f794cf9d97
fixes [Expose animation parameters for the [ExpansionTile] widget](https://github.com/flutter/flutter/issues/138047) ### Description Add `AnimationStyle` to the `ExpansionTile` widget to override the default expand and close animation. Syntax: ```dart child: ExpansionTile( title: const Text('Tap to expand'), expansionAnimationStyle: AnimationStyle( duration: Durations.extralong1, curve: Easing.emphasizedAccelerate, ), children: const <Widget>[FlutterLogo(size: 200)], ), ``` ### Code sample <details> <summary>expand to view the code sample</summary> ```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. 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')), ], ) ], ), ), ), ); } } ``` </details> Related to https://github.com/flutter/flutter/pull/138721. |
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| .. | ||
| api | ||
| flutter_view | ||
| hello_world | ||
| image_list | ||
| layers | ||
| platform_channel | ||
| platform_channel_swift | ||
| platform_view | ||
| splash | ||
| texture | ||
| .clang-format | ||
| flutter_gallery.readme | ||
| README.md | ||
Flutter Examples
This directory contains several examples of using Flutter. To run an example,
use flutter run inside that example's directory. See the getting started
guide to install the flutter tool.
For additional samples, see the
flutter/samples repo.
Available examples include:
-
Hello, world The hello world app is a minimal Flutter app that shows the text "Hello, world!"
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Flutter gallery The flutter gallery app no longer lives in this repo. Please see the gallery repo.
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Layers The layers vignettes show how to use the various layers in the Flutter framework. For details, see the layers README.
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Platform Channel The platform channel app demonstrates how to connect a Flutter app to platform-specific APIs. For documentation, see https://flutter.dev/platform-channels/.
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Platform Channel Swift The platform channel swift app is the same as platform channel but the iOS version is in Swift and there is no Android version.
Notes
Note on Gradle wrapper files in .gitignore:
Gradle wrapper files should normally be checked into source control. The example projects don't do that to avoid having several copies of the wrapper binary in the Flutter repo. Instead, the Gradle wrapper is injected by Flutter tooling, and the wrapper files are .gitignore'd to avoid making the Flutter repository dirty as a side effect of running the examples.