/*! - * Ext JS Library 3.0.3 - * Copyright(c) 2006-2009 Ext JS, LLC + * Ext JS Library 3.3.0 + * Copyright(c) 2006-2010 Ext JS, Inc. * licensing@extjs.com * http://www.extjs.com/license */ -/** - * @class Ext.direct.PollingProvider - * @extends Ext.direct.JsonProvider - * - *+/** + * @class Ext.direct.PollingProvider + * @extends Ext.direct.JsonProvider + * + *Provides for repetitive polling of the server at distinct {@link #interval intervals}. - * The initial request for data originates from the client, and then is responded to by the - * server.
- * - *All configurations for the PollingProvider should be generated by the server-side - * API portion of the Ext.Direct stack.
- * - *An instance of PollingProvider may be created directly via the new keyword or by simply - * specifying type = 'polling'. For example:
- *- */ -Ext.direct.PollingProvider = Ext.extend(Ext.direct.JsonProvider, { - /** - * @cfg {Number} priority - * Priority of the request (defaults to 3). See {@link Ext.direct.Provider#priority}. - */ - // override default priority - priority: 3, - - /** - * @cfg {Number} interval - * How often to poll the server-side in milliseconds (defaults to 3000 - every - * 3 seconds). - */ - interval: 3000, - - /** - * @cfg {Object} baseParams An object containing properties which are to be sent as parameters - * on every polling request - */ - - /** - * @cfg {String/Function} url - * The url which the PollingProvider should contact with each request. This can also be - * an imported Ext.Direct method which will accept the baseParams as its only argument. - */ - - // private - constructor : function(config){ - Ext.direct.PollingProvider.superclass.constructor.call(this, config); - this.addEvents( - /** - * @event beforepoll - * Fired immediately before a poll takes place, an event handler can return false - * in order to cancel the poll. - * @param {Ext.direct.PollingProvider} - */ - 'beforepoll', - /** - * @event poll - * This event has not yet been implemented. - * @param {Ext.direct.PollingProvider} - */ - 'poll' - ); - }, - - // inherited - isConnected: function(){ - return !!this.pollTask; - }, - - /** - * Connect to the server-side and begin the polling process. To handle each - * response subscribe to the data event. - */ - connect: function(){ - if(this.url && !this.pollTask){ - this.pollTask = Ext.TaskMgr.start({ - run: function(){ - if(this.fireEvent('beforepoll', this) !== false){ - if(typeof this.url == 'function'){ - this.url(this.baseParams); - }else{ - Ext.Ajax.request({ - url: this.url, - callback: this.onData, - scope: this, - params: this.baseParams - }); - } - } - }, - interval: this.interval, - scope: this - }); - this.fireEvent('connect', this); - }else if(!this.url){ - throw 'Error initializing PollingProvider, no url configured.'; - } - }, - - /** - * Disconnect from the server-side and stop the polling process. The disconnect - * event will be fired on a successful disconnect. - */ - disconnect: function(){ - if(this.pollTask){ - Ext.TaskMgr.stop(this.pollTask); - delete this.pollTask; - this.fireEvent('disconnect', this); - } - }, - - // private - onData: function(opt, success, xhr){ - if(success){ - var events = this.getEvents(xhr); - for(var i = 0, len = events.length; i < len; i++){ - var e = events[i]; - this.fireEvent('data', this, e); - } - }else{ - var e = new Ext.Direct.ExceptionEvent({ - data: e, - code: Ext.Direct.exceptions.TRANSPORT, - message: 'Unable to connect to the server.', - xhr: xhr - }); - this.fireEvent('data', this, e); - } - } -}); - -Ext.Direct.PROVIDERS['polling'] = Ext.direct.PollingProvider;-var pollA = new Ext.direct.PollingProvider({ - type:'polling', - url: 'php/pollA.php', -}); -Ext.Direct.addProvider(pollA); -pollA.disconnect(); - -Ext.Direct.addProvider( - { - type:'polling', - url: 'php/pollB.php', - id: 'pollB-provider' - } -); -var pollB = Ext.Direct.getProvider('pollB-provider'); - *
Provides for repetitive polling of the server at distinct {@link #interval intervals}. + * The initial request for data originates from the client, and then is responded to by the + * server.
+ * + *All configurations for the PollingProvider should be generated by the server-side + * API portion of the Ext.Direct stack.
+ * + *An instance of PollingProvider may be created directly via the new keyword or by simply + * specifying type = 'polling'. For example:
+ *
+var pollA = new Ext.direct.PollingProvider({
+ type:'polling',
+ url: 'php/pollA.php',
+});
+Ext.Direct.addProvider(pollA);
+pollA.disconnect();
+
+Ext.Direct.addProvider(
+ {
+ type:'polling',
+ url: 'php/pollB.php',
+ id: 'pollB-provider'
+ }
+);
+var pollB = Ext.Direct.getProvider('pollB-provider');
+ *