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redirect_automation_time_axis.cc

/*
    Copyright (C) 2003 Paul Davis 

    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.

    $Id: redirect_automation_time_axis.cc,v 1.13 2005/04/19 17:12:36 pauld Exp $
*/

#include <ardour/redirect.h>
#include <ardour/session.h>
#include <cstdlib>

#include "redirect_automation_time_axis.h"
#include "automation_line.h"

#include "i18n.h"

using namespace ARDOUR;
using namespace Gtk;

RedirectAutomationTimeAxisView::RedirectAutomationTimeAxisView (Session& s, Route& r, PublicEditor& e, TimeAxisView& parent, Widget* p, std::string n,
                                                uint32_t prt, Redirect& rd, string state_name)

      : AxisView (s),
        AutomationTimeAxisView (s, r, e, parent, p, n, state_name, rd.name()),
        redirect (rd),
        port (prt)
      
{
      char buf[32];
      xml_node = 0;
      _marked_for_display = false;
      
      ensure_xml_node ();

      XMLNodeList kids;
      XMLNodeConstIterator iter;

      kids = xml_node->children ();

      snprintf (buf, sizeof(buf), "Port_%" PRIu32, port);
            
      for (iter = kids.begin(); iter != kids.end(); ++iter) {
            if ((*iter)->name() == buf) {
            
                  XMLProperty *shown = (*iter)->property("shown_editor");
                  
                  if (shown && shown->value() == "yes") {
                        _marked_for_display = true;
                  }
                  break;
            }
      }
}

RedirectAutomationTimeAxisView::~RedirectAutomationTimeAxisView ()
{
}

void
RedirectAutomationTimeAxisView::add_automation_event (GtkCanvasItem* item, GdkEvent* event, jack_nframes_t when, double y)
{
      double x = 0;

      gtk_canvas_item_w2i (canvas_display, &x, &y);

      /* compute vertical fractional position */

      if (y < 0)
            y = 0;
      else if (y > height)
            y = height;
      
      y = 1.0 - (y / height);

      /* map to model space */

      if (!lines.empty()) {
            AutomationList& alist (redirect.automation_list(port));
            string description = _("add automation event to ");
            description += redirect.describe_parameter (port);

            lines.front()->view_to_model_y (y);
            
            _session.begin_reversible_command (description);
            _session.add_undo (alist.get_memento());
            alist.add (when, y);
            _session.add_redo_no_execute (alist.get_memento());
            _session.commit_reversible_command ();
            _session.set_dirty ();
      }
}

void
RedirectAutomationTimeAxisView::ensure_xml_node ()
{
      if (xml_node == 0) {
            if ((xml_node = redirect.extra_xml ("GUI")) == 0) {
                  xml_node = new XMLNode ("GUI");
                  redirect.add_extra_xml (*xml_node);
            }
      }
}

guint32
RedirectAutomationTimeAxisView::show_at (double y, int& nth, Gtk::VBox *parent)
{
      ensure_xml_node ();
      update_extra_xml_shown (true);
      
      return TimeAxisView::show_at (y, nth, parent);
}

void
RedirectAutomationTimeAxisView::hide ()
{
      ensure_xml_node ();
      update_extra_xml_shown (false);

      TimeAxisView::hide ();
}


void
RedirectAutomationTimeAxisView::update_extra_xml_shown (bool editor_shown)
{
      char buf[32];

      XMLNodeList nlist = xml_node->children ();
      XMLNodeConstIterator i;
      XMLNode * port_node = 0;

      snprintf (buf, sizeof(buf), "Port_%" PRIu32, port);

      for (i = nlist.begin(); i != nlist.end(); ++i) {
            if ((*i)->name() == buf) {
                  port_node = (*i);
                  break;
            }
      }

      if (!port_node) {
            port_node = new XMLNode(buf);
            xml_node->add_child_nocopy(*port_node);
      }
      
      port_node->add_property ("shown_editor", editor_shown ? "yes": "no");
      
}

void
RedirectAutomationTimeAxisView::set_automation_state (AutoState state)
{
      if (!ignore_state_request) {
            redirect.automation_list (port).set_automation_state (state);
      }
}

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