[英]R Shiny: slickR select event
slickR 包有一個focusOnSelect
選項 - 當單擊輪播中的圖像時,它會突出顯示。 如何訪問選擇事件以在 R Shiny 中使用以觸發其他操作? 具體來說,我想點擊一個圖像並讓它更新一個帶有圖像名稱的文本框。
要使用下面的示例,請將 3 張圖像(image1.jpg、image2.jpg、image3.jpg)放在與應用程序相同的目錄中。
library(shiny)
ui <- shiny::basicPage(
slickROutput("my_slick",width='100%',height='200px')
)
server <- function(input, output) {
output$my_slick <- renderSlickR({
my_images <- c("image1.jpg", "image2.jpg", "image3.jpg")
slickR(
my_images,
slideId = 'slick_images',
width='90%'
)
})
}
shinyApp(ui, server)
這是你想要的嗎?
library(shiny)
library(slickR)
my_images <- c("image1.png", "image2.png", "image3.png")
ui <- shiny::basicPage(
slickROutput("my_slick",width='100%',height='200px'),
tags$p(id="textbox"),
tags$script('var my_images = ["image1.png","image2.png","image3.png"];
$("#my_slick").on("click", function(e){
var slideClicked = $(this).find(".slick-active").attr("data-slick-index");
document.getElementById("textbox").innerHTML = "Selected image: " + my_images[slideClicked];
});')
)
server <- function(input, output) {
output$my_slick <- renderSlickR({
slickR(
my_images,
slideId = 'slick_images',
width='90%'
)
})
}
shinyApp(ui, server)
如果要在 Shiny 中獲取所選圖像的名稱,請在腳本中添加一行:
tags$script('var my_images = ["image1.png","image2.png","image3.png"];
$("#my_slick").on("click", function(e){
var slideClicked = $(this).find(".slick-active").attr("data-slick-index");
Shiny.setInputValue("selectedImage", my_images[slideClicked]);
document.getElementById("textbox").innerHTML = "Selected image: " + my_images[slideClicked];
});')
然后所選圖像的名稱在input$selectedImage
。
這是 OP 在評論中要求的改進腳本:
tags$script('var my_images = ["image1.png","image2.png","image3.png"];
var binary = true;
$("#my_slick").on("click", function(e){
if(e.target.localName == "img"){
if(binary){
var slideClicked = $(this).find(".slick-active").attr("data-slick-index");
Shiny.setInputValue("selectedImage", my_images[slideClicked]);
document.getElementById("textbox").innerHTML = "Selected image: " + my_images[slideClicked];
}else{
document.getElementById("textbox").innerHTML = "";
}
binary = false;
}else{
document.getElementById("textbox").innerHTML = "";
binary = true;
}
});')
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