R shiny input widget

Question

What kind of Shiny input widget can I use to implement a selector as in the picture? Is it an action button used?

Answer 1

This is most probably a radioButtons element styled with CSS. Here is an example how to apply this kind of formatting to radio buttons: https://stackoverflow.com/a/4642152/14327549

Answer 2

With package shinyWidgets and a bit of CSS you can achieve the same result:

library(shiny)
library(shinyWidgets)

ui <- fluidPage(
  tags$h1("Active background color for radioGroupButtons"),
  
  tags$style(
    ".btn-custom.active, .btn-custom:active, .btn-custom:focus, .btn-custom:hover {
      background: #4B088A !important;
      color: #FFF !important;
    }",
    ".btn-custom {border-color: #4B088A; color: #4B088A; background: #FFF;}"
  ),
  
  radioGroupButtons(
    inputId = "somevalue",
    label = NULL,
    choices = c("All cases", "Active cases"),
    status = "custom"
  ),
  verbatimTextOutput("value")
)
server <- function(input, output) {
  
  output$value <- renderPrint({ input$somevalue })
  
}
shinyApp(ui, server)