Struct OverlayManager 

pub struct OverlayManager { /* private fields */ }

Internal state for all overlays within a single App tree.

The manager does not know about the concrete UI of each overlay type. It only allocates z-index values and tracks basic metadata so that visual layers can be rendered in a stable order.

Implementations

impl OverlayManager

pub fn open( &mut self, kind: OverlayKind, has_mask: bool, ) -> (OverlayKey, OverlayMeta)

Open a new overlay of the given kind.

Returns the allocated key together with the computed metadata so the caller can immediately use the z-index.

pub fn update( &mut self, key: OverlayKey, has_mask: Option<bool>, ) -> Option<OverlayMeta>

Update a subset of the metadata for an existing overlay.

pub fn close(&mut self, key: OverlayKey)

Close a single overlay.

pub fn close_all(&mut self)

Close all overlays managed by this instance.

pub fn entries(&self) -> impl Iterator<Item = (&OverlayKey, &OverlayMeta)>

Return an iterator over all active overlays. The order of iteration is not guaranteed to be stable; callers that care about z-index ordering should sort by z_index.

pub fn current_top_z_index(&self) -> i32

Return the highest z-index currently allocated, or the base value if there are no overlays.

Trait Implementations

impl Clone for OverlayManager

fn clone(&self) -> OverlayManager

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OverlayManager

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

Formats the value using the given formatter.

impl Default for OverlayManager

fn default() -> Self

Returns the “default value” for a type.