Struct SubsecondDot 

pub struct SubsecondDot {
    pub orbit_radius: f32,
    pub dot_radius: f32,
    pub color: Color,
}

Sub-second indicator: a small disc orbiting the face center at the sub-second fractional rate. Completes one full orbit per wall-clock second, giving visible per-frame motion at 30 Hz / 60 Hz tick rates — useful for confirming the driver is delivering target times to the widget on time, and for visualising end-to-end render pipeline latency.

Fields

orbit_radius: f32

Orbit radius as a fraction of face radius (typical 0.4..=0.7).

dot_radius: f32

Dot radius as a fraction of face radius (typical 0.015..=0.04).

color: Color

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

Implementations

impl SubsecondDot

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

Default dot at 65% orbit radius, 2% dot radius.

Trait Implementations

impl ClockLayer for SubsecondDot

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.