If im not mistaken, debuggin through GroupingCollection, the part where it actually creates the subgrouped nodes (or leaf nodes), you will notice sort is not used on those sub array collections. GC is a really worthwhile class to understand if you are dealing with hierarchical data, it's overwhelming at first but stick to it. You might have to tweak it a bit to force it to sort the sub collections.
I'm using quite large groups at times and actually took GC2 from Flex 4. So far so good, there is nothing Flex 4 specific about that class. -Tom (http://tomek.me) --- In [email protected], Tom McNeer <tmcn...@...> wrote: > > Hi, > > I have read posts in this group, as well as many blog entries, regarding the > frequent need to manually sort the items in an AdvancedDataGrid when the > underlying data changes. ((I'm using SDK 3.5.) > > And I have instances of the ADG where I have, in fact, successfully created > and used a sort that fires when the underlying data provider changes. > > But I've got one now that just doesn't want to work, and I think the problem > must lie somehow in the grouping that goes on after the data provider is > refreshed. > > In short, here's the scenario. I have an ArrayCollection that represents a > flat data hierarchy. In each item of the AC, there is a ProcedureID. There > may be multiple Items for a Procedure, so you may typically have four or > five items in the AC with the same ProcedureID, but differing ItemIDs. > > The GroupingCollection is set around the ProcedureID, and the idea is that > the sort should be on the ProcedureID descending. > > Here's the sort function that fires on data change. The GroupingCollection > is "rc." The ADG is "requestGrid." > ------------------------------------ > > public function refreshGrid(e:Event):void{ > rc.refresh(); > requestGrid.validateNow(); > var sort:Sort = new Sort(); > sort.fields = [new SortField("ProcedureID",false,true)]; > IHierarchicalCollectionView(requestGrid.dataProvider).sort = > sort; > IHierarchicalCollectionView(requestGrid.dataProvider).refresh(); > } > > ------------------------------------ > > When I step through this in the debugger, I can see that the sort is created > correctly, and that the data provider is sorted and refreshed. But then the > grid shows its contents in an apparently random order. The parent-child > items in the grid are grouped correctly, but the ordering is incorrect. > > Can someone suggest how to troubleshoot this further, please? > > -- > Thanks, > > Tom > > Tom McNeer > MediumCool > http://www.mediumcool.com > 1735 Johnson Road NE > Atlanta, GA 30306 > 404.589.0560 >
