r - 在 R 闪亮的小部件框中显示 selectInput 值

Question

请运行下面的 R 闪亮脚本，我希望在 infoBox 小部件的第三个 selectInput 选项中显示 selectInput 值，并为下面的所有选项卡复制相同的功能。目前它是硬编码的，脚本是使用闪亮的模块编写的，所以请检查。附上截图供参考，请帮忙。

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 ))
      ))
    ),
infoBox("value1", 5)
)}
# 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]))
})}
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)

Answer 1

您可以使用infoBoxOutput和执行此操作，renderInfoBox如下所示：

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)

希望能帮助到你！