mirror of https://github.com/flutter/samples.git
Kevin Moore
6 years ago
committed by
Kevin Moore
parent
de40ba5c0a
commit
7c33a11a7b
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Just a spinning square. That's it. Super exciting.
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Original source on
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[GitHub](https://github.com/flutter/flutter_web/tree/master/examples/spinning_square).
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Before Width: | Height: | Size: 3.2 KiB |
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// Copyright 2018 The Chromium 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 SpinningSquare extends StatefulWidget {
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@override
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_SpinningSquareState createState() => new _SpinningSquareState();
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}
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class _SpinningSquareState extends State<SpinningSquare>
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with SingleTickerProviderStateMixin {
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AnimationController _animation;
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@override
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void initState() {
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super.initState();
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// We use 3600 milliseconds instead of 1800 milliseconds because 0.0 -> 1.0
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// represents an entire turn of the square whereas in the other examples
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// we used 0.0 -> math.pi, which is only half a turn.
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_animation = new AnimationController(
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duration: const Duration(milliseconds: 3600),
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vsync: this,
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)..repeat();
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}
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@override
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Widget build(BuildContext context) {
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return new RotationTransition(
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turns: _animation,
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child: new Container(
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width: 200.0,
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height: 200.0,
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color: const Color(0xFF00FF00),
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));
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}
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@override
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void dispose() {
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_animation.dispose();
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super.dispose();
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}
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}
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void main() {
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runApp(new Center(child: new SpinningSquare()));
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}
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@ -1,43 +0,0 @@
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# Generated by pub
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# See https://dart.dev/tools/pub/glossary#lockfile
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packages:
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collection:
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dependency: transitive
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description:
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name: collection
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url: "https://pub.dartlang.org"
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source: hosted
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version: "1.14.11"
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flutter:
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dependency: "direct main"
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description: flutter
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source: sdk
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version: "0.0.0"
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meta:
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dependency: transitive
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description:
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name: meta
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url: "https://pub.dartlang.org"
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source: hosted
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version: "1.1.8"
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sky_engine:
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dependency: transitive
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description: flutter
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source: sdk
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version: "0.0.99"
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typed_data:
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dependency: transitive
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description:
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name: typed_data
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url: "https://pub.dartlang.org"
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source: hosted
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version: "1.1.6"
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vector_math:
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dependency: transitive
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description:
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name: vector_math
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url: "https://pub.dartlang.org"
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source: hosted
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version: "2.0.8"
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sdks:
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dart: ">=2.2.2 <3.0.0"
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@ -1,11 +0,0 @@
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name: flutter_web.examples.spinning_square
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environment:
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sdk: ">=2.2.0 <3.0.0"
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dependencies:
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flutter:
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sdk: flutter
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flutter:
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assets:
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- preview.png
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@ -1,11 +0,0 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title></title>
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<script defer src="main.dart.js" type="application/javascript"></script>
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</head>
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<body>
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</body>
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</html>
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