自动完成并在文本框中选择多个值

Question

是否可以使用类似于谷歌搜索的自动完成字符串和闪亮文本框中的堆栈溢出标签选择来选择多个值。

dataset<-cbind("John Doe","Ash","Ajay sharma","Ken Chong","Will Smith","Neo"....etc)

我想从上述数据集中选择多个变量作为自动填充我的文本框并将其传递给我的服务器。R

ui.R

shinyUI(fluidPage(
  titlePanel("test"),

  sidebarLayout(
    sidebarPanel(
      helpText("text"),

      textInput("txt","Enter the text",""),
      #Pass the dataset here for auto complete

     ),

    mainPanel(
      tabsetPanel(type="tab",tabPanel("Summary"),textOutput("text2"))

    )
  )
))

服务器.R

# server.R

shinyServer(function(input, output) {

output$text2<- renderText({
paste("hello",input$txt)

 })


}
)

已编辑

我使用了来自 shinysky 的 select2input 来选择多个变量，但现在我添加了提交按钮来将选定的值放在一起。

#ui.R
select2Input("txt","This is a multiple select2Input",choices=c("a","b","c"),selected=c("")),

actionButton("go","submit") 

我想绑定选定的选项让我们说用户选择了 a 和 c 然后新变量是

#server.R
input$go #if pressed submit button
var<-cbind("a","c")
output$text<-renderText({ print ("var")})

但这不起作用

Answer 1

查看shinysky 包和textInput.typeahead。您可以自己进一步自定义textinput 的样式。 编辑：我添加了来自shinysky 包的select2Input 示例，也供参考

rm(list = ls())

library(shinysky)
library(shiny)

my_autocomplete_list <- c("John Doe","Ash","Ajay sharma","Ken Chong","Will Smith","Neo")

ui <- shinyUI(
  fluidPage(tags$style(type="text/css",".shiny-output-error { visibility: hidden; }",".shiny-output-error:before { visibility: hidden; }"),
            tags$style(type="text/css","#search { top: 50% !important;left: 50% !important;margin-top: -100px !important;margin-left: -250px 
                       !important; color: blue;font-size: 20px;font-style: italic;}"),         

            mainPanel(  
              # one way of doing it
              textInput.typeahead(id="search",
                                  placeholder="Type your name please",
                                  local=data.frame(name=c(my_autocomplete_list)),
                                  valueKey = "name",
                                  tokens=c(1:length(my_autocomplete_list)),
                                  template = HTML("<p class='repo-language'>{{info}}</p> <p class='repo-name'>{{name}}</p>")
              ),
              br(),br(),
              # using select2Input
              select2Input("select2Input1","",choices=c(my_autocomplete_list),type = c("input", "select"))
              )
  )
)

server <- function(input, output, session) {}
shinyApp(ui = ui, server = server)

根据要求编辑 2。请像我一样将您的对象包装在 reactive 表达式中，例如var <- reactive({...}) 这样你以后就可以重复使用了

rm(list = ls())

library(shinysky)
library(shiny)

my_autocomplete_list <- c("John Doe","Ash","Ajay sharma","Ken Chong","Will Smith","Neo")

ui <- shinyUI(
  fluidPage(sidebarPanel(select2Input("txt","",choices=c("a","b","c"),selected=c("")), br(),actionButton("go","submit"), width =2),
            mainPanel(textOutput('text'))
  )
)

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

  var <- reactive({
    if(input$go==0){return()}
    isolate({
      input$go
      cbind("a","c")
    })
  })  
  output$text <- renderText({var()})
}
shinyApp(ui = ui, server = server)

Answer 2

恕我直言，一个更简单的方法是使用shiny::selectizeInput()。它允许您通过 choices 参数自动完成输入。

rm(list = ls())

library(shiny)

my_autocomplete_list <- c("John Doe","Ash","Ajay sharma",
                          "Ken Chong","Will Smith","Neo")

ui <- shinyUI(
  selectizeInput(
    inputId = 'search',
    label = 'Search',
    choices = my_autocomplete_list,
    selected = NULL,
    multiple = TRUE, # allow for multiple inputs
    options = list(create = FALSE) # if TRUE, allows newly created inputs
  )
)

server <- function(input, output, session) {}
shinyApp(ui = ui, server = server)