Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.utils;

import java.awt.geom.Rectangle2D;

/**

 * Clase que representa un array circular de rect?ngulos

 *

 * @author Fernando Gonz?lez Cort?s

 */

public class ExtentsHistory {

    private int NUMREC;

    private Rectangle2D.Double[] extents;

    private int num = 0;

    /**

     * Creates a new ExtentsHistory object.

     */

    public ExtentsHistory() {

        NUMREC = 4;

        extents = new Rectangle2D.Double[NUMREC];

    }

    /**

     * Creates a new ExtentsHistory object.

     *

     * @param numEntries Numero de entradas que se guardan en el historico de

     *        rect?ngulos, por defecto 20

     */

    public ExtentsHistory(int numEntries) {

        NUMREC = numEntries;

    }

    /**

     * Pone un nuevo rect?ngulo al final del array

     *

     * @param ext Rect?ngulo que se a?ade al hist?rico

     */

    public void put(Rectangle2D.Double ext) {

        if ((ext != null) && ((num < 1) || (ext != extents[num - 1]))) {

            if (num < (NUMREC)) {

                extents[num] = ext;

                num = num + 1;

            } else {

                for (int i = 0; i < (NUMREC - 1); i++) {

                    extents[i] = extents[i + 1];

                }

                extents[num - 1] = ext;

            }

        }

    }

    /**

     * Devuelve true si hay alg?n rect?ngulo en el hist?rico

     *

     * @return true o false en caso de que haya o no haya rect?ngulos

     */

    public boolean hasPrevious() {

        return num > 0;

    }

    /**

     * Obtiene el ?ltimo rect?ngulo que se a?adi? al hist?rico

     *

     * @return Ultimo rect?ngulo a?adido

     */

    public Rectangle2D.Double get() {

        Rectangle2D.Double ext = extents[num - 1];

        return ext;

    }

    /**

     * Devuelve el ?ltimo rect?ngulo del hist?rico y lo elimina del mismo

     *

     * @return Ultimo rect?ngulo a?adido

     */

    public Rectangle2D.Double removePrev() {

        Rectangle2D.Double ext = extents[num - 1];

        num = num - 1;

        return ext;

    }

}

/*

   public class Extents{

           private final int NUMREC=20;

           private Rectangle2D.Double[] extents;

           private int num=0;

           public Extents(){

             extents = new Rectangle2D.Double[NUMREC];

           }

           public void put (Rectangle2D.Double ext){

           if((ext!=null)&&((num<1)||(ext!=extents[num-1]))){

            if (num<(NUMREC)){

             extents[num]=ext;

             num=num+1;

            }else{

                    for (int i=0;i<(NUMREC-1);i++){

                            extents[i]=extents[i+1];

                    }

                    extents[num-1]=ext;

            }

           }

           }

           public Rectangle2D.Double get(){

                   if(num>1){

                   Rectangle2D.Double ext = extents[num-2];

                     return ext;

                   }

             return null;

           }

           public Rectangle2D.Double getPrev(){

                           if(num>1){

                           Rectangle2D.Double ext = extents[num-2];

                           num=num-1;

                           return ext;

                           }

                     return null;

                   }

     }

 */