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Events in the Soundslice JavaScript API

The Soundslice player dispatches several events, which you can listen for in the parent page using addEventListener(). In each case, the message contents are serialized JSON, with a method key. The methods are:

  • ssPlayerReady — triggered when the player and API are ready. This is useful if you want to take some action at time of page load.
  • ssNotationLoaded — triggered when the notation is loaded. This will be some time after ssPlayerReady, because notation data is loaded asynchronously.
  • ssPlay — triggered when play starts.
  • ssPause — triggered when play pauses.
  • ssAudioEnd — triggered when play stops due to reaching the end of the audio/video.
  • ssSeek — triggered when the user seeks to a given time. Gets an arg key with the time, in seconds as a float.
  • ssLoopChange — triggered when the loop changes. Gets an arg key, an array with two values (start time code and end time code, both in seconds). If the loop has become empty, these values are null.
  • ssCurrentTime — triggered as a response to the getCurrentTime message. Gets an arg key with the time, in seconds as a float.
  • ssDuration — triggered as a response to the getDuration message. Gets an arg key with the time, in seconds as a float.
  • ssCurrentBar — triggered as a response to the getCurrentBar message. Gets an arg key with the zero-based bar number, as an integer.
  • ssBarCount — triggered as a response to the getBarCount message. Gets an arg key with the bar count, as an integer.
  • ssSpeed — triggered as a response to the getSpeed message. Gets an arg key with the speed, as a float.
  • ssVolume — triggered as a response to the getVolume message. Gets an arg key with the volume, as a float between 0 and 1.
  • ssVolumeChange — triggered whenever the player’s volume changes. Gets an arg key with the volume, as a float between 0 and 1.
  • ssAudioLoaded — triggered when a recording loads. Gets an arg key with the zero-based index of the recording that has loaded, as an integer.
  • ssAudioSourceChanged — triggered when the recording changes. Gets an arg key with the zero-based index of the new recording, as an integer.
  • ssToggleSettings — triggered when the user toggles the Settings menu. Gets an arg key that specifies whether the settings menu was turned on or off; 1 means on and 0 means off.
  • ssPrint — triggered when the user clicks the “Print” button in settings, to print the slice.
  • ssZoom — triggered when the notation is zoomed in or out. Gets an arg key with the new zoom level, an integer between -25 and 25 inclusive.
  • ssNotationVisibility — triggered whenever the notation visibility changes. Also gets triggered if you explicitly call getNotationVisibility. Gets an arg key with the new visiblity, as a boolean.
  • ssFullscreenSupport — triggered as a response to the getFullscreenSupport message. Gets an arg key, a boolean, which tells you whether the current browser/device supports web pages going fullscreen.

Example usage:

window.addEventListener('message', function(event) {
var cmd = JSON.parse(event.data);
switch (cmd.method) {
    case 'ssPlayerReady':
        console.log('Player is ready.');
        break;
    case 'ssPlay':
        console.log('Play has started.');
        break;
    case 'ssPause':
        console.log('Play has stopped.');
        break;
    case 'ssAudioEnd':
        console.log('Play has stopped due to reaching the end.');
        break;
    case 'ssSeek':
        console.log('Play has seeked to ' + cmd.arg + ' seconds.');
        break;
    case 'ssLoopChange':
        console.log('Loop has changed to ' + cmd.arg);
        break;
    case 'ssCurrentTime':
        console.log('Current time is ' + cmd.arg + ' seconds.');
        break;
    case 'ssDuration':
        console.log('Duration is ' + cmd.arg + ' seconds.');
        break;
    case 'ssCurrentBar':
        console.log('Current bar is ' + cmd.arg);
        break;
    case 'ssBarCount':
        console.log('Bar count is ' + cmd.arg);
        break;
    case 'ssAudioLoaded':
        console.log('Recording ' + cmd.arg + ' has loaded.');
        break;
    case 'ssAudioSourceChanged':
        console.log('Recording changed to ' + cmd.arg);
        break;
    case 'ssSpeed':
        console.log('Speed is ' + (cmd.arg * 100) + ' percent.');
        break;
    case 'ssVolume':
        console.log('Volume is ' + (cmd.arg * 100) + ' percent.');
        break;
    case 'ssToggleSettings':
        if (cmd.arg === 1) {
            console.log('Settings were toggled on.');
        }
        else if (cmd.arg === 0) {
            console.log('Settings were toggled off.');
        }
        break;
    case 'ssPrint':
        console.log('User clicked Print');
        break;
    case 'ssZoom':
        console.log('Zoom is now ' + cmd.arg);
        break;
    case 'ssNotationVisibility':
        console.log('Notation visibility is now ' + cmd.arg);
        break;
    case 'ssFullscreenSupport':
        console.log('Does this browser support full screen? ' + cmd.arg);
        break;
}
});