[Gallery] Implement material progress indicator and cupertino activity indicator demos (#200)

gallery/gallery/lib/codeviewer/code_segments.dart

@@ -814,6 +814,110 @@ class CodeSegments {
     ]);
   }
 
+  static TextSpan cupertinoActivityIndicatorDemo(BuildContext context) {
+    final CodeStyle codeStyle = CodeStyle.of(context);
+    return TextSpan(children: [
+      TextSpan(
+          style: codeStyle.commentStyle,
+          text: '// Copyright 2019 The Flutter team. All rights reserved.'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(
+          style: codeStyle.commentStyle,
+          text:
+              '// Use of this source code is governed by a BSD-style license that can be'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(
+          style: codeStyle.commentStyle, text: '// found in the LICENSE file.'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a'),
+      TextSpan(style: codeStyle.keywordStyle, text: 'import'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(
+          style: codeStyle.stringStyle,
+          text: '\u0027package:flutter/cupertino.dart\u0027'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(style: codeStyle.keywordStyle, text: 'import'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(
+          style: codeStyle.stringStyle,
+          text: '\u0027package:gallery/l10n/gallery_localizations.dart\u0027'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a'),
+      TextSpan(style: codeStyle.keywordStyle, text: 'class'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(
+          style: codeStyle.classStyle, text: 'CupertinoProgressIndicatorDemo'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'extends'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'StatelessWidget'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.keywordStyle, text: '@override'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.classStyle, text: 'Widget'),
+      TextSpan(style: codeStyle.baseStyle, text: ' build'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.classStyle, text: 'BuildContext'),
+      TextSpan(style: codeStyle.baseStyle, text: ' context'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'return'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'CupertinoPageScaffold'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      navigationBar'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'CupertinoNavigationBar'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        middle'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Text'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a          '),
+      TextSpan(style: codeStyle.classStyle, text: 'GalleryLocalizations'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'of'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'context'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ').'),
+      TextSpan(
+          style: codeStyle.baseStyle,
+          text: 'demoCupertinoActivityIndicatorTitle'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      child'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'const'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Center'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        child'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'CupertinoActivityIndicator'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '(),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.punctuationStyle, text: ');'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a'),
+    ]);
+  }
+
   static TextSpan cupertinoSliderDemo(BuildContext context) {
     final CodeStyle codeStyle = CodeStyle.of(context);
     return TextSpan(children: [
@@ -9587,6 +9691,557 @@ class CodeSegments {
     ]);
   }
 
+  static TextSpan progressIndicatorsDemo(BuildContext context) {
+    final CodeStyle codeStyle = CodeStyle.of(context);
+    return TextSpan(children: [
+      TextSpan(
+          style: codeStyle.commentStyle,
+          text: '// Copyright 2019 The Flutter team. All rights reserved.'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(
+          style: codeStyle.commentStyle,
+          text:
+              '// Use of this source code is governed by a BSD-style license that can be'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(
+          style: codeStyle.commentStyle, text: '// found in the LICENSE file.'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a'),
+      TextSpan(style: codeStyle.keywordStyle, text: 'import'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(
+          style: codeStyle.stringStyle,
+          text: '\u0027package:flutter/material.dart\u0027'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(style: codeStyle.keywordStyle, text: 'import'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(
+          style: codeStyle.stringStyle,
+          text: '\u0027package:gallery/l10n/gallery_localizations.dart\u0027'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a'),
+      TextSpan(style: codeStyle.keywordStyle, text: 'enum'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'ProgressIndicatorDemoType'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  circular'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  linear'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a'),
+      TextSpan(style: codeStyle.keywordStyle, text: 'class'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'ProgressIndicatorDemo'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'extends'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'StatefulWidget'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'const'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'ProgressIndicatorDemo'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '({'),
+      TextSpan(style: codeStyle.classStyle, text: 'Key'),
+      TextSpan(style: codeStyle.baseStyle, text: ' key'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'this'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'type'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '})'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'super'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'key'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' key'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ');'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a  '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'final'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'ProgressIndicatorDemoType'),
+      TextSpan(style: codeStyle.baseStyle, text: ' type'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a  '),
+      TextSpan(style: codeStyle.keywordStyle, text: '@override'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(
+          style: codeStyle.classStyle, text: '_ProgressIndicatorDemoState'),
+      TextSpan(style: codeStyle.baseStyle, text: ' createState'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '()'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '=>'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(
+          style: codeStyle.classStyle, text: '_ProgressIndicatorDemoState'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '();'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a'),
+      TextSpan(style: codeStyle.keywordStyle, text: 'class'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(
+          style: codeStyle.classStyle, text: '_ProgressIndicatorDemoState'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'extends'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'State'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '<'),
+      TextSpan(style: codeStyle.classStyle, text: 'ProgressIndicatorDemo'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '>'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'with'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(
+          style: codeStyle.classStyle, text: 'SingleTickerProviderStateMixin'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.classStyle, text: 'AnimationController'),
+      TextSpan(style: codeStyle.baseStyle, text: ' _controller'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.classStyle, text: 'Animation'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '<'),
+      TextSpan(style: codeStyle.keywordStyle, text: 'double'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '>'),
+      TextSpan(style: codeStyle.baseStyle, text: ' _animation'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a  '),
+      TextSpan(style: codeStyle.keywordStyle, text: '@override'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'void'),
+      TextSpan(style: codeStyle.baseStyle, text: ' initState'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '()'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'super'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'initState'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '();'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    _controller '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '='),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'AnimationController'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      duration'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'const'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Duration'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'milliseconds'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.numberStyle, text: '1500'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      vsync'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'this'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(
+          style: codeStyle.baseStyle, text: '\u000a      animationBehavior'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'AnimationBehavior'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'preserve'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')..'),
+      TextSpan(style: codeStyle.baseStyle, text: 'forward'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '();'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a    _animation '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '='),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'CurvedAnimation'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      parent'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' _controller'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      curve'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'const'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Interval'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.numberStyle, text: '0.0'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.numberStyle, text: '0.9'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: ' curve'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Curves'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'fastOutSlowIn'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      reverseCurve'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Curves'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'fastOutSlowIn'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')..'),
+      TextSpan(style: codeStyle.baseStyle, text: 'addStatusListener'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '(('),
+      TextSpan(style: codeStyle.baseStyle, text: 'status'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'if'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'status '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '=='),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'AnimationStatus'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'dismissed'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a          _controller'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'forward'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '();'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'else'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'if'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'status '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '=='),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'AnimationStatus'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'completed'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a          _controller'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'reverse'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '();'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '});'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a  '),
+      TextSpan(style: codeStyle.keywordStyle, text: '@override'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'void'),
+      TextSpan(style: codeStyle.baseStyle, text: ' dispose'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '()'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    _controller'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'stop'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '();'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'super'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'dispose'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '();'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a  '),
+      TextSpan(style: codeStyle.classStyle, text: 'String'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'get'),
+      TextSpan(style: codeStyle.baseStyle, text: ' _title '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'switch'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'widget'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'type'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'case'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'ProgressIndicatorDemoType'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'circular'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'return'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'GalleryLocalizations'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'of'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'context'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(
+          style: codeStyle.baseStyle,
+          text: 'demoCircularProgressIndicatorTitle'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'case'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'ProgressIndicatorDemoType'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'linear'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'return'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'GalleryLocalizations'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'of'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'context'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(
+          style: codeStyle.baseStyle, text: 'demoLinearProgressIndicatorTitle'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'return'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.stringStyle, text: '\u0027\u0027'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ';'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a  '),
+      TextSpan(style: codeStyle.classStyle, text: 'Widget'),
+      TextSpan(style: codeStyle.baseStyle, text: ' _buildIndicators'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.classStyle, text: 'BuildContext'),
+      TextSpan(style: codeStyle.baseStyle, text: ' context'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Widget'),
+      TextSpan(style: codeStyle.baseStyle, text: ' child'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'switch'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'widget'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'type'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'case'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'ProgressIndicatorDemoType'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'circular'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'return'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Column'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a          children'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '['),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'const'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'CircularProgressIndicator'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '(),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            '),
+      TextSpan(style: codeStyle.classStyle, text: 'SizedBox'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'height'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.numberStyle, text: '32'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            '),
+      TextSpan(style: codeStyle.classStyle, text: 'CircularProgressIndicator'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'value'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' _animation'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'value'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a          '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '],'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.punctuationStyle, text: ');'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'case'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'ProgressIndicatorDemoType'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'linear'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'return'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Column'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a          children'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '['),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'const'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'LinearProgressIndicator'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '(),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            '),
+      TextSpan(style: codeStyle.classStyle, text: 'SizedBox'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'height'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.numberStyle, text: '32'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            '),
+      TextSpan(style: codeStyle.classStyle, text: 'LinearProgressIndicator'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: 'value'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' _animation'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'value'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a          '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '],'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.punctuationStyle, text: ');'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'default'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'return'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Container'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '();'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a  '),
+      TextSpan(style: codeStyle.keywordStyle, text: '@override'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.classStyle, text: 'Widget'),
+      TextSpan(style: codeStyle.baseStyle, text: ' build'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.classStyle, text: 'BuildContext'),
+      TextSpan(style: codeStyle.baseStyle, text: ' context'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ')'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '{'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'return'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Scaffold'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      appBar'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'AppBar'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        title'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Text'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '_title'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      body'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Center'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        child'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'SingleChildScrollView'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a          child'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'Container'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            padding'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.keywordStyle, text: 'const'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'EdgeInsets'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '.'),
+      TextSpan(style: codeStyle.baseStyle, text: 'all'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(style: codeStyle.numberStyle, text: '8'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            child'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' '),
+      TextSpan(style: codeStyle.classStyle, text: 'AnimatedBuilder'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '('),
+      TextSpan(
+          style: codeStyle.baseStyle, text: '\u000a              animation'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' _animation'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a              builder'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ':'),
+      TextSpan(style: codeStyle.baseStyle, text: ' _buildIndicators'),
+      TextSpan(style: codeStyle.punctuationStyle, text: ','),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a            '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a          '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a        '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a      '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '),'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a    '),
+      TextSpan(style: codeStyle.punctuationStyle, text: ');'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a  '),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a'),
+      TextSpan(style: codeStyle.punctuationStyle, text: '}'),
+      TextSpan(style: codeStyle.baseStyle, text: '\u000a\u000a'),
+    ]);
+  }
+
   static TextSpan bottomSheetDemoModal(BuildContext context) {
     final CodeStyle codeStyle = CodeStyle.of(context);
     return TextSpan(children: [

gallery/gallery/lib/data/demos.dart

@@ -8,6 +8,7 @@ import 'package:gallery/codeviewer/code_displayer.dart';
 import 'package:gallery/codeviewer/code_segments.dart';
 import 'package:gallery/data/gallery_options.dart';
 import 'package:gallery/data/icons.dart';
+import 'package:gallery/demos/cupertino/cupertino_activity_indicator_demo.dart';
 import 'package:gallery/demos/cupertino/cupertino_alert_demo.dart';
 import 'package:gallery/demos/cupertino/cupertino_button_demo.dart';
 import 'package:gallery/demos/cupertino/cupertino_segmented_control_demo.dart';
@@ -21,6 +22,7 @@ import 'package:gallery/demos/material/button_demo.dart';
 import 'package:gallery/demos/material/chip_demo.dart';
 import 'package:gallery/demos/material/dialog_demo.dart';
 import 'package:gallery/demos/material/list_demo.dart';
+import 'package:gallery/demos/material/progress_indicator_demo.dart';
 import 'package:gallery/demos/material/selection_controls_demo.dart';
 import 'package:gallery/demos/material/sliders_demo.dart';
 import 'package:gallery/demos/material/snackbar_demo.dart';
@@ -299,6 +301,37 @@ List<GalleryDemo> materialDemos(BuildContext context) {
         ),
       ],
     ),
+    GalleryDemo(
+      title: GalleryLocalizations.of(context).demoProgressIndicatorTitle,
+      icon: GalleryIcons.progressActivity,
+      subtitle: GalleryLocalizations.of(context).demoProgressIndicatorSubtitle,
+      configurations: [
+        GalleryDemoConfiguration(
+          title: GalleryLocalizations.of(context)
+              .demoCircularProgressIndicatorTitle,
+          description: GalleryLocalizations.of(context)
+              .demoCircularProgressIndicatorDescription,
+          documentationUrl:
+              'https://api.flutter.dev/flutter/material/CircularProgressIndicator-class.html',
+          buildRoute: (context) => ProgressIndicatorDemo(
+            type: ProgressIndicatorDemoType.circular,
+          ),
+          code: CodeSegments.progressIndicatorsDemo,
+        ),
+        GalleryDemoConfiguration(
+          title:
+              GalleryLocalizations.of(context).demoLinearProgressIndicatorTitle,
+          description: GalleryLocalizations.of(context)
+              .demoLinearProgressIndicatorDescription,
+          documentationUrl:
+              'https://api.flutter.dev/flutter/material/LinearProgressIndicator-class.html',
+          buildRoute: (context) => ProgressIndicatorDemo(
+            type: ProgressIndicatorDemoType.linear,
+          ),
+          code: CodeSegments.progressIndicatorsDemo,
+        ),
+      ],
+    ),
     GalleryDemo(
       title: GalleryLocalizations.of(context).demoSelectionControlsTitle,
       icon: GalleryIcons.checkBox,
@@ -429,6 +462,25 @@ List<GalleryDemo> materialDemos(BuildContext context) {
 
 List<GalleryDemo> cupertinoDemos(BuildContext context) {
   return [
+    GalleryDemo(
+      title:
+          GalleryLocalizations.of(context).demoCupertinoActivityIndicatorTitle,
+      icon: GalleryIcons.cupertinoProgress,
+      subtitle: GalleryLocalizations.of(context)
+          .demoCupertinoActivityIndicatorSubtitle,
+      configurations: [
+        GalleryDemoConfiguration(
+          title: GalleryLocalizations.of(context)
+              .demoCupertinoActivityIndicatorTitle,
+          description: GalleryLocalizations.of(context)
+              .demoCupertinoActivityIndicatorDescription,
+          documentationUrl:
+              'https://api.flutter.dev/flutter/cupertino/CupertinoActivityIndicator-class.html',
+          buildRoute: (_) => CupertinoProgressIndicatorDemo(),
+          code: CodeSegments.cupertinoActivityIndicatorDemo,
+        ),
+      ],
+    ),
     GalleryDemo(
       title: GalleryLocalizations.of(context).demoCupertinoButtonsTitle,
       icon: GalleryIcons.genericButtons,
@@ -540,7 +592,7 @@ List<GalleryDemo> cupertinoDemos(BuildContext context) {
     ),
     GalleryDemo(
       title: GalleryLocalizations.of(context).demoSelectionControlsSwitchTitle,
-      icon: GalleryIcons.switches,
+      icon: GalleryIcons.cupertinoSwitch,
       subtitle: GalleryLocalizations.of(context).demoCupertinoSwitchSubtitle,
       configurations: [
         GalleryDemoConfiguration(

gallery/gallery/lib/demos/cupertino/cupertino_activity_indicator_demo.dart

@@ -0,0 +1,26 @@
+// Copyright 2019 The Flutter team. 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/cupertino.dart';
+import 'package:gallery/l10n/gallery_localizations.dart';
+
+// BEGIN cupertinoActivityIndicatorDemo
+
+class CupertinoProgressIndicatorDemo extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return CupertinoPageScaffold(
+      navigationBar: CupertinoNavigationBar(
+        middle: Text(
+          GalleryLocalizations.of(context).demoCupertinoActivityIndicatorTitle,
+        ),
+      ),
+      child: const Center(
+        child: CupertinoActivityIndicator(),
+      ),
+    );
+  }
+}
+
+// END

gallery/gallery/lib/demos/material/progress_indicator_demo.dart

@@ -0,0 +1,113 @@
+// Copyright 2019 The Flutter team. 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:gallery/l10n/gallery_localizations.dart';
+
+// BEGIN progressIndicatorsDemo
+
+enum ProgressIndicatorDemoType {
+  circular,
+  linear,
+}
+
+class ProgressIndicatorDemo extends StatefulWidget {
+  const ProgressIndicatorDemo({Key key, this.type}) : super(key: key);
+
+  final ProgressIndicatorDemoType type;
+
+  @override
+  _ProgressIndicatorDemoState createState() => _ProgressIndicatorDemoState();
+}
+
+class _ProgressIndicatorDemoState extends State<ProgressIndicatorDemo>
+    with SingleTickerProviderStateMixin {
+  AnimationController _controller;
+  Animation<double> _animation;
+
+  @override
+  void initState() {
+    super.initState();
+    _controller = AnimationController(
+      duration: const Duration(milliseconds: 1500),
+      vsync: this,
+      animationBehavior: AnimationBehavior.preserve,
+    )..forward();
+
+    _animation = CurvedAnimation(
+      parent: _controller,
+      curve: const Interval(0.0, 0.9, curve: Curves.fastOutSlowIn),
+      reverseCurve: Curves.fastOutSlowIn,
+    )..addStatusListener((status) {
+        if (status == AnimationStatus.dismissed) {
+          _controller.forward();
+        } else if (status == AnimationStatus.completed) {
+          _controller.reverse();
+        }
+      });
+  }
+
+  @override
+  void dispose() {
+    _controller.stop();
+    super.dispose();
+  }
+
+  String get _title {
+    switch (widget.type) {
+      case ProgressIndicatorDemoType.circular:
+        return GalleryLocalizations.of(context)
+            .demoCircularProgressIndicatorTitle;
+      case ProgressIndicatorDemoType.linear:
+        return GalleryLocalizations.of(context)
+            .demoLinearProgressIndicatorTitle;
+    }
+    return '';
+  }
+
+  Widget _buildIndicators(BuildContext context, Widget child) {
+    switch (widget.type) {
+      case ProgressIndicatorDemoType.circular:
+        return Column(
+          children: [
+            const CircularProgressIndicator(),
+            SizedBox(height: 32),
+            CircularProgressIndicator(value: _animation.value),
+          ],
+        );
+      case ProgressIndicatorDemoType.linear:
+        return Column(
+          children: [
+            const LinearProgressIndicator(),
+            SizedBox(height: 32),
+            LinearProgressIndicator(value: _animation.value),
+          ],
+        );
+      default:
+        return Container();
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(_title),
+      ),
+      body: Center(
+        child: SingleChildScrollView(
+          child: Container(
+            padding: const EdgeInsets.all(8),
+            child: AnimatedBuilder(
+              animation: _animation,
+              builder: _buildIndicators,
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+// END

gallery/gallery/lib/l10n/gallery_localizations.dart

@@ -1464,6 +1464,21 @@ class GalleryLocalizations {
         desc: r'Title for the choice chip component demo.');
   }
 
+  String get demoCircularProgressIndicatorDescription {
+    return Intl.message(
+        r'A Material Design circular progress indicator, which spins to indicate that the application is busy.',
+        locale: _localeName,
+        name: 'demoCircularProgressIndicatorDescription',
+        desc: r'Description for circular progress indicator demo.');
+  }
+
+  String get demoCircularProgressIndicatorTitle {
+    return Intl.message(r'Circular Progress Indicator',
+        locale: _localeName,
+        name: 'demoCircularProgressIndicatorTitle',
+        desc: r'Title for circular progress indicator demo.');
+  }
+
   String get demoCodeTooltip {
     return Intl.message(r'Code Sample',
         locale: _localeName,
@@ -1535,6 +1550,29 @@ class GalleryLocalizations {
         desc: r'Title for the cupertino action sheet component demo.');
   }
 
+  String get demoCupertinoActivityIndicatorDescription {
+    return Intl.message(
+        r'An iOS-style activity indicator that spins clockwise.',
+        locale: _localeName,
+        name: 'demoCupertinoActivityIndicatorDescription',
+        desc:
+            r'Description for the cupertino activity indicator component demo.');
+  }
+
+  String get demoCupertinoActivityIndicatorSubtitle {
+    return Intl.message(r'iOS-style activity indicators',
+        locale: _localeName,
+        name: 'demoCupertinoActivityIndicatorSubtitle',
+        desc: r'Subtitle for the cupertino activity indicator component demo.');
+  }
+
+  String get demoCupertinoActivityIndicatorTitle {
+    return Intl.message(r'Activity Indicator',
+        locale: _localeName,
+        name: 'demoCupertinoActivityIndicatorTitle',
+        desc: r'Title for the cupertino activity indicator component demo.');
+  }
+
   String get demoCupertinoAlertButtonsOnlyTitle {
     return Intl.message(r'Alert Buttons Only',
         locale: _localeName,
@@ -1839,6 +1877,21 @@ class GalleryLocalizations {
         desc: r'Error message when opening the URL for a demo.');
   }
 
+  String get demoLinearProgressIndicatorDescription {
+    return Intl.message(
+        r'A Material Design linear progress indicator, also known as a progress bar.',
+        locale: _localeName,
+        name: 'demoLinearProgressIndicatorDescription',
+        desc: r'Description for linear progress indicator demo.');
+  }
+
+  String get demoLinearProgressIndicatorTitle {
+    return Intl.message(r'Linear Progress Indicator',
+        locale: _localeName,
+        name: 'demoLinearProgressIndicatorTitle',
+        desc: r'Title for linear progress indicator demo.');
+  }
+
   String get demoListsDescription {
     return Intl.message(
         r'A single fixed-height row that typically contains some text as well as a leading or trailing icon.',
@@ -1914,6 +1967,20 @@ class GalleryLocalizations {
         desc: r'Title for the outline button component demo.');
   }
 
+  String get demoProgressIndicatorSubtitle {
+    return Intl.message(r'Linear, circular, indeterminate',
+        locale: _localeName,
+        name: 'demoProgressIndicatorSubtitle',
+        desc: r'Subtitle for progress indicators demo.');
+  }
+
+  String get demoProgressIndicatorTitle {
+    return Intl.message(r'Progress indicators',
+        locale: _localeName,
+        name: 'demoProgressIndicatorTitle',
+        desc: r'Title for progress indicators demo.');
+  }
+
   String get demoRaisedButtonDescription {
     return Intl.message(
         r'Raised buttons add dimension to mostly flat layouts. They emphasize functions on busy or wide spaces.',

gallery/gallery/lib/l10n/intl_en_US.arb

@@ -673,6 +673,18 @@
   "@demoFullscreenDialogDescription": {
     "description": "Description for the fullscreen dialog component demo."
   },
+  "demoCupertinoActivityIndicatorTitle": "Activity Indicator",
+  "@demoCupertinoActivityIndicatorTitle": {
+    "description": "Title for the cupertino activity indicator component demo."
+  },
+  "demoCupertinoActivityIndicatorSubtitle": "iOS-style activity indicators",
+  "@demoCupertinoActivityIndicatorSubtitle": {
+    "description": "Subtitle for the cupertino activity indicator component demo."
+  },
+  "demoCupertinoActivityIndicatorDescription": "An iOS-style activity indicator that spins clockwise.",
+  "@demoCupertinoActivityIndicatorDescription": {
+    "description": "Description for the cupertino activity indicator component demo."
+  },
   "demoCupertinoButtonsTitle": "Buttons",
   "@demoCupertinoButtonsTitle": {
     "description": "Title for the cupertino buttons component demo."
@@ -892,6 +904,30 @@
   "@demoListsSecondary": {
     "description": "Text that appears in the second line of a list item."
   },
+  "demoProgressIndicatorTitle": "Progress indicators",
+  "@demoProgressIndicatorTitle": {
+    "description": "Title for progress indicators demo."
+  },
+  "demoProgressIndicatorSubtitle": "Linear, circular, indeterminate",
+  "@demoProgressIndicatorSubtitle": {
+    "description": "Subtitle for progress indicators demo."
+  },
+  "demoCircularProgressIndicatorTitle": "Circular Progress Indicator",
+  "@demoCircularProgressIndicatorTitle": {
+    "description": "Title for circular progress indicator demo."
+  },
+  "demoCircularProgressIndicatorDescription": "A Material Design circular progress indicator, which spins to indicate that the application is busy.",
+  "@demoCircularProgressIndicatorDescription": {
+    "description": "Description for circular progress indicator demo."
+  },
+  "demoLinearProgressIndicatorTitle": "Linear Progress Indicator",
+  "@demoLinearProgressIndicatorTitle": {
+    "description": "Title for linear progress indicator demo."
+  },
+  "demoLinearProgressIndicatorDescription": "A Material Design linear progress indicator, also known as a progress bar.",
+  "@demoLinearProgressIndicatorDescription": {
+    "description": "Description for linear progress indicator demo."
+  },
   "demoTabsTitle": "Tabs",
   "@demoTabsTitle": {
     "description": "Title for tabs demo."

gallery/gallery/lib/l10n/intl_en_US.xml

@@ -637,6 +637,18 @@
     name="demoFullscreenDialogDescription"
     description="Description for the fullscreen dialog component demo."
     >The fullscreenDialog property specifies whether the incoming page is a fullscreen modal dialog</string>
+  <string
+    name="demoCupertinoActivityIndicatorTitle"
+    description="Title for the cupertino activity indicator component demo."
+    >Activity Indicator</string>
+  <string
+    name="demoCupertinoActivityIndicatorSubtitle"
+    description="Subtitle for the cupertino activity indicator component demo."
+    >iOS-style activity indicators</string>
+  <string
+    name="demoCupertinoActivityIndicatorDescription"
+    description="Description for the cupertino activity indicator component demo."
+    >An iOS-style activity indicator that spins clockwise.</string>
   <string
     name="demoCupertinoButtonsTitle"
     description="Title for the cupertino buttons component demo."
@@ -841,6 +853,30 @@
     name="demoListsSecondary"
     description="Text that appears in the second line of a list item."
     >Secondary text</string>
+  <string
+    name="demoProgressIndicatorTitle"
+    description="Title for progress indicators demo."
+    >Progress indicators</string>
+  <string
+    name="demoProgressIndicatorSubtitle"
+    description="Subtitle for progress indicators demo."
+    >Linear, circular, indeterminate</string>
+  <string
+    name="demoCircularProgressIndicatorTitle"
+    description="Title for circular progress indicator demo."
+    >Circular Progress Indicator</string>
+  <string
+    name="demoCircularProgressIndicatorDescription"
+    description="Description for circular progress indicator demo."
+    >A Material Design circular progress indicator, which spins to indicate that the application is busy.</string>
+  <string
+    name="demoLinearProgressIndicatorTitle"
+    description="Title for linear progress indicator demo."
+    >Linear Progress Indicator</string>
+  <string
+    name="demoLinearProgressIndicatorDescription"
+    description="Description for linear progress indicator demo."
+    >A Material Design linear progress indicator, also known as a progress bar.</string>
   <string
     name="demoTabsTitle"
     description="Title for tabs demo."

gallery/gallery/lib/l10n/messages_en_US.dart

@@ -379,6 +379,11 @@ class MessageLookup extends MessageLookupByLibrary {
             "Choice chips represent a single choice from a set. Choice chips contain related descriptive text or categories."),
         "demoChoiceChipTitle":
             MessageLookupByLibrary.simpleMessage("Choice Chip"),
+        "demoCircularProgressIndicatorDescription":
+            MessageLookupByLibrary.simpleMessage(
+                "A Material Design circular progress indicator, which spins to indicate that the application is busy."),
+        "demoCircularProgressIndicatorTitle":
+            MessageLookupByLibrary.simpleMessage("Circular Progress Indicator"),
         "demoCodeTooltip": MessageLookupByLibrary.simpleMessage("Code Sample"),
         "demoCodeViewerCopiedToClipboardMessage":
             MessageLookupByLibrary.simpleMessage("Copied to clipboard."),
@@ -394,6 +399,14 @@ class MessageLookup extends MessageLookupByLibrary {
             "An action sheet is a specific style of alert that presents the user with a set of two or more choices related to the current context. An action sheet can have a title, an additional message, and a list of actions."),
         "demoCupertinoActionSheetTitle":
             MessageLookupByLibrary.simpleMessage("Action Sheet"),
+        "demoCupertinoActivityIndicatorDescription":
+            MessageLookupByLibrary.simpleMessage(
+                "An iOS-style activity indicator that spins clockwise."),
+        "demoCupertinoActivityIndicatorSubtitle":
+            MessageLookupByLibrary.simpleMessage(
+                "iOS-style activity indicators"),
+        "demoCupertinoActivityIndicatorTitle":
+            MessageLookupByLibrary.simpleMessage("Activity Indicator"),
         "demoCupertinoAlertButtonsOnlyTitle":
             MessageLookupByLibrary.simpleMessage("Alert Buttons Only"),
         "demoCupertinoAlertButtonsTitle":
@@ -473,6 +486,11 @@ class MessageLookup extends MessageLookupByLibrary {
             MessageLookupByLibrary.simpleMessage("Input Chip"),
         "demoInvalidURL":
             MessageLookupByLibrary.simpleMessage("Couldn\'t display URL:"),
+        "demoLinearProgressIndicatorDescription":
+            MessageLookupByLibrary.simpleMessage(
+                "A Material Design linear progress indicator, also known as a progress bar."),
+        "demoLinearProgressIndicatorTitle":
+            MessageLookupByLibrary.simpleMessage("Linear Progress Indicator"),
         "demoListsDescription": MessageLookupByLibrary.simpleMessage(
             "A single fixed-height row that typically contains some text as well as a leading or trailing icon."),
         "demoListsSecondary":
@@ -491,6 +509,10 @@ class MessageLookup extends MessageLookupByLibrary {
             "Outline buttons become opaque and elevate when pressed. They are often paired with raised buttons to indicate an alternative, secondary action."),
         "demoOutlineButtonTitle":
             MessageLookupByLibrary.simpleMessage("Outline Button"),
+        "demoProgressIndicatorSubtitle": MessageLookupByLibrary.simpleMessage(
+            "Linear, circular, indeterminate"),
+        "demoProgressIndicatorTitle":
+            MessageLookupByLibrary.simpleMessage("Progress indicators"),
         "demoRaisedButtonDescription": MessageLookupByLibrary.simpleMessage(
             "Raised buttons add dimension to mostly flat layouts. They emphasize functions on busy or wide spaces."),
         "demoRaisedButtonTitle":

gallery/gallery/lib/themes/material_demo_theme_data.dart

@@ -25,6 +25,8 @@ class MaterialDemoThemeData {
     highlightColor: Colors.transparent,
     indicatorColor: _colorScheme.onPrimary,
     primaryColor: _colorScheme.primary,
+    accentColor: _colorScheme.primary,
+    backgroundColor: Colors.white,
     scaffoldBackgroundColor: _colorScheme.background,
     snackBarTheme: SnackBarThemeData(
       behavior: SnackBarBehavior.floating,