rating_bar.dart

import 'package:myapp/src/values/colors.dart';
import 'package:flutter/material.dart';

class RatingBar extends StatefulWidget {
  final double rating;
  final bool makeRating;
  final double? size;

  final Function(double rating)? makeRatingCallback;

  const RatingBar(
      {Key? key,
      required this.rating,
      this.makeRating = false,
      this.makeRatingCallback, this.size})
      : super(key: key);

  @override
  _RatingBarState createState() => _RatingBarState();
}

class _RatingBarState extends State<RatingBar> {

  late double selectedRating = widget.rating;

  @override
  Widget build(BuildContext context) {
    return Row(
      mainAxisAlignment: MainAxisAlignment.start,
      children: new List<Widget>.generate(5, (index) {
        if (widget.makeRating) {
          return IconButton(
              padding: EdgeInsets.zero,
              iconSize: 30,
              splashRadius: 2,
              onPressed: () {
                double newRating = index.toDouble() + 1;
                setState(() {
                  selectedRating = newRating;
                });
                widget.makeRatingCallback?.call(selectedRating);
              },
              icon: _buildIcon(index, selectedRating));
        } else {
          return _buildIcon(index, widget.rating);
        }
      }),
    );
  }

  Widget _buildIcon(int index, double rating) {
    return Icon(
        rating.ceil() == (index + 1) && rating != rating.ceil()
            ? Icons.star_half_outlined
            : Icons.star,
        color: rating > index ? MyColors.starSelected : MyColors.starUnSelected,
        size: widget.size != null ? widget.size : widget.makeRating ? 30 : 20);
  }
}