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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/material.dart';
/// Flutter code sample for [RotationTransition].
void main() => runApp(const RotationTransitionExampleApp());
class RotationTransitionExampleApp extends StatelessWidget {
const RotationTransitionExampleApp({super.key});
@override
Widget build(BuildContext context) {
return const MaterialApp(
home: RotationTransitionExample(),
);
}
}
class RotationTransitionExample extends StatefulWidget {
const RotationTransitionExample({super.key});
@override
State<RotationTransitionExample> createState() => _RotationTransitionExampleState();
}
/// [AnimationController]s can be created with `vsync: this` because of
/// [TickerProviderStateMixin].
class _RotationTransitionExampleState extends State<RotationTransitionExample> with TickerProviderStateMixin {
late final AnimationController _controller = AnimationController(
duration: const Duration(seconds: 2),
vsync: this,
)..repeat(reverse: true);
late final Animation<double> _animation = CurvedAnimation(
parent: _controller,
curve: Curves.elasticOut,
);
@override
void dispose() {
_controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: RotationTransition(
turns: _animation,
child: const Padding(
padding: EdgeInsets.all(8.0),
child: FlutterLogo(size: 150.0),
),
),
),
);
}
}