| // 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'; |
| import '../utils.dart'; |
| import 'use_cases.dart'; |
| |
| class AutoCompleteUseCase extends UseCase { |
| @override |
| String get name => 'AutoComplete'; |
| |
| @override |
| String get route => '/auto-complete'; |
| |
| @override |
| Widget build(BuildContext context) => const _MainWidget(); |
| } |
| |
| class _MainWidget extends StatefulWidget { |
| const _MainWidget(); |
| |
| @override |
| State<_MainWidget> createState() => _MainWidgetState(); |
| } |
| |
| class _MainWidgetState extends State<_MainWidget> { |
| static const List<String> _kOptions = <String>[ |
| 'apple', |
| 'banana', |
| 'lemon', |
| ]; |
| |
| static Widget _fieldViewBuilder( |
| BuildContext context, |
| TextEditingController textEditingController, |
| FocusNode focusNode, |
| VoidCallback onFieldSubmitted) { |
| return TextFormField( |
| focusNode: focusNode, |
| controller: textEditingController, |
| onFieldSubmitted: (String value) { |
| onFieldSubmitted(); |
| }, |
| ); |
| } |
| |
| String pageTitle = getUseCaseName(AutoCompleteUseCase()); |
| |
| @override |
| Widget build(BuildContext context) { |
| return Scaffold( |
| appBar: AppBar( |
| backgroundColor: Theme.of(context).colorScheme.inversePrimary, |
| title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')), |
| ), |
| body: Center( |
| child: Column( |
| mainAxisAlignment: MainAxisAlignment.center, |
| children: <Widget>[ |
| Text( |
| 'Type below to autocomplete the following possible results: $_kOptions.'), |
| Autocomplete<String>( |
| optionsBuilder: (TextEditingValue textEditingValue) { |
| if (textEditingValue.text == '') { |
| return const Iterable<String>.empty(); |
| } |
| return _kOptions.where((String option) { |
| return option.contains(textEditingValue.text.toLowerCase()); |
| }); |
| }, |
| fieldViewBuilder: _fieldViewBuilder, |
| ), |
| ], |
| ), |
| ), |
| ); |
| } |
| } |