GlComposite.h

/*
 *
 * This file is part of Tulip (www.tulip-software.org)
 *
 * Authors: David Auber and the Tulip development Team
 * from LaBRI, University of Bordeaux
 *
 * Tulip 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.
 *
 * Tulip 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.
 *
 */

#ifndef COMPOSITE_H
#define COMPOSITE_H

#include <map>
#include <list>
#include <string>

#include <tulip/GlSimpleEntity.h>
#include <tulip/tulipconf.h>

namespace tlp {

/**
 * @ingroup OpenGL
 * \brief GlSimpleEntity used to agregate other GlEntity
 *
 * This class provide basic container to manage other GlEntity
 * @see GlSimpleEntity
 */
class TLP_GL_SCOPE GlComposite : public GlSimpleEntity {


public:

  /**
   * @brief Constructor
   * @param deleteComponentsInDestructor if true : call delete on components when the GlComposite is delete
   */
  GlComposite(bool deleteComponentsInDestructor=true);

  /**
   * @brief Destructor
   */
  ~GlComposite();

  /**
   * @brief Clear the composite
   *
   * If deleteElems is true, composite's entities are delete
   */
  void reset(bool deleteElems);
  /**
   * @brief Add new entity with name : key.
   *
   * The composite does not takes the entity's ownership, i.e. it is not its responsibility to delete it.
   */
  void addGlEntity(GlSimpleEntity *entity, const std::string &key);
  /**
   * @brief Remove entity with name : key
   *
   * The entity is not deleted
   */
  void deleteGlEntity(const std::string &key,bool informTheEntity=true);
  /**
   * @brief Remove given entity
   *
   * The entity is not deleted
   */
  void deleteGlEntity(GlSimpleEntity *entity,bool informTheEntity=true);
  /**
   * @brief Find name of given entity
   */
  std::string findKey(GlSimpleEntity *entity);
  /**
   * @brief Find entity with name : key
   */
  GlSimpleEntity* findGlEntity(const std::string &key);
  /**
   * @brief Return map of entities in composite
   */
  const std::map<std::string, GlSimpleEntity*> &
  getGlEntities () const {
    return elements;
  }

  /**
   * @brief Set stencil number for all composite's children
   *
   * For more information on stencil  :
   * @see GlSimpleEntity
   */
  virtual void setStencil(int stencil) {
    this->stencil=stencil;

    for(std::list<GlSimpleEntity*>::iterator it=_sortedElements.begin(); it!=_sortedElements.end(); ++it) {
      (*it)->setStencil(stencil);
    }
  }

  /**
   * @brief Set if at the destruction of composite, components well be deleted
   */
  void setDeleteComponentsInDestructor(bool deleteComponentsInDestructor) {
    this->deleteComponentsInDestructor=deleteComponentsInDestructor;
  }

  /**
   * @brief translate the composite with children
   */
  virtual void translate(const Coord &mouvement);

  /**
   * @brief Function to export data in outString (in XML format)
   */
  virtual void getXML(std::string &outString);

  /**
   * @brief Function to set data with inString (in XML format)
   */
  virtual void setWithXML(const std::string &inString, unsigned int &currentPosition);

///@cond DOXYGEN_HIDDEN

  /**
   * Function used to visit composite's children
   */
  virtual void acceptVisitor(GlSceneVisitor *visitor) {
    //visitor->visit(this);
    for(std::list<GlSimpleEntity*>::iterator it=_sortedElements.begin(); it!=_sortedElements.end(); ++it) {
      if((*it)->isVisible()) {

#ifndef NDEBUG
        GlComposite *composite=dynamic_cast<GlComposite*>(*it);

        if(!composite && !(*it)->getBoundingBox().isValid()) {
          for(std::map<std::string, GlSimpleEntity*>::iterator itE=elements.begin(); itE!=elements.end(); ++itE) {
            if(itE->second==(*it)) {
              tlp::warning() << "Invalid bounding box for entity: " << itE->first << std::endl;
              assert(false);
            }
          }
        }

#endif

        (*it)->acceptVisitor(visitor);
      }
    }
  }

  /**
   * Add a layer parent to this entity
   */
  virtual void addLayerParent(GlLayer *layer);

  /**
   * Remove a layer parent to this entity
   */
  virtual void removeLayerParent(GlLayer *layer);

  /**
   * Call when a child of the composite is modified
   */
  void notifyModified(GlSimpleEntity *entity);

  /**
   * \attention This function do nothing, GlComposite is a GlSimpleEntity so draw function must be define
   */
  virtual void draw(float,Camera *) {}

///@endcond

protected:

  std::map<std::string, GlSimpleEntity*> elements;
  std::list<GlSimpleEntity *> _sortedElements; //necessary to enable ordering of elements (for alpha blending)
  std::vector<GlLayer *> layerParents;
  bool deleteComponentsInDestructor;
};

}
#endif