Struct AspectRatioLayout 

pub struct AspectRatioLayout {
    pub ratio: f64,
}

The aspect_ratio decorator (§5.2): the largest width / height == ratio box that fits what the parent proposes, with the child given that whole box.

With one axis proposed it derives the other, which is what makes .grow_w().aspect_ratio(r) take the width a container offers and compute the height from it: a canvas that keeps its proportions as the window resizes.

Fields

ratio: f64

Trait Implementations

impl Layout for AspectRatioLayout

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.