Detecting when PopupApplet is iconified

[Rob Hasselbaum]

Hi all. How can I tell if a PopupApplet is iconified and therefore not
displaying its content? I was hoping I could override popupEvent and/or
check isPopupShowing, but that approach doesn't work if the applet was added
to the desktop instead of a panel. I'm guessing I should look at the
applet's containment, but what property or properties should I check?

Thanks!
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