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layout

Functions summary

Modifier

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

Functions

Modifier.layout

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

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.

Example usage:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.layout.layout
import androidx.compose.ui.unit.offset

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))
}
See also
LayoutModifier
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