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我希望在 Shiny 中为每个新创建的选项卡提供唯一的用户输入，但是一旦用户选择了它存储的输入并且不会为创建的其他选项卡更改。
场景：
数据：任何包含两列 A 和 B 的简单 csv 表都会复制下面的结果
预期结果：每个标签都有唯一的用户输入并动态更改活动标签图
我认为问题所在的代码部分：在第 68 和 120 行。有没有办法为每个修改后的选项卡设置唯一的输入？
感谢您调查我的问题。
library(shiny)
library(plyr)
library(dplyr)
library(DT)
library(shinyJs)
library(data.tablE)
library(ggplot2)
ui <- fluIDPage(
useShinyJs(),navbarPage(title = "Test",ID = "tabs",tabPanel("Home",sIDebarPanel(
fileinput("file","Upload data",accept = c(
"text/csv","text/comma-separated-values,text/plain",".csv")
),checkBoxinput("header","header",TRUE),actionbutton("append","Add new tab"),uioutput('tabnamesui')
),mainPanel(
)
)
)
)
server <- function(input,output,session) {
userfile <- reactive({
input$file
})
filereact <- reactive({
read.table(
file = userfile()$datapath,sep = ',',header = T,StringsAsFactors = T
)
})
tabsnames <- reactive({
names(filereact())
})
output$tabnamesui <- renderUI({
req(userfile())
SELEcTinput(
'tabnamesui',h5('Tab names'),choices = as.List(tabsnames()),SELEcted="",multiple = falSE
)
})
tabnamesinput <- reactive({
input$tabnamesui})
#Append SELEcted tab logic
observeEvent(input$append,{
appendTab(inputID = "tabs",tabPanel(input$tabnamesui,sIDebarPanel(
actionbutton(paste0("remove_",input$tabnamesui),"delete"),texTinput("x","X-axis label"),texTinput("titlename","title"),slIDerinput("bins","number of bins",value = 50,min = 1,max = 100)
),mainPanel(
plotOutput(paste0("dp2",input$tabnamesui))
)
)
)
})
# delete SELEcted tab logic
observeEvent(lapply(grep(pattern = "^remove_",x = names(input),value = TRUE),function(X){input[[x]]}),{
if(input$tabs != "Home"){
if (input[[paste0("remove_",input$tabs)]]) { ## remove tab only if delete button has been clicked
removeTab(inputID = "tabs",target = input$tabs)
updateSELEcTinput(session,"tabnamesui",SELEcted = input$tabnamesui) # keep the SELEction when re-rendering sIDebarPanel
}
}
})
#New tab logic to prevent inserTing same tab twice with enable/disable action button
forcecombine = function(IDtab,checker) {
colnames(IDtab) = colnames(checker)
rbind(IDtab,checker)
}
checker<-as.data.frame("checker")
IDtab<-as.data.frame("checkers")
#only allow tab entry once
observeEvent(input$append,{
IDtab <- paste0(tabnamesinput())
IDtab<-as.data.frame(IDtab)
checkerx<-forcecombine(IDtab,checker)
repeated<-length(grep(IDtab,checkerX))
if(repeated==1)
{
shinyJs::disable("append")
}
else {shinyJs::enable("append")
}
})
observeEvent(input$tabnamesui,{
shinyJs::enable("append")
lapply(tabnamesinput(),function(X) {
df <- as.data.table(filereact()[[as.name(tabnamesinput())]])
output[[paste0("dp2",input$tabnamesui)]] <- renderPlot({
bins <- seq(min(as.numeric(unList(df))),max(as.numeric(unList(df))),length.out = input$bins + 1)
hist(as.numeric(unList(df)),# histogram
col="gray",xlim=c(min(as.numeric(unList(df))),max(as.numeric(unList(df)))),border="black",breaks = seq(min(as.numeric(unList(df))),length.out = input$bins+1),prob = TRUE,# show densitIEs instead of frequencIEs
xlab = input$x,main = input$titleName)
})
})
})
shinyJs::disable("append")
observeEvent(input$file,{
shinyJs::enable("append")
})
}
shinyApp(ui,server)
试试这个
ui <- fluidPage(
useShinyjs(),navbarPage(title = "Test",id = "tabs",tabPanel("Home",sidebarPanel(
fileInput("file","Upload data",accept = c(
"text/csv","text/comma-separated-values,text/plain",".csv")
),checkboxInput("header","Header",TRUE),actionButton("append","Add new tab"),uiOutput('tabnamesui')
),mainPanel(
)
)
)
)
server <- function(input,output,session) {
userfile <- reactive({
input$file
})
filereact <- reactive({
read.table(
file = userfile()$datapath,sep = ',',header = T,StringsAsFactors = T
)
})
tabsnames <- reactive({
names(filereact())
})
output$tabnamesui <- renderUI({
req(userfile())
SELEcTinput(
'tabnamesui',h5('Tab names'),choices = as.list(tabsnames()),SELEcted="",multiple = falSE
)
})
tabnamesinput <- reactive({
input$tabnamesui})
#Append SELEcted tab logic
observeEvent(input$append,{
appendTab(inputId = "tabs",tabPanel(input$tabnamesui,sidebarPanel(
actionButton(paste0("remove_",input$tabnamesui),"delete"),texTinput(paste0("x.","X-axis label"),texTinput(paste0("titlename","title"),sliderInput("bins","number of bins",value = 50,min = 1,max = 100)
),mainPanel(
plotOutput(paste0("dp2",input$tabnamesui))
)
)
)
})
# delete SELEcted tab logic
observeEvent(lapply(grep(pattern = "^remove_",x = names(input),value = TRUE),function(X){input[[x]]}),{
if(input$tabs != "Home"){
if (input[[paste0("remove_",input$tabs)]]) { ## remove tab only if delete button has been clicked
removeTab(inputId = "tabs",target = input$tabs)
updateSELEcTinput(session,"tabnamesui",SELEcted = input$tabnamesui) # keep the SELEction when re-rendering sidebarPanel
}
}
})
#New tab logic to prevent inserTing same tab twice with enable/disable action button
forcecombine = function(idtab,checker) {
colnames(idtab) = colnames(checker)
rbind(idtab,checker)
}
checker<-as.data.frame("checker")
idtab<-as.data.frame("checkers")
#only allow tab entry once
observeEvent(input$append,{
idtab <- paste0(tabnamesinput())
idtab<-as.data.frame(idtab)
checkerx<-forcecombine(idtab,checker)
repeated<-length(grep(idtab,checkerX))
if(repeated==1)
{
shinyjs::disable("append")
}
else {shinyjs::enable("append")
}
})
observeEvent(input$tabnamesui,{
shinyjs::enable("append")
lapply(tabnamesinput(),function(X) {
df <- as.data.table(filereact()[[as.name(tabnamesinput())]])
tab_name <- input$tabnamesui
output[[paste0("dp2",input$tabnamesui)]] <- renderPlot({
bins <- seq(min(as.numeric(unlist(df))),max(as.numeric(unlist(df))),length.out = input$bins + 1)
hist(as.numeric(unlist(df)),# histogram
col="gray",xlim=c(min(as.numeric(unlist(df))),max(as.numeric(unlist(df)))),border="black",breaks = seq(min(as.numeric(unlist(df))),length.out = input$bins+1),prob = TRUE,# show densities instead of frequencies
xlab = input[[paste0("x.",tab_Name)]],main = input[[paste0("titlename",tab_Name)]] )
})
})
})
shinyjs::disable("append")
observeEvent(input$file,{
shinyjs::enable("append")
})
}
shinyApp(ui,server)
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