如何在QGraphicsItem派生类中接收鼠标事件？Qt

class MyGraphicsItem : public QGraphicsItem
{
public:
    MyGraphicsItem()
    {
        setFlag(ItemIsMovable); // 设置图形项可移动
    }

    QRectF boundingRect() const override
    {
        return QRectF(-50, -50, 100, 100); // 定义图形项的边界矩形
    }

    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override
    {
        painter->drawRect(boundingRect()); // 绘制图形项
    }

    void mousePressEvent(QGraphicsSceneMouseEvent *event) override
    {
        // 鼠标按下事件处理
        qDebug() << "Mouse Pressed";
        QGraphicsItem::mousePressEvent(event);
    }

    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override
    {
        // 鼠标移动事件处理
        qDebug() << "Mouse Moved";
        QGraphicsItem::mouseMoveEvent(event);
    }

    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override
    {
        // 鼠标释放事件处理
        qDebug() << "Mouse Released";
        QGraphicsItem::mouseReleaseEvent(event);
    }
};