6

我希望在启动应用程序时选项卡面板 tab2 = 停用，并且一旦我单击第一个选项卡面板 tab1 中的按钮就会激活，我尝试使用 shinyjs 和 CSS 属性，但我不能这样做。

谢谢你的帮助亚历克斯

library(shiny)
library(shinyjs)
runApp(list(
ui = bootstrapPage(
tabsetPanel(
  tabPanel(title = "tab1", id="tab1",
           br(),
           actionButton("click", label = "View tab2 panel")),
  tabPanel(title = "tab2", id="tab2")
)
),
server = function(input, output, session){
}
))
4

3 回答 3

17

你需要一点javascript来做到这一点。这是使用 shinyjs 的解决方案。我还包括了一些 css，以便在禁用选项卡时清楚

jscode <- "
shinyjs.disableTab = function(name) {
  var tab = $('.nav li a[data-value=' + name + ']');
  tab.bind('click.tab', function(e) {
    e.preventDefault();
    return false;
  });
  tab.addClass('disabled');
}

shinyjs.enableTab = function(name) {
  var tab = $('.nav li a[data-value=' + name + ']');
  tab.unbind('click.tab');
  tab.removeClass('disabled');
}
"

css <- "
.nav li a.disabled {
  background-color: #aaa !important;
  color: #333 !important;
  cursor: not-allowed !important;
  border-color: #aaa !important;
}"

library(shiny)
library(shinyjs)
runApp(list(
  ui = fluidPage(
    useShinyjs(),
    extendShinyjs(text = jscode),
    inlineCSS(css),
    tabsetPanel(
      id = "navbar",
      tabPanel(title = "tab1", id = "tab1",
               br(),
               actionButton("btn", label = "View tab2 panel")),
      tabPanel(title = "tab2", id = "tab2")
    )
  ),
  server = function(input, output, session) {

    # disable tab2 on page load
    js$disableTab("tab2")

    observeEvent(input$btn, {
      # enable tab2 when clicking the button
      js$enableTab("tab2")
      # switch to tab2
      updateTabsetPanel(session, "navbar", "tab2")
    })
  }
))

您也可以将 javascript 放在一个单独的文件中并使用extendShinyjs(file = ...)而不是extendShinyjs(text = ...).

于 2015-07-30T09:00:43.367 回答
5

5 年后再看这个，我不得不对 Dean 的代码进行更改以使其工作：

extendShinyjs(text = jscode)

变成

extendShinyjs(text = jscode, functions = c('disableTab','enableTab'))
于 2020-12-30T16:38:13.833 回答
2

对@DeanAttali 的reprex 中的论点、和工作value的id一些小的说明：value

library("shiny")
library("shinyjs")
library("V8") ## Required for shinyjs::extendShinyjs()

## JavaScript that dis/enables the ABILITY to click the tab (without changing aesthetics)
app_jscode <-
  "shinyjs.disableTab = function(name) {
    var tab = $('.nav li a[data-value=' + name + ']');
    tab.bind('click.tab', function(e) {
      e.preventDefault();
      return false;
    });
    tab.addClass('disabled');
  }
  shinyjs.enableTab = function(name) {
    var tab = $('.nav li a[data-value=' + name + ']');
    tab.unbind('click.tab');
    tab.removeClass('disabled');
  }"
## css snipit that makes it LOOK like we are/n't able click the tab (with outchanging functionality)
app_css <-
  ".nav li a.disabled {
    background-color: #aaa !important;
    color: #333 !important;
    cursor: not-allowed !important;
    border-color: #aaa !important;
  }"

ui = fluidPage(
  shinyjs::useShinyjs(),
  shinyjs::extendShinyjs(text = app_jscode),
  shinyjs::inlineCSS(app_css),
  navbarPage(title = "Navbar title!", id = "navbarid",
             tabPanel(title = "tab1", ## id and value args not needed
                      br(),
                      p("in tab 1."),
                      actionButton("btn", label = "toggle locked tabs")),
             tabPanel(title = "tab2", ## id and value args not needed
                      p("in tab 2."))
  )
)
server = function(input, output, session) {
  ## Disable tab2 on page load
  js$disableTab("tab2")
  
  observeEvent(input$btn, {
    ## Enable tab2 when clicking the button
    shinyjs::js$enableTab("tab2") ## On a tab's title
    ## Switch to tab2
    updateNavbarPage(session, "navbarid", "tab2") ## On navbar's id, tab's title
    #### Taking it further: 
    ## Also disable tab1 as a selection
    shinyjs::js$disableTab("tab1")
  })
}
shinyApp(ui = ui, server = server)
于 2020-06-25T01:28:42.783 回答