layout

Modifier in Compose Ui

Creates a [LayoutModifier] that allows changing how the wrapped element is measured and laid out.

This is a convenience API of creating a custom [LayoutModifier] modifier, without having to create a class or an object that implements the [LayoutModifier] interface. The intrinsic measurements follow the default logic provided by the [LayoutModifier].

Last updated: 2024-10-22 13:47

Installation

dependencies {
   implementation("androidx.compose.ui:ui:1.8.0-alpha04")
}

Overloads

fun Modifier.layout(measure: MeasureScope.(Measurable, Constraints) -> MeasureResult)

Code Example

ConvenienceLayoutModifierSample

@Composable
fun ConvenienceLayoutModifierSample() {
    Box(
        Modifier.background(Color.Gray).layout { measurable, constraints ->
            // an example modifier that adds 50 pixels of vertical padding.
            val padding = 50
            val placeable = measurable.measure(constraints.offset(vertical = -padding))
            layout(placeable.width, placeable.height + padding) {
                placeable.placeRelative(0, padding)
            }
        }
    ) {
        Box(Modifier.fillMaxSize().background(Color.DarkGray))
    }
}