/***************************************************************************
            Functions.h  -  list of simple periodic functions
			     -------------------
    begin                : Jan 21 2001
    copyright            : (C) 2001 by Thomas Eschenbacher
    email                : Thomas Eschenbacher <thomas.eschenbacher@gmx.de>
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef FUNCTIONS_H
#define FUNCTIONS_H

#include "config.h"

#include "libkwave/TypesMap.h"
#include <QString>

namespace Kwave
{

    /**
     * @class Functions
     * Holds a list of simple periodic arithmetic functions. All functions are
     * normed to work within the interval [0...2 Pi]
     */
    class Functions
    {
    public:

	typedef double(periodic_function_t)(double);

	/** Constructor */
	Functions();

	/** Destructor */
	virtual ~Functions();

	/** Returns the number of functions */
	unsigned int count() const;

	/**
	 * Returns the name of a function. If the index is out of range,
	 * the returned name will be that of the "zero()" function.
	 * @param index [0...count-1]
	 */
	QString name(unsigned int index);

	/**
	 * Returns a reference to a function. If the index is out of range,
	 * the returned function will be "zero()".
	 * @param index [0...count-1]
	 */
	periodic_function_t &function(unsigned int index) const;

    private:

	class FunctionTypesMap:
	    public Kwave::TypesMap< unsigned int, periodic_function_t* >
	{
	public:
	    /** Constructor */
	    explicit FunctionTypesMap()
		:Kwave::TypesMap<unsigned int, periodic_function_t *>()
	    {
		fill();
	    }

	    /** fills the types map */
	    virtual void fill();
	};

	/** map of periodic functions */
	FunctionTypesMap m_functions_map;

    };
}

#endif /* FUNCTIONS_H */

//***************************************************************************
//***************************************************************************
