/*
  TIMELINE.hpp  -  independent top-level element of the Session
 
  Copyright (C)         Lumiera.org
    2009,               Hermann Vosseler <Ichthyostega@web.de>
 
  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.
 
*/


/** @file timeline.hpp
 ** Top level structural element within the session.
 ** Each Lumiera session may contain multiple top level timeline containers,
 ** which at the same time act as structural asset and as part of the public
 ** session API exposed to clients for discovering the session contents.
 ** Actually, Timelines are facade objects, delegating the implementation to
 ** the BindingMO, the Axis and the Sequences/Tracks. 
 ** 
 ** Contrary to usual habits in video/sound editing software, in Lumiera the
 ** tracks are \em not part of the timeline, but rather attached directly to
 ** the sequence container. To be usable, a timeline needs a binding to refer
 ** to such a sequence, but this sequence may be bound into multiple timelines
 ** or even virtual clips simultaneously. 
 ** 
 ** Like every structural asset, the creation of timelines happens automatically
 ** on referral; Timelines can be queried from the StructFactory, providing additional
 ** requested capabilities. Commonly clients will retrieve a given timeline by query
 ** on the name-ID of the timeline: \c Struct::create(Query<Timeline> ("id(theName)."))
 ** Additionally, the binding to a specific sequence may be established alongside:
 ** \c "timeline(theTimelineName),bindSequence(theTimelineName,sequenceID)." 
 ** 
 ** @see Session
 ** @see Sequence
 ** @see StructFactory
 **
 */


#ifndef ASSET_TIMELINE_H
#define ASSET_TIMELINE_H

#include "proc/asset/struct.hpp"
//#include "proc/mobject/mobject.hpp"
//#include "proc/mobject/placement.hpp"
#include "proc/mobject/mobject-ref.hpp"
//#include "proc/mobject/session/binding.hpp"         ////TODO avoidable??


//#include <vector>
//#include <string>

//using std::vector;
//using std::string;

namespace mobject {
namespace session {
  
  class Binding;
}}


namespace asset {
  
  typedef mobject::MORef<mobject::session::Binding> RBinding;   ////TODO why defining this into namespace asset? shouldn't it go into mobject::session ??
  
  
  /**
   * TODO type comment
   */
  class Timeline
    : public Struct
    {
        
    public:
      void detach() { TODO("Timeline-Session registration"); }
      
    protected:
      Timeline (const Asset::Ident& idi);
      friend class StructFactoryImpl;
    };
    
  
  typedef P<Timeline> PTimeline;
  
  
///////////////////////////TODO currently just fleshing the API
  
  
} // namespace asset
#endif