Info Label Basic

info_label_basic.kt

@Composable
fun InfoLabels(
    modifier: Modifier = Modifier,
    content: @Composable () -> Unit,
) {
    // 1
    Layout(
        content = content,
        modifier = modifier,
    ) { measurables, constraints ->
        // 2
        require(measurables.size % 2 == 0) { "InfoLabels requires an even number of children" }
        // 3
        val looseConstraints = constraints.copy(
            minWidth = 0,
            minHeight = 0,
        )
        // 4
        val placeables = measurables.map { measurable ->
            measurable.measure(looseConstraints)
        }
        // 5
        val labels = List(placeables.size / 2) { index ->
            placeables[2 * index]
        }
        // 6
        val descriptions = List(placeables.size / 2) { index ->
            placeables[2 * index + 1]
        }
        // 7
        val maxLabelWidth = labels.maxByOrNull { it.width }?.width ?: 0
        // 8
        val height = List(labels.size) { index ->
            max(labels[index].height, descriptions[index].height)
        }.sum()
        // 9
        layout(
            constraints.maxWidth,
            height.coerceAtMost(constraints.maxHeight)
        ) {
            var yPosition = 0
            // 10
            for (i in labels.indices) {
                val label = labels[i]
                val description = descriptions[i]
                // 11
                val cellHeight = max(label.height, description.height)
                // 12
                label.place(x = 0, y = yPosition)
                // 13
                description.place(x = maxLabelWidth, y = yPosition)
                // 14
                yPosition += cellHeight
            }
        }
    }
}