Method BuildTitle

Rendering/Annotation/vtkAxisActor2D.cxx:965–1004

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//------------------------------------------------------------------------------
void vtkAxisActor2D::BuildTitle(vtkViewport* viewport)
{
  this->TitleMapper->SetInput(this->Title);

  if (this->TitleTextProperty->GetMTime() > this->BuildTime)
  {
    // Shallow copy here so that the size of the title prop is not
    // affected by the automatic adjustment of its text mapper's
    // size (i.e. its mapper's text property is identical except for
    // the font size which will be modified later). This allows text
    // actors to share the same text property, and in that case
    // specifically allows the title and label text prop to be the same.
    this->TitleMapper->GetTextProperty()->ShallowCopy(this->TitleTextProperty);
  }

  int stringSize[2];
  this->SetTitleFontSize(viewport, stringSize);

  int* x1 = this->PositionCoordinate->GetComputedViewportValue(viewport);
  int* x2 = this->Position2Coordinate->GetComputedViewportValue(viewport);
  double tickPosition[3];
  tickPosition[0] = x1[0] + (x2[0] - x1[0]) * this->TitlePosition;
  tickPosition[1] = x1[1] + (x2[1] - x1[1]) * this->TitlePosition;

  double textOrientation = this->TitleTextProperty->GetOrientation();
  double theta = vtkMath::RadiansFromDegrees(textOrientation);

  double offset = this->TickLength + this->TickOffset;
  if (this->LabelVisibility)
  {
    offset += vtkAxisActor2D::ComputeStringOffset(
      this->LastMaxLabelSize[0], this->LastMaxLabelSize[1], theta);
  }

  int textPos[2];
  this->ShiftPosition(
    tickPosition, theta, stringSize[0], stringSize[1], static_cast<int>(offset), textPos);

  this->TitleActor->SetPosition(textPos[0], textPos[1]);
}

//------------------------------------------------------------------------------
void vtkAxisActor2D::UpdateCachedInformations(vtkViewport* viewport)