Class TimeScale

Choose bar spacing so barCount bars fit the width, anchored at the right edge.

Alias of visibleRange() for naming parity with common charting APIs.

Logical index → x (media px), bar center.

Pan by a pixel delta. Positive dx drags chart content to the right (revealing older bars), matching a natural left-button drag.

Logical index of the latest bar; the right edge anchors to baseIndex+rightOffset.

Repaint hook injected by the host chart, fired after setVisibleLogicalRange.

Set the visible logical range (best effort): pick a bar spacing so the span fills the width and anchor the right edge at range.to. Bar spacing is clamped to [min,max], so an extreme span lands at the nearest zoom. Fires the change handler so a host that mutates the scale directly still repaints.

Currently visible logical index range (fractional, unclamped to data).

x (media px) → fractional logical index.

Zoom around an anchor x (the cursor): change bar spacing by factor while keeping whatever logical index sits under focusX pinned there. factor > 1 zooms in (wider bars).