+Employee = Ext.extend(Ext.util.Observable, {
+ constructor: function(config){
+ this.name = config.name;
+ this.addEvents({
+ "fired" : true,
+ "quit" : true
+ });
+
+ // Copy configured listeners into *this* object so that the base class's
+ // constructor will add them.
+ this.listeners = config.listeners;
+
+ // Call our superclass constructor to complete construction process.
+ Employee.superclass.constructor.call(this, config)
+ }
+});
+
+var newEmployee = new Employee({
+ name: employeeName,
+ listeners: {
+ quit: function() {
+ // By default, "this" will be the object that fired the event.
+ alert(this.name + " has quit!");
+ }
+ }
+});
+this reference) in which the function is executed. Defaults to the Observable firing the event.
+ * @static
+ */
+ capture: function(o, fn, scope) {
+ o.fireEvent = Ext.Function.createInterceptor(o.fireEvent, fn, scope);
+ },
+
+ /**
+Sets observability on the passed class constructor.
+
+This makes any event fired on any instance of the passed class also fire a single event through
+the __class__ allowing for central handling of events on many instances at once.
+
+Usage:
+
+ Ext.util.Observable.observe(Ext.data.Connection);
+ Ext.data.Connection.on('beforerequest', function(con, options) {
+ console.log('Ajax request made to ' + options.url);
+ });
+
+ * @param {Function} c The class constructor to make observable.
+ * @param {Object} listeners An object containing a series of listeners to add. See {@link #addListener}.
+ * @static
+ * @markdown
+ */
+ observe: function(cls, listeners) {
+ if (cls) {
+ if (!cls.isObservable) {
+ Ext.applyIf(cls, new this());
+ this.capture(cls.prototype, cls.fireEvent, cls);
+ }
+ if (Ext.isObject(listeners)) {
+ cls.on(listeners);
+ }
+ return cls;
+ }
+ }
+ },
+
+ /* End Definitions */
+
+ /**
+ * @cfg {Object} listeners (optional) A config object containing one or more event handlers to be added to this + * object during initialization. This should be a valid listeners config object as specified in the + * {@link #addListener} example for attaching multiple handlers at once.
+ *DOM events from ExtJs {@link Ext.Component Components}
+ *While some ExtJs Component classes export selected DOM events (e.g. "click", "mouseover" etc), this
+ * is usually only done when extra value can be added. For example the {@link Ext.view.View DataView}'s
+ * {@link Ext.view.View#click click} event passing the node clicked on. To access DOM
+ * events directly from a child element of a Component, we need to specify the element option to
+ * identify the Component property to add a DOM listener to:
+ *
+new Ext.panel.Panel({
+ width: 400,
+ height: 200,
+ dockedItems: [{
+ xtype: 'toolbar'
+ }],
+ listeners: {
+ click: {
+ element: 'el', //bind to the underlying el property on the panel
+ fn: function(){ console.log('click el'); }
+ },
+ dblclick: {
+ element: 'body', //bind to the underlying body property on the panel
+ fn: function(){ console.log('dblclick body'); }
+ }
+ }
+});
+Adds listeners to any Observable object (or Element) which are automatically removed when this Component
+ * is destroyed.
+ * @param {Observable/Element} item The item to which to add a listener/listeners.
+ * @param {Object/String} ename The event name, or an object containing event name properties.
+ * @param {Function} fn Optional. If the ename parameter was an event name, this
+ * is the handler function.
+ * @param {Object} scope Optional. If the ename parameter was an event name, this
+ * is the scope (this reference) in which the handler function is executed.
+ * @param {Object} opt Optional. If the ename parameter was an event name, this
+ * is the {@link Ext.util.Observable#addListener addListener} options.
+ */
+ addManagedListener : function(item, ename, fn, scope, options) {
+ var me = this,
+ managedListeners = me.managedListeners = me.managedListeners || [],
+ config;
+
+ if (Ext.isObject(ename)) {
+ options = ename;
+ for (ename in options) {
+ if (options.hasOwnProperty(ename)) {
+ config = options[ename];
+ if (!me.eventOptionsRe.test(ename)) {
+ me.addManagedListener(item, ename, config.fn || config, config.scope || options.scope, config.fn ? config : options);
+ }
+ }
+ }
+ }
+ else {
+ managedListeners.push({
+ item: item,
+ ename: ename,
+ fn: fn,
+ scope: scope,
+ options: options
+ });
+
+ item.on(ename, fn, scope, options);
+ }
+ },
+
+ /**
+ * Removes listeners that were added by the {@link #mon} method.
+ * @param {Observable|Element} item The item from which to remove a listener/listeners.
+ * @param {Object|String} ename The event name, or an object containing event name properties.
+ * @param {Function} fn Optional. If the ename parameter was an event name, this
+ * is the handler function.
+ * @param {Object} scope Optional. If the ename parameter was an event name, this
+ * is the scope (this reference) in which the handler function is executed.
+ */
+ removeManagedListener : function(item, ename, fn, scope) {
+ var me = this,
+ options,
+ config,
+ managedListeners,
+ managedListener,
+ length,
+ i;
+
+ if (Ext.isObject(ename)) {
+ options = ename;
+ for (ename in options) {
+ if (options.hasOwnProperty(ename)) {
+ config = options[ename];
+ if (!me.eventOptionsRe.test(ename)) {
+ me.removeManagedListener(item, ename, config.fn || config, config.scope || options.scope);
+ }
+ }
+ }
+ }
+
+ managedListeners = me.managedListeners ? me.managedListeners.slice() : [];
+ length = managedListeners.length;
+
+ for (i = 0; i < length; i++) {
+ managedListener = managedListeners[i];
+ if (managedListener.item === item && managedListener.ename === ename && (!fn || managedListener.fn === fn) && (!scope || managedListener.scope === scope)) {
+ Ext.Array.remove(me.managedListeners, managedListener);
+ item.un(managedListener.ename, managedListener.fn, managedListener.scope);
+ }
+ }
+ },
+
+ /**
+ *
Fires the specified event with the passed parameters (minus the event name).
+ *An event may be set to bubble up an Observable parent hierarchy (See {@link Ext.Component#getBubbleTarget}) + * by calling {@link #enableBubble}.
+ * @param {String} eventName The name of the event to fire. + * @param {Object...} args Variable number of parameters are passed to handlers. + * @return {Boolean} returns false if any of the handlers return false otherwise it returns true. + */ + fireEvent: function() { + var me = this, + args = Ext.Array.toArray(arguments), + ename = args[0].toLowerCase(), + ret = true, + event = me.events[ename], + queue = me.eventQueue, + parent; + + if (me.eventsSuspended === true) { + if (queue) { + queue.push(args); + } + } else if (event && Ext.isObject(event) && event.bubble) { + if (event.fire.apply(event, args.slice(1)) === false) { + return false; + } + parent = me.getBubbleTarget && me.getBubbleTarget(); + if (parent && parent.isObservable) { + if (!parent.events[ename] || !Ext.isObject(parent.events[ename]) || !parent.events[ename].bubble) { + parent.enableBubble(ename); + } + return parent.fireEvent.apply(parent, args); + } + } else if (event && Ext.isObject(event)) { + args.shift(); + ret = event.fire.apply(event, args); + } + return ret; + }, + + /** + * Appends an event handler to this object. + * @param {String} eventName The name of the event to listen for. May also be an object who's property names are event names. See + * @param {Function} handler The method the event invokes. + * @param {Object} scope (optional) The scope (this reference) in which the handler function is executed.
+ * If omitted, defaults to the object which fired the event.
+ * @param {Object} options (optional) An object containing handler configuration.
+ * properties. This may contain any of the following properties:this reference) in which the handler function is executed.
+ * If omitted, defaults to the object which fired the event.This option is useful during Component construction to add DOM event listeners to elements of {@link Ext.Component Components} which + * will exist only after the Component is rendered. For example, to add a click listener to a Panel's body:
+new Ext.panel.Panel({
+ title: 'The title',
+ listeners: {
+ click: this.handlePanelClick,
+ element: 'body'
+ }
+});
+When added in this way, the options available are the options applicable to {@link Ext.core.Element#addListener}
+ * Combining Options
+ * Using the options argument, it is possible to combine different types of listeners:
+ *
+ * A delayed, one-time listener.
+ *
+myPanel.on('hide', this.handleClick, this, {
+single: true,
+delay: 100
+});
+ * Attaching multiple handlers in 1 call
+ * The method also allows for a single argument to be passed which is a config object containing properties
+ * which specify multiple events. For example:
+myGridPanel.on({
+ cellClick: this.onCellClick,
+ mouseover: this.onMouseOver,
+ mouseout: this.onMouseOut,
+ scope: this // Important. Ensure "this" is correct during handler execution
+});
+
+ */
+ addListener: function(ename, fn, scope, options) {
+ var me = this,
+ config,
+ event;
+
+ if (Ext.isObject(ename)) {
+ options = ename;
+ for (ename in options) {
+ if (options.hasOwnProperty(ename)) {
+ config = options[ename];
+ if (!me.eventOptionsRe.test(ename)) {
+ me.addListener(ename, config.fn || config, config.scope || options.scope, config.fn ? config : options);
+ }
+ }
+ }
+ }
+ else {
+ ename = ename.toLowerCase();
+ me.events[ename] = me.events[ename] || true;
+ event = me.events[ename] || true;
+ if (Ext.isBoolean(event)) {
+ me.events[ename] = event = new Ext.util.Event(me, ename);
+ }
+ event.addListener(fn, scope, Ext.isObject(options) ? options : {});
+ }
+ },
+
+ /**
+ * Removes an event handler.
+ * @param {String} eventName The type of event the handler was associated with.
+ * @param {Function} handler The handler to remove. This must be a reference to the function passed into the {@link #addListener} call.
+ * @param {Object} scope (optional) The scope originally specified for the handler.
+ */
+ removeListener: function(ename, fn, scope) {
+ var me = this,
+ config,
+ event,
+ options;
+
+ if (Ext.isObject(ename)) {
+ options = ename;
+ for (ename in options) {
+ if (options.hasOwnProperty(ename)) {
+ config = options[ename];
+ if (!me.eventOptionsRe.test(ename)) {
+ me.removeListener(ename, config.fn || config, config.scope || options.scope);
+ }
+ }
+ }
+ } else {
+ ename = ename.toLowerCase();
+ event = me.events[ename];
+ if (event.isEvent) {
+ event.removeListener(fn, scope);
+ }
+ }
+ },
+
+ /**
+ * Removes all listeners for this object including the managed listeners
+ */
+ clearListeners: function() {
+ var events = this.events,
+ event,
+ key;
+
+ for (key in events) {
+ if (events.hasOwnProperty(key)) {
+ event = events[key];
+ if (event.isEvent) {
+ event.clearListeners();
+ }
+ }
+ }
+
+ this.clearManagedListeners();
+ },
+
+ //true
+ * or the first event name string if multiple event names are being passed as separate parameters.
+ * @param {String} [additional] Optional additional event names if multiple event names are being passed as separate parameters.
+ * Usage:
+this.addEvents('storeloaded', 'storecleared');
+queueSuspended parameter, then all
+ * events fired during event suspension will be sent to any listeners now.
+ */
+ resumeEvents: function() {
+ var me = this,
+ queued = me.eventQueue || [];
+
+ me.eventsSuspended = false;
+ delete me.eventQueue;
+
+ Ext.each(queued,
+ function(e) {
+ me.fireEvent.apply(me, e);
+ });
+ },
+
+ /**
+ * Relays selected events from the specified Observable as if the events were fired by this.
+ * @param {Object} origin The Observable whose events this object is to relay.
+ * @param {Array} events Array of event names to relay.
+ */
+ relayEvents : function(origin, events, prefix) {
+ prefix = prefix || '';
+ var me = this,
+ len = events.length,
+ i = 0,
+ oldName,
+ newName;
+
+ for (; i < len; i++) {
+ oldName = events[i].substr(prefix.length);
+ newName = prefix + oldName;
+ me.events[newName] = me.events[newName] || true;
+ origin.on(oldName, me.createRelayer(newName));
+ }
+ },
+
+ /**
+ * @private
+ * Creates an event handling function which refires the event from this object as the passed event name.
+ * @param newName
+ * @returns {Function}
+ */
+ createRelayer: function(newName){
+ var me = this;
+ return function(){
+ return me.fireEvent.apply(me, [newName].concat(Array.prototype.slice.call(arguments, 0, -1)));
+ };
+ },
+
+ /**
+ * Enables events fired by this Observable to bubble up an owner hierarchy by calling
+ * this.getBubbleTarget() if present. There is no implementation in the Observable base class.
This is commonly used by Ext.Components to bubble events to owner Containers. See {@link Ext.Component#getBubbleTarget}. The default + * implementation in Ext.Component returns the Component's immediate owner. But if a known target is required, this can be overridden to + * access the required target more quickly.
+ *Example:
+Ext.override(Ext.form.field.Base, {
+// Add functionality to Field's initComponent to enable the change event to bubble
+initComponent : Ext.Function.createSequence(Ext.form.field.Base.prototype.initComponent, function() {
+ this.enableBubble('change');
+}),
+
+// We know that we want Field's events to bubble directly to the FormPanel.
+getBubbleTarget : function() {
+ if (!this.formPanel) {
+ this.formPanel = this.findParentByType('form');
+ }
+ return this.formPanel;
+}
+});
+
+var myForm = new Ext.formPanel({
+title: 'User Details',
+items: [{
+ ...
+}],
+listeners: {
+ change: function() {
+ // Title goes red if form has been modified.
+ myForm.header.setStyle('color', 'red');
+ }
+}
+});
+this reference) in which the handler function is executed.
+ * If omitted, defaults to the object which fired the event.
+ * @param {Object} options (optional) An object containing handler configuration.
+ * @method on
+ */
+
+ this.createAlias({
+ on: 'addListener',
+ un: 'removeListener',
+ mon: 'addManagedListener',
+ mun: 'removeManagedListener'
+ });
+
+ //deprecated, will be removed in 5.0
+ this.observeClass = this.observe;
+
+ Ext.apply(Ext.util.Observable.prototype, function(){
+ // this is considered experimental (along with beforeMethod, afterMethod, removeMethodListener?)
+ // allows for easier interceptor and sequences, including cancelling and overwriting the return value of the call
+ // private
+ function getMethodEvent(method){
+ var e = (this.methodEvents = this.methodEvents || {})[method],
+ returnValue,
+ v,
+ cancel,
+ obj = this;
+
+ if (!e) {
+ this.methodEvents[method] = e = {};
+ e.originalFn = this[method];
+ e.methodName = method;
+ e.before = [];
+ e.after = [];
+
+ var makeCall = function(fn, scope, args){
+ if((v = fn.apply(scope || obj, args)) !== undefined){
+ if (typeof v == 'object') {
+ if(v.returnValue !== undefined){
+ returnValue = v.returnValue;
+ }else{
+ returnValue = v;
+ }
+ cancel = !!v.cancel;
+ }
+ else
+ if (v === false) {
+ cancel = true;
+ }
+ else {
+ returnValue = v;
+ }
+ }
+ };
+
+ this[method] = function(){
+ var args = Array.prototype.slice.call(arguments, 0),
+ b, i, len;
+ returnValue = v = undefined;
+ cancel = false;
+
+ for(i = 0, len = e.before.length; i < len; i++){
+ b = e.before[i];
+ makeCall(b.fn, b.scope, args);
+ if (cancel) {
+ return returnValue;
+ }
+ }
+
+ if((v = e.originalFn.apply(obj, args)) !== undefined){
+ returnValue = v;
+ }
+
+ for(i = 0, len = e.after.length; i < len; i++){
+ b = e.after[i];
+ makeCall(b.fn, b.scope, args);
+ if (cancel) {
+ return returnValue;
+ }
+ }
+ return returnValue;
+ };
+ }
+ return e;
+ }
+
+ return {
+ // these are considered experimental
+ // allows for easier interceptor and sequences, including cancelling and overwriting the return value of the call
+ // adds an 'interceptor' called before the original method
+ beforeMethod : function(method, fn, scope){
+ getMethodEvent.call(this, method).before.push({
+ fn: fn,
+ scope: scope
+ });
+ },
+
+ // adds a 'sequence' called after the original method
+ afterMethod : function(method, fn, scope){
+ getMethodEvent.call(this, method).after.push({
+ fn: fn,
+ scope: scope
+ });
+ },
+
+ removeMethodListener: function(method, fn, scope){
+ var e = this.getMethodEvent(method),
+ i, len;
+ for(i = 0, len = e.before.length; i < len; i++){
+ if(e.before[i].fn == fn && e.before[i].scope == scope){
+ e.before.splice(i, 1);
+ return;
+ }
+ }
+ for(i = 0, len = e.after.length; i < len; i++){
+ if(e.after[i].fn == fn && e.after[i].scope == scope){
+ e.after.splice(i, 1);
+ return;
+ }
+ }
+ },
+
+ toggleEventLogging: function(toggle) {
+ Ext.util.Observable[toggle ? 'capture' : 'releaseCapture'](this, function(en) {
+ if (Ext.isDefined(Ext.global.console)) {
+ Ext.global.console.log(en, arguments);
+ }
+ });
+ }
+ };
+ }());
+});