annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java @ 3630:28be160b5870

Add a module service. It's now possible to configure the modules which are available for a client. With the selected attribute it is possible to give a hint for the client which module should be pre selected by default flys-artifacts/trunk@5330 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Bjoern Ricks <bjoern.ricks@intevation.de>
date Fri, 31 Aug 2012 13:17:16 +0000
parents 63ef889eea2b
children d8f2ab5b61c3
rev   line source
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1 package de.intevation.flys.jfree;
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2
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3 import de.intevation.flys.artifacts.math.Function;
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4
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5 import java.awt.Shape;
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6
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7 import java.awt.geom.Rectangle2D;
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8
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9 import java.util.Iterator;
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10
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11 import org.jfree.chart.entity.ChartEntity;
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12 import org.jfree.chart.entity.EntityCollection;
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13
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14 import org.w3c.dom.Document;
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15
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16 public class JFreeUtil {
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17
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18 /** Do not instantiate. */
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19 private JFreeUtil() {
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20 }
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21
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22
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23 /**
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24 * True if \param hotspot collides with a Entity in \param entities.
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25 * @param hotspot Shape to compare against other shapes (bounds only).
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26 * @param entities entities against which to compare shape.
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27 * @param exclusiveEntityClass If not null, consider only entities of
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28 * given class.
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29 * @return true if a collision (non-zero intersection) exists between
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30 * shapes.
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31 */
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32 public static boolean collides(Shape hotspot, EntityCollection entities,
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33 Class exclusiveEntityClass) {
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34 if (entities == null) return false;
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35
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36 Rectangle2D hotspotBox = hotspot.getBounds2D();
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37
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38 for (Iterator i = entities.iterator(); i.hasNext(); ) {
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39 Object next = i.next();
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40 ChartEntity entity = (ChartEntity) next;
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41 if (exclusiveEntityClass == null
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42 || exclusiveEntityClass.isInstance(entity))
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43 {
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44 if (entity.getArea().intersects(hotspotBox)) {
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45 // Found collision, early stop.
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46 return true;
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47 }
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48 }
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49 }
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50
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51 return false;
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52 }
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53
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54
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55 public static StyledXYSeries sampleFunction2D(
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56 Function func,
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57 Document theme,
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58 String seriesKey,
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59 int samples,
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60 double start,
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61 double end
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62 ) {
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63 StyledXYSeries series = new StyledXYSeries(seriesKey, theme);
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64
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65 double step = (end - start) / (samples - 1);
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66
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67 for (int i = 0; i < samples; i++) {
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68 double x = start + (step * i);
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69 series.add(x, func.value(x));
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70 }
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71
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72 return series;
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73 }
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74 }
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75 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

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