[vtkusers] QVTKInteractor Can not control event loop

[agatte]

Hello !


I am trying to add contourwidget (pointplacer)  to qvtkWidget.
I received an error concering *QVTKInteractor cannot control the event
loop.*

I don't know what is wrong in my code.
I followed examples from VTK wiki (PolygonalSurfacePointPlacer, vtk+qt).

 // 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);
 
  // Create the RenderWindow, Renderer
  vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor(actor);

  vtkSmartPointer<vtkRenderWindowInteractor> interactor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
  interactor = ui->qvtkWidget->GetInteractor();
 
  vtkSmartPointer<vtkContourWidget> contourWidget = 
vtkSmartPointer<vtkContourWidget>::New();
  contourWidget->SetInteractor(interactor);
 
  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);

  vtkSmartPointer<vtkRenderWindow> renwin =
vtkSmartPointer<vtkRenderWindow>::New();
  renwin->AddRenderer(renderer);
  ui->qvtkWidget->SetRenderWindow(renwin);

 // renwin->SetInteractor(ui->qvtkWidget->GetInteractor());
  //ui->qvtkWidget->GetInteractor()->SetRenderWindow(renwin);
  interactor->SetRenderWindow(renwin);
  contourWidget->EnabledOn();
  renderer->ResetCamera();
  renwin->SetInteractor(interactor);
 // ui->qvtkWidget->GetRenderWindow()->Render();
 // ui->qvtkWidget->GetInteractor()->Initialize();
 // ui->qvtkWidget->GetInteractor()->Start();
  renwin->Render();
  interactor->Initialize();
  interactor->Start();


}

I would appreciate for any help please.

agatte
 



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