Struct TuiReadoutBinder 

pub struct TuiReadoutBinder { /* private fields */ }

Stateful runtime adapter for the TUI surface (SRD-63 §7).

Wraps a DefaultBinder with three pieces of interactive state:

• Focus index — which baked body in each slot is currently “selected” by the user. The focused body’s render emits with LayoutHint::Focused(...) so the sink can apply visual emphasis (offset, background tint).
• Per-(slot, body) LOD overrides — keystrokes cycle the focused body’s LOD up / down; the binder applies overrides on top of the body’s baked LOD.
• Overlay-held flag — while true, every render fires with ContentMode::Explanation instead of Value. Driven by a held key on the surface.

The binder forwards fire through to its inner DefaultBinder for actual rendering, then post- processes by applying the focus / LOD / overlay state via a wrapping render walk.

Construction is the same as a default binder — same slot bindings — but the surface keeps a long-lived instance so state survives across event fires.

Implementations

impl TuiReadoutBinder

pub fn new() -> Self

pub fn from_default(inner: DefaultBinder) -> Self

Construct from an existing DefaultBinder. Used by the activity-init plumbing — build the bindings via the standard layered resolver, then wrap in the stateful TUI binder for the live surface.

pub fn bind(&mut self, event: EventType, body: BakedBody)

pub fn slot_len(&self, event: EventType) -> usize

pub fn focus_for(&self, event: EventType) -> Option<usize>

Read the current focus index for a slot. Returns Some(i) when a body in event’s list is focused; None when the slot has no bodies or focus is inactive.

pub fn overlay_held(&self) -> bool

Read the active overlay-held flag. Visible to the surface so it can render an “explanation overlay active” affordance in chrome.

pub fn lod_override(&self, event: EventType, idx: usize) -> Option<Lod>

Read the LOD override for a (slot, body_index) pair, if any.

Trait Implementations

impl Default for TuiReadoutBinder

fn default() -> Self

Returns the “default value” for a type.

impl ReadoutBinder for TuiReadoutBinder

fn fire( &mut self, event: EventType, ctx: &dyn ReadoutContext, sink: &mut dyn ReadoutSink, )

Drive every readout bound to event. The binder applies its interactive state, walks the resolved list, and emits render steps to sink.

fn on_key(&mut self, key: BinderKey)

Forward a keyboard event from the surface. Default no-op for non-interactive sinks.