setparent/setparentitem for window

[caren22]

Hi,

I have a window, then I create a new window and want to show it within the first window(with showing title window/minimize window, and it should be movable only within the first window). But set parent does not work.

QQmlApplicationEngine engine;    
    QQmlComponent component(&engine, QUrl("qrc:/main.qml"));
 
    QObject *m_visual = component.create();
    QQuickWindow *window = (QQuickWindow *)m_visual;
 
 
 
    QQmlApplicationEngine engine_sub;
    QQmlComponent component_sub(&engine_sub, QUrl("qrc:/window2.qml"));
 
    QObject *m_visual_sub = component_sub.create();
 
 
 
    QQuickWindow *window_sub = (QQuickWindow *)m_visual_sub;
    m_visual_sub->setParent(m_visual);
    ((QQuickItem *)m_visual_sub)->setParentItem(window->contentItem());

QQmlApplicationEngine engine;    
    QQmlComponent component(&engine, QUrl("qrc:/main.qml"));

    QObject *m_visual = component.create();
    QQuickWindow *window = (QQuickWindow *)m_visual;



    QQmlApplicationEngine engine_sub;
    QQmlComponent component_sub(&engine_sub, QUrl("qrc:/window2.qml"));

    QObject *m_visual_sub = component_sub.create();



    QQuickWindow *window_sub = (QQuickWindow *)m_visual_sub;
    m_visual_sub->setParent(m_visual);
    ((QQuickItem *)m_visual_sub)->setParentItem(window->contentItem());

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Thank you so much!

any update
got stuck in the same place