void CRotationSlider::OnSliderMoved( int position )
{
    C_BaseObject *pObj = m_hObject.Get();
    if (pObj && pObj->IsPreviewingYaw())
    {
        m_flYaw = anglemod(position);
        pObj->PreviewYaw( m_flInitialYaw - m_flYaw );
    }
}
//-----------------------------------------------------------------------------
// When the slider is activated, deactivated, or moves
//-----------------------------------------------------------------------------
void CRotationSlider::OnMousePressed( vgui::MouseCode code )
{
    BaseClass::OnMousePressed( code );

    if (code != vgui::MOUSE_LEFT)
        return;

    C_BaseObject *pObj = m_hObject.Get();
    if (pObj)
    {
        m_flInitialYaw = pObj->GetAbsAngles().y;
        pObj->PreviewYaw( m_flInitialYaw );
        pObj->ActivateYawPreview( true );
    }
}