Module chart 

Chart Rendering

Engine-native chart generation. Each chart type produces a flat list of ChartPrimitive drawing commands. The PDF renderer iterates the list to emit vector graphics directly — no SVG intermediary.

Modules

area

Area chart builder — like line chart but with filled regions under each series.

bar

Bar chart builder.

dot

Dot plot (scatter plot) builder.

line

Line chart builder.

pie

Pie/donut chart builder.

Enums

ChartPrimitive

A drawing primitive emitted by chart builders.

TextAnchor

Text horizontal alignment for labels.

Constants

AXIS_COLOR

AXIS_LABEL_FONT

DEFAULT_COLORS

Default color palette for chart series/slices.

GRID_COLOR

LABEL_COLOR

LABEL_MARGIN

TITLE_FONT

TITLE_HEIGHT

X_AXIS_HEIGHT

Y_AXIS_WIDTH

Functions

format_number

Format a number compactly (1000 → “1K”, 1000000 → “1M”).

lighten_color

Lighten a hex color toward white by the given factor (0.0=unchanged, 1.0=white).

measure_label

Measure the width of a label string in Helvetica at the given font size.

nice_number

Round a range maximum to a “nice” number for axis ticks.

parse_hex_color

Parse a hex color string (#RGB or #RRGGBB) to a Color.

resolve_color

Get a color from the default palette by index, or parse a custom color string.