R shinydashboard collapsible menuItem with inputs - r

Question

I am trying to implement a fileInput using library(shinydashboard) to provide the user with the option to upload files (as it was done here with a basic shiny UI - please find the example code below).
I would like to place the fileInput in the dashboardSidebar in an expandable menuItem, but don't know where it should go into the shinydashboard structure.
library(shiny)
ui <- fluidPage(
titlePanel("Uploading Files"),
sidebarLayout(
sidebarPanel(
fileInput("file1", "Choose CSV File",
multiple = TRUE,
accept = c("text/csv",
"text/comma-separated-values,text/plain",
".csv")),
tags$hr(),
checkboxInput("header", "Header", TRUE),
radioButtons("sep", "Separator",
choices = c(Comma = ",",
Semicolon = ";",
Tab = "\t"),
selected = ","),
radioButtons("quote", "Quote",
choices = c(None = "",
"Double Quote" = '"',
"Single Quote" = "'"),
selected = '"'),
tags$hr(),
radioButtons("disp", "Display",
choices = c(Head = "head",
All = "all"),
selected = "head")
),
mainPanel(
tableOutput("contents")
)
)
)
server <- function(input, output) {
output$contents <- renderTable({
req(input$file1)
df <- read.csv(input$file1$datapath,
header = input$header,
sep = input$sep,
quote = input$quote)
if(input$disp == "head") {
return(head(df))
}
else {
return(df)
}
})
}
shinyApp(ui, server)

Answer 1

Edit: I cleaned up the code a little to make the difference between childfull and childless menuItem's more clear - the parameters expandedName and startExpanded can only be used with a childfull menuItem in contrast tabName and selected is only used with childless menuItem's.
library(shiny)
library(shinydashboard)
ui <- function(req) {
dashboardPage(
dashboardHeader(title = "Simple tabs"),
dashboardSidebar(sidebarMenu(
id = "sidebarItemSelected",
menuItem(
"Childfull menuItem",
menuItem(
"Childless menuItem 1",
tabName = "childlessTab1",
icon = icon("dashboard"),
selected = TRUE
),
fileInput("upload", "Upload"),
bookmarkButton(),
expandedName = "childfullMenuItem",
startExpanded = TRUE
),
menuItem(
"Childless menuItem 2",
icon = icon("th"),
tabName = "childlessTab2",
badgeLabel = "new",
badgeColor = "green"
)
)),
dashboardBody(tabItems(
tabItem(tabName = "childlessTab1",
h2("Dashboard tab content")),
tabItem(tabName = "childlessTab2",
h2("Widgets tab content"))
))
)
}
server <- function(input, output, session) {
observe({
cat(
paste(
"\nsidebarItemSelected:",
input$sidebarItemSelected,
"\nsidebarItemExpanded:",
input$sidebarItemExpanded,
"\nsidebarCollapsed:",
input$sidebarCollapsed,
"\n"
)
)
})
}
shinyApp(ui, server, enableBookmarking = "url")
Initial answer:
Sure - this is possible (modified version of this example):
library(shiny)
library(shinydashboard)
ui <- dashboardPage(
dashboardHeader(title = "Simple tabs"),
dashboardSidebar(
sidebarMenu(
menuItem("Dashboard", fileInput("upload", "Upload"), tabName = "dashboard", icon = icon("dashboard")),
menuItem("Widgets", icon = icon("th"), tabName = "widgets",
badgeLabel = "new", badgeColor = "green")
)
),
dashboardBody(
tabItems(
tabItem(tabName = "dashboard",
h2("Dashboard tab content")
),
tabItem(tabName = "widgets",
h2("Widgets tab content")
)
)
)
)
server <- function(input, output, session) {}
shinyApp(ui, server)