root / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / ExtentHistory.java @ 1034
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package com.iver.cit.gvsig.fmap; |
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import com.iver.utiles.XMLEntity; |
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import java.awt.Rectangle; |
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import java.awt.geom.Rectangle2D; |
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/**
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* Clase que gestiona los diferentes extent por los que ha pasado la vista.
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*
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* @author Vicente Caballero Navarro
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*/
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public class ExtentHistory { |
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private int NUMREC; |
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private Rectangle2D[] extents; |
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private int num = 0; |
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/**
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* Creates a new ExtentsHistory object.
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*/
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public ExtentHistory() {
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NUMREC = 10;
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extents = new Rectangle2D.Double[NUMREC]; |
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} |
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/**
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* Creates a new ExtentsHistory object.
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*
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* @param numEntries Numero de entradas que se guardan en el historico de
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* rect?ngulos, por defecto 20
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*/
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public ExtentHistory(int numEntries) { |
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NUMREC = numEntries; |
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} |
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/**
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* Pone un nuevo rect?ngulo al final del array
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*
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* @param ext Rect?ngulo que se a?ade al hist?rico
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*/
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public void put(Rectangle2D ext) { |
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if ((ext != null) && ((num < 1) || (ext != extents[num - 1]))) { |
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if (ext instanceof Rectangle) { |
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//Esto solo hace falta cuando se pasa como par?metro el fullextent del DGN.
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ext = new Rectangle2D.Double(ext.getX(), ext.getY(), |
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ext.getWidth(), ext.getHeight()); |
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} |
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if (num < (NUMREC)) {
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extents[num] = ext; |
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num = num + 1;
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} else {
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for (int i = 0; i < (NUMREC - 1); i++) { |
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extents[i] = extents[i + 1];
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} |
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extents[num - 1] = ext;
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} |
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} |
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} |
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/**
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* Devuelve true si hay alg?n rect?ngulo en el hist?rico
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*
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* @return true o false en caso de que haya o no haya rect?ngulos
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*/
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public boolean hasPrevious() { |
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return num > 0; |
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} |
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/**
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* Obtiene el ?ltimo rect?ngulo que se a?adi? al hist?rico
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*
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* @return Ultimo rect?ngulo a?adido
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*/
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public Rectangle2D get() { |
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Rectangle2D ext = extents[num - 1]; |
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return ext;
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} |
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/**
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* Devuelve el ?ltimo rect?ngulo del hist?rico y lo elimina del mismo
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*
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* @return Ultimo rect?ngulo a?adido
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*/
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public Rectangle2D removePrev() { |
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Rectangle2D ext = extents[num - 1]; |
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num = num - 1;
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return ext;
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} |
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/**
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* Devuelve el XMLEntity con la informaci?n para poder reproducir de nuevo
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* el objeto actual.
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*
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* @return XMLEntity.
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*/
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public XMLEntity getXMLEntity() {
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XMLEntity xml = new XMLEntity();
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xml.putProperty("num", num);
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xml.putProperty("numrec", NUMREC);
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for (int i = 0; i < NUMREC; i++) { |
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if (extents[i] != null) { |
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xml.putProperty("extent" + i + "X", extents[i].getX()); |
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xml.putProperty("extent" + i + "Y", extents[i].getY()); |
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xml.putProperty("extent" + i + "W", extents[i].getWidth()); |
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xml.putProperty("extent" + i + "H", extents[i].getHeight()); |
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} |
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} |
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return xml;
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} |
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/**
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* Crea un nuevo ExtentHistory a partir del XMLEntity.
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*
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* @param xml XMLEntity
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*
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* @return Nuevo ExtentHistory.
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*/
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public static ExtentHistory createFromXML(XMLEntity xml) { |
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ExtentHistory eh = new ExtentHistory();
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eh.num = xml.getIntProperty("num");
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eh.NUMREC = xml.getIntProperty("numrec");
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for (int i = 0; i < eh.NUMREC; i++) { |
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try {
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eh.extents[i] = new Rectangle2D.Double(xml.getDoubleProperty( |
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"extent" + i + "X"), |
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xml.getDoubleProperty("extent" + i + "Y"), |
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xml.getDoubleProperty("extent" + i + "W"), |
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xml.getDoubleProperty("extent" + i + "H")); |
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} catch (Exception e) { |
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System.out.println("En las ExtentHistory =" + e); //TODO o se captura de alguna forma o se mete un nuevo parametro en el xml para saber exactamente cuantos rect?gulos se han a?adido. |
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} |
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} |
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return eh;
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} |
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} |