You need to check if the button has been clicked. Try this
ui <- fluidPage(
useShinyjs(),
navbarPage(title = "Stackoverflow help", id = "tabs",
tabPanel("Home",
sidebarPanel(
fileInput("file", "Upload data",
accept = c(
"text/csv",
"text/comma-separated-values,text/plain",
".csv")
),
#checkboxInput("header", "Header", TRUE),
actionButton("append", "Add new tab"),
uiOutput('tabnamesui')
),
mainPanel(
)
)
)
)
server <- function(input, output, session) {
userfile <- reactive({
input$file
})
filereact <- reactive({
read.table(
file = userfile()$datapath,
sep = ',',
header = T,
stringsAsFactors = T
)
})
tabsnames <- reactive({
names(filereact())
})
output$tabnamesui <- renderUI({
req(userfile())
selectInput(
'tabnamesui',
h5('Tab names'),
choices = as.list(tabsnames()),
selected="",multiple = FALSE
)
})
tabnamesinput <- reactive({
input$tabnamesui})
#Append selected tab logic
observeEvent(input$append,{
appendTab(inputId = "tabs",
tabPanel(input$tabnamesui,
sidebarPanel(
actionButton(paste0("remove_", input$tabnamesui), "Delete")),
mainPanel(
#uiOutput("tabsets") #This is where I think something is broken
DTOutput(paste0("table",input$tabnamesui)),
plotOutput(paste0("plot",input$tabnamesui))
)
)
)
})
# Delete selected tab logic
observeEvent(lapply(grep(pattern = "^remove_", x = names(input), value = TRUE), function(x){input[[x]]}),{
if(input$tabs != "Home"){
if (input[[paste0("remove_",input$tabs)]]) { ## remove tab only if delete button has been clicked
removeTab(inputId = "tabs", target = input$tabs)
updateSelectInput(session, "tabnamesui", selected = input$tabnamesui) # keep the selection when re-rendering sidebarPanel
}
}
})
#New tab logic to prevent inserting same tab twice with enable/disable action button
forcecombine = function(idtab,checker) {
colnames(idtab) = colnames(checker)
rbind(idtab,checker)
}
checker<-as.data.frame("checker")
idtab<-as.data.frame("checkers")
#only allow tab entry once
observeEvent(input$append, {
idtab <- paste0(tabnamesinput())
idtab<-as.data.frame(idtab)
checkerx<-forcecombine(idtab,checker)
repeated<-length(grep(idtab,checkerx))
if(repeated==1)
{
shinyjs::disable("append")
}
else {shinyjs::enable("append")
}
})
observeEvent(input$tabnamesui, {
shinyjs::enable("append")
output[[paste0("plot",input$tabnamesui)]] <- renderPlot(plot(cars))
lapply(tabnamesinput(), function(x) {
df <- as.data.table(filereact()[[as.name(tabnamesinput())]])
output[[paste0('table',x)]] <- renderDT({
df
#subsetdata()[[x]]
})})
})
shinyjs::disable("append")
observeEvent(input$file, {
shinyjs::enable("append")
})
}
shinyApp(ui, server)
You cannot output same `ID` in multiple tabs. Once you fix that, it works. You still need to define what you wish to display in each tab. I am just displaying a filtered table and a sample plot. Also, tab removal required minor tweak. Working code is shown below.
ui <- fluidPage(
useShinyjs(),
navbarPage(title = "Stackoverflow help", id = "tabs",
tabPanel("Home",
sidebarPanel(
fileInput("file", "Upload data",
accept = c(
"text/csv",
"text/comma-separated-values,text/plain",
".csv")
),
#checkboxInput("header", "Header", TRUE),
actionButton("append", "Add new tab"),
uiOutput('tabnamesui')
),
mainPanel(
)
)
)
)
server <- function(input, output, session) {
userfile <- reactive({
input$file
})
filereact <- reactive({
read.table(
file = userfile()$datapath,
sep = ',',
header = T,
stringsAsFactors = T
)
})
tabsnames <- reactive({
names(filereact())
})
output$tabnamesui <- renderUI({
req(userfile())
selectInput(
'tabnamesui',
h5('Tab names'),
choices = as.list(tabsnames()),
selected="",multiple = FALSE
)
})
tabnamesinput <- reactive({
input$tabnamesui})
#Append selected tab logic
observeEvent(input$append,{
appendTab(inputId = "tabs",
tabPanel(input$tabnamesui,
sidebarPanel(
actionButton(paste0("remove_", input$tabnamesui), "Delete")),
mainPanel(
#uiOutput("tabsets") #This is where I think something is broken
DTOutput(paste0("table",input$tabnamesui)),
plotOutput(paste0("plot",input$tabnamesui))
)
)
)
})
# Delete selected tab logic
observeEvent(lapply(grep(pattern = "^remove_", x = names(input), value = TRUE), function(x){input[[x]]}),{
if(input$tabs != "Home"){
if (input[[paste0("remove_",input$tabs)]]) { ## remove tab only if delete button has been clicked
removeTab(inputId = "tabs", target = input$tabs)
updateSelectInput(session, "tabnamesui", selected = input$tabnamesui) # keep the selection when re-rendering sidebarPanel
}
}
})
#New tab logic to prevent inserting same tab twice with enable/disable action button
forcecombine = function(idtab,checker) {
colnames(idtab) = colnames(checker)
rbind(idtab,checker)
}
checker<-as.data.frame("checker")
idtab<-as.data.frame("checkers")
#only allow tab entry once
observeEvent(input$append, {
idtab <- paste0(tabnamesinput())
idtab<-as.data.frame(idtab)
checkerx<-forcecombine(idtab,checker)
repeated<-length(grep(idtab,checkerx))
if(repeated==1)
{
shinyjs::disable("append")
}
else {shinyjs::enable("append")
}
})
observeEvent(input$tabnamesui, {
shinyjs::enable("append")
output[[paste0("plot",input$tabnamesui)]] <- renderPlot(plot(cars))
lapply(tabnamesinput(), function(x) {
df <- as.data.table(filereact()[[as.name(tabnamesinput())]])
output[[paste0('table',x)]] <- renderDT({
df
#subsetdata()[[x]]
})})
})
shinyjs::disable("append")
observeEvent(input$file, {
shinyjs::enable("append")
})
}
shinyApp(ui, server)
[![output][1]][1]
[1]: https://i.stack.imgur.com/V2wMj.png
