Flutter rotating widget

rotating_animation_widget.dart

/// Continuous rotattion of a widget
/// [widget] - Widget to rotate {required}
/// [duration] - Duration of the rotation (default [Duration(seconds:15)])
import 'package:flutter/material.dart';

class RotatingAnimationWidget extends StatefulWidget {
  final Widget rotatingWidget;
  final Duration duration;
  const RotatingAnimationWidget(this.rotatingWidget, {this.duration}) : assert(rotatingWidget != null);
  _RotatingAnimationWidget createState() => _RotatingAnimationWidget();
}

class _RotatingAnimationWidget extends State<RotatingAnimationWidget> with SingleTickerProviderStateMixin {
  AnimationController _animationController;
  Duration _duration;

  @override
  void initState() {
    super.initState();
    _duration = widget.duration ?? Duration(seconds: 15);
    _animationController = AnimationController(vsync: this, duration: _duration)..repeat();
  }

  @override
  Widget build(BuildContext context) {
    return RotationTransition(
      alignment: Alignment.center,
      turns: _animationController,
      child: widget.rotatingWidget,
    );
  }

  @override
  void dispose() {
    _animationController.dispose();
    super.dispose();
  }
}

Continuous rotating widget

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