Method ScaleAction

Interaction/Widgets/vtkCameraPathWidget.cxx:162–202

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//------------------------------------------------------------------------------
void vtkCameraPathWidget::ScaleAction(vtkAbstractWidget* w)
{
  // We are in a static method, cast to ourself
  vtkCameraPathWidget* self = reinterpret_cast<vtkCameraPathWidget*>(w);

  // Get the event position
  int X = self->Interactor->GetEventPosition()[0];
  int Y = self->Interactor->GetEventPosition()[1];

  // Okay, make sure that the pick is in the current renderer
  if (!self->CurrentRenderer || !self->CurrentRenderer->IsInViewport(X, Y))
  {
    self->WidgetState = vtkCameraPathWidget::Start;
    return;
  }

  // Begin the widget interaction which has the side effect of setting the
  // interaction state.
  double e[2];
  e[0] = static_cast<double>(X);
  e[1] = static_cast<double>(Y);
  self->WidgetRep->StartWidgetInteraction(e);
  int interactionState = self->WidgetRep->GetInteractionState();
  if (interactionState == vtkCameraPathRepresentation::Outside)
  {
    return;
  }

  // We are definitely selected
  self->WidgetState = vtkCameraPathWidget::Active;
  self->GrabFocus(self->EventCallbackCommand);
  // Scale
  reinterpret_cast<vtkCameraPathRepresentation*>(self->WidgetRep)
    ->SetInteractionState(vtkCameraPathRepresentation::Scaling);

  // start the interaction
  self->EventCallbackCommand->SetAbortFlag(1);
  self->StartInteraction();
  self->InvokeEvent(vtkCommand::StartInteractionEvent, nullptr);
  self->Render();
}

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void vtkCameraPathWidget::MoveAction(vtkAbstractWidget* w)