Method ProcessEvent

Modules/Core/src/Interactions/mitkDispatcher.cpp:105–227

}

bool mitk::Dispatcher::ProcessEvent(InteractionEvent *event)
{
  InteractionEvent::Pointer p = event;
  bool eventIsHandled = false;
  /* Filter out and handle Internal Events separately */
  auto *internalEvent = dynamic_cast<InternalEvent *>(event);
  if (internalEvent != nullptr)
  {
    eventIsHandled = HandleInternalEvent(internalEvent);
    // InternalEvents that are handled are not sent to the listeners
    if (eventIsHandled)
    {
      return true;
    }
  }

  auto selectedInteractor = m_SelectedInteractor.Lock();

  switch (m_ProcessingMode)
  {
    case CONNECTEDMOUSEACTION:
      // finished connected mouse action
      if (std::strcmp(p->GetNameOfClass(), "MouseReleaseEvent") == 0)
      {
        m_ProcessingMode = REGULAR;

        if (selectedInteractor.IsNotNull())
          eventIsHandled = selectedInteractor->HandleEvent(event, selectedInteractor->GetDataNode());

        m_SelectedInteractor = nullptr;
      }
      // give event to selected interactor
      selectedInteractor = m_SelectedInteractor.Lock();

      if (eventIsHandled == false && selectedInteractor.IsNotNull())
        eventIsHandled = selectedInteractor->HandleEvent(event, selectedInteractor->GetDataNode());

      break;

    case GRABINPUT:
      if (selectedInteractor.IsNotNull())
      {
        eventIsHandled = selectedInteractor->HandleEvent(event,selectedInteractor->GetDataNode());
        SetEventProcessingMode(selectedInteractor);
      }

      break;

    case PREFERINPUT:
      if (selectedInteractor.IsNotNull() &&
          selectedInteractor->HandleEvent(event, selectedInteractor->GetDataNode()) == true)
      {
        SetEventProcessingMode(selectedInteractor);
        eventIsHandled = true;
      }

      break;