Get the inset configuration from the params or coord — get_inset

This is a helper for implementing inset-aware ggplot layers. If the inset is missing (NA) then the default inset configuration is retrieved from the coord.

Usage

get_inset_config(inset, coord)

Arguments

inset: Inset passed in as a param to the layer
coord: Coord object for the plot

Value

Inset configuration or NULL

Examples

# defining a new geom deriving from geom_sf()
GeomCustom <- ggplot2::ggproto("GeomCustom", ggplot2::GeomSf,
  draw_panel = function(self, data, panel_params, coord, inset = NA) {
    inset <- get_inset_config(inset, coord)

    # do something with the inset ...

    # note that this example doesn't pass on the remaining geom_sf params but
    # in real usage you would probably want to do that
    ggplot2::ggproto_parent(ggplot2::GeomSf, self)$draw_panel(data, panel_params, coord)
  },
)