DT Shiny中单列的渲染下拉列表 [英] render dropdown for single column in DT shiny
本文介绍了DT Shiny中单列的渲染下拉列表的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我不精通Javascript,并且想要复制
I'm not proficient in Javascript and would like to replicate a dropdown function as is available in the rhandsontable package but for the DT package.
How could this be achieved in the most efficient way?
Example
library(DT)
i <- 1:5
datatable(iris[1:20, ],
editable = T,
options = list(
columnDefs = list(
list(
targets = 5,
render = JS(
# can't get my head around what should be in the renderer...
)
))
))
The goal is to have the i
variable act as validator for the allowed input in the DT
object.
Any help is much appreciated!
解决方案
I blatantly stole the idea from Yihui's app for including radioButtons
in DT
.
Code:
library(shiny)
library(DT)
ui <- fluidPage(
title = 'Selectinput column in a table',
h3("Source:", tags$a("Yihui Xie", href = "https://yihui.shinyapps.io/DT-radio/")),
DT::dataTableOutput('foo'),
verbatimTextOutput('sel')
)
server <- function(input, output, session) {
data <- head(iris, 5)
for (i in 1:nrow(data)) {
data$species_selector[i] <- as.character(selectInput(paste0("sel", i), "", choices = unique(iris$Species), width = "100px"))
}
output$foo = DT::renderDataTable(
data, escape = FALSE, selection = 'none', server = FALSE,
options = list(dom = 't', paging = FALSE, ordering = FALSE),
callback = JS("table.rows().every(function(i, tab, row) {
var $this = $(this.node());
$this.attr('id', this.data()[0]);
$this.addClass('shiny-input-container');
});
Shiny.unbindAll(table.table().node());
Shiny.bindAll(table.table().node());")
)
output$sel = renderPrint({
str(sapply(1:nrow(data), function(i) input[[paste0("sel", i)]]))
})
}
shinyApp(ui, server)
Output:
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