Create a popup dialog box interactive

Question

I was wondering if it is possible to create a popup dialog box interactive by using shiny (and shinyBS).

For example, I have a string and I want to change it and before doing a dialog box shows up asking if I really want to change it. In case I say "yes", it does it otherwise it discards the change. Here's my try but I found two issues: 1. if you click "yes" or "no", nothing changes 2. you always need to close the box by the bottom "close".

rm(list = ls())
library(shiny)
library(shinyBS)

name <- "myname"

ui =fluidPage(
  textOutput("curName"),
  br(),
  textInput("newName", "Name of variable:", name),
  br(),
  actionButton("BUTnew", "Change"),
  bsModal("modalnew", "Change name", "BUTnew", size = "small",
          textOutput("textnew"),
          actionButton("BUTyes", "Yes"),
          actionButton("BUTno", "No")
  )
)
server = function(input, output, session) {
  output$curName <- renderText({paste0("Current name: ", name)})

  observeEvent(input$BUTnew, {
    output$textnew <- renderText({paste0("Do you want to change the name?")})
  })

  observeEvent(input$BUTyes, {
    name <- input$newName
  })
}
runApp(list(ui = ui, server = server))

Other proposals are more than welcome!!

Answer 1

Here's a proposition, I mainly changed the server.R:

library(shiny)
library(shinyBS)
ui =fluidPage(
        textOutput("curName"),
        br(),
        textInput("newName", "Name of variable:", "myname"),
        br(),
        actionButton("BUTnew", "Change"),
        bsModal("modalnew", "Change name", "BUTnew", size = "small",
                HTML("Do you want to change the name?"),
                actionButton("BUTyes", "Yes"),
                actionButton("BUTno", "No")
        )
)
server = function(input, output, session) {
        values <- reactiveValues()
        values$name <- "myname";

        output$curName <- renderText({
                paste0("Current name: ", values$name)
                })

        observeEvent(input$BUTyes, {
                toggleModal(session, "modalnew", toggle = "close")
                values$name <- input$newName
        })

        observeEvent(input$BUTno, {
                toggleModal(session, "modalnew", toggle = "close")
                updateTextInput(session, "newName", value=values$name)
        })
}
runApp(list(ui = ui, server = server))

A couple of points:

I created a reactiveValues to hold the name that the person currently has. This is useful because you can then update or not update this value when the person clicks on the modal button. You can access the name using values$name.

You can use toggleModal to close the modal once the user has clicked on yes or no