#' (Deprecated) Black Theme for \pkg{ggplot2} Graphics
#'
#' A black theme for ggplot graphics inspired by a blog post of Jon Lefcheck
#' (\url{https://jonlefcheck.net/2013/03/11/black-theme-for-ggplot2-2/}).
#'
#' @param base_size base font size
#' @param base_family base font family
#'
#' @return A \code{theme} object used in \pkg{ggplot2} graphics.
#'
#' @details When using \code{theme_black} in plots powered by the
#' \pkg{bayesplot} package such as \code{pp_check} or \code{stanplot},
#' I recommend using the \code{"viridisC"} color scheme (see examples).
#'
#' @examples
#' \dontrun{
#' # change default ggplot theme
#' ggplot2::theme_set(theme_black())
#'
#' # change default bayesplot color scheme
#' bayesplot::color_scheme_set("viridisC")
#'
#' # fit a simple model
#' fit <- brm(count ~ zAge + zBase * Trt + (1|patient),
#' data = epilepsy, family = poisson(), chains = 2)
#' summary(fit)
#'
#' # create various plots
#' plot(marginal_effects(fit), ask = FALSE)
#' pp_check(fit)
#' mcmc_plot(fit, type = "hex", variable = c("b_Intercept", "b_Trt1"))
#' }
#'
#' @export
theme_black = function(base_size = 12, base_family = "") {
warning2("'theme_black' is deprecated. Please use the 'ggdark' package ",
"for dark ggplot themes.")
theme_grey(base_size = base_size, base_family = base_family) %+replace%
theme(
# axis options
axis.line = element_blank(),
axis.text.x = element_text(
size = base_size * 0.8, color = "white", lineheight = 0.9
),
axis.text.y = element_text(
size = base_size * 0.8, color = "white", lineheight = 0.9
),
axis.ticks = element_line(color = "white", size = 0.2),
axis.title.x = element_text(
size = base_size, color = "white", margin = margin(10, 0, 0, 0)
),
axis.title.y = element_text(
size = base_size, color = "white", angle = 90,
margin = margin(0, 10, 0, 0)
),
axis.ticks.length = unit(0.3, "lines"),
# legend options
legend.background = element_rect(color = NA, fill = "black"),
legend.key = element_rect(color = "white", fill = "black"),
legend.key.size = unit(1.2, "lines"),
legend.key.height = NULL,
legend.key.width = NULL,
legend.text = element_text(size = base_size * 0.8, color = "white"),
legend.title = element_text(
size = base_size * 0.8, face = "bold", hjust = 0, color = "white"
),
legend.position = "right",
legend.text.align = NULL,
legend.title.align = NULL,
legend.direction = "vertical",
legend.box = NULL,
# panel options
panel.background = element_rect(fill = "black", color = NA),
panel.border = element_rect(fill = NA, color = "white"),
panel.grid.major = element_line(color = "grey35"),
panel.grid.minor = element_line(color = "grey20"),
panel.spacing = unit(0.5, "lines"),
# facetting options
strip.background = element_rect(fill = "grey30", color = "grey10"),
strip.text.x = element_text(
size = base_size * 0.8, color = "white", margin = margin(3, 0, 4, 0)
),
strip.text.y = element_text(
size = base_size * 0.8, color = "white", angle = -90
),
# plot options
plot.background = element_rect(color = "black", fill = "black"),
plot.title = element_text(size = base_size * 1.2, color = "white"),
plot.margin = unit(rep(1, 4), "lines")
)
}
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