juke.js

//example easing functions
function linearEase(currentIteration, startValue, changeInValue, totalIterations)
{
  return changeInValue * currentIteration / totalIterations + startValue;
}

function easeOutCubic(currentIteration, startValue, changeInValue, totalIterations)
{
  return changeInValue * (Math.pow(currentIteration / totalIterations - 1, 3) + 1) + startValue;
}

function updateFileList()
{
  var fileList = document.getElementById('fileList');

  var listHtml = '';
  for (var i = 0; i < songList.length; i++)
  {
    var song = songList[i];
    listHtml = listHtml + song.title + '<BR>';
  }
  fileList.innerHTML = listHtml;
}

function addFile(file, i)
{
  if (file)
  {
    var song = new Song(i, file, updateFileList);
    songList.push(song);
  }
}

function addFiles(e)
{
  var files = e.target.files;
  songCount = files.length;
  for (var i = 0; i < songCount; i++)
  {
    addFile(files[i], i);
  }
}

function hideDiv(div)
{
  div.classList.add('hiddenDiv');
}

function unHideDiv(div)
{
  div.classList.remove('hiddenDiv');
}

function startPlayer()
{
  if (songList.length == 0)
  {
    alert('Add some song files first!');
  }
  else
  {
    maxRests = songList.length / 2;
    var buttons = document.getElementById('buttons');
    var manage = document.getElementById('manage');
    manage.classList.add('hiddenDiv');

    for (var i = 0; i < songList.length; i++)
    {
      var song = songList[i];
      song.drawButton(buttons);
      song.loadAudio();
    }
  }
}

function AddListeners()
{
  document.getElementById('addFiles').addEventListener('change', addFiles, false);
  document.getElementById('startPlayer').addEventListener('click', startPlayer, false);
}

function appStart()
{
  AddListeners();
}

(function ()
{
  window.onload = appStart;
  window.onbeforeunload = function ()
  {
    return "Are you sure?";
  };
})();