Как определить последовательность состояний кнопок с C ++ и VTK

Question

Я новичок в c ++, и я пытаюсь понять, как получить состояние от кнопки и, чтобы для каждого состояния происходило отдельное событие.Я определил условие if () (закомментированное в capslock), как вы можете видеть в коде, но я получаю ошибку на visual studio C3867

Ошибка C3867 'vtkButtonRepresentation :: GetState': не стандартный синтаксис;Вы должны использовать '&', чтобы создать указатель на член

static void CreateImage(vtkSmartPointer<vtkImageData> image,
                        unsigned char *color1,
                        unsigned char *color2);

int main(int, char *[])
{
  // Create two images for texture
  vtkSmartPointer<vtkImageData> image1 =
    vtkSmartPointer<vtkImageData>::New();
  vtkSmartPointer<vtkImageData> image2 =
    vtkSmartPointer<vtkImageData>::New();
  unsigned char banana[3] = { 227, 207, 87 };
  unsigned char tomato[3] = { 255, 99, 71 };
  CreateImage(image1, banana, tomato);
  CreateImage(image2, tomato, banana);

  vtkSmartPointer<vtkNamedColors> colors =
      vtkSmartPointer<vtkNamedColors>::New();

  vtkColor3d backgroundColor = colors->GetColor3d("Indigo");
  vtkColor3d actorColor = colors->GetColor3d("Tomato");
  vtkColor3d axis1Color = colors->GetColor3d("Salmon");
  vtkColor3d axis2Color = colors->GetColor3d("PaleGreen");
  vtkColor3d axis3Color = colors->GetColor3d("DodgerBlue");

  vtkSmartPointer<vtkCubeSource> cube =
      vtkSmartPointer<vtkCubeSource>::New();
  cube->SetXLength(0.50);
  cube->SetYLength(0.13);
  cube->SetZLength(0.25);
  cube->SetBounds(-1, -0.50, -1, -0.87, -1, -0.75);



  vtkSmartPointer<vtkPolyDataMapper> mapper =
      vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(cube->GetOutputPort());


  vtkSmartPointer<vtkActor> cubeActor =
      vtkSmartPointer<vtkActor>::New();
  cubeActor->SetMapper(mapper);
  cubeActor->GetProperty()->SetDiffuseColor(actorColor.GetData());






  // A renderer and render window
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);

  vtkSmartPointer<vtkCubeAxesActor> cubeAxesActor =
      vtkSmartPointer<vtkCubeAxesActor>::New();
  cubeAxesActor->SetUseTextActor3D(1);
  cubeAxesActor->SetCamera(renderer->GetActiveCamera());
  cubeAxesActor->GetTitleTextProperty(0)->SetColor(axis1Color.GetData());
  cubeAxesActor->GetTitleTextProperty(0)->SetFontSize(48);
  cubeAxesActor->GetLabelTextProperty(0)->SetColor(axis1Color.GetData());

  cubeAxesActor->GetTitleTextProperty(1)->SetColor(axis2Color.GetData());
  cubeAxesActor->GetLabelTextProperty(1)->SetColor(axis2Color.GetData());

  cubeAxesActor->GetTitleTextProperty(2)->SetColor(axis3Color.GetData());
  cubeAxesActor->GetLabelTextProperty(2)->SetColor(axis3Color.GetData());

  cubeAxesActor->DrawXGridlinesOn();
  cubeAxesActor->DrawYGridlinesOn();
  cubeAxesActor->DrawZGridlinesOn();
#if VTK_MAJOR_VERSION == 6
  cubeAxesActor->SetGridLineLocation(VTK_GRID_LINES_FURTHEST);
#endif
#if VTK_MAJOR_VERSION > 6
  cubeAxesActor->SetGridLineLocation(
      cubeAxesActor->VTK_GRID_LINES_FURTHEST);
#endif

  cubeAxesActor->XAxisMinorTickVisibilityOff();
  cubeAxesActor->YAxisMinorTickVisibilityOff();
  cubeAxesActor->ZAxisMinorTickVisibilityOff();


  cubeAxesActor->SetXAxisRange(0, 16);
  cubeAxesActor->SetYAxisRange(0, 16);
  cubeAxesActor->SetZAxisRange(0, 16);


  cubeAxesActor->SetFlyModeToStaticEdges();
  renderer->AddActor(cubeAxesActor);
  renderer->AddActor(cubeActor);
  renderer->GetActiveCamera()->Azimuth(30);
  renderer->GetActiveCamera()->Elevation(30);

  renderer->ResetCamera();
  renderer->SetBackground(backgroundColor.GetData());

  // An interactor
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);

  // Create the widget and its representation
  vtkSmartPointer<vtkTexturedButtonRepresentation2D> buttonRepresentation =
    vtkSmartPointer<vtkTexturedButtonRepresentation2D>::New();
  buttonRepresentation->SetNumberOfStates(2);
  buttonRepresentation->SetButtonTexture(0, image1);
  buttonRepresentation->SetButtonTexture(1, image2);

//HERE IS WHERE I TRY TO OBTAIN THE BUTTON STATE AND DEFINE AN EVENT
  int state = buttonRepresentation->GetState;

  if (state == 1)
  {
      cube->SetXLength(0.60);
      cube->SetYLength(0.23);
      cube->SetZLength(0.35);
      cube->SetBounds(-1, -0.25, -1, -0.65, -1, -0.45);
  }


  vtkSmartPointer<vtkButtonWidget> buttonWidget =
    vtkSmartPointer<vtkButtonWidget>::New();
  buttonWidget->SetInteractor(renderWindowInteractor);
  buttonWidget->SetRepresentation(buttonRepresentation);


  // Add the actors to the scene
  renderer->SetBackground(.1, .2, .5);

  renderWindow->SetSize(700, 700);
  renderWindow->Render();

  // Place the widget. Must be done after a render so that the
  // viewport is defined.
  // Here the widget placement is in normalized display coordinates
  vtkSmartPointer<vtkCoordinate> upperRight =
    vtkSmartPointer<vtkCoordinate>::New();
  upperRight->SetCoordinateSystemToNormalizedDisplay();
  upperRight->SetValue(1.0, 1.0);

  double bds[6];
  double sz = 50.0;
  bds[0] = upperRight->GetComputedDisplayValue(renderer)[0] - sz;
  bds[1] = bds[0] + sz;
  bds[2] = upperRight->GetComputedDisplayValue(renderer)[1] - sz;
  bds[3] = bds[2] + sz;
  bds[4] = bds[5] = 0.0;

  // Scale to 1, default is .5
  buttonRepresentation->SetPlaceFactor(1);
  buttonRepresentation->PlaceWidget(bds);

  buttonWidget->On();



  // Begin mouse interaction
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

void CreateImage(vtkSmartPointer<vtkImageData> image,
                 unsigned char* color1,
                 unsigned char* color2)
{
  // Specify the size of the image data
  image->SetDimensions(10, 10, 1);
  image->AllocateScalars(VTK_UNSIGNED_CHAR, 3);

  int* dims = image->GetDimensions();

  // Fill the image with
  for (int y = 0; y < dims[1]; y++)
  {
    for (int x = 0; x < dims[0]; x++)
    {
      unsigned char* pixel =
        static_cast<unsigned char*>(image->GetScalarPointer(x, y, 0));
      if (x < 5)
      {
        pixel[0] = color1[0];
        pixel[1] = color1[1];
        pixel[2] = color1[2];
      }
      else
      {
        pixel[0] = color2[0];
        pixel[1] = color2[1];
        pixel[2] = color2[2];
      }
    }
  }
}

В чем проблема?Как я мог решить это?Спасибо