| // 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. |
| |
| // Flutter code sample for [MaterialStateOutlinedBorder]. |
| |
| import 'package:flutter/material.dart'; |
| |
| void main() => runApp(const MyApp()); |
| |
| class MyApp extends StatelessWidget { |
| const MyApp({super.key}); |
| |
| static const String _title = 'Flutter Code Sample'; |
| |
| @override |
| Widget build(BuildContext context) { |
| return const MaterialApp( |
| title: _title, |
| home: MyStatefulWidget(), |
| ); |
| } |
| } |
| |
| class SelectedBorder extends RoundedRectangleBorder |
| implements MaterialStateOutlinedBorder { |
| const SelectedBorder(); |
| |
| @override |
| OutlinedBorder? resolve(Set<MaterialState> states) { |
| if (states.contains(MaterialState.selected)) { |
| return const RoundedRectangleBorder(); |
| } |
| return null; // Defer to default value on the theme or widget. |
| } |
| } |
| |
| class MyStatefulWidget extends StatefulWidget { |
| const MyStatefulWidget({super.key}); |
| |
| @override |
| State<MyStatefulWidget> createState() => _MyStatefulWidgetState(); |
| } |
| |
| class _MyStatefulWidgetState extends State<MyStatefulWidget> { |
| bool isSelected = true; |
| |
| @override |
| Widget build(BuildContext context) { |
| return Material( |
| child: FilterChip( |
| label: const Text('Select chip'), |
| selected: isSelected, |
| onSelected: (bool value) { |
| setState(() { |
| isSelected = value; |
| }); |
| }, |
| shape: const SelectedBorder(), |
| ), |
| ); |
| } |
| } |