problem with combine Qt 5.4 QOpenGLContext to native opengl context

[wysota]

As I know, Qt could render GUI widgets in GraphicView.

GraphicsView is a widget. And the "widgets" it renders are not really widgets.

It seems that Qt could render widgets in GL context.

It probably could (at least since 5.4) but I don't think that would be a good approach.

Can you show me some code sample of this?

No

Or the FBO solution could fit my need, I also need some code sample, because I have no idea how to begin with.

Use the docs Luke -- QOpenGLFramebufferObject.