Audacious

The Qt5 documentation says it's possible under the X11 platform. On other platforms these events will not be generated, so #ifdef's are not required.

I tried to hack a solution via

void StatusIcon::wheelEvent(QWheelEvent *event)
{
    if (event->delta() >= 0)
        aud_drct_pl_next ();
    else
        aud_drct_pl_prev ();

    event->accept();
}

but it obviously won't work since StatusIcon doesn't inherit QWidget.

Probably that could be done via installEventFilter() but my C++ knowledge is nul.