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Change the value of a radio group buttons input on the client

Usage

updateRadioGroupButtons(
  session = getDefaultReactiveDomain(),
  inputId,
  label = NULL,
  choices = NULL,
  selected = NULL,
  status = "default",
  size = "normal",
  justified = FALSE,
  checkIcon = list(),
  choiceNames = NULL,
  choiceValues = NULL,
  disabled = FALSE,
  disabledChoices = NULL
)

Arguments

session

The session object passed to function given to shinyServer. Default is getDefaultReactiveDomain().

inputId

The id of the input object.

label

The label to set for the input object.

choices

List of values to select from (if elements of the list are named then that name rather than the value is displayed to the user). If this argument is provided, then choiceNames and choiceValues must not be provided, and vice-versa. The values should be strings; other types (such as logicals and numbers) will be coerced to strings.

selected

The initially selected value. If not specified, then it defaults to the first item in choices. To start with no items selected, use character(0).

status

Add a class to the buttons, you can use Bootstrap status like 'info', 'primary', 'danger', 'warning' or 'success'. Or use an arbitrary strings to add a custom class, e.g. : with status = "custom-class", buttons will have class btn-custom-class.

size

Size of the buttons ('xs', 'sm', 'normal', 'lg')

justified

If TRUE, fill the width of the parent div

checkIcon

A list, if no empty must contain at least one element named 'yes' corresponding to an icon to display if the button is checked.

choiceNames, choiceValues

List of names and values, respectively, that are displayed to the user in the app and correspond to the each choice (for this reason, choiceNames and choiceValues must have the same length). If either of these arguments is provided, then the other must be provided and choices must not be provided. The advantage of using both of these over a named list for choices is that choiceNames allows any type of UI object to be passed through (tag objects, icons, HTML code, ...), instead of just simple text. See Examples.

disabled

Logical, disable or enable buttons, if TRUE users won't be able to select a value.

disabledChoices

Vector of specific choices to disable.

Examples

library(shiny)
library(shinyWidgets)

ui <- fluidPage(
  radioGroupButtons(
    inputId = "somevalue",
    choices = c("A", "B", "C"),
    label = "My label"
  ),

  verbatimTextOutput(outputId = "res"),

  actionButton(inputId = "updatechoices", label = "Random choices"),
  pickerInput(
    inputId = "updateselected", label = "Update selected:",
    choices = c("A", "B", "C"), multiple = FALSE
  ),
  textInput(inputId = "updatelabel", label = "Update label")
)

server <- function(input, output, session) {

  output$res <- renderPrint({
    input$somevalue
  })

  observeEvent(input$updatechoices, {
    newchoices <- sample(letters, sample(3:7))
    updateRadioGroupButtons(
      session = session,
      inputId = "somevalue",
      choices = newchoices
    )
    updatePickerInput(
      session = session,
      inputId = "updateselected",
      choices = newchoices
    )
  })

  observeEvent(input$updateselected, {
    updateRadioGroupButtons(
      session = session, inputId = "somevalue",
      selected = input$updateselected
    )
  }, ignoreNULL = TRUE, ignoreInit = TRUE)

  observeEvent(input$updatelabel, {
    updateRadioGroupButtons(
      session = session, inputId = "somevalue",
      label = input$updatelabel
    )
  }, ignoreInit = TRUE)

}

if (interactive())
  shinyApp(ui = ui, server = server)