Change the value of a checkbox group input on the client

Change the value of a checkbox group input on the client

Usage

update_checkbox_group_input_386(
  session,
  inputId,
  label = NULL,
  choices = NULL,
  selected = NULL,
  choiceNames = NULL,
  choiceValues = NULL
)

Arguments

session

The session object passed to function given to shinyServer.

inputId

The input slot that will be used to access the value.

label

Display label for the control, or NULL for no label.

choices

List of values to show checkboxes for. 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 values that should be initially selected, if any.

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.

See also

checkbox_group_input_386()

Examples

if (interactive()) {

 ui <- page_386(
   p("The first radio button group controls the second"),
   checkbox_group_input_386("inCheckboxGroup", "Input radio buttons",
     c("Item A", "Item B", "Item C")),
   checkbox_group_input_386("inCheckboxGroup2", "Input radio buttons 2",
     c("Item A", "Item B", "Item C"))
 )

 server <- function(input, output, session) {
   observe({
    x <- input$inCheckboxGroup

    # Can use character(0) to remove all choices
    if (is.null(x))
      x <- character(0)

    # Can also set the label and select items
    update_checkbox_group_input_386(session, "inCheckboxGroup2",
                             label = paste("Checkboxgroup label", length(x)),
                             choices = x,
                             selected = x
    )
   })
 }

 shinyApp(ui, server)
}