Struct TickMark 

pub struct TickMark {
    pub angle: f32,
    pub outer_radius: f32,
    pub length: f32,
    pub width: f32,
    pub color: Color,
}

Static tick mark on the clock face. Each tick is its own ClockLayer, so a hand sweeping across the face only triggers repaint of the few ticks it crosses, not the whole face. Geometry is expressed as fractions of face radius for size-agnostic scaling.

The angle convention matches the hands: 0 is 12 o’clock; angle increases clockwise.

Fields

angle: f32

Angle in radians; 0 = 12 o’clock, clockwise.

outer_radius: f32

Distance from face center to outer end of the mark, fraction of face radius. 1.0 = exactly at the face edge.

length: f32

Length along the radial direction, fraction of face radius.

width: f32

Width perpendicular to the radial direction, fraction of face radius.

color: Color

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

Trait Implementations

impl ClockLayer for TickMark

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.