Typically, this is done via a customized ITreeDataDescriptor. It should always return true for isBranch and hasChildren, and return an empty ArrayCollection for getChildren that you fill later with the actual children.
From: [email protected] [mailto:[email protected]] On Behalf Of Dan Vega Sent: Friday, December 19, 2008 7:35 PM To: [email protected] Subject: [flexcoders] Tree problems I am still having some tree / array issues that I am hoping to get some help on. My tree loads an array of data that looks like this. Items with a children array tell me that this folder should be a branch and it has children. When you click on the branch I want to go retrieve the list of directories for that folder and update the array with the new directory data. (Array)#0 [0] (Object)#1 lastModified = 1225560062218 name = "bin" parent = "H:\JRun4" path = "H:\JRun4\bin" [1] (Object)#2 children = (Array)#3 lastModified = 1186192523437 name = "docs" parent = "H:\JRun4" path = "H:\JRun4\docs" My itemOpen listener event basically get the path of the folder being opened and fetch the directories for that path. private function onItemOpen(event:TreeEvent):void { var path:String = event.item.path; holder = event.item.children; FileManager.getDirectories(path); } When the list of directories is called this method is the result handler. IF the tree data provider is null we know its top level. What I thought I could do is setup a variable called holder that would the array object of the item above. I thought this would pass the reference of that object and using that reference i could set the new dirs into that empty array. This is not really working so I was wondering if anyone has some ideas or what the right approach should be. private function listDirectories(event:ResultEvent):void { var dirs:Array = event.result as Array; // if the _directories array is null this is our root request if(_directories == null) { _directories = dirs; }else { // what do we do now? holder = dirs; } } Thanks for the help! Thank You Dan Vega [email protected]<mailto:[email protected]> http://www.danvega.org
