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Contents

handle2 methods

Crosshair

Returned by area:crosshair(...). The active hover crosshair on one plot area — reconfigure it in place or remove it.

Obtained from
PlotArea:crosshair

The examples on this page start from:

lua
local color = datumhue.color
local canvas = datumhue.draw.new({ width = 400, height = 300 })
canvas:mount({ width = 400, height = 300 })
local plot = canvas:chart({ margin = { left = 40, bottom = 40 } })
local crosshair = plot:crosshair()

Methods 2

Crosshair:update

method
Crosshair:update(options: chart.CrosshairOptions)

Reconfigure the crosshair in place. Raises after remove.

Example
-- Keeps the guide lines and turns the value readout off.
crosshair:update({ readout = false, line_color = color("#e67e80") })

options chart.CrosshairOptions options 5 keys Omitted keys keep their current value.

KeyTypeDescription
linesbooleanDraw the crosshair lines.
line_colorColorCrosshair line color.
readoutbooleanShow the value readout.
readout_colorColorReadout text color.
mark_valuesbooleanHighlight nearest mark values.

Crosshair:remove

method
Crosshair:remove()

Remove the crosshair and everything it draws. The area can then construct a new one. Safe to call more than once.

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