Reimplementing mouseMoveEvent function in QGraphicsProxyWidget does not work.

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Hello,
I am doing a program which allow to put, move and resize QWidget (QSlider, QPushButton, QDial...) inside a workspace. This workspace is a QGraphicView. I use a QGraphicsProxyWidget with a QGraphicsRectItem as parent to be able to move it easily and I give my widget to ProxyWidget which is inherited from QGraphicsProxyWidget.
Then, to resize my widget, I try to reimplement the functions mousePressEvent() (which works well) and mouseMoveEvent() but it does not work.

I tried to do setMouseTracking(true) on my widget, but nothing.

Here my code:

QGraphicsRectItem* rectItem = new QGraphicsRectItem();
rectItem->setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
scene->addItem(rectItem);
 
QDial *label = new QDial();
label->setMouseTracking(true);
ProxyWidget *proxyWidget = new ProxyWidget(rectItem);
proxyWidget->setWidget(label);

QGraphicsRectItem* rectItem = new QGraphicsRectItem();
rectItem->setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
scene->addItem(rectItem);

QDial *label = new QDial();
label->setMouseTracking(true);
ProxyWidget *proxyWidget = new ProxyWidget(rectItem);
proxyWidget->setWidget(label);

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void ProxyWidget::mousePressEvent(QGraphicsSceneMouseEvent *e)
{
    if (this->isMovable)
        e->ignore();            //[1]
    else
        e->accept();
}

void ProxyWidget::mousePressEvent(QGraphicsSceneMouseEvent *e)
{
    if (this->isMovable)
        e->ignore();            //[1]
    else
        e->accept();
}

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In ProxyWidget I have just reimplemented mousePressEvent() and mouseMoveEvent().

Any idea?

EDIT: If I change e->ignore() by e->accept() mouseMoveEvent() works. But I cannot move my widget anymore because my widget get the focus, for exemple for a QPushButton, the button is pushed.