flutter/examples/api/lib/widgets/layout_builder/layout_builder.0.dart
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---------

Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
2024-12-19 20:06:21 +00:00

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Dart

// Copyright 2014 The Flutter 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';
/// Flutter code sample for [LayoutBuilder].
void main() => runApp(const LayoutBuilderExampleApp());
class LayoutBuilderExampleApp extends StatelessWidget {
const LayoutBuilderExampleApp({super.key});
@override
Widget build(BuildContext context) {
return const MaterialApp(home: LayoutBuilderExample());
}
}
class LayoutBuilderExample extends StatelessWidget {
const LayoutBuilderExample({super.key});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text('LayoutBuilder Example')),
body: LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
if (constraints.maxWidth > 600) {
return _buildWideContainers();
} else {
return _buildNormalContainer();
}
},
),
);
}
Widget _buildNormalContainer() {
return Center(child: Container(height: 100.0, width: 100.0, color: Colors.red));
}
Widget _buildWideContainers() {
return Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Container(height: 100.0, width: 100.0, color: Colors.red),
Container(height: 100.0, width: 100.0, color: Colors.yellow),
],
),
);
}
}