70   function _removeEventListener(eventName, handler) {  argument
71     if (!this.__eventListeners[eventName]) {
76       fabric.util.removeFromArray(this.__eventListeners[eventName], handler);
79       this.__eventListeners[eventName].length = 0;
93   function observe(eventName, handler) {  argument
99       for (var prop in eventName) {
100         this.on(prop, eventName[prop]);
104       if (!this.__eventListeners[eventName]) {
105         this.__eventListeners[eventName] = [ ];
107       this.__eventListeners[eventName].push(handler);
123   function stopObserving(eventName, handler) {  argument
134       for (var prop in eventName) {
135         _removeEventListener.call(this, prop, eventName[prop]);
139       _removeEventListener.call(this, eventName, handler);
154   function fire(eventName, options) {  argument
159     var listenersForEvent = this.__eventListeners[eventName];
1685   function createDispatcher(uid, eventName) {  argument
1687       if (handlers[uid] && handlers[uid][eventName]) {
1688         var handlersForEvent = handlers[uid][eventName];
1714     addListener = function (element, eventName, handler) {  argument
1715       element.addEventListener(eventName, handler, false);
1718     removeListener = function (element, eventName, handler) {  argument
1719       element.removeEventListener(eventName, handler, false);
1725     addListener = function (element, eventName, handler) {
1731       if (!listeners[uid][eventName]) {
1732         listeners[uid][eventName] = [ ];
1736       listeners[uid][eventName].push(listener);
1737       element.attachEvent('on' + eventName, listener.wrappedHandler);
1740     removeListener = function (element, eventName, handler) {
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];
1746             element.detachEvent('on' + eventName, listener.wrappedHandler);
1747             listeners[uid][eventName][i] = null;
1755     addListener = function (element, eventName, handler) {
1760       if (!handlers[uid][eventName]) {
1761         handlers[uid][eventName] = [ ];
1762         var existingHandler = element['on' + eventName];
1764           handlers[uid][eventName].push(existingHandler);
1766         element['on' + eventName] = createDispatcher(uid, eventName);
1768       handlers[uid][eventName].push(handler);
1771     removeListener = function (element, eventName, handler) {
1773       if (handlers[uid] && handlers[uid][eventName]) {
1774         var handlersForEvent = handlers[uid][eventName];
9743     _fire: function(eventName, target, e) {  argument
9744       this.fire('object:' + eventName, { target: target, e: e });
9745       target.fire(eventName, { e: e });