如何强制QWidget显示在单独的窗口中？

class MyWidget : public QWidget
{
    Q_OBJECT
public:
    explicit MyWidget (QWidget *parent);
    // ...
};

// here is ALL the code in MyWidget constructor
MyWidget::MyWidget(QWidget *parent)
    : QWidget(parent)
{
    glWidget = new GLWidget(this, cluster);

    QHBoxLayout *mainLayout = new QHBoxLayout;
    mainLayout->addWidget(glWidget);
    setLayout(mainLayout);

    setWindowTitle("Visualization");
}

MainWindow w;

w

QCloseEvent

w

QCloseEvent

MyWidget

void MainWindow::visualize()
{
    MyWidget *widg = new MyWidget(this); // or widg = new MyWidget(0)
    widg->show();
    widg->raise();
    widg->activateWindow();
}

w

parent

widg

widg

w