键盘快捷键可触发R Shiny中的反应流? [英] Keyboard shortcuts to trigger reactive flows in R Shiny?

问题描述

是否有可能在Windows的Shiny应用程序中触发 F7 或 Q ?此问题提供了用于使用键盘输入交替切换选项卡的代码，但我对启动反应式感兴趣流.例如，每次用户在键盘上按 Q 时，都会触发"按钮.

Is it possible to have, say, F7 or Q trigger a reactive flow in a Shiny app (in Windows)? This question provides code for alternating tabs with keyboard input, but I am interested in starting reactive flows. For example, a button is 'triggered' every time the user presses Q in the keyboard.

推荐答案

以下是基于的示例这个答案:

library(shiny)

runApp(shinyApp(
  ui = fluidPage(
    tags$script(HTML("$(function(){ 
      $(document).keyup(function(e) {
      if (e.which == 81) {
        $('#button').click()
      }
      });
      })")),
    actionButton("button", "An action button"),
    textOutput("text")),
  server=function(input, output, session) {
    output$text <- renderText({input$button})
  }
))

您可以使用此页面来查找要在javascript代码中使用的密钥代码.在此示例中，如果按q，则单击ID为 button 的元素.

You can use this page to find the keycode you want to use in the javascript code. In this example, if q is pressed, the element with the id button is clicked.

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