在Shiny中需要使用updateRadioGroupButtons动态更新下拉选项 [英] In Shiny need to dynamically update dropdown choices with updateRadioGroupButtons
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问题描述
跟随 R发光的个人按钮悬停下拉菜单，则需要根据某些条件动态更新单选按钮.按钮的数量可能会改变.
我至少有以下与以下代码相关的查询. 1)标签是否属于服务器? 2)如何在服务器代码中动态乘以selectInput? 3)如何动态地乘以输出?我已经更改了您的实现方式，使其更适合我的应用程序.如果要在按钮上显示一个下拉菜单，则所有下拉菜单都有相同的选择，这是在dropdownTRUE中动态计算的.如果dropdownTRUE == F，则不需要下拉菜单.
Following R Shiny group buttons with individual hover dropdown selection, need to update the radiogroupbuttons dynamically based on some condition. The number of buttons may change.
I have at least the following queries related to the code below. 1) Does the tag belong in server? 2) how to dynamically multiply selectInput in the server code? 3) How to dynamically multiply the output? I have changed your implementation to fit closer to my application. All dropdowns have the same choices if the button is to be shown a dropdown, this is computed dynamically in dropdownTRUE. If dropdownTRUE==F, I don't need a dropdown.
library(shiny)
library(shinyWidgets)
js <- "
function qTip() {
$('#THE_INPUT_ID .radiobtn').each(function(i, $el){
var value = $(this).find('input[type=radio]').val();
var selector = '#select' + value;
$(this).qtip({
overwrite: true,
content: {
text: $(selector).parent().parent()
},
position: {
my: 'top left',
at: 'bottom right'
},
show: {
ready: false
},
hide: {
event: 'unfocus'
},
style: {
classes: 'qtip-blue qtip-rounded'
},
events: {
blur: function(event, api) {
api.elements.tooltip.hide();
}
}
});
});
}
function qTip_delayed(x){
setTimeout(function(){qTip();}, 500);
}
$(document).on('shiny:connected', function(){
Shiny.addCustomMessageHandler('qTip', qTip_delayed);
});
"
ui <- fluidPage(
tags$head( # does this belong to server?
tags$link(rel = "stylesheet", href = "jquery.qtip.min.css"),
tags$script(src = "jquery.qtip.min.js"),
tags$script(HTML(js))
),
br(),
uiOutput('bttns'),
verbatimTextOutput("selection1")
)
server <- function(input, output, session) {
session$sendCustomMessage("qTip", "")
output$bttns<-renderUI({
bttnchoices=c("A", "B", "C")
lenchoice=length(bttnchoices)
dropdownTRUE=sample(c(T,F),lenchoice,T,rep(.5,2)) ##bttns for which dropdown is to be shown
dropchoices = c("Apple", "Banana")# same choices to be shown for all buttons with dropdownTRUE
radioGroupButtons(
inputId = "THE_INPUT_ID",
individual = TRUE,
label = "Make a choice: ",
choices = bttnchoices
)
div(
style = "display: none;",
shinyInput(lenchoice,selectInput, # struggling with dynamic multiplication of selectInput, lapply?
"select",
label = "Select a fruit",
choices=dropchoices,
selectize = FALSE
))
})
observeEvent(input[["select1"]], {
if(input[["select1"]] == "Banana"){
session$sendCustomMessage("qTip", "")
output$bttns<-renderUI({
bttnchoices=c("D", "A")
lenchoice=length(bttnchoices)
dropdownTRUE=sample(c(T,F),lenchoice,T,rep(.5,2))
dropchoices = c("Peach", "Pear")
radioGroupButtons(
inputId = "THE_INPUT_ID",
individual = TRUE,
label = "Make a choice: ",
choices = bttnchoices
)
div(
style = "display: none;",
shinyInput(lenchoice,selectInput,
"select",
label = "Select a fruit",
choices = dropchoices,
selectize = FALSE
))
})
}
output$selection1<-input$select1 # struggling with dynamic multiplication of outputs, lapply?
})
}
shinyApp(ui, server)
推荐答案
这就是方法.单选按钮的值必须与selectInput id的后缀相对应.在这里A，B，C，D是值，然后selectInput的id是selectA，selectB，selectC，selectD.如果要为单选按钮使用其他名称，请执行choices = list("name1" = "A", "name2" = "B", "name3" = "C", "name4" = "D").
Here is the way. The values of the radio buttons must correspond to the suffixes of the selectInput's ids. Here A, B, C, D are the values and then the ids of the selectInput are selectA, selectB, selectC, selectD. If you want to use other names for the radio buttons, do choices = list("name1" = "A", "name2" = "B", "name3" = "C", "name4" = "D").
library(shiny)
library(shinyWidgets)
js <- "
function qTip() {
$('#THE_INPUT_ID .radiobtn').each(function(i, $el){
var value = $(this).find('input[type=radio]').val();
var selector = '#select' + value;
$(this).qtip({
overwrite: true,
content: {
text: $(selector).parent().parent()
},
position: {
my: 'top left',
at: 'bottom right'
},
show: {
ready: false
},
hide: {
event: 'unfocus'
},
style: {
classes: 'qtip-blue qtip-rounded'
},
events: {
blur: function(event, api) {
api.elements.tooltip.hide();
}
}
});
});
}
function qTip_delayed(x){
setTimeout(function(){qTip();}, 500);
}
$(document).on('shiny:connected', function(){
Shiny.addCustomMessageHandler('qTip', qTip_delayed);
});
"
ui <- fluidPage(
tags$head(
tags$link(rel = "stylesheet", href = "jquery.qtip.min.css"),
tags$script(src = "jquery.qtip.min.js"),
tags$script(HTML(js))
),
br(),
radioGroupButtons(
inputId = "THE_INPUT_ID",
individual = TRUE,
label = "Make a choice: ",
choices = c("A", "B", "C")
),
br(), br(), br(),
verbatimTextOutput("selectionA"),
verbatimTextOutput("selectionB"),
verbatimTextOutput("selectionC"),
verbatimTextOutput("selectionD"),
div(
style = "display: none;",
selectInput(
"selectA",
label = "Select a fruit",
choices = c("Apple", "Banana"),
selectize = FALSE
),
selectInput(
"selectB",
label = "Select a fruit",
choices = c("Lemon", "Orange"),
selectize = FALSE
),
selectInput(
"selectC",
label = "Select a fruit",
choices = c("Strawberry", "Pineapple"),
selectize = FALSE
),
selectInput(
"selectD",
label = "Select a fruit",
choices = c("Pear", "Peach"),
selectize = FALSE
)
)
)
server <- function(input, output, session) {
session$sendCustomMessage("qTip", "")
output[["selectionA"]] <- renderPrint(input[["selectA"]])
output[["selectionB"]] <- renderPrint(input[["selectB"]])
output[["selectionC"]] <- renderPrint(input[["selectC"]])
output[["selectionD"]] <- renderPrint(input[["selectD"]])
observeEvent(input[["selectA"]], {
if(input[["selectA"]] == "Banana"){
updateRadioGroupButtons(session, inputId = "THE_INPUT_ID",
label = "Make NEW choice: ",
choices = c("D","A"))
session$sendCustomMessage("qTip", "")
}
})
}
shinyApp(ui, server)
编辑
以下方法允许为选定的单选按钮列表设置下拉列表.
EDIT
The following way allows to set dropdowns for a chosen list of radio buttons.
library(shiny)
library(shinyWidgets)
js <- "
function qTip(values, ids) {
$('#THE_INPUT_ID .radiobtn').each(function(i, $el){
var value = $(this).find('input[type=radio]').val();
if(values.indexOf(value) > -1){
var selector = '#' + ids[value];
$(this).qtip({
overwrite: true,
content: {
text: $(selector).parent().parent()
},
position: {
my: 'top left',
at: 'bottom right'
},
show: {
ready: false
},
hide: {
event: 'unfocus'
},
style: {
classes: 'qtip-blue qtip-rounded'
},
events: {
blur: function(event, api) {
api.elements.tooltip.hide();
}
}
});
}
});
}
function qTip_delayed(mssg){
$('[data-hasqtip]').qtip('destroy', true);
setTimeout(function(){qTip(mssg.values, mssg.ids);}, 500);
}
$(document).on('shiny:connected', function(){
Shiny.addCustomMessageHandler('qTip', qTip_delayed);
});
"
ui <- fluidPage(
tags$head(
tags$link(rel = "stylesheet", href = "jquery.qtip.min.css"),
tags$script(src = "jquery.qtip.min.js"),
tags$script(HTML(js))
),
br(),
radioGroupButtons(
inputId = "THE_INPUT_ID",
individual = TRUE,
label = "Make a choice: ",
choices = c("A", "B", "C")
),
br(), br(), br(),
uiOutput("selections"),
uiOutput("dropdowns")
)
server <- function(input, output, session) {
dropdowns <- reactiveVal(list( # initial dropdowns
A = c("Apple", "Banana"),
B = c("Lemon", "Orange"),
C = c("Strawberry", "Pineapple")
))
flag <- reactiveVal(FALSE)
prefix <- reactiveVal("")
observeEvent(dropdowns(), {
if(flag()) prefix(paste0("x",prefix()))
flag(TRUE)
}, priority = 2)
observeEvent(input[["selectA"]], {
if(input[["selectA"]] == "Banana"){
updateRadioGroupButtons(session, inputId = "THE_INPUT_ID",
label = "Make NEW choice: ",
choices = c("D","A","B"))
dropdowns( # new dropdowns, only for D and B
list(
D = c("Pear", "Peach"),
B = c("Watermelon", "Mango")
)
)
}
})
observeEvent(dropdowns(), {
req(dropdowns())
session$sendCustomMessage(
"qTip",
list(
values = as.list(names(dropdowns())),
ids = setNames(
as.list(paste0(prefix(), "select", names(dropdowns()))),
names(dropdowns())
)
)
)
})
observeEvent(dropdowns(), {
req(dropdowns())
lapply(names(dropdowns()), function(value){
output[[paste0("selection",value)]] <-
renderPrint(input[[paste0(prefix(), "select", value)]])
})
})
output[["dropdowns"]] <- renderUI({
req(dropdowns())
selectInputs <- lapply(names(dropdowns()), function(value){
div(style = "display: none;",
selectInput(
paste0(prefix(), "select", value),
label = "Select a fruit",
choices = dropdowns()[[value]],
selectize = FALSE
)
)
})
do.call(tagList, selectInputs)
})
output[["selections"]] <- renderUI({
req(dropdowns())
verbOutputs <- lapply(names(dropdowns()), function(value){
verbatimTextOutput(
paste0("selection", value)
)
})
do.call(tagList, verbOutputs)
})
}
shinyApp(ui, server)
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