1 files changed, 58 insertions, 0 deletions

diff --git a/frontend/beta/js/YUI-extensions/tree/AsyncTreeNode.js b/frontend/beta/js/YUI-extensions/tree/AsyncTreeNode.js
new file mode 100644
index 0000000..5d48b00
--- a/dev/null
+++ b/frontend/beta/js/YUI-extensions/tree/AsyncTreeNode.js
@@ -0,0 +1,58 @@
+YAHOO.ext.tree.AsyncTreeNode = function(config){

+    this.loaded = false;

+    this.loading = false;

+    YAHOO.ext.tree.AsyncTreeNode.superclass.constructor.apply(this, arguments);

+    this.events['beforeload'] = true;

+    this.events['load'] = true;

+};

+YAHOO.extendX(YAHOO.ext.tree.AsyncTreeNode, YAHOO.ext.tree.TreeNode, {

+    expand : function(deep, anim, callback){

+        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);

+                }

+            }.createDelegate(this);

+            timer = setInterval(f, 200);

+        }

+        if(!this.loaded){

+            if(this.fireEvent('beforeload', this) === false){

+                return;

+            }

+            this.loading = true;

+            this.ui.beforeLoad(this);

+            var loader = this.loader || this.attributes.loader || this.getOwnerTree().getLoader();

+            if(loader){

+                loader.load(this, this.loadComplete.createDelegate(this, [deep, anim, callback]));

+                return;

+            }

+        }

+        YAHOO.ext.tree.AsyncTreeNode.superclass.expand.call(this, deep, anim, callback);

+    },

+    

+    isLoading : function(){

+        return this.loading;  

+    },

+    

+    loadComplete : function(deep, anim, callback){

+        this.loading = false;

+        this.loaded = true;

+        this.ui.afterLoad(this);

+        this.fireEvent('load', this);

+        this.expand(deep, anim, callback);

+    },

+    

+    isLoaded : function(){

+        return this.loaded;

+    },

+    

+    hasChildNodes : function(){

+        if(!this.isLeaf() && !this.loaded){

+            return true;

+        }else{

+            return YAHOO.ext.tree.AsyncTreeNode.superclass.hasChildNodes.call(this);

+        }

+    }

+});