/***************************************************************************
 *   Copyright (C) 2005-2019 by the FIFE team                              *
 *   http://www.fifengine.net                                              *
 *   This file is part of FIFE.                                            *
 *                                                                         *
 *   FIFE is free software; you can redistribute it and/or                 *
 *    modify it under the terms of the GNU Lesser General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/
#ifndef FIFE_PERCENT_DONE_LISTENER_H
#define FIFE_PERCENT_DONE_LISTENER_H

// Standard C++ library includes
#include <vector>

// 3rd party library includes
#include "util/base/fife_stdint.h"

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder

namespace FIFE {
	class PercentDoneListener {
	public:
		virtual ~PercentDoneListener();
		virtual void OnEvent(unsigned int percentDone) = 0;
	};

	class PercentDoneCallback {
	public:
		PercentDoneCallback();
		virtual ~PercentDoneCallback();

		void setTotalNumberOfElements(unsigned int totalElements);
		void setPercentDoneInterval(unsigned int percent);
		void incrementCount();
		void reset();
		void addListener(PercentDoneListener* listener);
		void removeListener(PercentDoneListener* listener);

	private:
		void fireEvent(uint32_t percent);

	private:
		uint32_t m_totalElements;
		uint32_t m_percent;
		uint32_t m_numberOfEvents;
		uint32_t m_count;

		typedef std::vector<PercentDoneListener*> ListenerContainer;
		ListenerContainer m_listeners;
	};
}

#endif
