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98 lines
3.4 KiB
R
98 lines
3.4 KiB
R
% Generated by roxygen2: do not edit by hand
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% Please edit documentation in R/update-input.R
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\name{updateRadioButtons}
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\alias{updateRadioButtons}
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\title{Change the value of a radio input on the client}
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\usage{
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updateRadioButtons(
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session = getDefaultReactiveDomain(),
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inputId,
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label = NULL,
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choices = NULL,
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selected = NULL,
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inline = FALSE,
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choiceNames = NULL,
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choiceValues = NULL
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)
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}
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\arguments{
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\item{session}{The \code{session} object passed to function given to
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\code{shinyServer}. Default is \code{getDefaultReactiveDomain()}.}
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\item{inputId}{The id of the input object.}
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\item{label}{The label to set for the input object.}
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\item{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). If
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this argument is provided, then \code{choiceNames} and \code{choiceValues} must not
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be provided, and vice-versa. The values should be strings; other types
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(such as logicals and numbers) will be coerced to strings.}
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\item{selected}{The initially selected value. If not specified, then it
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defaults to the first item in \code{choices}. To start with no items selected,
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use \code{character(0)}.}
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\item{inline}{If \code{TRUE}, render the choices inline (i.e. horizontally)}
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\item{choiceNames, choiceValues}{List of names and values, respectively, that
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are displayed to the user in the app and correspond to the each choice (for
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this reason, \code{choiceNames} and \code{choiceValues} must have the same length).
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If either of these arguments is provided, then the other \emph{must} be provided
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and \code{choices} \emph{must not} be provided. The advantage of using both of these
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over a named list for \code{choices} is that \code{choiceNames} allows any type of UI
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object to be passed through (tag objects, icons, HTML code, ...), instead
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of just simple text. See Examples.}
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}
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\description{
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Change the value of a radio input on the client
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}
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\details{
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The input updater functions send a message to the client, telling it to
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change the settings of an input object. The messages are collected and sent
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after all the observers (including outputs) have finished running.
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The syntax of these functions is similar to the functions that created the
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inputs in the first place. For example, \code{\link{numericInput}()} and
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\code{updateNumericInput()} take a similar set of arguments.
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Any arguments with NULL values will be ignored; they will not result in any
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changes to the input object on the client.
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For \code{\link{radioButtons}()}, \code{\link{checkboxGroupInput}()} and
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\code{\link{selectInput}()}, the set of choices can be cleared by using
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\code{choices=character(0)}. Similarly, for these inputs, the selected item
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can be cleared by using \code{selected=character(0)}.
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}
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\examples{
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## Only run examples in interactive R sessions
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if (interactive()) {
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ui <- fluidPage(
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p("The first radio button group controls the second"),
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radioButtons("inRadioButtons", "Input radio buttons",
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c("Item A", "Item B", "Item C")),
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radioButtons("inRadioButtons2", "Input radio buttons 2",
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c("Item A", "Item B", "Item C"))
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)
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server <- function(input, output, session) {
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observe({
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x <- input$inRadioButtons
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# Can also set the label and select items
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updateRadioButtons(session, "inRadioButtons2",
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label = paste("radioButtons label", x),
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choices = x,
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selected = x
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)
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})
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}
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shinyApp(ui, server)
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}
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}
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\seealso{
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\code{\link[=radioButtons]{radioButtons()}}
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}
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