Automatic busy indicator (GIF)

Make a GIF play when server is busy and stop when idle.

add_busy_gif(
  src,
  timeout = 100,
  position = c("top-right", "top-left", "bottom-right", "bottom-left", "full-page",
    "free"),
  margins = c(10, 10),
  overlay_color = "rgba(0, 0, 0, 0.5)",
  overlay_css = NULL,
  height = "50px",
  width = "50px"
)

Arguments

src

Path to the GIF, an URL or a file in www/ folder.

timeout

Number of milliseconds after the server is busy to display the GIF.

position

Where to display the GIF: 'top-right', 'top-left', 'bottom-right', 'bottom-left', 'full-page'.

margins

Distance from margins, a vector of length two, where first element is distance from top/bottom, second element distance from right/left.

overlay_color

Background color for the overlay if position = "full-page".

overlay_css

Additional CSS for the overlay, for example "z-index: 1000;" to make it appear above everything.

height, width

Height and width of the spinner, default to '50px' for both, must be specified.

Value

An HTML tag that should be used in UI.

Examples

library(shiny)
library(shinybusy)

ui <- fluidPage(

  # Use this function somewhere in UI
  # with navBarPage use the "header" argument
  add_busy_gif(
    src = "https://jeroen.github.io/images/banana.gif",
    height = 70, width = 70
  ),

  actionButton("sleep", "Long calculation")
)

server <- function(input, output, session) {

  observeEvent(input$sleep, {
    Sys.sleep(5)
  })

}

if (interactive()) {
  shinyApp(ui, server)
}