Method RenderOverlay

Rendering/Annotation/vtkPieChartActor.cxx:202–241

------------------------------------------------------------------------------ Plot scalar data for each input dataset.

//------------------------------------------------------------------------------
// Plot scalar data for each input dataset.
int vtkPieChartActor::RenderOverlay(vtkViewport* viewport)
{
  int renderedSomething = 0;

  if (!this->BuildPlot(viewport))
  {
    return 0;
  }

  // Done rebuilding, render as appropriate.
  if (this->GetInput() == nullptr || this->N <= 0)
  {
    vtkErrorMacro(<< "Nothing to plot!");
    return 0;
  }

  if (this->TitleVisibility)
  {
    renderedSomething += this->TitleActor->RenderOverlay(viewport);
  }

  this->WebActor->SetProperty(this->GetProperty());
  renderedSomething += this->PlotActor->RenderOverlay(viewport);
  renderedSomething += this->WebActor->RenderOverlay(viewport);

  if (this->LabelVisibility)
  {
    for (int i = 0; i < this->N; i++)
    {
      renderedSomething += this->PieceActors[i]->RenderOverlay(viewport);
    }
  }

  if (this->LegendVisibility)
  {
    renderedSomething += this->LegendActor->RenderOverlay(viewport);
  }

  return renderedSomething;
}

//------------------------------------------------------------------------------
// Plot scalar data for each input dataset.