Module layout 

Structs

ChartArea

DataArea

Margins

Rect

RectF

Float-precision pixel rect — element bounds, selection boxes, and other sub-pixel screen geometry. Rect (u32) stays the type for buffer/texture areas; this one is for visual geometry derived from f32 layout math.

TitleBand

The margin geometry an axis title is placed inside.

TitlePlacement

Draw origin and optional rotation for a chart or axis title.

Enums

Element

FitStrategy

LayoutError

NudgeReject

NudgeResult

Side

A chart edge. Serializable because ColorBarOptions::side is part of Config; the layout-internal uses (FitStrategy::Absorb, nudge) predate that and are unaffected.

Constants

LABEL_GAP

Minimum gap between a tick end and its label, in pixels.

LEGEND_INSET

Inset between a legend box and its data-area corner, in pixels.

MIN_VISIBLE_DATA_AREA_PX

How much of the data area, in pixels along each axis, must stay inside the chart area when margins push it past the chart edges, so its selection box and resize handles remain reachable.

Functions

axis_anchor

Axis-line endpoints on pixel centers. Top/left use the first inside pixel; bottom/right use the last inside pixel.

axis_offset

Perpendicular screen translation for a detached axis.

axis_title_offset_to_screen

Convert an axis-title local offset to its rotated screen-space offset.

axis_title_placement

Where an axis title sits inside its side’s margin.

axis_visibility_extent

Visible reach on the inward and outward sides of an axis line.

axis_visibility_rect

Axis line/tick interaction bounds, including detached-axis translation.

chart_title_placement

colorbar_rect

The colourbar strip’s rectangle.

colorbar_title_placement

Place a colourbar title from the actual painted strip rectangle.

fit_chart_title_margin

Grow cfg.chart_title.top_margin when the measured title is taller than its band.

label_origin

Baseline origin for one measured tick label.

label_rect

Pixel rectangle occupied by a label drawn at a baseline origin.

legend_rect

point_on_rect_side

Place a fraction on one side of a rectangle. Horizontal sides run left-to-right; vertical sides run bottom-to-top, matching numeric axes. The colourbar renderer, label hit geometry, and tests all use this one mapping rather than independently deciding which screen end is low.

rect_axis_visibility_rect

Axis line/tick interaction bounds when the axis runs on one edge of an arbitrary rectangle. The colourbar uses this with its painted strip rectangle, so a shortened, aligned, or freely offset strip and its axis chrome cannot acquire different interaction geometry.

screen_offset_to_axis_title

Convert a screen-space drag delta to an axis title’s local offset frame.