Try passing your arraycollection in as a argument to your find_roots function. The function will then get called whenever the paramter is altered.
--- In [email protected], "alexandermaccaw" <[EMAIL PROTECTED]> wrote: > > I'm trying to populate a tree from a flat (non hierachial in the > normal sense) array collection. This is made up of lots of objects in > the form of FolderVO's. Now folders have parents ('parent-id') and I > want to reflect that in the tree. So I have this function: > public function get children():ArrayCollection { > var c:ArrayCollection = new ArrayCollection(model.folders.source); > c.filterFunction = function(item:Object):Boolean { > return (item.parent_id == id); > }; > c.refresh(); > return c; > } > > And I also want to find roots: > public static function find_roots():ArrayCollection { > var roots:ArrayCollection = new ArrayCollection(model.folders.source); > roots.filterFunction = function(item:Object):Boolean { > return (item.parent_id == 0); > }; > roots.refresh(); > return roots; > } > > Now, both these functions work and return the right values and I can > set the tree's data provider to FolderVO.find_roots(). > However, when model.folders is updated or any of the nodes in it, > children or find_roots isn't called, even though model.folders is > bindable. Is there something I'm missing? I've tried using Paul's > observer tag: > http://weblogs.macromedia.com/paulw/archives/2006/05/the_worlds_smal.cfm > And it works to a certain extent. When model.folders is completely > flushed (deleted and added) it's called (and all the folders in the > tree collapse again!). However when a single folder in model.folders > is edited/deleted, it's not. > > Any ideas, keep in mind I'd rather not rebuild the tree every time > something is CRUDed? I have a feeling that root_folders and children > aren't binding to model.folders properly. >
