1) I call disableAutoUpdate() on an ADG's dataProvider (an ArrayCollection added as mx:HierarchicalData).
2) I add a thousand items to the grid. 3a) If I now call items.enableAutoUpdate(), things work fine, but the refresh takes a really long time, because a thousand events are fired. There's actually a comment in the ListCollectionView code saying this might be a problem. 3b) So instead, I call refresh() on the ArrayCollection. The thousand items get added very quickly, but the grid has no vertical scrollbar. I can tell the items are there, because a few of them appear when I resize the grid. In ListCollectionView.internalRefresh(), it looks like very little happens unless there's a sort or filter function. The pending updates queue is deleted, and a COLLECTION_CHANGE event is dispatched. Maybe that's enough... Is there anything I can do about this? Is there a function which will specificall recalculate and render the scrollbar? Or do I have to optimize ListCollectionView.handlePendingUpdates myself?
