Flex MX:TREE based on GroupingCollection2 datasource?

Question

I have an ArrayCollection that consists of VO objects derived from a database query. I have grouped this collection of objects using the GroupingCollection2 object, but cannot for the life of me figure out how to bind it correctly to my tree control. It only displays [object GrouingCollection2] in the tree container, but not the objects contained within the GroupingCollection2 object. Any idea on what I might be doing wrong?
Thanks!

Answer 1

Also, you can fetch the grouped data from GroupingCollection and assign that to the Tree control. For example -
         <mx:Script>
          <![CDATA[
               protected function button1_clickHandler(event:MouseEvent):void
                            gc.refresh();
                            tree.dataProvider = gc.getRoot();
          ]]>
     </mx:Script>
     <mx:GroupingCollection2 id="gc">
          <mx:source>
               <mx:ArrayCollection>
                    <mx:Object day="1" hour="1" Skill0="1"/>
                    <mx:Object day="1" hour="2" Skill0="1.5"/>
                    <mx:Object day="1" hour="3" Skill0=".25"/>
               </mx:ArrayCollection>
          </mx:source>
          <mx:grouping>
               <mx:Grouping label="day">
                    <mx:GroupingField name="day" />
               </mx:Grouping>
          </mx:grouping>
     </mx:GroupingCollection2>
     <mx:Tree labelField="day" id="tree" width="200" />
     <mx:Button label="Group" click="button1_clickHandler(event)" />