如何通过拖放的方式在鼠标下获取QLayout中的widget？

class DragLabel : public QLabel
{
public:
    DragLabel(const QString& text, QWidget* parent = nullptr) : QLabel(text, parent)
    {
        setAlignment(Qt::AlignCenter);
        setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
        setStyleSheet("QLabel { background-color: lightblue; border: 1px solid darkblue; }");
    }

    void mousePressEvent(QMouseEvent* event) override
    {
        if (event->button() == Qt::LeftButton)
            QDrag::startDrag(this, Qt::CopyAction);
    }
};

QVBoxLayout* layout = new QVBoxLayout;
QWidget* container = new QWidget;
container->setLayout(layout);

DragLabel* label1 = new DragLabel("Widget 1");
DragLabel* label2 = new DragLabel("Widget 2");
DragLabel* label3 = new DragLabel("Widget 3");

layout->addWidget(label1);
layout->addWidget(label2);
layout->addWidget(label3);

container->setAcceptDrops(true);

void dragEnterEvent(QDragEnterEvent* event) override
{
    if (event->mimeData()->hasFormat("text/plain"))
        event->acceptProposedAction();
}

void dragMoveEvent(QDragMoveEvent* event) override
{
    event->acceptProposedAction();
}

void dropEvent(QDropEvent* event) override
{
    if (event->mimeData()->hasFormat("text/plain"))
    {
        QString text = event->mimeData()->text();
        DragLabel* newLabel = new DragLabel(text);
        layout->addWidget(newLabel);
        event->acceptProposedAction();
    }
}