/home/marsyas/marsyas/src/marsyas/MarControlAccessor.h

/*
** Copyright (C) 1998-2006 George Tzanetakis <gtzan@cs.uvic.ca>
**  
** 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.
** 
** This program 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 General Public License for more details.
** 
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software 
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

//#ifndef __MARCONTROL__
//#error Do not include this file directly, include only MarControl.h
//#endif
#include "MarControl.h"


namespace Marsyas
{
    class MarControlAccessor
    {
    private:
        MarControlPtr ctrl_;
        bool update_;
        bool readOnlyAccess_;

    public:
        MarControlAccessor(MarControlPtr ctrl, bool update = true, bool readOnlyAccess = false)
        {
            ctrl_ = ctrl;
            update_ = update;
            readOnlyAccess_ = readOnlyAccess;
        }

        ~MarControlAccessor()
        {
            #ifdef MARSYAS_TRACECONTROLS
            ctrl_->value_->setDebugValue();
            #endif

            if(update_)
                ctrl_->value_->callMarSystemsUpdate();
        }

        void enableUpdates() {update_ = true;};
        void disableUpdates(){update_ = false;};

        template<class T> T& to()
        {
                return const_cast<T&>(ctrl_->to<T>());
        }
    };
}

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