1654         var uid = 0;
1656           return element.__uniqueID || (element.__uniqueID = 'uniqueID__' + uid++);
1663     getElement = function (uid) {  argument
1664       return elements[uid];
1667     setElement = function (uid, element) {  argument
1668       elements[uid] = element;
1672   function createListener(uid, handler) {  argument
1675       wrappedHandler: createWrappedHandler(uid, handler)
1679   function createWrappedHandler(uid, handler) {  argument
1681       handler.call(getElement(uid), e || fabric.window.event);
1685   function createDispatcher(uid, eventName) {  argument
1687       if (handlers[uid] && handlers[uid][eventName]) {
1688         var handlersForEvent = handlers[uid][eventName];
1726       var uid = getUniqueId(element);
1727       setElement(uid, element);
1728       if (!listeners[uid]) {
1729         listeners[uid] = { };
1731       if (!listeners[uid][eventName]) {
1732         listeners[uid][eventName] = [ ];
1735       var listener = createListener(uid, handler);
1736       listeners[uid][eventName].push(listener);
1741       var uid = getUniqueId(element), listener;
1742       if (listeners[uid] && listeners[uid][eventName]) {
1743         for (var i = 0, len = listeners[uid][eventName].length; i < len; i++) {
1744           listener = listeners[uid][eventName][i];
1747             listeners[uid][eventName][i] = null;
1756       var uid = getUniqueId(element);
1757       if (!handlers[uid]) {
1758         handlers[uid] = { };
1760       if (!handlers[uid][eventName]) {
1761         handlers[uid][eventName] = [ ];
1764           handlers[uid][eventName].push(existingHandler);
1766         element['on' + eventName] = createDispatcher(uid, eventName);
1768       handlers[uid][eventName].push(handler);
1772       var uid = getUniqueId(element);
1773       if (handlers[uid] && handlers[uid][eventName]) {
1774         var handlersForEvent = handlers[uid][eventName];