waiter 0.1.2

• Much improved spinners API.
• Allow previewing the spinners with preview_spinner.
• Spinner kit no longer force prints, print method added for this.
• Added ability to automatically show and hide the loading screen when the server is busy/idle with waiter_on_busy
• Remove include_js argument to simplify API

waiter 0.1.1

New Feature

• Added theme-related functions (waiter_set_theme, waiter_get_theme, and waiter_unset_theme) to enable setting a global theme; making such that every waiter loading screen uses the same options (color, html, and logo). This can e overridden in individual waiter loading screens.
• Added a new spin_google spinner
• Added a convenience function transparent to easily create transparent waiter backgrounds.
• Added a cheat sheet, thanks to JH Kim
• Add ability to reduce load size of CSS (raised by issue #47), use_waiter takes a spinner argument to which one can specify any of 7 spinner CSS kits, by default all kits are loaded. One can know which kits should be specified by simply typing the spinner in the console, e.g.: spin_rotating_plane().
• Fix waiter example.

Bug Fixes

• Check if Rstudio 1.2 available, warn if not on attach, see #41 where waiter fails with earlier version of RStudio.
• Change internal css class to avoid clash with shinydashboard, see #43.

waiter 0.1.0

Version 0.1.0 sees great many changes. Nothing has been broken but has been deprecated. The steward and garcon family of functions have been added.

Waiter

All functions now start with waiter_.

• The new waiter_show function deprecates show_waiter
• The new waiter_hide function deprecates hide_waiter
• The new waiter_update function deprecates update_waiter
• The new waiter_show_on_load function deprecates show_waiter_on_load
• The new waiter_hide_on_load function deprecates hide_waiter_on_load

The Reference class Waiter takes a new optional id first argument which takes one or more ids of elements to overlay the waiter over, the content of the waiter (html) becomes the second argument. If passing a list of ids one can pass a list of content html.

library(shiny)
library(waiter)

ui <- fluidPage(
  use_waiter(),
  actionButton("btn", "Render"),
  fluidRow(
    column(6, plotOutput("plot1")),
    column(6, plotOutput("plot2"))
  )
)

server <- function(input, output) {

  w <- Waiter$new(
    list("plot1", "plot2"),
    html = list(spin_1(), spin_2())
  )

  dataset <- reactive({
    input$btn
    w$show()
    Sys.sleep(2)
    runif(100)
  })

  output$plot1 <- renderPlot(plot(dataset()))
  output$plot2 <- renderPlot(plot(dataset()))

}

shinyApp(ui, server)

Waitress

The waitress also sees a lot of changes, again nothing has been broken.

• call_waitress has been deprecated in favour of the Reference class, please use Waitress$new() instead.
• The Waitress can now also be used as notification
• Many methods have been renamed (deprecated) to more closely match shiny::Progress
• Addition of the min and max arguments, one is no longer limited to percentages
• Possibility to create an infinite progress bar (deprecates the butler)
• Additional html argument on start method to add content on waitress

library(shiny)
library(waiter)

ui <- fluidPage(
  use_waitress(),
  actionButton("btn", "render"),
  plotOutput("plot")
)

server <- function(input, output) {

  w <- Waitress$new("#plot", min = 0, max = 10)

  output$plot <- renderPlot({
    input$btn

    w$start("LOADING")

    for(i in 1:10){
      Sys.sleep(.3)
      w$inc(1)
    }

    w$close()

    plot(runif(100))
  })

}

shinyApp(ui, server)

Hostess

The hostess is a new addition to the staff, it works hand in hand with waiter to allow you to layer a progress bar on top of the waiter (though it can be used on its own). Moreover the latter progress bars can be greatly customised.

library(shiny)
library(waiter)

ui <- fluidPage(
  use_waiter(),
  use_hostess(),
  waiter_show_on_load(
    color = "#f7fff7",
    hostess_loader(
      "loader", 
      preset = "circle", 
      text_color = "black",
      class = "label-center",
      center_page = TRUE
    )
  )
)

server <- function(input, output){
  hostess <- Hostess$new("loader")

  for(i in 1:10){
    Sys.sleep(runif(1) / 2)
    hostess$set(i * 10)
  }

  waiter_hide()
}

shinyApp(ui, server)