我有一个闪亮的应用程序,有两个选项卡,每个选项卡都有一个具有numericInputs的DataTable,所以我必须绑定和取消绑定DataTable才能使numericInput工作。不幸的是,这产生了反应性问题,我希望有人可以提供帮助。在下面的示例中,如果更改侧栏上用于确定表中数据的输入,则只有打开选项卡中的表才会实际更新/响应。
library(shiny)
library(DT)
shinyApp(
ui = fluidPage(
sidebarPanel(
# choose dataset
selectInput("select","Choose dataset",c("mtcars","iris"))),
# display table
mainPanel(
tabsetPanel(tabPanel("one",DT::dataTableOutput('x1')),
tabPanel("two",DT::dataTableOutput('x2'))),
tags$script(HTML("Shiny.addCustomMessageHandler('unbind-DT', function(id) {
Shiny.unbindAll($('#'+id).find('table').DataTable().table().node());
})")))),
server = function(session, input, output) {
# function for dynamic inputs in DT
shinyInput <- function(FUN,id,num,...) {
inputs <- character(num)
for (i in seq_len(num)) {
inputs[i] <- as.character(FUN(paste0(id,i),label=NULL,...))
}
inputs
}
# function to read DT inputs
shinyValue <- function(id,num) {
unlist(lapply(seq_len(num),function(i) {
value <- input[[paste0(id,i)]]
if (is.null(value)) NA else value
}))
}
# reactive dataset
data <- reactive({
req(input$select)
session$sendCustomMessage('unbind-DT', 'x1')
get(input$select)[1:5,1:3]
})
data2 <- reactive({
req(input$select)
session$sendCustomMessage('unbind-DT', 'x2')
get(input$select)[5:10,1:3]
})
# render datatable with inputs
output$x1 <- DT::renderDataTable({
data.frame(data(),ENTER = shinyInput(numericInput,"numin",nrow(data()),value=NULL))
},
server=FALSE,escape=FALSE,selection='none',
options=list(language = list(search = 'Filter:'),
preDrawCallback=JS(
'function() {
Shiny.unbindAll(this.api().table().node());}'),
drawCallback= JS(
'function(settings) {
Shiny.bindAll(this.api().table().node());}')))
output$x2 <- DT::renderDataTable({
data.frame(data2(),
ENTER = shinyInput(numericInput,"numin2",nrow(data2()),value=NULL))
},
server=FALSE,escape=FALSE,selection='none',
options=list(language = list(search = 'Filter:'),
preDrawCallback=JS(
'function() {
Shiny.unbindAll(this.api().table().node());}'),
drawCallback= JS(
'function(settings) {
Shiny.bindAll(this.api().table().node());}')))
outputOptions(output, "x1", suspendWhenHidden = FALSE)
outputOptions(output, "x2", suspendWhenHidden = FALSE)
}
)
即使隐藏了关闭选项卡中的表格,也会设置选项,使其仍然可以像隐藏它一样运行。任何指导都将不胜感激。
编辑:既然我年纪大了,那就更聪明了,我绝不会以这种方式将HTML添加到DataTable中。编写一个在客户端编写HTML的JS回调函数更有意义。答案 0 :(得分:1)
下面是您更新的有效代码。
所有的功劳归功于tomasreigl,我从他在这里开设的问题https://github.com/rstudio/shiny/issues/1246
library(shiny)
library(DT)
shinyApp(
ui = fluidPage(
sidebarPanel(
# choose dataset
selectInput("select","Choose dataset",c("mtcars","iris"))),
# display table
mainPanel(
tabsetPanel(tabPanel("one",DT::dataTableOutput('x1')),
tabPanel("two",DT::dataTableOutput('x2'))),
tags$head(
tags$script('
Shiny.addCustomMessageHandler("unbinding_table_elements", function(x) {
Shiny.unbindAll($(document.getElementById(x)).find(".dataTable"));
});'
)
)
)
),
server = function(session, input, output) {
# function for dynamic inputs in DT
shinyInput <- function(FUN,id,num,...) {
inputs <- character(num)
for (i in seq_len(num)) {
inputs[i] <- as.character(FUN(paste0(id,i),label=NULL,...))
}
inputs
}
# function to read DT inputs
shinyValue <- function(id,num) {
unlist(lapply(seq_len(num),function(i) {
value <- input[[paste0(id,i)]]
if (is.null(value)) NA else value
}))
}
# reactive dataset
data <- reactive({
req(input$select)
session$sendCustomMessage('unbinding_table_elements', 'x1')
get(input$select)[1:5,1:3]
})
data2 <- reactive({
req(input$select)
session$sendCustomMessage('unbinding_table_elements', 'x2')
get(input$select)[5:10,1:3]
})
# render datatable with inputs
output$x1 <- DT::renderDataTable({
data.frame(data(),ENTER = shinyInput(numericInput,"numin",nrow(data()),value=NULL))
},
server=FALSE,escape=FALSE,selection='none',
options=list(language = list(search = 'Filter:'),
preDrawCallback=JS(
'function() {
Shiny.unbindAll(this.api().table().node());}'),
drawCallback= JS(
'function(settings) {
Shiny.bindAll(this.api().table().node());}')))
output$x2 <- DT::renderDataTable({
data.frame(data2(),
ENTER = shinyInput(numericInput,"numin2",nrow(data2()),value=NULL))
},
server=FALSE,escape=FALSE,selection='none',
options=list(language = list(search = 'Filter:'),
preDrawCallback=JS(
'function() {
Shiny.unbindAll(this.api().table().node());}'),
drawCallback= JS(
'function(settings) {
Shiny.bindAll(this.api().table().node());}')))
}
)