/***************************************************************************
                          pointlistcomponent.h  -  K Desktop Planetarium
                             -------------------
    begin                : 2005/10/01
    copyright            : (C) 2005 by Jason Harris
    email                : kstars@30doradus.org
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef POINTLISTCOMPONENT_H
#define POINTLISTCOMPONENT_H

#define NCIRCLE 360   //number of points used to define equator, ecliptic and horizon

#include <QList>

#include "skycomponent.h"

class SkyPoint;

/**
 *@class PointListComponent
 *An abstract parent class, to be inherited by SkyComponents that store a QList
 *of SkyPoints.
 *
 *@author Jason Harris
 *@version 0.1
 */
class PointListComponent : public SkyComponent
{
public:

    PointListComponent( SkyComponent *parent );

    virtual ~PointListComponent();

    /**Draw the list of objects on the SkyMap*/
    virtual void draw( QPainter& /*psky*/ ) {}

    /**Draw the object, if it is exportable to an image
    *@see isExportable()
    */
    void drawExportable( QPainter& psky );

    /**
    	*@short Update the sky positions of this component.
    	*
    	*This function usually just updates the Horizontal (Azimuth/Altitude)
    	*coordinates of the objects in this component.  However, the precession
    	*and nutation must also be recomputed periodically.  Requests to do
    	*so are sent through the doPrecess parameter.
    	*@p num Pointer to the KSNumbers object
    	*@note By default, the num parameter is NULL, indicating that 
    	*Precession/Nutation computation should be skipped; this computation 
    	*is only occasionally required.
    	*/
    virtual void update( KSNumbers *num=0 );

    QList<SkyPoint*>& pointList() { return m_PointList; }

private:
    SkyComponent *Parent;
    QList<SkyPoint*> m_PointList;
};

#endif
