fractionally_sized_box.0.dart 1.17 KB
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// 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.

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// Flutter code sample for [FractionallySizedBox].
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import 'package:flutter/material.dart';

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void main() => runApp(const FractionallySizedBoxApp());
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class FractionallySizedBoxApp extends StatelessWidget {
  const FractionallySizedBoxApp({super.key});
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  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
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        appBar: AppBar(title: const Text('FractionallySizedBox Sample')),
        body: const FractionallySizedBoxExample(),
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      ),
    );
  }
}

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class FractionallySizedBoxExample extends StatelessWidget {
  const FractionallySizedBoxExample({super.key});
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  @override
  Widget build(BuildContext context) {
    return SizedBox.expand(
      child: FractionallySizedBox(
        widthFactor: 0.5,
        heightFactor: 0.5,
        alignment: FractionalOffset.center,
        child: DecoratedBox(
          decoration: BoxDecoration(
            border: Border.all(
              color: Colors.blue,
              width: 4,
            ),
          ),
        ),
      ),
    );
  }
}