QOpenGLWidget black screen as a newly created class

[ElonWu]

I got a black screen when creating a QOpenGLWidget from a QWidget in 5.14, and the code like this:
widget.cpp:

    QOpenGLWidget *game = new QOpenGLWidget();
    game->show();

But that openglwidget is really rendered and running normally if it's an independent application.

This happened when i integrate it into another application by directly copy all files.

I know QOpenGLWidget's function may fail when used as child thread, so should i integrate it into subdir project and launch it from other project or is there any other method to make it render again?

[ElonWu]

It's been solved by create a process and launch the QOpenGLWidget's .exe file.