niftkQtSignalCollector.h

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/*=============================================================================

  NifTK: A software platform for medical image computing.

  Copyright (c) University College London (UCL). All rights reserved.

  This software is distributed WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.

  See LICENSE.txt in the top level directory for details.

=============================================================================*/

#ifndef niftkQtSignalCollector_h
#define niftkQtSignalCollector_h

#include <QObject>

#include <mitkCommon.h>
#include <itkObject.h>
#include <itkObjectFactory.h>

#include <vector>

namespace niftk
{

class QtSignalListener
{
public:
  virtual void OnQtSignalReceived(const QObject* object, const char* signal) = 0;
};


class QtSignalNotifier : public QObject
{
  Q_OBJECT

public:

  QtSignalNotifier(QtSignalListener* signalListener, const QObject* object, const char* signal);

  virtual ~QtSignalNotifier();

private slots:

  virtual void OnQtSignalReceived();

private:

  QtSignalListener* m_QtSignalListener;
  const QObject* m_Object;
  QByteArray m_Signal;
};


class QtSignalCollector : public QObject, public itk::Object, private QtSignalListener
{
  Q_OBJECT

public:
  mitkClassMacroItkParent(QtSignalCollector, QObject)
  itkNewMacro(QtSignalCollector)

  typedef std::pair<const QObject*, QByteArray> Signal;
  typedef std::vector<Signal> Signals;

  void Connect(const QObject* object, const char* signal = 0);

  void AddListener(QtSignalListener* listener);

  void RemoveListener(QtSignalListener* listener);

  const Signals& GetSignals() const;

  Signals GetSignals(const char* signal) const;

  Signals GetSignals(const QObject* object, const char* signal = 0) const;

  virtual void Clear();

protected:

  QtSignalCollector();

  virtual ~QtSignalCollector();

  virtual void PrintSelf(std::ostream & os, itk::Indent indent) const override;

  virtual void OnQtSignalReceived(const QObject* object, const char* signal) override;

private:

  Signals m_Signals;

  std::vector<QtSignalNotifier*> m_SignalNotifiers;

  std::vector<QtSignalListener*> m_Listeners;

};

}

#endif