R DT表格顶部的水平滚动条

Question

我的DT长而闪亮。默认情况下，我想在表格顶部显示水平滚动条。有没有办法做到这一点？我当前的DT定义如下所示：

DT::datatable(dt, rownames = FALSE,
                    filter = fbox,
                    style = "bootstrap",
                    options = list(
                      dom = dom,
                      scrollX = TRUE,
                      columnDefs = list(list(orderSequence = c('desc', 'asc'), targets = "_all")),
                      processing = FALSE,
                      pageLength = 500,
                      lengthMenu = list(c(500, 1000, 5000), c("500","1000","5000"))
                    ),
                    callback = DT::JS("$(window).unload(function() { table.state.clear(); })")
 ) %>% DT::formatStyle(., cn_cat,  color = "black", backgroundColor = "#dee6ea",fontWeight = "bold")

提前致谢。

Answer 1

应用程序中所有数据表的翻转滚动条

您可以添加一些css来翻转包含滚动条/表格的div，然后按照以下答案翻转表格内容：

.dataTables_scrollBody {
    transform:rotateX(180deg);
}
.dataTables_scrollBody table {
    transform:rotateX(180deg);
}

特定数据表的翻转滚动条

如果只想翻转一张桌子上的滚动条，则可以选择特定的桌子：

#flipped > .dataTables_wrapper.no-footer > .dataTables_scroll > .dataTables_scrollBody {
    transform:rotateX(180deg);
}
#flipped > .dataTables_wrapper.no-footer > .dataTables_scroll > .dataTables_scrollBody table{
    transform:rotateX(180deg);
}

例

library(shiny)
library(DT)

css <- HTML(
    "#flipped > .dataTables_wrapper.no-footer > .dataTables_scroll > .dataTables_scrollBody {
        transform:rotateX(180deg);
    }
    #flipped > .dataTables_wrapper.no-footer > .dataTables_scroll > .dataTables_scrollBody table{
        transform:rotateX(180deg);
    }"
)

ui <- fluidPage(
    tags$head(tags$style(css)),
    fluidRow(column(width = 6,
                    h4("Flipped Scrollbar"),
                    br(),
                    DT::dataTableOutput("flipped")
                    ),
             column(width = 6,
                    h4("Regular Scrollbar"),
                    br(),
                    DT::dataTableOutput("regular")
                    )
             )
)

server <- function(input, output, session) {
    output$flipped <- DT::renderDataTable({
        DT::datatable(mtcars, rownames = FALSE,
                      options = list(
                          scrollX = TRUE
                      )
        )
    })
    output$regular <- DT::renderDataTable({
        DT::datatable(mtcars, rownames = FALSE,
                      options = list(
                          scrollX = TRUE
                      )
        )
    })
}

shinyApp(ui, server)