Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/jfree/CollisionFreeXYTextAnnotation.java @ 2157:c4ceade9d50e
Added new Annotation class that prevents collisions (to replace StickyAxisAnnotation).
flys-artifacts/trunk@3742 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
|---|---|
| date | Fri, 20 Jan 2012 13:20:37 +0000 |
| parents | |
| children | c68f4f227c09 |
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| 2156:4e0878695c5f | 2157:c4ceade9d50e |
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| 1 package de.intevation.flys.jfree; | |
| 2 | |
| 3 import org.apache.log4j.Logger; | |
| 4 | |
| 5 import java.util.Iterator; | |
| 6 | |
| 7 import java.awt.Shape; | |
| 8 import java.awt.geom.Rectangle2D; | |
| 9 import java.awt.Color; | |
| 10 import java.awt.Font; | |
| 11 import java.awt.BasicStroke; | |
| 12 | |
| 13 import org.jfree.chart.annotations.XYTextAnnotation; | |
| 14 import org.jfree.chart.axis.ValueAxis; | |
| 15 import org.jfree.chart.plot.PlotOrientation; | |
| 16 import org.jfree.chart.plot.XYPlot; | |
| 17 import org.jfree.chart.entity.XYAnnotationEntity; | |
| 18 import org.jfree.chart.plot.PlotRenderingInfo; | |
| 19 import org.jfree.chart.plot.Plot; | |
| 20 | |
| 21 import org.jfree.text.TextUtilities; | |
| 22 | |
| 23 import org.jfree.ui.RectangleEdge; | |
| 24 | |
| 25 import de.intevation.flys.utils.ThemeAccess; | |
| 26 | |
| 27 /** | |
| 28 * Custom Annotations class that is drawn only if no collisions with other | |
| 29 * already drawn CustomAnnotations in current plot are found. | |
| 30 */ | |
| 31 public class CollisionFreeXYTextAnnotation extends XYTextAnnotation { | |
| 32 | |
| 33 /** Logger for this class. */ | |
| 34 private static Logger logger = | |
| 35 Logger.getLogger(CollisionFreeXYTextAnnotation.class); | |
| 36 | |
| 37 public CollisionFreeXYTextAnnotation(String text, float x, double y) { | |
| 38 super(text, x, y); | |
| 39 } | |
| 40 | |
| 41 | |
| 42 /** | |
| 43 * Draw the Annotation only if it does not collide with other | |
| 44 * already drawn Annotations- texts. | |
| 45 * | |
| 46 * @param g2 the graphics device. | |
| 47 * @param plot the plot. | |
| 48 * @param dataArea the data area. | |
| 49 * @param domainAxis the domain axis. | |
| 50 * @param rangeAxis the range axis. | |
| 51 * @param rendererIndex the render index. | |
| 52 * @param info state information, escpecially collects info about | |
| 53 * already drawn shapes (and thus annotations), used | |
| 54 * for collision detection. | |
| 55 */ | |
| 56 @Override | |
| 57 public void draw( | |
| 58 java.awt.Graphics2D g2, | |
| 59 XYPlot plot, | |
| 60 java.awt.geom.Rectangle2D dataArea, | |
| 61 ValueAxis domainAxis, | |
| 62 ValueAxis rangeAxis, | |
| 63 int rendererIndex, | |
| 64 PlotRenderingInfo info | |
| 65 ) { | |
| 66 // From superclass, adjusted access only. | |
| 67 PlotOrientation orientation = plot.getOrientation(); | |
| 68 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation( | |
| 69 plot.getDomainAxisLocation(), orientation); | |
| 70 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation( | |
| 71 plot.getRangeAxisLocation(), orientation); | |
| 72 | |
| 73 float anchorX = (float) domainAxis.valueToJava2D( | |
| 74 this.getX(), dataArea, domainEdge); | |
| 75 float anchorY = (float) rangeAxis.valueToJava2D( | |
| 76 this.getY(), dataArea, rangeEdge); | |
| 77 | |
| 78 if (orientation == PlotOrientation.HORIZONTAL) { | |
| 79 float tempAnchor = anchorX; | |
| 80 anchorX = anchorY; | |
| 81 anchorY = tempAnchor; | |
| 82 } | |
| 83 | |
| 84 g2.setFont(getFont()); | |
| 85 Shape hotspot = TextUtilities.calculateRotatedStringBounds( | |
| 86 getText(), g2, anchorX, anchorY, getTextAnchor(), | |
| 87 getRotationAngle(), getRotationAnchor()); | |
| 88 | |
| 89 // Deviation from superclass: prevent collision. | |
| 90 Rectangle2D hotspotBox = hotspot.getBounds2D(); | |
| 91 for (Iterator i = info.getOwner().getEntityCollection().iterator(); | |
| 92 i.hasNext(); ) { | |
| 93 Object next = i.next(); | |
| 94 // Collision with other stuff than XYAnnotations are okay. | |
| 95 if (next instanceof XYAnnotationEntity) { | |
| 96 XYAnnotationEntity drawnShape = (XYAnnotationEntity) next; | |
| 97 if (drawnShape.getArea().intersects(hotspotBox)) { | |
| 98 // Found collision, early stop. | |
| 99 return; | |
| 100 } | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 if (this.getBackgroundPaint() != null) { | |
| 105 g2.setPaint(this.getBackgroundPaint()); | |
| 106 g2.fill(hotspot); | |
| 107 } | |
| 108 g2.setPaint(getPaint()); | |
| 109 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY, | |
| 110 getTextAnchor(), getRotationAngle(), getRotationAnchor()); | |
| 111 if (this.isOutlineVisible()) { | |
| 112 g2.setStroke(this.getOutlineStroke()); | |
| 113 g2.setPaint(this.getOutlinePaint()); | |
| 114 g2.draw(hotspot); | |
| 115 } | |
| 116 | |
| 117 String toolTip = getToolTipText(); | |
| 118 String url = getURL(); | |
| 119 if (toolTip != null || url != null) { | |
| 120 addEntity(info, hotspot, rendererIndex, toolTip, url); | |
| 121 } | |
| 122 else { | |
| 123 addEntity(info, hotspot, rendererIndex, | |
| 124 "CollisionFreeXYTextAnnotation", | |
| 125 "CollisionFreeXYTextAnnotation"); | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 | |
| 130 /* | |
| 131 public void applyTheme(ThemeAccess ta) { | |
| 132 lineWidth = ta.parseLineWidth(); | |
| 133 lineColor = ta.parseLineColorField(); | |
| 134 textColor = ta.parseTextColor(); | |
| 135 font = ta.parseTextFont(); | |
| 136 textOrientation = ta.parseTextOrientation(); | |
| 137 textBackground = ta.parseTextBackground(); | |
| 138 showBackground = ta.parseShowTextBackground(); | |
| 139 } | |
| 140 */ | |
| 141 } | |
| 142 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |