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/*
Copyright (C) 2000-2007 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __pbd_controllable_h__
#define __pbd_controllable_h__
#include <string>
#include <set>
#include <sigc++/trackable.h>
#include <sigc++/signal.h>
#include "pbd/statefuldestructible.h"
class XMLNode;
namespace PBD {
class Controllable : public PBD::StatefulDestructible {
public:
Controllable (std::string name);
virtual ~Controllable() { Destroyed (this); }
virtual void set_value (float) = 0;
virtual float get_value (void) const = 0;
sigc::signal<void> LearningFinished;
static sigc::signal<void,PBD::Controllable*,int,int> CreateBinding;
static sigc::signal<void,PBD::Controllable*> DeleteBinding;
static sigc::signal<bool,PBD::Controllable*> StartLearning;
static sigc::signal<void,PBD::Controllable*> StopLearning;
static sigc::signal<void,Controllable*> Destroyed;
sigc::signal<void> Changed;
int set_state (const XMLNode&);
XMLNode& get_state ();
std::string name() const { return _name; }
bool touching () const { return _touching; }
void set_touching (bool yn) { _touching = yn; }
static Controllable* by_id (const PBD::ID&);
static Controllable* by_name (const std::string&);
private:
std::string _name;
bool _touching;
void add ();
void remove ();
typedef std::set<PBD::Controllable*> Controllables;
static Glib::Mutex* registry_lock;
static Controllables registry;
};
/* a utility class for the occasions when you need but do not have
a Controllable
*/
class IgnorableControllable : public Controllable
{
public:
IgnorableControllable () : PBD::Controllable ("ignoreMe") {}
~IgnorableControllable () {}
void set_value (float /*v*/) {}
float get_value () const { return 0.0; }
};
}
#endif /* __pbd_controllable_h__ */
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