Update virtual select from server

Update a virtualSelectInput() from the server.

updateVirtualSelect(
  inputId,
  label = NULL,
  choices = NULL,
  selected = NULL,
  disable = NULL,
  disabledChoices = NULL,
  open = NULL,
  session = shiny::getDefaultReactiveDomain()
)

Arguments

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 select from. You can use:

• vector use a simple vector for better performance.

• named list / named vector in the same way as with shiny::selectInput()

• custom formatted list allowing to use more options, must correspond to virtual-select specifications

• output of prepare_choices()

selected

The initially selected value (or multiple values if multiple = TRUE). If not specified then defaults to the first value for single-select lists and no values for multiple select lists.

disable

Disable (TRUE) or enable (FALSE) the select menu.

disabledChoices

List of disabled option's values.

open

Open (TRUE) or close (FALSE) the dropdown.

session

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

Value

No value.

See also

virtualSelectInput() for creating a widget in the UI.

Examples

library(shiny)
library(shinyWidgets)

ui <- fluidPage(
  tags$h2("Virtual Select (update)"),

  virtualSelectInput(
    inputId = "sel1",
    label = "Update label:",
    choices = month.name
  ),
  verbatimTextOutput("res1"),
  textInput("label_text", label = "With text:"),
  textInput("label_html", label = "With HTML:"),

  virtualSelectInput(
    inputId = "sel2",
    label = "Update selected value:",
    choices = month.name
  ),
  verbatimTextOutput("res2"),
  radioButtons("selected", "Selected value:", month.name, inline = TRUE),

  virtualSelectInput(
    inputId = "sel3",
    label = "Update choices:",
    choices = tolower(month.name)
  ),
  verbatimTextOutput("res3"),
  radioButtons("choices", "Choices:", c("lowercase", "UPPERCASE"), inline = TRUE),

  virtualSelectInput(
    inputId = "sel4",
    label = "Update choices + selected:",
    choices = tolower(month.name)
  ),
  verbatimTextOutput("res4"),
  radioButtons("choices_select", "Choices:", c("lowercase", "UPPERCASE"), inline = TRUE),

  virtualSelectInput(
    inputId = "sel5",
    label = "Disable / enable:",
    choices = tolower(month.name)
  ),
  verbatimTextOutput("res5"),
  checkboxInput("disable", "Disable", value = FALSE),
  checkboxInput("disableChoices", "Disable march and june", value = FALSE),

  virtualSelectInput(
    inputId = "sel6",
    label = "Open / close:",
    choices = tolower(month.name)
  ),
  verbatimTextOutput("res6"),
  checkboxInput("open", "Open?", value = FALSE)

)

server <- function(input, output, session) {
  output$res1 <- renderPrint(input$sel1)
  observe({
    req(input$label_text)
    updateVirtualSelect(inputId = "sel1", label = input$label_text)
  })
  observe({
    req(input$label_html)
    updateVirtualSelect(
      inputId = "sel1",
      label = tags$span(input$label_html, style = "color: red;")
    )
  })

  output$res2 <- renderPrint(input$sel2)
  observe({
    updateVirtualSelect(inputId = "sel2", selected = input$selected)
  })

  output$res3 <- renderPrint(input$sel3)
  observe({
    if (identical(input$choices, "lowercase")) {
      updateVirtualSelect(inputId = "sel3", choices = tolower(month.name))
    } else {
      updateVirtualSelect(inputId = "sel3", choices = toupper(month.name))
    }
  })

  output$res4 <- renderPrint(input$sel4)
  observe({
    if (identical(input$choices_select, "lowercase")) {
      choices <- tolower(month.name)
    } else {
      choices <- toupper(month.name)
    }
    selected <- sample(choices, 1)
    updateVirtualSelect(inputId = "sel4", choices = choices, selected = selected)
  })

  output$res5 <- renderPrint(input$sel5)
  observe({
    if (isTRUE(input$disable)) {
      updateVirtualSelect(inputId = "sel5", disable = TRUE)
    } else {
      updateVirtualSelect(inputId = "sel5", disable = FALSE)
    }
  })
  observe({
    if (isTRUE(input$disableChoices)) {
      updateVirtualSelect(inputId = "sel5", disabledChoices = c("march", "june"))
    } else {
      updateVirtualSelect(inputId = "sel5", disabledChoices = character(0))
    }
  })

  observeEvent(input$open, {
    updateVirtualSelect(inputId = "sel6", open = input$open)
  }, ignoreInit = TRUE)

}

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