R/f7Gauge.R

In shinyMobile: Mobile Ready 'shiny' Apps with Standalone Capabilities

#' Framework7 gauge
#'
#' \code{f7Gauge} creates a gauge instance.
#'
#' @rdname gauge
#'
#' @param id Gauge ID.
#' @param type Gauge type. Can be "circle" or "semicircle". Default is "circle."
#' @param value Gauge value/percentage. Must be a number between 0 and 100.
#' @param size Generated SVG image size (in px). Default is 200.
#' @param bgColor Gauge background color. Can be any valid color string,
#' e.g. #ff00ff, rgb(0,0,255), etc. Default is "transparent".
#' @param borderBgColor Main border/stroke background color.
#' @param borderColor Main border/stroke color.
#' @param borderWidth Main border/stroke width.
#' @param valueText Gauge value text (large text in the center of gauge).
#' @param valueTextColor Value text color.
#' @param valueFontSize Value text font size.
#' @param valueFontWeight Value text font weight.
#' @param labelText Gauge additional label text.
#' @param labelTextColor Label text color.
#' @param labelFontSize Label text font size.
#' @param labelFontWeight Label text font weight.
#'
#' @example inst/examples/gauge/app.R
#' @author David Granjon \email{dgranjon@@ymail.com}
#'
#' @export
f7Gauge <- function(id, type = "circle", value, size = 200,
                    bgColor = "transparent", borderBgColor = "#eeeeee", borderColor = "#000000",
                    borderWidth = "10", valueText = NULL,
                    valueTextColor = "#000000", valueFontSize = "31",
                    valueFontWeight = "500", labelText = NULL, labelTextColor = "#888888",
                    labelFontSize = "14", labelFontWeight = "400") {
  if (is.null(valueText)) valueText <- paste(value, "%")

  gaugeProps <- dropNulls(
    list(
      type = type,
      value = value / 100,
      size = size,
      bgColor = bgColor,
      borderBgColor = borderBgColor,
      borderColor = borderColor,
      borderWidth = borderWidth,
      valueText = valueText,
      valueTextColor = valueTextColor,
      valueFontSize = valueFontSize,
      valueFontWeight = valueFontWeight,
      labelText = labelText,
      labelTextColor = labelTextColor,
      labelFontSize = labelFontSize,
      labelFontWeight = labelFontWeight
    )
  )

  gaugeConfig <- shiny::tags$script(
    type = "application/json",
    `data-for` = id,
    jsonlite::toJSON(
      x = gaugeProps,
      auto_unbox = TRUE,
      json_verbatim = TRUE
    )
  )

  shiny::tags$div(
    class = "gauge",
    id = id,
    gaugeConfig
  )
}

#' Update Framework7 gauge
#'
#' \code{updateF7Gauge} updates a framework7 gauge from the server side.
#'
#' @rdname gauge
#' @param session Shiny session object.
#'
#' @export
updateF7Gauge <- function(id, value = NULL, labelText = NULL, size = NULL,
                          bgColor = NULL, borderBgColor = NULL,
                          borderColor = NULL, borderWidth = NULL,
                          valueText = NULL,
                          valueTextColor = NULL, valueFontSize = NULL,
                          valueFontWeight = NULL, labelTextColor = NULL,
                          labelFontSize = NULL, labelFontWeight = NULL,
                          session = shiny::getDefaultReactiveDomain()) {
  if (is.null(valueText)) valueText <- paste(value, "%")

  message <- dropNulls(
    list(
      id = id,
      value = value / 100,
      size = size,
      bgColor = bgColor,
      borderBgColor = borderBgColor,
      borderColor = borderColor,
      borderWidth = borderWidth,
      valueText = valueText,
      valueTextColor = valueTextColor,
      valueFontSize = valueFontSize,
      valueFontWeight = valueFontWeight,
      labelText = labelText,
      labelTextColor = labelTextColor,
      labelFontSize = labelFontSize,
      labelFontWeight = labelFontWeight
    )
  )

  sendCustomMessage("update-gauge", message, session)
}