Struct RectRefresh 

pub struct RectRefresh { /* private fields */ }

A payload-type-erased “re-measure your zones” channel, shared by every registry under one provider tree.

Cached client rects go stale the moment layout moves under a live drag - scrolling being the everyday case. Registries are per payload type, but the things that move layout (an auto-scrolling container, your own scroll surface, a collapsing panel) shouldn’t need to know any payload type to say “geometry changed”. Each provider registers a thunk here that re-measures its own registry only while it has a drag in flight, so pinging the channel from every scroll event costs nothing while idle.

crate::autoscroll::AutoScroll pings this automatically after every scroll it performs (and on any other scroll of its container); grab the channel with crate::core::hooks::use_rect_refresh to wire up custom layout mutators.

Implementations

impl RectRefresh

pub fn from_signal(thunks: Signal<Vec<(u64, Callback<()>)>>) -> Self

Wrap an existing signal. Prefer crate::core::hooks::use_dnd_provider, which creates one per provider tree (nested providers inherit and re-provide the outermost channel).

pub fn refresh_all(&self)

Ask every provider in the tree to re-measure its zones. Providers without a drag in flight ignore the ping, so this is safe to call from high-frequency sources like scroll events.

pub fn len(&self) -> usize

Number of registered providers. Diagnostics and tests.

pub fn is_empty(&self) -> bool

Whether any provider is registered.

Trait Implementations

impl Clone for RectRefresh

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RectRefresh

impl PartialEq for RectRefresh

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.