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struct ContentViews: View {

  @State var imageWidth: CGFloat = 0
  @State var imageHeight: CGFloat = 0

  @State private var rotationAngle: Double = 0
  @State private var wdt: Double = 0
  @State private var hgt: Double = 0
  @State private var cropRect = CGRect(x: 0, y: 0, width: 200, height: 200)
  @State var image: UIImage

alwerr

import 'package:flutter/material.dart';

import 'dart:math';

class MyWidget extends StatelessWidget {
  const MyWidget({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(

alwerr

import 'dart:math';

import 'package:flutter/material.dart';
import 'package:flutter/physics.dart';

main() {
  runApp(MaterialApp(home: Scaffold(body: ColorWheel())));
}

typedef RangeRecord = ({int index, double begin, double end, double turn});