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#' Modify geom/stat aesthetic defaults for future plots
#'
#' @param stat,geom Name of geom/stat to modify (like `"point"` or
#' `"bin"`), or a Geom/Stat object (like `GeomPoint` or
#' `StatBin`).
#' @param new Named list of aesthetics.
#' @keywords internal
#' @export
#' @examples
#' update_geom_defaults("point", list(colour = "darkblue"))
#' ggplot(mtcars, aes(mpg, wt)) + geom_point()
#' update_geom_defaults("point", list(colour = "black"))
#' @rdname update_defaults
update_geom_defaults <- function(geom, new) {
if (is.character(geom)) {
g <- find_subclass("Geom", geom, parent.frame())
} else if (inherits(geom, "Geom")) {
g <- geom
} else {
stop('`geom` must be a string (like "point") or a Geom object (like GeomPoint).',
call. = FALSE)
}
old <- g$default_aes
g$default_aes <- defaults(new, old)
}
#' @rdname update_defaults
#' @export
update_stat_defaults <- function(stat, new) {
if (is.character(stat)) {
g <- find_subclass("Stat", stat, parent.frame())
} else if (inherits(stat, "Stat")) {
g <- stat
} else {
stop('`stat` must be a string (like "point") or a Stat object (like StatBin).',
call. = FALSE)
}
old <- g$default_aes
g$default_aes <- defaults(new, old)
}