litho-core/com.facebook.litho.layout/PlacementScope

PlacementScope

Receiver for the placement pass.

A child that is never placed occupies no space and will not be mounted. Declining to place is therefore how a container drops a child: measuring one to see whether it fits and then leaving it out costs its subtree nothing.

Properties

layoutDirection

val layoutDirection: LayoutDirection

The direction the container is laid out in.

Functions

place

fun Placeable.place(x: Int = 0, y: Int = 0)

Position this child at x, y relative to this container's top-left.

placeRelative

fun Placeable.placeRelative(start: Int = 0, top: Int = 0)

Position this child at start from this container's start edge and top from its top, so a right-to-left container mirrors it: the left edge in left-to-right, the right edge in right-to-left, against the width this container declared.

toPixels

fun Dimen.toPixels(): Int

This dimension in pixels, as the container's resources resolve it.