Struct ZStackLayout 

pub struct ZStackLayout {
    pub alignment: Alignment,
}

Stacks an arbitrary number of children with a shared alignment.

ZStackLayout positions every child within the same bounds, overlaying them according to the specified alignment. Each child is sized independently, and the container’s final width/height are the maxima of the children’s reported sizes. If you instead need the base child to dictate the container size while layering secondary content, see crate::overlay::OverlayLayout.

Fields

alignment: Alignment

The alignment used to position children within the ZStack

Trait Implementations

impl Clone for ZStackLayout

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ZStackLayout

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ZStackLayout

fn default() -> Self

Returns the “default value” for a type.

impl Layout for ZStackLayout

fn stretch_axis(&self, children: &[StretchAxis]) -> StretchAxis

A ZStack is content-sized only while every child is — a child that stretches (a Color, a GpuSurface) makes the stack stretch on the same axes, since place hands such children the full bounds.

Axis-relative answers have no direction to resolve against here: MainAxis children (Spacer) want whatever space is offered, which in a zstack is both axes; CrossAxis children (Divider) resolve to their default orientation — a horizontal rule — and fill horizontally.

fn size_that_fits( &self, proposal: ProposalSize, children: &[&dyn SubView], ) -> Size

Calculate the size this layout wants given a proposal.

fn place( &self, bounds: Rect, _proposal: ProposalSize, children: &[&dyn SubView], ) -> Vec<SubviewPlacement>

Place children within the given bounds.

fn explicit_horizontal( &self, alignment: HorizontalAlignment, _bounds: Rect, children: &[PlacedSubview<'_>], ) -> Option<f32>

Returns an explicit horizontal guide for this container, if any.

fn explicit_vertical( &self, alignment: VerticalAlignment, _bounds: Rect, children: &[PlacedSubview<'_>], ) -> Option<f32>

Returns an explicit vertical guide for this container, if any.

fn explicit_horizontal_alignments(&self) -> Vec<HorizontalAlignment>

Returns the horizontal alignments this container may expose explicitly.

fn explicit_vertical_alignments(&self) -> Vec<VerticalAlignment>

Returns the vertical alignments this container may expose explicitly.