Try applying the filter to each child collection.
________________________________ From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of hpeter96 Sent: Friday, June 13, 2008 6:13 AM To: flexcoders@yahoogroups.com Subject: [flexcoders] Help with updating a Tree when its dataprovider has changed. I'm working on a tree control that has an XMLListCollection as its dataprovider. The dataprovider has a couple of branches and nodes that sort of look like this : Company | |-- Department |-- Person |-- Person |-- etc.. | |-- Department |-- Person |-- Person |-- etc.. | |-- Person |-- Person |! -- etc.. I'd like to have each Person node appear in the Tree depending on a 'visibility' flag. So if it is set, then the Person node would appear and if its not set, then the Person node won't appear. What I have right now is each Person node has an attribute called 'visibility' and when it is set to 'ModuleConstants.VISIBILITY_NONE', the tree's dataDescriptor removes them from the list with this override : // ------------------------------------------------------------------------ - override public function getChildren(node:Object, model:Object = null):ICollectionView { var childrenCollection:ICollectionView; var myCursor:IViewCursor;// = childrenCollection.createCursor(); childrenCo! llection = super.getChildren(node, model); if(childrenCollection != null) { myCursor = childrenCollection.createCursor(); while(!myCursor.afterLast) { // check to see if we want to show this node or not if(Number(myCursor.current.attribute("visibility")) == ModuleConstants.VISIBILITY_NONE) { myCursor.remove(); &nb! sp; } else { myCursor.moveNext(); } } } return childrenCollection; } // END OF getChildren() // ------------------------------------------------------------------------ - When I want to show or remove a Person node during runtime, I have a function that : - goes to the specific Department branch and remove all the people nodes underneath it. - ! adds all of the Person nodes again, but sets the visibility fl! ag for t he Person nodes I want to appear. - calls the tree's invalidateList() and validateNow() functions respectively. This works fine for short lists, but once the Tree gets long enough that a vertical is needed, the tree control starts messing up the data and doesn't show all of the nodes. Department branches start disappearing and duplicates start appearing and disappearing - all a huge mess. I did a trace on the dataProvider (the XMLListCollection) and that is showing me the correct data - so it seems like the tree is the one having trouble keeping up with all these changes. Originally I wanted to filter out the Person nodes with the XMLListCollection's filterFunction, but the filterFilter seems to only work on objects at the top level of the hierarchy, which seems to be a huge limitation. Can anyone help me out ?
