/**
**
** @RDE_HEADER@
** Node visitor for GeometryModel.
** $Id$
** $HeadURL$
** $Author$
**
** -----------------------------------------------------------------------------------------------
**
** Hardware-Environment: Intel-PC
** Software-Environment: Windows 7, Qt 5.4. ArcGIS 10.2.5
**
** Language ........: C++ 11
**
** -----------------------------------------------------------------------------------------------
**
** Author ...........: Jörg Turla, SPD G, Tel. 3132
**
** -----------------------------------------------------------------------------------------------
**
** Notes .........:
**
**   07.07.2016, JT  : First edition for use with Qt5
**
** -----------------------------------------------------------------------------------------------
*/

#pragma once

#include "geometry_model.h"

namespace SituationMap
{

/**
  GeometryNopdeVisitor implements visitor pattern to traverse geoemtry model tree. The apply function will be
  called for each node in geometry model.
*/
class GEOMETRYMODEL_EXPORT GeometryNodeVisitor
{
public:

  explicit GeometryNodeVisitor(GeometryModel *geoModel);
  virtual ~GeometryNodeVisitor() = default;
  GeometryNodeVisitor(const GeometryNodeVisitor &)              = delete;

  /**
    Traversing the complete geometry model
  */
  bool traverse();

  /**
    Traversing the sub-tree of node. Coming in deepth first.
  */
  bool traverse(GeometryModel::Node node);

protected:

  /**
    For each node the apply function will be called. If apply returns false the traversal is aborted. In
    other case if return value is true the traversel is continued.

    @param geoModel  Pointer to geometry model
    @param node      Node of geometry model
    @param nodeType  Type of node
    @return          false to abort traversael otherwise true
  */
  virtual bool apply(GeometryModel *geoModel, const GeometryModel::Node &node, GeometryModel::PrimitiveType nodeType) = 0;

  GeometryModel *m_geometryModel;

}; // GeometryNodeVisitor

} // namespace SituationMap