自定义闪亮的selectInput中的下拉宽度

Question

从this question采用的以下代码可防止下拉包装文本，并设置所有下拉列表的宽度。

有没有办法为每个selectInput自定义下拉列表的宽度？

library(shiny)

ui <- (fluidPage(
  sidebarLayout(
    sidebarPanel(
      selectInput("userInput","Select User", c(1,2,3),
                  selected=1),
      selectInput("LongInput", "Long Strings", c("This is a long long string that is long.",
                                                 "This is a long long string that is longer."))
    ),

    # allows for long texts to not be wrapped, and sets width of drop-down
    tags$head(
      tags$style(HTML('
                      .selectize-input {
                      white-space: nowrap;
                      }
                      .selectize-dropdown {
                      width: 660px !important;
                      }'
              )
            )
          )
        )
      ))

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

shinyApp(ui, server)

Answer 1

如果我理解你的权利，你需要像

这样的东西

   library(shiny)

ui <- (fluidPage(
  sidebarLayout(
    sidebarPanel(
      selectInput("userInput","Select User", c(1,2,3),
                  selected=1),
      selectInput("LongInput", "Long Strings", c("This is a long long string that is long.",
                                                 "This is a long long string that is longer."))
    ),

    # allows for long texts to not be wrapped, and sets width of drop-down
    tags$head(
      tags$style(HTML('
                      .selectize-input {
                      white-space: nowrap;
                      }
                      #LongInput + div>.selectize-dropdown{
                      width: 660px !important;
                      }
                      #userInput + div>.selectize-dropdown{
                                            width: 300px !important;
                      }
                      '
              )
      )
      )
      )
      ))

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

shinyApp(ui, server)

其LongInput设置为660px，userInput设置为300px

更新

你也可以做到dunamic 例如，你有输入名称和大小的df

df1=data.frame(name=c("LongInput","userInput"),px=c(600,300))

所以试试

library(shiny)

ui <- (fluidPage(
  sidebarLayout(
    sidebarPanel(
      selectInput("userInput","Select User", c(1,2,3),
                  selected=1),
      selectInput("LongInput", "Long Strings", c("This is a long long string that is long.",
                                                 "This is a long long string that is longer."))
    ),

    uiOutput("din_css")

      )
      ))

server <- function(input, output, session) {
  df1=data.frame(name=c("LongInput","userInput"),px=c(600,300))

output$din_css=renderUI({
    tags$head(
      tags$style(HTML(paste0('
                      .selectize-input {
                      white-space: nowrap;
                      }',
                      paste(apply(df1,1,function(i){
                           paste0("#",i[["name"]],"+ div>.selectize-dropdown{
                            width: ",i[["px"]],"px !important;
                           }")
                      })
                      ,collapse='/n')      )
      )
      )
    )
  })
}

shinyApp(ui, server)