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comparison flys-artifacts/src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java @ 1036:e6aff80b59ff

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Added proof-of-concept collision detection for text annotations. flys-artifacts/trunk@2497 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 17 Aug 2011 09:16:20 +0000
parents 9f69a5f0af98
children 75cf1b11c97e
comparison
equal deleted inserted replaced
1035:9f69a5f0af98 1036:e6aff80b59ff
1 package de.intevation.flys.exports; 1 package de.intevation.flys.exports;
2 2
3 import java.util.ArrayList; 3 import java.util.ArrayList;
4 import java.util.Iterator;
4 import java.util.List; 5 import java.util.List;
5 6
6 import org.apache.log4j.Logger; 7 import org.apache.log4j.Logger;
8
9 import java.awt.Shape;
10 import java.awt.geom.Rectangle2D;
7 11
8 import org.jfree.chart.annotations.XYLineAnnotation; 12 import org.jfree.chart.annotations.XYLineAnnotation;
9 import org.jfree.chart.annotations.XYTextAnnotation; 13 import org.jfree.chart.annotations.XYTextAnnotation;
10 import org.jfree.chart.JFreeChart; 14 import org.jfree.chart.JFreeChart;
11 import org.jfree.chart.axis.NumberAxis; 15 import org.jfree.chart.axis.NumberAxis;
14 import org.jfree.chart.title.TextTitle; 18 import org.jfree.chart.title.TextTitle;
15 import org.jfree.data.Range; 19 import org.jfree.data.Range;
16 import org.jfree.data.xy.XYSeries; 20 import org.jfree.data.xy.XYSeries;
17 import org.jfree.ui.TextAnchor; 21 import org.jfree.ui.TextAnchor;
18 import org.jfree.chart.plot.PlotRenderingInfo; 22 import org.jfree.chart.plot.PlotRenderingInfo;
23 import org.jfree.text.TextUtilities;
24 import org.jfree.chart.entity.XYAnnotationEntity;
25 import org.jfree.chart.plot.PlotOrientation;
26 import org.jfree.ui.RectangleEdge;
27 import org.jfree.chart.plot.Plot;
28 import org.jfree.chart.ChartRenderingInfo;
19 29
20 import org.w3c.dom.Document; 30 import org.w3c.dom.Document;
21 31
22 import de.intevation.artifacts.Artifact; 32 import de.intevation.artifacts.Artifact;
23 33
47 super(text, x, y); 57 super(text, x, y);
48 } 58 }
49 59
50 60
51 /** 61 /**
52 * Yet trivial draw without implementing any CustomAnnotation-specific 62 * Draw the Annotiation if it does not collide with other already drawn
53 * feature. 63 * Annotations.
54 */ 64 *
65 * @param g2 the graphics device.
66 * @param plot the plot.
67 * @param dataArea the data area.
68 * @param domainAxis the domain axis.
69 * @param rangeAxis the range axis.
70 * @param rendererIndex the render index.
71 * @param info state information, escpecially collects info about
72 * already drawn shapes (and thus annotations), used
73 * for collision detection.
74 */
75 @Override
55 public void draw( 76 public void draw(
56 java.awt.Graphics2D g2, 77 java.awt.Graphics2D g2,
57 XYPlot plot, 78 XYPlot plot,
58 java.awt.geom.Rectangle2D dataArea, 79 java.awt.geom.Rectangle2D dataArea,
59 ValueAxis domainAxis, 80 ValueAxis domainAxis,
60 ValueAxis rangeAxis, 81 ValueAxis rangeAxis,
61 int rendererIndex, 82 int rendererIndex,
62 PlotRenderingInfo info) { 83 PlotRenderingInfo info) {
84
85 if (info == null)
86 return;
87
88 // Calculate bounding box as in super.draw().
89 // TODO overwrite draw such that even if the annotation gets painted
90 // the bounding box has to be calculated only once.
91 ChartRenderingInfo chartInfo = info.getOwner();
92
93 PlotOrientation orientation = plot.getOrientation();
94 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
95 plot.getDomainAxisLocation(), orientation);
96 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
97 plot.getRangeAxisLocation(), orientation);
98 float anchorX = (float) domainAxis.valueToJava2D(
99 getX(), dataArea, domainEdge);
100 float anchorY = (float) rangeAxis.valueToJava2D(
101 getY(), dataArea, rangeEdge);
102 if (orientation == PlotOrientation.HORIZONTAL) {
103 float tempAnchor = anchorX;
104 anchorX = anchorY;
105 anchorY = tempAnchor;
106 }
107
108 Shape hotspot = TextUtilities.calculateRotatedStringBounds(
109 getText(), g2, anchorX, anchorY, getTextAnchor(),
110 getRotationAngle(), getRotationAnchor());
111 Rectangle2D hotspotBox = hotspot.getBounds2D();
112
113 // Check for collisions with other XYAnnotations.
114 for (Iterator i = chartInfo.getEntityCollection().iterator();
115 i.hasNext(); ) {
116 Object next = i.next();
117 // Collision with other stuff than XYAnnotations are okay.
118 if (next instanceof XYAnnotationEntity) {
119 XYAnnotationEntity drawnShape = (XYAnnotationEntity) next;
120 if (drawnShape.getArea().intersects(hotspotBox)) {
121 // Found collision, early stop.
122 return;
123 }
124 }
125 }
126
127 // Set URL of current annotation. This will let super.draw() add
128 // the relevant info to the PlotRenderingInfo.
129 setURL("");
63 super.draw(g2, plot, dataArea, domainAxis, rangeAxis, rendererIndex, info); 130 super.draw(g2, plot, dataArea, domainAxis, rangeAxis, rendererIndex, info);
64 } 131 }
65 } 132 }
66 133
67 134
180 posY = (float) yAxis.getRange().getLowerBound(); 247 posY = (float) yAxis.getRange().getLowerBound();
181 // Lets add some (1%) space between Text and Axis . 248 // Lets add some (1%) space between Text and Axis .
182 posY += 0.1f * (yAxis.getRange().getUpperBound() 249 posY += 0.1f * (yAxis.getRange().getUpperBound()
183 - yAxis.getRange().getLowerBound()); 250 - yAxis.getRange().getLowerBound());
184 } 251 }
185 double freeFrom = axis.getRange().getLowerBound(); 252
186 //logger.warn("Axis lower Bound: " + freeFrom); 253 // Add all annotations.
187
188 // Assuming ordered annotations.
189 for (Annotation a: annotations) { 254 for (Annotation a: annotations) {
190 float posX = (float) a.getRange().getA().doubleValue(); 255 float posX = (float) a.getRange().getA().doubleValue();
191 if (posX < freeFrom) { continue; }
192 String text = a.getPosition().getValue(); 256 String text = a.getPosition().getValue();
193 257
194 XYTextAnnotation ta = new CustomAnnotation(text, posX, posY); 258 XYTextAnnotation ta = new CustomAnnotation(text, posX, posY);
195 double rotation = 270.0f * (Math.PI / 180.0f); 259 double rotation = 270.0f * (Math.PI / 180.0f);
196 ta.setRotationAngle(rotation); 260 ta.setRotationAngle(rotation);
197 ta.setRotationAnchor(TextAnchor.CENTER_LEFT); 261 ta.setRotationAnchor(TextAnchor.CENTER_LEFT);
198 ta.setTextAnchor(TextAnchor.CENTER_LEFT); 262 ta.setTextAnchor(TextAnchor.CENTER_LEFT);
199 plot.getRenderer().addAnnotation(ta); 263 plot.getRenderer().addAnnotation(ta);
264 // TODO Merge XYLineAnnotation and CustomAnnotation.
200 XYLineAnnotation la = new XYLineAnnotation(posX, 0, posX, posY); 265 XYLineAnnotation la = new XYLineAnnotation(posX, 0, posX, posY);
201 plot.getRenderer().addAnnotation(la); 266 plot.getRenderer().addAnnotation(la);
202 freeFrom += 2.0;
203 } 267 }
204 } 268 }
205 269
206 270
207 /** 271 /**
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