[Insight-users] Display image with ITK+VTK in VC dialog

[x0_y0_0]

hi,users,
 I wanted to use ITK read PNG image and segement it,then through VTK and show on the VC's dialog.my program can through complie but can't show the result.Next It is my code .Does anybody could give me some help? thanks .
                                                          sincerely mexiao
class CVTK  
{
public:
 vtkWin32RenderWindowInteractor *iren;
 vtkImageViewer  *viewer;
 typedef itk::Image< float, 2 >  InternalImageType1;
 
  typedef itk::Image< unsigned char, 2 > OutputImageType1;
    typedef  itk::ImageFileReader< InternalImageType1 > ReaderType1;
  typedef  itk::ImageFileWriter<  OutputImageType1  > WriterType1;
 typedef itk::CastImageFilter< InternalImageType1, OutputImageType1 > CastingFilterType;
  typedef itk::CurvatureFlowImageFilter< InternalImageType1, InternalImageType1 > CurvatureFlowImageFilterType;
  typedef itk::ConnectedThresholdImageFilter< InternalImageType1, InternalImageType1> ConnectedFilterType;
   float lowerThreshold ;
   float upperThreshold ;
  InternalImageType1::IndexType  index;
   typedef itk::Image< unsigned char, 2 > ImageType;
  typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
public:
 vtkCellPicker * picker;
 static void MyExecute(vtkObject *caller, unsigned long eid, void *clientdata, void *calldata);
 void BeginRenderOn(CStatic* aStatic);
 CVTK();
 virtual ~CVTK();
};
//////////////////////////////////////////////////////////////////////////////////////////
CVTK::CVTK()
{ 
    lowerThreshold = 150.0;
    upperThreshold = 180.0;
   index[0] =60;
  index[1] =116;
  ReaderType1::Pointer reader = ReaderType1::New();
  reader->SetFileName("G:\\ITKVTK\\test\\test\\myProject\\Debug\\BrainProtonDensitySlice.png");
  WriterType1::Pointer writer = WriterType1::New();
  writer->SetFileName("G:\\ITKVTK\\test\\test\\myProject\\Debug\\aa.png");
  CurvatureFlowImageFilterType::Pointer smoothing = CurvatureFlowImageFilterType::New();
  ConnectedFilterType::Pointer connectedThreshold = ConnectedFilterType::New();
     CastingFilterType::Pointer caster = CastingFilterType::New();
  smoothing->SetInput( reader->GetOutput() );
  connectedThreshold->SetInput( smoothing->GetOutput() );
  caster->SetInput( connectedThreshold->GetOutput() );
  writer->SetInput( caster->GetOutput() );

  smoothing->SetNumberOfIterations( 5 );
  smoothing->SetTimeStep( 0.125 );
  connectedThreshold->SetLower(  lowerThreshold  );
  connectedThreshold->SetUpper(  upperThreshold  );
  connectedThreshold->SetReplaceValue( 255 );
  connectedThreshold->SetSeed( index );
   ConnectorType::Pointer connector = ConnectorType::New();
  connector->SetInput( caster->GetOutput()); 
  
// writer->Update();

  viewer = vtkImageViewer::New();
   viewer->SetInput(connector->GetOutput());
   viewer->SetColorWindow(256);
   viewer->SetColorLevel(128);

iren = vtkWin32RenderWindowInteractor::New();
      viewer->SetupInteractor(iren);
  //   connector->Update();
picker=vtkCellPicker::New();
    //picker->SetTolerance(0.00001);

vtkCallbackCommand * cmd = vtkCallbackCommand::New();
cmd->SetCallback(CVTK::MyExecute);
cmd->SetClientData( this );
picker->AddObserver(vtkCommand::EndPickEvent, cmd);
iren->SetPicker(picker);
cmd->Delete(); 

}
/////////////////////////////////////////////////////
BOOL CDlgVTKITKDlg::OnInitDialog()
{
 CDialog::OnInitDialog();
 SetIcon(m_hIcon, TRUE);   // Set big icon
 SetIcon(m_hIcon, FALSE);  // Set small icon
 // TODO: Add extra initialization here
 this->m_vtk.BeginRenderOn(&(this->m_RenderArea));//have been defined CVTK m_vtk;
    UpdateData(FALSE);
 
 return TRUE;  // return TRUE  unless you set the focus to a control
}
///////////////////////////////////////////////////////////////////////
void CVTK::BeginRenderOn(CStatic * aStatic)
{
CRect rect;
aStatic->GetClientRect(&rect);
viewer->SetSize(rect.Width(),rect.Height());
viewer->SetParentId(aStatic->m_hWnd);   
viewer->Render();                             
// iren->Initialize();
}
/////////////////////////////////////////////////////////////////
void CVTK::MyExecute(vtkObject *caller, unsigned long eid, void *clientdata, void *calldata)
{
CVTK *m_viewer = reinterpret_cast<CVTK*>(clientdata );
    if (m_viewer->picker->GetCellId()<0)
{
  AfxMessageBox("CellID < 0");
}
    else
{
  AfxMessageBox("CellID > 0");
  double ScreenCoordinate[3],globalCoordinate[3]; 
  m_viewer->picker->GetSelectionPoint(ScreenCoordinate); 
  m_viewer->picker->GetPickPosition(globalCoordinate); 
};
}
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