Alien-Web-ExtJS-V3
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  <pre class="prettyprint lang-js"><span id='Ext-tree-AsyncTreeNode-method-constructor'><span id='Ext-tree-AsyncTreeNode-cfg-loader'><span id='Ext-tree-AsyncTreeNode'>/**
</span></span></span> * @class Ext.tree.AsyncTreeNode
 * @extends Ext.tree.TreeNode
 * @cfg {TreeLoader} loader A TreeLoader to be used by this node (defaults to the loader defined on the tree)
 * @constructor
 * @param {Object/String} attributes The attributes/config for the node or just a string with the text for the node 
 */
 Ext.tree.AsyncTreeNode = function(config){
    this.loaded = config &amp;&amp; config.loaded === true;
    this.loading = false;
    Ext.tree.AsyncTreeNode.superclass.constructor.apply(this, arguments);
<span id='Ext-tree-AsyncTreeNode-event-beforeload'>    /**
</span>    * @event beforeload
    * Fires before this node is loaded, return false to cancel
    * @param {Node} this This node
    */
    this.addEvents('beforeload', 'load');
<span id='Ext-tree-AsyncTreeNode-event-load'>    /**
</span>    * @event load
    * Fires when this node is loaded
    * @param {Node} this This node
    */
<span id='Ext-tree-AsyncTreeNode-property-loader'>    /**
</span>     * The loader used by this node (defaults to using the tree's defined loader)
     * @type TreeLoader
     * @property loader
     */
};
Ext.extend(Ext.tree.AsyncTreeNode, Ext.tree.TreeNode, {
    expand : function(deep, anim, callback, scope){
        if(this.loading){ // if an async load is already running, waiting til it's done
            var timer;
            var f = function(){
                if(!this.loading){ // done loading
                    clearInterval(timer);
                    this.expand(deep, anim, callback, scope);
                }
            }.createDelegate(this);
            timer = setInterval(f, 200);
            return;
        }
        if(!this.loaded){
            if(this.fireEvent(&quot;beforeload&quot;, this) === false){
                return;
            }
            this.loading = true;
            this.ui.beforeLoad(this);



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