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19e284f88f
This PR introduces `AnimationStyle`, it is used to override default animation curves and durations in several widgets. fixes [Add the ability to customize MaterialApp theme animation duration](https://github.com/flutter/flutter/issues/78372) fixes [Allow customization of showMenu transition animation curves and duration](https://github.com/flutter/flutter/issues/135638) Here is an example where popup menu curve and transition duration is overriden: ```dart popUpAnimationStyle: AnimationStyle( curve: Easing.emphasizedAccelerate, duration: Durations.medium4, ), ``` Set `AnimationStyle.noAnimation` to disable animation. ```dart return MaterialApp( themeAnimationStyle: AnimationStyle.noAnimation, ```
88 lines
3.0 KiB
Dart
88 lines
3.0 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/material.dart';
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/// Flutter code sample for [MaterialApp].
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void main() {
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runApp(const MaterialAppExample());
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}
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enum AnimationStyles { defaultStyle, custom, none }
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const List<(AnimationStyles, String)> animationStyleSegments = <(AnimationStyles, String)>[
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(AnimationStyles.defaultStyle, 'Default'),
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(AnimationStyles.custom, 'Custom'),
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(AnimationStyles.none, 'None'),
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];
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class MaterialAppExample extends StatefulWidget {
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const MaterialAppExample({super.key});
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@override
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State<MaterialAppExample> createState() => _MaterialAppExampleState();
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}
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class _MaterialAppExampleState extends State<MaterialAppExample> {
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Set<AnimationStyles> _animationStyleSelection = <AnimationStyles>{AnimationStyles.defaultStyle};
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AnimationStyle? _animationStyle;
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bool isDarkTheme = false;
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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themeAnimationStyle: _animationStyle,
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themeMode: isDarkTheme ? ThemeMode.dark : ThemeMode.light,
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theme: ThemeData(colorSchemeSeed: Colors.green),
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darkTheme: ThemeData(
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colorSchemeSeed: Colors.green,
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brightness: Brightness.dark,
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),
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home: Scaffold(
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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SegmentedButton<AnimationStyles>(
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selected: _animationStyleSelection,
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onSelectionChanged: (Set<AnimationStyles> styles) {
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setState(() {
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_animationStyleSelection = styles;
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switch (styles.first) {
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case AnimationStyles.defaultStyle:
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_animationStyle = null;
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case AnimationStyles.custom:
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_animationStyle = AnimationStyle(
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curve: Easing.emphasizedAccelerate,
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duration: const Duration(seconds: 1),
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);
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case AnimationStyles.none:
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_animationStyle = AnimationStyle.noAnimation;
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}
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});
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},
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segments: animationStyleSegments
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.map<ButtonSegment<AnimationStyles>>(((AnimationStyles, String) shirt) {
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return ButtonSegment<AnimationStyles>(value: shirt.$1, label: Text(shirt.$2));
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})
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.toList(),
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),
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const SizedBox(height: 10),
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OutlinedButton.icon(
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onPressed: () {
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setState(() {
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isDarkTheme = !isDarkTheme;
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});
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},
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icon: Icon(isDarkTheme ? Icons.wb_sunny : Icons.nightlight_round),
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label: const Text('Switch Theme Mode'),
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),
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],
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),
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),
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),
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);
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}
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}
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