chess-dataset-visualiser.kt

object DatasetVisualiser : SquareDecoration {

    @Composable
    override fun render(properties: SquareRenderProperties) {
        ActiveDatasetVisualisation.current.let { viz ->
            val datapoint = viz.dataPointAt(
                properties.position,
                properties.boardProperties.toState
            )

            val percentage = datapoint?.value?.let {
                (1.0f * datapoint.value - viz.minValue) / (viz.maxValue - viz.minValue)
            }?.coerceIn(0f, 1f)

            val interpolatedColor = percentage?.let {
                lerp(datapoint.colorScale.first, datapoint.colorScale.second, percentage)
            }

            val color by animateColorAsState(
                targetValue = interpolatedColor ?: Color.Transparent,
                animationSpec = tween(1500)
            )

            datapoint?.let {
                Box(
                    modifier = properties.sizeModifier
                        .background(color),
                    contentAlignment = Alignment.TopEnd
                ) {
                    datapoint.label?.let {
                        Text(
                            text = datapoint.label,
                            fontSize = 10.sp
                        )
                    }
                }
            }
        }
    }
}