50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
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/*
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* Ext JS Library 2.3.0
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* Copyright(c) 2006-2009, Ext JS, LLC.
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* licensing@extjs.com
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*
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* http://extjs.com/license
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*/
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/**
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* @class Ext.data.DataProxy
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* @extends Ext.util.Observable
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* This class is an abstract base class for implementations which provide retrieval of
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* unformatted data objects.<br>
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* <p>
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* DataProxy implementations are usually used in conjunction with an implementation of Ext.data.DataReader
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* (of the appropriate type which knows how to parse the data object) to provide a block of
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* {@link Ext.data.Records} to an {@link Ext.data.Store}.<br>
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* <p>
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* Custom implementations must implement the load method as described in
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* {@link Ext.data.HttpProxy#load}.
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*/
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Ext.data.DataProxy = function(){
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this.addEvents(
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/**
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* @event beforeload
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* Fires before a network request is made to retrieve a data object.
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* @param {Object} this
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* @param {Object} params The params object passed to the {@link #load} function
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*/
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'beforeload',
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/**
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* @event load
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* Fires before the load method's callback is called.
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* @param {Object} this
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* @param {Object} o The data object
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* @param {Object} arg The callback's arg object passed to the {@link #load} function
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*/
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'load'
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);
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Ext.data.DataProxy.superclass.constructor.call(this);
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};
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Ext.extend(Ext.data.DataProxy, Ext.util.Observable, {
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/**
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* Destroys the proxy by purging any event listeners and cancelling any active requests.
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*/
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destroy: function(){
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this.purgeListeners();
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}
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});
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