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/* This file is part of Evoral.
* Copyright (C) 2008 David Robillard <http://drobilla.net>
* Copyright (C) 2000-2008 Paul Davis
*
* Evoral 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.
*
* Evoral 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 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.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef EVORAL_CONTROL_HPP
#define EVORAL_CONTROL_HPP
#include <set>
#include <map>
#include <boost/shared_ptr.hpp>
#include "pbd/signals.h"
#include "evoral/visibility.h"
#include "evoral/Parameter.hpp"
#include "evoral/ParameterDescriptor.hpp"
namespace Evoral {
class ControlList;
class ParameterDescriptor;
class Transport;
class TypeMap;
/** Base class representing some kind of (automatable) control; a fader's gain,
* for example, or a compressor plugin's threshold.
*
* The class knows the Evoral::Parameter that it is controlling, and has
* a list of values for automation.
*/
class LIBEVORAL_API Control
{
public:
Control(const Parameter& parameter,
const ParameterDescriptor& desc,
boost::shared_ptr<ControlList> list);
virtual ~Control() {}
virtual void set_double (double val, double frame=0, bool to_list=false);
virtual double get_double (bool from_list=false, double frame=0) const;
/** Get the latest user-set value
* (which may not equal get_value() when automation is playing back).
*
* Automation write/touch works by periodically sampling this value
* and adding it to the ControlList.
*/
double user_double() const { return _user_value; }
void set_list(boost::shared_ptr<ControlList>);
boost::shared_ptr<ControlList> list() { return _list; }
boost::shared_ptr<const ControlList> list() const { return _list; }
inline const Parameter& parameter() const { return _parameter; }
/** Emitted when the our ControlList is marked dirty */
PBD::Signal0<void> ListMarkedDirty;
protected:
Parameter _parameter;
boost::shared_ptr<ControlList> _list;
double _user_value;
PBD::ScopedConnection _list_marked_dirty_connection;
private:
void list_marked_dirty ();
};
} // namespace Evoral
#endif // EVORAL_CONTROL_HPP
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