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livetrax/libs/widgets/ardour_display.cc

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/*
* Copyright (C) 2014 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2017 Robin Gareus <robin@gareus.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <iostream>
#include <cmath>
#include <algorithm>
#include <pangomm/layout.h>
#include "pbd/compose.h"
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#include "pbd/controllable.h"
#include "pbd/error.h"
#include "gtkmm2ext/utils.h"
#include "gtkmm2ext/rgb_macros.h"
#include "gtkmm2ext/gui_thread.h"
#include "gtkmm2ext/keyboard.h"
#include "widgets/ardour_display.h"
#include "pbd/i18n.h"
using namespace Gtkmm2ext;
using namespace Gdk;
using namespace Gtk;
using namespace Glib;
using namespace PBD;
using namespace ArdourWidgets;
using std::max;
using std::min;
using namespace std;
ArdourDisplay::ArdourDisplay (Element e)
{
add_elements(ArdourButton::Text);
}
ArdourDisplay::~ArdourDisplay ()
{
}
bool
ArdourDisplay::on_scroll_event (GdkEventScroll* ev)
{
/* mouse wheel */
float scale = 1.0;
if (ev->state & Keyboard::GainFineScaleModifier) {
if (ev->state & Keyboard::GainExtraFineScaleModifier) {
scale *= 0.01;
} else {
scale *= 0.10;
}
}
std::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();
if (c) {
float val = c->get_interface();
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if ( ev->direction == GDK_SCROLL_UP )
val += 0.05 * scale; //by default, we step in 1/20ths of the knob travel
else
val -= 0.05 * scale;
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c->set_interface(val);
}
return true;
}
void
ArdourDisplay::add_controllable_preset (const char *txt, float val)
{
using namespace Menu_Helpers;
AddMenuElem(MenuElem (txt, sigc::bind (sigc::mem_fun(*this, &ArdourDisplay::handle_controllable_preset), val)));
}
static inline float dB_to_coefficient (float dB) {
return dB > -318.8f ? pow (10.0f, dB * 0.05f) : 0.0f;
}
void
ArdourDisplay::handle_controllable_preset (float p)
{
std::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();
if (!c) return;
/* This should not use dB_to_coefficient(), but the Controllable's value.
*
* The only user of this API is currently monitor_section.cc which conveniently
* binds dB values. Once there are other use-cases, for this, this (GUI only) API
* needs fixing.
*/
c->set_value(dB_to_coefficient (p), Controllable::NoGroup);
}
void
ArdourDisplay::set_controllable (std::shared_ptr<Controllable> c)
{
watch_connection.disconnect (); //stop watching the old controllable
if (!c) return;
binding_proxy.set_controllable (c);
c->Changed.connect (watch_connection, invalidator(*this), boost::bind (&ArdourDisplay::controllable_changed, this), gui_context());
controllable_changed();
}
void
ArdourDisplay::controllable_changed ()
{
std::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();
if (!c) return;
set_text(c->get_user_string());
set_dirty();
}