207 lines
5.9 KiB
R
207 lines
5.9 KiB
R
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add_annotation <- function(ax, type_annotation = c("xaxis", "yaxis", "points"),
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as_date = FALSE, ...) {
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type_annotation <- match.arg(type_annotation)
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config <- dropNullsOrEmpty(list(...))
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if (identical(type_annotation, "yaxis")) {
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len <- length(config$y)
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} else {
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len <- length(config$x)
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}
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config <- rapply(
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object = config,
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f = rep_len,
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length.out = len,
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how = "replace"
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)
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extract <- function(el, position) {
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`[`(el, position)
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}
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annotations <- lapply(
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X = seq_len(len),
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FUN = function(i) {
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this <- rapply(
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object = config,
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f = extract,
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position = i,
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how = "list"
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)
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if (isTRUE(as_date)) {
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this$x <- format_date(this$x)
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this$x2 <- format_date(this$x2)
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}
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this
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}
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)
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if (identical(type_annotation, "xaxis")) {
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if (!is.null(ax$x$ax_opts$annotations$xaxis)) {
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annotations <- c(annotations, ax$x$ax_opts$annotations$xaxis)
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ax$x$ax_opts$annotations$xaxis <- NULL
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}
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ax <- ax_annotations(
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ax = ax,
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position = "back",
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xaxis = annotations
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)
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} else if (identical(type_annotation, "yaxis")) {
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if (!is.null(ax$x$ax_opts$annotations$yaxis)) {
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annotations <- c(annotations, ax$x$ax_opts$annotations$yaxis)
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ax$x$ax_opts$annotations$yaxis <- NULL
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}
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ax <- ax_annotations(
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ax = ax,
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position = "back",
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yaxis = annotations
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)
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} else if (identical(type_annotation, "points")) {
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if (!is.null(ax$x$ax_opts$annotations$points)) {
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annotations <- c(annotations, ax$x$ax_opts$annotations$points)
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ax$x$ax_opts$annotations$points <- NULL
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}
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ax <- ax_annotations(
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ax = ax,
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position = "back",
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points = annotations
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)
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}
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return(ax)
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}
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#' Label for annotations
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#'
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#' @param borderColor Border Color for the label.
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#' @param borderWidth Border width for the label.
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#' @param text Text for tha annotation label.
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#' @param textAnchor The alignment of text relative to label’s drawing position.
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#' @param position Available options: left or right.
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#' @param offsetX Sets the left offset for annotation label.
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#' @param offsetY Sets the top offset for annotation label.
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#' @param background Background Color for the annotation label.
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#' @param color ForeColor for the annotation label.
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#' @param fontSize FontSize for the annotation label.
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#' @param fontWeight Font-weight for the annotation label.
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#' @param fontFamily Font-family for the annotation label.
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#' @param cssClass A custom Css Class to give to the annotation label elements.
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#' @param padding Padding for the label: top, right, bottom, left.
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#'
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#' @return A \code{list} that can be used in \code{\link{add_shade}}.
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#' @export
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#'
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label <- function(borderColor = NULL,
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borderWidth = NULL,
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text = NULL,
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textAnchor = NULL,
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position = NULL,
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offsetX = NULL,
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offsetY = NULL,
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background = NULL,
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color = NULL,
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fontSize = NULL,
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fontWeight = NULL,
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fontFamily = NULL,
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cssClass = NULL,
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padding = NULL) {
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dropNulls(list(
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borderColor = borderColor,
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borderWidth = borderWidth,
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text = text,
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textAnchor = textAnchor,
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position = position,
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offsetX = offsetX,
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offsetY = offsetY,
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style = dropNulls(list(
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background = background,
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color = color,
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fontSize = fontSize,
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fontWeight = fontWeight,
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fontFamily = fontFamily,
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padding = list(
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top = padding[1],
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right = padding[2],
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bottom = padding[3],
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left = padding[4]
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)
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))
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))
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}
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#' @title Add a shaded area to a chart
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#'
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#' @description \code{add_shade()} allow to add a shaded area on specified range,
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#' \code{add_shade_weekend()} add a shadow on every week-end.
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#'
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#' @param ax An \code{apexcharts} \code{htmlwidget} object.
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#' @param from Vector of position to start shadow.
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#' @param to Vector of position to end shadow.
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#' @param color Color of the shadow.
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#' @param opacity Opacity of the shadow.
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#' @param label Add a label to the shade, see \code{\link{label}}.
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#' @param ... Additional arguments, see
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#' \url{https://apexcharts.com/docs/options/annotations/} for possible options.
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#'
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#' @note \code{add_shade_weekend} only works if variable
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#' used for x-axis is of class \code{Date} or \code{POSIXt}.
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#'
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#' @return An \code{apexcharts} \code{htmlwidget} object.
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#' @export
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#'
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#' @name add-shade
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#'
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#' @example examples/add_shade.R
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add_shade <- function(ax, from, to, color = "#848484", opacity = 0.2, label = NULL, ...) {
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if (length(from) != length(to)) {
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stop("In add_shade: from and to must be of same length!", call. = FALSE)
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}
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add_annotation(
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ax = ax,
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type_annotation = "xaxis",
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as_date = TRUE,
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x = from,
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x2 = to,
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fillColor = color,
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opacity = opacity,
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label = label,
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...
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)
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}
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#' @export
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#' @rdname add-shade
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add_shade_weekend <- function(ax, color = "#848484", opacity = 0.2, label = NULL, ...) {
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if (is.null(ax$x$xaxis)) {
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stop("add_shade_weekend can only be used with apex().", call. = FALSE)
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}
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if (inherits(ax$x$xaxis$min, c("Date", "POSIXt"))) {
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from <- as.Date(format(ax$x$xaxis$min, format = "%Y-%m-%d"))
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to <- as.Date(format(ax$x$xaxis$max, format = "%Y-%m-%d"))
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dates <- seq(from = from - 2, to = to + 2, by = "day")
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if (inherits(ax$x$xaxis$min, "Date")) {
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sat <- dates[format(dates, format = "%u") == 5]
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time <- "12:00:00"
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} else {
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sat <- dates[format(dates, format = "%u") == 6]
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time <- "00:00:00"
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}
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sun <- sat + 2
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ax <- add_shade(
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ax = ax,
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from = paste(format(sat, format = "%Y-%m-%d"), time),
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to = paste(format(sun, format = "%Y-%m-%d"), time),
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color = color,
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opacity = opacity,
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label = label,
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...
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)
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}
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return(ax)
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}
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