Module treemap 

Treemap — weighted rectangles, area ∝ value, laid out by a deterministic slice-and-dice algorithm that alternates split direction by depth-of-cut so the tiling stays readable. The layout (squarify) is a pure function returning (index, Rect) pairs, tested independently of any painter. Tile fills come from a theme-derived sequential Ramp.

Structs

Tile

A labelled, weighted item.

TreemapView

A treemap over a flat list of weighted tiles.

Functions

squarify

Lay weights out into area, area ∝ weight, via squarified slice-and-dice. Returns (original index, rect) for each positive-weight item, in input order. Zero/negative weights are skipped. Pure geometry → directly testable.