| // 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 CupertinoSlider |
| |
| import 'package:flutter/cupertino.dart'; |
| |
| void main() => runApp(const MyApp()); |
| |
| class MyApp extends StatelessWidget { |
| const MyApp({Key? key}) : super(key: key); |
| |
| static const String _title = 'Flutter Code Sample'; |
| |
| @override |
| Widget build(BuildContext context) { |
| return const CupertinoApp( |
| title: _title, |
| home: CupertinoSliderSample(), |
| ); |
| } |
| } |
| |
| class CupertinoSliderSample extends StatefulWidget { |
| const CupertinoSliderSample({Key? key}) : super(key: key); |
| |
| @override |
| State<CupertinoSliderSample> createState() => _CupertinoSliderSampleState(); |
| } |
| |
| class _CupertinoSliderSampleState extends State<CupertinoSliderSample> { |
| double _currentSliderValue = 0.0; |
| String? _sliderStatus; |
| |
| @override |
| Widget build(BuildContext context) { |
| return CupertinoPageScaffold( |
| child: Center( |
| child: Column( |
| mainAxisSize: MainAxisSize.min, |
| children: <Widget>[ |
| // Display the current slider value. |
| Text('$_currentSliderValue'), |
| CupertinoSlider( |
| key: const Key('slider'), |
| value: _currentSliderValue, |
| // This allows the slider to jump between divisions. |
| // If null, the slide movement is continuous. |
| divisions: 5, |
| // The maximum slider value |
| max: 100, |
| activeColor: CupertinoColors.systemPurple, |
| thumbColor: CupertinoColors.systemPurple, |
| // This is called when sliding is started. |
| onChangeStart: (double value) { |
| setState(() { |
| _sliderStatus = 'Sliding'; |
| }); |
| }, |
| // This is called when sliding has ended. |
| onChangeEnd: (double value) { |
| setState(() { |
| _sliderStatus = 'Finished sliding'; |
| }); |
| }, |
| // This is called when slider value is changed. |
| onChanged: (double value) { |
| setState(() { |
| _currentSliderValue = value; |
| }); |
| }, |
| ), |
| Text( |
| _sliderStatus ?? '', |
| style: CupertinoTheme.of(context).textTheme.textStyle.copyWith( |
| fontSize: 12, |
| ), |
| ), |
| ], |
| ), |
| ), |
| ); |
| } |
| } |