59 lines
1.9 KiB
JavaScript
59 lines
1.9 KiB
JavaScript
YAHOO.ext.tree.AsyncTreeNode = function(config){
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this.loaded = false;
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this.loading = false;
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YAHOO.ext.tree.AsyncTreeNode.superclass.constructor.apply(this, arguments);
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this.events['beforeload'] = true;
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this.events['load'] = true;
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};
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YAHOO.extendX(YAHOO.ext.tree.AsyncTreeNode, YAHOO.ext.tree.TreeNode, {
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expand : function(deep, anim, callback){
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if(this.loading){ // if an async load is already running, waiting til it's done
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var timer;
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var f = function(){
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if(!this.loading){ // done loading
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clearInterval(timer);
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this.expand(deep, anim, callback);
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}
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}.createDelegate(this);
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timer = setInterval(f, 200);
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}
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if(!this.loaded){
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if(this.fireEvent('beforeload', this) === false){
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return;
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}
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this.loading = true;
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this.ui.beforeLoad(this);
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var loader = this.loader || this.attributes.loader || this.getOwnerTree().getLoader();
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if(loader){
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loader.load(this, this.loadComplete.createDelegate(this, [deep, anim, callback]));
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return;
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}
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}
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YAHOO.ext.tree.AsyncTreeNode.superclass.expand.call(this, deep, anim, callback);
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},
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isLoading : function(){
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return this.loading;
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},
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loadComplete : function(deep, anim, callback){
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this.loading = false;
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this.loaded = true;
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this.ui.afterLoad(this);
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this.fireEvent('load', this);
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this.expand(deep, anim, callback);
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},
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isLoaded : function(){
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return this.loaded;
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},
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hasChildNodes : function(){
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if(!this.isLeaf() && !this.loaded){
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return true;
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}else{
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return YAHOO.ext.tree.AsyncTreeNode.superclass.hasChildNodes.call(this);
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}
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}
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});
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