bool ViewProviderCurveNet::handleEvent(const SoEvent * const ev, Gui::View3DInventorViewer &Viewer)
{
    SbVec3f point, norm;

    // get the position of the mouse
    const SbVec2s pos(ev->getPosition());

    // Keybooard events
    if (ev->getTypeId().isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
        SoKeyboardEvent * ke = (SoKeyboardEvent *)ev;
        switch (ke->getKey()) {
            case SoKeyboardEvent::LEFT_ALT:
            case SoKeyboardEvent::RIGHT_ALT:
            case SoKeyboardEvent::LEFT_CONTROL:
            case SoKeyboardEvent::RIGHT_CONTROL:
            case SoKeyboardEvent::LEFT_SHIFT:
            case SoKeyboardEvent::RIGHT_SHIFT:
                break;
            default:
                break;
        }
    }

    // switching the mouse buttons
    if (ev->getTypeId().isDerivedFrom(SoMouseButtonEvent::getClassTypeId())) {
        const SoMouseButtonEvent * const event = (const SoMouseButtonEvent *) ev;
        const int button = event->getButton();
        const SbBool press = event->getState() == SoButtonEvent::DOWN ? true : false;

        // which button pressed?
        switch (button) {
            case SoMouseButtonEvent::BUTTON1:
                if (press) {
                    Base::Console().Log("ViewProviderCurveNet::handleEvent() press left\n");

                    bool bIsNode =  false;
                    for (std::list<Node>::iterator It = NodeList.begin();It != NodeList.end(); It++)
                    {
                        if (It->pcHighlight->isHighlighted())
                        {
                            bIsNode = true;
                            PointToMove = *It;
                            break;
                        }
                    }

                    if (bIsNode)
                    {
                        // set the provider in point move mode and remember the point
                        bMovePointMode = true;
                        // PointToMove = *It; ### Error 'It' is out of scope->move inside the loop

                        return true;
                    }
                    else if(Viewer.pickPoint(pos,point,norm))
                    {
                        Node n;
                        Base::Console().Log("Picked(%f,%f,%f)\n",point[0],point[1],point[2]);

                        SoSeparator *TransRoot = new SoSeparator();
                        n.pcTransform          = new SoTransform();
                        TransRoot->addChild(n.pcTransform);
                        n.pcTransform->translation.setValue(point);
                        n.pcHighlight          = new Gui::SoFCSelection();
                        SoSphere * sphere      = new SoSphere;
                        sphere->radius = (float)pcLineStyle->pointSize.getValue();
                        n.pcHighlight->addChild(sphere);
                        TransRoot->addChild(n.pcHighlight);
                        VertexRoot->addChild(TransRoot);

                        NodeList.push_back(n);
      
                        return true;
                    }
                }
                else // if(pressd)..
                {
                    if (bMovePointMode)
                    {
                        bMovePointMode = false;
                        return true;
                    }
                }
            break;
        }
    }

    // Mouse Movement handling
    if (ev->getTypeId().isDerivedFrom(SoLocation2Event::getClassTypeId())) {
        //    const SoLocation2Event * const event = (const SoLocation2Event *) ev;

        if (bMovePointMode && Viewer.pickPoint(pos,point,norm) ){
            PointToMove.pcTransform->translation.setValue(point);     
            return true;
        }
    }

    // event not processed
    return false;
}