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comparison flys-artifacts/src/main/java/de/intevation/flys/jfree/CollisionFreeXYTextAnnotation.java @ 3818:dc18457b1cef

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merged flys-artifacts/pre2.7-2012-03-16
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:59 +0200
parents 0b8c04c7f762
children e19ff9086035
comparison
equal deleted inserted replaced
2456:60ab1054069d 3818:dc18457b1cef
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
10 import org.jfree.chart.entity.EntityCollection;
11 import org.jfree.chart.annotations.XYTextAnnotation;
12 import org.jfree.chart.axis.ValueAxis;
13 import org.jfree.chart.plot.PlotOrientation;
14 import org.jfree.chart.plot.XYPlot;
15 import org.jfree.chart.entity.XYAnnotationEntity;
16 import org.jfree.chart.plot.PlotRenderingInfo;
17 import org.jfree.chart.plot.Plot;
18
19 import org.jfree.text.TextUtilities;
20
21 import org.jfree.ui.RectangleEdge;
22
23
24 /**
25 * Custom Annotations class that is drawn only if no collisions with other
26 * already drawn CustomAnnotations in current plot are found.
27 */
28 public class CollisionFreeXYTextAnnotation extends XYTextAnnotation {
29
30 /** Logger for this class. */
31 private static Logger logger =
32 Logger.getLogger(CollisionFreeXYTextAnnotation.class);
33
34
35 public CollisionFreeXYTextAnnotation(String text, double x, double y) {
36 super(text, x, y);
37 }
38
39
40 /**
41 * Draw the Annotation only if it does not collide with other
42 * already drawn Annotations- texts.
43 *
44 * @param g2 the graphics device.
45 * @param plot the plot.
46 * @param dataArea the data area.
47 * @param domainAxis the domain axis.
48 * @param rangeAxis the range axis.
49 * @param rendererIndex the render index.
50 * @param info state information, escpecially collects info about
51 * already drawn shapes (and thus annotations), used
52 * for collision detection.
53 */
54 @Override
55 public void draw(
56 java.awt.Graphics2D g2,
57 XYPlot plot,
58 java.awt.geom.Rectangle2D dataArea,
59 ValueAxis domainAxis,
60 ValueAxis rangeAxis,
61 int rendererIndex,
62 PlotRenderingInfo info
63 ) {
64 // From superclass, adjusted access only.
65 PlotOrientation orientation = plot.getOrientation();
66 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
67 plot.getDomainAxisLocation(), orientation);
68 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
69 plot.getRangeAxisLocation(), orientation);
70
71 float anchorX = (float) domainAxis.valueToJava2D(
72 this.getX(), dataArea, domainEdge);
73 float anchorY = (float) rangeAxis.valueToJava2D(
74 this.getY(), dataArea, rangeEdge);
75
76 if (orientation == PlotOrientation.HORIZONTAL) {
77 float tempAnchor = anchorX;
78 anchorX = anchorY;
79 anchorY = tempAnchor;
80 }
81
82 g2.setFont(getFont());
83 Shape hotspot = TextUtilities.calculateRotatedStringBounds(
84 getText(), g2, anchorX, anchorY, getTextAnchor(),
85 getRotationAngle(), getRotationAnchor());
86
87 // Deviation from superclass: prevent collision.
88 Rectangle2D hotspotBox = hotspot.getBounds2D();
89
90 for (Iterator i = info.getOwner().getEntityCollection().iterator();
91 i.hasNext(); ) {
92 Object next = i.next();
93 // Collision with other stuff than XYAnnotations are okay.
94 if (next instanceof CollisionFreeXYTextAnnotationEntity) {
95 XYAnnotationEntity drawnShape = (XYAnnotationEntity) next;
96 if (drawnShape.getArea().intersects(hotspotBox)) {
97 // Found collision, early stop.
98 return;
99 }
100 }
101 }
102
103 if (this.getBackgroundPaint() != null) {
104 g2.setPaint(this.getBackgroundPaint());
105 g2.fill(hotspot);
106 }
107 g2.setPaint(getPaint());
108 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
109 getTextAnchor(), getRotationAngle(), getRotationAnchor());
110 if (this.isOutlineVisible()) {
111 g2.setStroke(this.getOutlineStroke());
112 g2.setPaint(this.getOutlinePaint());
113 g2.draw(hotspot);
114 }
115
116 //String toolTip = getToolTipText();
117 //String url = getURL();
118 String toolTip = "CollisionFreeXYTextAnnotation";
119 String url = toolTip;
120
121 if (toolTip != null || url != null) {
122 addEntity(info, hotspot, rendererIndex, toolTip, url);
123 }
124 else {
125 addEntity(info, hotspot, rendererIndex,
126 "CollisionFreeXYTextAnnotation",
127 "CollisionFreeXYTextAnnotation");
128 }
129 }
130
131 /**
132 * A utility method for adding an {@link CollisionFreeXYAnnotationEntity} to
133 * a {@link PlotRenderingInfo} instance.
134 *
135 * @param info the plot rendering info (<code>null</code> permitted).
136 * @param hotspot the hotspot area.
137 * @param rendererIndex the renderer index.
138 * @param toolTipText the tool tip text.
139 * @param urlText the URL text.
140 */
141 protected void addEntity(PlotRenderingInfo info,
142 Shape hotspot, int rendererIndex,
143 String toolTipText, String urlText) {
144 if (info == null) {
145 return;
146 }
147 EntityCollection entities = info.getOwner().getEntityCollection();
148 if (entities == null) {
149 return;
150 }
151 CollisionFreeXYTextAnnotationEntity entity =
152 new CollisionFreeXYTextAnnotationEntity(hotspot,
153 rendererIndex, toolTipText, urlText);
154 entities.add(entity);
155 }
156 }
157 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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