Struct KnobValues 

pub struct KnobValues { /* private fields */ }

Runtime container of one Signal<T> per declared knob, populated from a KnobSpec and an optional set of variant overrides.

Construct once per (widget, variant) selection in the previewer; pass by reference to WidgetCatalog::build. The widget reads each knob’s signal via the typed accessor methods (bool_("disabled"), …) and threads it into the constructed widget through Prop::Bound.

All accessors return a Signal<T> clone. Cheap — Signal<T> is Rc-backed.

Implementations

impl KnobValues

pub fn from_spec(spec: &KnobSpec, overrides: Option<&KnobOverrides>) -> Self

Build a fresh runtime view for a spec, applying optional variant overrides on top of each knob’s declared default.

pub fn bool_(&self, id: &str) -> Signal<bool>

pub fn opt_bool(&self, id: &str) -> Signal<Option<bool>>

pub fn i32_(&self, id: &str) -> Signal<i32>

pub fn opt_i32(&self, id: &str) -> Signal<Option<i32>>

pub fn f32_(&self, id: &str) -> Signal<f32>

pub fn opt_f32(&self, id: &str) -> Signal<Option<f32>>

pub fn text(&self, id: &str) -> Signal<String>

pub fn opt_text(&self, id: &str) -> Signal<Option<String>>

pub fn choice(&self, id: &str) -> Signal<usize>

pub fn enum_(&self, id: &str) -> Signal<usize>

Enum knobs share the Choice storage (a usize index); alias of choice that reads clearer at enum build sites.

pub fn text_role(&self, id: &str) -> Signal<TextRole>

pub fn surface_role(&self, id: &str) -> Signal<SurfaceRole>

pub fn border_role(&self, id: &str) -> Signal<BorderRole>

pub fn text_style(&self, id: &str) -> Signal<TextStyleRole>

pub fn bind_all( &self, widget_id: WidgetId, registry: &BindingRegistry, level: BindingLevel, )

Bind every knob signal to widget_id at the given level via the supplied registry. Used by the canvas to force a rebuild whenever any knob mutates — many widgets read knob values once at construction time (no Prop::Bound for every property) so the catch-all is a rebuild on each change.

Trait Implementations

impl Clone for KnobValues

fn clone(&self) -> KnobValues

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KnobValues

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

Formats the value using the given formatter.