ggannotate (version 0.0.1)

safe_unit: Functions to safely work with grid::unit() and grid::arrow() in Shiny If an input is NULL, NULL is returned; otherwise return a call to unit/arrow.

Description

This is needed because `unit(NULL, "inches")` gives an error, whereas we want `NULL`.

Usage

safe_unit(x, units)
safe_arrow(angle, length, ends = "last", type = "closed")

Arguments

x

Size of `grid::unit()` object

units

Units of `grid::unit()` object

angle

Angle of arrow created by `grid::arrow()`

length

Length of arrow created by `grid::arrow()`

ends

See `?grid::arrow()`

type

See `?grid::arrow()`