Mercurial > dive4elements > gnv-client

comparison gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/PolygonRenderer.java @ 450:20a480753ff9

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Render labels in vertical cross section charts. gnv-artifacts/trunk@498 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 04 Jan 2010 02:49:42 +0000
parents 92b7ccbf6163
children bc5901bb4525
comparison
equal deleted inserted replaced
449:c7ca2fce041f 450:20a480753ff9
1 package de.intevation.gnv.jfreechart; 1 package de.intevation.gnv.jfreechart;
2
3 import java.util.ArrayList;
2 4
3 import java.awt.Color; 5 import java.awt.Color;
4 import java.awt.Graphics2D; 6 import java.awt.Graphics2D;
5 import java.awt.Paint; 7 import java.awt.Paint;
6 import java.awt.Shape; 8 import java.awt.Shape;
7 import java.awt.BasicStroke; 9 import java.awt.BasicStroke;
10 import java.awt.FontMetrics;
11 import java.awt.Font;
8 12
9 import java.awt.geom.GeneralPath; 13 import java.awt.geom.GeneralPath;
10 import java.awt.geom.Rectangle2D; 14 import java.awt.geom.Rectangle2D;
11 import java.awt.geom.Rectangle2D.Double; 15 import java.awt.geom.Rectangle2D.Double;
16 import java.awt.geom.AffineTransform;
12 17
13 import org.jfree.data.Range; 18 import org.jfree.data.Range;
14 19
20 import org.jfree.chart.axis.ValueAxis;
21
22 import org.jfree.ui.RectangleEdge;
23
15 import org.apache.log4j.Logger; 24 import org.apache.log4j.Logger;
16 25
26 import org.jfree.text.TextUtilities;
27
28
17 /** 29 /**
18 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de> 30 * @author Ingo Weinzierl (ingo.weinzierl@intevation.de)
31 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
19 */ 32 */
20 public class PolygonRenderer 33 public class PolygonRenderer
21 { 34 {
22 private static Logger log = Logger.getLogger( 35 private static Logger log = Logger.getLogger(
23 PolygonRenderer.class); 36 PolygonRenderer.class);
24 37
25 public static final int AREA = 1;
26 public static final int LINES = 2;
27 public static final int AREA_AND_LINES = AREA | LINES;
28
29 public interface PaintLookup { 38 public interface PaintLookup {
30 39
31 Paint getPaint(int index); 40 Paint getPaint(int index);
32 41
33 } // interface PaintLookup 42 } // interface PaintLookup
34 43
35 protected int type; 44 public static class DefaultLabelGenerator
36 45 implements PolygonSeriesLabelGenerator
37 protected PaintLookup lookup; 46 {
38 47 public DefaultLabelGenerator() {
39 protected PolygonPlot plot; 48 }
40 49
50 public String generateLabel(PolygonSeries series) {
51 Object label = series.getAttribute("label");
52 return label != null
53 ? toString(label)
54 : null;
55 }
56
57 protected String toString(Object label) {
58 return label.toString();
59 }
60 } // class DefaultLabelGenerator
61
62 public static final PolygonSeriesLabelGenerator
63 DEFAULT_LABEL_GENERATOR_INSTANCE = new DefaultLabelGenerator();
64
65 protected PaintLookup lookup;
66 protected PolygonSeriesLabelGenerator labelGenerator;
41 67
42 public PolygonRenderer(PaintLookup lookup) { 68 public PolygonRenderer(PaintLookup lookup) {
43 this(lookup, AREA); 69 this(lookup, null);
44 } 70 }
45 71
46 public PolygonRenderer(PaintLookup lookup, int type) { 72 public PolygonRenderer(
47 this.lookup = lookup; 73 PaintLookup lookup,
48 this.type = type; 74 PolygonSeriesLabelGenerator labelGenerator
49 } 75 ) {
50 76 this.lookup = lookup;
51 public void draw( 77 this.labelGenerator = labelGenerator;
78 }
79
80 public void drawPolygons(
52 Graphics2D graphics, 81 Graphics2D graphics,
53 Rectangle2D rectangle, 82 Rectangle2D rectangle,
54 PolygonDataset dataset 83 PolygonDataset dataset
55 ) { 84 ) {
56 Rectangle2D bbox = getBoundingBox(dataset); 85 Rectangle2D bbox = getBoundingBox(dataset);
63 // XXX: Little hack to draw correctly if data is 92 // XXX: Little hack to draw correctly if data is
64 // below 0 in y direction. 93 // below 0 in y direction.
65 if (bbox.getMinY() <= 0d && bbox.getMaxY() <= 0d) { 94 if (bbox.getMinY() <= 0d && bbox.getMaxY() <= 0d) {
66 sy = -sy; // mirror 95 sy = -sy; // mirror
67 } 96 }
97
98 AffineTransform xform = graphics.getTransform();
68 99
69 graphics.translate(tx, ty); 100 graphics.translate(tx, ty);
70 graphics.scale(sx, sy); 101 graphics.scale(sx, sy);
71 102
72 int seriesCount = dataset.getSeriesCount(); 103 int seriesCount = dataset.getSeriesCount();
86 graphics.setStroke(stroke); 117 graphics.setStroke(stroke);
87 graphics.setPaint(Color.black); 118 graphics.setPaint(Color.black);
88 graphics.draw(constructShape(series, false)); 119 graphics.draw(constructShape(series, false));
89 } 120 }
90 } 121 }
122
123 graphics.setTransform(xform);
124 }
125
126 public void drawLabels(
127 final Graphics2D graphics,
128 final PolygonPlot plot,
129 final Rectangle2D area,
130 PolygonDataset dataset
131 ) {
132 if (labelGenerator == null) {
133 return;
134 }
135
136 final ArrayList<Rectangle2D> bboxes = new ArrayList<Rectangle2D>();
137
138 Font font = graphics.getFont();
139 font = font.deriveFont(Font.PLAIN, Math.max(8, font.getSize()-3));
140 graphics.setFont(font);
141 FontMetrics metrics = graphics.getFontMetrics(font);
142
143 for (int i = dataset.getSeriesCount()-1; i >= 0; --i) {
144 PolygonSeries series = dataset.getSeries(i);
145
146 String label = labelGenerator.generateLabel(series);
147 if (label == null) {
148 continue;
149 }
150
151 final Rectangle2D box = TextUtilities.getTextBounds(
152 label, graphics, metrics);
153
154 for (int j = series.getItemCount()-1; j >= 0; --j) {
155 final CompactXYItems ring = series.getItem(j);
156 LevelOrderIndices loi = new LevelOrderIndices(ring.size()-1);
157 Rectangle2D r = (Rectangle2D)loi.visit(
158 new LevelOrderIndices.Visitor()
159 {
160 ValueAxis da = plot.getDomainAxis();
161 ValueAxis ra = plot.getRangeAxis();
162 RectangleEdge de = plot.getDomainAxisEdge();
163 RectangleEdge re = plot.getRangeAxisEdge();
164 Rectangle2D.Double r = new Rectangle2D.Double(
165 0d, 0d, box.getWidth(), box.getHeight());
166
167 public Object visit(int index) {
168 r.x = da.valueToJava2D(ring.getX(index), area, de)
169 - 0.5*box.getWidth();
170 r.y = ra.valueToJava2D(ring.getY(index), area, re)
171 + 0.5*box.getHeight();
172
173 for (Rectangle2D b: bboxes) {
174 if (b.intersects(r)) {
175 return null;
176 }
177 }
178 return r;
179 }
180 });
181
182 if (r != null) {
183 bboxes.add(r);
184 graphics.drawString(
185 label, (float)r.getX(), (float)r.getY());
186 }
187 } // for all items in series
188 } // for all series
91 } 189 }
92 190
93 protected Shape constructShape(PolygonSeries series, boolean close) { 191 protected Shape constructShape(PolygonSeries series, boolean close) {
94 CompactXYItems [] rings = series.getRings(); 192 CompactXYItems [] rings = series.getRings();
95 GeneralPath path = new GeneralPath(); 193 GeneralPath path = new GeneralPath();
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