dfa3d33328
* [devicelab] track performance of animated image filter * ++ * make animations repeat and add dispose * make duration more consistently 10sec
66 lines
2.0 KiB
Dart
66 lines
2.0 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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// Various tests to verify that Aniamted opacity layers (i.e. FadeTransition) do not
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// dirty children even without explicit repaint boundaries. These intentionally use
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// text to ensure we don't measure the opacity peephole case.
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class AnimatedComplexOpacity extends StatefulWidget {
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const AnimatedComplexOpacity({ super.key });
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@override
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State<AnimatedComplexOpacity> createState() => _AnimatedComplexOpacityState();
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}
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class _AnimatedComplexOpacityState extends State<AnimatedComplexOpacity> with SingleTickerProviderStateMixin {
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late final AnimationController controller = AnimationController(vsync: this, duration: const Duration(milliseconds: 5000));
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late final Animation<double> animation = controller.drive(Tween<double>(begin: 0.0, end: 1.0));
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@override
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void initState() {
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super.initState();
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controller.repeat();
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}
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@override
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void dispose() {
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controller.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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home: Scaffold(
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body: ListView(
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children: <Widget>[
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for (int i = 0; i < 20; i++)
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FadeTransition(opacity: animation, child: Center(
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child: Transform.scale(scale: 1.01, child: const ModeratelyComplexWidget()),
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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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class ModeratelyComplexWidget extends StatelessWidget {
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const ModeratelyComplexWidget({ super.key });
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@override
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Widget build(BuildContext context) {
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return const Material(
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elevation: 10,
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clipBehavior: Clip.hardEdge,
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child: ListTile(
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leading: Icon(Icons.abc, size: 24),
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title: DecoratedBox(decoration: BoxDecoration(color: Colors.red), child: Text('Hello World')),
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trailing: FlutterLogo(),
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),
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);
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}
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}
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