问题
The R shiny script below displays "output$brand_selector" output in subItem1. I wish to display the same output in subItem2 and subItem3. Please help, also when I open the dashboard, the output is present by default, I wish to make it appear only when I click on a subItem, thanks and please help.
candyData <- read.table(
text = "
Brand Candy value
Nestle 100Grand Choc1
Netle Butterfinger Choc2
Nestle Crunch Choc2
Hershey's KitKat Choc4
Hershey's Reeses Choc3
Hershey's Mounds Choc2
Mars Snickers Choc5
Nestle 100Grand Choc3
Nestle Crunch Choc4
Hershey's KitKat Choc5
Hershey's Reeses Choc2
Hershey's Mounds Choc1
Mars Twix Choc3
Mars Vaid Choc2",
header = TRUE,
stringsAsFactors = FALSE)
library(shiny)
library(shinydashboard)
ui <- dashboardPage(
dashboardHeader(),
dashboardSidebar(
sidebarMenu(
id = "tabs",
menuItem("Charts", icon = icon("bar-chart-o"),
menuSubItem("Sub-item 1", tabName = "subitem1"),
menuSubItem("Sub-item 2", tabName = "subitem2"),
menuSubItem("Sub-item 3", tabName = "subitem3")
))),
dashboardBody(
tabItems(tabItem("subitem1", uiOutput("brand_selector")),
tabItem("subitem2", 4),
tabItem("subitem3", 7))
))
server <- function(input, output,session) {
observeEvent(input$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$Select2]))
})
output$brand_selector <- renderUI({
box(title = "Data", status = "primary", solidHeader = T, width = 12,
fluidPage(
fluidRow(
column(2,offset = 0, style='padding:1px;',
selectInput("Select1","select1",unique(candyData$Brand))),
column(2,offset = 0,
style='padding:1px;',selectInput("Select2","select2",choices = NULL)),
column(2, offset = 0,
style='padding:1px;',selectInput("Select3","select3",choices=NULL ))
)))
})}
shinyApp(ui = ui, server = server)
回答1:
You could create a dummy tabItem which is hidden and select that bu default. This will give the illusion that no tabItem is selected. To hide the tabItem option you could use hidden function from shinyjs package.
Following is the modified ui code:
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", uiOutput("brand_selector")),
tabItem("subitem2", 4),
tabItem("subitem3", 7))
))
EDIT1: As per the comments and reference from the answers given bu Joe here you can do that as follows:
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)
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", uiOutput("brand_selector")),
tabItem("subitem2", uiOutput("brand_selector1")),
tabItem("subitem3", uiOutput("brand_selector2")))
))
server <- 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$Select2]))
})
output$brand_selector1 <- output$brand_selector2 <- output$brand_selector <- renderUI({
box(title = "Data", status = "primary", solidHeader = T, width = 12,
fluidPage(
fluidRow(
column(2,offset = 0, style='padding:1px;',
selectInput("Select1","select1",unique(candyData$Brand))),
column(2,offset = 0,
style='padding:1px;',selectInput("Select2","select2",choices = NULL)),
column(2, offset = 0,
style='padding:1px;',selectInput("Select3","select3",choices=NULL ))
)))
})}
shinyApp(ui = ui, server = server)
EDIT2:
Here is a slightly different approach without using renderUI and using shinyModule:
candyData <- read.table(
text = "
Brand Candy value
Nestle 100Grand Choc1
Netle Butterfinger Choc2
Nestle Crunch Choc2
Hershey's KitKat Choc4
Hershey's Reeses Choc3
Hershey's Mounds Choc2
Mars Snickers Choc5
Nestle 100Grand Choc3
Nestle Crunch Choc4
Hershey's KitKat Choc5
Hershey's Reeses Choc2
Hershey's Mounds Choc1
Mars Twix Choc3
Mars Vaid Choc2",
header = TRUE,
stringsAsFactors = FALSE)
library(shiny)
library(shinydashboard)
submenuUI <- function(id) {
ns <- NS(id)
tagList(
box(title = "Data", status = "primary", solidHeader = T, width = 12,
fluidPage(
fluidRow(
column(2,offset = 0, style='padding:1px;',
selectInput(ns("Select1"),"select1",unique(candyData$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 ))
)))
)
}
# 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)
Hope it helps!
来源：https://stackoverflow.com/questions/48394545/usage-of-uioutput-in-multiple-menuitems-in-r-shiny-dashboard