Question

I am using a Tree control with an XMLListContainer dataProvider…. I use an itemOpen event with the following code to update another data provider when a tree folder is opened (using small triangle) – the data provider contains all the <slide /> elements in that particular tree folder…

private function itemOpenEvent(event:TreeEvent):void {            slideDP = new XMLListCollection(event.item.elements('slide'));    slideDP.refresh();                      } 

If a second folder is opened thumbDP updates fine but when the first folder (or another closed folder) is clicked I want the same behaviour to happen (currently you have to close and reopen the first folder)

So I use a itemClick event – but this fires a ListEvent and I can’t work out how to get the child elements from the XMLListContainer as easy… The code below throws an out of bounds exception

private function itemClickEvent(event:ListEvent):void {           treeFeed.getItemAt(event.rowIndex);                         } 

Can anyone help? Thanks 🙂

Answer 1

I would change your event listener to listen for a change Event, and use the selectedItem property of the Tree:

private function changeHandler(event:ListEvent):void {                       slideDP = new XMLListCollection(tree.selectedItem.elements('slide'));      slideDP.refresh();                            } 

You may need to cast selectedItem as XML or XMLList.