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/*
Copyright (C) 2010-2011 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 __libardour_proxy_controllable_h__
#define __libardour_proxy_controllable_h__
#include <boost/function.hpp>
#include "pbd/controllable.h"
namespace ARDOUR {
/** this class converts a pair of setter/getter functors into a Controllable
so that it can be used like a regular Controllable, bound to MIDI, OSC etc.
*/
class LIBARDOUR_API ProxyControllable : public PBD::Controllable {
public:
ProxyControllable (const std::string& name, PBD::Controllable::Flag flags,
boost::function1<bool,double> setter,
boost::function0<double> getter)
: PBD::Controllable (name, flags)
, _setter (setter)
, _getter (getter)
{}
void set_value (double v, PBD::Controllable::GroupControlDisposition gcd) { if (_setter (v)) { Changed (true, gcd); /* EMIT SIGNAL */ } }
double get_value () const { return _getter (); }
double internal_to_user (double i) const { return accurate_coefficient_to_dB (i);}
double user_to_internal (double u) const { return dB_to_coefficient(u) ;}
std::string get_user_string () const {
char theBuf[32]; sprintf( theBuf, "%3.1f dB", accurate_coefficient_to_dB (get_value()));
return std::string(theBuf);
}
private:
boost::function1<bool,double> _setter;
boost::function0<double> _getter;
};
} // namespace
#endif /* __libardour_proxy_controllable_h__ */
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