[vtkusers] setSlice problem on QVTKWidget

[Massi]

Hi,
I'm using the latest version of VTK 5.10 on Win7 and I'm trying to read some
DICOM images and opening them in QVTKWidget on Qt. The problem occurs when I
try to display each slice from the series. It immediately crush when I press
UP or Down on the keyboard (see the picture). After several hours of
debugging, the problem comes from vtkImageViewer2 when I set the number of
slice. 

ImageViewer->setSlice(Slice);

Can Anyone help? I really don't know what I'm missing here!
here is my code

************************.h file*****************************
class myVtkInteractorStyleImage : public vtkInteractorStyleImage{
public:
    Ui::ImageCoregistration widget;
public:
    static myVtkInteractorStyleImage *New();
    vtkTypeMacro(myVtkInteractorStyleImage,vtkInteractorStyleImage);
protected:
    vtkImageViewer2* ImageViewer;
    int Slice;
    int MinSlice;
    int MaxSlice;
public:
    void SetImageViewer(vtkImageViewer2* imageViewer){
        ImageViewer = imageViewer;
        MinSlice = imageViewer->GetSliceMin();
        MaxSlice = imageViewer->GetSliceMax();
        Slice = MinSlice;
        cout<< "Slicer: Min =" << MinSlice <<", Max =
"<<MaxSlice&lt;&lt;std::endl;
    }
    
protected:
    void MoveSliceForward(){
        if (Slice &lt; MaxSlice){
            Slice += 1;
            ImageViewer->SetSlice(Slice);
            ImageViewer->Render();
        }
    }
    void MoveSliceBackward(){
        if (Slice > MinSlice){
            Slice -= 1; 
            ImageViewer->SetSlice(Slice);
            ImageViewer->Render();
        }
    }
    virtual void OnKeyDown(){
        std::string key=this->GetInteractor()->GetKeySym();
        if (key.compare("Up") == 0){
            MoveSliceForward();
        }
        else if(key.compare("Down") == 0){
            MoveSliceBackward();
        }
        vtkInteractorStyleImage::OnKeyDown();
    }
    virtual void OnMousewheelForward(){
        MoveSliceForward();
    }
    virtual void OnMouseWheelBackrward(){
        if (Slice > MinSlice){
          MoveSliceBackward();  
        }
    }    
};

************************CPP file****************************
vtkSmartPointer<vtkDICOMImageReader> reader =
vtkSmartPointer<vtkDICOMImageReader>::New();
reader->SetDirectoryName(filename);
reader->Update();

vtkSmartPointer<vtkImageViewer2> imageViewer =
vtkSmartPointer<vtkImageViewer2>::New();
imageViewer->SetInputConnection(reader->GetOutputPort());

vtkSmartPointer<myVtkInteractorStyleImage> myInteractorStyle =
vtkSmartPointer<myVtkInteractorStyleImage>::New();
    
myInteractorStyle->SetImageViewer(imageViewer);

widget.qvtkWidget->SetRenderWindow(imageViewer->GetRenderWindow());
imageViewer->SetupInteractor(widget.qvtkWidget->GetRenderWindow()->GetInteractor());
widget.qvtkWidget->GetRenderWindow()->GetInteractor()->SetInteractorStyle(myInteractorStyle);
widget.qvtkWidget->update();


Thanks for your help!

Massi

http://vtk.1045678.n5.nabble.com/file/n5715880/Untitled.png 




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