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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/error.h"
#include "ardour/automatable.h"
#include "ardour/automation_control.h"
#include "ardour/session.h"
#include "ardour_ui.h"
#include "utils.h"
#include "automation_controller.h"
#include "gui_thread.h"
#include "i18n.h"
using namespace ARDOUR;
using namespace Gtk;
AutomationController::AutomationController(boost::shared_ptr<Automatable> printer, boost::shared_ptr<AutomationControl> ac, Adjustment* adj)
: BarController (*adj, ac)
, _ignore_change(false)
, _printer (printer)
, _controllable(ac)
, _adjustment(adj)
{
assert (_printer);
set_name (X_("PluginSlider")); // FIXME: get yer own name!
set_style (BarController::LeftToRight);
set_use_parent (true);
StartGesture.connect (sigc::mem_fun(*this, &AutomationController::start_touch));
StopGesture.connect (sigc::mem_fun(*this, &AutomationController::end_touch));
_adjustment->signal_value_changed().connect (
sigc::mem_fun(*this, &AutomationController::value_adjusted));
_screen_update_connection = ARDOUR_UI::RapidScreenUpdate.connect (
sigc::mem_fun (*this, &AutomationController::display_effective_value));
ac->Changed.connect (_changed_connection, invalidator (*this), boost::bind (&AutomationController::value_changed, this), gui_context());
}
AutomationController::~AutomationController()
{
}
boost::shared_ptr<AutomationController>
AutomationController::create(
boost::shared_ptr<Automatable> printer,
const Evoral::Parameter& param,
boost::shared_ptr<AutomationControl> ac)
{
Gtk::Adjustment* adjustment = manage (
new Gtk::Adjustment (
ac->internal_to_interface (param.normal()),
ac->internal_to_interface (param.min()),
ac->internal_to_interface (param.max()),
(param.max() - param.min()) / 100.0,
(param.max() - param.min()) / 10.0
)
);
assert (ac);
assert(ac->parameter() == param);
return boost::shared_ptr<AutomationController>(new AutomationController(printer, ac, adjustment));
}
std::string
AutomationController::get_label (double& xpos)
{
xpos = 0.5;
return _printer->value_as_string (_controllable);
}
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()));
}
}
void
AutomationController::start_touch()
{
_controllable->start_touch (_controllable->session().transport_frame());
}
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);
}
}
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 ();
}