为qgraphicsObject实现跟随游标的mouseMoveEvent

class MyGraphicsObject : public QGraphicsObject
{
    Q_OBJECT
public:
    explicit MyGraphicsObject(QGraphicsItem* parent = nullptr);
    // 其他成员函数和变量
protected:
    void mouseMoveEvent(QGraphicsSceneMouseEvent* event) override;
};

void MyGraphicsObject::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
{
    // 获取当前鼠标位置
    QPointF cursorPos = event->scenePos();

    // 设置图形对象的位置为鼠标位置
    setPos(cursorPos);

    // 调用父类的mouseMoveEvent函数，确保其他事件处理正常
    QGraphicsObject::mouseMoveEvent(event);
}

QGraphicsScene scene;
MyGraphicsObject* myObject = new MyGraphicsObject();
scene.addItem(myObject);