X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/2e847cf21b8ab9d15fa167b315ca5b2fa92638fc..6b044c28b5f26fb99c86c237ffad19741c0f7f3d:/src/util/Observable-more.js?ds=inline diff --git a/src/util/Observable-more.js b/src/util/Observable-more.js index 0a6578a8..2570e085 100644 --- a/src/util/Observable-more.js +++ b/src/util/Observable-more.js @@ -1,219 +1,226 @@ /*! - * Ext JS Library 3.1.1 - * Copyright(c) 2006-2010 Ext JS, LLC - * licensing@extjs.com - * http://www.extjs.com/license + * Ext JS Library 3.3.1 + * Copyright(c) 2006-2010 Sencha Inc. + * licensing@sencha.com + * http://www.sencha.com/license */ -/** - * @class Ext.util.Observable - */ -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 (!Ext.isEmpty(v = fn.apply(scope || obj, args))) { - if (Ext.isObject(v)) { - returnValue = !Ext.isEmpty(v.returnValue) ? v.returnValue : v; - cancel = !!v.cancel; - } - else - if (v === false) { - cancel = true; - } - else { - returnValue = v; - } - } - }; - - this[method] = function(){ - var args = Ext.toArray(arguments); - returnValue = v = undefined; - cancel = false; - - Ext.each(e.before, function(b){ - makeCall(b.fn, b.scope, args); - if (cancel) { - return returnValue; - } - }); - - if (!Ext.isEmpty(v = e.originalFn.apply(obj, args))) { - returnValue = v; - } - Ext.each(e.after, function(a){ - makeCall(a.fn, a.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 = getMethodEvent.call(this, method), found = false; - Ext.each(e.before, function(b, i, arr){ - if (b.fn == fn && b.scope == scope) { - arr.splice(i, 1); - found = true; - return false; - } - }); - if (!found) { - Ext.each(e.after, function(a, i, arr){ - if (a.fn == fn && a.scope == scope) { - arr.splice(i, 1); - return false; - } - }); - } - }, - - /** - * Relays selected events from the specified Observable as if the events were fired by this. - * @param {Object} o The Observable whose events this object is to relay. - * @param {Array} events Array of event names to relay. - */ - relayEvents : function(o, events){ - var me = this; - function createHandler(ename){ - return function(){ - return me.fireEvent.apply(me, [ename].concat(Ext.toArray(arguments))); - }; - } - Ext.each(events, function(ename){ - me.events[ename] = me.events[ename] || true; - o.on(ename, createHandler(ename), me); - }); - }, - - /** - *

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, {
-    //  Add functionality to Field's initComponent to enable the change event to bubble
-    initComponent : Ext.form.Field.prototype.initComponent.createSequence(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/Array} 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.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; - } - ce.bubble = true; - }); - } - } - }; -}()); - - -/** - * 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 {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 - */ -Ext.util.Observable.capture = function(o, fn, scope){ - o.fireEvent = o.fireEvent.createInterceptor(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.observeClass(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 - */ -Ext.util.Observable.observeClass = function(c, listeners){ - if(c){ - if(!c.fireEvent){ - Ext.apply(c, new Ext.util.Observable()); - Ext.util.Observable.capture(c.prototype, c.fireEvent, c); - } - if(Ext.isObject(listeners)){ - c.on(listeners); - } - return c; - } -}; \ No newline at end of file +/** + * @class Ext.util.Observable + */ +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; + returnValue = v = undefined; + cancel = false; + + for(var 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(var 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); + for(var 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(var 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; + } + } + }, + + /** + * Relays selected events from the specified Observable as if the events were fired by this. + * @param {Object} o The Observable whose events this object is to relay. + * @param {Array} events Array of event names to relay. + */ + relayEvents : function(o, events){ + var me = this; + function createHandler(ename){ + return function(){ + return me.fireEvent.apply(me, [ename].concat(Array.prototype.slice.call(arguments, 0))); + }; + } + for(var i = 0, len = events.length; i < len; i++){ + var ename = events[i]; + me.events[ename] = me.events[ename] || true; + o.on(ename, createHandler(ename), me); + } + }, + + /** + *

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, {
+    //  Add functionality to Field's initComponent to enable the change event to bubble
+    initComponent : Ext.form.Field.prototype.initComponent.createSequence(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/Array} 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 : Array.prototype.slice.call(arguments, 0); + for(var i = 0, len = events.length; i < len; i++){ + var ename = events[i]; + ename = ename.toLowerCase(); + var ce = me.events[ename] || true; + if (typeof ce == 'boolean') { + ce = new Ext.util.Event(me, ename); + me.events[ename] = ce; + } + ce.bubble = true; + } + } + } + }; +}()); + + +/** + * 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 {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 + */ +Ext.util.Observable.capture = function(o, fn, scope){ + o.fireEvent = o.fireEvent.createInterceptor(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.observeClass(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 + */ +Ext.util.Observable.observeClass = function(c, listeners){ + if(c){ + if(!c.fireEvent){ + Ext.apply(c, new Ext.util.Observable()); + Ext.util.Observable.capture(c.prototype, c.fireEvent, c); + } + if(typeof listeners == 'object'){ + c.on(listeners); + } + return c; + } +};