bigomics/bigloaders

bigLoaders

The bigLoaders package, property of BigOmics Analytics SA, provides a simple way to add custom loading spinners to Shiny apps. It has been designed to work in synchrony with the omicsplayground PlotModule structure.

Installation

You can install the bigLoaders package from GitHub using the devtools package:

# install.packages("devtools")
devtools::install_github("bigomics/bigLoaders")

Usage

To use the bigLoaders package, simply add the useSpinner() function to your Shiny app's ui function to add a spinner to any Shiny output object:

library(shiny)
library(bigLoaders)

ui <- fluidPage(
  addBigLoaderDeps(),
  titlePanel("Custom Loading Spinner with bigLoaders Package"),
  sidebarLayout(
    sidebarPanel(
      actionButton("run", "Run computation")
    ),
    mainPanel(
      div(
        style = "height: 400px",
        useSpinner(plotOutput("myplot", width = "100%", height = "400px"))
      )
    )
  )
)

server <- function(input, output, session) {
  output$myplot <- renderPlot({
    req(input$run)
    Sys.sleep(2) # Simulate a long computation
    hist(rnorm(1000))
  })
}

shinyApp(ui, server)

Customization

You can customize the appearance of the loading spinner by editing the CSS styles in the spinner.css file in the inst/www directory of the bigLoaders package.

Acknowledgements

This package was inspired by the shinycssloaders package by Dean Attali.