tablet-app/lib/Components/loading_common.dart

import 'package:flutter/material.dart';
import 'package:tablet_app/constants.dart';

class LoadingCommon extends StatefulWidget {
  const LoadingCommon({Key? key}) : super(key: key);

  @override
  State<LoadingCommon> createState() => _LoadingCommonState();
}

class _LoadingCommonState extends State<LoadingCommon> with TickerProviderStateMixin {
  AnimationController? _controller;

  @override
  void initState() {
    _controller = AnimationController(
      duration: const Duration(milliseconds: 5000),
      vsync: this,
    )..repeat();
    super.initState();
  }

  @override
  void dispose() {
    _controller!.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    Size size = MediaQuery.of(context).size;
    _controller!.forward(from: 0.0);
    _controller!.addListener(() {
      if (_controller!.isCompleted) {
        _controller!.reverse();
      }
      if(_controller!.isDismissed){
        _controller!.forward();
      }
    });
    return Center(
      child: RotationTransition(
        turns: Tween(begin: 0.0, end: 3.0).animate(_controller!),
        child: Icon(Icons.museum_outlined, color: kTestSecondColor, size: size.height*0.1),
      ),
    );
  }
}