Method SetLineCount

Interaction/Widgets/vtkMultiLineWidget.cxx:35–73

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//------------------------------------------------------------------------------
void vtkMultiLineWidget::SetLineCount(int newLineCount)
{
  if (newLineCount < 0)
  {
    vtkWarningMacro(<< newLineCount << " is an invalid line count.");
    return;
  }

  if (newLineCount == this->LineCount)
  {
    return;
  }

  vtkMultiLineRepresentation* multiLineRepresentation = this->GetMultiLineRepresentation();
  if (multiLineRepresentation != nullptr)
  {
    multiLineRepresentation->SetLineCount(newLineCount);
  }

  this->LineWidgetVector.resize(newLineCount);

  // If we have more lines than before, we set the new representation for these lines
  for (int i = this->LineCount; i < newLineCount; i++)
  {
    auto lineWidget = vtkSmartPointer<vtkLineWidget2>::New();
    lineWidget->SetInteractor(this->Interactor);
    if (multiLineRepresentation != nullptr)
    {
      lineWidget->SetRepresentation(multiLineRepresentation->GetLineRepresentation(i));
      lineWidget->GetRepresentation()->SetRenderer(this->CurrentRenderer);
    }
    lineWidget->SetEnabled(this->Enabled);
    lineWidget->SetParent(this); // the line now watches events of this widget

    this->LineWidgetVector[i] = lineWidget;
  }
  this->LineCount = newLineCount;
  this->Modified();
}

//------------------------------------------------------------------------------
void vtkMultiLineWidget::SetInteractor(vtkRenderWindowInteractor* interactor)