howlerServer: Update howler.js Server-Side

In howler: 'Shiny' Extension of 'howler.js'

Update howler.js Server-Side

Description

Change the state of the howler player from the server.

playHowl, pauseHowl, togglePlayHowl and stopHowl will all be applied to the current track.

changeTrack will update the track to the file specified.

addTrack will add a new track to the specified player.

Usage

changeTrack(id, track, session = getDefaultReactiveDomain())

addTrack(id, track, play_track = FALSE, session = getDefaultReactiveDomain())

deleteTrack(id, track, session = getDefaultReactiveDomain())

playHowl(id, session = getDefaultReactiveDomain())

pauseHowl(id, session = getDefaultReactiveDomain())

togglePlayHowl(id, session = getDefaultReactiveDomain())

stopHowl(id, session = getDefaultReactiveDomain())

seekHowl(id, seek, session = getDefaultReactiveDomain())

changeHowlSpeed(id, rate = 1, session = getDefaultReactiveDomain())

Arguments

id	ID of the howler to update
track	Either the track name of the file to change to, or the index of the file to play. If the file is not included in the player nothing will happen.
session	Shiny session
play_track	Logical, should the new track be played on addition?
seek	Time (in seconds) to set the position of the track
rate	Rate (from 0.5 to 4.0) of the audio playback speed

Details

For 'deleteTrack', make sure that the name is used of the track rather than the file name.

Value

Updates the the state of the specified howler in the shiny application.

Examples

if (interactive()) {
  library(shiny)

  tracks <- c("audio/track1.mp3", "audio/track2.mp3")

  ui <- fluidPage(
    title = "howler.js Player",
    selectInput("track", "Select Track", basename(tracks)),
    howler(elementId = "howler", tracks),
    howlerPlayPauseButton("howler")
  )

  server <- function(input, output) {
    observeEvent(input$track, changeHowlerTrack("howler", input$track))
  }

  runShiny(ui, server)
}

howler documentation built on June 22, 2024, 9:48 a.m.