Method BuildRepresentation

Interaction/Widgets/vtkCaptionRepresentation.cxx:136–184

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//------------------------------------------------------------------------------
void vtkCaptionRepresentation::BuildRepresentation()
{
  if (this->GetMTime() > this->BuildTime || this->CaptionActor2D->GetMTime() > this->BuildTime ||
    (this->Renderer && this->Renderer->GetVTKWindow() &&
      this->Renderer->GetVTKWindow()->GetMTime() > this->BuildTime))
  {

    // If the text actor's text scaling is off, we still may want to be able
    // to change the caption's text to respond to changes in the border/box
    // sizing.  This is done using the *relative* font size factor. We will
    // also need to change the caption's boundary size accordingly. It
    // depends on the relationship between the fit of the text to the border.
    if (!this->Moving && this->CaptionActor2D && this->CaptionActor2D->GetCaption() &&
      this->CaptionActor2D->GetTextActor()->GetTextScaleMode() ==
        vtkTextActor::TEXT_SCALE_MODE_NONE)
    {
      // Create a dummy text mapper for managing font sizes.
      vtkNew<vtkTextMapper> textMapper;
      vtkTextProperty* tprop = textMapper->GetTextProperty();
      tprop->ShallowCopy(this->CaptionActor2D->GetCaptionTextProperty());
      textMapper->SetInput(this->CaptionActor2D->GetCaption());
      int textsize[2];
      int fsize = vtkTextMapper::SetRelativeFontSize(
        textMapper, this->Renderer, this->Renderer->GetSize(), textsize, 0.015 * this->FontFactor);

      if (this->Fit == VTK_FIT_TO_BORDER)
      {
        this->CaptionActor2D->GetCaptionTextProperty()->SetFontSize(fsize);
      }
      else // this->Fit == VTK_FIT_TO_TEXT
      {
      }
      this->AdjustCaptionBoundary();
    }

    // Ask the superclass the size and set the caption
    int* pos1 = this->PositionCoordinate->GetComputedDisplayValue(this->Renderer);
    int* pos2 = this->Position2Coordinate->GetComputedDisplayValue(this->Renderer);

    if (this->CaptionActor2D)
    {
      this->CaptionActor2D->GetPositionCoordinate()->SetValue(pos1[0], pos1[1]);
      this->CaptionActor2D->GetPosition2Coordinate()->SetValue(pos2[0], pos2[1]);
    }

    // Note that the transform is updated by the superclass
    this->Superclass::BuildRepresentation();
  }
}

//------------------------------------------------------------------------------
void vtkCaptionRepresentation::AdjustCaptionBoundary()