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Add examples/layout/lakes/interactive code (#2267)
I'm committing this first so that CI tests for #2264 can pass (external link checking will fail if the sources aren't in the repo).
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../../../README.md |
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import 'package:flutter/material.dart'; | ||
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void main() => runApp(MyApp()); | ||
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class MyApp extends StatelessWidget { | ||
@override | ||
Widget build(BuildContext context) { | ||
Widget titleSection = Container( | ||
padding: const EdgeInsets.all(32.0), | ||
child: Row( | ||
children: [ | ||
Expanded( | ||
/*1*/ | ||
child: Column( | ||
crossAxisAlignment: CrossAxisAlignment.start, | ||
children: [ | ||
/*2*/ | ||
Container( | ||
padding: const EdgeInsets.only(bottom: 8.0), | ||
child: Text( | ||
'Oeschinen Lake Campground', | ||
style: TextStyle( | ||
fontWeight: FontWeight.bold, | ||
), | ||
), | ||
), | ||
Text( | ||
'Kandersteg, Switzerland', | ||
style: TextStyle( | ||
color: Colors.grey[500], | ||
), | ||
), | ||
], | ||
), | ||
), | ||
FavoriteWidget(), | ||
], | ||
), | ||
); | ||
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Color color = Theme.of(context).primaryColor; | ||
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Widget buttonSection = Container( | ||
child: Row( | ||
mainAxisAlignment: MainAxisAlignment.spaceEvenly, | ||
children: [ | ||
_buildButtonColumn(color, Icons.call, 'CALL'), | ||
_buildButtonColumn(color, Icons.near_me, 'ROUTE'), | ||
_buildButtonColumn(color, Icons.share, 'SHARE'), | ||
], | ||
), | ||
); | ||
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Widget textSection = Container( | ||
padding: const EdgeInsets.all(32.0), | ||
child: Text( | ||
'Lake Oeschinen lies at the foot of the Blüemlisalp in the Bernese ' | ||
'Alps. Situated 1,578 meters above sea level, it is one of the ' | ||
'larger Alpine Lakes. A gondola ride from Kandersteg, followed by a ' | ||
'half-hour walk through pastures and pine forest, leads you to the ' | ||
'lake, which warms to 20 degrees Celsius in the summer. Activities ' | ||
'enjoyed here include rowing, and riding the summer toboggan run.', | ||
softWrap: true, | ||
), | ||
); | ||
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return MaterialApp( | ||
title: 'Flutter layout demo', | ||
home: Scaffold( | ||
appBar: AppBar( | ||
title: Text('Flutter layout demo'), | ||
), | ||
body: ListView( | ||
children: [ | ||
Image.asset( | ||
'images/lake.jpg', | ||
width: 600.0, | ||
height: 240.0, | ||
fit: BoxFit.cover, | ||
), | ||
titleSection, | ||
buttonSection, | ||
textSection, | ||
], | ||
), | ||
), | ||
); | ||
} | ||
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Column _buildButtonColumn(Color color, IconData icon, String label) { | ||
return Column( | ||
mainAxisSize: MainAxisSize.min, | ||
mainAxisAlignment: MainAxisAlignment.center, | ||
children: [ | ||
Icon(icon, color: color), | ||
Container( | ||
margin: const EdgeInsets.only(top: 8.0), | ||
child: Text( | ||
label, | ||
style: TextStyle( | ||
fontSize: 12.0, | ||
fontWeight: FontWeight.w400, | ||
color: color, | ||
), | ||
), | ||
), | ||
], | ||
); | ||
} | ||
} | ||
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// #docregion FavoriteWidget | ||
class FavoriteWidget extends StatefulWidget { | ||
@override | ||
_FavoriteWidgetState createState() => _FavoriteWidgetState(); | ||
} | ||
// #enddocregion FavoriteWidget | ||
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// #docregion _FavoriteWidgetState, _FavoriteWidgetState-fields, _FavoriteWidgetState-build | ||
class _FavoriteWidgetState extends State<FavoriteWidget> { | ||
// #enddocregion _FavoriteWidgetState-build | ||
bool _isFavorited = true; | ||
int _favoriteCount = 41; | ||
// #enddocregion _FavoriteWidgetState-fields | ||
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// #docregion _toggleFavorite | ||
void _toggleFavorite() { | ||
setState(() { | ||
if (_isFavorited) { | ||
_favoriteCount -= 1; | ||
_isFavorited = false; | ||
} else { | ||
_favoriteCount += 1; | ||
_isFavorited = true; | ||
} | ||
}); | ||
} | ||
// #enddocregion _toggleFavorite | ||
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// #docregion _FavoriteWidgetState-build | ||
@override | ||
Widget build(BuildContext context) { | ||
return Row( | ||
mainAxisSize: MainAxisSize.min, | ||
children: [ | ||
Container( | ||
padding: EdgeInsets.all(0.0), | ||
child: IconButton( | ||
icon: (_isFavorited ? Icon(Icons.star) : Icon(Icons.star_border)), | ||
color: Colors.red[500], | ||
onPressed: _toggleFavorite, | ||
), | ||
), | ||
SizedBox( | ||
width: 18.0, | ||
child: Container( | ||
child: Text('$_favoriteCount'), | ||
), | ||
), | ||
], | ||
); | ||
} | ||
// #docregion _FavoriteWidgetState-fields | ||
} |
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name: interactive | ||
description: > | ||
Sample app from "Adding interactivity", https://flutter.io/docs/development/ui/interactive. | ||
version: 1.0.0 | ||
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environment: | ||
sdk: '>=2.0.0-dev.68.0 <3.0.0' | ||
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dependencies: | ||
flutter: | ||
sdk: flutter | ||
cupertino_icons: ^0.1.2 | ||
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dev_dependencies: | ||
flutter_test: | ||
sdk: flutter | ||
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flutter: | ||
uses-material-design: true | ||
assets: | ||
- images/lake.jpg |
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// Basic Flutter widget test. Learn more at https://flutter.io/docs/testing. | ||
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import 'package:flutter_test/flutter_test.dart'; | ||
import 'package:flutter/material.dart'; | ||
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import 'package:interactive/main.dart'; | ||
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void main() { | ||
testWidgets('Codelab smoke test', (WidgetTester tester) async { | ||
await tester.pumpWidget(new MyApp()); | ||
expect(find.text('Oeschinen Lake Campground'), findsOneWidget); | ||
expect(find.text('ROUTE'), findsOneWidget); | ||
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expect(find.byIcon(Icons.star), findsOneWidget); | ||
expect(find.text('41'), findsOneWidget); | ||
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await tester.tap(find.byIcon(Icons.star)); | ||
await tester.pump(); | ||
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expect(find.byIcon(Icons.star_border), findsOneWidget); | ||
expect(find.text('40'), findsOneWidget); | ||
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await tester.tap(find.byIcon(Icons.star_border)); | ||
await tester.pump(); | ||
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expect(find.byIcon(Icons.star), findsOneWidget); | ||
expect(find.text('41'), findsOneWidget); | ||
}); | ||
} |