The source code

/** + * Base class that provides a common interface for publishing events. Subclasses are expected to to have a property + * "events" with all the events defined, and, optionally, a property "listeners" with configured listeners defined. + * + * For example: + * + * Ext.define('Employee', { + * 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. + * this.callParent(arguments) + * } + * }); + * + * This could then be used like this: + * + * 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!"); + * } + * } + * }); */ -EXTUTIL.Observable = function(){ -

/** - * @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.DataView DataView}'s - * {@link Ext.DataView#click click} event passing the node clicked on. To access DOM - * events directly from a Component's HTMLElement, listeners must be added to the {@link Ext.Component#getEl Element} after the Component - * has been rendered. A plugin can simplify this step:


-// Plugin is configured with a listeners config object.
-// The Component is appended to the argument list of all handler functions.
-Ext.DomObserver = Ext.extend(Object, {
-    constructor: function(config) {
-        this.listeners = config.listeners ? config.listeners : config;
+Ext.define('Ext.util.Observable', {
+
+    /* Begin Definitions */
+
+    requires: ['Ext.util.Event'],
+
+    statics: {
+        /**
+         * Removes **all** added captures from the Observable.
+         *
+         * @param {Ext.util.Observable} o The Observable to release
+         * @static
+         */
+        releaseCapture: function(o) {
+            o.fireEvent = this.prototype.fireEvent;
+        },
+
+        /**
+         * Starts capture on the specified Observable. All events will be passed to the supplied function with the event
+         * name + standard signature of the event **before** the event is fired. If the supplied function returns false,
+         * the event will not fire.
+         *
+         * @param {Ext.util.Observable} o The Observable to capture events from.
+         * @param {Function} fn The function to call when an event is fired.
+         * @param {Object} scope (optional) The scope (`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
+         */
+        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;
+            }
+        }
     },
 
-    // Component passes itself into plugin's init method
-    init: function(c) {
-        var p, l = this.listeners;
-        for (p in l) {
-            if (Ext.isFunction(l[p])) {
-                l[p] = this.createHandler(l[p], c);
-            } else {
-                l[p].fn = this.createHandler(l[p].fn, c);
-            }
+    /* End Definitions */
+
+    /**
+     * @cfg {Object} listeners
+     *
+     * 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 Ext JS {@link Ext.Component Components}**
+     *
+     * While _some_ Ext JS 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#itemclick itemclick}`** 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'); }
+     *             }
+     *         }
+     *     });
+     */
+    // @private
+    isObservable: true,
+
+    constructor: function(config) {
+        var me = this;
+
+        Ext.apply(me, config);
+        if (me.listeners) {
+            me.on(me.listeners);
+            delete me.listeners;
+        }
+        me.events = me.events || {};
+
+        if (me.bubbleEvents) {
+            me.enableBubble(me.bubbleEvents);
         }
+    },
 
-        // Add the listeners to the Element immediately following the render call
-        c.render = c.render.{@link Function#createSequence createSequence}(function() {
-            var e = c.getEl();
-            if (e) {
-                e.on(l);
+    // @private
+    eventOptionsRe : /^(?:scope|delay|buffer|single|stopEvent|preventDefault|stopPropagation|normalized|args|delegate|element|vertical|horizontal|freezeEvent)$/,
+
+    /**
+     * Adds listeners to any Observable object (or Ext.Element) which are automatically removed when this Component is
+     * destroyed.
+     *
+     * @param {Ext.util.Observable/Ext.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 (typeof ename !== 'string') {
+            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);
+        }
     },
 
-    createHandler: function(fn, c) {
-        return function(e) {
-            fn.call(this, e, c);
-        };
-    }
-});
+    /**
+     * Removes listeners that were added by the {@link #mon} method.
+     *
+     * @param {Ext.util.Observable/Ext.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,
+            length,
+            i;
+
+        if (typeof ename !== 'string') {
+            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);
+                    }
+                }
+            }
+        }
 
-var combo = new Ext.form.ComboBox({
+        managedListeners = me.managedListeners ? me.managedListeners.slice() : [];
 
-    // Collapse combo when its element is clicked on
-    plugins: [ new Ext.DomObserver({
-        click: function(evt, comp) {
-            comp.collapse();
+        for (i = 0, length = managedListeners.length; i < length; i++) {
+            me.removeManagedListenerItem(false, managedListeners[i], item, ename, fn, scope);
         }
-    })],
-    store: myStore,
-    typeAhead: true,
-    mode: 'local',
-    triggerAction: 'all'
-});
-     *

- */ - var me = this, e = me.events; - if(me.listeners){ - me.on(me.listeners); - delete me.listeners; - } - me.events = e || {}; -}; - -EXTUTIL.Observable.prototype = { - // private - filterOptRe : /^(?:scope|delay|buffer|single)$/, + }, -

/** - *

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}.

+ /** + * Fires the specified event with the passed parameters (minus the event name, plus the `options` object passed + * to {@link #addListener}). + * + * 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 a = TOARRAY(arguments), - ename = a[0].toLowerCase(), - me = this, - ret = TRUE, - ce = me.events[ename], - q, - c; - if (me.eventsSuspended === TRUE) { - if (q = me.eventQueue) { - q.push(a); + fireEvent: function(eventName) { + var name = eventName.toLowerCase(), + events = this.events, + event = events && events[name], + bubbles = event && event.bubble; + + return this.continueFireEvent(name, Ext.Array.slice(arguments, 1), bubbles); + }, + + /** + * Continue to fire event. + * @private + * + * @param {String} eventName + * @param {Array} args + * @param {Boolean} bubbles + */ + continueFireEvent: function(eventName, args, bubbles) { + var target = this, + queue, event, + ret = true; + + do { + if (target.eventsSuspended === true) { + if ((queue = target.eventQueue)) { + queue.push([eventName, args, bubbles]); + } + return ret; + } else { + event = target.events[eventName]; + // Continue bubbling if event exists and it is `true` or the handler didn't returns false and it + // configure to bubble. + if (event && event != true) { + if ((ret = event.fire.apply(event, args)) === false) { + break; + } + } } + } while (bubbles && (target = target.getBubbleParent())); + return ret; + }, + + /** + * Gets the bubbling parent for an Observable + * @private + * @return {Ext.util.Observable} The bubble parent. null is returned if no bubble target exists + */ + getBubbleParent: function(){ + var me = this, parent = me.getBubbleTarget && me.getBubbleTarget(); + if (parent && parent.isObservable) { + return parent; } - else if(ISOBJECT(ce) && ce.bubble){ - if(ce.fire.apply(ce, a.slice(1)) === FALSE) { - return FALSE; - } - c = me.getBubbleTarget && me.getBubbleTarget(); - if(c && c.enableBubble) { - if(!c.events[ename] || !Ext.isObject(c.events[ename]) || !c.events[ename].bubble) { - c.enableBubble(ename); + return null; + }, + + /** + * 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. + * @param {Function} fn The method the event invokes. Will be called with arguments given to + * {@link #fireEvent} plus the `options` parameter described below. + * @param {Object} [scope] The scope (`this` reference) in which the handler function is executed. **If + * omitted, defaults to the object which fired the event.** + * @param {Object} [options] An object containing handler configuration. + * + * **Note:** Unlike in ExtJS 3.x, the options object will also be passed as the last argument to every event handler. + * + * This object may contain any of the following properties: + * + * - **scope** : Object + * + * The scope (`this` reference) in which the handler function is executed. **If omitted, defaults to the object + * which fired the event.** + * + * - **delay** : Number + * + * The number of milliseconds to delay the invocation of the handler after the event fires. + * + * - **single** : Boolean + * + * True to add a handler to handle just the next firing of the event, and then remove itself. + * + * - **buffer** : Number + * + * Causes the handler to be scheduled to run in an {@link Ext.util.DelayedTask} delayed by the specified number of + * milliseconds. If the event fires again within that time, the original handler is _not_ invoked, but the new + * handler is scheduled in its place. + * + * - **target** : Observable + * + * Only call the handler if the event was fired on the target Observable, _not_ if the event was bubbled up from a + * child Observable. + * + * - **element** : String + * + * **This option is only valid for listeners bound to {@link Ext.Component Components}.** The name of a Component + * property which references an element to add a listener to. + * + * 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' + * } + * }); + * + * **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 + * }); + * + * One can also specify options for each event handler separately: + * + * myGridPanel.on({ + * cellClick: {fn: this.onCellClick, scope: this, single: true}, + * mouseover: {fn: panel.onMouseOver, scope: panel} + * }); + * + */ + addListener: function(ename, fn, scope, options) { + var me = this, + config, + event; + + if (typeof ename !== 'string') { + 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); + } } - return c.fireEvent.apply(c, a); } } else { - if (ISOBJECT(ce)) { - a.shift(); - ret = ce.fire.apply(ce, a); + 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 : {}); } - return ret; }, -

/** - * Appends an event handler to this object. - * @param {String} eventName The name of the event to listen for. - * @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:

scope : Object
The scope (this reference) in which the handler function is executed. - * If omitted, defaults to the object which fired the event.
delay : Number
The number of milliseconds to delay the invocation of the handler after the event fires.
single : Boolean
True to add a handler to handle just the next firing of the event, and then remove itself.
buffer : Number
Causes the handler to be scheduled to run in an {@link Ext.util.DelayedTask} delayed - * by the specified number of milliseconds. If the event fires again within that time, the original - * handler is not invoked, but the new handler is scheduled in its place.
target : Observable
Only call the handler if the event was fired on the target Observable, not - * if the event was bubbled up from a child Observable.

- *

- * Combining Options
- * Using the options argument, it is possible to combine different types of listeners:
- *
- * A delayed, one-time listener. - *


-myDataView.on('click', this.onClick, 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 handlers. - *

- *


-myGridPanel.on({
-'click' : {
-    fn: this.onClick,
-    scope: this,
-    delay: 100
-},
-'mouseover' : {
-    fn: this.onMouseOver,
-    scope: this
-},
-'mouseout' : {
-    fn: this.onMouseOut,
-    scope: this
-}
-});

- *

- * Or a shorthand syntax:
- *


-myGridPanel.on({
-'click' : this.onClick,
-'mouseover' : this.onMouseOver,
-'mouseout' : this.onMouseOut,
- scope: this
-});

+ /** + * Removes an event handler. + * + * @param {String} eventName The type of event the handler was associated with. + * @param {Function} fn 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. It must be the same as the + * scope argument specified in the original call to {@link #addListener} or the listener will not be removed. */ - addListener : function(eventName, fn, scope, o){ + removeListener: function(ename, fn, scope) { var me = this, - e, - oe, - isF, - ce; - if (ISOBJECT(eventName)) { - o = eventName; - for (e in o){ - oe = o[e]; - if (!me.filterOptRe.test(e)) { - me.addListener(e, oe.fn || oe, oe.scope || o.scope, oe.fn ? oe : o); + config, + event, + options; + + if (typeof ename !== 'string') { + 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 { - eventName = eventName.toLowerCase(); - ce = me.events[eventName] || TRUE; - if (Ext.isBoolean(ce)) { - me.events[eventName] = ce = new EXTUTIL.Event(me, eventName); + ename = ename.toLowerCase(); + event = me.events[ename]; + if (event && event.isEvent) { + event.removeListener(fn, scope); } - ce.addListener(fn, scope, ISOBJECT(o) ? o : {}); } }, -

/** - * 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. + /** + * Removes all listeners for this object including the managed listeners */ - removeListener : function(eventName, fn, scope){ - var ce = this.events[eventName.toLowerCase()]; - if (ISOBJECT(ce)) { - ce.removeListener(fn, scope); + 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(); + }, + + //<debug> + purgeListeners : function() { + if (Ext.global.console) { + Ext.global.console.warn('Observable: purgeListeners has been deprecated. Please use clearListeners.'); } + return this.clearListeners.apply(this, arguments); }, + //</debug> -

/** - * Removes all listeners for this object + /** + * Removes all managed listeners for this object. */ - purgeListeners : function(){ - var events = this.events, - evt, - key; - for(key in events){ - evt = events[key]; - if(ISOBJECT(evt)){ - evt.clearListeners(); + clearManagedListeners : function() { + var managedListeners = this.managedListeners || [], + i = 0, + len = managedListeners.length; + + for (; i < len; i++) { + this.removeManagedListenerItem(true, managedListeners[i]); + } + + this.managedListeners = []; + }, + + /** + * Remove a single managed listener item + * @private + * @param {Boolean} isClear True if this is being called during a clear + * @param {Object} managedListener The managed listener item + * See removeManagedListener for other args + */ + removeManagedListenerItem: function(isClear, managedListener, item, ename, fn, scope){ + if (isClear || (managedListener.item === item && managedListener.ename === ename && (!fn || managedListener.fn === fn) && (!scope || managedListener.scope === scope))) { + managedListener.item.un(managedListener.ename, managedListener.fn, managedListener.scope); + if (!isClear) { + Ext.Array.remove(this.managedListeners, managedListener); } } }, -

/** - * Adds the specified events to the list of events which this Observable may fire. - * @param {Object|String} o Either an object with event names as properties with a value of true - * or the first event name string if multiple event names are being passed as separate parameters. - * @param {string} Optional. Event name if multiple event names are being passed as separate parameters. - * Usage:


-this.addEvents('storeloaded', 'storecleared');
-

+ //<debug> + purgeManagedListeners : function() { + if (Ext.global.console) { + Ext.global.console.warn('Observable: purgeManagedListeners has been deprecated. Please use clearManagedListeners.'); + } + return this.clearManagedListeners.apply(this, arguments); + }, + //</debug> + + /** + * Adds the specified events to the list of events which this Observable may fire. + * + * @param {Object/String} o Either an object with event names as properties with a value of `true` or the first + * event name string if multiple event names are being passed as separate parameters. Usage: + * + * this.addEvents({ + * storeloaded: true, + * storecleared: true + * }); + * + * @param {String...} more (optional) Additional event names if multiple event names are being passed as separate + * parameters. Usage: + * + * this.addEvents('storeloaded', 'storecleared'); + * */ - addEvents : function(o){ - var me = this; - me.events = me.events || {}; + addEvents: function(o) { + var me = this, + args, + len, + i; + + me.events = me.events || {}; if (Ext.isString(o)) { - var a = arguments, - i = a.length; - while(i--) { - me.events[a[i]] = me.events[a[i]] || TRUE; + args = arguments; + i = args.length; + + while (i--) { + me.events[args[i]] = me.events[args[i]] || true; } } else { Ext.applyIf(me.events, o); } }, -

/** - * Checks to see if this object has any listeners for a specified event + /** + * Checks to see if this object has any listeners for a specified event + * * @param {String} eventName The name of the event to check for * @return {Boolean} True if the event is being listened for, else false */ - hasListener : function(eventName){ - var e = this.events[eventName]; - return ISOBJECT(e) && e.listeners.length > 0; + hasListener: function(ename) { + var event = this.events[ename.toLowerCase()]; + return event && event.isEvent === true && event.listeners.length > 0; }, -

/** - * Suspend the firing of all events. (see {@link #resumeEvents}) + /** + * Suspends the firing of all events. (see {@link #resumeEvents}) + * * @param {Boolean} queueSuspended Pass as true to queue up suspended events to be fired - * after the {@link #resumeEvents} call instead of discarding all suspended events; + * after the {@link #resumeEvents} call instead of discarding all suspended events. */ - suspendEvents : function(queueSuspended){ - this.eventsSuspended = TRUE; - if(queueSuspended && !this.eventQueue){ + suspendEvents: function(queueSuspended) { + this.eventsSuspended = true; + if (queueSuspended && !this.eventQueue) { this.eventQueue = []; } }, -

/** - * Resume firing events. (see {@link #suspendEvents}) - * If events were suspended using the queueSuspended parameter, then all - * events fired during event suspension will be sent to any listeners now. + /** + * Resumes firing events (see {@link #suspendEvents}). + * + * If events were suspended using the `queueSuspended` parameter, then all events fired + * during event suspension will be sent to any listeners now. */ - resumeEvents : function(){ + resumeEvents: function() { var me = this, - queued = me.eventQueue || []; - me.eventsSuspended = FALSE; - delete me.eventQueue; - EACH(queued, function(e) { - me.fireEvent.apply(me, e); - }); - } -}; - -var OBSERVABLE = EXTUTIL.Observable.prototype; -

/** - * Appends an event handler to this object (shorthand for {@link #addListener}.) - * @param {String} eventName The type of event to listen for - * @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. - * @method - */ -OBSERVABLE.on = OBSERVABLE.addListener; -

/** - * Removes an event handler (shorthand for {@link #removeListener}.) - * @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. - * @method - */ -OBSERVABLE.un = OBSERVABLE.removeListener; + queued = me.eventQueue; -

/** - * Removes all added captures from the Observable. - * @param {Observable} o The Observable to release - * @static - */ -EXTUTIL.Observable.releaseCapture = function(o){ - o.fireEvent = OBSERVABLE.fireEvent; -}; - -function createTargeted(h, o, scope){ - return function(){ - if(o.target == arguments[0]){ - h.apply(scope, TOARRAY(arguments)); - } - }; -}; - -function createBuffered(h, o, l, scope){ - l.task = new EXTUTIL.DelayedTask(); - return function(){ - l.task.delay(o.buffer, h, scope, TOARRAY(arguments)); - }; -}; - -function createSingle(h, e, fn, scope){ - return function(){ - e.removeListener(fn, scope); - return h.apply(scope, arguments); - }; -}; - -function createDelayed(h, o, l, scope){ - return function(){ - var task = new EXTUTIL.DelayedTask(); - if(!l.tasks) { - l.tasks = []; - } - l.tasks.push(task); - task.delay(o.delay || 10, h, scope, TOARRAY(arguments)); - }; -}; - -EXTUTIL.Event = function(obj, name){ - this.name = name; - this.obj = obj; - this.listeners = []; -}; - -EXTUTIL.Event.prototype = { - addListener : function(fn, scope, options){ - var me = this, - l; - scope = scope || me.obj; - if(!me.isListening(fn, scope)){ - l = me.createListener(fn, scope, options); - if(me.firing){ // if we are currently firing this event, don't disturb the listener loop - me.listeners = me.listeners.slice(0); - } - me.listeners.push(l); - } - }, + me.eventsSuspended = false; + delete me.eventQueue; - createListener: function(fn, scope, o){ - o = o || {}, scope = scope || this.obj; - var l = { - fn: fn, - scope: scope, - options: o - }, h = fn; - if(o.target){ - h = createTargeted(h, o, scope); - } - if(o.delay){ - h = createDelayed(h, o, l, scope); - } - if(o.single){ - h = createSingle(h, this, fn, scope); - } - if(o.buffer){ - h = createBuffered(h, o, l, scope); + if (queued) { + Ext.each(queued, function(e) { + me.continueFireEvent.apply(me, e); + }); } - l.fireFn = h; - return l; }, - findListener : function(fn, scope){ - var list = this.listeners, - i = list.length, - l, - s; - while(i--) { - l = list[i]; - if(l) { - s = l.scope; - if(l.fn == fn && (s == scope || s == this.obj)){ - return i; - } - } + /** + * 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 {String[]} events Array of event names to relay. + * @param {String} prefix + */ + 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)); } - return -1; }, - isListening : function(fn, scope){ - return this.findListener(fn, scope) != -1; + /** + * @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))); + }; }, - removeListener : function(fn, scope){ - var index, - l, - k, - me = this, - ret = FALSE; - if((index = me.findListener(fn, scope)) != -1){ - if (me.firing) { - me.listeners = me.listeners.slice(0); - } - l = me.listeners[index]; - if(l.task) { - l.task.cancel(); - delete l.task; - } - k = l.tasks && l.tasks.length; - if(k) { - while(k--) { - l.tasks[k].cancel(); + /** + * 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'); + * } + * } + * }); + * + * @param {String/String[]} events The event name to bubble, or an Array of event names. + */ + enableBubble: function(events) { + var me = this; + if (!Ext.isEmpty(events)) { + events = Ext.isArray(events) ? events: Ext.Array.toArray(arguments); + Ext.each(events, + function(ename) { + ename = ename.toLowerCase(); + var ce = me.events[ename] || true; + if (Ext.isBoolean(ce)) { + ce = new Ext.util.Event(me, ename); + me.events[ename] = ce; } - delete l.tasks; - } - me.listeners.splice(index, 1); - ret = TRUE; + ce.bubble = true; + }); } - return ret; - }, - - // Iterate to stop any buffered/delayed events - clearListeners : function(){ - var me = this, - l = me.listeners, - i = l.length; - while(i--) { - me.removeListener(l[i].fn, l[i].scope); + } +}, function() { + + this.createAlias({ + /** + * @method + * Shorthand for {@link #addListener}. + * @alias Ext.util.Observable#addListener + */ + on: 'addListener', + /** + * @method + * Shorthand for {@link #removeListener}. + * @alias Ext.util.Observable#removeListener + */ + un: 'removeListener', + /** + * @method + * Shorthand for {@link #addManagedListener}. + * @alias Ext.util.Observable#addManagedListener + */ + mon: 'addManagedListener', + /** + * @method + * Shorthand for {@link #removeManagedListener}. + * @alias Ext.util.Observable#removeManagedListener + */ + 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; } - }, - fire : function(){ - var me = this, - args = TOARRAY(arguments), - listeners = me.listeners, - len = listeners.length, - i = 0, - l; - - if(len > 0){ - me.firing = TRUE; - for (; i < len; i++) { - l = listeners[i]; - if(l && l.fireFn.apply(l.scope || me.obj || window, args) === FALSE) { - return (me.firing = FALSE); + 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){ + Ext.Array.erase(e.before, i, 1); + return; + } } + for(i = 0, len = e.after.length; i < len; i++){ + if(e.after[i].fn == fn && e.after[i].scope == scope){ + Ext.Array.erase(e.after, 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); + } + }); } - } - me.firing = FALSE; - return TRUE; - } -}; -})();