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>
87 lines
2.4 KiB
Dart
87 lines
2.4 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 _MultiplyPainter extends CustomPainter {
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_MultiplyPainter(this._color);
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final Color _color;
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@override
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void paint(Canvas canvas, Size size) {
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const int xDenominator = 2;
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const int yDenominator = 10;
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final double width = size.width / xDenominator;
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final double height = size.height / yDenominator;
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for (int y = 0; y < yDenominator; y++) {
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for (int x = 0; x < xDenominator; x++) {
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final Rect rect = Offset(x * width, y * height) & Size(width, height);
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final Paint basePaint =
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Paint()
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..color = Color.fromARGB(
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(((x + 1) * width) / size.width * 255.0).floor(),
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(((y + 1) * height) / size.height * 255.0).floor(),
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255,
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127,
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);
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canvas.drawRect(rect, basePaint);
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final Paint multiplyPaint =
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Paint()
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..color = _color
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..blendMode = BlendMode.multiply;
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canvas.drawRect(rect, multiplyPaint);
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}
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}
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}
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@override
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bool shouldRepaint(CustomPainter oldDelegate) {
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return true;
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}
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}
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class AnimatedAdvancedBlend extends StatefulWidget {
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const AnimatedAdvancedBlend({super.key});
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@override
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State<AnimatedAdvancedBlend> createState() => _AnimatedAdvancedBlendState();
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}
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class _AnimatedAdvancedBlendState extends State<AnimatedAdvancedBlend>
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with SingleTickerProviderStateMixin {
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late final AnimationController controller = AnimationController(
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vsync: this,
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duration: const Duration(milliseconds: 5000),
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);
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late final Animation<double> animation = controller.drive(Tween<double>(begin: 0.0, end: 1.0));
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Color _color = const Color.fromARGB(255, 255, 0, 255);
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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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animation.addListener(() {
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setState(() {
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_color = Color.fromARGB((animation.value * 255).floor(), 255, 0, 255);
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});
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});
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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(body: CustomPaint(painter: _MultiplyPainter(_color), child: Container())),
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);
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}
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}
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