/*
  timeline-layout-helper.cpp  -  Implementation of the timeline
  layout helper class
 
  Copyright (C)         Lumiera.org
    2008,               Joel Holdsworth <joel@airwebreathe.org.uk>
 
  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 <boost/foreach.hpp>

#include "timeline-layout-helper.hpp"
#include "../timeline-widget.hpp"
#include "../../model/sequence.hpp"

using namespace Gtk;
using namespace std;
using namespace boost;
using namespace lumiera;

namespace gui {
namespace widgets {
namespace timeline {
  
TimelineLayoutHelper::TimelineLayoutHelper(TimelineWidget &owner)
  : timelineWidget(owner)
{
}

void
TimelineLayoutHelper::clone_tree_from_sequence()
{
  const shared_ptr<model::Sequence> &sequence = timelineWidget.sequence;
  REQUIRE(sequence);
  
  layoutTree.clear();
  tree< shared_ptr<model::Track> >::iterator_base iterator =
    layoutTree.set_head(sequence);
  
  add_branch(iterator, sequence);
}

void
TimelineLayoutHelper::add_branch(
  lumiera::tree< shared_ptr<model::Track> >::iterator_base
    parent_iterator, 
  shared_ptr<model::Track> parent)
{
  BOOST_FOREACH(shared_ptr<model::Track> child,
    parent->get_child_tracks())
    {
      lumiera::tree< shared_ptr<model::Track> >::iterator_base
        child_iterator = 
          layoutTree.append_child(parent_iterator, child);
      add_branch(child_iterator, child);
    }
}

}   // namespace timeline
}   // namespace widgets
}   // namespace gui