flutter/examples/api/lib/cupertino/search_field/cupertino_search_field.1.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.

// Flutter code sample for [CupertinoSearchTextField].

import 'package:flutter/cupertino.dart';

void main() => runApp(const SearchTextFieldApp());

class SearchTextFieldApp extends StatelessWidget {
  const SearchTextFieldApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const CupertinoApp(
      theme: CupertinoThemeData(brightness: Brightness.light),
      home: SearchTextFieldExample(),
    );
  }
}

class SearchTextFieldExample extends StatefulWidget {
  const SearchTextFieldExample({super.key});

  @override
  State<SearchTextFieldExample> createState() => _SearchTextFieldExampleState();
}

class _SearchTextFieldExampleState extends State<SearchTextFieldExample> {
  String text = '';

  @override
  Widget build(BuildContext context) {
    return CupertinoPageScaffold(
      navigationBar: const CupertinoNavigationBar(
        middle: Text('CupertinoSearchTextField Sample'),
      ),
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(text),
            Padding(
              padding: const EdgeInsets.all(16.0),
              child: SearchTextField(
                fieldValue: (String value) {
                  setState(() {
                    text = value;
                  });
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class SearchTextField extends StatelessWidget {
  const SearchTextField({
    super.key,
    required this.fieldValue,
  });

  final ValueChanged<String> fieldValue;

  @override
  Widget build(BuildContext context) {
    return CupertinoSearchTextField(
      onChanged: (String value) {
        fieldValue('The text has changed to: $value');
      },
      onSubmitted: (String value) {
        fieldValue('Submitted text: $value');
      },
    );
  }
}