Reject drop action for child QGraphicsItem

Hello,

I searched for this, but somehow I can't find anything that solves this problem (I cannot believe that I am the only person with that problem).

Nevertheless, my problem is:
I have a GraphicsScene with a Tree of the same items.
On some item I want to reject the dragNdrop actions and accept the action on other items.
I Would like that the cursor shows, that the action will be rejected but it stays the same icon if I use setDropAction(Qt::IgnoreAction).

The two function implementations look like this:

Code:

---

void StateItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
{
    const StateMimeData *data =  qobject_cast<const StateMimeData*>(event->mimeData());
    if(data && state && state->getStateClass() && data->getState())
    {
        event->setDropAction(Qt::LinkAction);
        event->acceptProposedAction();
    }
    else
    {
        event->setDropAction(Qt::IgnoreAction);
        event->acceptProposedAction();
    }
}
 
void StateItem::dragMoveEvent(QGraphicsSceneDragDropEvent *event)
{
    dragEnterEvent(event);
}
 
 
 
void StateItem::dropEvent(QGraphicsSceneDragDropEvent *event)
{
    const StateMimeData *data =  qobject_cast<const StateMimeData*>(event->mimeData());
    if(data && state && state->getStateClass() && data->getState())
    {
        int i = 2;
        const QString newStateNameBase = data->getState()->getStateName();
        QString newStateName = newStateNameBase;
        while(!state->getStateClass()->addSubstate(data->getState(),newStateName, event->pos()))
        {
            newStateName = newStateNameBase + "_" + QString::number(i);
            i++;
        }
        event->setDropAction(Qt::LinkAction);
        event->acceptProposedAction();
    }
    else
    {
        event->setDropAction(Qt::IgnoreAction);
        event->acceptProposedAction();
    }
}

---

If I use event->ignore(); it will just be passed to the parent item.

So how do I reject the action properly, that the mouse cursor shows that it will be rejected?