Method ProcessEvents

Rendering/Core/vtkInteractorStyle.cxx:1010–1505

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//------------------------------------------------------------------------------
void vtkInteractorStyle::ProcessEvents(
  vtkObject* vtkNotUsed(object), unsigned long event, void* clientdata, void* calldata)
{
  vtkInteractorStyle* self = reinterpret_cast<vtkInteractorStyle*>(clientdata);

  bool aborted = false;

  switch (event)
  {
    case vtkCommand::ExposeEvent:
      if (self->HandleObservers && self->HasObserver(vtkCommand::ExposeEvent))
      {
        self->InvokeEvent(vtkCommand::ExposeEvent, nullptr);
      }
      else
      {
        self->OnExpose();
      }
      break;

    case vtkCommand::ConfigureEvent:
      if (self->HandleObservers && self->HasObserver(vtkCommand::ConfigureEvent))
      {
        self->InvokeEvent(vtkCommand::ConfigureEvent, nullptr);
      }
      else
      {
        self->OnConfigure();
      }
      break;

    case vtkCommand::EnterEvent:
      if (self->HandleObservers && self->HasObserver(vtkCommand::EnterEvent))
      {
        self->InvokeEvent(vtkCommand::EnterEvent, nullptr);
      }
      else
      {
        self->OnEnter();
      }
      break;

    case vtkCommand::LeaveEvent:
      if (self->HandleObservers && self->HasObserver(vtkCommand::LeaveEvent))
      {
        self->InvokeEvent(vtkCommand::LeaveEvent, nullptr);
      }
      else
      {
        self->OnLeave();
      }
      break;

    case vtkCommand::TimerEvent:
    {
      // The calldata should be a timer id, but because of legacy we check
      // and make sure that it is non-nullptr.
      int timerId = (calldata ? *(reinterpret_cast<int*>(calldata)) : 1);