How to create a OpenGL widget in Qt and VIsual Studio?

Question

I'm trying to create a OpenGL widget using Qt 6.4 and VStudio 2022, i have enable the Qt OpenGL widget under the modules, but i still getting a lot of compile errors:

LNK2019 unresolved external symbol "__declspec(dllimport) public: __cdecl QOpenGLWidget::QOpenGLWidget(class QWidget *,class QFlags<enum Qt::WindowType>)" (__imp_??0QOpenGLWidget@@QEAA@PEAVQWidget@@V?$QFlags@W4WindowType@Qt@@@@@Z) referenced in function "public: void __cdecl Ui_MainWindowClass::setupUi(class QMainWindow *)" (?setupUi@Ui_MainWindowClass@@QEAAXPEAVQMainWindow@@@Z)

I'm testing in a 'clean' project containing nothing more than a OpenGlWidget added trough QT Designer.

The includes i have added:

#include <QtWidgets>
#include <QtOpenGL>

My project configuration:

I have also tried adding, into Linker -> General -> Additional Library directories:

D:\Qt\6.4.0\msvc2019_64\lib;

And at Linker -> Input -> Additional Dependencies:

Qt6OpenGL.lib

But i continue getting the same errors.

I have installed everything in the Qt Maintenance tool, what i'm missing?

Answer 1

QOpenGLWidget has been moved to Qt OpenGL Widgets module. You must to link against both Qt6OpenGL.lib and Qt6OpenGLWidget.lib.

https://doc.qt.io/qt-6/opengl-changes-qt6.html#the-qopenglwidgets-class

Answer 2

Which help from Qt Forum, I found that these errors were being caused because I was missing adding the openglwidgets module into the project.

After setting Qt Modules to core;gui;widgets;opengl;openglwidgets it compiled successfully.

It strange that the module openglwidgets is missing in the plugin window of Qt Modules, should be reported as a bug/missing?