Window does not work with QVTKWidget

It does not work as call setcentralwidget with QVTKWidget in Widget.cpp
My code is simple.
QVTKWidget * vtkw;

vtkw = new QVTKWidget;

this->setCentralWidget(vtkw);

I can not move dialog and resize, but toolbar button work well

Thank you in advance for your help.

#QVTKWidget is visualization tool kit libray for QT

I have the same problem with a QGraphicsView with OpenGL.

I Have a QGraphicsView in the mainWindow.

then I set :
ui.graphicsView->setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));

then all mouse event seem's to be ignore.

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