| // 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 [InputDecoration]. |
| |
| 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 MaterialApp( |
| title: _title, |
| home: Scaffold( |
| appBar: AppBar(title: const Text(_title)), |
| body: const MyStatelessWidget(), |
| ), |
| ); |
| } |
| } |
| |
| class MyStatelessWidget extends StatelessWidget { |
| const MyStatelessWidget({super.key}); |
| |
| @override |
| Widget build(BuildContext context) { |
| final ThemeData themeData = Theme.of(context); |
| return Theme( |
| data: themeData.copyWith( |
| inputDecorationTheme: themeData.inputDecorationTheme.copyWith( |
| prefixIconColor: MaterialStateColor.resolveWith((Set<MaterialState> states) { |
| if (states.contains(MaterialState.focused)) { |
| return Colors.green; |
| } if (states.contains(MaterialState.error)) { |
| return Colors.red; |
| } |
| return Colors.grey; |
| }), |
| ) |
| ), |
| child: TextFormField( |
| initialValue: 'abc', |
| decoration: const InputDecoration( |
| prefixIcon: Icon(Icons.person), |
| ), |
| ), |
| ); |
| } |
| } |