Rating Bar Jetpack Compose with onClick Handler

RatingBar.kt

@Composable
fun RatingBar(
    rating: Float,
    onChange: (Int, Float) -> Unit,
    max: Int
) {
    Row {
        val value = rating * max
        val fullStar = value.toInt()
        var fractionStar = value - fullStar
        repeat(max) { index ->
            val fraction = if (index < fullStar) 1F else {
                val fraction = fractionStar
                fractionStar = 0F
                fraction
            }
            Star(
                fraction = fraction,
                onClick = { onChange(index, (index + 1F) / max) }
            )
        }
    }
}

@Composable
fun Star(
    modifier: Modifier = Modifier,
    fraction: Float,
    color: Color = Color.Yellow,
    onClick: () -> Unit,
    size: Dp = 24.dp
) {
    Box(
        modifier = modifier
            .size(size)
            .clip(StarShape)
            .clickable(onClick = onClick)
            .border(width = 1.dp, shape = StarShape, color = color)
            .drawBehind {
                val width = this.size.width
                val height = this.size.height
                drawRect(
                    color = color,
                    size = Size(
                        width = fraction * width,
                        height = height
                    )
                )
            }
    )
}

private val StarShape = GenericShape { size, _ ->
    moveTo(12.0f / 24 * size.width, 17.27f / 24 * size.height)
    lineTo(18.18f / 24 * size.width, 21.0f / 24 * size.height)
    relativeLineTo(-1.64f / 24 * size.width, -7.03f / 24 * size.height)
    lineTo(22.0f / 24 * size.width, 9.24f / 24 * size.height)
    relativeLineTo(-7.19f / 24 * size.width, -0.61f / 24 * size.height)
    lineTo(12.0f / 24 * size.width, 2.0f / 24 * size.height)
    lineTo(9.19f / 24 * size.width, 8.63f / 24 * size.height)
    lineTo(2.0f / 24 * size.width, 9.24f / 24 * size.height)
    relativeLineTo(5.46f / 24 * size.width, 4.73f / 24 * size.height)
    lineTo(5.82f / 24 * size.width, 21.0f / 24 * size.height)
    close()
}