[vtkusers] How to put Qt widgets on top of a VTK OpenGL scene

[Elvis Dowson]

Hi,
         Could you please help me narrow down, as to why using  
QGraphicsView with QWidget doesn't work? I just thought I'd try  
QVTKWidget in its original form and try to get to render the VTK scene  
alone in QVTKWidget that is held by a QGraphicsView.

This gives the identical blank white screen, as when I tried to use  
QVTKWidget inherited from QGLWidget. So, I need to first fix the case  
where a normal QVTKWidget inherited from QWidget will work.

I just need to host the original QVTKWidget within QGraphicsView,  
that's it. How can I do this?

The following code gives me a blank white screen. What am I doing wrong?

Best regards,

Elvis

int main(int argc, char** argv)
{

	QApplication app(argc, argv);
	
	// Declare variables
	vtkCylinderSource* source	= NULL;
	vtkPolyDataMapper* mapper	= NULL;
	vtkActor* actor				= NULL;
	vtkRenderer* ren			= NULL;
	
	// Add support for rendering Qt widgets in an OpenGL scene	
     	GraphicsView view;	
	QVTKWidget* qvtkWidget = new QVTKWidget(&view);

	// Turn off double buffering in the VTK render window
     	qvtkWidget->GetRenderWindow()->DoubleBufferOff();
	
	// Associate the QVTKWidget with the QGraphicsView
     	view.setViewport(qvtkWidget);
     	view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate);

	// Qt vtk integration
	ren = vtkRenderer::New();
	qvtkWidget->GetRenderWindow()->AddRenderer(ren);
	
	// Geometry
	source = vtkCylinderSource::New();
	
	// Mapper
	mapper = vtkPolyDataMapper::New();
	mapper->ImmediateModeRenderingOn();
	mapper->SetInputConnection(source->GetOutputPort());
	
	// Actor in scene
	actor = vtkActor::New();
	actor->SetMapper(mapper);
	
	// Add Actor to renderer
	ren->AddActor(actor);
	
	// Reset camera and render scene
	ren->ResetCamera();
	ren->GetRenderWindow()->Render();

     	view.show();

   	return app.exec();
}

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20081017/11cabefa/attachment.htm>