有人知道选中按钮时如何突出显示边框或颜色吗?
请在下面找到可复制的示例
library(shiny)
ui <- fluidPage(
actionButton(inputId = "button1", label = "Select red"),
actionButton(inputId = "button2", label = "Select blue"),
plotOutput("distPlot")
)
server <- function(input, output) {
r <- reactiveValues(my_color = "green")
output$distPlot <- renderPlot({
x <- faithful[, 2]
bins <- seq(min(x), max(x))
hist(x, breaks = bins, col = r$my_color)
})
observeEvent(input$button1, {
r$my_color <- "red"
})
observeEvent(input$button2, {
r$my_color <- "blue"
})
}
shinyApp(ui = ui, server = server)
这是上面的代码所得到的:
这就是当我选择“选择红色”按钮时我想得到的(请注意,当选择按钮时,它应该突出显示另一个):
如果不可能,是否存在一种在选择按钮时更改按钮颜色的方法?
预先感谢
答案 0 :(得分:4)
您可以使用shinyjs包在按钮上添加/删除CSS类。在这里,我使用Bootstrap中的btn-primary
类将按钮设置为蓝色,但是您也可以添加自己的样式。
library(shiny)
library(shinyjs)
ui <- fluidPage(
useShinyjs(),
actionButton(inputId = "button1", label = "Select red"),
actionButton(inputId = "button2", label = "Select blue"),
plotOutput("distPlot")
)
server <- function(input, output) {
r <- reactiveValues(my_color = "green")
output$distPlot <- renderPlot({
x <- faithful[, 2]
bins <- seq(min(x), max(x))
hist(x, breaks = bins, col = r$my_color)
})
observeEvent(input$button1, {
removeClass("button2", "btn-primary")
addClass("button1", "btn-primary")
r$my_color <- "red"
})
observeEvent(input$button2, {
removeClass("button1", "btn-primary")
addClass("button2", "btn-primary")
r$my_color <- "blue"
})
}
shinyApp(ui = ui, server = server)