Display the selectInput value in a R shiny widget box

Question

Please run the R shiny script below, I wish to display the selectInput value in the third selectInput option in the infoBox widget and replicate the same functionality for a

Answer 1

You could do this using infoBoxOutput and renderInfoBox as shown below:

candyData <- read.table(
  text = "
  Brand       Candy           value
  Nestle      100Grand        Choc1
  Netle       Butterfinger    Choc2
  Nestle      Crunch          Choc2
  Hershey's   KitKat          Choc4
  Hershey's   Reeses          Choc3
  Hershey's   Mounds          Choc2
  Mars        Snickers        Choc5
  Nestle      100Grand        Choc3
  Nestle      Crunch          Choc4
  Hershey's   KitKat          Choc5
  Hershey's   Reeses          Choc2
  Hershey's   Mounds          Choc1
  Mars        Twix            Choc3
  Mars        Vaid            Choc2",
  header = TRUE,
  stringsAsFactors = FALSE)
library(shiny)
library(shinydashboard)
submenuUI <- function(id) {
  ns <- NS(id)
  tagList(
    box(title = "Data", status = "primary", solidHeader = T, width = 12,
        fluidPage(
          fluidRow(

            column(2,offset = 0, style='padding:1px;',

                   selectInput(ns("Select1"),"select1",unique(candyData$Brand))),
            column(2,offset = 0,

                   style='padding:1px;',selectInput(ns("Select2"),"select2",choices = NULL)),
            column(2, offset = 0,

                   style='padding:1px;',selectInput(ns("Select3"),"select3",choices=NULL ))
          ))
    ),
    infoBoxOutput(ns("ibox"))
  )}
# submenu <- function(input,output,session){}
submenuServ <- function(input, output, session){
  observeEvent(input$Select1,{
    updateSelectInput(session,'Select2',


                      choices=unique(candyData$Candy[candyData$Brand==input$Select1]))
  })
  observeEvent(input$Select2,{
    updateSelectInput(session,'Select3',


                      choices=unique(candyData$value[candyData$Brand==input$Select1 &

                                                       candyData$Candy==input$Select2]))


    output$ibox <- renderInfoBox({
      infoBox(
        "value1",
        input$Select3
      )
    })


  })}
ui <- dashboardPage(
  dashboardHeader(),
  dashboardSidebar(
    sidebarMenu(
      shinyjs::useShinyjs(),
      id = "tabs",
      menuItem("Charts", icon = icon("bar-chart-o"),
               shinyjs::hidden(menuSubItem("dummy", tabName = "dummy")),
               menuSubItem("Sub-item 1", tabName = "subitem1"),
               menuSubItem("Sub-item 2", tabName = "subitem2"),
               menuSubItem("Sub-item 3", tabName = "subitem3")
      ))),
  dashboardBody(
    tabItems(tabItem("dummy"),
             tabItem("subitem1", submenuUI('submenu1')),
             tabItem("subitem2", submenuUI('submenu2')),
             tabItem("subitem3", submenuUI('submenu3')))))
server <- function(input, output,session) {

  callModule(submenuServ,"submenu1")
  callModule(submenuServ,"submenu2")
  callModule(submenuServ,"submenu3")
}
shinyApp(ui = ui, server = server)

Hope it helps!