Paul Davis
01e006e46e
git-svn-id: svn://localhost/ardour2/branches/3.0@9746 d708f5d6-7413-0410-9779-e7cbd77b26cf
134 lines
3.4 KiB
C++
134 lines
3.4 KiB
C++
/*
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Copyright (C) 1998-2007 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: volume_controller.cc,v 1.4 2000/05/03 15:54:21 pbd Exp $
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*/
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#include <algorithm>
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#include <string.h>
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#include <limits.h>
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#include "pbd/controllable.h"
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#include "pbd/stacktrace.h"
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#include "gtkmm2ext/gui_thread.h"
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#include "ardour/dB.h"
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#include "ardour/utils.h"
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#include "volume_controller.h"
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using namespace Gtk;
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VolumeController::VolumeController (Glib::RefPtr<Gdk::Pixbuf> p,
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boost::shared_ptr<PBD::Controllable> c,
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double def,
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double step,
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double page,
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bool with_numeric,
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int subw,
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int subh,
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bool linear,
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bool dB)
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: MotionFeedback (p, MotionFeedback::Rotary, c, def, step, page, "", with_numeric, subw, subh)
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, _linear (linear)
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, _controllable_uses_dB (dB)
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{
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set_print_func (VolumeController::_dB_printer, this);
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if (step < 1.0) {
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value->set_width_chars (6 + abs ((int) ceil (log10 (step))));
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} else {
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value->set_width_chars (5); // -NNdB
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}
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}
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void
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VolumeController::_dB_printer (char buf[32], const boost::shared_ptr<PBD::Controllable>& c, void* arg)
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{
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VolumeController* vc = reinterpret_cast<VolumeController*>(arg);
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vc->dB_printer (buf, c);
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}
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void
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VolumeController::dB_printer (char buf[32], const boost::shared_ptr<PBD::Controllable>& c)
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{
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if (c) {
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if (_linear) {
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/* controllable units are in dB so just show the value */
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if (step_inc < 1.0) {
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snprintf (buf, 32, "%.2f dB", c->get_value());
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} else {
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snprintf (buf, 32, "%ld dB", lrint (c->get_value()));
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}
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} else {
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double gain_coefficient;
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if (!_controllable_uses_dB) {
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gain_coefficient = c->get_value();
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} else {
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double fract = (c->get_value() - c->lower()) / (c->upper() - c->lower());
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gain_coefficient = slider_position_to_gain (fract);
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}
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if (step_inc < 1.0) {
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snprintf (buf, 32, "%.2f dB", accurate_coefficient_to_dB (gain_coefficient));
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} else {
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snprintf (buf, 32, "%ld dB", lrint (accurate_coefficient_to_dB (gain_coefficient)));
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}
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}
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} else {
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snprintf (buf, sizeof (buf), "--");
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}
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}
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double
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VolumeController::to_control_value (double display_value)
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{
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double v;
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/* display value is always clamped to 0.0 .. 1.0 */
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display_value = std::max (0.0, std::min (1.0, display_value));
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if (_linear) {
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v = _controllable->lower() + ((_controllable->upper() - _controllable->lower()) * display_value);
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} else {
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v = slider_position_to_gain (display_value);
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}
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return v;
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}
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double
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VolumeController::to_display_value (double control_value)
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{
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double v;
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if (_linear) {
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v = (control_value - _controllable->lower ()) / (_controllable->upper() - _controllable->lower());
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} else {
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v = gain_to_slider_position (control_value);
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}
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return v;
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}
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