[vtkusers] Question ? ContourWidget Qt+VTK

[agatte]

Hi,

I am trying to make contour Widget. 
I followed  PolygonalSurfacePointPlacer  and RenderWindowUISingleInheritance
example from VTK wiki :
http://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/vtkPolygonalSurfacePointPlacer
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Qt/RenderWindowUISingleInheritance

I can not clicked on sphere. It doesn't work.
I have a problem with interactor and qvtkwidget.

Could You look at my code  ?

I received an error concerning  :
ERROR: In ..\..\..\GUISupport\Qt\QVTKInteractor.cxx, line 147
QVTKInteractor (0B18A530): QVTKInteractor cannot control the event loop.

// Constructor
RenderWindowUISingleInheritance::RenderWindowUISingleInheritance() 
{
  this->ui = new Ui_RenderWindowUISingleInheritance;
  this->ui->setupUi(this);
 
  vtkSmartPointer<vtkSphereSource> sphereSource =
vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->SetRadius(5);
  sphereSource->Update();
 
  vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(sphereSource->GetOutputPort());
 
  vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
 
  vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor(actor);
 
  vtkSmartPointer<vtkContourWidget> contourWidget = 
vtkSmartPointer<vtkContourWidget>::New();
  contourWidget->SetInteractor(this->ui->qvtkWidget->GetInteractor());
 
  vtkSmartPointer<MyCallback> callback = vtkSmartPointer<MyCallback>::New();
  callback->SetSphereSource(sphereSource);
  contourWidget->AddObserver(vtkCommand::InteractionEvent,callback);
 
  vtkOrientedGlyphContourRepresentation* rep =
vtkOrientedGlyphContourRepresentation::SafeDownCast(
  contourWidget->GetRepresentation());
 
  vtkSmartPointer<vtkPolygonalSurfacePointPlacer> pointPlacer =
vtkSmartPointer<vtkPolygonalSurfacePointPlacer>::New();
  pointPlacer->AddProp(actor);
  pointPlacer->GetPolys()->AddItem(sphereSource->GetOutput());
 
  rep->GetLinesProperty()->SetColor(1, 0, 0);
  rep->GetLinesProperty()->SetLineWidth(3.0);
  rep->SetPointPlacer(pointPlacer);

  this->ui->qvtkWidget->GetRenderWindow()->AddRenderer(renderer);
 
  contourWidget->EnabledOn();
  renderer->ResetCamera();
*  this->ui->qvtkWidget->GetRenderWindow()->Render(); // ??
 this->ui->qvtkWidget->GetInteractor()->Initialize(); // ??  
 this->ui->qvtkWidget->GetInteractor()->Start();  //  Here ?? *


  // Set up action signals and slots
  connect(this->ui->actionExit, SIGNAL(triggered()), this,
SLOT(slotExit()));
 
}


I would appreciate for any help please. 







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