Method OnRightButtonDown

Interaction/Widgets/vtkSplineWidget.cxx:715–784

}

void vtkSplineWidget::OnRightButtonDown()
{
  int X = this->Interactor->GetEventPosition()[0];
  int Y = this->Interactor->GetEventPosition()[1];

  // Okay, make sure that the pick is in the current renderer
  if (!this->CurrentRenderer || !this->CurrentRenderer->IsInViewport(X, Y))
  {
    this->State = vtkSplineWidget::Outside;
    return;
  }

  if (this->Interactor->GetShiftKey())
  {
    this->State = vtkSplineWidget::Inserting;
  }
  else if (this->Interactor->GetControlKey())
  {
    this->State = vtkSplineWidget::Erasing;
  }
  else
  {
    this->State = vtkSplineWidget::Scaling;
  }

  vtkAssemblyPath* path = this->GetAssemblyPath(X, Y, 0., this->HandlePicker);

  if (path != nullptr)
  {
    switch (this->State)
    {
      // deny insertion over existing handles
      case vtkSplineWidget::Inserting:
        this->State = vtkSplineWidget::Outside;
        return;
      case vtkSplineWidget::Erasing:
        this->CurrentHandleIndex = this->HighlightHandle(path->GetFirstNode()->GetViewProp());
        break;
      case vtkSplineWidget::Scaling:
        this->HighlightLine(1);
        break;
    }
  }
  else
  {
    // trying to erase handle but nothing picked
    if (this->State == vtkSplineWidget::Erasing)
    {
      this->State = vtkSplineWidget::Outside;
      return;
    }
    // try to insert or scale so pick the line
    path = this->GetAssemblyPath(X, Y, 0., this->LinePicker);

    if (path != nullptr)
    {
      this->HighlightLine(1);
    }