| // 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'; |
| |
| /// Flutter code sample for [ExpansionTile] and [AnimationStyle]. |
| |
| void main() { |
| runApp(const ExpansionTileAnimationStyleApp()); |
| } |
| |
| enum AnimationStyles { defaultStyle, custom, none } |
| const List<(AnimationStyles, String)> animationStyleSegments = <(AnimationStyles, String)>[ |
| (AnimationStyles.defaultStyle, 'Default'), |
| (AnimationStyles.custom, 'Custom'), |
| (AnimationStyles.none, 'None'), |
| ]; |
| |
| class ExpansionTileAnimationStyleApp extends StatefulWidget { |
| const ExpansionTileAnimationStyleApp({super.key}); |
| |
| @override |
| State<ExpansionTileAnimationStyleApp> createState() => _ExpansionTileAnimationStyleAppState(); |
| } |
| |
| class _ExpansionTileAnimationStyleAppState extends State<ExpansionTileAnimationStyleApp> { |
| Set<AnimationStyles> _animationStyleSelection = <AnimationStyles>{AnimationStyles.defaultStyle}; |
| AnimationStyle? _animationStyle; |
| |
| @override |
| Widget build(BuildContext context) { |
| return MaterialApp( |
| home: Scaffold( |
| body: SafeArea( |
| child: Column( |
| mainAxisAlignment: MainAxisAlignment.center, |
| children: <Widget>[ |
| SegmentedButton<AnimationStyles>( |
| selected: _animationStyleSelection, |
| onSelectionChanged: (Set<AnimationStyles> styles) { |
| setState(() { |
| _animationStyleSelection = styles; |
| switch (styles.first) { |
| case AnimationStyles.defaultStyle: |
| _animationStyle = null; |
| case AnimationStyles.custom: |
| _animationStyle = AnimationStyle( |
| curve: Easing.emphasizedAccelerate, |
| duration: Durations.extralong1, |
| ); |
| case AnimationStyles.none: |
| _animationStyle = AnimationStyle.noAnimation; |
| } |
| }); |
| }, |
| segments: animationStyleSegments |
| .map<ButtonSegment<AnimationStyles>>(((AnimationStyles, String) shirt) { |
| return ButtonSegment<AnimationStyles>(value: shirt.$1, label: Text(shirt.$2)); |
| }) |
| .toList(), |
| ), |
| const SizedBox(height: 20), |
| ExpansionTile( |
| expansionAnimationStyle: _animationStyle, |
| title: const Text('ExpansionTile'), |
| children: const <Widget>[ |
| ListTile(title: Text('Expanded Item 1')), |
| ListTile(title: Text('Expanded Item 2')), |
| ], |
| ) |
| ], |
| ), |
| ), |
| ), |
| ); |
| } |
| } |