Monitoring visibility on screen of component

Hey all,
I have a component that is part of a complex component hierarchy, and I would like to know when it becomes visible and invisible, but not in the sense of the isVisible() function -- I want to know when it is actually visible or invisible. I tried adding a component listener, but that doesn't really solve the problem unless I add component listeners to the entire component hierarchy, which seems like it could result in some memory leaks unless I know when to remove the listeners. Plus it just feels like there's a better solution than recursively adding listeners and calling isVisible() recursively up the tree every time an event fires. I must be missing something obvious.
Any help appreciated.Tthanks,
bjorn

Did you find an answer for this ... ??? I did some test and ....
        myPanel.addPropertyChangeListener("ancestor", new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent evt) {
                if (evt.getNewValue() == null) {
                    //when ancestor is not available,,, means this component will be invisible.seems to be the best so far... but I think there should be a better way to do this..

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Monitoring visibility on screen of component

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