Just wanted to confirm that you were able to implement your own ICollectionView/IViewCursor in the end. Also, I’m curious if you know how much progress Adobe has made in cleaning up the issues you ran into above.

Thanks,
Noah V

I owe you one!

One problem I see off the bat is that your code doesn’t apply “Rule 2: Always return the same identical object from a call to getChildren() for a given value of the node argument.” Because you’re calling new ArrayCollection() every time, this would tend to throw off the bookkeeping inside Tree.

It would be easier for you if the collections inside your nodes (.circulars, .pages, etc.) were already instances of ArrayCollection. Then you wouldn’t have to wrap them in anything.

You weren’t specific about what “previously loaded” data meant, but the other thing I’d do is make absolutely sure that the events that fire when your loading operation completes are passing back the correct, newly loaded data set. There might be a problem in there somewhere. That’s beyond the scope of what I could help with though.

public function getChildren(node:Object, model:Object=null):ICollectionView
{
if (node is EnvironmentVO)
return ICollectionView(new ArrayCollection(EnvironmentVO(node).circulars));
if (node is CircularVO)
return ICollectionView(new ArrayCollection(CircularVO(node).pages));
if (node is PageVO)
return ICollectionView(new ArrayCollection(PageVO(node).items));
return null;
}
public function hasChildren(node:Object, model:Object=null):Boolean
{
if (node is EnvironmentVO) return true;
if (node is CircularVO)
{
if (CircularVO(node).pages.length==0){
CircularVO(node).pages.push(new PageVO({name:’loading’}));
var cmd:CmdEvent = new CmdEvent(Controller.EVENT_DataLoadPageList);
cmd.data = CircularVO(node);
Controller.getInstance().executeCommand(cmd);
return false;
}else if (CircularVO(node).pages.length==1){
if (PageVO(CircularVO(node).pages[0]).name==”loading”)
return false;
}
return true;
}
if (node is PageVO) return true; // Got To Get The Top Level Working First!!
if (node is ItemVO) return false;
return false;
}
public function isBranch(node:Object, model:Object=null):Boolean
{
if (node is EnvironmentVO) return true;
if (node is CircularVO) return true;
if (node is PageVO) return true;
if (node is ItemVO) return false;
return false;
}

I am trying to create a dinamic tree, but i just can get it to work. Can someone please post the code here, not everything but just the way i can handle results and insert them to my tree component. Btw, i got it to work with addChildAt, but it works if my result only has one XML row like “”.

thx in advanced

I did have to add a call to invalidateList() to get the expanded branch to refresh the display, revealing the newly added node(s):

Tree(event.target).dataDescriptor.addChildAt(selectedResultNode,{label:”item1 child”},0);
Tree(event.target).invalidateList();

You are using XMLListCollection, and we are using an ArrayCollection (or something like it). Perhaps that explains why you need your “lonely node” for the tree to work correctly. We didn’t seem to need such a node.

There are still some bugs in Tree that can occur when scrolling around as data is added. Overall it is still in a delicate condition and I don’t think this control is completely solid yet.