Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java @ 3018:fb07f936b5ad

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New helper. flys-artifacts/trunk@4584 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Tue, 05 Jun 2012 13:28:11 +0000
parents
children e19ff9086035
rev   line source
3018
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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1 package de.intevation.flys.jfree;
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2
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3 import java.awt.Shape;
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4 import java.awt.geom.Rectangle2D;
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5
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6 import java.util.Iterator;
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7
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8 import org.jfree.chart.entity.ChartEntity;
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9 import org.jfree.chart.entity.EntityCollection;
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10
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11 public class JFreeUtil {
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12
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13 /** Do not instantiate. */
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14 private JFreeUtil() {
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15 }
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16
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17
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18 /**
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19 * True if \param hotspot collides with a Entity in \param entities.
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20 * @param hotspot Shape to compare against other shapes (bounds only).
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21 * @param entities entities against which to compare shape.
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22 * @param true if a collision (non-zero intersection) exists between
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23 * shapes.
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24 */
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25 public static boolean collides(Shape hotspot, EntityCollection entities) {
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26 if (entities == null) return false;
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27
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28 Rectangle2D hotspotBox = hotspot.getBounds2D();
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29
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30 for (Iterator i = entities.iterator(); i.hasNext(); ) {
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31 Object next = i.next();
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32 ChartEntity entity = (ChartEntity) next;
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33 if (entity.getArea().intersects(hotspotBox)) {
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34 // Found collision, early stop.
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35 return true;
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36 }
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37 }
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38
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39 return false;
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40 }
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41 }
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