Module collapse 

Collapse — a wrapper widget that animates its child between hidden and natural size when an external Signal<bool> toggles.

Drives a progress: Signal<f32> ∈ [0, 1] (0 = collapsed, 1 = expanded) and reports its own size as (natural_w, natural_h * progress) while the child lays out at full natural size — the framework’s clip pass crops the overflow. This keeps the animation visible across the whole duration, instead of compressing the visible portion into the final few milliseconds (which is what happened when an animated MaxSize::max_height slid against a 10000-px sentinel that vastly overshot the child’s natural height).

let expanded = ctx.signal(false);
ctx.add(Collapse::new(expanded.clone()).child(advanced_settings));
// ...elsewhere:
expanded.set(true);  // animates open over `motion.duration_collapse`

Honors prefers-reduced-motion: under reduced motion, progress snaps to its end value instead of tweening.

Structs

Collapse

Wraps a child and animates it between hidden (progress=0) and natural size (progress=1), driven by an external Signal<bool>.