Trees use hierarchical data, take a top-level flat collection, and use the dataDescriptor to get children collections. A custom datadescriptor can apply a filter to the children collections, and even apply different filters to different children collections. In Moxie, there should be a HierarchicalCollection that supports filtering.
________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of TJ Downes Sent: Tuesday, October 16, 2007 11:22 AM To: [email protected] Subject: [flexcoders] Re: searching or filtering a tree Chris, did you find a solution for this problem? --- In [email protected] <mailto:flexcoders%40yahoogroups.com> , "zenwarden" <[EMAIL PROTECTED]> wrote: > > Ignore the comment below. It is acceptable (at least in a hack) to > always return true. > > Sadly, this code example is not working, but it has put me on the > right trail. > > Thanks. > > Chris > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com> , "zenwarden" <cwarden@> wrote: > > > > How does this work? You are always returning true. > > > > > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com> , "dwischusen" <dwischusen@> wrote: > > > > > > Hi Chris, > > > > > > Yes, if you want a filterFunction to work on hierarchical data then > > > you will need to override refresh(). The following class is a bit of > > > a hack, but it does work: > > > > > > > > > public class FilterCollection extends XMLListCollection > > > { > > > public function FilterCollection(source:XMLList):void > > > { > > > super(source); > > > } > > > > > > override public function refresh():Boolean > > > { > > > this.localIndex = this.toArray(); > > > > > > var copy:XMLListCollection = new > > > XMLListCollection(XMLList(this.toXMLString())); > > > > > > doFilter(this.filterFunction, copy.children()); > > > function doFilter(filterFunc:Function, items:XMLList):void > > > { > > > var len:int = items.length(); > > > for (var i:int = len-1; i >= 0; i--) > > > { > > > var childList:XMLList = items[i].children(); > > > if (!filterFunc(items[i])) > > > { > > > delete items[i]; > > > } > > > if (childList.length() > 0) > > > { > > > doFilter(filterFunc, childList); > > > } > > > > > > } > > > } > > > > > > this.localIndex = copy.toArray(); > > > return true; > > > } > > > } > > > > > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com> , "zenwarden" <cwarden@> wrote: > > > > > > > > I have a type in the msg. below it should be Tree control not IEEE. > > > > > > > > > > > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com> , "zenwarden" <cwarden@> wrote: > > > > > > > > > > Hi, > > > > > > > > > > I have a IEEE control that I wish to make searchable. I found > a good > > > > > example of Filtering Data In Flex at the forta blog. > > > > > See: > > > > > http://www.forta.com/blog/index.cfm/2006/7/13/Filtering-Data-In-Flex. <http://www.forta.com/blog/index.cfm/2006/7/13/Filtering-Data-In-Flex.> > > > > > > > > > > When I tried to apply this to a tree I found that the filter > > function > > > > > only iterates over the top level nodes of an XMLListCollection. > > > > > > > > > > Does this mean I have to overwrite refresh() in XMLListCollection? > > > > > That's not a trivial task. > > > > > > > > > > Does anyone have any suggestions or experience with this? > > > > > > > > > > Chris > > > > > > > > > > > > > > >
