reference.h

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/***************************************************************************
 *   Copyright (C) 2007 by Rick L. Vinyard, Jr.                            *
 *   rvinyard@cs.nmsu.edu                                                  *
 *                                                                         *
 *   This file is part of the papyrus library.                             *
 *                                                                         *
 *   papyrus is free software; you can redistribute it and/or modify       *
 *   it under the terms of the GNU Lesser General Public License           *
 *   version 3.0 as published by the Free Software Foundation.             *
 *                                                                         *
 *   papyrus 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 Lesser General Public License version 3.0 for more details.       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with the papyrus library. If not, see                   *
 *   <http://www.gnu.org/licenses/>.                                       *
 ***************************************************************************/
#ifndef PAPYRUSREFERENCE_H
#define PAPYRUSREFERENCE_H

#include <papyrus/drawable.h>

namespace Papyrus
{

  class Reference : public Drawable
  {
    protected:
      Reference ( const Glib::ustring& id, Drawable::pointer ref );

    public:
      PAPYRUS_DRAWABLE(Reference);

      static pointer create ( Drawable::pointer ref = Drawable::pointer() );

      static pointer create ( const Glib::ustring& id, Drawable::pointer ref = Drawable::pointer() );

      ~Reference();

      virtual void draw ( Context& cairo ) const;

      Drawable::pointer referenced();

      void set_referenced ( Drawable::pointer d );
      
      void clear_referenced( );

      virtual Matrix global_matrix() const;

      virtual Glib::ustring svg(unsigned depth=0);

    protected:
      Drawable::pointer m_referenced;
      
      virtual Matrix calculate_composed_matrix() const;
      
      virtual Region calculate_extents(const Matrix& m = Matrix::Identity, ExtentsPerformance ep = EXTENTS_QUICK) const;

      sigc::connection m_connection_referenced_composed_matrix_invalidated;

  };

}

#endif