Struct ActivityBarRowHit 

pub struct ActivityBarRowHit {
    pub y_start: f32,
    pub y_end: f32,
    pub id: WidgetId,
    pub tooltip: String,
}

Per-row hit region produced by the rasteriser, carrying the item’s WidgetId and tooltip alongside the painted vertical span. Apps that need both click routing AND hover tooltips (e.g. vimcode’s GTK activity bar with connect_query_tooltip) read from this list rather than re-resolving via the layout.

Coordinate space — relative to the bar

y_start / y_end are measured from the top edge of the rect passed to [Backend::draw_activity_bar], i.e. the first row always starts at 0.0 regardless of where the bar sits on screen. They are not target-surface (absolute) coordinates — this is the opposite convention from [TabBarHits], whose x spans are absolute.

Callers therefore add the bar’s origin themselves before comparing against a raw click position:

let hit_top = hit.y_start as f32 + activity_bar_bounds.y;

Coordinates here are bar-relative offsets, not absolute paint y values. Each backend’s activity_bar module doc spells out its conversion. Callers add the bar origin before hit-testing.

Fields

y_start: f32

Top edge of the row, relative to the bar’s rect.y (first row is 0.0). Add the bar origin before hit-testing a click.

y_end: f32

Bottom edge (exclusive) of the row, relative to the bar’s rect.y. Add the bar origin before hit-testing a click.

id: WidgetId

tooltip: String

Trait Implementations

impl Clone for ActivityBarRowHit

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ActivityBarRowHit

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

Formats the value using the given formatter.