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livetrax/gtk2_ardour/automation_controller.cc

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/*
Copyright (C) 2007 Paul Davis
Author: David Robillard
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.
*/
#include <iomanip>
#include <cmath>
#include "pbd/compose.h"
#include "pbd/error.h"
#include "ardour/automatable.h"
#include "ardour/automation_control.h"
#include "ardour/session.h"
#include "ardour/tempo.h"
#include "ardour_button.h"
#include "ardour_ui.h"
#include "automation_controller.h"
#include "gui_thread.h"
#include "note_select_dialog.h"
#include "timers.h"
#include "i18n.h"
using namespace ARDOUR;
using namespace Gtk;
AutomationBarController::AutomationBarController (
boost::shared_ptr<Automatable> printer,
boost::shared_ptr<AutomationControl> ac,
Adjustment* adj)
: Gtkmm2ext::BarController(*adj, ac)
, _printer(printer)
, _controllable(ac)
{
}
std::string
AutomationBarController::get_label (double& xpos)
{
xpos = 0.5;
return _printer->value_as_string (_controllable);
}
AutomationBarController::~AutomationBarController()
{
}
AutomationController::AutomationController(boost::shared_ptr<Automatable> printer,
boost::shared_ptr<AutomationControl> ac,
Adjustment* adj)
: _widget(NULL)
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, _printer (printer)
, _controllable(ac)
, _adjustment(adj)
, _ignore_change(false)
{
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assert (_printer);
if (ac->toggled()) {
ArdourButton* but = manage(new ArdourButton());
// Apply styles for special types
if (ac->parameter().type() == MuteAutomation) {
but->set_name("mute button");
} else if (ac->parameter().type() == SoloAutomation) {
but->set_name("solo button");
} else {
but->set_name("generic button");
}
but->signal_clicked.connect(
sigc::mem_fun(*this, &AutomationController::toggled));
_widget = but;
} else {
AutomationBarController* bar = manage(new AutomationBarController(_printer, ac, adj));
bar->set_name(X_("ProcessorControlSlider"));
bar->StartGesture.connect(
sigc::mem_fun(*this, &AutomationController::start_touch));
bar->StopGesture.connect(
sigc::mem_fun(*this, &AutomationController::end_touch));
bar->signal_button_release_event().connect(
sigc::mem_fun(*this, &AutomationController::on_button_release));
_widget = bar;
}
_adjustment->signal_value_changed().connect(
sigc::mem_fun(*this, &AutomationController::value_adjusted));
_screen_update_connection = Timers::rapid_connect (
sigc::mem_fun (*this, &AutomationController::display_effective_value));
ac->Changed.connect (_changed_connection, invalidator (*this), boost::bind (&AutomationController::value_changed, this), gui_context());
add(*_widget);
show_all();
}
AutomationController::~AutomationController()
{
}
boost::shared_ptr<AutomationController>
AutomationController::create(boost::shared_ptr<Automatable> printer,
const Evoral::Parameter& param,
const ParameterDescriptor& desc,
boost::shared_ptr<AutomationControl> ac)
{
const double lo = ac->internal_to_interface(desc.lower);
const double up = ac->internal_to_interface(desc.upper);
const double normal = ac->internal_to_interface(desc.normal);
const double smallstep = ac->internal_to_interface(desc.lower + desc.smallstep);
const double largestep = ac->internal_to_interface(desc.lower + desc.largestep);
Gtk::Adjustment* adjustment = manage (
new Gtk::Adjustment (normal, lo, up, smallstep, largestep));
assert (ac);
assert(ac->parameter() == param);
return boost::shared_ptr<AutomationController>(new AutomationController(printer, ac, adjustment));
}
void
AutomationController::display_effective_value()
{
double const interface_value = _controllable->internal_to_interface(_controllable->get_value());
if (_adjustment->get_value () != interface_value) {
_ignore_change = true;
_adjustment->set_value (interface_value);
_ignore_change = false;
}
}
void
AutomationController::value_adjusted ()
{
if (!_ignore_change) {
_controllable->set_value (_controllable->interface_to_internal(_adjustment->get_value()));
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}
/* A bar controller will automatically follow the adjustment, but for a
button we have to do it manually. */
ArdourButton* but = dynamic_cast<ArdourButton*>(_widget);
if (but) {
const bool active = _adjustment->get_value() >= 0.5;
if (but->get_active() != active) {
but->set_active(active);
}
}
}
void
AutomationController::start_touch()
{
_controllable->start_touch (_controllable->session().transport_frame());
StartGesture.emit(); /* EMIT SIGNAL */
}
void
AutomationController::end_touch ()
{
if (_controllable->automation_state() == Touch) {
bool mark = false;
double when = 0;
if (_controllable->session().transport_rolling()) {
mark = true;
when = _controllable->session().transport_frame();
}
_controllable->stop_touch (mark, when);
}
StopGesture.emit(); /* EMIT SIGNAL */
}
void
AutomationController::toggled ()
{
ArdourButton* but = dynamic_cast<ArdourButton*>(_widget);
if (but) {
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if (_controllable->session().transport_rolling()) {
if (_controllable->automation_state() == Touch) {
_controllable->set_automation_state(Write);
}
if (_controllable->list()) {
_controllable->list()->set_in_write_pass(true, false, _controllable->session().audible_frame());
}
}
const bool was_active = _controllable->get_value() >= 0.5;
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if (was_active && but->get_active()) {
_adjustment->set_value(0.0);
but->set_active(false);
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} else if (!was_active && !but->get_active()) {
_adjustment->set_value(1.0);
but->set_active(true);
}
}
}
static double
midi_note_to_hz(int note)
{
const double tuning = 440.0;
return tuning * pow(2, (note - 69.0) / 12.0);
}
static double
clamp(double val, double min, double max)
{
if (val < min) {
return min;
} else if (val > max) {
return max;
}
return val;
}
void
AutomationController::run_note_select_dialog()
{
const ARDOUR::ParameterDescriptor& desc = _controllable->desc();
NoteSelectDialog* dialog = new NoteSelectDialog();
if (dialog->run() == Gtk::RESPONSE_ACCEPT) {
const double value = ((_controllable->desc().unit == ARDOUR::ParameterDescriptor::HZ)
? midi_note_to_hz(dialog->note_number())
: dialog->note_number());
_controllable->set_value(clamp(value, desc.lower, desc.upper));
}
delete dialog;
}
void
AutomationController::set_freq_beats(double beats)
{
const ARDOUR::ParameterDescriptor& desc = _controllable->desc();
const ARDOUR::Session& session = _controllable->session();
const framepos_t pos = session.transport_frame();
const ARDOUR::Tempo& tempo = session.tempo_map().tempo_at(pos);
const double bpm = tempo.beats_per_minute();
const double bps = bpm / 60.0;
const double freq = bps / beats;
_controllable->set_value(clamp(freq, desc.lower, desc.upper));
}
void
AutomationController::set_ratio(double ratio)
{
const ARDOUR::ParameterDescriptor& desc = _controllable->desc();
const double value = _controllable->get_value() * ratio;
_controllable->set_value(clamp(value, desc.lower, desc.upper));
}
bool
AutomationController::on_button_release(GdkEventButton* ev)
{
using namespace Gtk::Menu_Helpers;
if (ev->button != 3) {
return false;
}
const ARDOUR::ParameterDescriptor& desc = _controllable->desc();
if (desc.unit == ARDOUR::ParameterDescriptor::MIDI_NOTE) {
Gtk::Menu* menu = manage(new Menu());
MenuList& items = menu->items();
items.push_back(MenuElem(_("Select Note..."),
sigc::mem_fun(*this, &AutomationController::run_note_select_dialog)));
menu->popup(1, ev->time);
return true;
} else if (desc.unit == ARDOUR::ParameterDescriptor::HZ) {
Gtk::Menu* menu = manage(new Menu());
MenuList& items = menu->items();
items.push_back(MenuElem(_("Halve"),
sigc::bind(sigc::mem_fun(*this, &AutomationController::set_ratio),
0.5)));
items.push_back(MenuElem(_("Double"),
sigc::bind(sigc::mem_fun(*this, &AutomationController::set_ratio),
2.0)));
const bool is_audible = desc.upper > 40.0;
const bool is_low = desc.lower < 1.0;
if (is_audible) {
items.push_back(MenuElem(_("Select Note..."),
sigc::mem_fun(*this, &AutomationController::run_note_select_dialog)));
}
if (is_low) {
for (double beats = 1.0; beats <= 16; ++beats) {
items.push_back(MenuElem(string_compose(_("Set to %1 beat(s)"), (int)beats),
sigc::bind(sigc::mem_fun(*this, &AutomationController::set_freq_beats),
beats)));
}
}
menu->popup(1, ev->time);
return true;
}
return false;
}
void
AutomationController::value_changed ()
{
Gtkmm2ext::UI::instance()->call_slot (invalidator (*this), boost::bind (&AutomationController::display_effective_value, this));
}
/** Stop updating our value from our controllable */
void
AutomationController::stop_updating ()
{
_screen_update_connection.disconnect ();
}
void
AutomationController::disable_vertical_scroll ()
{
AutomationBarController* bar = dynamic_cast<AutomationBarController*>(_widget);
if (bar) {
bar->set_tweaks (
Gtkmm2ext::PixFader::Tweaks(bar->tweaks() |
Gtkmm2ext::PixFader::NoVerticalScroll));
}
}