draw-key-rect

Draw-key returning a small filled rectangle.

Used by bar, col, rect, tile, polygon, area, ribbon, and histogram geoms.

Usage

draw-key-rect()

Returns

Draw-key dictionary consumed by the legend renderer.

Examples

Filled rectangle glyph (the default for column layers).

#let d = (
  (g: "a", n: 3),
  (g: "b", n: 5),
)
#plot(
  data: d,
  mapping: aes(x: "g", y: "n", fill: "g"),
  layers: (geom-col(key: draw-key-rect()),),
  width: 8cm,
  height: 5cm,
)

Use the rectangle glyph on a point layer when the legend reads more naturally as colour swatches.

#let d = (
  (x: 1, y: 1, g: "a"),
  (x: 2, y: 2, g: "b"),
  (x: 3, y: 3, g: "c"),
)
#plot(
  data: d,
  mapping: aes(x: "x", y: "y", fill: "g"),
  layers: (geom-point(size: 3pt, key: draw-key-rect()),),
  width: 8cm,
  height: 5cm,
)

See also

draw-key-point, draw-key-line, draw-key-path, draw-key-blank.