animatedbuilder.dart

import 'package:flutter/material.dart';
import 'dart:math' as math;

class AnimatedBuilderWidget extends StatefulWidget {
  const AnimatedBuilderWidget({super.key});

  @override
  State<AnimatedBuilderWidget> createState() => _AnimatedBuilderWidgetState();
}

class _AnimatedBuilderWidgetState extends State<AnimatedBuilderWidget>
    with TickerProviderStateMixin {
  late final AnimationController _controller =
      AnimationController(duration: const Duration(seconds: 10), vsync: this)
        ..repeat();
  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Animated Builder')),
      body: Center(
        child: AnimatedBuilder(
          animation: _controller,
          builder: (BuildContext context, Widget? child) {
            return Transform.rotate(
              angle: _controller.value * 2 * math.pi,
              child: child,
            );
          },
          child: const FlutterLogo(
            size: 150.0,
          ),
        ),
      ),
    );
  }
}