QOpenGLWidget inside a QDockWidget not updated when QDockWidget::setFloating(true)

[neosettler]

I accidently found a solution,

It looks like adding the code snippet below anywhere in my code fixes the problem:

#include <QWebEngineView>
 
class QT_WebView : public QWebEngineView
{
	Q_OBJECT
public:
	QT_WebView(QWidget *in_parent = NULL) : QWebEngineView(in_parent) {}
};

#include <QWebEngineView>

class QT_WebView : public QWebEngineView
{
	Q_OBJECT
public:
	QT_WebView(QWidget *in_parent = NULL) : QWebEngineView(in_parent) {}
};

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No need to mentioned that this is as hocus pocus as it gets and the hack is quite a huge dependency to add in a project. I'm still digging and hopping to find an more elegant fix.

It seems the bug has to do with OpenGL context sharing and I try quite a few combinations without any good outcome so far.

[d_stranz]

Oh, man, this is complete voodoo. You don't even need an instance of the class, you just need to define it? What if you don't define the class, but just declare an instance of QWebEngineView in main() but never show() it? Or simply include the QWebEngineView header file in main()?

[neosettler]

This is good voodoo stuff indeed!

You don't even need an instance of the class, you just need to define it?

That is correct.

What if you don't define the class, but just declare an instance of QWebEngineView in main() but never show() it?

Declaring an instance of QWebEngineView to the main() do work:

QWebEngineView l_QWebEngineView;

Or simply include the QWebEngineView header file in main()?

Good call but nope.