Thanks Jean-Sébastien, You can't reuse (osgGA::GUIEventAdapter::DRAG) case in handle() because the scroll event needs to be cleared.
I like the idea of reusing the drag and 'dy' - I have rewritten it with that approach. It does lead to having to declare a couple of variables before they can be set which seems to be against OSG house style (and is generally a bad idea) I can only test on windows, but so long as the other windows toolkits add mouse wheel events to the GUIEventAdapter it should just work. ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=7534#7534
TrackballManipulator.cpp
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