Method Update

IO/Import/vtkImporter.cxx:49–90

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
bool vtkImporter::Update()
{
  this->UpdateStatus = vtkImporter::UpdateStatusEnum::SUCCESS;

  // if there is no render window, create one
  if (this->RenderWindow == nullptr)
  {
    vtkDebugMacro(<< "Creating a RenderWindow\n");
    this->RenderWindow = vtkRenderWindow::New();
  }

  // Get the first renderer in the render window
  vtkRenderer* renderer = this->RenderWindow->GetRenderers()->GetFirstRenderer();
  if (renderer == nullptr)
  {
    vtkDebugMacro(<< "Creating a Renderer\n");
    this->Renderer = vtkRenderer::New();
    renderer = this->Renderer;
    this->RenderWindow->AddRenderer(renderer);
  }
  else
  {
    if (this->Renderer)
    {
      this->Renderer->UnRegister(nullptr);
    }
    this->Renderer = renderer;
    this->Renderer->Register(this);
  }

  if (this->ImportBegin())
  {
    this->ReadData();
    this->ImportEnd();
  }
  else
  {
    this->UpdateStatus = vtkImporter::UpdateStatusEnum::FAILURE;
  }

  return this->UpdateStatus == vtkImporter::UpdateStatusEnum::SUCCESS;
}

//------------------------------------------------------------------------------
void vtkImporter::PrintSelf(ostream& os, vtkIndent indent)