I have a QML application and I need to integrate an OpenGL window. So I did:

GLViewport.h
@ class GLViewport : public QQuickItem{...}
@

GLViewport.cpp
@ GLViewport::GLViewport()
{
connect(this, SIGNAL(windowChanged(QQuickWindow*)), this, SLOT(HandleWindowChanged(QQuickWindow*)), Qt::DirectConnection);
setFlags(QQuickItem::ItemHasContents);
}

void GLViewport::HandleWindowChanged(QQuickWindow *win)
{
  if (win)
  {
    win->setSurfaceType(QSurface::OpenGLSurface);

    QSurfaceFormat format;
    format.setRenderableType(QSurfaceFormat::OpenGL);
    format.setSamples(4);
    format.setVersion(3, 2); // <<== this puts a mess!
    format.setProfile&#40;QSurfaceFormat::CoreProfile&#41;;
    win->setFormat(format&#41;;
    win->create(&#41;;

    QOpenGLContext *context = new QOpenGLContext;
    context->setFormat(format&#41;;
    context->create(&#41;;
    if (!context->isValid(&#41;)
    {
      std::cout << "ERROR: cannot set OpenGL context" << std::endl;
    }
    context->makeCurrent(win);

[...]

  }
}

@

However, the line setFormat(3,2) puts a real mess. Basically, if I comment it, everything works. I have a window with a OpenGL 2.0 and a "internal context" with OpenGL 4.4. Problem is, my viewport needs an OpenGL 3.2 context for drawing our things. How can I achieve that then?

Thanks for any help!

UPDATE
If fact, it does NOT work with "OpenGL under QML example":http://qt-project.org/doc/qt-5/qtquick-scenegraph-openglunderqml-example.html either. If I try to change OpenGL version, I get a black background when doing setVersion(3,2).