include/embite/ElementOwner.h

/*
    Copyright 2008 Nikola Tassev 
    This file is part of Embite.

    Embite is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Embite 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 for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with Embite.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __embite_ElementOwner_h
#define __embite_ElementOwner_h

#include <list>

namespace embite
{

class Element;

class ElementOwner
{
public:
    ~ElementOwner();

    ElementOwner();
    
protected:
    ElementOwner(ElementOwner* owner);

    ElementOwner* getOwner(const ElementOwner* outerOwner = NULL) const
    {
        return const_cast<ElementOwner*>((outerOwner != NULL) ? outerOwner : ((m_owner != NULL) ? m_owner : this));
    }

    void addElement(Element* element);

private:
    ElementOwner*           m_owner;

    typedef std::list<Element*> TOwnedList;
    TOwnedList              m_objects; 
};

} // namespace embite

#endif // __embite_ElementOwner_h

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