Struct CenterCap 

pub struct CenterCap {
    pub radius: f32,
    pub color: Color,
}

Filled circular cap at the face center, drawn on top of the hands to hide the small visual gap where the three hand pivots meet. Static after first paint; the same union-expansion pass that protects tick marks ensures pristine restore covers the cap before any blend.

Fields

radius: f32

Cap radius as a fraction of face radius (typical 0.03..=0.06).

color: Color

Cap color (alpha modulated by AA coverage at edges).

Implementations

impl CenterCap

pub const fn standard(color: Color) -> Self

Default cap sized to comfortably cover the typical pivot region.

Trait Implementations

impl ClockLayer for CenterCap

fn bbox(&self, _state: &ClockState, bounds: Rect) -> Rect

Pixels this layer might write at state, in absolute framebuffer coordinates. Used for cross-layer dirty union math.

fn dirty( &self, prev: Option<&ClockState>, state: &ClockState, bounds: Rect, ) -> Rect

Self-induced dirty between prev and state. An empty rect means “I have not changed”; the compositor will still call paint if another layer’s dirty rect intersects this layer’s bbox.

fn paint(&self, renderer: &mut dyn Renderer, _state: &ClockState, bounds: Rect)

Paint this layer at state. Layers must paint within their declared bbox — the compositor relies on that for dirty-rect correctness.