PieChart.kt

@Composable
@Preview(showBackground = true, showSystemUi = true)
fun PieChart(
    items: List<Item> = sampleItems
) {

    Box(
        modifier = Modifier.fillMaxSize(),
        contentAlignment = Alignment.Center
    ) {

        val total = items.sumOf { it.value.toDouble() }.toFloat()


        val sweepAngles = remember {
            items.map {
                Animatable(0f)
            }
        }

        LaunchedEffect(Unit) {
            for (i in items.indices) {
                sweepAngles[i].animateTo(
                    targetValue = ((items[i].value / total) * 360f),
                    animationSpec = tween(
                        easing = FastOutSlowInEasing
                    )
                )
            }

        }
        Canvas(
            modifier = Modifier
                .size(300.dp)

        ) {
            var startAngle = -90f
            for (i in items.indices) {
                //val sweepAngle = ((items[currentItem].value / total) * 360f).toFloat()
                val sweepAngle = sweepAngles[i].value
                drawArc(
                    startAngle = startAngle,
                    sweepAngle = sweepAngle,
                    color = items[i].color,
                    useCenter = true
                )
                startAngle += sweepAngle
            }


        }

    }
}