如何将鼠标事件从QMenuBar传播到父QMainWindow？

Question

我正在尝试实现无框窗口。我在窗口类中编写了一些函数来处理拖放鼠标事件。但是，当我拖动菜单时，我的窗口类没有收到鼠标事件。如何将鼠标事件传播到窗口类？

.h文件：

class MyWindow : public QMainWindow
{
    Q_OBJECT

public:
    MyWindow(QWidget *parent = 0);
    ~MyWindow();

private:
    Ui::DeblurSoftwareWinClass ui;

protected:
    void mouseMoveEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);
    void mousePressEvent(QMouseEvent *e);
    QPoint window_drag_start_pos;
};

.cpp文件：

MyWindow::MyWindow(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);
}

MyWindow::~MyWindow()
{}

void MyWindow::mousePressEvent(QMouseEvent *e) {
    if (!isMaximized() &&
        e->button() == Qt::LeftButton) {
        window_drag_start_pos = e->pos();
    }
}

void MyWindow::mouseReleaseEvent(QMouseEvent *e) {
    window_drag_start_pos = QPoint(0, 0);
}

void MyWindow::mouseMoveEvent(QMouseEvent *e) {
    if (!window_drag_start_pos.isNull()) {
        move(pos() + e->pos() - window_drag_start_pos);
    }
}

创建项目时默认创建QMenuBar对象。