AlgorithmFactoryObserver.cpp

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2019 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#include "MantidAPI/AlgorithmFactoryObserver.h"
 
namespace {
template <typename Observer> void modifyObserver(const bool turnOn, bool &isObserving, Observer &observer) {
  if (turnOn && !isObserving) {
    Mantid::API::AlgorithmFactory::Instance().notificationCenter.addObserver(observer);
  } else if (!turnOn && isObserving) {
    Mantid::API::AlgorithmFactory::Instance().notificationCenter.removeObserver(observer);
  }
  isObserving = turnOn;
}
} // namespace
 
namespace Mantid::API {
 
AlgorithmFactoryObserver::AlgorithmFactoryObserver()
    : m_updateObserver(*this, &AlgorithmFactoryObserver::_updateHandle) {}
 
AlgorithmFactoryObserver::~AlgorithmFactoryObserver() {
  // Turn off/remove all observers
  this->observeUpdate(false);
}
 
// ------------------------------------------------------------
// Observe Methods
// ------------------------------------------------------------
 
void AlgorithmFactoryObserver::observeUpdate(bool turnOn) {
  modifyObserver(turnOn, m_observingUpdate, m_updateObserver);
}
 
// ------------------------------------------------------------
// Virtual Methods
// ------------------------------------------------------------
 
void AlgorithmFactoryObserver::updateHandle() {}
 
// ------------------------------------------------------------
// Private Methods
// ------------------------------------------------------------
void AlgorithmFactoryObserver::_updateHandle(AlgorithmFactoryUpdateNotification_ptr pNf) {
  UNUSED_ARG(pNf)
  this->updateHandle();
}
 
} // namespace Mantid::API