5491c8c146
This auto-formats all *.dart files in the repository outside of the `engine` subdirectory and enforces that these files stay formatted with a presubmit check. **Reviewers:** Please carefully review all the commits except for the one titled "formatted". The "formatted" commit was auto-generated by running `dev/tools/format.sh -a -f`. The other commits were hand-crafted to prepare the repo for the formatting change. I recommend reviewing the commits one-by-one via the "Commits" tab and avoiding Github's "Files changed" tab as it will likely slow down your browser because of the size of this PR. --------- Co-authored-by: Kate Lovett <katelovett@google.com> Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
63 lines
1.8 KiB
Dart
63 lines
1.8 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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class CullOpacityPage extends StatefulWidget {
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const CullOpacityPage({super.key});
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@override
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State<StatefulWidget> createState() => _CullOpacityPageState();
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}
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class _CullOpacityPageState extends State<CullOpacityPage> with SingleTickerProviderStateMixin {
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late Animation<double> _offsetY;
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late AnimationController _controller;
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@override
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void initState() {
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super.initState();
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_controller = AnimationController(vsync: this, duration: const Duration(seconds: 2));
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// Animations are typically implemented using the AnimatedBuilder widget.
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// This code uses a manual listener for historical reasons and will remain
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// in order to preserve compatibility with the history of measurements for
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// this benchmark.
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_offsetY = Tween<double>(begin: 0, end: -1000.0).animate(_controller)..addListener(() {
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setState(() {});
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});
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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 Stack(
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children: List<Widget>.generate(
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50,
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(int i) => Positioned(
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left: 0,
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top: (200 * i).toDouble() + _offsetY.value,
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child: Opacity(
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opacity: 0.5,
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child: RepaintBoundary(
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child: Container(
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// Slightly change width to invalidate raster cache.
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width: 1000 - (_offsetY.value / 100),
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height: 100,
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color: Colors.red,
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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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