Enum A11yMode 

pub enum A11yMode {
    Cooperative,
    StrictlyParallel,
}

AT-emission strategy for SceneView. Decides whether items / widgets that have not been placed in the app-declared logical tree appear in the AT tree by default, or are suppressed.

Pick Cooperative when the visual scene layout is a sensible AT structure for your app (charts, dashboards, simple maps). Pick StrictlyParallel when AT shape diverges meaningfully from visual layout — story corkboards (Acts → Scene cards), node-graph editors (Subgraphs → Nodes → Ports), CAD canvases (Layers → Components). Apps in this category typically declare every AT edge anyway, so the default visual-emission becomes noise.

Variants

Cooperative

Default. Visual is the AT structure unless overridden. Items inside the off-screen-mode policy emit as direct AT children of SceneView (or their declared logical parent if set_a11y_parent placed them). Heavyweight widgets emit through the arena walker as natural descendants of SceneView. The logical-tree machinery layers on top.

StrictlyParallel

AT structure is purely declared. Items are emitted only if the app placed them in the logical tree via Scene::set_a11y_parent. Heavyweight widgets still emit (they own focus / interaction state the AT layer can’t suppress) but their parent in the AT tree is the declared logical parent if any, else SceneView itself.

Use this when your app’s AT shape is fundamentally different from its visual layout — declaring every node once is cheaper than overriding the visual default for every node.

Trait Implementations

impl Clone for A11yMode

fn clone(&self) -> A11yMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for A11yMode

impl Debug for A11yMode

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

Formats the value using the given formatter.

impl Default for A11yMode

fn default() -> A11yMode

Returns the “default value” for a type.

impl Eq for A11yMode

impl PartialEq for A11yMode

fn eq(&self, other: &A11yMode) -> 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.

impl StructuralPartialEq for A11yMode