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[英]Unique row DT::renderDataTable() in Shiny R trigger query
[英]Reset row selection for DT::renderDataTable() in Shiny R
我再现了由Yihui Xie编写的一个闪亮的应用程序示例( https://yihui.shinyapps.io/DT-rows/ )。 该应用程序使用DT::renderDataTable()
,允许行选择。
一切都很好。 然而,我想知道是否可以重置行选择(即撤消点击选择)? 我已经尝试了一个操作按钮来重置s = input$x3_rows_selected
(参见下面的脚本)。
使用我当前的脚本, s = input$x3_rows_selected
确实会被清空,但我可以不重新填充它。 此外,所选行仍然被点击(阴影)
有没有人有想法? DT :: renderDataTable()中是否有一个选项来重置选择? 或者有没有人有解决方法的想法?
谢谢!
我的修改(操作按钮)示例表单https://yihui.shinyapps.io/DT-rows/ ):
library(shiny)
library(DT)
shinyServer(function(input, output, session) {
# you must include row names for server-side tables
# to be able to get the row
# indices of the selected rows
mtcars2 = mtcars[, 1:8]
output$x3 = DT::renderDataTable(mtcars2, rownames = TRUE, server = TRUE)
# print the selected indices
selection <- reactive({
if (input$resetSelection)
vector() else input$x3_rows_selected
})
output$x4 = renderPrint({
if (length(selection())) {
cat("These rows were selected:\n\n")
output <- selection()
cat(output, sep = "\n")
}
})
})
library(shiny)
shinyUI(
fluidPage(
title = 'Select Table Rows',
h1('A Server-side Table'),
fluidRow(
column(9, DT::dataTableOutput('x3')),
column(3, verbatimTextOutput('x4'),
actionButton('resetSelection',
label = "Click to reset row selection"
) # end of action button
) #end of column
)))
这是一个可能的解决方案,可能不是最好的,但它的工作原理。 它基于每次单击操作按钮时重新创建数据表,因此将删除所选行。
library(shiny)
library(DT)
runApp(list(
server = function(input, output, session) {
mtcars2 = mtcars[, 1:8]
output$x3 = DT::renderDataTable({
# to create a new datatable each time the reset button is clicked
input$resetSelection
mtcars2
}, rownames = TRUE, server = TRUE
)
# print the selected indices
selection <- reactive ({
input$x3_rows_selected
})
output$x4 = renderPrint({
if (length(selection())) {
cat('These rows were selected:\n\n')
output <- selection()
cat(output, sep = '\n')
}
})
},
ui = shinyUI(fluidPage(
title = 'Select Table Rows',
h1('A Server-side Table'),
fluidRow(
column(9, DT::dataTableOutput('x3')),
column(3, verbatimTextOutput('x4'),
actionButton( 'resetSelection',label = "Click to reset row selection")
) #end of column
)
))
))
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