GElement.h

/***************************************************************************
 *   Copyright (C) 2003-2004 by Raphael Langerhorst                        *
 *   raphael-langerhorst@gmx.at                                            *
 *                                                                         *
 *   Permission is hereby granted, free of charge, to any person obtaining *
 *   a copy of this software and associated documentation files (the       *
 *   "Software"), to deal in the Software without restriction, including   *
 *   without limitation the rights to use, copy, modify, merge, publish,   *
 *   distribute, sublicense, and/or sell copies of the Software, and to    *
 *   permit persons to whom the Software is furnished to do so, subject to *
 *   the following conditions:                                             *
 *                                                                         *
 *   The above copyright notice and this permission notice shall be        *
 *   included in all copies or substantial portions of the Software.       *
 *                                                                         *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       *
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 *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*
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#ifndef GELEMENTH
#define GELEMENTH

#include <qdatastream.h>
#include <qdatetime.h>
#include <qobject.h>
#include <qptrlist.h>

namespace GCS
{

class GObject;
class GEnergy;
class GForm;
class GElementID;
class GElementListener;
class GElementInfluence;
class GAgent;

class GElement : public QObject
{
  //defines GElement to be a Q_OBJECT;
  //this means that the signal and slot mechanism provided by Qt
  //can be used;
  Q_OBJECT

  private:

    GObject* Object;

    QPtrList<GAgent> Agents;
    
    QDateTime ParkTime;

  public:

    GElement(GObject* object);

    virtual ~GElement();

    const GElementID& getElementID() const;

    bool isParked();
    
    const QPtrList<GAgent>& getAgents() const;
    
    const GObject* getObject() const;
    
  protected slots:
  
     void parentChangedInternal(const GCS::GElementID& oldParent, const GCS::GElementID& newParent);

  public slots:

    void receiveInfluence(GCS::GElementInfluence&);

    void addAgent(GCS::GAgent* agent);
    
    void removeAgent(GCS::GAgent* agent, bool del=FALSE);

  signals:  // signals used inside the element
  
    void park();

    void execute(double seconds_elapsed);

    void forwardInfluenceInternal(GCS::GElementInfluence&);
    
  public: //these two methods are necessary to raise internal signals;
    
    void parkElement();
    
    void executeElement(double seconds_delta_t_offset = 0);
    
  signals:  // signals related to influence
    
    void sendInfluence(const GCS::GElementID& destination,
                       GCS::GElementInfluence& influence);
                       
    void radiateInfluence(GCS::GElementInfluence& influence);

  signals:  // signals used for border communication (GWE)

    //signals from GAgent  
  
    void parentChanged(GCS::GElement* element, const GCS::GElementID& oldParent, const GCS::GElementID& newParent);
    
    void energyChanged(const GCS::GEnergy& changedEnergy);

    void formChanged(const GCS::GForm& changedForm);

    void agentChanged(const GCS::GAgent& changedAgent);
    
    void childElementCreated(GCS::GElement* newElement);
    
    void childElementRemoved(const GCS::GElementID& childID);
};

}

#endif

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