添加弹出窗口到闪亮的应用程序？

我想在小部件的标题旁边添加一个（？），以便用户可以将鼠标悬停或单击它并获取额外的信息和他们可以单击的链接。

这就是我现在所拥有的：

## app.R ##
library(shiny)
library(shinydashboard)
library(shinyBS)
# Header
header <- dashboardHeader()
# Sidebar
sidebar <- dashboardSidebar(fileInput("chosenfile", label = h4("File input"), 
                                      accept = ".csv"),
                            bsButton("q1", label = "", icon = icon("question"),
                                     style = "info", size = "extra-small"),
                            bsPopover(id = "q1", title = "Tidy data",
                                      content = paste0("You should read the ", 
                                                       a("tidy data paper", 
                                                         href = "http://vita.had.co.nz/papers/tidy-data.pdf",
                                                         target="_blank")),
                                      placement = "right", 
                                      trigger = "click", 
                                      options = list(container = "body")
                                      )
                            )
# Body
body <- dashboardBody()
# ui
ui <- dashboardPage(header, sidebar, body)
# server
server <- function(input, output) {

}
# run
shinyApp(ui, server)

但它远非完美。例如，(?) 的位置不在“文件输入”旁边，要关闭弹出窗口，您必须再次单击问号，而不是在弹出窗口中显示 (x)。

这个答案可能不是您最初想要的，但它仍然可能对您有用。

您说您想要标签旁边的工具提示问号，所以我将其放入标签中。正确对齐。 其次，您希望工具提示在再次单击按钮之前不会打开，因为这很烦人。弹出窗口选项“焦点”可能适合您。

## app.R ##
library(shiny)
library(shinydashboard)
library(shinyBS)
# Header
header <- dashboardHeader()
# Sidebar
sidebar <- dashboardSidebar(
  fileInput("chosenfile", 
    label = h4("File input ",
              tags$style(type = "text/css", "#q1 {vertical-align: top;}"),
              bsButton("q1", label = "", icon = icon("question"), style = "info", size = "extra-small")
            ),
    accept = ".csv"),
  bsPopover(id = "q1", title = "Tidy data",
    content = paste0("You should read the ", 
                a("tidy data paper", 
                  href = "http://vita.had.co.nz/papers/tidy-data.pdf",
                  target="_blank")
                ),
    placement = "right", 
    trigger = "focus", 
    options = list(container = "body")
  )
)
# Body
body <- dashboardBody()
# ui
ui <- dashboardPage(header, sidebar, body)
# server
server <- function(input, output) {}
# run
shinyApp(ui, server)