with_busy_indicator_ui: Show busy indicator
In dccvalidator: Metadata Validation for Data Coordinating Centers

Description Usage Arguments Details Value Author(s) Examples

These functions add button feedback features including: disabling the button while processing requested function, showing a spinning wheel while processing requested function, displaying a green checkmark showing success upon completion, or displaying an error message if the function requested failed. They require the development version of shinyjs (>= 1.0.1.9006). With earlier versions, the buttons will succeed but visual indicator feedback will not appear.

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with_busy_indicator_ui(button)

with_busy_indicator_server(button_id, expr)

`button`	A Shiny actionButton
`button_id`	id of shiny actionButton
`expr`	the code to run when the button is clicked

Wrap the button in this function to attach visual features.

Redistributed with minor modifications under MIT License from: https://github.com/daattali/advanced-shiny/blob/de590d593a0871848a3a31afd82584637decc972/busy-indicator/helpers.R

Hint for making this work with modules by mmoisse in PR#11: https://github.com/daattali/advanced-shiny/pull/11

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Shiny UI and server logic

Dean Attali dean@attalitech.com

library("shiny")

server <- function(input, output) {
  observeEvent(input$action, {
    with_busy_indicator_server("action", {
      Sys.sleep(1)
      output$value <- renderPrint("Success!")
    })
  })
}

ui <- fluidPage(
  includeCSS(
   system.file("app/www/custom.css", package = "dccvalidator")
  ),
  with_busy_indicator_ui(actionButton("action", label = "Action")),
  fluidRow(column(2, textOutput("value")))
)

## Not run: 
shinyApp(ui, server)

## End(Not run)