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Contents

handle2 methods

PanZoom

Returned by area:pan_zoom(...). The active pan / zoom interaction on one plot area — reconfigure it in place or remove it.

Obtained from
PlotArea:pan_zoom

The examples on this page start from:

lua
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 pan_zoom = plot:pan_zoom()

Methods 2

PanZoom:update

method
PanZoom:update(options: chart.PanZoomOptions)

Reconfigure the interaction in place; an in-flight gesture is left undisturbed. Raises after remove.

Example
-- A drag already in progress is left undisturbed.
pan_zoom:update({ zoom_step = 0.5, double_click_reset = false })

options chart.PanZoomOptions options 8 keys Omitted keys keep their current value.

KeyTypeDescription
xbooleanPan / zoom the x axis.
ybooleanPan / zoom the y axis.
pan_button"left" | "right" | "middle" | "back" | "forward" | booleanDrag button for panning, or false to disable.
zoombooleanEnable scroll-wheel zoom.
zoom_stepnumberZoom step per scroll tick.
box_zoom_button"left" | "right" | "middle" | "back" | "forward" | booleanDrag button for box-zoom, or false to disable.
double_click_resetbooleanReset view on double-click.
double_click_msnumberDouble-click window in milliseconds.

PanZoom:remove

method
PanZoom:remove()

Remove the interaction — the area stops reacting to mouse / scroll. The area can then construct a new one. Safe to call more than once.

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