/****************************************************************************
** $Id: rs_settings.h 1813 2004-01-31 23:31:24Z andrew $
**
** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
**
** This file is part of the qcadlib Library project.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid qcadlib Professional Edition licenses may use 
** this file in accordance with the qcadlib Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.ribbonsoft.com for further details.
**
** Contact info@ribbonsoft.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/


#ifndef RS_SETTINGS_H
#define RS_SETTINGS_H

#include <iostream>
#include <qglobal.h>

#if QT_VERSION>=0x030000
#include <qsettings.h>
#endif

#include "rs_string.h"
#include "rs_dict.h"

#define RS_SETTINGS RS_Settings::instance()

/**
 * This class can store and reload settings from a 
 * configuration file or the windoze registry.
 * Please note that the Qt default implementation doesn't
 * work as one would expect. That's why this class overwrites
 * most of the default behaviour.
 * 
 */
class RS_Settings {
public:
    RS_Settings();

public:
    /**
     * @return Instance to the unique settings object.
     */
    static RS_Settings* instance() {
        if (uniqueInstance==NULL) {
            uniqueInstance = new RS_Settings();
        }
        return uniqueInstance;
    }

    /**
     * Initialize the system.
     *
     * @param appName Application name
     * @param appDirName Application directory name used for 
     *     subdirectories in /usr, /etc ~/.
     */
    void init(const RS_String& companyKey, const RS_String& appKey);

    void beginGroup(const RS_String& group);
    void endGroup();

    bool writeEntry(const RS_String& key, int value);
    bool writeEntry(const RS_String& key, double value);
    bool writeEntry(const RS_String& key, const RS_String& value);
    RS_String readEntry(const RS_String& key,
                        const RS_String& def = RS_String::null,
                        bool* ok = 0);
    int readNumEntry(const RS_String& key, int def=0, bool* ok=0);
	
    RS_String readEntryCache(const RS_String& key);
	void addToCache(const RS_String& key, const RS_String& value);

public:
    ~RS_Settings();

protected:
    static RS_Settings* uniqueInstance;

	RS_Dict<RS_String> cache;
    RS_String companyKey;
    RS_String appKey;
    RS_String group;
    bool initialized;
};

#endif