automation_control.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 <iostream>

#include "ardour/automation_control.h"
#include "ardour/automation_watch.h"
#include "ardour/event_type_map.h"
#include "ardour/session.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;

AutomationControl::AutomationControl(ARDOUR::Session&                          session,
                                     const Evoral::Parameter&                  parameter,
                                     const ParameterDescriptor&                desc,
                                     boost::shared_ptr<ARDOUR::AutomationList> list,
                                     const string&                             name)
        : Controllable (name.empty() ? EventTypeMap::instance().to_symbol(parameter) : name)
        , Evoral::Control(parameter, desc, list)
        , _session(session)
        , _desc(desc)
{
}

AutomationControl::~AutomationControl ()
{
}

double
AutomationControl::get_value() const
{
        bool from_list = _list && ((AutomationList*)_list.get())->automation_playback();
        return Control::get_double (from_list, _session.transport_frame());
}

void
AutomationControl::set_value (double value)
{
        bool to_list = _list && ((AutomationList*)_list.get())->automation_write();

        Control::set_double (value, _session.transport_frame(), to_list);

        Changed(); /* EMIT SIGNAL */
}

void
AutomationControl::set_list (boost::shared_ptr<Evoral::ControlList> list)
{
        Control::set_list (list);
        Changed();  /* EMIT SIGNAL */
}

void
AutomationControl::set_automation_state (AutoState as)
{
        if (_list && as != alist()->automation_state()) {

                alist()->set_automation_state (as);
                if (_desc.toggled) {
                        return;  // No watch for boolean automation
                }

                if (as == Write) {
                        AutomationWatch::instance().add_automation_watch (shared_from_this());
                } else if (as == Touch) {
                        if (!touching()) {
                                AutomationWatch::instance().remove_automation_watch (shared_from_this());
                        } else {
                                /* this seems unlikely, but the combination of
                                 * a control surface and the mouse could make
                                 * it possible to put the control into Touch
                                 * mode *while* touching it.
                                 */
                                AutomationWatch::instance().add_automation_watch (shared_from_this());
                        }
                } else {
                        AutomationWatch::instance().remove_automation_watch (shared_from_this());
                }
        }
}

void
AutomationControl::set_automation_style (AutoStyle as)
{
        if (!_list) return;
        alist()->set_automation_style (as);
}

void
AutomationControl::start_touch(double when)
{
        if (!_list) return;
        if (!touching()) {
                if (alist()->automation_state() == Touch) {
                        alist()->start_touch (when);
                        if (!_desc.toggled) {
                                AutomationWatch::instance().add_automation_watch (shared_from_this());
                        }
                }
                set_touching (true);
        }
}

void
AutomationControl::stop_touch(bool mark, double when)
{
        if (!_list) return;
        if (touching()) {
                set_touching (false);
                if (alist()->automation_state() == Touch) {
                        alist()->stop_touch (mark, when);
                        if (!_desc.toggled) {
                                AutomationWatch::instance().remove_automation_watch (shared_from_this());
                        }
                }
        }
}