| // 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. |
| |
| // Template: dev/snippets/config/templates/stateful_widget_scaffold.tmpl |
| // |
| // Comment lines marked with "▼▼▼" and "▲▲▲" are used for authoring |
| // of samples, and may be ignored if you are just exploring the sample. |
| |
| // Flutter code sample for RangeSlider |
| // |
| //*************************************************************************** |
| //* ▼▼▼▼▼▼▼▼ description ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) |
| |
| // ![A range slider widget, consisting of 5 divisions and showing the default |
| // value indicator.](https://flutter.github.io/assets-for-api-docs/assets/material/range_slider.png) |
| // |
| // This range values are in intervals of 20 because the Range Slider has 5 |
| // divisions, from 0 to 100. This means are values are split between 0, 20, 40, |
| // 60, 80, and 100. The range values are initialized with 40 and 80 in this demo. |
| |
| //* ▲▲▲▲▲▲▲▲ description ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) |
| //*************************************************************************** |
| |
| import 'package:flutter/material.dart'; |
| |
| void main() => runApp(const MyApp()); |
| |
| /// This is the main application widget. |
| class MyApp extends StatelessWidget { |
| const MyApp({Key? key}) : super(key: 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 MyStatefulWidget(), |
| ), |
| ); |
| } |
| } |
| |
| /// This is the stateful widget that the main application instantiates. |
| class MyStatefulWidget extends StatefulWidget { |
| const MyStatefulWidget({Key? key}) : super(key: key); |
| |
| @override |
| State<MyStatefulWidget> createState() => _MyStatefulWidgetState(); |
| } |
| |
| /// This is the private State class that goes with MyStatefulWidget. |
| class _MyStatefulWidgetState extends State<MyStatefulWidget> { |
| //******************************************************************** |
| //* ▼▼▼▼▼▼▼▼ code ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) |
| |
| RangeValues _currentRangeValues = const RangeValues(40, 80); |
| |
| @override |
| Widget build(BuildContext context) { |
| return RangeSlider( |
| values: _currentRangeValues, |
| min: 0, |
| max: 100, |
| divisions: 5, |
| labels: RangeLabels( |
| _currentRangeValues.start.round().toString(), |
| _currentRangeValues.end.round().toString(), |
| ), |
| onChanged: (RangeValues values) { |
| setState(() { |
| _currentRangeValues = values; |
| }); |
| }, |
| ); |
| } |
| |
| //* ▲▲▲▲▲▲▲▲ code ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) |
| //******************************************************************** |
| |
| } |