/* Undo button will undo the canvas using the history */ define([], function() { function undo() { var data = PaintApp.undoCanvas(); } function initGui() { var undoButton = document.getElementById('undo-button'); PaintApp.elements.undoButton = undoButton; undoButton.addEventListener('click', undo); } function hideGui() { var undoButton = document.getElementById('undo-button'); PaintApp.elements.undoButton = undoButton; PaintApp.elements.undoButton.disabled = true; } var undoButton = { initGui: initGui, hideGui: hideGui }; return undoButton; });