.png
-  - packages/flutter_gallery_assets/fancylines.png
-  - packages/flutter_gallery_assets/landscape_0.jpg
-  - packages/flutter_gallery_assets/landscape_1.jpg
-  - packages/flutter_gallery_assets/landscape_2.jpg
-  - packages/flutter_gallery_assets/landscape_3.jpg
-  - packages/flutter_gallery_assets/landscape_4.jpg
-  - packages/flutter_gallery_assets/landscape_5.jpg
-  - packages/flutter_gallery_assets/landscape_6.jpg
-  - packages/flutter_gallery_assets/landscape_7.jpg
-  - packages/flutter_gallery_assets/landscape_8.jpg
-  - packages/flutter_gallery_assets/landscape_9.jpg
-  - packages/flutter_gallery_assets/landscape_10.jpg
-  - packages/flutter_gallery_assets/landscape_11.jpg
-  - packages/flutter_gallery_assets/shadow.png
-  - lib/gallery/example_code.dart

examples/flutter_gallery/material_gallery/ios/.gitignore

@@ -1 +0,0 @@
-.generated/

examples/flutter_gallery/material_gallery/ios/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,142 +0,0 @@
-{
-  "images" : [
-    {
-      "size" : "29x29",
-      "idiom" : "iphone",
-      "filename" : "Icon-Small@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "iphone",
-      "filename" : "Icon-Small@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "iphone",
-      "filename" : "Icon-Small-40@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "iphone",
-      "filename" : "Icon-Small-40@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "60x60",
-      "idiom" : "iphone",
-      "filename" : "Icon-60@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "60x60",
-      "idiom" : "iphone",
-      "filename" : "Icon-60@3x.png",
-      "scale" : "3x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "ipad",
-      "filename" : "Icon-Small.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "29x29",
-      "idiom" : "ipad",
-      "filename" : "Icon-Small@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "ipad",
-      "filename" : "Icon-Small-40.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "40x40",
-      "idiom" : "ipad",
-      "filename" : "Icon-Small-40@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "76x76",
-      "idiom" : "ipad",
-      "filename" : "Icon-76.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "76x76",
-      "idiom" : "ipad",
-      "filename" : "Icon-76@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "83.5x83.5",
-      "idiom" : "ipad",
-      "filename" : "Icon-83.5@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "16x16",
-      "idiom" : "mac",
-      "filename" : "icon_16x16.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "16x16",
-      "idiom" : "mac",
-      "filename" : "icon_16x16@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "32x32",
-      "idiom" : "mac",
-      "filename" : "icon_32x32.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "32x32",
-      "idiom" : "mac",
-      "filename" : "icon_32x32@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "128x128",
-      "idiom" : "mac",
-      "filename" : "icon_128x128.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "128x128",
-      "idiom" : "mac",
-      "filename" : "icon_128x128@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "256x256",
-      "idiom" : "mac",
-      "filename" : "icon_256x256.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "256x256",
-      "idiom" : "mac",
-      "filename" : "icon_256x256@2x.png",
-      "scale" : "2x"
-    },
-    {
-      "size" : "512x512",
-      "idiom" : "mac",
-      "filename" : "icon_512x512.png",
-      "scale" : "1x"
-    },
-    {
-      "size" : "512x512",
-      "idiom" : "mac",
-      "filename" : "icon_512x512@2x.png",
-      "scale" : "2x"
-    }
-  ]
-}

examples/flutter_gallery/material_gallery/ios/Info.plist

@@ -1,47 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>CFBundleDevelopmentRegion</key>
-	<string>en</string>
-	<key>CFBundleExecutable</key>
-	<string>Runner</string>
-	<key>CFBundleIdentifier</key>
-	<string>io.flutter.materialgallery</string>
-	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
-	<key>CFBundleName</key>
-	<string>Flutter gallery</string>
-	<key>CFBundlePackageType</key>
-	<string>APPL</string>
-	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
-	<key>CFBundleSignature</key>
-	<string>????</string>
-	<key>CFBundleVersion</key>
-	<string>1</string>
-	<key>LSRequiresIPhoneOS</key>
-	<true/>
-	<key>UILaunchStoryboardName</key>
-	<string>LaunchScreen</string>
-	<key>UIRequiredDeviceCapabilities</key>
-	<array>
-		<string>arm64</string>
-	</array>
-	<key>UISupportedInterfaceOrientations</key>
-	<array>
-		<string>UIInterfaceOrientationPortrait</string>
-		<string>UIInterfaceOrientationLandscapeLeft</string>
-		<string>UIInterfaceOrientationLandscapeRight</string>
-	</array>
-	<key>UISupportedInterfaceOrientations~ipad</key>
-	<array>
-		<string>UIInterfaceOrientationPortrait</string>
-		<string>UIInterfaceOrientationPortraitUpsideDown</string>
-		<string>UIInterfaceOrientationLandscapeLeft</string>
-		<string>UIInterfaceOrientationLandscapeRight</string>
-	</array>
-	<key>UIViewControllerBasedStatusBarAppearance</key>
-	<false/>
-</dict>
-</plist>

examples/flutter_gallery/material_gallery/ios/LaunchScreen.storyboard

@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="9531" systemVersion="15C50" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" initialViewController="01J-lp-oVM">
-    <dependencies>
-        <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9529"/>
-    </dependencies>
-    <scenes>
-        <!--View Controller-->
-        <scene sceneID="EHf-IW-A2E">
-            <objects>
-                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
-                    <layoutGuides>
-                        <viewControllerLayoutGuide type="top" id="Llm-lL-Icb"/>
-                        <viewControllerLayoutGuide type="bottom" id="xb3-aO-Qok"/>
-                    </layoutGuides>
-                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
-                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
-                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
-                    </view>
-                </viewController>
-                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
-            </objects>
-            <point key="canvasLocation" x="53" y="375"/>
-        </scene>
-    </scenes>
-</document>

examples/flutter_gallery/material_gallery/lib/demo/all.dart

@@ -1,37 +0,0 @@
-// Copyright 2016 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.
-
-export 'buttons_demo.dart';
-export 'cards_demo.dart';
-export 'chip_demo.dart';
-export 'colors_demo.dart';
-export 'data_table_demo.dart';
-export 'date_picker_demo.dart';
-export 'dialog_demo.dart';
-export 'drawing_demo.dart';
-export 'drop_down_demo.dart';
-export 'fitness_demo.dart';
-export 'flexible_space_demo.dart';
-export 'grid_list_demo.dart';
-export 'icons_demo.dart';
-export 'leave_behind_demo.dart';
-export 'list_demo.dart';
-export 'menu_demo.dart';
-export 'modal_bottom_sheet_demo.dart';
-export 'overscroll_demo.dart';
-export 'page_selector_demo.dart';
-export 'persistent_bottom_sheet_demo.dart';
-export 'progress_indicator_demo.dart';
-export 'scrollable_tabs_demo.dart';
-export 'selection_controls_demo.dart';
-export 'slider_demo.dart';
-export 'snack_bar_demo.dart';
-export 'tabs_demo.dart';
-export 'tabs_fab_demo.dart';
-export 'text_field_demo.dart';
-export 'time_picker_demo.dart';
-export 'tooltip_demo.dart';
-export 'two_level_list_demo.dart';
-export 'typography_demo.dart';
-export 'weather_demo.dart';

examples/flutter_gallery/material_gallery/lib/demo/buttons_demo.dart

@@ -1,196 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-
-import '../gallery/demo.dart';
-
-const String _raisedText =
-  "# Raised buttons\n"
-  "Raised buttons add dimension to mostly flat layouts. They emphasize "
-  "functions on busy or wide spaces.";
-
-const String _raisedCode = 'buttons_raised';
-
-const String _flatText =
-  "# Flat buttons\n"
-  "A flat button displays an ink splash on press "
-  "but does not lift. Use flat buttons on toolbars, in dialogs and "
-  "inline with padding";
-
-const String _flatCode = 'buttons_flat';
-
-const String _dropdownText =
-  "# Dropdown buttons\n"
-  "A dropdown button displays a menu that's used to select a value from a "
-  "small set of values. The button displays the current value and a down "
-  "arrow.";
-
-const String _dropdownCode = 'buttons_dropdown';
-
-const String _iconText =
-  "IconButtons are appropriate for toggle buttons that allow a single choice to be "
-  "selected or deselected, such as adding or removing an item's star.";
-
-const String _iconCode = 'buttons_icon';
-
-const String _actionText =
-  "# Floating action buttons\n"
-  "Floating action buttons are used for a promoted action. They are "
-  "distinguished by a circled icon floating above the UI and can have motion "
-  "behaviors that include morphing, launching, and a transferring anchor "
-  "point.";
-
-const String _actionCode = 'buttons_action';
-
-class ButtonsDemo extends StatefulWidget {
-  static const String routeName = '/buttons';
-
-  @override
-  _ButtonsDemoState createState() => new _ButtonsDemoState();
-}
-
-class _ButtonsDemoState extends State<ButtonsDemo> {
-  @override
-  Widget build(BuildContext context) {
-    List<ComponentDemoTabData> demos = <ComponentDemoTabData>[
-      new ComponentDemoTabData(
-        tabName: 'RAISED',
-        description: _raisedText,
-        widget: buildRaisedButton(),
-        exampleCodeTag: _raisedCode
-      ),
-      new ComponentDemoTabData(
-        tabName: 'FLAT',
-        description: _flatText,
-        widget: buildFlatButton(),
-        exampleCodeTag: _flatCode
-      ),
-      new ComponentDemoTabData(
-        tabName: 'DROPDOWN',
-        description: _dropdownText,
-        widget: buildDropdownButton(),
-        exampleCodeTag: _dropdownCode
-      ),
-      new ComponentDemoTabData(
-        tabName: 'ICON',
-        description: _iconText,
-        widget: buildIconButton(),
-        exampleCodeTag: _iconCode
-      ),
-      new ComponentDemoTabData(
-        tabName: 'ACTION',
-        description: _actionText,
-        widget: buildActionButton(),
-        exampleCodeTag: _actionCode
-      ),
-    ];
-
-    return new TabbedComponentDemoScaffold(
-      title: 'Buttons',
-      demos: demos
-    );
-  }
-
-  Widget buildRaisedButton() {
-    return new Align(
-      alignment: new FractionalOffset(0.5, 0.4),
-      child: new ButtonBar(
-        alignment: MainAxisAlignment.collapse,
-        children: <Widget>[
-          new RaisedButton(
-            child: new Text('RAISED BUTTON'),
-            onPressed: () {
-              // Perform some action
-            }
-          ),
-          new RaisedButton(
-            child: new Text('DISABLED')
-          )
-        ]
-      )
-    );
-  }
-
-  Widget buildFlatButton() {
-    return new Align(
-      alignment: new FractionalOffset(0.5, 0.4),
-      child: new ButtonBar(
-        alignment: MainAxisAlignment.collapse,
-        children: <Widget>[
-          new FlatButton(
-            child: new Text('FLAT BUTTON'),
-            onPressed: () {
-              // Perform some action
-            }
-          ),
-          new FlatButton(
-            child: new Text('DISABLED')
-          )
-        ]
-      )
-    );
-  }
-
-  String dropdownValue = 'Free';
-
-  Widget buildDropdownButton() {
-    return new Align(
-      alignment: new FractionalOffset(0.5, 0.4),
-      child: new DropDownButton<String>(
-        value: dropdownValue,
-        onChanged: (String newValue) {
-          setState(() {
-            if (newValue != null)
-              dropdownValue = newValue;
-          });
-        },
-        items: <String>['One', 'Two', 'Free', 'Four']
-          .map((String value) {
-            return new DropDownMenuItem<String>(
-              value: value,
-              child: new Text(value));
-          })
-          .toList()
-      )
-    );
-  }
-
-  bool iconButtonToggle = false;
-
-  Widget buildIconButton() {
-    return new Align(
-      alignment: new FractionalOffset(0.5, 0.4),
-      child: new Row(
-        mainAxisAlignment: MainAxisAlignment.collapse,
-        children: <Widget>[
-          new IconButton(
-            icon: Icons.thumb_up,
-            onPressed: () {
-              setState(() => iconButtonToggle = !iconButtonToggle);
-            },
-            color: iconButtonToggle ? Theme.of(context).primaryColor : null
-          ),
-          new IconButton(
-            icon: Icons.thumb_up
-          )
-        ]
-        .map((Widget button) => new SizedBox(width: 64.0, height: 64.0, child: button))
-        .toList()
-      )
-    );
-  }
-
-  Widget buildActionButton() {
-    return new Align(
-      alignment: new FractionalOffset(0.5, 0.4),
-      child: new FloatingActionButton(
-        child: new Icon(icon: Icons.add),
-        onPressed: () {
-          // Perform some action
-        }
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/cards_demo.dart

@@ -1,143 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:flutter/widgets.dart';
-
-class TravelDestination {
-  const TravelDestination({ this.assetName, this.title, this.description });
-
-  final String assetName;
-  final String title;
-  final List<String> description;
-
-  bool get isValid => assetName != null && title != null && description?.length == 3;
-}
-
-final List<TravelDestination> destinations = <TravelDestination>[
-  const TravelDestination(
-    assetName: 'packages/flutter_gallery_assets/top_10_australian_beaches.png',
-    title: 'Top 10 Australian beaches',
-    description: const <String>[
-      'Number 10',
-      'Whitehaven Beach',
-      'Whitsunday Island, Whitsunday Islands'
-    ]
-  ),
-  const TravelDestination(
-    assetName: 'packages/flutter_gallery_assets/kangaroo_valley_safari.png',
-    title: 'Kangaroo Valley Safari',
-    description: const <String>[
-      '2031 Moss Vale Road',
-      'Kangaroo Valley 2577',
-      'New South Wales'
-    ]
-  )
-];
-
-class TravelDestinationItem extends StatelessWidget {
-  TravelDestinationItem({ Key key, this.destination }) : super(key: key) {
-    assert(destination != null && destination.isValid);
-  }
-
-  static final double height = 328.0;
-  final TravelDestination destination;
-
-  @override
-  Widget build(BuildContext context) {
-    ThemeData theme = Theme.of(context);
-    TextStyle titleStyle = theme.textTheme.headline.copyWith(color: Colors.white);
-    TextStyle descriptionStyle = theme.textTheme.subhead;
-
-    return new SizedBox(
-      height: height,
-      child: new Card(
-        child: new Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: <Widget>[
-            // photo and title
-            new SizedBox(
-              height: 184.0,
-              child: new Stack(
-                children: <Widget>[
-                  new Positioned(
-                    left: 0.0,
-                    top: 0.0,
-                    bottom: 0.0,
-                    right: 0.0,
-                    child: new AssetImage(
-                      name: destination.assetName,
-                      fit: ImageFit.cover
-                    )
-                  ),
-                  new Positioned(
-                    bottom: 16.0,
-                    left: 16.0,
-                    child: new Text(destination.title, style: titleStyle)
-                  )
-                ]
-              )
-            ),
-            // description and share/expore buttons
-            new Flexible(
-              child: new Padding(
-                padding: const EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 0.0),
-                child: new Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: <Widget>[
-                    // three line description
-                    new Text(destination.description[0], style: descriptionStyle),
-                    new Text(destination.description[1], style: descriptionStyle),
-                    new Text(destination.description[2], style: descriptionStyle),
-                  ]
-                )
-              )
-            ),
-            // share, explore buttons
-            // TODO(abarth): The theme and the bar should be part of card.
-            new ButtonTheme.footer(
-              child: new ButtonBar(
-                alignment: MainAxisAlignment.start,
-                children: <Widget>[
-                  new FlatButton(
-                    child: new Text('SHARE'),
-                    onPressed: () { /* do nothing */ }
-                  ),
-                  new FlatButton(
-                    child: new Text('EXPLORE'),
-                    onPressed: () { /* do nothing */ }
-                  ),
-                ]
-              )
-            ),
-          ]
-        )
-      )
-    );
-  }
-}
-
-class CardsDemo extends StatelessWidget {
-  static const String routeName = '/cards';
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('Travel stream')
-      ),
-      body: new ScrollableList(
-        itemExtent: TravelDestinationItem.height,
-        padding: const EdgeInsets.only(top: 8.0, left: 8.0, right: 8.0),
-        children: destinations.map((TravelDestination destination) {
-          return new Container(
-            margin: const EdgeInsets.only(bottom: 8.0),
-            child: new TravelDestinationItem(destination: destination)
-          );
-        })
-        .toList()
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/chip_demo.dart

@@ -1,54 +0,0 @@
-// 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:flutter/material.dart';
-
-class ChipDemo extends StatefulWidget {
-  static const String routeName = '/chip';
-
-  @override
-  _ChipDemoState createState() => new _ChipDemoState();
-}
-
-class _ChipDemoState extends State<ChipDemo> {
-  bool _showBananas = true;
-
-  void _deleteBananas() {
-    setState(() {
-      _showBananas = false;
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    List<Widget> chips = <Widget>[
-      new Chip(
-        label: new Text('Apple')
-      ),
-      new Chip(
-        avatar: new CircleAvatar(child: new Text('B')),
-        label: new Text('Blueberry')
-      ),
-    ];
-
-    if (_showBananas) {
-      chips.add(new Chip(
-        label: new Text('Bananas'),
-        onDeleted: _deleteBananas
-      ));
-    }
-
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Chips')),
-      body: new Block(
-        children: chips.map((Widget widget) {
-          return new Container(
-            height: 100.0,
-            child: new Center(child: widget)
-          );
-        }).toList()
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/colors_demo.dart

@@ -1,138 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:flutter/widgets.dart';
-
-const double kColorItemHeight = 48.0;
-
-class ColorSwatch {
-  const ColorSwatch({ this.name, this.colors, this.accentColors, this.threshold: 900});
-
-  final String name;
-  final Map<int, Color> colors;
-  final Map<int, Color> accentColors;
-  final int threshold; // titles for indices > threshold are white, otherwise black
-
-  bool get isValid => this.name != null && this.colors != null && threshold != null;
-}
-
-const List<ColorSwatch> colorSwatches = const <ColorSwatch>[
-  const ColorSwatch(name: 'RED', colors: Colors.red, accentColors: Colors.redAccent, threshold: 300),
-  const ColorSwatch(name: 'PINK', colors: Colors.pink, accentColors: Colors.pinkAccent, threshold: 200),
-  const ColorSwatch(name: 'PURPLE', colors: Colors.purple, accentColors: Colors.purpleAccent, threshold: 200),
-  const ColorSwatch(name: 'DEEP PURPLE', colors: Colors.deepPurple, accentColors: Colors.deepPurpleAccent, threshold: 200),
-  const ColorSwatch(name: 'INDIGO', colors: Colors.indigo, accentColors: Colors.indigoAccent, threshold: 200),
-  const ColorSwatch(name: 'BLUE', colors: Colors.blue, accentColors: Colors.blueAccent, threshold: 400),
-  const ColorSwatch(name: 'LIGHT BLUE', colors: Colors.lightBlue, accentColors: Colors.lightBlueAccent, threshold: 500),
-  const ColorSwatch(name: 'CYAN', colors: Colors.cyan, accentColors: Colors.cyanAccent, threshold: 600),
-  const ColorSwatch(name: 'TEAL', colors: Colors.teal, accentColors: Colors.tealAccent, threshold: 400),
-  const ColorSwatch(name: 'GREEN', colors: Colors.green, accentColors: Colors.greenAccent, threshold: 500),
-  const ColorSwatch(name: 'LIGHT GREEN', colors: Colors.lightGreen, accentColors: Colors.lightGreenAccent, threshold: 600),
-  const ColorSwatch(name: 'LIME', colors: Colors.lime, accentColors: Colors.limeAccent, threshold: 800),
-  const ColorSwatch(name: 'YELLOW', colors: Colors.yellow, accentColors: Colors.yellowAccent),
-  const ColorSwatch(name: 'AMBER', colors: Colors.amber, accentColors: Colors.amberAccent),
-  const ColorSwatch(name: 'ORANGE', colors: Colors.orange, accentColors: Colors.orangeAccent, threshold: 700),
-  const ColorSwatch(name: 'DEEP ORANGE', colors: Colors.deepOrange, accentColors: Colors.deepOrangeAccent, threshold: 400),
-  const ColorSwatch(name: 'BROWN', colors: Colors.brown, threshold: 200),
-  const ColorSwatch(name: 'GREY', colors: Colors.grey, threshold: 500),
-  const ColorSwatch(name: 'BLUE GREY', colors: Colors.blueGrey, threshold: 500)
-];
-
-
-class ColorItem extends StatelessWidget {
-  ColorItem({ Key key, this.index, this.color, this.prefix: '' }) : super(key: key) {
-    assert(index != null);
-    assert(color != null);
-    assert(prefix != null);
-  }
-
-  final int index;
-  final Color color;
-  final String prefix;
-
-  String colorString() => "#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
-
-  @override
-  Widget build(BuildContext context) {
-    return new Container(
-      height: kColorItemHeight,
-      padding: const EdgeInsets.symmetric(horizontal: 16.0),
-      decoration: new BoxDecoration(backgroundColor: color),
-      child: new Row(
-        mainAxisAlignment: MainAxisAlignment.spaceBetween,
-        crossAxisAlignment: CrossAxisAlignment.center,
-        children: <Widget>[
-          new Text('$prefix$index'),
-          new Text(colorString())
-        ]
-      )
-    );
-  }
-}
-
-class ColorSwatchTabView extends StatelessWidget {
-  ColorSwatchTabView({ Key key, this.swatch }) : super(key: key) {
-    assert(swatch != null && swatch.isValid);
-  }
-
-  final ColorSwatch swatch;
-  final TextStyle blackTextStyle = Typography.black.body1;
-  final TextStyle whiteTextStyle = Typography.white.body1;
-
-  @override
-  Widget build(BuildContext context) {
-    List<Widget> colorItems =  swatch.colors.keys.map((int index) {
-      return new DefaultTextStyle(
-        style: index > swatch.threshold ? whiteTextStyle : blackTextStyle,
-        child: new ColorItem(index: index, color: swatch.colors[index])
-      );
-    })
-    .toList();
-
-    if (swatch.accentColors != null) {
-      colorItems.addAll(swatch.accentColors.keys.map((int index) {
-        return new DefaultTextStyle(
-          style: index > swatch.threshold ? whiteTextStyle : blackTextStyle,
-          child: new ColorItem(index: index, color: swatch.accentColors[index], prefix: 'A')
-        );
-      })
-      .toList());
-    }
-
-    return new ScrollableList(
-      itemExtent: kColorItemHeight,
-      children: colorItems
-    );
-  }
-}
-
-class ColorsDemo extends StatelessWidget {
-  static const String routeName = '/colors';
-
-  @override
-  Widget build(BuildContext context) {
-    return new TabBarSelection<ColorSwatch>(
-      values: colorSwatches,
-      child: new Scaffold(
-        appBar: new AppBar(
-          elevation: 0,
-          title: new Text('Colors'),
-          tabBar: new TabBar<ColorSwatch>(
-            isScrollable: true,
-            labels: new Map<ColorSwatch, TabLabel>.fromIterable(colorSwatches, value: (ColorSwatch swatch) {
-              return new TabLabel(text: swatch.name);
-            })
-          )
-        ),
-        body: new TabBarView<ColorSwatch>(
-          children: colorSwatches.map((ColorSwatch swatch) {
-            return new ColorSwatchTabView(swatch: swatch);
-          })
-          .toList()
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/data_table_demo.dart

@@ -1,147 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:flutter/rendering.dart';
-
-class Desert {
-  Desert(this.name, this.calories, this.fat, this.carbs, this.protein, this.sodium, this.calcium, this.iron);
-  final String name;
-  final int calories;
-  final double fat;
-  final int carbs;
-  final double protein;
-  final int sodium;
-  final int calcium;
-  final int iron;
-
-  bool selected = false;
-}
-
-class DataTableDemo extends StatefulWidget {
-  static const String routeName = '/data-table';
-
-  @override
-  _DataTableDemoState createState() => new _DataTableDemoState();
-}
-
-class _DataTableDemoState extends State<DataTableDemo> {
-
-  int _sortColumnIndex;
-  bool _sortAscending = true;
-
-  final List<Desert> _deserts = <Desert>[
-    new Desert('Frozen yogurt',      159,  6.0, 24, 4.0,  87, 14,  1),
-    new Desert('Ice cream sandwich', 237,  9.0, 37, 4.3, 129,  8,  1),
-    new Desert('Eclair',             262, 16.0, 24, 6.0, 337,  6,  7),
-    new Desert('Cupcake',            305,  3.7, 67, 4.3, 413,  3,  8),
-    new Desert('Gingerbread',        356, 16.0, 49, 3.9, 327,  7, 16),
-    new Desert('Jelly bean',         375,  0.0, 94, 0.0,  50,  0,  0),
-    new Desert('Lollipop',           392,  0.2, 98, 0.0,  38,  0,  2),
-    new Desert('Honeycomb',          408,  3.2, 87, 6.5, 562,  0, 45),
-    new Desert('Donut',              452, 25.0, 51, 4.9, 326,  2, 22),
-    new Desert('KitKat',             518, 26.0, 65, 7.0,  54, 12,  6),
-  ];
-
-  void _sort/*<T>*/(Comparable<dynamic/*=T*/> getField(Desert d), int columnIndex, bool ascending) {
-    setState(() {
-      _deserts.sort((Desert a, Desert b) {
-        if (!ascending) {
-          final Desert c = a;
-          a = b;
-          b = c;
-        }
-        final Comparable<dynamic/*=T*/> aValue = getField(a);
-        final Comparable<dynamic/*=T*/> bValue = getField(b);
-        return Comparable.compare(aValue, bValue);
-      });
-      _sortColumnIndex = columnIndex;
-      _sortAscending = ascending;
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Data tables')),
-      body: new Block(
-        children: <Widget>[
-          new Material(
-            child: new IntrinsicHeight(
-              child: new Block(
-                scrollDirection: Axis.horizontal,
-                children: <Widget>[
-                  new DataTable(
-                    sortColumnIndex: _sortColumnIndex,
-                    sortAscending: _sortAscending,
-                    columns: <DataColumn>[
-                      new DataColumn(
-                        label: new Text('Dessert (100g serving)'),
-                        onSort: (int columnIndex, bool ascending) => _sort/*<String>*/((Desert d) => d.name, columnIndex, ascending)
-                      ),
-                      new DataColumn(
-                        label: new Text('Calories'),
-                        tooltip: 'The total amount of food energy in the given serving size.',
-                        numeric: true,
-                        onSort: (int columnIndex, bool ascending) => _sort/*<num>*/((Desert d) => d.calories, columnIndex, ascending)
-                      ),
-                      new DataColumn(
-                        label: new Text('Fat (g)'),
-                        numeric: true,
-                        onSort: (int columnIndex, bool ascending) => _sort/*<num>*/((Desert d) => d.fat, columnIndex, ascending)
-                      ),
-                      new DataColumn(
-                        label: new Text('Carbs (g)'),
-                        numeric: true,
-                        onSort: (int columnIndex, bool ascending) => _sort/*<num>*/((Desert d) => d.carbs, columnIndex, ascending)
-                      ),
-                      new DataColumn(
-                        label: new Text('Protein (g)'),
-                        numeric: true,
-                        onSort: (int columnIndex, bool ascending) => _sort/*<num>*/((Desert d) => d.protein, columnIndex, ascending)
-                      ),
-                      new DataColumn(
-                        label: new Text('Sodium (mg)'),
-                        numeric: true,
-                        onSort: (int columnIndex, bool ascending) => _sort/*<num>*/((Desert d) => d.sodium, columnIndex, ascending)
-                      ),
-                      new DataColumn(
-                        label: new Text('Calcium (%)'),
-                        tooltip: 'The amount of calcium as a percentage of the recommended daily amount.',
-                        numeric: true,
-                        onSort: (int columnIndex, bool ascending) => _sort/*<num>*/((Desert d) => d.calcium, columnIndex, ascending)
-                      ),
-                      new DataColumn(
-                        label: new Text('Iron (%)'),
-                        numeric: true,
-                        onSort: (int columnIndex, bool ascending) => _sort/*<num>*/((Desert d) => d.iron, columnIndex, ascending)
-                      ),
-                    ],
-                    rows: _deserts.map/*<DataRow>*/((Desert desert) {
-                      return new DataRow(
-                        key: new ValueKey<Desert>(desert),
-                        selected: desert.selected,
-                        onSelectChanged: (bool selected) { setState(() { desert.selected = selected; }); },
-                        cells: <DataCell>[
-                          new DataCell(new Text('${desert.name}')),
-                          new DataCell(new Text('${desert.calories}')),
-                          new DataCell(new Text('${desert.fat.toStringAsFixed(1)}')),
-                          new DataCell(new Text('${desert.carbs}')),
-                          new DataCell(new Text('${desert.protein.toStringAsFixed(1)}')),
-                          new DataCell(new Text('${desert.sodium}')),
-                          new DataCell(new Text('${desert.calcium}%')),
-                          new DataCell(new Text('${desert.iron}%')),
-                        ]
-                      );
-                    }).toList(growable: false)
-                  )
-                ]
-              )
-            )
-          )
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/date_picker_demo.dart

@@ -1,52 +0,0 @@
-// 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:async';
-
-import 'package:flutter/material.dart';
-import 'package:intl/intl.dart';
-
-class DatePickerDemo extends StatefulWidget {
-  static const String routeName = '/date-picker';
-
-  @override
-  _DatePickerDemoState createState() => new _DatePickerDemoState();
-}
-
-class _DatePickerDemoState extends State<DatePickerDemo> {
-  DateTime _selectedDate = new DateTime.now();
-
-  Future<Null> _handleSelectDate() async {
-    DateTime picked = await showDatePicker(
-      context: context,
-      initialDate: _selectedDate,
-      firstDate: new DateTime(2015, 8),
-      lastDate: new DateTime(2101)
-    );
-    if (picked != _selectedDate) {
-      setState(() {
-        _selectedDate = picked;
-      });
-    }
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return
-      new Scaffold(
-      appBar: new AppBar(title: new Text('Date picker')),
-      body: new Column(
-        children: <Widget>[
-          new Text(new DateFormat.yMMMd().format(_selectedDate)),
-          new SizedBox(height: 20.0),
-          new RaisedButton(
-            onPressed: _handleSelectDate,
-            child: new Text('SELECT DATE')
-          ),
-        ],
-        mainAxisAlignment: MainAxisAlignment.center
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/dialog_demo.dart

@@ -1,203 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:flutter/widgets.dart';
-
-import 'full_screen_dialog_demo.dart';
-
-enum DialogDemoAction {
-  cancel,
-  discard,
-  disagree,
-  agree,
-}
-
-const String _alertWithoutTitleText = "Discard draft?";
-
-const String _alertWithTitleText =
-  "Let Google help apps determine location. This means sending anyonmous location "
-  "data to Google, even when no apps are running.";
-
-class DialogDemoItem extends StatelessWidget {
-  DialogDemoItem({ Key key, this.icon, this.color, this.text, this.onPressed }) : super(key: key);
-
-  final IconData icon;
-  final Color color;
-  final String text;
-  final VoidCallback onPressed;
-
-  @override
-  Widget build(BuildContext context) {
-    return new InkWell(
-      onTap: onPressed,
-      child: new Padding(
-        padding: const EdgeInsets.symmetric(vertical: 8.0),
-        child: new Row(
-          mainAxisAlignment: MainAxisAlignment.start,
-          crossAxisAlignment: CrossAxisAlignment.center,
-          children: <Widget>[
-            new Icon(
-              size: 36.0,
-              icon: icon,
-              color: color
-            ),
-            new Padding(
-              padding: const EdgeInsets.only(left: 16.0),
-              child: new Text(text)
-            )
-          ]
-        )
-      )
-    );
-  }
-}
-
-class DialogDemo extends StatefulWidget {
-  static const String routeName = '/dialog';
-
-  @override
-  DialogDemoState createState() => new DialogDemoState();
-}
-
-class DialogDemoState extends State<DialogDemo> {
-  final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
-
-  void showDemoDialog/*<T>*/({ BuildContext context, Dialog dialog }) {
-    showDialog/*<T>*/(
-      context: context,
-      child: dialog
-    )
-    .then((dynamic/*=T*/ value) { // The value passed to Navigator.pop() or null.
-      if (value != null) {
-        _scaffoldKey.currentState.showSnackBar(new SnackBar(
-          content: new Text('You selected: $value')
-        ));
-      }
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final ThemeData theme = Theme.of(context);
-    final TextStyle dialogTextStyle = theme.textTheme.subhead.copyWith(color: theme.textTheme.caption.color);
-
-    return new Scaffold(
-      key: _scaffoldKey,
-      appBar: new AppBar(
-        title: new Text('Dialogs')
-      ),
-      body: new Block(
-        padding: const EdgeInsets.symmetric(vertical: 24.0, horizontal: 72.0),
-        children: <Widget>[
-          new RaisedButton(
-            child: new Text('ALERT'),
-            onPressed: () {
-              showDemoDialog/*<DialogDemoAction>*/(
-                context: context,
-                dialog: new Dialog(
-                  content: new Text(
-                    _alertWithoutTitleText,
-                    style: dialogTextStyle
-                  ),
-                  actions: <Widget>[
-                    new FlatButton(
-                      child: new Text('CANCEL'),
-                      onPressed: () { Navigator.pop(context, DialogDemoAction.cancel); }
-                    ),
-                    new FlatButton(
-                      child: new Text('DISCARD'),
-                      onPressed: () { Navigator.pop(context, DialogDemoAction.discard); }
-                    )
-                  ]
-                )
-              );
-            }
-          ),
-          new RaisedButton(
-            child: new Text('ALERT WITH TITLE'),
-            onPressed: () {
-              showDemoDialog/*<DialogDemoAction>*/(
-                context: context,
-                dialog: new Dialog(
-                  title: new Text('Use Google\'s location service?'),
-                  content: new Text(
-                    _alertWithTitleText,
-                    style: dialogTextStyle
-                  ),
-                  actions: <Widget>[
-                    new FlatButton(
-                      child: new Text('DISAGREE'),
-                      onPressed: () { Navigator.pop(context, DialogDemoAction.disagree); }
-                    ),
-                    new FlatButton(
-                      child: new Text('AGREE'),
-                      onPressed: () { Navigator.pop(context, DialogDemoAction.agree); }
-                    )
-                  ]
-                )
-              );
-            }
-          ),
-          new RaisedButton(
-            child: new Text('SIMPLE'),
-            onPressed: () {
-              showDemoDialog/*<String>*/(
-                context: context,
-                dialog: new Dialog(
-                  title: new Text('Set backup account'),
-                  content: new Column(
-                    children: <Widget>[
-                      new DialogDemoItem(
-                        icon: Icons.account_circle,
-                        color: theme.primaryColor,
-                        text: 'username@gmail.com',
-                        onPressed: () { Navigator.pop(context, 'username@gmail.com'); }
-                      ),
-                      new DialogDemoItem(
-                        icon: Icons.account_circle,
-                        color: theme.primaryColor,
-                        text: 'user02@gmail.com',
-                        onPressed: () { Navigator.pop(context, 'user02@gmail.com'); }
-                      ),
-                      new DialogDemoItem(
-                        icon: Icons.add_circle,
-                        text: 'add account',
-                        color: theme.disabledColor
-                      )
-                    ]
-                  )
-                )
-              );
-            }
-          ),
-          new RaisedButton(
-            child: new Text('CONFIRMATION'),
-            onPressed: () {
-              showTimePicker(
-                context: context,
-                initialTime: const TimeOfDay(hour: 15, minute: 30)
-              )
-              .then((TimeOfDay value) { // The value passed to Navigator.pop() or null.
-                if (value != null) {
-                  _scaffoldKey.currentState.showSnackBar(new SnackBar(
-                    content: new Text('You selected: $value')
-                  ));
-                }
-              });
-            }
-          ),
-          new RaisedButton(
-            child: new Text('FULLSCREEN'),
-            onPressed: () {
-              Navigator.push(context, new MaterialPageRoute<DismissDialogAction>(
-                builder: (BuildContext context) => new FullScreenDialogDemo()
-              ));
-            }
-          )
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/drawing_demo.dart

@@ -1,85 +0,0 @@
-// Copyright 2016 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:async';
-
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-
-import 'package:flutter_sprites/flutter_sprites.dart';
-
-class DrawingDemo extends StatefulWidget {
-  static const String routeName = '/drawing';
-
-  @override
-  _DrawingDemoState createState() => new _DrawingDemoState();
-}
-
-class _DrawingDemoState extends State<DrawingDemo> {
-  _LineDrawingNode _rootNode;
-  ImageMap _images;
-
-  Future<Null> _loadAssets(AssetBundle bundle) async {
-    _images = new ImageMap(bundle);
-    await _images.load(<String>[
-      'packages/flutter_gallery_assets/fancylines.png'
-    ]);
-  }
-
-  @override
-  void initState() {
-    super.initState();
-    _loadAssets(DefaultAssetBundle.of(context)).then((_) {
-      setState(() {
-        _rootNode = new _LineDrawingNode(_images);
-      });
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    Widget body;
-    if (_rootNode == null) {
-      body = new Center(
-        child: new CircularProgressIndicator()
-      );
-    } else {
-      body = new SpriteWidget(_rootNode, SpriteBoxTransformMode.nativePoints);
-    }
-
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('Fancy lines')
-      ),
-      body: body
-    );
-  }
-}
-
-class _LineDrawingNode extends NodeWithSize {
-  _LineDrawingNode(this._images) : super(const Size(1024.0, 1024.0)) {
-    userInteractionEnabled = true;
-  }
-
-  final ImageMap _images;
-  EffectLine _currentLine;
-
-  @override
-  bool handleEvent(SpriteBoxEvent event) {
-    if (event.type == PointerDownEvent) {
-      _currentLine = new EffectLine(
-        texture: new Texture(_images['packages/flutter_gallery_assets/fancylines.png']),
-        colorSequence: new ColorSequence.fromStartAndEndColor(Colors.purple[500], Colors.purple[600]),
-        fadeAfterDelay: 3.0,
-        fadeDuration: 1.0
-      );
-      _currentLine.addPoint(event.boxPosition);
-      addChild(_currentLine);
-    } else if (event.type == PointerMoveEvent) {
-      _currentLine.addPoint(event.boxPosition);
-    }
-
-    return true;
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/drop_down_demo.dart

@@ -1,42 +0,0 @@
-// 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:flutter/material.dart';
-
-class DropDownDemo extends StatefulWidget {
-  static const String routeName = '/dropdown';
-
-  @override
-  _DropDownDemoState createState() => new _DropDownDemoState();
-}
-
-class _DropDownDemoState extends State<DropDownDemo> {
-  String _value = "Free";
-
-  List<DropDownMenuItem<String>> buildItems() {
-    return <String>["One", "Two", "Free", "Four"].map((String value) {
-      return new DropDownMenuItem<String>(value: value, child: new Text(value));
-    })
-    .toList();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Drop-down button')),
-      body: new Center(
-        child: new DropDownButton<String>(
-          items: buildItems(),
-          value: _value,
-          onChanged: (String newValue) {
-            setState(() {
-              if (newValue != null)
-                _value = newValue;
-            });
-          }
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/fitness_demo.dart

@@ -1,589 +0,0 @@
-// 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:async';
-import 'dart:math' as math;
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:flutter_sprites/flutter_sprites.dart';
-
-ImageMap _images;
-SpriteSheet _sprites;
-
-class FitnessDemo extends StatelessWidget {
-  FitnessDemo({ Key key }) : super(key: key);
-
-  static const String routeName = '/fitness';
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('Fitness')
-      ),
-      body: new _FitnessDemoContents()
-    );
-  }
-}
-
-class _FitnessDemoContents extends StatefulWidget {
-  _FitnessDemoContents({ Key key }) : super(key: key);
-
-  @override
-  _FitnessDemoContentsState createState() => new _FitnessDemoContentsState();
-}
-
-class _FitnessDemoContentsState extends State<_FitnessDemoContents> {
-
-  Future<Null> _loadAssets(AssetBundle bundle) async {
-    _images = new ImageMap(bundle);
-    await _images.load(<String>[
-      'packages/flutter_gallery_assets/jumpingjack.png',
-    ]);
-
-    String json = await DefaultAssetBundle.of(context).loadString('packages/flutter_gallery_assets/jumpingjack.json');
-    _sprites = new SpriteSheet(_images['packages/flutter_gallery_assets/jumpingjack.png'], json);
-  }
-
-  @override
-  void initState() {
-    super.initState();
-
-    AssetBundle bundle = DefaultAssetBundle.of(context);
-    _loadAssets(bundle).then((_) {
-      setState(() {
-        _assetsLoaded = true;
-        workoutAnimation = new _WorkoutAnimationNode(
-          onPerformedJumpingJack: () {
-            setState(() {
-              _count += 1;
-            });
-          },
-          onSecondPassed: (int seconds) {
-            setState(() {
-              _time = seconds;
-            });
-          }
-        );
-      });
-    });
-  }
-
-  bool _assetsLoaded = false;
-  int _count = 0;
-  int _time = 0;
-  int get kcal => (_count * 0.2).toInt();
-
-  _WorkoutAnimationNode workoutAnimation;
-
-  @override
-  Widget build(BuildContext context) {
-    if (!_assetsLoaded)
-      return new Container();
-
-    Color buttonColor;
-    String buttonText;
-    VoidCallback onButtonPressed;
-
-    if (workoutAnimation.workingOut) {
-      buttonColor = Colors.red[500];
-      buttonText = "STOP WORKOUT";
-      onButtonPressed = endWorkout;
-    } else {
-      buttonColor = Theme.of(context).primaryColor;
-      buttonText = "START WORKOUT";
-      onButtonPressed = startWorkout;
-    }
-
-    return new Material(
-      child: new Column(
-        mainAxisAlignment: MainAxisAlignment.center,
-        children: <Widget>[
-          new Flexible(
-            child: new Container(
-              decoration: new BoxDecoration(backgroundColor: Colors.grey[800]),
-              child: new SpriteWidget(workoutAnimation, SpriteBoxTransformMode.scaleToFit)
-            )
-          ),
-          new Padding(
-            padding: new EdgeInsets.only(top: 20.0),
-            child: new Text('JUMPING JACKS', style: Theme.of(context).textTheme.title)
-          ),
-          new Padding(
-            padding: new EdgeInsets.only(top: 20.0, bottom: 20.0),
-            child: new Row(
-              mainAxisAlignment: MainAxisAlignment.center,
-              children: <Widget>[
-                _createInfoPanelCell(Icons.accessibility, '$_count', 'COUNT'),
-                _createInfoPanelCell(Icons.timer, _formatSeconds(_time), 'TIME'),
-                _createInfoPanelCell(Icons.flash_on, '$kcal', 'KCAL')
-              ]
-            )
-          ),
-          new Padding(
-            padding: new EdgeInsets.only(bottom: 16.0),
-            child: new SizedBox(
-              width: 300.0,
-              height: 72.0,
-              child: new RaisedButton (
-                onPressed: onButtonPressed,
-                color: buttonColor,
-                child: new Text(
-                  buttonText,
-                  style: new TextStyle(color: Colors.white, fontSize: 20.0)
-                )
-              )
-            )
-          )
-        ]
-      )
-    );
-  }
-
-  Widget _createInfoPanelCell(IconData icon, String value, String description) {
-    Color color;
-    if (workoutAnimation.workingOut)
-      color = Colors.black87;
-    else
-      color = Theme.of(context).disabledColor;
-
-    return new Container(
-      width: 100.0,
-      child: new Center(
-        child: new Column(
-          children: <Widget>[
-            new Icon(icon: icon, size: 48.0, color: color),
-            new Text(value, style: new TextStyle(fontSize: 24.0, color: color)),
-            new Text(description, style: new TextStyle(color: color))
-          ]
-        )
-      )
-    );
-  }
-
-  String _formatSeconds(int seconds) {
-    int minutes = seconds ~/ 60;
-    String secondsStr = "${seconds % 60}".padLeft(2, "0");
-    return "$minutes:$secondsStr";
-  }
-
-  void startWorkout() {
-    setState(() {
-      _count = 0;
-      _time = 0;
-      workoutAnimation.start();
-    });
-  }
-
-  void endWorkout() {
-    setState(() {
-      workoutAnimation.stop();
-
-      if (_count >= 3) {
-        showDialog(
-          context: context,
-          child: new Stack(children: <Widget>[
-            new _Fireworks(),
-            new Dialog(
-              title: new Text('Awesome workout'),
-              content: new Text('You have completed $_count jumping jacks. Good going!'),
-              actions: <Widget>[
-                new FlatButton(
-                  child: new Text('SWEET'),
-                  onPressed: () { Navigator.pop(context); }
-                )
-              ]
-            )
-          ])
-        );
-      }
-    });
-  }
-}
-
-typedef void _SecondPassedCallback(int seconds);
-
-class _WorkoutAnimationNode extends NodeWithSize {
-  _WorkoutAnimationNode({
-    this.onPerformedJumpingJack,
-    this.onSecondPassed
-  }) : super(const Size(1024.0, 1024.0)) {
-    reset();
-
-    _progress = new _ProgressCircle(const Size(800.0, 800.0));
-    _progress.pivot = const Point(0.5, 0.5);
-    _progress.position = const Point(512.0, 512.0);
-    addChild(_progress);
-
-    _jumpingJack = new _JumpingJack((){
-      onPerformedJumpingJack();
-    });
-    _jumpingJack.scale = 0.5;
-    _jumpingJack.position = const Point(512.0, 550.0);
-    addChild(_jumpingJack);
-  }
-
-  final VoidCallback onPerformedJumpingJack;
-  final _SecondPassedCallback onSecondPassed;
-
-  int seconds;
-
-  bool workingOut;
-
-  static const int _kTargetMillis = 1000 * 30;
-  int _startTimeMillis;
-  _ProgressCircle _progress;
-  _JumpingJack _jumpingJack;
-
-  void reset() {
-    seconds = 0;
-    workingOut = false;
-  }
-
-  void start() {
-    reset();
-    _startTimeMillis = new DateTime.now().millisecondsSinceEpoch;
-    workingOut = true;
-    _jumpingJack.animateJumping();
-  }
-
-  void stop() {
-    workingOut = false;
-    _jumpingJack.neutralPose();
-  }
-
-  @override
-  void update(double dt) {
-    if (workingOut) {
-      int millis = new DateTime.now().millisecondsSinceEpoch - _startTimeMillis;
-      int newSeconds = (millis) ~/ 1000;
-      if (newSeconds != seconds) {
-        seconds = newSeconds;
-        onSecondPassed(seconds);
-      }
-
-      _progress.value = millis / _kTargetMillis;
-    } else {
-      _progress.value = 0.0;
-    }
-  }
-}
-
-class _ProgressCircle extends NodeWithSize {
-  _ProgressCircle(Size size, [this.value = 0.0]) : super(size);
-
-  static const double _kTwoPI = math.PI * 2.0;
-  static const double _kEpsilon = .0000001;
-  static const double _kSweep = _kTwoPI - _kEpsilon;
-
-  double value;
-
-  @override
-  void paint(Canvas canvas) {
-    applyTransformForPivot(canvas);
-
-    Paint circlePaint = new Paint()
-      ..color = Colors.white30
-      ..strokeWidth = 24.0
-      ..style = PaintingStyle.stroke;
-
-    canvas.drawCircle(
-      new Point(size.width / 2.0, size.height / 2.0),
-      size.width / 2.0,
-      circlePaint
-    );
-
-    Paint pathPaint = new Paint()
-      ..color = Colors.purple[500]
-      ..strokeWidth = 25.0
-      ..style = PaintingStyle.stroke;
-
-    double angle = value.clamp(0.0, 1.0) * _kSweep;
-    Path path = new Path()
-      ..arcTo(Point.origin & size, -math.PI / 2.0, angle, false);
-    canvas.drawPath(path, pathPaint);
-  }
-}
-
-class _JumpingJack extends Node {
-  _JumpingJack(VoidCallback onPerformedJumpingJack) {
-    left = new _JumpingJackSide(false, onPerformedJumpingJack);
-    right = new _JumpingJackSide(true, null);
-    addChild(left);
-    addChild(right);
-  }
-
-  void animateJumping() {
-    left.animateJumping();
-    right.animateJumping();
-  }
-
-  void neutralPose() {
-    left.neutralPosition(true);
-    right.neutralPosition(true);
-  }
-
-  _JumpingJackSide left;
-  _JumpingJackSide right;
-}
-
-class _JumpingJackSide extends Node {
-  _JumpingJackSide(bool right, this.onPerformedJumpingJack) {
-    // Torso and head
-    torso = _createPart('torso.png', const Point(512.0, 512.0));
-    addChild(torso);
-
-    head = _createPart('head.png', const Point(512.0, 160.0));
-    torso.addChild(head);
-
-    if (right) {
-      torso.opacity = 0.0;
-      head.opacity = 0.0;
-      torso.scaleX = -1.0;
-    }
-
-    // Left side movable parts
-    upperArm = _createPart('upper-arm.png', const Point(445.0, 220.0));
-    torso.addChild(upperArm);
-    lowerArm = _createPart('lower-arm.png', const Point(306.0, 200.0));
-    upperArm.addChild(lowerArm);
-    hand = _createPart('hand.png', const Point(215.0, 127.0));
-    lowerArm.addChild(hand);
-    upperLeg = _createPart('upper-leg.png', const Point(467.0, 492.0));
-    torso.addChild(upperLeg);
-    lowerLeg = _createPart('lower-leg.png', const Point(404.0, 660.0));
-    upperLeg.addChild(lowerLeg);
-    foot = _createPart('foot.png', const Point(380.0, 835.0));
-    lowerLeg.addChild(foot);
-
-    torso.setPivotAndPosition(Point.origin);
-
-    neutralPosition(false);
-  }
-
-  _JumpingJackPart torso;
-  _JumpingJackPart head;
-  _JumpingJackPart upperArm;
-  _JumpingJackPart lowerArm;
-  _JumpingJackPart hand;
-  _JumpingJackPart lowerLeg;
-  _JumpingJackPart upperLeg;
-  _JumpingJackPart foot;
-
-  final VoidCallback onPerformedJumpingJack;
-
-  _JumpingJackPart _createPart(String textureName, Point pivotPosition) {
-    return new _JumpingJackPart(_sprites[textureName], pivotPosition);
-  }
-
-  void animateJumping() {
-    actions.stopAll();
-    actions.run(new ActionSequence(<Action>[
-      _createPoseAction(null, 0, 0.5),
-      new ActionCallFunction(_animateJumpingLoop)
-    ]));
-  }
-
-  void _animateJumpingLoop() {
-    actions.run(new ActionRepeatForever(
-      new ActionSequence(<Action>[
-        _createPoseAction(0, 1, 0.30),
-        _createPoseAction(1, 2, 0.30),
-        _createPoseAction(2, 1, 0.30),
-        _createPoseAction(1, 0, 0.30),
-        new ActionCallFunction(() {
-          if (onPerformedJumpingJack != null)
-            onPerformedJumpingJack();
-        })
-      ])
-    ));
-  }
-
-  void neutralPosition(bool animate) {
-    actions.stopAll();
-    if (animate) {
-      actions.run(_createPoseAction(null, 1, 0.5));
-    } else {
-      List<double> d = _dataForPose(1);
-      upperArm.rotation = d[0];
-      lowerArm.rotation = d[1];
-      hand.rotation = d[2];
-      upperLeg.rotation = d[3];
-      lowerLeg.rotation = d[4];
-      foot.rotation = d[5];
-      torso.position = new Point(0.0, d[6]);
-    }
-  }
-
-  ActionInterval _createPoseAction(int startPose, int endPose, double duration) {
-    List<double> d0 = _dataForPose(startPose);
-    List<double> d1 = _dataForPose(endPose);
-
-    List<ActionTween> tweens = <ActionTween>[
-      _tweenRotation(upperArm, d0[0], d1[0], duration),
-      _tweenRotation(lowerArm, d0[1], d1[1], duration),
-      _tweenRotation(hand, d0[2], d1[2], duration),
-      _tweenRotation(upperLeg, d0[3], d1[3], duration),
-      _tweenRotation(lowerLeg, d0[4], d1[4], duration),
-      _tweenRotation(foot, d0[5], d1[5], duration),
-      new ActionTween(
-        (Point a) => torso.position = a,
-        new Point(0.0, d0[6]),
-        new Point(0.0, d1[6]),
-        duration
-      )
-    ];
-
-    return new ActionGroup(tweens);
-  }
-
-  ActionTween _tweenRotation(_JumpingJackPart part, double r0, double r1, double duration) {
-    return new ActionTween(
-      (double a) => part.rotation = a,
-      r0,
-      r1,
-      duration
-    );
-  }
-
-  List<double> _dataForPose(int pose) {
-    if (pose == null)
-      return _dataForCurrentPose();
-
-    if (pose == 0) {
-      return <double>[
-        -80.0, // Upper arm rotation
-        -30.0, // Lower arm rotation
-        -10.0, // Hand rotation
-        -15.0, // Upper leg rotation
-        5.0,   // Lower leg rotation
-        15.0,  // Foot rotation
-        0.0    // Torso y offset
-      ];
-    } else if (pose == 1) {
-      return <double>[
-        0.0,
-        0.0,
-        0.0,
-        0.0,
-        0.0,
-        0.0,
-        -70.0
-      ];
-    } else {
-      return <double>[
-        40.0,
-        30.0,
-        10.0,
-        20.0,
-        -20.0,
-        15.0,
-        40.0
-      ];
-    }
-  }
-
-  List<double> _dataForCurrentPose() {
-    return <double>[
-      upperArm.rotation,
-      lowerArm.rotation,
-      hand.rotation,
-      upperLeg.rotation,
-      lowerLeg.rotation,
-      foot.rotation,
-      torso.position.y
-    ];
-  }
-}
-
-class _JumpingJackPart extends Sprite {
-  _JumpingJackPart(Texture texture, this.pivotPosition) : super(texture);
-  final Point pivotPosition;
-
-  void setPivotAndPosition(Point newPosition) {
-    pivot = new Point(pivotPosition.x / 1024.0, pivotPosition.y / 1024.0);
-    position = newPosition;
-
-    for (Node child in children) {
-      _JumpingJackPart subPart = child;
-      subPart.setPivotAndPosition(
-        new Point(
-          subPart.pivotPosition.x - pivotPosition.x,
-          subPart.pivotPosition.y - pivotPosition.y
-        )
-      );
-    }
-  }
-}
-
-class _Fireworks extends StatefulWidget {
-  _Fireworks({ Key key }) : super(key: key);
-
-  @override
-  _FireworksState createState() => new _FireworksState();
-}
-
-class _FireworksState extends State<_Fireworks> {
-  @override
-  void initState() {
-    super.initState();
-    fireworks = new _FireworksNode();
-  }
-
-  _FireworksNode fireworks;
-
-  @override
-  Widget build(BuildContext context) {
-    return new SpriteWidget(fireworks);
-  }
-}
-
-class _FireworksNode extends NodeWithSize {
-  _FireworksNode() : super(const Size(1024.0, 1024.0));
-  double _countDown = 0.0;
-
-  @override
-  void update(double dt) {
-    if (_countDown <= 0.0) {
-      _addExplosion();
-      _countDown = randomDouble();
-    }
-
-    _countDown -= dt;
-  }
-
-  Color _randomExplosionColor() {
-    double rand = randomDouble();
-    if (rand < 0.25)
-      return Colors.pink[200];
-    else if (rand < 0.5)
-      return Colors.lightBlue[200];
-    else if (rand < 0.75)
-      return Colors.purple[200];
-    else
-      return Colors.cyan[200];
-  }
-
-  void _addExplosion() {
-    Color startColor = _randomExplosionColor();
-    Color endColor = startColor.withAlpha(0);
-
-    ParticleSystem system = new ParticleSystem(
-      _sprites['particle-0.png'],
-      numParticlesToEmit: 100,
-      emissionRate: 1000.0,
-      rotateToMovement: true,
-      startRotation: 90.0,
-      endRotation: 90.0,
-      speed: 100.0,
-      speedVar: 50.0,
-      startSize: 1.0,
-      startSizeVar: 0.5,
-      gravity: const Offset(0.0, 30.0),
-      colorSequence: new ColorSequence.fromStartAndEndColor(startColor, endColor)
-    );
-    system.position = new Point(randomDouble() * 1024.0, randomDouble() * 1024.0);
-    addChild(system);
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/flexible_space_demo.dart

@@ -1,204 +0,0 @@
-// 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:flutter/material.dart';
-import 'package:flutter/widgets.dart';
-
-class _ContactCategory extends StatelessWidget {
-  _ContactCategory({ Key key, this.icon, this.children }) : super(key: key);
-
-  final IconData icon;
-  final List<Widget> children;
-
-  @override
-  Widget build(BuildContext context) {
-    return new Container(
-      padding: const EdgeInsets.symmetric(vertical: 16.0),
-      decoration: new BoxDecoration(
-        border: new Border(bottom: new BorderSide(color: Theme.of(context).dividerColor))
-      ),
-      child: new DefaultTextStyle(
-        style: Theme.of(context).textTheme.subhead,
-        child: new Row(
-          children: <Widget>[
-            new SizedBox(
-              width: 72.0,
-              child: new Icon(icon: icon, color: Theme.of(context).primaryColor)
-            ),
-            new Flexible(child: new Column(children: children))
-          ]
-        )
-      )
-    );
-  }
-}
-
-class _ContactItem extends StatelessWidget {
-  _ContactItem({ Key key, this.icon, this.lines }) : super(key: key) {
-    assert(lines.length > 1);
-  }
-
-  final IconData icon;
-  final List<String> lines;
-
-  @override
-  Widget build(BuildContext context) {
-    List<Widget> columnChildren = lines.sublist(0, lines.length - 1).map((String line) => new Text(line)).toList();
-    columnChildren.add(new Text(lines.last, style: Theme.of(context).textTheme.caption));
-
-    List<Widget> rowChildren = <Widget>[
-      new Column(
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: columnChildren
-      )
-    ];
-    if (icon != null) {
-      rowChildren.add(new SizedBox(
-        width: 72.0,
-        child: new Icon(icon: icon, color: Theme.of(context).disabledColor)
-      ));
-    }
-    return new Padding(
-      padding: const EdgeInsets.symmetric(vertical: 16.0),
-      child: new Row(
-        mainAxisAlignment: MainAxisAlignment.spaceBetween,
-        children: rowChildren
-      )
-    );
-  }
-}
-
-class FlexibleSpaceDemo extends StatefulWidget {
-  static const String routeName = '/flexible-space';
-
-  @override
-  FlexibleSpaceDemoState createState() => new FlexibleSpaceDemoState();
-}
-
-class FlexibleSpaceDemoState extends State<FlexibleSpaceDemo> {
-  final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
-  final double _appBarHeight = 256.0;
-  AppBarBehavior _appBarBehavior = AppBarBehavior.scroll;
-
-  @override
-  Widget build(BuildContext context) {
-    final double statusBarHeight = MediaQuery.of(context).padding.top;
-    return new Theme(
-      data: new ThemeData(
-        brightness: ThemeBrightness.light,
-        primarySwatch: Colors.indigo
-      ),
-      child: new Scaffold(
-        key: _scaffoldKey,
-        appBarBehavior: _appBarBehavior,
-        appBar: new AppBar(
-          expandedHeight: _appBarHeight,
-          actions: <Widget>[
-            new IconButton(
-              icon: Icons.create,
-              tooltip: 'Search',
-              onPressed: () {
-                _scaffoldKey.currentState.showSnackBar(new SnackBar(
-                  content: new Text('Not supported.')
-                ));
-              }
-            ),
-            new PopupMenuButton<AppBarBehavior>(
-              onSelected: (AppBarBehavior value) {
-                setState(() {
-                  _appBarBehavior = value;
-                });
-              },
-              itemBuilder: (BuildContext context) => <PopupMenuItem<AppBarBehavior>>[
-                new PopupMenuItem<AppBarBehavior>(
-                  value: AppBarBehavior.scroll,
-                  child: new Text('Toolbar scrolls away')
-                ),
-                new PopupMenuItem<AppBarBehavior>(
-                  value: AppBarBehavior.under,
-                  child: new Text('Toolbar stays put')
-                )
-              ]
-            )
-          ],
-          flexibleSpace: new FlexibleSpaceBar(
-            title : new Text('Ali Connors'),
-            background: new AssetImage(
-              name: 'packages/flutter_gallery_assets/ali_connors.png',
-              fit: ImageFit.cover,
-              height: _appBarHeight
-            )
-          )
-        ),
-        body: new Block(
-          padding: new EdgeInsets.only(top: _appBarHeight + statusBarHeight),
-          children: <Widget>[
-            new _ContactCategory(
-              icon: Icons.call,
-              children: <Widget>[
-                new _ContactItem(
-                  icon: Icons.message,
-                  lines: <String>[
-                    '(650) 555-1234',
-                    'Mobile'
-                  ]
-                ),
-                new _ContactItem(
-                  icon: Icons.message,
-                  lines: <String>[
-                    '(323) 555-6789',
-                    'Work'
-                  ]
-                )
-              ]
-            ),
-            new _ContactCategory(
-              icon: Icons.email,
-              children: <Widget>[
-                new _ContactItem(
-                  lines: <String>[
-                    'ali_connors@example.com',
-                    'Personal'
-                  ]
-                ),
-                new _ContactItem(
-                  lines: <String>[
-                    'aliconnors@example.com',
-                    'Work'
-                  ]
-                )
-              ]
-            ),
-            new _ContactCategory(
-              icon: Icons.location_on,
-              children: <Widget>[
-                new _ContactItem(
-                  lines: <String>[
-                    '2000 Main Street',
-                    'San Francisco, CA',
-                    'Home'
-                  ]
-                ),
-                new _ContactItem(
-                  lines: <String>[
-                    '1600 Amphitheater Parkway',
-                    'Mountain View, CA',
-                    'Work'
-                  ]
-                ),
-                new _ContactItem(
-                  lines: <String>[
-                    '126 Severyns Ave',
-                    'Mountain View, CA',
-                    'Jet Travel'
-                  ]
-                )
-              ]
-            )
-          ]
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/full_screen_dialog_demo.dart

@@ -1,246 +0,0 @@
-// Copyright 2016 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:intl/intl.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
-
-// This demo is based on
-// https://www.google.com/design/spec/components/dialogs.html#dialogs-full-screen-dialogs
-
-enum DismissDialogAction {
-  cancel,
-  discard,
-  save,
-}
-
-class DateTimeItem extends StatelessWidget {
-  DateTimeItem({ Key key, DateTime dateTime, this.onChanged })
-    : date = new DateTime(dateTime.year, dateTime.month, dateTime.day),
-      time = new TimeOfDay(hour: dateTime.hour, minute: dateTime.minute),
-      super(key: key) {
-    assert(onChanged != null);
-  }
-
-  final DateTime date;
-  final TimeOfDay time;
-  final ValueChanged<DateTime> onChanged;
-
-  @override
-  Widget build(BuildContext context) {
-    final ThemeData theme = Theme.of(context);
-
-    return new DefaultTextStyle(
-      style: theme.textTheme.subhead,
-      child: new Row(
-        children: <Widget>[
-          new Flexible(
-            child: new Container(
-              padding: const EdgeInsets.symmetric(vertical: 8.0),
-              decoration: new BoxDecoration(
-                border: new Border(bottom: new BorderSide(color: theme.dividerColor))
-              ),
-              child: new InkWell(
-                onTap: () {
-                  showDatePicker(
-                    context: context,
-                    initialDate: date,
-                    firstDate: date.subtract(const Duration(days: 30)),
-                    lastDate: date.add(const Duration(days: 30))
-                  )
-                  .then((DateTime value) {
-                    onChanged(new DateTime(value.year, value.month, value.day, time.hour, time.minute));
-                  });
-                },
-                child: new Row(
-                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                  children: <Widget>[
-                    new Text(new DateFormat('EEE, MMM d yyyy').format(date)),
-                    new Icon(icon: Icons.arrow_drop_down, color: Colors.black54),
-                  ]
-                )
-              )
-            )
-          ),
-          new Container(
-            margin: const EdgeInsets.only(left: 8.0),
-            padding: const EdgeInsets.symmetric(vertical: 8.0),
-            decoration: new BoxDecoration(
-              border: new Border(bottom: new BorderSide(color: theme.dividerColor))
-            ),
-            child: new InkWell(
-              onTap: () {
-                showTimePicker(
-                  context: context,
-                  initialTime: time
-                )
-                .then((TimeOfDay value) {
-                  onChanged(new DateTime(date.year, date.month, date.day, value.hour, value.minute));
-                });
-              },
-              child: new Row(
-                children: <Widget>[
-                  new Text('$time'),
-                  new Icon(icon: Icons.arrow_drop_down, color: Colors.black54),
-                ]
-              )
-            )
-          )
-        ]
-      )
-    );
-  }
-}
-
-class FullScreenDialogDemo extends StatefulWidget {
-  @override
-  FullScreenDialogDemoState createState() => new FullScreenDialogDemoState();
-}
-
-class FullScreenDialogDemoState extends State<FullScreenDialogDemo> {
-  DateTime _fromDateTime = new DateTime.now();
-  DateTime _toDateTime = new DateTime.now();
-  bool _allDayValue = false;
-  bool _saveNeeded = false;
-
-  void handleDismissButton(BuildContext context) {
-    if (!_saveNeeded) {
-      Navigator.pop(context, null);
-      return;
-    }
-
-    final ThemeData theme = Theme.of(context);
-    final TextStyle dialogTextStyle = theme.textTheme.subhead.copyWith(color: theme.textTheme.caption.color);
-
-    showDialog(
-      context: context,
-      child: new Dialog(
-        content: new Text(
-          'Discard new event?',
-          style: dialogTextStyle
-        ),
-        actions: <Widget>[
-          new FlatButton(
-            child: new Text('CANCEL'),
-            onPressed: () { Navigator.pop(context, DismissDialogAction.cancel); }
-          ),
-          new FlatButton(
-            child: new Text('DISCARD'),
-            onPressed: () {
-              Navigator.openTransaction(context, (NavigatorTransaction transaction) {
-                transaction.pop(DismissDialogAction.discard); // pop the cancel/discard dialog
-                transaction.pop(null); // pop this route
-              });
-            }
-          )
-        ]
-      )
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final ThemeData theme = Theme.of(context);
-
-    return new Scaffold(
-      appBar: new AppBar(
-        leading: new IconButton(
-          icon: Icons.clear,
-          onPressed: () { handleDismissButton(context); }
-        ),
-        title: new Text('New event'),
-        actions: <Widget> [
-          new FlatButton(
-            child: new Text('SAVE', style: theme.textTheme.body1.copyWith(color: Colors.white)),
-            onPressed: () {
-              Navigator.pop(context, DismissDialogAction.save);
-            }
-          )
-        ]
-      ),
-      body: new Block(
-        padding: const EdgeInsets.all(16.0),
-        children: <Widget>[
-          new Container(
-            padding: const EdgeInsets.symmetric(vertical: 8.0),
-            decoration: new BoxDecoration(
-              border: new Border(bottom: new BorderSide(color: theme.dividerColor))
-            ),
-            child: new Align(
-              alignment: FractionalOffset.bottomLeft,
-              child: new Text('Event name', style: theme.textTheme.display2)
-            )
-          ),
-          new Container(
-            padding: const EdgeInsets.symmetric(vertical: 8.0),
-            decoration: new BoxDecoration(
-              border: new Border(bottom: new BorderSide(color: theme.dividerColor))
-            ),
-            child: new Align(
-              alignment: FractionalOffset.bottomLeft,
-              child: new Text('Location', style: theme.textTheme.title.copyWith(color: Colors.black54))
-            )
-          ),
-          new Column(
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: <Widget>[
-              new Text('From', style: theme.textTheme.caption),
-              new DateTimeItem(
-                dateTime: _fromDateTime,
-                onChanged: (DateTime value) {
-                  setState(() {
-                    _fromDateTime = value;
-                    _saveNeeded = true;
-                  });
-                }
-              )
-            ]
-          ),
-          new Column(
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: <Widget>[
-              new Text('To', style: theme.textTheme.caption),
-              new DateTimeItem(
-                dateTime: _toDateTime,
-                onChanged: (DateTime value) {
-                  setState(() {
-                    _toDateTime = value;
-                    _saveNeeded = true;
-                  });
-                }
-              )
-            ]
-          ),
-          new Container(
-            decoration: new BoxDecoration(
-              border: new Border(bottom: new BorderSide(color: theme.dividerColor))
-            ),
-            child: new Row(
-              children: <Widget> [
-                new Checkbox(
-                  value: _allDayValue,
-                  onChanged: (bool value) {
-                    setState(() {
-                      _allDayValue = value;
-                      _saveNeeded = true;
-                    });
-                  }
-                ),
-                new Text('All-day')
-              ]
-            )
-          )
-        ]
-        .map((Widget child) {
-          return new Container(
-            padding: const EdgeInsets.symmetric(vertical: 8.0),
-            height: 96.0,
-            child: child
-          );
-        })
-        .toList()
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/grid_list_demo.dart

@@ -1,283 +0,0 @@
-// Copyright 2016 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:collection';
-
-import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
-
-import '../gallery/demo.dart';
-
-const String _kExampleCode = 'gridlists';
-
-enum GridDemoTileStyle {
-  imageOnly,
-  oneLine,
-  twoLine
-}
-
-class Photo {
-  Photo({ this.assetName, this.title, this.caption, this.isFavorite: false });
-
-  final String assetName;
-  final String title;
-  final String caption;
-
-  bool isFavorite;
-
-  bool get isValid => assetName != null && title != null && caption != null && isFavorite != null;
-}
-
-const String photoHeroTag = 'Photo';
-
-typedef void PhotoFavoriteCallback(Photo photo);
-
-class GridDemoPhotoItem extends StatelessWidget {
-  GridDemoPhotoItem({
-    Key key,
-    this.photo,
-    this.tileStyle,
-    this.onPressedFavorite
-  }) : super(key: key) {
-    assert(photo != null && photo.isValid);
-    assert(tileStyle != null);
-    assert(onPressedFavorite != null);
-  }
-
-  final Photo photo;
-  final GridDemoTileStyle tileStyle;
-  final PhotoFavoriteCallback onPressedFavorite;
-
-  void showPhoto(BuildContext context) {
-    Key photoKey = new Key(photo.assetName);
-    Set<Key> mostValuableKeys = new HashSet<Key>();
-    mostValuableKeys.add(photoKey);
-
-    Navigator.push(context, new MaterialPageRoute<Null>(
-      settings: new RouteSettings(
-        mostValuableKeys: mostValuableKeys
-      ),
-      builder: (BuildContext context) {
-        return new Scaffold(
-          appBar: new AppBar(
-            title: new Text(photo.title)
-          ),
-          body: new Material(
-            child: new Hero(
-              tag: photoHeroTag,
-              child: new AssetImage(
-                name: photo.assetName,
-                fit: ImageFit.cover
-              )
-            )
-          )
-        );
-      }
-    ));
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final Widget image = new GestureDetector(
-      onTap: () { showPhoto(context); },
-      child: new Hero(
-        key: new Key(photo.assetName),
-        tag: photoHeroTag,
-        child: new AssetImage(
-          name: photo.assetName,
-          fit: ImageFit.cover
-        )
-      )
-    );
-
-    IconData icon = photo.isFavorite ? Icons.star : Icons.star_border;
-
-    switch(tileStyle) {
-      case GridDemoTileStyle.imageOnly:
-        return image;
-
-      case GridDemoTileStyle.oneLine:
-        return new GridTile(
-          header: new GridTileBar(
-            backgroundColor: Colors.black45,
-            leading: new IconButton(
-              icon: icon,
-              color: Colors.white,
-              onPressed: () { onPressedFavorite(photo); }
-            ),
-            title: new Text(photo.title)
-          ),
-          child: image
-        );
-
-      case GridDemoTileStyle.twoLine:
-        return new GridTile(
-          footer: new GridTileBar(
-            backgroundColor: Colors.black45,
-            title: new Text(photo.title),
-            subtitle: new Text(photo.caption),
-            trailing: new IconButton(
-              icon: icon,
-              color: Colors.white,
-              onPressed: () { onPressedFavorite(photo); }
-            )
-          ),
-          child: image
-        );
-    }
-  }
-}
-
-class GridListDemo extends StatefulWidget {
-  GridListDemo({ Key key }) : super(key: key);
-
-  static const String routeName = '/grid-list';
-
-  @override
-  GridListDemoState createState() => new GridListDemoState();
-}
-
-class GridListDemoState extends State<GridListDemo> {
-  GridDemoTileStyle tileStyle = GridDemoTileStyle.twoLine;
-
-  List<Photo> photos = <Photo>[
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_0.jpg',
-      title: 'Philippines',
-      caption: 'Batad rice terraces'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_1.jpg',
-      title: 'Italy',
-      caption: 'Ceresole Reale'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_2.jpg',
-      title: 'Somewhere',
-      caption: 'Beautiful mountains'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_3.jpg',
-      title: 'A place',
-      caption: 'Beautiful hills'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_4.jpg',
-      title: 'New Zealand',
-      caption: 'View from the van'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_5.jpg',
-      title: 'Autumn',
-      caption: 'The golden season'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_6.jpg',
-      title: 'Germany',
-      caption: 'Englischer Garten'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_7.jpg',
-      title: 'A country',
-      caption: 'Grass fields'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_8.jpg',
-      title: 'Mountain country',
-      caption: 'River forest'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_9.jpg',
-      title: 'Alpine place',
-      caption: 'Green hills'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_10.jpg',
-      title: 'Desert land',
-      caption: 'Blue skies'
-    ),
-    new Photo(
-      assetName: 'packages/flutter_gallery_assets/landscape_11.jpg',
-      title: 'Narnia',
-      caption: 'Rocks and rivers'
-    ),
-  ];
-
-  void showTileStyleMenu(BuildContext context) {
-    final List<PopupMenuItem<GridDemoTileStyle>> items = <PopupMenuItem<GridDemoTileStyle>>[
-      new PopupMenuItem<GridDemoTileStyle>(
-        value: GridDemoTileStyle.imageOnly,
-        child: new Text('Image only')
-      ),
-      new PopupMenuItem<GridDemoTileStyle>(
-        value: GridDemoTileStyle.oneLine,
-        child: new Text('One line')
-      ),
-      new PopupMenuItem<GridDemoTileStyle>(
-        value: GridDemoTileStyle.twoLine,
-        child: new Text('Two line')
-      )
-    ];
-
-    final EdgeInsets padding = MediaQuery.of(context).padding;
-    final RelativeRect position = new RelativeRect.fromLTRB(
-      0.0, padding.top + 16.0, padding.right + 16.0, 0.0
-    );
-
-    showMenu(context: context, position: position, items: items).then((GridDemoTileStyle value) {
-      setState(() {
-        tileStyle = value;
-      });
-    });
-  }
-
-  // When the ScrollableGrid first appears we want the last row to only be
-  // partially visible, to help the user recognize that the grid is scrollable.
-  // The GridListDemoGridDelegate's tileHeightFactor is used for this.
-  @override
-  Widget build(BuildContext context) {
-    final Orientation orientation = MediaQuery.of(context).orientation;
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('Grid list'),
-        actions: <Widget>[
-          new IconButton(
-            icon: Icons.more_vert,
-            onPressed: () { showTileStyleMenu(context); },
-            tooltip: 'Show menu'
-          )
-        ]
-      ),
-      body: new Column(
-        children: <Widget>[
-          new Flexible(
-            child: new ScrollableGrid(
-              delegate: new FixedColumnCountGridDelegate(
-                columnCount: (orientation == Orientation.portrait) ? 2 : 3,
-                rowSpacing: 4.0,
-                columnSpacing: 4.0,
-                padding: const EdgeInsets.all(4.0),
-                tileAspectRatio: (orientation == Orientation.portrait) ? 1.0 : 1.3
-              ),
-              children: photos.map((Photo photo) {
-                return new GridDemoPhotoItem(
-                  photo: photo,
-                  tileStyle: tileStyle,
-                  onPressedFavorite: (Photo photo) {
-                    setState(() {
-                      photo.isFavorite = !photo.isFavorite;
-                    });
-                  }
-                );
-              })
-            )
-          ),
-          new DemoBottomBar(
-            exampleCodeTag: _kExampleCode
-          )
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/icons_demo.dart

@@ -1,162 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-
-class IconsDemo extends StatefulWidget {
-  static const String routeName = '/icons';
-
-  @override
-  IconsDemoState createState() => new IconsDemoState();
-}
-
-class IconsDemoState extends State<IconsDemo> {
-  static final List<Map<int, Color>> iconColorSwatches = <Map<int, Color>>[
-    Colors.red,
-    Colors.pink,
-    Colors.purple,
-    Colors.deepPurple,
-    Colors.indigo,
-    Colors.blue,
-    Colors.lightBlue,
-    Colors.cyan,
-    Colors.teal,
-    Colors.green,
-    Colors.lightGreen,
-    Colors.lime,
-    Colors.yellow,
-    Colors.amber,
-    Colors.orange,
-    Colors.deepOrange,
-    Colors.brown,
-    Colors.grey,
-    Colors.blueGrey
-  ];
-
-  int iconColorIndex = 2;
-  double iconOpacity = 1.0;
-
-  Color get iconColor => iconColorSwatches[iconColorIndex][400];
-
-  void handleIconButtonPress() {
-    setState(() {
-      iconColorIndex = (iconColorIndex + 1) % iconColorSwatches.length;
-    });
-  }
-
-  Widget buildIconButton(double size, IconData icon, bool enabled) {
-    return new IconButton(
-      size: size,
-      icon: icon,
-      color: iconColor,
-      tooltip: "${enabled ? 'enabled' : 'disabled'} icon button",
-      onPressed: enabled ? handleIconButtonPress : null
-    );
-  }
-
-  Widget buildSizeLabel(int size, TextStyle style) {
-    return new SizedBox(
-      height: size.toDouble() + 16.0, // to match an IconButton's padded height
-      child: new Center(
-        child: new Text('$size', style: style)
-      )
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final ThemeData theme = Theme.of(context);
-    final TextStyle textStyle = theme.textTheme.subhead.copyWith(color: theme.textTheme.caption.color);
-
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('Icons')
-      ),
-      body: new IconTheme(
-        data: new IconThemeData(opacity: iconOpacity),
-        child: new Padding(
-          padding: const EdgeInsets.all(24.0),
-          child: new Column(
-            children: <Widget>[
-              new Row(
-                mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                crossAxisAlignment: CrossAxisAlignment.center,
-                children: <Widget>[
-                  new Flexible(
-                    flex: 0,
-                    child: new Column(
-                      crossAxisAlignment: CrossAxisAlignment.center,
-                      children: <Widget>[
-                        new Text('Size', style: textStyle),
-                        buildSizeLabel(18, textStyle),
-                        buildSizeLabel(24, textStyle),
-                        buildSizeLabel(36, textStyle),
-                        buildSizeLabel(48, textStyle)
-                      ]
-                    )
-                  ),
-                  new Flexible(
-                    child: new Column(
-                      crossAxisAlignment: CrossAxisAlignment.center,
-                      children: <Widget>[
-                        new Text('Enabled', style: textStyle),
-                        buildIconButton(18.0, Icons.face, true),
-                        buildIconButton(24.0, Icons.alarm, true),
-                        buildIconButton(36.0, Icons.home, true),
-                        buildIconButton(48.0, Icons.android, true)
-                      ]
-                    )
-                  ),
-                  new Flexible(
-                    child: new Column(
-                      crossAxisAlignment: CrossAxisAlignment.center,
-                      children: <Widget>[
-                        new Text('Disabled', style: textStyle),
-                        buildIconButton(18.0, Icons.face, false),
-                        buildIconButton(24.0, Icons.alarm, false),
-                        buildIconButton(36.0, Icons.home, false),
-                        buildIconButton(48.0, Icons.android, false)
-                      ]
-                    )
-                  )
-                ]
-              ),
-              new Flexible(
-                child: new Center(
-                  child: new IconTheme(
-                    data: new IconThemeData(opacity: 1.0),
-                    child: new Row(
-                      mainAxisAlignment: MainAxisAlignment.center,
-                      children: <Widget>[
-                        new Icon(
-                          icon: Icons.brightness_7,
-                          color: iconColor.withAlpha(0x33) // 0.2 * 255 = 0x33
-                        ),
-                        new Slider(
-                          value: iconOpacity,
-                          min: 0.2,
-                          max: 1.0,
-                          activeColor: iconColor,
-                          onChanged: (double newValue) {
-                            setState(() {
-                              iconOpacity = newValue;
-                            });
-                          }
-                        ),
-                        new Icon(
-                          icon: Icons.brightness_7,
-                          color: iconColor.withAlpha(0xFF)
-                        ),
-                      ]
-                    )
-                  )
-                )
-              )
-            ]
-          )
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/leave_behind_demo.dart

@@ -1,170 +0,0 @@
-// Copyright 2016 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:collection/collection.dart' show lowerBound;
-
-import 'package:flutter/material.dart';
-
-enum LeaveBehindDemoAction {
-  reset,
-  horizontalSwipe,
-  leftSwipe,
-  rightSwipe
-}
-
-class LeaveBehindItem implements Comparable<LeaveBehindItem> {
-  LeaveBehindItem({ this.index, this.name, this.subject, this.body });
-
-  LeaveBehindItem.from(LeaveBehindItem item)
-    : index = item.index, name = item.name, subject = item.subject, body = item.body;
-
-  final int index;
-  final String name;
-  final String subject;
-  final String body;
-
-  @override
-  int compareTo(LeaveBehindItem other) => index.compareTo(other.index);
-}
-
-class LeaveBehindDemo extends StatefulWidget {
-  LeaveBehindDemo({ Key key }) : super(key: key);
-
-  static const String routeName = '/leave-behind';
-
-  @override
-  LeaveBehindDemoState createState() => new LeaveBehindDemoState();
-}
-
-class LeaveBehindDemoState extends State<LeaveBehindDemo> {
-  final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
-  DismissDirection _dismissDirection = DismissDirection.horizontal;
-  List<LeaveBehindItem> leaveBehindItems;
-
-  void initListItems() {
-    leaveBehindItems = new List<LeaveBehindItem>.generate(16, (int index) {
-      return new LeaveBehindItem(
-        index: index,
-        name: 'Item $index Sender',
-        subject: 'Subject: $index',
-        body: "[$index] first line of the message's body..."
-      );
-    });
-  }
-
-  @override
-  void initState() {
-    super.initState();
-    initListItems();
-  }
-
-  void handleDemoAction(LeaveBehindDemoAction action) {
-    switch(action) {
-      case LeaveBehindDemoAction.reset:
-        initListItems();
-        break;
-      case LeaveBehindDemoAction.horizontalSwipe:
-        _dismissDirection = DismissDirection.horizontal;
-        break;
-      case LeaveBehindDemoAction.leftSwipe:
-        _dismissDirection = DismissDirection.endToStart;
-        break;
-      case LeaveBehindDemoAction.rightSwipe:
-        _dismissDirection = DismissDirection.startToEnd;
-        break;
-    }
-  }
-
-  void handleUndo(LeaveBehindItem item) {
-    int insertionIndex = lowerBound(leaveBehindItems, item);
-    setState(() {
-      leaveBehindItems.insert(insertionIndex, item);
-    });
-  }
-
-  Widget buildItem(LeaveBehindItem item) {
-    final ThemeData theme = Theme.of(context);
-    return new Dismissable(
-      key: new ObjectKey(item),
-      direction: _dismissDirection,
-      onDismissed: (DismissDirection direction) {
-        setState(() {
-          leaveBehindItems.remove(item);
-        });
-        final String action = (direction == DismissDirection.endToStart) ? 'archived' : 'deleted';
-        _scaffoldKey.currentState.showSnackBar(new SnackBar(
-          content: new Text('You $action item ${item.index}'),
-          action: new SnackBarAction(
-            label: 'UNDO',
-            onPressed: () { handleUndo(item); }
-          )
-        ));
-      },
-      background: new Container(
-        decoration: new BoxDecoration(backgroundColor: theme.primaryColor),
-        child: new ListItem(
-          leading: new Icon(icon: Icons.delete, color: Colors.white, size: 36.0)
-        )
-      ),
-      secondaryBackground: new Container(
-        decoration: new BoxDecoration(backgroundColor: theme.primaryColor),
-        child: new ListItem(
-          trailing: new Icon(icon: Icons.archive, color: Colors.white, size: 36.0)
-        )
-      ),
-      child: new Container(
-        decoration: new BoxDecoration(
-          backgroundColor: theme.canvasColor,
-          border: new Border(bottom: new BorderSide(color: theme.dividerColor))
-        ),
-        child: new ListItem(
-          title: new Text(item.name),
-          subtitle: new Text('${item.subject}\n${item.body}'),
-          isThreeLine: true
-        )
-      )
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      key: _scaffoldKey,
-      appBar: new AppBar(
-        title: new Text('Swipe items to dismiss'),
-        actions: <Widget>[
-          new PopupMenuButton<LeaveBehindDemoAction>(
-            onSelected: handleDemoAction,
-            itemBuilder: (BuildContext context) => <PopupMenuEntry<LeaveBehindDemoAction>>[
-              new PopupMenuItem<LeaveBehindDemoAction>(
-                value: LeaveBehindDemoAction.reset,
-                child: new Text('Reset the list')
-              ),
-              new PopupMenuDivider(),
-              new CheckedPopupMenuItem<LeaveBehindDemoAction>(
-                value: LeaveBehindDemoAction.horizontalSwipe,
-                checked: _dismissDirection == DismissDirection.horizontal,
-                child: new Text('Hoizontal swipe')
-              ),
-              new CheckedPopupMenuItem<LeaveBehindDemoAction>(
-                value: LeaveBehindDemoAction.leftSwipe,
-                checked: _dismissDirection == DismissDirection.endToStart,
-                child: new Text('Only swipe left')
-              ),
-              new CheckedPopupMenuItem<LeaveBehindDemoAction>(
-                value: LeaveBehindDemoAction.rightSwipe,
-                checked: _dismissDirection == DismissDirection.startToEnd,
-                child: new Text('Only swipe right')
-              )
-            ]
-          )
-        ]
-      ),
-      body: new Block(
-        padding: new EdgeInsets.all(4.0),
-        children: leaveBehindItems.map(buildItem).toList()
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/list_demo.dart

@@ -1,205 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-
-class ListDemo extends StatefulWidget {
-  ListDemo({ Key key }) : super(key: key);
-
-  static const String routeName = '/list';
-
-  @override
-  ListDemoState createState() => new ListDemoState();
-}
-
-class ListDemoState extends State<ListDemo> {
-  final GlobalKey<ScaffoldState> scaffoldKey = new GlobalKey<ScaffoldState>();
-
-  PersistentBottomSheetController<Null> _bottomSheet;
-  MaterialListType _itemType = MaterialListType.threeLine;
-  bool _dense = false;
-  bool _showAvatars = true;
-  bool _showIcons = false;
-  bool _showDividers = false;
-  bool _reverseSort = false;
-  List<String> items = <String>[
-    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N'
-  ];
-
-  void changeItemType(MaterialListType type) {
-    setState(() {
-      _itemType = type;
-    });
-    _bottomSheet?.setState(() { });
-  }
-
-  void showConfigurationSheet(BuildContext appContext) {
-    _bottomSheet = scaffoldKey.currentState.showBottomSheet((BuildContext bottomSheetContext) {
-      return new Container(
-        decoration: new BoxDecoration(
-          border: new Border(top: new BorderSide(color: Colors.black26))
-        ),
-        child: new Block(
-          children: <Widget>[
-            new ListItem(
-              dense: true,
-              title: new Text('One-line'),
-              trailing: new Radio<MaterialListType>(
-                value: _showAvatars ? MaterialListType.oneLineWithAvatar : MaterialListType.oneLine,
-                groupValue: _itemType,
-                onChanged: changeItemType
-              )
-            ),
-            new ListItem(
-              dense: true,
-              title: new Text('Two-line'),
-              trailing: new Radio<MaterialListType>(
-                value: MaterialListType.twoLine,
-                groupValue: _itemType,
-                onChanged: changeItemType
-              )
-            ),
-            new ListItem(
-              dense: true,
-              title: new Text('Three-line'),
-              trailing: new Radio<MaterialListType>(
-                value: MaterialListType.threeLine,
-                groupValue: _itemType,
-                onChanged: changeItemType
-              )
-            ),
-            new ListItem(
-              dense: true,
-              title: new Text('Show avatar'),
-              trailing: new Checkbox(
-                value: _showAvatars,
-                onChanged: (bool value) {
-                  setState(() {
-                    _showAvatars = value;
-                  });
-                  _bottomSheet?.setState(() { });
-                }
-              )
-            ),
-            new ListItem(
-              dense: true,
-              title: new Text('Show icon'),
-              trailing: new Checkbox(
-                value: _showIcons,
-                onChanged: (bool value) {
-                  setState(() {
-                    _showIcons = value;
-                  });
-                  _bottomSheet?.setState(() { });
-                }
-              )
-            ),
-            new ListItem(
-              dense: true,
-              title: new Text('Show dividers'),
-              trailing: new Checkbox(
-                value: _showDividers,
-                onChanged: (bool value) {
-                  setState(() {
-                    _showDividers = value;
-                  });
-                  _bottomSheet?.setState(() { });
-                }
-              )
-            ),
-            new ListItem(
-              dense: true,
-              title: new Text('Dense layout'),
-              trailing: new Checkbox(
-                value: _dense,
-                onChanged: (bool value) {
-                  setState(() {
-                    _dense = value;
-                  });
-                  _bottomSheet?.setState(() { });
-                }
-              )
-            )
-          ]
-        )
-      );
-    });
-  }
-
-  Widget buildListItem(BuildContext context, String item) {
-    Widget secondary;
-    if (_itemType == MaterialListType.twoLine) {
-      secondary = new Text(
-        "Additional item information."
-      );
-    } else if (_itemType == MaterialListType.threeLine) {
-      secondary = new Text(
-        "Even more additional list item information appears on line three."
-      );
-    }
-    return new ListItem(
-      isThreeLine: _itemType == MaterialListType.threeLine,
-      dense: _dense,
-      leading: _showAvatars ? new CircleAvatar(child: new Text(item)) : null,
-      title: new Text('This item represents $item.'),
-      subtitle: secondary,
-      trailing: _showIcons ? new Icon(icon: Icons.info, color: Theme.of(context).disabledColor) : null
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final String layoutText = _dense ? " \u2013 Dense" : "";
-    String  itemTypeText;
-    switch(_itemType) {
-      case MaterialListType.oneLine:
-      case MaterialListType.oneLineWithAvatar:
-        itemTypeText = 'Single-line';
-        break;
-      case MaterialListType.twoLine:
-        itemTypeText = 'Two-line';
-        break;
-      case MaterialListType.threeLine:
-        itemTypeText = 'Three-line';
-        break;
-    }
-
-    Iterable<Widget> listItems = items.map((String item) => buildListItem(context, item));
-    if (_showDividers)
-      listItems = ListItem.divideItems(context: context, items: listItems);
-
-    return new Scaffold(
-      key: scaffoldKey,
-      appBar: new AppBar(
-        title: new Text('Scrolling list\n$itemTypeText$layoutText'),
-        actions: <Widget>[
-          new IconButton(
-            icon: Icons.sort_by_alpha,
-            tooltip: 'Sort',
-            onPressed: () {
-              setState(() {
-                _reverseSort = !_reverseSort;
-                items.sort((String a, String b) => _reverseSort ? b.compareTo(a) : a.compareTo(b));
-              });
-            }
-          ),
-          new IconButton(
-            icon: Icons.more_vert,
-            tooltip: 'Show menu',
-            onPressed: () { showConfigurationSheet(context); }
-          )
-        ]
-      ),
-      body: new OverscrollIndicator(
-        child: new Scrollbar(
-          child: new MaterialList(
-            type: _itemType,
-            padding: new EdgeInsets.symmetric(vertical: _dense ? 4.0 : 8.0),
-            children: listItems
-          )
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/menu_demo.dart

@@ -1,216 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-
-class MenuDemo extends StatefulWidget {
-  MenuDemo({ Key key }) : super(key: key);
-
-  static const String routeName = '/menu';
-
-  @override
-  MenuDemoState createState() => new MenuDemoState();
-}
-
-class MenuDemoState extends State<MenuDemo> {
-  final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
-
-  final String _simpleValue1 = 'Menu item value one';
-  final String _simpleValue2 = 'Menu item value two';
-  final String _simpleValue3 = 'Menu item value three';
-  String _simpleValue;
-
-  final String _checkedValue1 = 'One';
-  final String _checkedValue2 = 'Two';
-  final String _checkedValue3 = 'Free';
-  final String _checkedValue4 = 'Four';
-  List<String> _checkedValues;
-
-  @override
-  void initState() {
-    super.initState();
-    _simpleValue = _simpleValue2;
-    _checkedValues = <String>[_checkedValue3];
-  }
-
-  void showInSnackBar(String value) {
-    _scaffoldKey.currentState.showSnackBar(new SnackBar(
-     content: new Text(value)
-    ));
-  }
-
-  void showMenuSelection(String value) {
-    if (<String>[_simpleValue1, _simpleValue2, _simpleValue3].contains(value))
-      _simpleValue = value;
-    showInSnackBar('You selected: $value');
-  }
-
-  void showCheckedMenuSelections(String value) {
-    if (_checkedValues.contains(value))
-      _checkedValues.remove(value);
-    else
-      _checkedValues.add(value);
-
-    showInSnackBar('Checked $_checkedValues');
-  }
-
-  bool isChecked(String value) => _checkedValues.contains(value);
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      key: _scaffoldKey,
-      appBar: new AppBar(
-        title: new Text('Menus'),
-        actions: <Widget>[
-          new PopupMenuButton<String>(
-            onSelected: showMenuSelection,
-            itemBuilder: (BuildContext context) => <PopupMenuItem<String>>[
-              new PopupMenuItem<String>(
-                value: 'Toolbar menu',
-                child: new Text('Toolbar menu')
-              ),
-              new PopupMenuItem<String>(
-                value: 'Right here',
-                child: new Text('Right here')
-              ),
-              new PopupMenuItem<String>(
-                value: 'Hooray!',
-                child: new Text('Hooray!')
-              ),
-            ]
-          )
-        ]
-      ),
-      body: new Block(
-        padding: const EdgeInsets.symmetric(vertical: 8.0),
-        children: <Widget>[
-          // Pressing the PopupMenuButton on the right of this item shows
-          // a simple menu with one disabled item. Typically the contents
-          // of this "contextual menu" would reflect the app's state.
-          new ListItem(
-            title: new Text('An item with a context menu button'),
-            trailing: new PopupMenuButton<String>(
-              padding: EdgeInsets.zero,
-              onSelected: showMenuSelection,
-              itemBuilder: (BuildContext context) => <PopupMenuItem<String>>[
-                new PopupMenuItem<String>(
-                  value: _simpleValue1,
-                  child: new Text('Context menu item one')
-                ),
-                new PopupMenuItem<String>(
-                  enabled: false,
-                  child: new Text('A disabled menu item')
-                ),
-                new PopupMenuItem<String>(
-                  value: _simpleValue3,
-                  child: new Text('Context menu item three')
-                ),
-              ]
-            )
-          ),
-          // Pressing the PopupMenuButton on the right of this item shows
-          // a menu whose items have text labels and icons and a divider
-          // That separates the first three items from the last one.
-          new ListItem(
-            title: new Text('An item with a sectioned menu'),
-            trailing: new PopupMenuButton<String>(
-              padding: EdgeInsets.zero,
-              onSelected: showMenuSelection,
-              itemBuilder: (BuildContext context) => <PopupMenuEntry<String>>[
-                new PopupMenuItem<String>(
-                  value: 'Preview',
-                  child: new ListItem(
-                    leading: new Icon(icon: Icons.visibility),
-                    title: new Text('Preview')
-                  )
-                ),
-                new PopupMenuItem<String>(
-                  value: 'Share',
-                  child: new ListItem(
-                    leading: new Icon(icon: Icons.person_add),
-                    title: new Text('Share')
-                  )
-                ),
-                new PopupMenuItem<String>(
-                  value: 'Get Link',
-                  child: new ListItem(
-                    leading: new Icon(icon: Icons.link),
-                    title: new Text('Get link')
-                  )
-                ),
-                new PopupMenuDivider(),
-                new PopupMenuItem<String>(
-                  value: 'Remove',
-                  child: new ListItem(
-                    leading: new Icon(icon: Icons.delete),
-                    title: new Text('Remove')
-                  )
-                )
-              ]
-            )
-          ),
-          // This entire list item is a PopupMenuButton. Tapping anywhere shows
-          // a menu whose current value is highlighted and aligned over the
-          // list item's center line.
-          new PopupMenuButton<String>(
-            padding: EdgeInsets.zero,
-            initialValue: _simpleValue,
-            onSelected: showMenuSelection,
-            child: new ListItem(
-              title: new Text('An item with a simple menu'),
-              subtitle: new Text(_simpleValue)
-            ),
-            itemBuilder: (BuildContext context) => <PopupMenuItem<String>>[
-              new PopupMenuItem<String>(
-                value: _simpleValue1,
-                child: new Text(_simpleValue1)
-              ),
-              new PopupMenuItem<String>(
-                value: _simpleValue2,
-                child: new Text(_simpleValue2)
-              ),
-              new PopupMenuItem<String>(
-                value: _simpleValue3,
-                child: new Text(_simpleValue3)
-              )
-            ]
-          ),
-          // Pressing the PopupMenuButton on the right of this item shows a menu
-          // whose items have checked icons that reflect this app's state.
-          new ListItem(
-            title: new Text('An item with a checklist menu'),
-            trailing: new PopupMenuButton<String>(
-              padding: EdgeInsets.zero,
-              onSelected: showCheckedMenuSelections,
-              itemBuilder: (BuildContext context) => <PopupMenuItem<String>>[
-                new CheckedPopupMenuItem<String>(
-                  value: _checkedValue1,
-                  checked: isChecked(_checkedValue1),
-                  child: new Text(_checkedValue1)
-                ),
-                new CheckedPopupMenuItem<String>(
-                  value: _checkedValue2,
-                  enabled: false,
-                  checked: isChecked(_checkedValue2),
-                  child: new Text(_checkedValue2)
-                ),
-                new CheckedPopupMenuItem<String>(
-                  value: _checkedValue3,
-                  checked: isChecked(_checkedValue3),
-                  child: new Text(_checkedValue3)
-                ),
-                new CheckedPopupMenuItem<String>(
-                  value: _checkedValue4,
-                  checked: isChecked(_checkedValue4),
-                  child: new Text(_checkedValue4)
-                )
-              ]
-            )
-          )
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/modal_bottom_sheet_demo.dart

@@ -1,39 +0,0 @@
-// 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:flutter/material.dart';
-
-final TextStyle _kTextStyle = new TextStyle(
-  color: Colors.indigo[400],
-  fontSize: 24.0
-);
-
-class ModalBottomSheetDemo extends StatelessWidget {
-  static const String routeName = '/modal-bottom-sheet';
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Modal bottom sheet')),
-      body: new Center(
-        child: new RaisedButton(
-          child: new Text('SHOW BOTTOM SHEET'),
-          onPressed: () {
-            showModalBottomSheet/*<Null>*/(context: context, builder: (BuildContext context) {
-              return new Container(
-                child: new Padding(
-                  padding: const EdgeInsets.all(32.0),
-                  child: new Text('This is the modal bottom sheet. Click anywhere to dismiss.',
-                    style: _kTextStyle,
-                    textAlign: TextAlign.center
-                  )
-                )
-              );
-            });
-          }
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/overscroll_demo.dart

@@ -1,95 +0,0 @@
-// Copyright 2016 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:async';
-
-import 'package:flutter/material.dart';
-
-enum IndicatorType { overscroll, refresh }
-
-class OverscrollDemo extends StatefulWidget {
-  OverscrollDemo({ Key key }) : super(key: key);
-
-  static const String routeName = '/overscroll';
-
-  @override
-  OverscrollDemoState createState() => new OverscrollDemoState();
-}
-
-class OverscrollDemoState extends State<OverscrollDemo> {
-  static final List<String> _items = <String>[
-    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N'
-  ];
-
-  IndicatorType _type = IndicatorType.refresh;
-
-  Future<Null> refresh() {
-    Completer<Null> completer = new Completer<Null>();
-    new Timer(new Duration(seconds: 3), () { completer.complete(null); });
-    return completer.future;
-  }
-
-
-  @override
-  Widget build(BuildContext context) {
-    String  indicatorTypeText;
-    switch(_type) {
-      case IndicatorType.overscroll:
-        indicatorTypeText = 'Over-scroll indicator';
-        break;
-      case IndicatorType.refresh:
-        indicatorTypeText = 'Refresh indicator';
-        break;
-    }
-
-    Widget body = new MaterialList(
-      type: MaterialListType.threeLine,
-      padding: const EdgeInsets.all(8.0),
-      children: _items.map((String item) {
-        return new ListItem(
-          isThreeLine: true,
-          leading: new CircleAvatar(child: new Text(item)),
-          title: new Text('This item represents $item.'),
-          subtitle: new Text('Even more additional list item information appears on line three.')
-        );
-      })
-    );
-    switch(_type) {
-      case IndicatorType.overscroll:
-        body = new OverscrollIndicator(child: body);
-        break;
-      case IndicatorType.refresh:
-        body = new RefreshIndicator(child: body, refresh: refresh);
-        break;
-    }
-
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('$indicatorTypeText'),
-        actions: <Widget>[
-          new IconButton(
-            icon: Icons.refresh,
-            tooltip: 'Pull to refresh',
-            onPressed: () {
-              setState(() {
-                _type = IndicatorType.refresh;
-              });
-            }
-          ),
-          new IconButton(
-            icon: Icons.play_for_work,
-            tooltip: 'Over-scroll indicator',
-            onPressed: () {
-              setState(() {
-                _type = IndicatorType.overscroll;
-              });
-            }
-          )
-        ]
-      ),
-      body: body
-    );
-  }
-
-}

examples/flutter_gallery/material_gallery/lib/demo/page_selector_demo.dart

@@ -1,81 +0,0 @@
-// 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:flutter/material.dart';
-
-class PageSelectorDemo extends StatelessWidget {
-
-  static const String routeName = '/page-selector';
-
-  void _handleArrowButtonPress(BuildContext context, int delta) {
-    final TabBarSelectionState<IconData> selection = TabBarSelection.of/*<IconData>*/(context);
-    if (!selection.valueIsChanging)
-      selection.value = selection.values[(selection.index + delta).clamp(0, selection.values.length - 1)];
-  }
-
-  @override
-  Widget build(BuildContext notUsed) { // Can't find the TabBarSelection from this context.
-    final List<IconData> icons = <IconData>[
-      Icons.event,
-      Icons.home,
-      Icons.android,
-      Icons.alarm,
-      Icons.face,
-      Icons.language,
-    ];
-
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Page selector')),
-      body: new TabBarSelection<IconData>(
-        values: icons,
-        child: new Builder(
-          builder: (BuildContext context) {
-            final Color color = Theme.of(context).accentColor;
-            return new Column(
-              children: <Widget>[
-                new Container(
-                  margin: const EdgeInsets.only(top: 16.0),
-                  child: new Row(
-                    children: <Widget>[
-                      new IconButton(
-                        icon: Icons.arrow_back,
-                        color: color,
-                        onPressed: () { _handleArrowButtonPress(context, -1); },
-                        tooltip: 'Page back'
-                      ),
-                      new TabPageSelector<IconData>(),
-                      new IconButton(
-                        icon: Icons.arrow_forward,
-                        color: color,
-                        onPressed: () { _handleArrowButtonPress(context, 1); },
-                        tooltip: 'Page forward'
-                      )
-                    ],
-                    mainAxisAlignment: MainAxisAlignment.spaceBetween
-                  )
-                ),
-                new Flexible(
-                  child: new TabBarView<IconData>(
-                    children: icons.map((IconData icon) {
-                      return new Container(
-                        key: new ObjectKey(icon),
-                        padding: const EdgeInsets.all(12.0),
-                        child: new Card(
-                          child: new Center(
-                            child: new Icon(icon: icon, size: 128.0, color: color)
-                          )
-                        )
-                      );
-                    })
-                    .toList()
-                  )
-                )
-              ]
-            );
-          }
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/persistent_bottom_sheet_demo.dart

@@ -1,73 +0,0 @@
-// 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:flutter/material.dart';
-
-final TextStyle _kTextStyle = new TextStyle(
-  color: Colors.indigo[400],
-  fontSize: 24.0
-);
-
-class PersistentBottomSheetDemo extends StatefulWidget {
-  static const String routeName = '/persistent-bottom-sheet';
-
-  @override
-  _PersistentBottomSheetDemoState createState() => new _PersistentBottomSheetDemoState();
-}
-
-class _PersistentBottomSheetDemoState extends State<PersistentBottomSheetDemo> {
-  final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
-
-  VoidCallback _showBottomSheetCallback;
-
-  @override
-  void initState() {
-    super.initState();
-    _showBottomSheetCallback = showBottomSheet;
-  }
-
-
-  void showBottomSheet() {
-    setState(() { // disable the button
-      _showBottomSheetCallback = null;
-    });
-    _scaffoldKey.currentState.showBottomSheet/*<Null>*/((BuildContext context) {
-      return new Container(
-        decoration: new BoxDecoration(
-          border: new Border(top: new BorderSide(color: Colors.black26))
-        ),
-        child: new Padding(
-          padding: const EdgeInsets.all(32.0),
-          child: new Text('This is a Material persistent bottom sheet. Drag downwards to dismiss it.',
-            style: _kTextStyle,
-            textAlign: TextAlign.center
-          )
-        )
-      );
-    })
-    .closed.then((_) {
-      setState(() { // re-enable the button
-        _showBottomSheetCallback = showBottomSheet;
-      });
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      key: _scaffoldKey,
-      appBar: new AppBar(title: new Text('Persistent bottom sheet')),
-      floatingActionButton: new FloatingActionButton(
-        child: new Icon(icon: Icons.add),
-        backgroundColor: Colors.redAccent[200]
-      ),
-      body: new Center(
-        child: new RaisedButton(
-          onPressed: _showBottomSheetCallback,
-          child: new Text('SHOW BOTTOM SHEET')
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/progress_indicator_demo.dart

@@ -1,113 +0,0 @@
-// 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:flutter/material.dart';
-
-class ProgressIndicatorDemo extends StatefulWidget {
-  static const String routeName = '/progress-indicator';
-
-  @override
-  _ProgressIndicatorDemoState createState() => new _ProgressIndicatorDemoState();
-}
-
-class _ProgressIndicatorDemoState extends State<ProgressIndicatorDemo> {
-  AnimationController _controller;
-  Animation<double> _animation;
-
-  @override
-  void initState() {
-    super.initState();
-    _controller = new AnimationController(
-      duration: const Duration(milliseconds: 1500)
-    )..forward();
-
-    _animation = new CurvedAnimation(
-      parent: _controller,
-      curve: new Interval(0.0, 0.9, curve: Curves.ease),
-      reverseCurve: Curves.ease
-    )..addStatusListener((AnimationStatus status) {
-      if (status == AnimationStatus.dismissed)
-        _controller.forward();
-      else if (status == AnimationStatus.completed)
-        _controller.reverse();
-    });
-  }
-
-  @override
-  void dispose() {
-    _controller.stop();
-    super.dispose();
-  }
-
-  void _handleTap() {
-    setState(() {
-      // valueAnimation.isAnimating is part of our build state
-      if (_controller.isAnimating) {
-        _controller.stop();
-      } else {
-        switch (_controller.status) {
-          case AnimationStatus.dismissed:
-          case AnimationStatus.forward:
-            _controller.forward();
-            break;
-          case AnimationStatus.reverse:
-          case AnimationStatus.completed:
-            _controller.reverse();
-            break;
-        }
-      }
-    });
-  }
-
-  Widget _buildIndicators(BuildContext context, Widget child) {
-    List<Widget> indicators = <Widget>[
-        new SizedBox(
-          width: 200.0,
-          child: new LinearProgressIndicator()
-        ),
-        new LinearProgressIndicator(),
-        new LinearProgressIndicator(),
-        new LinearProgressIndicator(value: _animation.value),
-        new CircularProgressIndicator(),
-        new SizedBox(
-            width: 20.0,
-            height: 20.0,
-            child: new CircularProgressIndicator(value: _animation.value)
-        ),
-        new SizedBox(
-          width: 50.0,
-          height: 30.0,
-          child: new CircularProgressIndicator(value: _animation.value)
-        ),
-        new Text('${(_animation.value * 100.0).toStringAsFixed(1)}%${ _controller.isAnimating ? "" : " (paused)" }')
-    ];
-    return new Column(
-      children: indicators
-        .map((Widget c) => new Container(child: c, margin: const EdgeInsets.symmetric(vertical: 15.0, horizontal: 20.0)))
-        .toList(),
-      mainAxisAlignment: MainAxisAlignment.center
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Progress indicators')),
-      body: new DefaultTextStyle(
-        style: Theme.of(context).textTheme.title,
-        child: new GestureDetector(
-          onTap: _handleTap,
-          behavior: HitTestBehavior.opaque,
-          child: new Container(
-            padding: const EdgeInsets.symmetric(vertical: 12.0, horizontal: 8.0),
-            child: new AnimatedBuilder(
-              animation: _animation,
-              builder: _buildIndicators
-            )
-          )
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/scrollable_tabs_demo.dart

@@ -1,111 +0,0 @@
-// 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:flutter/material.dart';
-
-enum TabsDemoStyle {
-  iconsAndText,
-  iconsOnly,
-  textOnly
-}
-
-class ScrollableTabsDemo extends StatefulWidget {
-  static const String routeName = '/scrollable-tabs';
-
-  @override
-  ScrollableTabsDemoState createState() => new ScrollableTabsDemoState();
-}
-
-class ScrollableTabsDemoState extends State<ScrollableTabsDemo> {
-  final List<IconData> icons = <IconData>[
-    Icons.event,
-    Icons.home,
-    Icons.android,
-    Icons.alarm,
-    Icons.face,
-    Icons.language,
-  ];
-
-  final Map<IconData, String> labels = <IconData, String>{
-    Icons.event: 'EVENT',
-    Icons.home: 'HOME',
-    Icons.android: 'ANDROID',
-    Icons.alarm: 'ALARM',
-    Icons.face: 'FACE',
-    Icons.language: 'LANGUAGE',
-  };
-
-  TabsDemoStyle _demoStyle = TabsDemoStyle.iconsAndText;
-
-  void changeDemoStyle(TabsDemoStyle style) {
-    setState(() {
-      _demoStyle = style;
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final Color iconColor = Theme.of(context).accentColor;
-    return new TabBarSelection<IconData>(
-      values: icons,
-      child: new Scaffold(
-        appBar: new AppBar(
-          title: new Text('Scrollable tabs'),
-          actions: <Widget>[
-            new PopupMenuButton<TabsDemoStyle>(
-              onSelected: changeDemoStyle,
-              itemBuilder: (BuildContext context) => <PopupMenuItem<TabsDemoStyle>>[
-                new PopupMenuItem<TabsDemoStyle>(
-                  value: TabsDemoStyle.iconsAndText,
-                  child: new Text('Icons and text')
-                ),
-                new PopupMenuItem<TabsDemoStyle>(
-                  value: TabsDemoStyle.iconsOnly,
-                  child: new Text('Icons only')
-                ),
-                new PopupMenuItem<TabsDemoStyle>(
-                  value: TabsDemoStyle.textOnly,
-                  child: new Text('Text only')
-                ),
-              ]
-            )
-          ],
-          tabBar: new TabBar<IconData>(
-            isScrollable: true,
-            labels: new Map<IconData, TabLabel>.fromIterable(
-              icons,
-              value: (IconData icon) {
-                switch(_demoStyle) {
-                  case TabsDemoStyle.iconsAndText:
-                    return new TabLabel(text: labels[icon], icon: icon);
-                  case TabsDemoStyle.iconsOnly:
-                    return new TabLabel(icon: icon);
-                  case TabsDemoStyle.textOnly:
-                    return new TabLabel(text: labels[icon]);
-                }
-              }
-            )
-          )
-        ),
-        body: new TabBarView<IconData>(
-          children: icons.map((IconData icon) {
-            return new Container(
-              key: new ObjectKey(icon),
-              padding: const EdgeInsets.all(12.0),
-              child:new Card(
-                child: new Center(
-                  child: new Icon(
-                    icon: icon,
-                    color: iconColor,
-                    size: 128.0
-                  )
-                )
-              )
-            );
-          }).toList()
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/scrolling_techniques_demo.dart

@@ -1,159 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-
-import 'flexible_space_demo.dart';
-
-class _BarGraphic extends StatelessWidget {
-  _BarGraphic({ Key key, this.height, this.color, this.leftText, this.rightText: '' })
-    : super(key: key) {
-    assert(height != null);
-    assert(color != null);
-    assert(leftText != null);
-  }
-
-  final double height;
-  final Color color;
-  final String leftText;
-  final String rightText;
-
-  @override
-  Widget build(BuildContext context) {
-    return new Container(
-      height: height,
-      width: 200.0,
-      padding: const EdgeInsets.symmetric(horizontal: 16.0),
-      decoration: new BoxDecoration(backgroundColor: color),
-      child: new DefaultTextStyle(
-        style: Theme.of(context).textTheme.body1.copyWith(color: Colors.white),
-        child: new Row(
-          mainAxisAlignment: MainAxisAlignment.spaceBetween,
-          children: <Widget>[
-            new Text(leftText),
-            new Text(rightText)
-          ]
-        )
-      )
-    );
-  }
-}
-
-class _StatusBarGraphic extends _BarGraphic {
-  _StatusBarGraphic() : super(
-    height: 24.0,
-    color: Colors.green[400],
-    leftText: 'Status Bar',
-    rightText: '24dp'
-  );
-}
-
-class _AppBarGraphic extends _BarGraphic {
-  _AppBarGraphic() : super(
-    height: 48.0,
-    color: Colors.blue[400],
-    leftText: 'Tool Bar',
-    rightText: '48dp'
-  );
-}
-
-class _TabBarGraphic extends _BarGraphic {
-  _TabBarGraphic() : super(
-    height: 48.0,
-    color: Colors.purple[400],
-    leftText: 'Tab Bar',
-    rightText: '56dp'
-  );
-}
-
-class _FlexibleSpaceGraphic extends _BarGraphic {
-  _FlexibleSpaceGraphic() : super(
-    height: 128.0,
-    color: Colors.pink[400],
-    leftText: 'Flexible Space'
-  );
-}
-
-class _TechniqueItem extends StatelessWidget {
-  _TechniqueItem({ this.titleText, this.barGraphics, this.builder });
-
-  final String titleText;
-  final List<Widget> barGraphics;
-  final WidgetBuilder builder;
-
-  void showDemo(BuildContext context) {
-    Navigator.push(context, new MaterialPageRoute<Null>(builder: builder));
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new Card(
-      child: new InkWell(
-        onTap: () { showDemo(context); },
-        child: new Padding(
-          padding: const EdgeInsets.all(16.0),
-          child: new Row(
-            mainAxisAlignment: MainAxisAlignment.spaceBetween,
-            children :<Widget>[
-              new Text(titleText),
-              new Column(children: barGraphics)
-            ]
-          )
-        )
-      )
-    );
-  }
-}
-
-const String _introText =
-  "An AppBar is a combination of a ToolBar and a TabBar or a flexible space "
-  "Widget that is managed by the Scaffold. The Scaffold pads the ToolBar so that "
-  "it appears behind the device's status bar. When a flexible space Widget is "
-  "specified it is stacked on top of the ToolBar.";
-
-class ScrollingTechniquesDemo extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Scrolling techniques')),
-      body: new Padding(
-        padding: const EdgeInsets.symmetric(horizontal: 16.0),
-        child: new Block(
-          children: <Widget>[
-            new Padding(
-              padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 32.0),
-              child: new Text(_introText, style: Theme.of(context).textTheme.caption)
-            ),
-            new _TechniqueItem(
-              builder: (BuildContext context) => new FlexibleSpaceDemo(),
-              titleText: 'Standard',
-              barGraphics: <Widget>[
-                new _StatusBarGraphic(),
-                new _AppBarGraphic()
-              ]
-            ),
-            new _TechniqueItem(
-              titleText: 'Tabs',
-              builder: (BuildContext context) => new FlexibleSpaceDemo(),
-              barGraphics: <Widget>[
-                new _StatusBarGraphic(),
-                new _AppBarGraphic(),
-                new _TabBarGraphic()
-              ]
-            ),
-            new _TechniqueItem(
-              titleText: 'Flexible',
-              builder: (BuildContext context) => new FlexibleSpaceDemo(),
-              barGraphics: <Widget>[
-                new _StatusBarGraphic(),
-                new _AppBarGraphic(),
-                new _FlexibleSpaceGraphic()
-              ]
-            )
-          ]
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/selection_controls_demo.dart

@@ -1,180 +0,0 @@
-// 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:flutter/material.dart';
-
-import '../gallery/demo.dart';
-
-const String _checkboxText =
-  "# Checkboxes\n"
-  "Checkboxes allow the user to select multiple options from a set.";
-
-const String _checkboxCode = 'selectioncontrols_checkbox';
-
-const String _radioText =
-  "# Radio buttons\n"
-  "Radio buttons allow the user to select one option from a set. Use radio "
-  "buttons for exclusive selection if you think that the user needs to see "
-  "all available options side-by-side.";
-
-const String _radioCode = 'selectioncontrols_radio';
-
-const String _switchText =
-  "# Switches\n"
-  "On/off switches toggle the state of a single settings option. The option "
-  "that the switch controls, as well as the state it’s in, should be made "
-  "clear from the corresponding inline label.";
-
-const String _switchCode = 'selectioncontrols_switch';
-
-class SelectionControlsDemo extends StatefulWidget {
-  static const String routeName = '/selection-controls';
-
-  @override
-  _SelectionControlsDemoState createState() => new _SelectionControlsDemoState();
-}
-
-class _SelectionControlsDemoState extends State<SelectionControlsDemo> {
-  @override
-  Widget build(BuildContext context) {
-    List<ComponentDemoTabData> demos = <ComponentDemoTabData>[
-      new ComponentDemoTabData(
-        tabName: "CHECKBOX",
-        description: _checkboxText,
-        widget: buildCheckbox(),
-        exampleCodeTag: _checkboxCode
-      ),
-      new ComponentDemoTabData(
-        tabName: "RADIO",
-        description: _radioText,
-        widget: buildRadio(),
-        exampleCodeTag: _radioCode
-      ),
-      new ComponentDemoTabData(
-        tabName: "SWITCH",
-        description: _switchText,
-        widget: buildSwitch(),
-        exampleCodeTag: _switchCode
-      )
-    ];
-
-    return new TabbedComponentDemoScaffold(
-      title: 'Selection controls',
-      demos: demos
-    );
-  }
-
-  bool checkboxValueA = true;
-  bool checkboxValueB = false;
-  int radioValue = 0;
-  bool switchValue = false;
-
-  void handleRadioValueChanged(int value) {
-    setState(() {
-      radioValue = value;
-    });
-  }
-
-  Widget buildCheckbox() {
-    return new Align(
-      alignment: new FractionalOffset(0.5, 0.4),
-      child: new Column(
-        mainAxisAlignment: MainAxisAlignment.collapse,
-        children: <Widget>[
-          new Row(
-            mainAxisAlignment: MainAxisAlignment.collapse,
-            children: <Widget>[
-              new Checkbox(value: checkboxValueA, onChanged: (bool value) {
-                setState(() {
-                  checkboxValueA = value;
-                });
-              }),
-              new Checkbox(value: checkboxValueB, onChanged: (bool value) {
-                setState(() {
-                  checkboxValueB = value;
-                });
-              })
-            ]
-          ),
-          new Row(
-            mainAxisAlignment: MainAxisAlignment.collapse,
-            children: <Widget>[
-              // Disabled checkboxes
-              new Checkbox(value: true),
-              new Checkbox(value: false)
-            ]
-          )
-        ]
-      )
-    );
-  }
-
-  Widget buildRadio() {
-    return new Align(
-      alignment: new FractionalOffset(0.5, 0.4),
-      child: new Column(
-        mainAxisAlignment: MainAxisAlignment.collapse,
-        children: <Widget>[
-          new Row(
-            mainAxisAlignment: MainAxisAlignment.collapse,
-            children: <Widget>[
-              new Radio<int>(
-                value: 0,
-                groupValue: radioValue,
-                onChanged: handleRadioValueChanged
-              ),
-              new Radio<int>(
-                value: 1,
-                groupValue: radioValue,
-                onChanged: handleRadioValueChanged
-              ),
-              new Radio<int>(
-                value: 2,
-                groupValue: radioValue,
-                onChanged: handleRadioValueChanged
-              )
-            ]
-          ),
-          // Disabled radio buttons
-          new Row(
-            mainAxisAlignment: MainAxisAlignment.collapse,
-            children: <Widget>[
-              new Radio<int>(
-                value: 0,
-                groupValue: 0
-              ),
-              new Radio<int>(
-                value: 1,
-                groupValue: 0
-              ),
-              new Radio<int>(
-                value: 2,
-                groupValue: 0
-              )
-            ]
-          )
-        ]
-      )
-    );
-  }
-
-  Widget buildSwitch() {
-    return new Align(
-      alignment: new FractionalOffset(0.5, 0.4),
-      child: new Row(
-        mainAxisAlignment: MainAxisAlignment.collapse,
-        children: <Widget>[
-          new Switch(value: switchValue, onChanged: (bool value) {
-            setState(() {
-              switchValue = value;
-            });
-          }),
-          // Disabled switches
-          new Switch(value: true),
-          new Switch(value: false)
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/slider_demo.dart

@@ -1,56 +0,0 @@
-// 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:flutter/material.dart';
-
-class SliderDemo extends StatefulWidget {
-  static const String routeName = '/slider';
-
-  @override
-  _SliderDemoState createState() => new _SliderDemoState();
-}
-
-class _SliderDemoState extends State<SliderDemo> {
-  double _value = 25.0;
-  double _discreteValue = 20.0;
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Sliders')),
-      body: new Column(
-        mainAxisAlignment: MainAxisAlignment.spaceAround,
-        children: <Widget>[
-          new Center(
-            child: new Slider(
-              value: _value,
-              min: 0.0,
-              max: 100.0,
-              onChanged: (double value) {
-                setState(() {
-                  _value = value;
-                });
-              }
-            )
-          ),
-          new Center(child: new Slider(value: _value / 100.0)),
-          new Center(
-            child: new Slider(
-              value: _discreteValue,
-              min: 0.0,
-              max: 100.0,
-              divisions: 5,
-              label: '${_discreteValue.round()}',
-              onChanged: (double value) {
-                setState(() {
-                  _discreteValue = value;
-                });
-              }
-            )
-          ),
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/snack_bar_demo.dart

@@ -1,84 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:flutter/widgets.dart';
-
-const String _text1 =
-  "Snackbars provide lightweight feedback about an operation by "
-  "showing a brief message at the bottom of the screen. Snackbars "
-  "can contain an action.";
-
-const String _text2 =
-  "Snackbars should contain a single line of text directly related "
-  "to the operation performed. They cannot contain icons.";
-
-const String _text3 =
-  "By default snackbars automatically disappear after a few seconds ";
-
-class SnackBarDemo extends StatefulWidget {
-  SnackBarDemo({ Key key }) : super(key: key);
-
-  static const String routeName = '/snack-bar';
-
-  @override
-  _SnackBarDemoState createState() => new _SnackBarDemoState();
-}
-
-class _SnackBarDemoState extends State<SnackBarDemo> {
-  int _snackBarIndex = 1;
-
-  Widget buildBody(BuildContext context) {
-    return new Padding(
-      padding: const EdgeInsets.all(24.0),
-      child: new Block(
-        children: <Widget>[
-          new Text(_text1),
-          new Text(_text2),
-          new Center(
-            child: new RaisedButton(
-              child: new Text('SHOW A SNACKBAR'),
-              onPressed: () {
-                final int thisSnackBarIndex = _snackBarIndex++;
-                Scaffold.of(context).showSnackBar(new SnackBar(
-                  content: new Text('This is snackbar #$thisSnackBarIndex.'),
-                  action: new SnackBarAction(
-                    label: 'ACTION',
-                    onPressed: () {
-                      Scaffold.of(context).showSnackBar(new SnackBar(
-                        content: new Text('You pressed snackbar $thisSnackBarIndex\'s action.')
-                      ));
-                    }
-                  )
-                ));
-              }
-            )
-          ),
-          new Text(_text3),
-        ]
-        .map((Widget child) {
-          return new Container(
-            margin: const EdgeInsets.symmetric(vertical: 12.0),
-            child: child
-          );
-        })
-        .toList()
-      )
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('Snackbar')
-      ),
-      body: new Builder(
-        // Create an inner BuildContext so that the snackBar onPressed methods
-        // can refer to the Scaffold with Scaffold.of().
-        builder: buildBody
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/tabs_demo.dart

@@ -1,82 +0,0 @@
-// 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:flutter/material.dart';
-
-class _Page {
-  _Page({ this.label });
-
-  final GlobalKey<ScrollableState<Scrollable>> key = new GlobalKey<ScrollableState<Scrollable>>();
-  final String label;
-}
-
-final List<_Page> _pages = <_Page>[
-  new _Page(label: 'ONE'),
-  new _Page(label: 'TWO'),
-  new _Page(label: 'FREE'),
-  new _Page(label: 'FOUR')
-];
-
-class TabsDemo extends StatefulWidget {
-  static const String routeName = '/tabs';
-
-  @override
-  TabsDemoState createState() => new TabsDemoState();
-}
-
-class TabsDemoState extends State<TabsDemo> {
-  _Page _selectedPage;
-  double _scrollOffset = 0.0;
-
-  @override
-  void initState() {
-    super.initState();
-    _selectedPage = _pages[0];
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final double statusBarHeight = MediaQuery.of(context).padding.top;
-    return new TabBarSelection<_Page>(
-      values: _pages,
-      onChanged: (_Page value) {
-        setState(() {
-          _selectedPage = value;
-          _selectedPage.key.currentState.scrollTo(_scrollOffset);
-        });
-      },
-      child: new Scaffold(
-        appBarBehavior: AppBarBehavior.under,
-        appBar: new AppBar(
-          title: new Text('Tabs and scrolling'),
-          tabBar: new TabBar<_Page>(
-            labels: new Map<_Page, TabLabel>.fromIterable(_pages, value: (_Page page) {
-              return new TabLabel(text: page.label);
-            })
-          )
-        ),
-        body: new TabBarView<_Page>(
-          children: _pages.map((_Page page) {
-            return new Block(
-              padding: new EdgeInsets.only(top: kTextTabBarHeight + kToolBarHeight + statusBarHeight),
-              scrollableKey: page.key,
-              onScroll: (double value) { _scrollOffset = value; },
-              children: new List<Widget>.generate(6, (int i) {
-                return new Container(
-                  padding: const EdgeInsets.all(8.0),
-                  height: 192.0,
-                  child: new Card(
-                    child: new Center(
-                      child: new Text('Tab $page.label, item $i')
-                    )
-                  )
-                );
-              })
-            );
-          }).toList()
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/tabs_fab_demo.dart

@@ -1,118 +0,0 @@
-// 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:flutter/material.dart';
-
-class _Page {
-  _Page({ this.label, this.colors, this.icon });
-
-  final String label;
-  final Map<int, Color> colors;
-  final IconData icon;
-
-  TabLabel get tabLabel => new TabLabel(text: label.toUpperCase());
-  Color get labelColor => colors != null ? colors[300] : Colors.grey[300];
-  bool get fabDefined => colors != null && icon != null;
-  Color get fabColor => colors[400];
-  Icon get fabIcon => new Icon(icon: icon);
-  Key get fabKey => new ValueKey<Color>(fabColor);
-}
-
-const String _explanatoryText =
-  "When the Scaffold's floating action button changes, the new button fades and "
-  "turns into view. In this demo, changing tabs can cause the app to be rebuilt "
-  "with a FloatingActionButton that the Scaffold distinguishes from the others "
-  "by its key.";
-
-class TabsFabDemo extends StatefulWidget {
-  static const String routeName = '/tabs-fab';
-
-  @override
-  _TabsFabDemoState createState() => new _TabsFabDemoState();
-}
-
-class _TabsFabDemoState extends State<TabsFabDemo> {
-  final GlobalKey<ScaffoldState> scaffoldKey = new GlobalKey<ScaffoldState>();
-  final List<_Page> pages = <_Page>[
-    new _Page(label: 'Blue', colors: Colors.indigo, icon: Icons.add),
-    new _Page(label: 'Eco', colors: Colors.green, icon: Icons.create),
-    new _Page(label: 'No'),
-    new _Page(label: 'Teal', colors: Colors.teal, icon: Icons.add),
-    new _Page(label: 'Red', colors: Colors.red, icon: Icons.create),
-  ];
-  _Page selectedPage;
-
-  @override
-  void initState() {
-    super.initState();
-    selectedPage = pages[0];
-  }
-
-  void _handleTabSelection(_Page page) {
-    setState(() {
-      selectedPage = page;
-    });
-  }
-
-  void _showExplanatoryText() {
-    scaffoldKey.currentState.showBottomSheet((BuildContext context) {
-      return new Container(
-        decoration: new BoxDecoration(
-          border: new Border(top: new BorderSide(color: Theme.of(context).dividerColor))
-        ),
-        child: new Padding(
-          padding: const EdgeInsets.all(32.0),
-          child: new Text(_explanatoryText, style: Theme.of(context).textTheme.subhead)
-        )
-      );
-    });
-  }
-
-  Widget buildTabView(_Page page) {
-    return new Builder(
-      builder: (BuildContext context) {
-        return new Container(
-          key: new ValueKey<String>(page.label),
-          padding: const EdgeInsets.fromLTRB(48.0, 48.0, 48.0, 96.0),
-          child: new Card(
-            child: new Center(
-              child: new Text(page.label,
-                style: new TextStyle(
-                  color: page.labelColor,
-                  fontSize: 32.0
-                ),
-                textAlign: TextAlign.center
-              )
-            )
-          )
-        );
-      }
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new TabBarSelection<_Page>(
-      values: pages,
-      onChanged: _handleTabSelection,
-      child: new Scaffold(
-        key: scaffoldKey,
-        appBar: new AppBar(
-          title: new Text('FAB per tab'),
-          tabBar: new TabBar<_Page>(
-            labels: new Map<_Page, TabLabel>.fromIterable(pages, value: (_Page page) => page.tabLabel)
-          )
-        ),
-        floatingActionButton: !selectedPage.fabDefined ? null : new FloatingActionButton(
-          key: selectedPage.fabKey,
-          tooltip: 'Show explanation',
-          backgroundColor: selectedPage.fabColor,
-          child: selectedPage.fabIcon,
-          onPressed: _showExplanatoryText
-        ),
-        body: new TabBarView<_Page>(children: pages.map(buildTabView).toList())
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/text_field_demo.dart

@@ -1,120 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-
-class TextFieldDemo extends StatefulWidget {
-  TextFieldDemo({ Key key }) : super(key: key);
-
-  static const String routeName = '/text-field';
-
-  @override
-  TextFieldDemoState createState() => new TextFieldDemoState();
-}
-
-class PersonData {
-  String name;
-  String phoneNumber;
-  String password;
-}
-
-class TextFieldDemoState extends State<TextFieldDemo> {
-  final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
-
-  PersonData person = new PersonData();
-
-  void showInSnackBar(String value) {
-    _scaffoldKey.currentState.showSnackBar(new SnackBar(
-      content: new Text(value)
-    ));
-  }
-
-  void _handleSubmitted() {
-    showInSnackBar('${person.name}\'s phone number is ${person.phoneNumber}');
-  }
-
-  String _validateName(String value) {
-    if (value.isEmpty)
-      return 'Name is required.';
-    RegExp nameExp = new RegExp(r'^[A-za-z ]+$');
-    if (!nameExp.hasMatch(value))
-      return 'Please enter only alphabetical characters.';
-    return null;
-  }
-
-  String _validatePhoneNumber(String value) {
-    RegExp phoneExp = new RegExp(r'^\d\d\d-\d\d\d\-\d\d\d\d$');
-    if (!phoneExp.hasMatch(value))
-      return '###-###-#### - Please enter a valid phone number.';
-    return null;
-  }
-
-  String _validatePassword(String value) {
-    if (person.password == null || person.password.isEmpty)
-      return 'Please choose a password.';
-    if (person.password != value)
-      return 'Passwords don\'t match';
-    return null;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      key: _scaffoldKey,
-      appBar: new AppBar(
-        title: new Text('Text fields')
-      ),
-      body: new Form(
-        onSubmitted: _handleSubmitted,
-        child: new Block(
-          padding: const EdgeInsets.all(8.0),
-          children: <Widget>[
-            new Input(
-              hintText: 'What do people call you?',
-              labelText: 'Name',
-              formField: new FormField<String>(
-                // TODO(mpcomplete): replace with person#name=
-                setter:  (String val) { person.name = val; },
-                validator: _validateName
-              )
-            ),
-            new Input(
-              hintText: 'Where can we reach you?',
-              labelText: 'Phone Number',
-              formField: new FormField<String>(
-                setter: (String val) { person.phoneNumber = val; },
-                validator: _validatePhoneNumber
-              )
-            ),
-            new Row(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: <Widget>[
-                new Flexible(
-                  child: new Input(
-                    hintText: 'How do you log in?',
-                    labelText: 'New Password',
-                    hideText: true,
-                    formField: new FormField<String>(
-                      setter: (String val) { person.password = val; }
-                    )
-                  )
-                ),
-                new Flexible(
-                  child: new Input(
-                    hintText: 'How do you log in?',
-                    labelText: 'Re-type Password',
-                    hideText: true,
-                    formField: new FormField<String>(
-                      validator: _validatePassword
-                    )
-                  )
-                )
-              ]
-            )
-          ]
-        )
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/time_picker_demo.dart

@@ -1,48 +0,0 @@
-// 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:async';
-
-import 'package:flutter/material.dart';
-
-class TimePickerDemo extends StatefulWidget {
-  static const String routeName = '/time-picker';
-
-  @override
-  _TimePickerDemoState createState() => new _TimePickerDemoState();
-}
-
-class _TimePickerDemoState extends State<TimePickerDemo> {
-  TimeOfDay _selectedTime = const TimeOfDay(hour: 7, minute: 28);
-
-  Future<Null> _handleSelectTime() async {
-    TimeOfDay picked = await showTimePicker(
-      context: context,
-      initialTime: _selectedTime
-    );
-    if (picked != _selectedTime) {
-      setState(() {
-        _selectedTime = picked;
-      });
-    }
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Time picker')),
-      body: new Column(
-        mainAxisAlignment: MainAxisAlignment.center,
-        children: <Widget>[
-          new Text('$_selectedTime'),
-          new SizedBox(height: 20.0),
-          new RaisedButton(
-            onPressed: _handleSelectTime,
-            child: new Text('SELECT TIME')
-          ),
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/tooltip_demo.dart

@@ -1,68 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-
-const String _introText =
-  "Tooltips are short identifying messages that briefly appear in response to "
-  "a long press. Tooltip messages are also used by services that make Flutter "
-  "apps accessible, like screen readers.";
-
-class TooltipDemo extends StatelessWidget {
-
-  static const String routeName = '/tooltips';
-
-  @override
-  Widget build(BuildContext context) {
-    final ThemeData theme = Theme.of(context);
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('Tooltips')
-      ),
-      body: new Builder(
-        builder: (BuildContext context) {
-          return new Block(
-            children: <Widget>[
-              new Text(_introText, style: theme.textTheme.subhead),
-              new Row(
-                children: <Widget>[
-                  new Text('Long press the ', style: theme.textTheme.subhead),
-                  new Tooltip(
-                    message: 'call icon',
-                    child: new Icon(
-                      size: 18.0,
-                      icon: Icons.call,
-                      color: theme.primaryColor
-                    )
-                  ),
-                  new Text(' icon.', style: theme.textTheme.subhead)
-                ]
-              ),
-              new Center(
-                child: new IconButton(
-                  size: 48.0,
-                  icon: Icons.call,
-                  color: theme.primaryColor,
-                  tooltip: 'place a phone call',
-                  onPressed: () {
-                    Scaffold.of(context).showSnackBar(new SnackBar(
-                       content: new Text('That was an ordinary tap.')
-                    ));
-                  }
-                )
-              )
-            ]
-            .map((Widget widget) {
-              return new Padding(
-                padding: const EdgeInsets.only(top: 16.0, left: 16.0, right: 16.0),
-                child: widget
-              );
-            })
-            .toList()
-          );
-        }
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/two_level_list_demo.dart

@@ -1,32 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-
-class TwoLevelListDemo extends StatelessWidget {
-  static const String routeName = '/two-level-list';
-
-  @override
-  Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Expand/collapse list control')),
-      body: new TwoLevelList(
-        type: MaterialListType.oneLine,
-        children: <Widget>[
-          new TwoLevelListItem(title: new Text('Top')),
-          new TwoLevelSublist(
-            title: new Text('Sublist'),
-            children: <Widget>[
-              new TwoLevelListItem(title: new Text('One')),
-              new TwoLevelListItem(title: new Text('Two')),
-              new TwoLevelListItem(title: new Text('Free')),
-              new TwoLevelListItem(title: new Text('Four'))
-            ]
-          ),
-          new TwoLevelListItem(title: new Text('Bottom'))
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/typography_demo.dart

@@ -1,73 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:flutter/widgets.dart';
-
-class TextStyleItem extends StatelessWidget {
-  TextStyleItem({ Key key, this.name, this.style, this.text }) : super(key: key) {
-    assert(name != null);
-    assert(style != null);
-    assert(text != null);
-  }
-
-  final String name;
-  final TextStyle style;
-  final String text;
-
-  @override
-  Widget build(BuildContext context) {
-    final ThemeData theme = Theme.of(context);
-    final TextStyle nameStyle = theme.textTheme.caption.copyWith(color: theme.textTheme.caption.color);
-    return new Padding(
-      padding: const EdgeInsets.symmetric(horizontal: 8.0, vertical: 16.0),
-      child: new Row(
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: <Widget>[
-          new SizedBox(
-            width: 64.0,
-            child: new Text(name, style: nameStyle)
-          ),
-          new Flexible(
-            child: new Text(text, style: style.copyWith(height: 1.0))
-          )
-        ]
-      )
-    );
-  }
-}
-
-class TypographyDemo extends StatelessWidget {
-  static const String routeName = '/typography';
-
-  @override
-  Widget build(BuildContext context) {
-    final TextTheme textTheme = Theme.of(context).textTheme;
-    final List<Widget> styleItems = <Widget>[
-      new TextStyleItem(name: 'Display 3', style: textTheme.display3, text: 'Regular 56sp'),
-      new TextStyleItem(name: 'Display 2', style: textTheme.display2, text: 'Regular 45sp'),
-      new TextStyleItem(name: 'Display 1', style: textTheme.display1, text: 'Regular 34sp'),
-      new TextStyleItem(name: 'Headline', style: textTheme.headline, text: 'Regular 24sp'),
-      new TextStyleItem(name: 'Title', style: textTheme.title, text: 'Medium 20sp'),
-      new TextStyleItem(name: 'Subheading', style: textTheme.subhead, text: 'Regular 16sp'),
-      new TextStyleItem(name: 'Body 2', style: textTheme.body2, text: 'Medium 14sp'),
-      new TextStyleItem(name: 'Body 1', style: textTheme.body1, text: 'Reguluar 14sp'),
-      new TextStyleItem(name: 'Caption', style: textTheme.caption, text: 'Regular 12sp'),
-      new TextStyleItem(name: 'Button', style: textTheme.button, text: 'MEDIUM (ALL CAPS) 14sp')
-    ];
-
-    if (MediaQuery.of(context).size.width > 500.0) {
-      styleItems.insert(0, new TextStyleItem(
-        name: 'Display 4',
-        style: textTheme.display4,
-        text: 'Light 112sp'
-      ));
-    }
-
-    return new Scaffold(
-      appBar: new AppBar(title: new Text('Typography')),
-      body: new Block(children: styleItems)
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/demo/weather_demo.dart

@@ -1,559 +0,0 @@
-// 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:async';
-import 'dart:ui' as ui show Image;
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:flutter_sprites/flutter_sprites.dart';
-
-ImageMap _images;
-SpriteSheet _sprites;
-
-enum WeatherType {
-  sun,
-  rain,
-  snow
-}
-
-class WeatherDemo extends StatefulWidget {
-  WeatherDemo({ Key key }) : super(key: key);
-
-  static const String routeName = '/weather';
-
-  @override
-  _WeatherDemoState createState() => new _WeatherDemoState();
-}
-
-class _WeatherDemoState extends State<WeatherDemo> {
-
-  Future<Null> _loadAssets(AssetBundle bundle) async {
-    _images = new ImageMap(bundle);
-    await _images.load(<String>[
-      'packages/flutter_gallery_assets/clouds-0.png',
-      'packages/flutter_gallery_assets/clouds-1.png',
-      'packages/flutter_gallery_assets/ray.png',
-      'packages/flutter_gallery_assets/sun.png',
-      'packages/flutter_gallery_assets/weathersprites.png',
-      'packages/flutter_gallery_assets/icon-sun.png',
-      'packages/flutter_gallery_assets/icon-rain.png',
-      'packages/flutter_gallery_assets/icon-snow.png'
-    ]);
-
-    String json = await DefaultAssetBundle.of(context).loadString('packages/flutter_gallery_assets/weathersprites.json');
-    _sprites = new SpriteSheet(_images['packages/flutter_gallery_assets/weathersprites.png'], json);
-  }
-
-  @override
-  void initState() {
-    super.initState();
-
-    AssetBundle bundle = DefaultAssetBundle.of(context);
-    _loadAssets(bundle).then((_) {
-      setState(() {
-        assetsLoaded = true;
-        weatherWorld = new WeatherWorld();
-      });
-    });
-  }
-
-  bool assetsLoaded = false;
-
-  WeatherWorld weatherWorld;
-
-  @override
-  Widget build(BuildContext context) {
-    if (!assetsLoaded) {
-      return new Scaffold(
-        appBar: new AppBar(
-          title: new Text('Weather')
-        ),
-        body: new Container(
-          decoration: new BoxDecoration(
-            backgroundColor: const Color(0xff4aaafb)
-          )
-        )
-      );
-    }
-
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('Weather')
-      ),
-      body: new Material(
-        child: new Stack(
-          children: <Widget>[
-            new SpriteWidget(weatherWorld),
-            new Align(
-              alignment: new FractionalOffset(0.5, 0.8),
-              child: new Row(
-                mainAxisAlignment: MainAxisAlignment.center,
-                children: <Widget>[
-                  new WeatherButton(
-                    onPressed: () {
-                      setState(() {
-                        weatherWorld.weatherType = WeatherType.sun;
-                      });
-                    },
-                    selected: weatherWorld.weatherType == WeatherType.sun,
-                    icon: "packages/flutter_gallery_assets/icon-sun.png"
-                  ),
-                  new WeatherButton(
-                    onPressed: () {
-                      setState(() {
-                        weatherWorld.weatherType = WeatherType.rain;
-                      });
-                    },
-                    selected: weatherWorld.weatherType == WeatherType.rain,
-                    icon: "packages/flutter_gallery_assets/icon-rain.png"
-                  ),
-                  new WeatherButton(
-                    onPressed: () {
-                      setState(() {
-                        weatherWorld.weatherType = WeatherType.snow;
-                      });
-                    },
-                    selected: weatherWorld.weatherType == WeatherType.snow,
-                    icon: "packages/flutter_gallery_assets/icon-snow.png"
-                  )
-                ]
-              )
-            )
-          ]
-        )
-      )
-    );
-  }
-}
-
-const double _kWeatherButtonSize = 56.0;
-const double _kWeatherIconSize = 36.0;
-
-class WeatherButton extends StatelessWidget {
-  WeatherButton({ this.icon, this.selected, this.onPressed, Key key }) : super(key: key);
-
-  final String icon;
-  final bool selected;
-  final VoidCallback onPressed;
-
-  @override
-  Widget build(BuildContext context) {
-    Color color;
-    if (selected)
-      color = Theme.of(context).primaryColor;
-    else
-      color = const Color(0x33000000);
-
-    return new Padding(
-      padding: const EdgeInsets.all(15.0),
-      child: new Material(
-        color: color,
-        type: MaterialType.circle,
-        elevation: 0,
-        child: new Container(
-          width: _kWeatherButtonSize,
-          height: _kWeatherButtonSize,
-          child: new InkWell(
-            onTap: onPressed,
-            child: new Center(
-              child: new AssetImage(
-                name: icon,
-                width: _kWeatherIconSize,
-                height: _kWeatherIconSize
-              )
-            )
-          )
-        )
-      )
-    );
-  }
-}
-
-const List<Color> _kBackgroundColorsTop = const <Color>[
-  const Color(0xff5ebbd5),
-  const Color(0xff0b2734),
-  const Color(0xffcbced7)
-];
-
-const List<Color> _kBackgroundColorsBottom = const <Color>[
-  const Color(0xff4aaafb),
-  const Color(0xff4c5471),
-  const Color(0xffe0e3ec)
-];
-
-class WeatherWorld extends NodeWithSize {
-  WeatherWorld() : super(const Size(2048.0, 2048.0)) {
-    _background = new GradientNode(
-      this.size,
-      _kBackgroundColorsTop[0],
-      _kBackgroundColorsBottom[0]
-    );
-    addChild(_background);
-
-    _cloudsSharp = new CloudLayer(
-      image: _images['packages/flutter_gallery_assets/clouds-0.png'],
-      rotated: false,
-      dark: false,
-      loopTime: 20.0
-    );
-    addChild(_cloudsSharp);
-
-    _cloudsDark = new CloudLayer(
-      image: _images['packages/flutter_gallery_assets/clouds-1.png'],
-      rotated: true,
-      dark: true,
-      loopTime: 40.0
-    );
-    addChild(_cloudsDark);
-
-    _cloudsSoft = new CloudLayer(
-      image: _images['packages/flutter_gallery_assets/clouds-1.png'],
-      rotated: false,
-      dark: false,
-      loopTime: 60.0
-    );
-    addChild(_cloudsSoft);
-
-    _sun = new Sun();
-    _sun.position = const Point(1024.0, 1024.0);
-    _sun.scale = 1.5;
-    addChild(_sun);
-
-    _rain = new Rain();
-    addChild(_rain);
-
-    _snow = new Snow();
-    addChild(_snow);
-  }
-
-  GradientNode _background;
-  CloudLayer _cloudsSharp;
-  CloudLayer _cloudsSoft;
-  CloudLayer _cloudsDark;
-  Sun _sun;
-  Rain _rain;
-  Snow _snow;
-
-  WeatherType get weatherType => _weatherType;
-
-  WeatherType _weatherType = WeatherType.sun;
-
-  void set weatherType(WeatherType weatherType) {
-    if (weatherType == _weatherType)
-      return;
-
-    _weatherType = weatherType;
-
-    // Fade the background
-    _background.actions.stopAll();
-
-    _background.actions.run(new ActionTween(
-      (Color a) => _background.colorTop = a,
-      _background.colorTop,
-      _kBackgroundColorsTop[weatherType.index],
-      1.0
-    ));
-
-    _background.actions.run(new ActionTween(
-      (Color a) => _background.colorBottom = a,
-      _background.colorBottom,
-      _kBackgroundColorsBottom[weatherType.index],
-      1.0
-    ));
-
-    _cloudsDark.active = weatherType != WeatherType.sun;
-    _sun.active = weatherType == WeatherType.sun;
-    _rain.active = weatherType == WeatherType.rain;
-    _snow.active = weatherType == WeatherType.snow;
-  }
-
-  @override
-  void spriteBoxPerformedLayout() {
-    _sun.position = spriteBox.visibleArea.topLeft + const Offset(350.0, 180.0);
-  }
-}
-
-class GradientNode extends NodeWithSize {
-  GradientNode(Size size, this.colorTop, this.colorBottom) : super(size);
-
-  Color colorTop;
-  Color colorBottom;
-
-  @override
-  void paint(Canvas canvas) {
-    applyTransformForPivot(canvas);
-
-    Rect rect = Point.origin & size;
-    Paint gradientPaint = new Paint()..shader = new LinearGradient(
-      begin: FractionalOffset.topLeft,
-      end: FractionalOffset.bottomLeft,
-      colors: <Color>[colorTop, colorBottom],
-      stops: <double>[0.0, 1.0]
-    ).createShader(rect);
-
-    canvas.drawRect(rect, gradientPaint);
-  }
-}
-
-class CloudLayer extends Node {
-  CloudLayer({ ui.Image image, bool dark, bool rotated, double loopTime }) {
-    _sprites.add(_createSprite(image, dark, rotated));
-    _sprites[0].position = const Point(1024.0, 1024.0);
-    addChild(_sprites[0]);
-
-    _sprites.add(_createSprite(image, dark, rotated));
-    _sprites[1].position = const Point(3072.0, 1024.0);
-    addChild(_sprites[1]);
-
-    actions.run(new ActionRepeatForever(
-      new ActionTween(
-        (Point a) => position = a,
-        Point.origin,
-        const Point(-2048.0, 0.0),
-        loopTime)
-    ));
-  }
-
-  List<Sprite> _sprites = <Sprite>[];
-
-  Sprite _createSprite(ui.Image image, bool dark, bool rotated) {
-    Sprite sprite = new Sprite.fromImage(image);
-
-    if (rotated)
-      sprite.scaleX = -1.0;
-
-    if (dark) {
-      sprite.colorOverlay = const Color(0xff000000);
-      sprite.opacity = 0.0;
-    }
-
-    return sprite;
-  }
-
-  void set active(bool active) {
-    double opacity;
-    if (active) opacity = 1.0;
-    else opacity = 0.0;
-
-    for (Sprite sprite in _sprites) {
-      sprite.actions.stopAll();
-      sprite.actions.run(new ActionTween(
-        (double a) => sprite.opacity = a,
-        sprite.opacity,
-        opacity,
-        1.0
-      ));
-    }
-  }
-}
-
-const double _kNumSunRays = 50.0;
-
-class Sun extends Node {
-  Sun() {
-    _sun = new Sprite.fromImage(_images['packages/flutter_gallery_assets/sun.png']);
-    _sun.scale = 4.0;
-    _sun.transferMode = TransferMode.plus;
-    addChild(_sun);
-
-    _rays = <Ray>[];
-    for (int i = 0; i < _kNumSunRays; i += 1) {
-      Ray ray = new Ray();
-      addChild(ray);
-      _rays.add(ray);
-    }
-  }
-
-  Sprite _sun;
-  List<Ray> _rays;
-
-  void set active(bool active) {
-    actions.stopAll();
-
-    double targetOpacity;
-    if (!active) targetOpacity = 0.0;
-    else targetOpacity = 1.0;
-
-    actions.run(
-      new ActionTween(
-        (double a) => _sun.opacity = a,
-        _sun.opacity,
-        targetOpacity,
-        2.0
-      )
-    );
-
-    if (active) {
-      for (Ray ray in _rays) {
-        actions.run(new ActionSequence(<Action>[
-          new ActionDelay(1.5),
-          new ActionTween(
-            (double a) => ray.opacity = a,
-            ray.opacity,
-            ray.maxOpacity,
-            1.5
-          )
-        ]));
-      }
-    } else {
-      for (Ray ray in _rays) {
-        actions.run(new ActionTween(
-          (double a) => ray.opacity = a,
-          ray.opacity,
-          0.0,
-          0.2
-        ));
-      }
-    }
-  }
-}
-
-class Ray extends Sprite {
-  double _rotationSpeed;
-  double maxOpacity;
-
-  Ray() : super.fromImage(_images['packages/flutter_gallery_assets/ray.png']) {
-    pivot = const Point(0.0, 0.5);
-    transferMode = TransferMode.plus;
-    rotation = randomDouble() * 360.0;
-    maxOpacity = randomDouble() * 0.2;
-    opacity = maxOpacity;
-    scaleX = 2.5 + randomDouble();
-    scaleY = 0.3;
-    _rotationSpeed = randomSignedDouble() * 2.0;
-
-    // Scale animation
-    double scaleTime = randomSignedDouble() * 2.0 + 4.0;
-
-    actions.run(new ActionRepeatForever(
-      new ActionSequence(<Action>[
-        new ActionTween((double a) => scaleX = a, scaleX, scaleX * 0.5, scaleTime),
-        new ActionTween((double a) => scaleX = a, scaleX * 0.5, scaleX, scaleTime)
-      ])
-    ));
-  }
-
-  @override
-  void update(double dt) {
-    rotation += dt * _rotationSpeed;
-  }
-}
-
-class Rain extends Node {
-  Rain() {
-    _addParticles(1.0);
-    _addParticles(1.5);
-    _addParticles(2.0);
-  }
-
-  List<ParticleSystem> _particles = <ParticleSystem>[];
-
-  void _addParticles(double distance) {
-    ParticleSystem particles = new ParticleSystem(
-      _sprites['raindrop.png'],
-      transferMode: TransferMode.srcATop,
-      posVar: const Point(1300.0, 0.0),
-      direction: 90.0,
-      directionVar: 0.0,
-      speed: 1000.0 / distance,
-      speedVar: 100.0 / distance,
-      startSize: 1.2 / distance,
-      startSizeVar: 0.2 / distance,
-      endSize: 1.2 / distance,
-      endSizeVar: 0.2 / distance,
-      life: 1.5 * distance,
-      lifeVar: 1.0 * distance
-    );
-    particles.position = const Point(1024.0, -200.0);
-    particles.rotation = 10.0;
-    particles.opacity = 0.0;
-
-    _particles.add(particles);
-    addChild(particles);
-  }
-
-  void set active(bool active) {
-    actions.stopAll();
-    for (ParticleSystem system in _particles) {
-      if (active) {
-        actions.run(
-          new ActionTween(
-            (double a) => system.opacity = a,
-            system.opacity,
-            1.0,
-            2.0
-        ));
-      } else {
-        actions.run(
-          new ActionTween(
-            (double a) => system.opacity = a,
-            system.opacity,
-            0.0,
-            0.5
-        ));
-      }
-    }
-  }
-}
-
-class Snow extends Node {
-  Snow() {
-    _addParticles(_sprites['flake-0.png'], 1.0);
-    _addParticles(_sprites['flake-1.png'], 1.0);
-    _addParticles(_sprites['flake-2.png'], 1.0);
-
-    _addParticles(_sprites['flake-3.png'], 1.5);
-    _addParticles(_sprites['flake-4.png'], 1.5);
-    _addParticles(_sprites['flake-5.png'], 1.5);
-
-    _addParticles(_sprites['flake-6.png'], 2.0);
-    _addParticles(_sprites['flake-7.png'], 2.0);
-    _addParticles(_sprites['flake-8.png'], 2.0);
-  }
-
-  List<ParticleSystem> _particles = <ParticleSystem>[];
-
-  void _addParticles(Texture texture, double distance) {
-    ParticleSystem particles = new ParticleSystem(
-      texture,
-      transferMode: TransferMode.srcATop,
-      posVar: const Point(1300.0, 0.0),
-      direction: 90.0,
-      directionVar: 0.0,
-      speed: 150.0 / distance,
-      speedVar: 50.0 / distance,
-      startSize: 1.0 / distance,
-      startSizeVar: 0.3 / distance,
-      endSize: 1.2 / distance,
-      endSizeVar: 0.2 / distance,
-      life: 20.0 * distance,
-      lifeVar: 10.0 * distance,
-      emissionRate: 2.0,
-      startRotationVar: 360.0,
-      endRotationVar: 360.0,
-      radialAccelerationVar: 10.0 / distance,
-      tangentialAccelerationVar: 10.0 / distance
-    );
-    particles.position = const Point(1024.0, -50.0);
-    particles.opacity = 0.0;
-
-    _particles.add(particles);
-    addChild(particles);
-  }
-
-  void set active(bool active) {
-    actions.stopAll();
-    for (ParticleSystem system in _particles) {
-      if (active) {
-        actions.run(
-          new ActionTween((double a) => system.opacity = a, system.opacity, 1.0, 2.0
-        ));
-      } else {
-        actions.run(
-          new ActionTween((double a) => system.opacity = a, system.opacity, 0.0, 0.5
-        ));
-      }
-    }
-  }
-}

examples/flutter_gallery/material_gallery/lib/gallery/app.dart

@@ -1,85 +0,0 @@
-// 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:flutter/material.dart';
-import 'package:flutter/scheduler.dart' show timeDilation;
-
-import '../demo/all.dart';
-import 'home.dart';
-
-final Map<String, WidgetBuilder> kRoutes = <String, WidgetBuilder>{
-  WeatherDemo.routeName: (BuildContext context) => new WeatherDemo(),
-  FitnessDemo.routeName: (BuildContext context) => new FitnessDemo(),
-  DrawingDemo.routeName: (BuildContext context) => new DrawingDemo(),
-  FlexibleSpaceDemo.routeName: (BuildContext context) => new FlexibleSpaceDemo(),
-  TabsFabDemo.routeName: (BuildContext context) => new TabsFabDemo(),
-  ButtonsDemo.routeName: (BuildContext context) => new ButtonsDemo(),
-  CardsDemo.routeName: (BuildContext context) => new CardsDemo(),
-  ChipDemo.routeName: (BuildContext context) => new ChipDemo(),
-  DatePickerDemo.routeName: (BuildContext context) => new DatePickerDemo(),
-  DataTableDemo.routeName: (BuildContext context) => new DataTableDemo(),
-  DialogDemo.routeName: (BuildContext context) => new DialogDemo(),
-  DropDownDemo.routeName: (BuildContext context) => new DropDownDemo(),
-  TwoLevelListDemo.routeName: (BuildContext context) => new TwoLevelListDemo(),
-  GridListDemo.routeName: (BuildContext context) => new GridListDemo(),
-  IconsDemo.routeName: (BuildContext context) => new IconsDemo(),
-  LeaveBehindDemo.routeName: (BuildContext context) => new LeaveBehindDemo(),
-  ListDemo.routeName: (BuildContext context) => new ListDemo(),
-  MenuDemo.routeName: (BuildContext context) => new MenuDemo(),
-  ModalBottomSheetDemo.routeName: (BuildContext context) => new ModalBottomSheetDemo(),
-  OverscrollDemo.routeName: (BuildContext context) => new OverscrollDemo(),
-  PageSelectorDemo.routeName: (BuildContext context) => new PageSelectorDemo(),
-  PersistentBottomSheetDemo.routeName: (BuildContext context) => new PersistentBottomSheetDemo(),
-  ProgressIndicatorDemo.routeName: (BuildContext context) => new ProgressIndicatorDemo(),
-  ScrollableTabsDemo.routeName: (BuildContext context) => new ScrollableTabsDemo(),
-  SelectionControlsDemo.routeName: (BuildContext context) => new SelectionControlsDemo(),
-  SliderDemo.routeName: (BuildContext context) => new SliderDemo(),
-  SnackBarDemo.routeName: (BuildContext context) => new SnackBarDemo(),
-  TabsDemo.routeName: (BuildContext context) => new TabsDemo(),
-  TextFieldDemo.routeName: (BuildContext context) => new TextFieldDemo(),
-  TimePickerDemo.routeName: (BuildContext context) => new TimePickerDemo(),
-  TooltipDemo.routeName: (BuildContext context) => new TooltipDemo(),
-  ColorsDemo.routeName: (BuildContext context) => new ColorsDemo(),
-  TypographyDemo.routeName: (BuildContext context) => new TypographyDemo(),
-};
-
-final ThemeData _kGalleryLightTheme = new ThemeData(
-  brightness: ThemeBrightness.light,
-  primarySwatch: Colors.purple
-);
-
-final ThemeData _kGalleryDarkTheme = new ThemeData(
-  brightness: ThemeBrightness.dark,
-  primarySwatch: Colors.purple
-);
-
-class GalleryApp extends StatefulWidget {
-  GalleryApp({ Key key }) : super(key: key);
-
-  @override
-  GalleryAppState createState() => new GalleryAppState();
-}
-
-class GalleryAppState extends State<GalleryApp> {
-  bool _useLightTheme = true;
-  bool _showPerformanceOverlay = false;
-
-  @override
-  Widget build(BuildContext context) {
-    return new MaterialApp(
-      title: 'Flutter Gallery',
-      theme: _useLightTheme ? _kGalleryLightTheme : _kGalleryDarkTheme,
-      showPerformanceOverlay: _showPerformanceOverlay,
-      routes: kRoutes,
-      home: new GalleryHome(
-        useLightTheme: _useLightTheme,
-        onThemeChanged: (bool value) { setState(() { _useLightTheme = value; }); },
-        showPerformanceOverlay: _showPerformanceOverlay,
-        onShowPerformanceOverlayChanged: (bool value) { setState(() { _showPerformanceOverlay = value; }); },
-        timeDilation: timeDilation,
-        onTimeDilationChanged: (double value) { setState(() { timeDilation = value; }); }
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/gallery/demo.dart

@@ -1,278 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:flutter_markdown/flutter_markdown.dart';
-
-import 'example_code_parser.dart';
-import 'syntax_highlighter.dart';
-
-class SingleComponentDemoData {
-  SingleComponentDemoData({
-    this.widget,
-    this.exampleCodeTag,
-    this.description,
-    this.onPressedDemo
-  });
-
-  final Widget widget;
-  final String exampleCodeTag;
-  final String description;
-  final VoidCallback onPressedDemo;
-}
-
-class ComponentDemoTabData extends SingleComponentDemoData {
-  ComponentDemoTabData({
-    Widget widget,
-    String exampleCodeTag,
-    String description,
-    VoidCallback onPressedDemo,
-    this.tabName
-  }) : super(
-    widget: widget,
-    exampleCodeTag: exampleCodeTag,
-    description: description,
-    onPressedDemo: onPressedDemo
-  );
-
-  final String tabName;
-
-  static Map<ComponentDemoTabData, TabLabel> buildTabLabels(List<ComponentDemoTabData> demos) {
-    return new Map<ComponentDemoTabData, TabLabel>.fromIterable(
-      demos,
-      value: (ComponentDemoTabData demo) => new TabLabel(text: demo.tabName)
-    );
-  }
-
-  @override
-  bool operator==(Object other) {
-    if (other.runtimeType != runtimeType)
-      return false;
-    ComponentDemoTabData typedOther = other;
-    return typedOther.tabName == tabName && typedOther.description == description;
-  }
-
-  @override
-  int get hashCode => hashValues(tabName.hashCode, description.hashCode);
-}
-
-class TabbedComponentDemoScaffold extends StatelessWidget {
-  TabbedComponentDemoScaffold({
-    this.title,
-    this.demos
-  });
-
-  final List<ComponentDemoTabData> demos;
-  final String title;
-
-  @override
-  Widget build(BuildContext context) {
-    return new TabBarSelection<ComponentDemoTabData>(
-      values: demos,
-      child: new Scaffold(
-        appBar: new AppBar(
-          title: new Text(title),
-          tabBar: new TabBar<ComponentDemoTabData>(
-            isScrollable: true,
-            labels: ComponentDemoTabData.buildTabLabels(demos)
-          )
-        ),
-        body: new TabbedComponentDemo(demos)
-      )
-    );
-  }
-}
-
-class TabbedComponentDemo extends StatelessWidget {
-  TabbedComponentDemo(this.demos);
-
-  final List<ComponentDemoTabData> demos;
-
-  @override
-  Widget build(BuildContext context) {
-    return new TabBarView<ComponentDemoTabData>(
-      children: demos.map(buildTabView).toList()
-    );
-  }
-
-  Widget buildTabView(ComponentDemoTabData demo) {
-    return new SingleComponentDemo(demo);
-  }
-}
-
-class SingleComponentDemo extends StatelessWidget {
-  SingleComponentDemo(this.demo);
-
-  final SingleComponentDemoData demo;
-
-  @override
-  Widget build(BuildContext context) {
-    return new Column(
-      children: <Widget>[
-        new Padding(
-          padding: new EdgeInsets.all(16.0),
-          child: new MarkdownBody(data: demo.description)
-        ),
-        new Flexible(
-          child: demo.widget
-        ),
-        new DemoBottomBar(
-          exampleCodeTag: demo.exampleCodeTag,
-          onPressedDemo: demo.onPressedDemo
-        )
-      ]
-    );
-  }
-}
-
-class DemoBottomBar extends StatelessWidget {
-  DemoBottomBar({ this.exampleCodeTag, this.onPressedDemo });
-
-  final String exampleCodeTag;
-  final VoidCallback onPressedDemo;
-
-  @override
-  Widget build(BuildContext context) {
-    VoidCallback onPressedCode;
-    if (exampleCodeTag != null) {
-      onPressedCode = () {
-        Navigator.push(context, new MaterialPageRoute<FullScreenCodeDialog>(
-          builder: (BuildContext context) => new FullScreenCodeDialog(exampleCodeTag: exampleCodeTag)
-        ));
-      };
-    }
-
-    return new Column(
-      children: <Widget>[
-        new Divider(
-          height: 1.0
-        ),
-        new Container(
-          height: 48.0,
-          child: new Row(
-            mainAxisAlignment: MainAxisAlignment.center,
-            children: <Widget>[
-              new FlatButton(
-                child: new Row(
-                  children: <Widget>[
-                    new Padding(
-                      padding: new EdgeInsets.only(right: 8.0),
-                      child: new Icon(icon: Icons.code)
-                    ),
-                    new Text('VIEW CODE')
-                  ]
-                ),
-                onPressed: onPressedCode
-              ),
-              new FlatButton(
-                child: new Row(
-                  children: <Widget>[
-                    new Padding(
-                      padding: new EdgeInsets.only(right: 8.0),
-                      child: new Icon(icon: Icons.star)
-                    ),
-                    new Text('LIVE DEMO')
-                  ]
-                ),
-                onPressed: onPressedDemo
-              )
-            ]
-          )
-        )
-      ]
-    );
-  }
-}
-
-class FormattedCode extends StatefulWidget {
-  FormattedCode(this.exampleCode);
-
-  final String exampleCode;
-
-  @override
-  _FormattedCodeState createState() => new _FormattedCodeState();
-}
-
-class _FormattedCodeState extends State<FormattedCode> {
-  @override
-  void initState() {
-    super.initState();
-    _formatText();
-  }
-
-  TextSpan _formattedText;
-
-  @override
-  Widget build(BuildContext context) {
-    return new RichText(text: _formattedText);
-  }
-
-  @override
-  void didUpdateConfig(FormattedCode oldConfig) {
-    super.didUpdateConfig(oldConfig);
-
-    if (oldConfig.exampleCode != config.exampleCode)
-      _formatText();
-  }
-
-  void _formatText() {
-    _formattedText = new TextSpan(
-      style: new TextStyle(fontFamily: 'monospace', fontSize: 10.0),
-      children: <TextSpan>[new DartSyntaxHighlighter().format(config.exampleCode)]
-    );
-  }
-}
-
-class FullScreenCodeDialog extends StatefulWidget {
-  FullScreenCodeDialog({ this.exampleCodeTag });
-
-  final String exampleCodeTag;
-
-  @override
-  FullScreenCodeDialogState createState() => new FullScreenCodeDialogState();
-}
-
-class FullScreenCodeDialogState extends State<FullScreenCodeDialog> {
-
-  String _exampleCode;
-
-  @override
-  void initState() {
-    super.initState();
-
-    getExampleCode(config.exampleCodeTag, DefaultAssetBundle.of(context)).then((String code) {
-      setState(() {
-        _exampleCode = code;
-      });
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    Widget body;
-    if (_exampleCode == null) {
-      body = new Center(
-        child: new CircularProgressIndicator()
-      );
-    } else {
-      body = new ScrollableViewport(
-        child: new Padding(
-          padding: new EdgeInsets.all(16.0),
-          child: new FormattedCode(_exampleCode)
-        )
-      );
-    }
-
-    return new Scaffold(
-      appBar: new AppBar(
-        leading: new IconButton(
-          icon: Icons.clear,
-          onPressed: () { Navigator.pop(context); }
-        ),
-        title: new Text('Example code')
-      ),
-      body: body
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/gallery/drawer.dart

@@ -1,99 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-
-class GalleryDrawer extends StatelessWidget {
-  GalleryDrawer({
-    Key key,
-    this.useLightTheme,
-    this.onThemeChanged,
-    this.timeDilation,
-    this.onTimeDilationChanged,
-    this.showPerformanceOverlay,
-    this.onShowPerformanceOverlayChanged
-  }) : super(key: key) {
-    assert(onThemeChanged != null);
-    assert(onTimeDilationChanged != null);
-  }
-
-  final bool useLightTheme;
-  final ValueChanged<bool> onThemeChanged;
-
-  final double timeDilation;
-  final ValueChanged<double> onTimeDilationChanged;
-
-  final bool showPerformanceOverlay;
-  final ValueChanged<bool> onShowPerformanceOverlayChanged;
-
-  @override
-  Widget build(BuildContext context) {
-    return new Drawer(
-      child: new Block(
-        children: <Widget>[
-          new DrawerHeader(child: new Text('Flutter gallery')),
-          new DrawerItem(
-            icon: Icons.brightness_5,
-            onPressed: () { onThemeChanged(true); },
-            selected: useLightTheme,
-            child: new Row(
-              children: <Widget>[
-                new Flexible(child: new Text('Light')),
-                new Radio<bool>(
-                  value: true,
-                  groupValue: useLightTheme,
-                  onChanged: onThemeChanged
-                )
-              ]
-            )
-          ),
-          new DrawerItem(
-            icon: Icons.brightness_7,
-            onPressed: () { onThemeChanged(false); },
-            selected: useLightTheme,
-            child: new Row(
-              children: <Widget>[
-                new Flexible(child: new Text('Dark')),
-                new Radio<bool>(
-                  value: false,
-                  groupValue: useLightTheme,
-                  onChanged: onThemeChanged
-                )
-              ]
-            )
-          ),
-          new Divider(),
-          new DrawerItem(
-            icon: Icons.hourglass_empty,
-            selected: timeDilation != 1.0,
-            onPressed: () { onTimeDilationChanged(timeDilation != 1.0 ? 1.0 : 20.0); },
-            child: new Row(
-              children: <Widget>[
-                new Flexible(child: new Text('Animate Slowly')),
-                new Checkbox(
-                  value: timeDilation != 1.0,
-                  onChanged: (bool value) { onTimeDilationChanged(value ? 20.0 : 1.0); }
-                )
-              ]
-            )
-          ),
-          new DrawerItem(
-            icon: Icons.assessment,
-            onPressed: () { onShowPerformanceOverlayChanged(!showPerformanceOverlay); },
-            selected: showPerformanceOverlay,
-            child: new Row(
-              children: <Widget>[
-                new Flexible(child: new Text('Performance Overlay')),
-                new Checkbox(
-                  value: showPerformanceOverlay,
-                  onChanged: (bool value) { onShowPerformanceOverlayChanged(!showPerformanceOverlay); }
-                )
-              ]
-            )
-          ),
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/gallery/example_code.dart

@@ -1,230 +0,0 @@
-// Copyright 2016 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.
-
-// Note: This code is not runnable, it contains code snippets displayed in the
-// gallery.
-
-import 'package:flutter/material.dart';
-
-class ButtonsDemo {
-  void setState(VoidCallback callback) { }
-  BuildContext context;
-
-  void buttons() {
-
-// START buttons_raised
-// Create a raised button.
-new RaisedButton(
-  child: new Text('BUTTON TITLE'),
-  onPressed: () {
-    // Perform some action
-  }
-);
-
-// Create a disabled button.
-// Buttons are disabled when onPressed isn't
-// specified or is null.
-new RaisedButton(
-  child: new Text('BUTTON TITLE')
-);
-// END
-
-
-// START buttons_flat
-// Create a flat button.
-new FlatButton(
-  child: new Text('BUTTON TITLE'),
-  onPressed: () {
-    // Perform some action
-  }
-);
-
-// Create a disabled button.
-// Buttons are disabled when onPressed isn't
-// specified or is null.
-new FlatButton(
-  child: new Text('BUTTON TITLE')
-);
-// END
-
-
-// START buttons_dropdown
-// Member variable holding value.
-String dropdownValue;
-
-// Drop down button with string values.
-new DropDownButton<String>(
-  value: dropdownValue,
-  onChanged: (String newValue) {
-    // null indicates the user didn't select a
-    // new value.
-    setState(() {
-      if (newValue != null)
-        dropdownValue = newValue;
-    });
-  },
-  items: <String>['One', 'Two', 'Free', 'Four']
-    .map((String value) {
-      return new DropDownMenuItem<String>(
-        value: value,
-        child: new Text(value));
-    })
-    .toList()
-);
-// END
-
-
-// START buttons_icon
-// Member variable holding toggle value.
-bool value;
-
-// Toggleable icon button.
-new IconButton(
-  icon: Icons.thumb_up,
-  onPressed: () {
-    setState(() => value = !value);
-  },
-  color: value ? Theme.of(context).primaryColor : null
-);
-// END
-
-
-// START buttons_action
-// Floating action button in Scaffold.
-new Scaffold(
-  appBar: new AppBar(
-    title: new Text('Demo')
-  ),
-  floatingActionButton: new FloatingActionButton(
-    child: new Icon(icon: Icons.add)
-  )
-);
-// END
-  }
-}
-
-
-class SelectionControls {
-  void setState(VoidCallback callback) { }
-
-  void selectionControls() {
-
-// START selectioncontrols_checkbox
-// Member variable holding the checkbox's value.
-bool checkboxValue = false;
-
-// Create a checkbox.
-new Checkbox(
-  value: checkboxValue,
-  onChanged: (bool value) {
-    setState(() {
-      checkboxValue = value;
-    }
-  );
-});
-
-// Create a disabled checkbox.
-// Checkboxes are disabled when onChanged isn't
-// specified or null.
-new Checkbox(value: false);
-// END
-
-
-// START selectioncontrols_radio
-// Member variable holding value.
-int radioValue = 0;
-
-// Method setting value.
-void handleRadioValueChanged(int value) {
-  setState(() {
-    radioValue = value;
-  });
-}
-
-// Creates a set of radio buttons.
-new Row(
-  children: <Widget>[
-    new Radio<int>(
-      value: 0,
-      groupValue: radioValue,
-      onChanged: handleRadioValueChanged
-    ),
-    new Radio<int>(
-      value: 1,
-      groupValue: radioValue,
-      onChanged: handleRadioValueChanged
-    ),
-    new Radio<int>(
-      value: 2,
-      groupValue: radioValue,
-      onChanged: handleRadioValueChanged
-    )
-  ]
-);
-
-// Creates a disabled radio button.
-new Radio<int>(
-  value: 0,
-  groupValue: 0
-);
-// END
-
-
-// START selectioncontrols_switch
-// Member variable holding value.
-bool switchValue = false;
-
-// Create a switch.
-new Switch(
-  value: switchValue,
-  onChanged: (bool value) {
-    setState(() {
-      switchValue = value;
-    }
-  );
-});
-
-// Create a disabled switch.
-// Switches are disabled when onChanged isn't
-// specified or null.
-new Switch(value: false);
-// END
-  }
-}
-
-
-class GridLists {
-  void gridlists() {
-// START gridlists
-// Creates a scrollable grid list with images
-// loaded from the web.
-new ScrollableGrid(
-  delegate: new FixedColumnCountGridDelegate(
-    columnCount: 3,
-    tileAspectRatio: 1.0,
-    padding: const EdgeInsets.all(4.0),
-    columnSpacing: 4.0,
-    rowSpacing: 4.0
-  ),
-  children: <String>[
-    'https://example.com/image-0.jpg',
-    'https://example.com/image-1.jpg',
-    'https://example.com/image-2.jpg',
-    '...',
-    'https://example.com/image-n.jpg'
-  ].map((String url) {
-    return new GridTile(
-      footer: new GridTileBar(
-        title: new Text(url)
-      ),
-      child: new NetworkImage(
-        src: url,
-        fit: ImageFit.cover
-      )
-    );
-  })
-);
-// END
-  }
-}

examples/flutter_gallery/material_gallery/lib/gallery/example_code_parser.dart

@@ -1,52 +0,0 @@
-// Copyright 2016 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:async';
-
-import 'package:flutter/services.dart';
-
-const String _kStartTag = '// START ';
-const String _kEndTag = '// END';
-
-Map<String, String> _exampleCode;
-
-Future<String> getExampleCode(String tag, AssetBundle bundle) async {
-  if (_exampleCode == null)
-    await _parseExampleCode(bundle);
-  return _exampleCode[tag];
-}
-
-Future<Null> _parseExampleCode(AssetBundle bundle) async {
-  final String code = await bundle.loadString('lib/gallery/example_code.dart');
-  _exampleCode = <String, String>{};
-
-  final List<String> lines = code.split('\n');
-
-  List<String> codeBlock;
-  String codeTag;
-
-  for (String line in lines) {
-    if (codeBlock == null) {
-      // Outside a block.
-      if (line.startsWith(_kStartTag)) {
-        // Starting a new code block.
-        codeBlock = <String>[];
-        codeTag = line.substring(_kStartTag.length);
-      } else {
-        // Just skipping the line.
-      }
-    } else {
-      // Inside a block.
-      if (line.startsWith(_kEndTag)) {
-        // Add the block.
-        _exampleCode[codeTag] = codeBlock.join('\n');
-        codeBlock = null;
-        codeTag = null;
-      } else {
-        // Add to the current block
-        codeBlock.add(line);
-      }
-    }
-  }
-}

examples/flutter_gallery/material_gallery/lib/gallery/header.dart

@@ -1,198 +0,0 @@
-// Copyright 2016 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:async';
-
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:flutter_sprites/flutter_sprites.dart';
-
-class GalleryHeader extends StatefulWidget {
-  @override
-  _GalleryHeaderState createState() => new _GalleryHeaderState();
-}
-
-class _GalleryHeaderState extends State<GalleryHeader> {
-  _FlutterHeaderNode _headerNode;
-  ImageMap _images;
-
-  Future<Null> _loadAssets() async {
-    final AssetBundle bundle = DefaultAssetBundle.of(context);
-    _images = new ImageMap(bundle);
-    await _images.load(<String>[
-      'packages/flutter_gallery_assets/grain.png',
-      'packages/flutter_gallery_assets/shadow.png',
-    ]);
-  }
-
-  @override
-  void initState() {
-    super.initState();
-    _loadAssets().then((_) {
-      setState(() {
-        _headerNode = new _FlutterHeaderNode(_images);
-      });
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return _headerNode == null ? new Container() : new SpriteWidget(_headerNode);
-  }
-}
-
-const Size _kCanvasSize = const Size(1024.0, 1024.0);
-const Point _kCenterPoint = const Point(512.0, 512.0);
-
-class _FlutterHeaderNode extends NodeWithSize {
-  _FlutterHeaderNode(this._images) : super(_kCanvasSize) {
-    clippingLayer.opacity = 0.0;
-    clippingLayer.actions.run(new ActionTween((double a) => clippingLayer.opacity = a, 0.0, 1.0, 0.5));
-    addChild(clippingLayer);
-
-    clippingLayer.addChild(new _BackgroundBox());
-
-    paperAnimation = new _PaperAnimation(_images);
-    paperAnimation.position = _kCenterPoint;
-    clippingLayer.addChild(paperAnimation);
-
-    final Sprite grain = new Sprite.fromImage(_images['packages/flutter_gallery_assets/grain.png'])
-      ..position = _kCenterPoint;
-    clippingLayer.addChild(grain);
-
-    userInteractionEnabled = true;
-  }
-
-  final ImageMap _images;
-  final Layer clippingLayer = new Layer();
-  _PaperAnimation paperAnimation;
-
-  @override
-  void spriteBoxPerformedLayout() {
-    clippingLayer.layerRect = spriteBox.visibleArea;
-  }
-}
-
-final List<_PaperConfig> _kPaperConfigs = <_PaperConfig>[
-  new _PaperConfig(
-    color: Colors.deepPurple[500],
-    startPosition: const Point(-300.0, -300.0),
-    startRotation: -10.0,
-    rotationSpeed: -1.0,
-    parallaxDepth: 0.0,
-    rect: new Rect.fromLTRB(-1024.0, -280.0, 1024.0, 280.0)
-  ),
-  new _PaperConfig(
-    color: Colors.purple[400],
-    startPosition: const Point(550.0, 0.0),
-    startRotation: 45.0,
-    rotationSpeed: 0.7,
-    parallaxDepth: 1.0,
-    rect: new Rect.fromLTRB(-512.0, -512.0, 512.0, 512.0)
-  ),
-  new _PaperConfig(
-    color: Colors.purple[600],
-    startPosition: const Point(550.0, 0.0),
-    startRotation: 55.0,
-    rotationSpeed: 0.9,
-    parallaxDepth: 2.0,
-    rect: new Rect.fromLTRB(-512.0, -512.0, 512.0, 512.0)
-  ),
-  new _PaperConfig(
-    color: Colors.purple[700],
-    startPosition: const Point(550.0, 0.0),
-    startRotation: 65.0,
-    rotationSpeed: 1.1,
-    parallaxDepth: 3.0,
-    rect: new Rect.fromLTRB(-512.0, -512.0, 512.0, 512.0)
-  )
-];
-
-class _PaperAnimation extends Node {
-  _PaperAnimation(ImageMap images) {
-    for (_PaperConfig config in _kPaperConfigs) {
-
-      final _PaperSheet sheet = new _PaperSheet(config);
-      final _PaperSheetShadow shadow = new _PaperSheetShadow(config, images);
-
-      addChild(shadow);
-      addChild(sheet);
-      _sheets.add(sheet);
-
-      shadow.constraints = <Constraint>[
-        new ConstraintRotationToNodeRotation(sheet),
-        new ConstraintPositionToNode(sheet, offset: const Offset(0.0, 8.0))
-      ];
-    }
-  }
-
-  final List<_PaperSheet> _sheets = <_PaperSheet>[];
-}
-
-class _PaperConfig {
-  _PaperConfig({
-    this.color,
-    this.startPosition,
-    this.startRotation,
-    this.rotationSpeed,
-    this.parallaxDepth,
-    this.rect
-  });
-
-  final Color color;
-  final Point startPosition;
-  final double startRotation;
-  final double rotationSpeed;
-  final double parallaxDepth;
-  final Rect rect;
-}
-
-class _PaperSheet extends Node {
-  _PaperSheet(this._config) {
-    _paperPaint.color = _config.color;
-
-    position = _config.startPosition;
-    rotation = _config.startRotation;
-  }
-
-  final _PaperConfig _config;
-  final Paint _paperPaint = new Paint();
-
-  @override
-  void paint(Canvas canvas) {
-    canvas.drawRect(_config.rect, _paperPaint);
-  }
-
-  @override
-  void update(double dt) {
-    rotation += _config.rotationSpeed * dt;
-  }
-}
-
-class _PaperSheetShadow extends Node {
-  _PaperSheetShadow(this._config, ImageMap images) {
-    NineSliceSprite shadow = new NineSliceSprite.fromImage(
-      images['packages/flutter_gallery_assets/shadow.png'],
-      new Size(
-        _config.rect.size.width + 32.0,
-        _config.rect.size.height + 32.0
-      ),
-      const EdgeInsets.all(0.375)
-    );
-    shadow.drawCenterPart = false;
-    shadow.opacity = 0.5;
-    addChild(shadow);
-  }
-
-  final _PaperConfig _config;
-}
-
-class _BackgroundBox extends Node {
-  final Paint _boxPaint = new Paint()..color = Colors.purple[500];
-
-  @override
-  void paint(Canvas canvas) {
-    canvas.drawRect(new Rect.fromLTWH(0.0, 0.0, _kCanvasSize.width, _kCanvasSize.height), _boxPaint);
-  }
-}

examples/flutter_gallery/material_gallery/lib/gallery/home.dart

@@ -1,127 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:flutter/widgets.dart';
-
-import '../demo/all.dart';
-import 'drawer.dart';
-import 'header.dart';
-import 'item.dart';
-
-const double _kFlexibleSpaceMaxHeight = 256.0;
-
-class GalleryHome extends StatefulWidget {
-  GalleryHome({
-    Key key,
-    this.useLightTheme,
-    this.onThemeChanged,
-    this.timeDilation,
-    this.onTimeDilationChanged,
-    this.showPerformanceOverlay,
-    this.onShowPerformanceOverlayChanged
-  }) : super(key: key) {
-    assert(onThemeChanged != null);
-    assert(onTimeDilationChanged != null);
-    assert(onShowPerformanceOverlayChanged != null);
-  }
-
-  final bool useLightTheme;
-  final ValueChanged<bool> onThemeChanged;
-
-  final double timeDilation;
-  final ValueChanged<double> onTimeDilationChanged;
-
-  final bool showPerformanceOverlay;
-  final ValueChanged<bool> onShowPerformanceOverlayChanged;
-
-  @override
-  GalleryHomeState createState() => new GalleryHomeState();
-}
-
-class GalleryHomeState extends State<GalleryHome> {
-  final Key _homeKey = new ValueKey<String>("Gallery Home");
-
-  @override
-  Widget build(BuildContext context) {
-    final double statusBarHight = (MediaQuery.of(context)?.padding ?? EdgeInsets.zero).top;
-
-    return new Scaffold(
-      key: _homeKey,
-      drawer: new GalleryDrawer(
-        useLightTheme: config.useLightTheme,
-        onThemeChanged: config.onThemeChanged,
-        timeDilation: config.timeDilation,
-        onTimeDilationChanged: config.onTimeDilationChanged,
-        showPerformanceOverlay: config.showPerformanceOverlay,
-        onShowPerformanceOverlayChanged: config.onShowPerformanceOverlayChanged
-      ),
-      appBar: new AppBar(
-        expandedHeight: _kFlexibleSpaceMaxHeight,
-        flexibleSpace: new FlexibleSpaceBar(
-          title: new Text('Flutter gallery'),
-          background: new GalleryHeader()
-        )
-      ),
-      appBarBehavior: AppBarBehavior.under,
-      body: new TwoLevelList(
-        padding: new EdgeInsets.only(top: _kFlexibleSpaceMaxHeight + statusBarHight),
-        type: MaterialListType.oneLine,
-        children: <Widget>[
-          new TwoLevelSublist(
-            leading: new Icon(icon: Icons.star),
-            title: new Text('Demos'),
-            children: <Widget>[
-              new GalleryItem(title: 'Weather', routeName: WeatherDemo.routeName),
-              new GalleryItem(title: 'Fitness', routeName: FitnessDemo.routeName),
-              new GalleryItem(title: 'Fancy lines', routeName: DrawingDemo.routeName),
-              new GalleryItem(title: 'Flexible space toolbar', routeName: FlexibleSpaceDemo.routeName),
-              new GalleryItem(title: 'Floating action button', routeName: TabsFabDemo.routeName),
-            ]
-          ),
-          new TwoLevelSublist(
-            leading: new Icon(icon: Icons.extension),
-            title: new Text('Components'),
-            children: <Widget>[
-              new GalleryItem(title: 'Buttons', routeName: ButtonsDemo.routeName),
-              new GalleryItem(title: 'Cards', routeName: CardsDemo.routeName),
-              new GalleryItem(title: 'Chips', routeName: ChipDemo.routeName),
-              new GalleryItem(title: 'Date picker', routeName: DatePickerDemo.routeName),
-              new GalleryItem(title: 'Data tables', routeName: DataTableDemo.routeName),
-              new GalleryItem(title: 'Dialog', routeName: DialogDemo.routeName),
-              new GalleryItem(title: 'Drop-down button', routeName: DropDownDemo.routeName),
-              new GalleryItem(title: 'Expand/collapse list control', routeName: TwoLevelListDemo.routeName),
-              new GalleryItem(title: 'Grid', routeName: GridListDemo.routeName),
-              new GalleryItem(title: 'Icons', routeName: IconsDemo.routeName),
-              new GalleryItem(title: 'Leave-behind list items', routeName: LeaveBehindDemo.routeName),
-              new GalleryItem(title: 'List', routeName: ListDemo.routeName),
-              new GalleryItem(title: 'Menus', routeName: MenuDemo.routeName),
-              new GalleryItem(title: 'Modal bottom sheet', routeName: ModalBottomSheetDemo.routeName),
-              new GalleryItem(title: 'Over-scroll', routeName: OverscrollDemo.routeName),
-              new GalleryItem(title: 'Page selector', routeName: PageSelectorDemo.routeName),
-              new GalleryItem(title: 'Persistent bottom sheet', routeName: PersistentBottomSheetDemo.routeName),
-              new GalleryItem(title: 'Progress indicators', routeName: ProgressIndicatorDemo.routeName),
-              new GalleryItem(title: 'Scrollable tabs', routeName: ScrollableTabsDemo.routeName),
-              new GalleryItem(title: 'Selection controls', routeName: SelectionControlsDemo.routeName),
-              new GalleryItem(title: 'Sliders', routeName: SliderDemo.routeName),
-              new GalleryItem(title: 'Snackbar', routeName: SnackBarDemo.routeName),
-              new GalleryItem(title: 'Tabs', routeName: TabsDemo.routeName),
-              new GalleryItem(title: 'Text fields', routeName: TextFieldDemo.routeName),
-              new GalleryItem(title: 'Time picker', routeName: TimePickerDemo.routeName),
-              new GalleryItem(title: 'Tooltips', routeName: TooltipDemo.routeName),
-            ]
-          ),
-          new TwoLevelSublist(
-            leading: new Icon(icon: Icons.color_lens),
-            title: new Text('Style'),
-            children: <Widget>[
-              new GalleryItem(title: 'Colors', routeName: ColorsDemo.routeName),
-              new GalleryItem(title: 'Typography', routeName: TypographyDemo.routeName),
-            ]
-          )
-        ]
-      )
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/gallery/item.dart

@@ -1,36 +0,0 @@
-// Copyright 2016 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:developer';
-
-import 'package:flutter/material.dart';
-
-typedef Widget GalleryDemoBuilder();
-
-class GalleryItem extends StatelessWidget {
-  GalleryItem({ this.title, this.icon, this.routeName });
-
-  final String title;
-  final IconData icon;
-  final String routeName;
-
-  @override
-  Widget build(BuildContext context) {
-    Widget leading = icon == null ? new Container() : new Icon(icon: icon);
-
-    return new TwoLevelListItem(
-      leading: leading,
-      title: new Text(title),
-      onTap: () {
-        if (routeName != null) {
-          Timeline.instantSync('Start Transition', arguments: <String, String>{
-            'from': '/',
-            'to': routeName
-          });
-          Navigator.pushNamed(context, routeName);
-        }
-      }
-    );
-  }
-}

examples/flutter_gallery/material_gallery/lib/gallery/syntax_highlighter.dart

@@ -1,345 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:string_scanner/string_scanner.dart';
-
-class SyntaxHighlighterStyle {
-  SyntaxHighlighterStyle({
-    this.baseStyle,
-    this.numberStyle,
-    this.commentStyle,
-    this.keywordStyle,
-    this.stringStyle,
-    this.punctuationStyle,
-    this.classStyle,
-    this.constantStyle
-  });
-
-  static SyntaxHighlighterStyle defaultStyle() {
-    return new SyntaxHighlighterStyle(
-      baseStyle: new TextStyle(color: const Color(0xff000000)),
-      numberStyle: new TextStyle(color: const Color(0xFF1565C0)),
-      commentStyle: new TextStyle(color: const Color(0xFF9E9E9E)),
-      keywordStyle: new TextStyle(color: const Color(0xFF9C27B0)),
-      stringStyle: new TextStyle(color: const Color(0xFF43A047)),
-      punctuationStyle: new TextStyle(color: const Color(0xff000000)),
-      classStyle: new TextStyle(color: const Color(0xFF512DA8)),
-      constantStyle: new TextStyle(color: const Color(0xFF795548))
-    );
-  }
-
-  final TextStyle baseStyle;
-  final TextStyle numberStyle;
-  final TextStyle commentStyle;
-  final TextStyle keywordStyle;
-  final TextStyle stringStyle;
-  final TextStyle punctuationStyle;
-  final TextStyle classStyle;
-  final TextStyle constantStyle;
-}
-
-abstract class SyntaxHighlighter {
-  TextSpan format(String src);
-}
-
-class DartSyntaxHighlighter extends SyntaxHighlighter {
-  DartSyntaxHighlighter([this._style]) {
-    _spans = <_HighlightSpan>[];
-
-    if (_style == null)
-      _style = SyntaxHighlighterStyle.defaultStyle();
-  }
-
-  SyntaxHighlighterStyle _style;
-
-  static const List<String> _kKeywords = const <String>[
-    'abstract', 'as', 'assert', 'async', 'await', 'break', 'case', 'catch',
-    'class', 'const', 'continue', 'default', 'deferred', 'do', 'dynamic', 'else',
-    'enum', 'export', 'external', 'extends', 'factory', 'false', 'final',
-    'finally', 'for', 'get', 'if', 'implements', 'import', 'in', 'is', 'library',
-    'new', 'null', 'operator', 'part', 'rethrow', 'return', 'set', 'static',
-    'super', 'switch', 'sync', 'this', 'throw', 'true', 'try', 'typedef', 'var',
-    'void', 'while', 'with', 'yield'
-  ];
-
-  static const List<String> _kBuiltInTypes = const <String>[
-    'int', 'double', 'num', 'bool'
-  ];
-
-  String _src;
-  StringScanner _scanner;
-
-  List<_HighlightSpan> _spans;
-
-  @override
-  TextSpan format(String src) {
-    _src = src;
-    _scanner = new StringScanner(_src);
-
-    if (_generateSpans()) {
-      // Successfully parsed the code
-      List<TextSpan> formattedText = <TextSpan>[];
-      int currentPosition = 0;
-
-      for (_HighlightSpan span in _spans) {
-        if (currentPosition != span.start)
-          formattedText.add(new TextSpan(text: _src.substring(currentPosition, span.start)));
-
-        formattedText.add(new TextSpan(style: span.textStyle(_style), text: span.textForSpan(_src)));
-
-        currentPosition = span.end;
-      }
-
-      if (currentPosition != _src.length)
-        formattedText.add(new TextSpan(text: _src.substring(currentPosition, _src.length)));
-
-      return new TextSpan(style: _style.baseStyle, children: formattedText);
-    } else {
-      // Parsing failed, return with only basic formatting
-      return new TextSpan(style:_style.baseStyle, text: src);
-    }
-  }
-
-  bool _generateSpans() {
-    int lastLoopPosition = _scanner.position;
-
-    while(!_scanner.isDone) {
-      // Skip White space
-      _scanner.scan(new RegExp(r"\s+"));
-
-      // Block comments
-      if (_scanner.scan(new RegExp(r"/\*(.|\n)*\*/"))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.comment,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // Line comments
-      if (_scanner.scan("//")) {
-        int startComment = _scanner.lastMatch.start;
-
-        bool eof = false;
-        int endComment;
-        if (_scanner.scan(new RegExp(r".*\n"))) {
-          endComment = _scanner.lastMatch.end - 1;
-        } else {
-          eof = true;
-          endComment = _src.length;
-        }
-
-        _spans.add(new _HighlightSpan(
-          _HighlightType.comment,
-          startComment,
-          endComment
-        ));
-
-        if (eof)
-          break;
-
-        continue;
-      }
-
-      // Raw r"String"
-      if (_scanner.scan(new RegExp(r'r".*"'))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.string,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // Raw r'String'
-      if (_scanner.scan(new RegExp(r"r'.*'"))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.string,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // Multiline """String"""
-      if (_scanner.scan(new RegExp(r'"""(?:[^"\\]|\\(.|\n))*"""'))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.string,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // Multiline '''String'''
-      if (_scanner.scan(new RegExp(r"'''(?:[^'\\]|\\(.|\n))*'''"))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.string,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // "String"
-      if (_scanner.scan(new RegExp(r'"(?:[^"\\]|\\.)*"'))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.string,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // 'String'
-      if (_scanner.scan(new RegExp(r"'(?:[^'\\]|\\.)*'"))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.string,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // Double
-      if (_scanner.scan(new RegExp(r"\d+\.\d+"))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.number,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // Integer
-      if (_scanner.scan(new RegExp(r"\d+"))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.number,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end)
-        );
-        continue;
-      }
-
-      // Punctuation
-      if (_scanner.scan(new RegExp(r"[\[\]{}().!=<>&\|\?\+\-\*/%\^~;:,]"))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.punctuation,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // Metadata
-      if (_scanner.scan(new RegExp(r"@\w+"))) {
-        _spans.add(new _HighlightSpan(
-          _HighlightType.keyword,
-          _scanner.lastMatch.start,
-          _scanner.lastMatch.end
-        ));
-        continue;
-      }
-
-      // Words
-      if (_scanner.scan(new RegExp(r"\w+"))) {
-        _HighlightType type;
-
-        String word = _scanner.lastMatch[0];
-        if (word.startsWith("_"))
-          word = word.substring(1);
-
-        if (_kKeywords.contains(word))
-          type = _HighlightType.keyword;
-        else if (_kBuiltInTypes.contains(word))
-          type = _HighlightType.keyword;
-        else if (_firstLetterIsUpperCase(word))
-          type = _HighlightType.klass;
-        else if (word.length >= 2 && word.startsWith("k") && _firstLetterIsUpperCase(word.substring(1)))
-          type = _HighlightType.constant;
-
-        if (type != null) {
-          _spans.add(new _HighlightSpan(
-            type,
-            _scanner.lastMatch.start,
-            _scanner.lastMatch.end
-          ));
-        }
-      }
-
-      // Check if this loop did anything
-      if (lastLoopPosition == _scanner.position) {
-        // Failed to parse this file, abort gracefully
-        return false;
-      }
-      lastLoopPosition = _scanner.position;
-    }
-
-    _simplify();
-    return true;
-  }
-
-  void _simplify() {
-    for(int i = _spans.length - 2; i >= 0; i -= 1) {
-      if (_spans[i].type == _spans[i + 1].type && _spans[i].end == _spans[i + 1].start) {
-        _spans[i] = new _HighlightSpan(
-          _spans[i].type,
-          _spans[i].start,
-          _spans[i + 1].end
-        );
-        _spans.removeAt(i + 1);
-      }
-    }
-  }
-
-  bool _firstLetterIsUpperCase(String str) {
-    if (str.length > 0) {
-      String first = str.substring(0, 1);
-      return first == first.toUpperCase();
-    }
-    return false;
-  }
-}
-
-enum _HighlightType {
-  number,
-  comment,
-  keyword,
-  string,
-  punctuation,
-  klass,
-  constant
-}
-
-class _HighlightSpan {
-  _HighlightSpan(this.type, this.start, this.end);
-  final _HighlightType type;
-  final int start;
-  final int end;
-
-  String textForSpan(String src) {
-    return src.substring(start, end);
-  }
-
-  TextStyle textStyle(SyntaxHighlighterStyle style) {
-    if (type == _HighlightType.number)
-      return style.numberStyle;
-    else if (type == _HighlightType.comment)
-      return style.commentStyle;
-    else if (type == _HighlightType.keyword)
-      return style.keywordStyle;
-    else if (type == _HighlightType.string)
-      return style.stringStyle;
-    else if (type == _HighlightType.punctuation)
-      return style.punctuationStyle;
-    else if (type == _HighlightType.klass)
-      return style.classStyle;
-    else if (type == _HighlightType.constant)
-      return style.constantStyle;
-    else
-      return style.baseStyle;
-  }
-}

examples/flutter_gallery/material_gallery/lib/main.dart

@@ -1,11 +0,0 @@
-// 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:flutter/widgets.dart';
-
-import 'gallery/app.dart';
-
-void main() {
-  runApp(new GalleryApp());
-}

examples/flutter_gallery/material_gallery/pubspec.yaml

@@ -1,20 +0,0 @@
-name: flutter_gallery
-dependencies:
-  intl: '>=0.12.4+2 <0.13.0'
-  collection: '>=1.4.0 <2.0.0'
-  string_scanner: '0.1.4+1'
-
-  flutter:
-    path: ../../packages/flutter
-  flutter_sprites:
-    path: ../../packages/flutter_sprites
-  flutter_markdown:
-    path: ../../packages/flutter_markdown
-  flutter_gallery_assets: '0.0.16'
-
-dev_dependencies:
-  test: any # flutter_test provides the version constraints
-  flutter_test:
-    path: ../../packages/flutter_test
-  flutter_driver:
-    path: ../../packages/flutter_driver

examples/flutter_gallery/material_gallery/test/example_code_parser_test.dart

@@ -1,53 +0,0 @@
-// Copyright 2016 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:async';
-
-import 'package:flutter/services.dart';
-import 'package:flutter_gallery/gallery/example_code_parser.dart';
-import 'package:mojo/core.dart' as core;
-import 'package:test/test.dart';
-
-void main() {
-  test('Flutter gallery example code parser test', () async {
-    TestAssetBundle bundle = new TestAssetBundle();
-
-    String codeSnippet0 = await getExampleCode('test_0', bundle);
-    expect(codeSnippet0, 'test 0 0\ntest 0 1');
-
-    String codeSnippet1 = await getExampleCode('test_1', bundle);
-    expect(codeSnippet1, 'test 1 0\ntest 1 1');
-  });
-}
-
-const String testCodeFile = """// A fake test file
-// START test_0
-test 0 0
-test 0 1
-// END
-
-// Some comments
-// START test_1
-test 1 0
-test 1 1
-// END
-""";
-
-class TestAssetBundle extends AssetBundle {
-  @override
-  ImageResource loadImage(String key) => null;
-
-  @override
-  Future<String> loadString(String key) {
-    if (key == 'lib/gallery/example_code.dart')
-      return new Future<String>.value(testCodeFile);
-    return null;
-  }
-
-  @override
-  Future<core.MojoDataPipeConsumer> load(String key) => null;
-
-  @override
-  String toString() => '$runtimeType@$hashCode()';
-}

examples/flutter_gallery/material_gallery/test/smoke_test.dart

@@ -1,98 +0,0 @@
-// Copyright 2016 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:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-import 'package:flutter_gallery/gallery/app.dart' as flutter_gallery_app;
-import 'package:flutter_gallery/gallery/item.dart' as flutter_gallery_item;
-import 'package:flutter_gallery/main.dart' as flutter_gallery_main;
-import 'package:test/test.dart';
-
-// Warning: the following strings must be kept in sync with GalleryHome.
-const List<String> demoCategories = const <String>['Demos', 'Components', 'Style'];
-
-Finder findGalleryItemByRouteName(WidgetTester tester, String routeName) {
-  return find.byWidgetPredicate((Widget widget) {
-    return widget is flutter_gallery_item.GalleryItem
-        && widget.routeName == routeName;
-  });
-}
-
-Finder byTooltip(WidgetTester tester, String message) {
-  return find.byWidgetPredicate((Widget widget) {
-    return widget is Tooltip && widget.message == message;
-  });
-}
-
-Finder findNavigationMenuButton(WidgetTester tester) => byTooltip(tester, 'Open navigation menu');
-
-Finder findBackButton(WidgetTester tester) => byTooltip(tester, 'Back');
-
-// Start a gallery demo and then go back. This function assumes that the
-// we're starting on home route and that the submenu that contains the demo
-// called 'name' is already open.
-void smokeDemo(WidgetTester tester, String routeName) {
-  // Ensure that we're (likely to be) on the home page
-  final Finder menuItem = findGalleryItemByRouteName(tester, routeName);
-  expect(menuItem, findsOneWidget);
-
-  tester.tap(menuItem);
-  tester.pump(); // Launch the demo.
-  tester.pump(const Duration(seconds: 1)); // Wait until the demo has opened.
-
-  // Go back
-  Finder backButton = findBackButton(tester);
-  expect(backButton, findsOneWidget);
-  tester.tap(backButton);
-  tester.pump(); // Start the navigator pop "back" operation.
-  tester.pump(const Duration(seconds: 1)); // Wait until it has finished.
-}
-
-void main() {
-  testWidgets('Flutter gallery app smoke test', (WidgetTester tester) {
-    flutter_gallery_main.main(); // builds the app and schedules a frame but doesn't trigger one
-    tester.pump(); // see https://github.com/flutter/flutter/issues/1865
-    tester.pump(); // triggers a frame
-
-    // Expand the demo category submenus.
-    for (String category in demoCategories.reversed) {
-      tester.tap(find.text(category));
-      tester.pump();
-      tester.pump(const Duration(seconds: 1)); // Wait until the menu has expanded.
-    }
-
-    final List<double> scrollDeltas = new List<double>();
-    double previousY = tester.getTopRight(find.text(demoCategories[0])).y;
-    final List<String> routeNames = flutter_gallery_app.kRoutes.keys.toList();
-    for (String routeName in routeNames) {
-      final double y = tester.getTopRight(findGalleryItemByRouteName(tester, routeName)).y;
-      scrollDeltas.add(previousY - y);
-      previousY = y;
-    }
-
-    // Launch each demo and then scroll that item out of the way.
-    for (int i = 0; i < routeNames.length; i += 1) {
-      final String routeName = routeNames[i];
-      smokeDemo(tester, routeName);
-      tester.scroll(findGalleryItemByRouteName(tester, routeName), new Offset(0.0, scrollDeltas[i]));
-      tester.pump();
-    }
-
-    Finder navigationMenuButton = findNavigationMenuButton(tester);
-    expect(navigationMenuButton, findsOneWidget);
-    tester.tap(navigationMenuButton);
-    tester.pump(); // Start opening drawer.
-    tester.pump(const Duration(seconds: 1)); // Wait until it's really opened.
-
-    // switch theme
-    tester.tap(find.text('Dark'));
-    tester.pump();
-    tester.pump(const Duration(seconds: 1)); // Wait until it's changed.
-
-    // switch theme
-    tester.tap(find.text('Light'));
-    tester.pump();
-    tester.pump(const Duration(seconds: 1)); // Wait until it's changed.
-  }, skip: true);
-}

examples/flutter_gallery/material_gallery/test_driver/scroll_perf.dart

@@ -1,11 +0,0 @@
-// Copyright 2016 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:flutter_driver/driver_extension.dart';
-import 'package:flutter_gallery/main.dart' as app;
-
-void main() {
-  enableFlutterDriverExtension();
-  app.main();
-}

examples/flutter_gallery/material_gallery/test_driver/scroll_perf_test.dart

@@ -1,53 +0,0 @@
-// Copyright 2016 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:async';
-
-import 'package:flutter_driver/flutter_driver.dart';
-import 'package:test/test.dart';
-
-void main() {
-  group('scrolling performance test', () {
-    FlutterDriver driver;
-
-    setUpAll(() async {
-      driver = await FlutterDriver.connect();
-    });
-
-    tearDownAll(() async {
-      if (driver != null)
-        driver.close();
-    });
-
-    test('measure', () async {
-      Timeline timeline = await driver.traceAction(() async {
-        // Find the scrollable stock list
-        SerializableFinder stockList = find.byValueKey('Gallery List');
-        expect(stockList, isNotNull);
-
-        await driver.tap(find.text('Demos'));
-        await driver.tap(find.text('Components'));
-        await driver.tap(find.text('Style'));
-
-        // TODO(eseidel): These are very artifical scrolls, we should use better
-        // https://github.com/flutter/flutter/issues/3316
-        // Scroll down
-        for (int i = 0; i < 5; i++) {
-          await driver.scroll(stockList, 0.0, -300.0, new Duration(milliseconds: 300));
-          await new Future<Null>.delayed(new Duration(milliseconds: 500));
-        }
-
-        // Scroll up
-        for (int i = 0; i < 5; i++) {
-          await driver.scroll(stockList, 0.0, 300.0, new Duration(milliseconds: 300));
-          await new Future<Null>.delayed(new Duration(milliseconds: 500));
-        }
-      });
-
-      new TimelineSummary.summarize(timeline)
-        ..writeSummaryToFile('home_scroll_perf', pretty: true)
-        ..writeTimelineToFile('home_scroll_perf', pretty: true);
-    });
-  });
-}

examples/flutter_gallery/material_gallery/test_driver/transitions_perf.dart

@@ -1,11 +0,0 @@
-// Copyright 2016 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:flutter_driver/driver_extension.dart';
-import 'package:flutter_gallery/main.dart' as app;
-
-void main() {
-  enableFlutterDriverExtension();
-  app.main();
-}

examples/flutter_gallery/material_gallery/test_driver/transitions_perf_test.dart

@@ -1,93 +0,0 @@
-// Copyright 2016 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:async';
-
-import 'package:flutter_driver/flutter_driver.dart';
-import 'package:test/test.dart';
-
-// Warning: the following strings must be kept in sync with GalleryHome.
-const List<String> demoCategories = const <String>['Demos', 'Components', 'Style'];
-
-const List<String> demoNames = const <String>[
-  'Weather',
-  'Fitness',
-  'Fancy lines',
-  'Flexible space toolbar',
-  'Floating action button',
-  'Buttons',
-  'Cards',
-  'Chips',
-  'Date picker',
-  'Data tables',
-  'Dialog',
-  'Drop-down button',
-  'Expand/collapse list control',
-  'Grid',
-  'Icons',
-  'Leave-behind list items',
-  'List',
-  'Menus',
-  'Modal bottom sheet',
-  'Over-scroll',
-  'Page selector',
-  'Persistent bottom sheet',
-  'Progress indicators',
-  'Scrollable tabs',
-  'Selection controls',
-  'Sliders',
-  'Snackbar',
-  'Tabs',
-  'Text fields',
-  'Time picker',
-  'Tooltips',
-  'Colors',
-  'Typography'
-];
-
-void main() {
-  group('flutter gallery transitions', () {
-    FlutterDriver driver;
-    setUpAll(() async {
-      driver = await FlutterDriver.connect();
-    });
-
-    tearDownAll(() async {
-      if (driver != null)
-        driver.close();
-    });
-
-    test('all demos', () async {
-      Timeline timeline = await driver.traceAction(() async {
-        // Expand the demo category submenus.
-        for (String category in demoCategories.reversed) {
-          await driver.tap(find.text(category));
-          await new Future<Null>.delayed(new Duration(milliseconds: 500));
-        }
-        // Scroll each demo menu item into view, launch the demo and
-        // return to the demo menu 2x.
-        for(String demoName in demoNames) {
-          SerializableFinder menuItem = find.text(demoName);
-          await driver.scrollIntoView(menuItem);
-          await new Future<Null>.delayed(new Duration(milliseconds: 500));
-
-          for(int i = 0; i < 2; i += 1) {
-            await driver.tap(menuItem); // Launch the demo
-            await new Future<Null>.delayed(new Duration(milliseconds: 500));
-            await driver.tap(find.byTooltip('Back'));
-            await new Future<Null>.delayed(new Duration(milliseconds: 1000));
-          }
-        }
-      },
-      categories: const <TracingCategory>[
-        TracingCategory.dart,
-        TracingCategory.gc,
-        TracingCategory.compiler
-      ]);
-      new TimelineSummary.summarize(timeline)
-        ..writeSummaryToFile('transitions_perf', pretty: true)
-        ..writeTimelineToFile('transitions_perf', pretty: true);
-    }, timeout: new Timeout(new Duration(minutes: 15)));
-  });
-}