Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java @ 3468:f37e7e8907cb
merged flys-artifacts/2.8.1
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:39 +0200 |
| parents | 63ef889eea2b |
| children | d8f2ab5b61c3 |
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| 3387:5ffad8bde8ad | 3468:f37e7e8907cb |
|---|---|
| 1 package de.intevation.flys.jfree; | |
| 2 | |
| 3 import de.intevation.flys.artifacts.math.Function; | |
| 4 | |
| 5 import java.awt.Shape; | |
| 6 | |
| 7 import java.awt.geom.Rectangle2D; | |
| 8 | |
| 9 import java.util.Iterator; | |
| 10 | |
| 11 import org.jfree.chart.entity.ChartEntity; | |
| 12 import org.jfree.chart.entity.EntityCollection; | |
| 13 | |
| 14 import org.w3c.dom.Document; | |
| 15 | |
| 16 public class JFreeUtil { | |
| 17 | |
| 18 /** Do not instantiate. */ | |
| 19 private JFreeUtil() { | |
| 20 } | |
| 21 | |
| 22 | |
| 23 /** | |
| 24 * True if \param hotspot collides with a Entity in \param entities. | |
| 25 * @param hotspot Shape to compare against other shapes (bounds only). | |
| 26 * @param entities entities against which to compare shape. | |
| 27 * @param exclusiveEntityClass If not null, consider only entities of | |
| 28 * given class. | |
| 29 * @return true if a collision (non-zero intersection) exists between | |
| 30 * shapes. | |
| 31 */ | |
| 32 public static boolean collides(Shape hotspot, EntityCollection entities, | |
| 33 Class exclusiveEntityClass) { | |
| 34 if (entities == null) return false; | |
| 35 | |
| 36 Rectangle2D hotspotBox = hotspot.getBounds2D(); | |
| 37 | |
| 38 for (Iterator i = entities.iterator(); i.hasNext(); ) { | |
| 39 Object next = i.next(); | |
| 40 ChartEntity entity = (ChartEntity) next; | |
| 41 if (exclusiveEntityClass == null | |
| 42 || exclusiveEntityClass.isInstance(entity)) | |
| 43 { | |
| 44 if (entity.getArea().intersects(hotspotBox)) { | |
| 45 // Found collision, early stop. | |
| 46 return true; | |
| 47 } | |
| 48 } | |
| 49 } | |
| 50 | |
| 51 return false; | |
| 52 } | |
| 53 | |
| 54 | |
| 55 public static StyledXYSeries sampleFunction2D( | |
| 56 Function func, | |
| 57 Document theme, | |
| 58 String seriesKey, | |
| 59 int samples, | |
| 60 double start, | |
| 61 double end | |
| 62 ) { | |
| 63 StyledXYSeries series = new StyledXYSeries(seriesKey, theme); | |
| 64 | |
| 65 double step = (end - start) / (samples - 1); | |
| 66 | |
| 67 for (int i = 0; i < samples; i++) { | |
| 68 double x = start + (step * i); | |
| 69 series.add(x, func.value(x)); | |
| 70 } | |
| 71 | |
| 72 return series; | |
| 73 } | |
| 74 } | |
| 75 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |