#' nivopie
#'
#' This is an htmlwidget that draw an interactive pie chart
#'
#' @import htmlwidgets
#'
#' @export
#' @examples
#' id=c("A", "B", "C")
#' value=c(12,13,45)
#' df2=data.frame(id,value)
#' nivopie(df2)
nivopie <- function(data=NULL,
...,
width = NULL, height = NULL, elementId = NULL) {
data<- mapply(
function(id, value){
list(id=id, value=value)
},
data$id,
data$value,
SIMPLIFY = FALSE
)
# describe a React component to send to the browser for rendering.
component <- reactR::reactMarkup(htmltools::tag(
"ResponsivePie",
list(
data=data,
...
)
)
)
# create widget
htmlwidgets::createWidget(
name = 'nivopie',
component,
width = width,
height = height,
package = 'nivopie',
elementId = elementId
)
}
#' Shiny bindings for nivopie
#'
#' Output and render functions for using nivopie 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 nivopie
#' @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 nivopie-shiny
#'
#' @export
nivopieOutput <- function(outputId, width = '100%', height = '400px'){
htmlwidgets::shinyWidgetOutput(outputId, 'nivopie', width, height, package = 'nivopie')
}
#' @rdname nivopie-shiny
#' @export
renderNivopie <- function(expr, env = parent.frame(), quoted = FALSE) {
if (!quoted) { expr <- substitute(expr) } # force quoted
htmlwidgets::shinyRenderWidget(expr, nivopieOutput, env, quoted = TRUE)
}
#' Called by HTMLWidgets to produce the widget's root element.
#' @rdname nivopie-shiny
nivopie_html <- function(id, style, class, ...) {
htmltools::tagList(
# Necessary for RStudio viewer version < 1.2
reactR::html_dependency_corejs(),
reactR::html_dependency_react(),
reactR::html_dependency_reacttools(),
htmltools::tags$div(id = id, class = class, style = style)
)
}
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