root / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / ExtentHistory.java @ 213
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/* Generated by Together */
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package com.iver.cit.gvsig.fmap; |
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import java.awt.geom.Rectangle2D; |
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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 = 4;
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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.Double ext) { |
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if ((ext != null) && ((num < 1) || (ext != extents[num - 1]))) { |
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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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} |