Method SetNumberOfHandles

Interaction/Widgets/vtkPolyLineRepresentation.cxx:86–128

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//------------------------------------------------------------------------------
void vtkPolyLineRepresentation::SetNumberOfHandles(int npts)
{
  if (this->NumberOfHandles == npts)
  {
    return;
  }
  if (npts < 1)
  {
    vtkGenericWarningMacro(<< "vtkPolyLineRepresentation: minimum of 1 points required.");
    return;
  }

  // Ensure that no handle is current
  this->HighlightHandle(nullptr);

  if (this->PolyLineSource->GetPoints())
  {
    this->ReconfigureHandles(npts);
  }
  else
  {
    // allocate the handles
    this->CreateDefaultHandles(npts);
  }

  this->NumberOfHandles = npts;

  if (this->Directional && this->NumberOfHandles >= 2)
  {
    this->PointHandles[this->NumberOfHandles - 1]->SetDirectional(true);
  }

  if (this->CurrentHandleIndex >= 0 && this->CurrentHandleIndex < this->NumberOfHandles)
  {
    this->CurrentHandleIndex = this->HighlightHandle(this->HandleActors[this->CurrentHandleIndex]);
  }
  else
  {
    this->CurrentHandleIndex = this->HighlightHandle(nullptr);
  }

  this->BuildRepresentation();
}

//------------------------------------------------------------------------------
void vtkPolyLineRepresentation::ClearHandles()