Module timeline_layout 

Timeline layout helpers shared by time-vs-event UI (tick placement and lane packing).

Structs

IndexedInterval 🔒

TimelineGeometry

Layout + viewport inputs for a timeline (pixels and milliseconds; zoom/pan_ms are clamped by the math).

TimelineMetrics

Derived pixel/time geometry for one render of a timeline.

TimelineViewport

A timeline viewport: the committed pan offset and zoom factor.

Constants

DEFAULT_TARGET_PIXELS_PER_TICK

Target pixel gap between adjacent ticks when no caller preference is set.

FALLBACK_STEP_MS 🔒

NICE_STEPS_MS 🔒

Functions

assign_timeline_lanes

Pack (start, end) intervals into non-overlapping lanes via greedy scheduling, returning lanes in input order.

clamp 🔒

compute_timeline_metrics

Derive all pixel/time geometry (including axis ticks) for one timeline render; the source of truth for px<->ms.

compute_timeline_ticks

Pick “nice” tick positions (ms) inside [0, duration_ms] for a timeline axis.

normalized_interval 🔒

pan_timeline_by

Compute the new viewport after dragging the track by delta_px pixels (zoom unchanged).

reserve_lane 🔒

zoom_timeline_at

Compute the new viewport after a cursor-anchored zoom step (local_x pixels from the track left, cursor time fixed).