2 Copyright (C) 1998-2007 Paul Davis
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License as published by
5 the Free Software Foundation; either version 2 of the License, or
6 (at your option) any later version.
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 $Id: volume_controller.cc,v 1.4 2000/05/03 15:54:21 pbd Exp $
25 #include "pbd/controllable.h"
26 #include "pbd/stacktrace.h"
28 #include "gtkmm2ext/gui_thread.h"
30 #include "ardour/dB.h"
31 #include "ardour/rc_configuration.h"
32 #include "ardour/utils.h"
34 #include "volume_controller.h"
38 VolumeController::VolumeController (Glib::RefPtr<Gdk::Pixbuf> p,
39 boost::shared_ptr<PBD::Controllable> c,
48 : MotionFeedback (p, MotionFeedback::Rotary, c, def, step, page, "", with_numeric, subw, subh)
51 set_print_func (VolumeController::_dB_printer, this);
54 value->set_width_chars (6 + abs ((int) ceil (log10 (step))));
56 value->set_width_chars (5); // -NNdB
62 VolumeController::_dB_printer (char buf[32], const boost::shared_ptr<PBD::Controllable>& c, void* arg)
64 VolumeController* vc = reinterpret_cast<VolumeController*>(arg);
65 vc->dB_printer (buf, c);
69 VolumeController::dB_printer (char buf[32], const boost::shared_ptr<PBD::Controllable>& c)
75 double val = accurate_coefficient_to_dB (c->get_value());
79 snprintf (buf, 32, "+%5.2f dB", val);
81 snprintf (buf, 32, "%5.2f dB", val);
85 snprintf (buf, 32, "+%2ld dB", lrint (val));
87 snprintf (buf, 32, "%2ld dB", lrint (val));
93 double dB = accurate_coefficient_to_dB (c->get_value());
97 snprintf (buf, 32, "+%5.2f dB", dB);
99 snprintf (buf, 32, "%5.2f dB", dB);
103 snprintf (buf, 32, "+%2ld dB", lrint (dB));
105 snprintf (buf, 32, "%2ld dB", lrint (dB));
110 snprintf (buf, sizeof (buf), "--");
115 VolumeController::to_control_value (double display_value)
119 /* display value is always clamped to 0.0 .. 1.0 */
120 display_value = std::max (0.0, std::min (1.0, display_value));
123 v = _controllable->lower() + ((_controllable->upper() - _controllable->lower()) * display_value);
125 v = slider_position_to_gain_with_max (display_value, ARDOUR::Config->get_max_gain());
132 VolumeController::to_display_value (double control_value)
137 v = (control_value - _controllable->lower ()) / (_controllable->upper() - _controllable->lower());
139 // v = gain_to_slider_position_with_max (control_value, ARDOUR::Config->get_max_gain());
146 VolumeController::adjust (double control_delta)
148 return std::max (_controllable->lower(), std::min (_controllable->upper(), _controllable->get_value() + control_delta));