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#' Create a mapboxer widget
#'
#' @param source A \link{mapbox_source} that is added to the map with the ID \code{MAPBOXER}.
#' @param style The map's Mapbox style.
#' @param ... The properties of the map, see \url{https://docs.mapbox.com/mapbox-gl-js/api/map/}.
#' @param width The width of the widget.
#' @param height The height of the widget.
#' @param element_id The unique ID of the widget.
#' @param token A Mapbox API access token. Only needed if you want to use styles from Mapbox.
#' @example examples/api-reference/map-options.R
#' @export
mapboxer <- function(source = NULL, style = basemaps$Carto$dark_matter, ...,
width = NULL, height = NULL, element_id = NULL,
token = Sys.getenv("MAPBOX_API_TOKEN")) {
map_props <- list(
style = style,
...
)
if (inherits(map_props$bounds, "bbox")) {
map_props$bounds %<>% unname()
}
widget_data <- list(
source = source,
calls = list(),
mapProps = map_props,
accessToken = token
)
htmlwidgets::createWidget(
name = "mapboxer",
x = widget_data,
width = width,
height = height,
package = "mapboxer",
elementId = element_id,
dependencies = use_deps("mapbox-gl")
)
}
#' Shiny bindings for mapboxer
#'
#' Output and render functions for using mapboxer within Shiny
#' applications and interactive Rmd documents.
#' @param outputId output variable to read from
#' @param width,height Must be a valid CSS unit (like \code{'100\%'},
#' \code{'400px'}, \code{'auto'}) or a number, which will be coerced to a
#' string and have \code{'px'} appended.
#' @param expr An expression that generates a mapboxer
#' @param env The environment in which to evaluate \code{expr}.
#' @param quoted Is \code{expr} a quoted expression (with \code{quote()})? This
#' is useful if you want to save an expression in a variable.
#' @name mapboxer-shiny
#' @example examples/api-reference/shiny.R
#' @export
mapboxerOutput <- function(outputId, width = "100%", height = "400px") {
htmlwidgets::shinyWidgetOutput(outputId, "mapboxer", width, height, package = "mapboxer")
}
#' @rdname mapboxer-shiny
#' @export
renderMapboxer <- function(expr, env = parent.frame(), quoted = FALSE) {
if (!quoted) {
expr <- substitute(expr)
} # force quoted
htmlwidgets::shinyRenderWidget(expr, mapboxerOutput, env, quoted = TRUE)
}
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