node.h

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/*
 *  GXML/Graphite: Geometry and Graphics Programming Library + Utilities
 *  Copyright (C) 2000 Bruno Levy
 *
 *  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.
 *
 *  If you modify this software, you should include a notice giving the
 *  name of the person performing the modification, the date of modification,
 *  and the reason for such modification.
 *
 *  Contact: Bruno Levy
 *
 *     levy@loria.fr
 *
 *     ISA Project
 *     LORIA, INRIA Lorraine, 
 *     Campus Scientifique, BP 239
 *     54506 VANDOEUVRE LES NANCY CEDEX 
 *     FRANCE
 *
 *  Note that the GNU General Public License does not permit incorporating
 *  the Software into proprietary programs. 
 */
 
 
#ifndef H_OGF_GOM_TYPES_NODE_H
#define H_OGF_GOM_TYPES_NODE_H
 
#include <OGF/gom/common/common.h>
#include <OGF/gom/types/object.h>
 
namespace OGF {
 
//_________________________________________________________
 
    gom_class GOM_API Node : public Object {
    public:
        
        explicit Node(Node* parent = nullptr) ;
 
        virtual ~Node() ;
 
        virtual void add_child(Node* child) ;
 
        virtual void remove_child(Node* child) ;
 
    gom_slots:
        Node* ith_child(index_t i) const { 
            ogf_assert(i < get_nb_children()) ;
            return children_[i] ; 
        }
 
    gom_properties:
        size_t get_nb_children() const {
            return children_.size();
        }
 
        Node* get_parent() const {
            return parent_;
        }
 
    protected:
        void swap_children(Node* n1, Node* n2) {
            index_t i = NO_INDEX;
            index_t j = NO_INDEX;
            for(index_t k=0; k<children_.size(); ++k) {
                if(children_[k] == n1) {
                    i = k;
                }
                if(children_[k] == n2) {
                    j = k;
                }
            }
            geo_assert(i != NO_INDEX && j != NO_INDEX);
            std::swap(children_[i], children_[j]);
        }
        
    private:
        std::vector< SmartPointer<Node> > children_ ;
        Node* parent_ ;
    } ;
 
    typedef SmartPointer<Node> Node_var ;
 
//_________________________________________________________
 
}
#endif