How do I listen for change in the global position of a Node

Question

Hi there,
I want to create a Wire/Connection node between two scene nodes. I want this Wire node to be updated when one of the nodes is moving. In the common scenario I would listen for change events in the target nodes position and update the Wire :
targetNode1.translateXProperty().addListener(new ChangeListener<Number>() {
public void changed(ObservableValue value, Number oldValue, Number newValue) {             
wire.setStartX(targetNode1.getTranslateX());
wire.setStartX(targetNode1.getTranslateY());
wire.setEndX(targetNode2.getTranslateX());
wire.setEndY(targetNode2.getTranslateY());
The problem is that the target nodes are children of another container nodes(that are actually moving). So listening for change events in the translate properties of the target nodes does not work(their parent nodes are actually moving)
Is there way to listent for change in the global position of the target nodes relative to the Scene?

Answer 1

It sounds very similar to a problem I posted about earlier...
How to implement a UI similar to a UML Diagram with connections?
I ended up making my own special bounds property, that updates when the parent's special bounds property changes.
I also had to listen to the parentProperty change event to add/remove my listener on the parent node.
All in all, a pain in the butt. There should be an easier way.
The shortcoming of the solution is that all the nodes in the hierarchy must have my special bounds property implemented (ie. they're all classes under my codebase such that I can implement it), which for the moment is true... I'd like a cleaner solution however.