Module runtime 

Structs

ComposeGuard

Composer

FocusManager

A manager for programmatic focus navigation.

FocusRequester

A handle that can programmatically request focus for a widget.

Frame

Frame - output of composition for a tick: scene + input/semantics.

HitRegion

Hit-test region in physical pixels (rect carries px magnitudes, like Compose Rect).

Scheduler

SchedulerScopeGuard

RAII guard from Scheduler::scope_guard. Pops the scope on drop.

SchedulerScopeGuardRaw

Panic-safe scope guard that does NOT hold a borrow across the body.

SemNode

Flattened semantics node produced by layout_and_paint.

Enums

FocusDirection

Direction for focus movement.

Constants

CLEAR_FOCUS_MARKER

COMPOSER

Functions

drain_focus_requests

Drain all queued focus requests in FIFO order.

focus_group_chain

Sub-chain of ids sharing the focused element’s focus group. Returns None when focus is outside any group (full chain applies). Tab and spatial navigation both scope to this so modals trap focus.

keyed

remember

Slot-based remember (sequential composition only). This prevents state aliasing when the composition tree structure changes between frames

remember_auto

Auto-keyed variant of remember: identity is the call site plus an occurrence index, so state follows a composition position, not an item. Only safe where the number of calls at this site is fixed across frames — list items and conditional branches need remember_with_key.

remember_state

Raw slot state (Rc<RefCell<T>>). Writes via borrow_mut() don’t request a frame - prefer [remember_mutable] if a write must always recompose.

remember_state_auto

Auto-keyed variant of remember_state. Same positional caveat as remember_auto and the same no-frame-on-write caveat as remember_state.

remember_state_with_key

Key-based variant of remember_state. Same no-frame-on-write caveat.

remember_with_key

Key-based remember.

shutdown_composition

Dispose the root composition scope and clear all composer caches.

spatial_focus_next

Find the next focusable element in a given spatial direction.

take_focus_request

unique_component_id

Returns a fresh unique component id. See [COMPONENT_ID].