[vtkusers] Again python debugging

[Willi Huber]

Hello all,

I am trying to do some new stuff and I am again hitting the debugging barriers of vtk in python.

My code:

        file = "test.mhd"

        reader = vtk.vtkMetaImageReader()
        reader.SetFileName(file)
        reader.Update()  #just for checking because I had an observer attached to reader
        

        iren = QVTKRenderWindowInteractor(self.widget)
        ren = vtk.vtkRenderer()

        iren.GetRenderWindow().AddRenderer(ren)

                      

        viewer = vtk.vtkResliceImageViewer()
        viewer.SetRenderWindow(iren.GetRenderWindow())

        viewer.SetRenderer(ren)
        viewer.SetupInteractor(iren)
        viewer.SetInput(reader.GetOutput())
        
        viewer.SetSlice(50)
        viewer.SetColorWindow(2000.0)
        viewer.SetColorLevel(1000.0)
        
        layout = QtGui.QVBoxLayout()

        layout.addWidget(iren)
        
        self.slider = QtGui.QSlider(Qt.Horizontal, self.widget)
        layout.addWidget(self.slider)
        
        self.widget.setLayout(layout)
        
        iren.Initialize()
        iren.Start()

I can see the image in the first place.
When I use the right mouse button everything is fine and I can zoom in and out but when using the left mouse button the app suddenly freezes and the debugging window of Win7 appears - not the VTK window. It is sth. with a malloc at least this is what the debugger told me or rather stepped in.
I tried using the Error Observer suggested by David and mined every object I've access to. I also used the vtk.vtkFileOutputWindow() without any success. No file was written.
(The slider isn't currently attached to any object so you can ignore it.) Am I doing sth. wrong with the initialization?

Can someone help me with this?

Cheers,
Willi
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