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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>
68 lines
1.6 KiB
Dart
68 lines
1.6 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 AnimationWithMicrotasks extends StatefulWidget {
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const AnimationWithMicrotasks({super.key});
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@override
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State<AnimationWithMicrotasks> createState() => _AnimationWithMicrotasksState();
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}
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class _AnimationWithMicrotasksState extends State<AnimationWithMicrotasks> {
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final _ChunkedWork work = _ChunkedWork();
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@override
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void initState() {
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super.initState();
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work.start();
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}
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@override
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void dispose() {
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work.cancel();
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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 const Scaffold(
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backgroundColor: Colors.grey,
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body: Center(child: SizedBox(width: 200, height: 100, child: LinearProgressIndicator())),
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);
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}
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}
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class _ChunkedWork {
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bool _canceled = false;
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Future<void> start() async {
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// Run 100 pieces of synchronous work.
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// Chunked up to allow frames to be drawn.
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for (int i = 0; i < 100; ++i) {
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_chunkedSynchronousWork();
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}
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}
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void cancel() {
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_canceled = true;
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}
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Future<void> _chunkedSynchronousWork() async {
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while (!_canceled) {
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// Yield to the event loop to let engine draw frames.
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await Future<void>.delayed(Duration.zero);
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// Perform synchronous computation for 1 ms.
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_syncComputationFor(const Duration(milliseconds: 1));
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}
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}
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void _syncComputationFor(Duration duration) {
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final Stopwatch sw = Stopwatch()..start();
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while (!_canceled && sw.elapsed < duration) {}
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}
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}
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