Struct OverlayLayout 

pub struct OverlayLayout {
    pub align: Alignment,
    pub size_to_first: bool,
}

Z-layering (§overlay): children share the container bounds, stacked back-to-front in child order (first child = bottom of the z-order), each positioned by a single Alignment. size_to_first reports only the first child’s natural size, the badge/annotation sizing of overlay (the annotation does not grow the frame); otherwise the layout reports the union (max) of all children’s natural sizes, the ZStack sizing of zstack. No native work: the container is the same panel as column/row, so backends stack children by attach order.

Fields

align: Alignment

size_to_first: bool

Trait Implementations

impl Layout for OverlayLayout

fn measure( &self, cx: &mut dyn LayoutOps, children: &[RNode], p: Proposal, ) -> Size

fn place(&self, cx: &mut dyn LayoutOps, children: &[RNode], bounds: Rect)

fn baseline( &self, _cx: &mut dyn LayoutOps, _children: &[RNode], _size: Size, ) -> Option<f64>

Where this node’s own first text baseline falls, measured from the top of a box of size (docs/baseline.md). None (the default) means the node has no baseline to offer, so a baseline-aligned parent falls back to box alignment for it.