调整闪亮进度条的大小并将其居中 [英] Adjust size of Shiny progress bar and center it

问题描述

我正在使用Shiny应用程序，需要计算流程，并且在执行计算进度时，我使用progressBar来显示流程.

I'm working with a Shiny app where I need to calculate processes and while the calc progress is executing, I'm using a progressBar to show the process.

问题是进度条太小，我不喜欢显示的方式.

The problem is that the progress bar is too small, and I don't like the way is shown.

所以，我在想，也许有一种方法可以使用Shiny模式来实现进度条(有一个名为modalDialog的函数).

So, I was thinking that maybe there's a way to implement a progress bar using a Shiny modal (there's a function called modalDialog).

我的想法是，当用户运行calc时，将打开一个显示progressBar的模式.

My idea is that when the user runs the calc, a modal will be opened showing a progressBar.

这是进度代码:

withProgress(message = 'Runing GSVA', value = 0, {
    incProgress(1, detail = "This may take a while...")
    functionToGenerate()
  })

有什么主意吗?

推荐答案

您好，我在软件包 shinyWidgets ，您可以将其放在模式中，但与shiny::showModal一起使用时会比较棘手，因此您可以手动创建自己的模式，如下所示.编写的代码更多，但效果很好.

Hi i wrote a progress bar function in the package shinyWidgets, you can put it in a modal, but it's tricky to use with shiny::showModal, so you can create your own modal manually like below. It's more code to write but it works fine.

library("shiny")
library("shinyWidgets")

ui <- fluidPage(
  actionButton(inputId = "go", label = "Launch long calculation"), #, onclick = "$('#my-modal').modal().focus();"

  # You can open the modal server-side, you have to put this in the ui :
  tags$script("Shiny.addCustomMessageHandler('launch-modal', function(d) {$('#' + d).modal().focus();})"),
  tags$script("Shiny.addCustomMessageHandler('remove-modal', function(d) {$('#' + d).modal('hide');})"),

  # Code for creating a modal
  tags$div(
    id = "my-modal",
    class="modal fade", tabindex="-1", `data-backdrop`="static", `data-keyboard`="false",
    tags$div(
      class="modal-dialog",
      tags$div(
        class = "modal-content",
        tags$div(class="modal-header", tags$h4(class="modal-title", "Calculation in progress")),
        tags$div(
          class="modal-body",
          shinyWidgets::progressBar(id = "pb", value = 0, display_pct = TRUE)
        ),
        tags$div(class="modal-footer", tags$button(type="button", class="btn btn-default", `data-dismiss`="modal", "Dismiss"))
      )
    )
  )
)

server <- function(input, output, session) {

  value <- reactiveVal(0)

  observeEvent(input$go, {
    shinyWidgets::updateProgressBar(session = session, id = "pb", value = 0) # reinitialize to 0 if you run the calculation several times
    session$sendCustomMessage(type = 'launch-modal', "my-modal") # launch the modal
    # run calculation
    for (i in 1:10) {
      Sys.sleep(0.5)
      newValue <- value() + 1
      value(newValue)
      shinyWidgets::updateProgressBar(session = session, id = "pb", value = 100/10*i)
    }
    Sys.sleep(0.5)
    # session$sendCustomMessage(type = 'remove-modal', "my-modal") # hide the modal programmatically
  })

}

shinyApp(ui = ui, server = server)

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