berryIHandlerListener.h

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

BlueBerry Platform

Copyright (c) German Cancer Research Center,
Division of Medical and Biological Informatics.
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 or http://www.mitk.org for details.

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


#ifndef BERRYIHANDLERLISTENER_H_
#define BERRYIHANDLERLISTENER_H_

#include <berryMessage.h>

#include <org_blueberry_core_commands_Export.h>

namespace berry {

template<class T> class SmartPointer;

class HandlerEvent;

struct BERRY_COMMANDS IHandlerListener
{

  struct Events {

    typedef Message1<const SmartPointer<HandlerEvent>&> Event;

    Event handlerChanged;

    void AddListener(IHandlerListener* listener);
    void RemoveListener(IHandlerListener* listener);

  private:
    typedef MessageDelegate1<IHandlerListener, const SmartPointer<HandlerEvent>&> Delegate;
  };

  virtual ~IHandlerListener();

  virtual void HandlerChanged(const SmartPointer<HandlerEvent>& handlerEvent) = 0;
};

}

#endif /* BERRYIHANDLERLISTENER_H_ */