R在renderDataTable单元格内闪亮选择输入 [英] R Shiny selectedInput inside renderDataTable cells

问题描述

我搜索解决方案将selectedInputs放在renderDataTable单元格中。我找到了js解决方案： https://datatables.net/examples/api/form.html，但是我不知道如何在Shinyjs中实现这个解决方案作为renderDataTable对象。我会感谢提示/想法/解决方案如何实现可编辑的renderDataTable在闪亮。

I search for solution to put selectedInputs in renderDataTable cells. I found js solutions: https://datatables.net/examples/api/form.html , however I do not know how to implement this solution in shinyjs as renderDataTable object. I would be grateful for hints / ideas / solutions how to implement editable renderDataTable in shiny.

推荐答案

非常类似于：添加一个列为TRUE / FALSE，并显示为复选框

library(shiny)
library(DT) 
runApp(list(
  ui = basicPage(
    h2('The mtcars data'),
    DT::dataTableOutput('mytable'),
    h2("Selected"),
    tableOutput("checked")
  ),

  server = function(input, output) {
    # helper function for making checkbox
    shinyInput = function(FUN, len, id, ...) { 
      inputs = character(len) 
      for (i in seq_len(len)) { 
        inputs[i] = as.character(FUN(paste0(id, i), label = NULL, ...)) 
      } 
      inputs 
    } 
    # datatable with checkbox
    output$mytable = DT::renderDataTable({
      data.frame(mtcars,Rating=shinyInput(selectInput,nrow(mtcars),"selecter_",
                                            choices=1:5, width="60px"))
    }, selection='none',server = FALSE, escape = FALSE, options = list( 
      paging=TRUE,
      preDrawCallback = JS('function() { 
Shiny.unbindAll(this.api().table().node()); }'), 
      drawCallback = JS('function() { 
Shiny.bindAll(this.api().table().node()); } ') 
    ) )
    # helper function for reading checkbox
    shinyValue = function(id, len) { 
      unlist(lapply(seq_len(len), function(i) { 
        value = input[[paste0(id, i)]] 
        if (is.null(value)) NA else value 
      })) 
    } 
    # output read checkboxes
    output$checked <- renderTable({
      data.frame(selected=shinyValue("selecter_",nrow(mtcars)))
    })
  }
))

请注意，如果您重新投递表，输入将无法正常工作，除非您添加一些额外的代码来取消绑定。

Note that if you rerender the table, the inputs won't work unless you add some extra code to unbind.

编辑：

我们假设表中的数据是反应性的，因此它会更改，表会重新呈现。这里需要明确解除绑定： https：/ /groups.google.com/forum/#!msg/shiny-discuss/ZUMBGGl1sss/zfcG9c6MBAAJ

Let's say the data in the table is reactive so it changes, and the table rerenders. You will need to explicitely unbind as per @yihui here: https://groups.google.com/forum/#!msg/shiny-discuss/ZUMBGGl1sss/zfcG9c6MBAAJ

所以你需要添加在UI中：

So you need to add in the UI:

tags$script(HTML("Shiny.addCustomMessageHandler('unbind-DT', function(id) {
          Shiny.unbindAll($('#'+id).find('table').DataTable().table().node());
        })"))

然后在服务器中，您可以触发该功能，每当您使用以下方式退回datatable：

And then in the Server you trigger the function whenever you rerender the datatable with:

session$sendCustomMessage('unbind-DT', 'mytable')

colnames参数是列名称的向量，因此当您指定长度为一个FALSE的向量时，它将为您提供一列名为FALSE的表。我不知道从列表中删除列名的简单方法。这将是一个很好的SO问题。

The colnames parameter is a vector of column names so when you specify a length one vector of FALSE it gives you a table with one column named FALSE. I am not sure of a straightforward way of removing column names from datatables. That would be a good SO question on its own.

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