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48 lines
1.6 KiB
R
48 lines
1.6 KiB
R
#' Create radio buttons
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#'
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#' Create a set of radio buttons used to select an item from a list.
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#'
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#' @inheritParams textInput
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#' @param choices List of values to select from (if elements of the list are
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#' named then that name rather than the value is displayed to the user)
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#' @param selected The initially selected value (if not specified then
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#' defaults to the first value)
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#' @param inline If \code{TRUE}, render the choices inline (i.e. horizontally)
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#' @return A set of radio buttons that can be added to a UI definition.
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#'
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#' @family input elements
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#' @seealso \code{\link{updateRadioButtons}}
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#'
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#' @examples
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#' radioButtons("dist", "Distribution type:",
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#' c("Normal" = "norm",
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#' "Uniform" = "unif",
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#' "Log-normal" = "lnorm",
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#' "Exponential" = "exp"))
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#' @export
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radioButtons <- function(inputId, label, choices, selected = NULL,
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inline = FALSE, width = NULL) {
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# resolve names
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choices <- choicesWithNames(choices)
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# default value if it's not specified
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selected <- if (is.null(selected)) choices[[1]] else {
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validateSelected(selected, choices, inputId)
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}
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if (length(selected) > 1) stop("The 'selected' argument must be of length 1")
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options <- generateOptions(inputId, choices, selected, inline, type = 'radio')
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divClass <- "form-group shiny-input-radiogroup shiny-input-container"
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if (inline)
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divClass <- paste(divClass, "shiny-input-container-inline")
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tags$div(id = inputId,
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style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
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class = divClass,
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controlLabel(inputId, label),
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options
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)
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}
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