34 lines
1.3 KiB
R
34 lines
1.3 KiB
R
#' @title Return function to interpolate an IMPACT color palette
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#'
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#' @param palette Character name of a palette in IMPACT palettes
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#' @param reverse Boolean indicating whether the palette should be reversed
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#' @param color_ramp_palette Should the output be a `grDevices::colorRampPalette` function or a vector of hex codes? Default to the former with `TRUE`
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#' @param show_palettes Should the ouput be the set of palettes names to pick from? Default to `FALSE`
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#' @param ... Additional arguments to pass to colorRampPalette()
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#'
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#' @return A color palette
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#'
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#' @export
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pal_impact <- function(palette = "main", reverse = FALSE, color_ramp_palette = FALSE, show_palettes = FALSE, ...) {
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palettes_impact <- list(
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`main` = cols_impact("black", "white", "main_blue", "main_grey"),
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`primary` = cols_impact("black", "white"),
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`secondary` = cols_impact("main_blue", "main_grey")
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)
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if (show_palettes) return(names(palettes_impact))
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pal <- palettes_impact[[palette]]
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if (reverse) pal <- rev(pal)
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if (color_ramp_palette) {
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rlang::check_installed("grDevices", reason = "Package \"grDevices\" needed for `pal_impact()` woth 'color_ramp_palette' set to `TRUE` to work. Please install it.")
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pal <- grDevices::colorRampPalette(pal, ...)
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}
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return(pal)
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}
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