[osg-users] osgQt::GLWidget Scroll Bug

[OpenSceneGraph Users]

I think I'm running into a bug in OSG.  I've implemented my own versions of 
mouse events in a sub-classed osgQt::GLWidget so I can redraw the 3D view 
only when necessary:

void Osg3dViewCM::mousePressEvent(QMouseEvent* event)
{
    m_mouseDown = true;

    if (_cameraManipulator.valid())
    {
        osgQt::GLWidget::mousePressEvent(event);

        frame();
    }
}

void Osg3dViewCM::mouseReleaseEvent(QMouseEvent* event)
{
    m_mouseDown = false;

    if (_cameraManipulator.valid())
    {
        osgQt::GLWidget::mouseReleaseEvent(event);

        frame();
    }

    emit cameraChanged(_cameraManipulator->getInverseMatrix());
}

void Osg3dViewCM::mouseMoveEvent(QMouseEvent* event)
{
    if (_cameraManipulator.valid() && m_mouseDown)
    {
        osgQt::GLWidget::mouseMoveEvent(event);

        frame();
    }
}

void Osg3dViewCM::wheelEvent(QWheelEvent *event)
{
    if (_cameraManipulator.valid())
    {
        osgQt::GLWidget::wheelEvent(event);

        frame();
    }
}

I'm using a default osgEarth::Util::EarthManipulator and clicking and 
dragging on the view updates it without an issue rotating or panning 
properly.  For some reason, when I scroll the wheel, the frame function 
doesn't update the view.  If I click on the view after scrolling, it gets 
updated with the zoom operation applied.  Am I missing something?

Thank you,
Scott

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