40 lines
1.1 KiB
Dart
40 lines
1.1 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/widgets.dart';
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class SpinningSquare extends StatefulWidget {
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const SpinningSquare({super.key});
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@override
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State<SpinningSquare> createState() => _SpinningSquareState();
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}
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class _SpinningSquareState extends State<SpinningSquare> with SingleTickerProviderStateMixin {
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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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late final AnimationController _animation = 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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@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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@override
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Widget build(BuildContext context) {
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return RotationTransition(
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turns: _animation,
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child: Container(width: 200.0, height: 200.0, color: const Color(0xFF00FF00)),
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);
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}
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}
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void main() {
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runApp(const Center(child: SpinningSquare()));
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}
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