Method OnLeftButtonDown

Interaction/Widgets/vtkBrokenLineWidget.cxx:524–566

}

void vtkBrokenLineWidget::OnLeftButtonDown()
{
  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 = vtkBrokenLineWidget::Outside;
    return;
  }

  this->State = vtkBrokenLineWidget::Moving;

  // Okay, we can process this. Try to pick handles first;
  // if no handles picked, then try to pick the line.
  vtkAssemblyPath* path = this->GetAssemblyPath(X, Y, 0., this->HandlePicker);

  if (path != nullptr)
  {
    this->CurrentHandleIndex = this->HighlightHandle(path->GetFirstNode()->GetViewProp());
  }
  else
  {
    path = this->GetAssemblyPath(X, Y, 0., this->LinePicker);

    if (path != nullptr)
    {
      this->HighlightLine(1);
    }
    else
    {
      this->CurrentHandleIndex = this->HighlightHandle(nullptr);
      this->State = vtkBrokenLineWidget::Outside;
      return;
    }
  }

  this->EventCallbackCommand->SetAbortFlag(1);
  this->StartInteraction();
  this->InvokeEvent(vtkCommand::StartInteractionEvent, nullptr);
  this->Interactor->Render();
}

void vtkBrokenLineWidget::OnLeftButtonUp()
{