QtDesigner plugin using deprecated QVTKWidget and not QVTKOpenGLNativeWidget
The QtDesigner plugin is using the deprecated QVTKWidget and not the new QVTKOpenGLNativeWidget. I made some tests and only changing the file GUISupport/Qt/Q4VTKWidgetPlugin.cxx to the new names works, but maybe creating a new pluging for the OpenGL widget is a better way. If needed I can provide the changes made here.
Thanks in advance!