Quote Originally Posted by rickbsgu
Barring that, you'll have to get to the screen pixel buffer. I'm not sure if you can do that in Qt. You might have to go down to raw windows to get to it.
One can always capture the widget using QPixmap::grabWidget(), but IMO it's better to just know where clock's hands are instead of checking pixel's colour. QPainterPath::contains() might be usefull.