Control.h

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/*
  ZynAddSubFX - a software synthesizer
 
  Control.h - Defines a variable that can be controled from a frontend
 
  Copyright (C) 2009 Harald Hvaal
  Author: Harald Hvaal
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of version 2 of the GNU General Public License
  as published by the Free Software Foundation.
 
  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 (version 2 or later) for more details.
 
  You should have received a copy of the GNU General Public License (version 2)
  along with this program; if not, write to the Free Software Foundation,
  Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
*/
 
#ifndef _CONTROL_H_
#define _CONTROL_H_
 
#include <string>
 
class Control
{
    public:
        Control(Control *parent, string id);

        string getXMLRepresentation();

        void restoreFromXML(string xml);

        void registerControlUser(ControlUser *user);

        virtual string getStringRepresentation() = 0;
};
 
class FloatControl:public Control
{
    public:
        void setValue(float value, ControlUser *user = NULL);

        virtual string getStringRepresentation();
 
        float value();
};
 
class ControlUser
{
    public:
        virtual void controlUpdated(Control *control) = 0;
};
 
#endif /* _CONTROL_H_ */