Custom items selection in qgraphicsscene

[yonnak]

Hello,
I'm trying to modify default selection behaviour in qgraphicsscene. I'd like to have an event propagation: if a mouse clic occurs on the topmost item, it should be sent to every item under the topmost one.

I try different solutions but can't get it work. Here is my last try in a class derived from QGraphicsScene:

bool myScene::event(QEvent *event)
{
    if ( event->type() == QEvent::GraphicsSceneMousePress ) {
        QGraphicsSceneMouseEvent * me  = (QGraphicsSceneMouseEvent *) event;
        me->setModifiers(Qt::ControlModifier);
        for ( int i = 0; i < items(me->scenePos()).count(); i++ ){
            items(me->scenePos()).at(i)->setFocus(Qt::MouseFocusReason);
            mousePressEvent(me);
        }
        return false;
    }
    QGraphicsScene::event(event);
    return true;
}

bool myScene::event(QEvent *event)
{
    if ( event->type() == QEvent::GraphicsSceneMousePress ) {
        QGraphicsSceneMouseEvent * me  = (QGraphicsSceneMouseEvent *) event;
        me->setModifiers(Qt::ControlModifier);
        for ( int i = 0; i < items(me->scenePos()).count(); i++ ){
            items(me->scenePos()).at(i)->setFocus(Qt::MouseFocusReason);
            mousePressEvent(me);
        }
        return false;
    }
    QGraphicsScene::event(event);
    return true;
}

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Thanks for any help