CoordinatedScrollCase13.kt

@Composable
internal fun TopBarCollapsing(
    currentOffset: Float,
    maxOffset: Float,
    modifier: Modifier = Modifier,
    onHeightCalculated: (Float) -> Unit
) {
    val alpha = (abs(currentOffset) / maxOffset).pow(0.75f)

    Column(
        modifier = modifier
            .offset { IntOffset(x = 0, y = currentOffset.roundToInt()) }
            .background(Color.Blue)
            .padding(start = 16.dp)
            .onGloballyPositioned {
                onHeightCalculated(it.size.height.toFloat())
            }
    ) {
        Text(
            text = "Some text 1",
            color = Color.White,
            modifier = Modifier.alpha(1f - alpha).padding(top = 8.dp)
        )
...
    }
}