Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/PolygonRenderer.java @ 446:f5a041000357

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Connected vertical cross section with chart generation. gnv-artifacts/trunk@494 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 01 Jan 2010 12:08:05 +0000
parents b624879d2902
children 92b7ccbf6163
rev   line source
422
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1 package de.intevation.gnv.jfreechart;
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2
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3 import java.awt.Color;
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4 import java.awt.Graphics2D;
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5 import java.awt.Paint;
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6 import java.awt.Shape;
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7 import java.awt.geom.GeneralPath;
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8 import java.awt.geom.Rectangle2D;
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9 import java.awt.geom.Rectangle2D.Double;
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10
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11 import org.jfree.data.Range;
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12
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13 /**
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14 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
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15 */
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16 public class PolygonRenderer
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17 {
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18 public static final int AREA = 1;
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19 public static final int LINES = 2;
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20 public static final int AREA_AND_LINES = AREA | LINES;
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21
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22 public interface PaintLookup {
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23
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24 Paint getPaint(int index);
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25
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26 } // interface PaintLookup
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27
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28 protected int type;
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29
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30 protected PaintLookup lookup;
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31
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32 protected PolygonPlot plot;
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33
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34
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35 public PolygonRenderer(PaintLookup lookup) {
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36 this(lookup, AREA);
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37 }
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38
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39 public PolygonRenderer(PaintLookup lookup, int type) {
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40 this.lookup = lookup;
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41 this.type = type;
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42 }
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43
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44 public void draw(
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45 Graphics2D graphics,
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46 Rectangle2D rectangle,
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47 PolygonDataset dataset
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48 ) {
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49 Rectangle2D bbox = getBoundingBox(dataset);
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50
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51 double sx = (double)rectangle.getWidth()/bbox.getWidth();
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52 double sy = (double)rectangle.getHeight()/bbox.getHeight();
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53 double tx = rectangle.getMinX();
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54 double ty = rectangle.getMinY();
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55
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56 // XXX: Little hack to draw correctly if data is
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57 // below 0 in y direction.
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58 if (bbox.getMinY() <= 0d && bbox.getMaxY() <= 0d) {
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59 sy = -sy; // mirror
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60 }
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61
422
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62 graphics.translate(tx, ty);
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63 graphics.scale(sx, sy);
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64
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65 int seriesCount = dataset.getSeriesCount();
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66 for (int i = 0; i < seriesCount; i++) {
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67 PolygonSeries series = dataset.getSeries(i);
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68 Integer colorIdx = (Integer)series.getAttribute("fill");
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69
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70 if (colorIdx != null) {
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71 Paint paint = lookup.getPaint(colorIdx.intValue());
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72 graphics.setPaint(paint != null ? paint : Color.black);
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73 graphics.fill(constructShape(series, true));
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74 }
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75 else {
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76 graphics.setPaint(Color.black);
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77 graphics.draw(constructShape(series, false));
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78 }
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79 }
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80 }
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81
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82 protected Shape constructShape(PolygonSeries series, boolean close) {
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83 CompactXYItems [] rings = series.getRings();
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84 GeneralPath path = new GeneralPath();
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85 for (int i = 0; i < rings.length; ++i) {
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86 CompactXYItems ring = rings[i];
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87 double [] data = ring.getData();
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88 if (data.length >= 2) {
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89 path.moveTo((float)data[0], (float)data[1]);
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90 }
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91 for (int j = 2; j < data.length;) {
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92 float x = (float)data[j++];
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93 float y = (float)data[j++];
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94 path.lineTo(x, y);
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95 }
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96 if (close) {
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97 path.closePath();
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98 }
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99 }
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100 return path;
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101 }
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102
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103 public Rectangle2D getBoundingBox(PolygonDataset dataset) {
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104 Rectangle2D bbox = null;
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105
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106 for (int i = 0, N = dataset.getSeriesCount(); i < N; i++) {
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107 Range domain = dataset.getSeries(i).getDomainBounds();
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108 Range range = dataset.getSeries(i).getRangeBounds();
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109
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110 double x = domain.getLowerBound();
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111 double y = range.getLowerBound();
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112 double w = Math.abs(domain.getUpperBound() - x);
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113 double h = Math.abs(range.getUpperBound() - y);
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114
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115 if (bbox == null) {
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116 bbox = new Rectangle2D.Double(x, y, w, h);
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117 }
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118 else {
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119 bbox.add(new Rectangle2D.Double(x, y, w, h));
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120 }
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121 }
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122
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123 return bbox;
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124 }
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125
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126 public Rectangle2D getBounds(PolygonSeries series) {
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127
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128 Range domain = series.getDomainBounds();
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129 Range range = series.getRangeBounds();
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130
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131 return new Rectangle2D.Double(
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132 domain.getLowerBound(), range.getLowerBound(),
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133 domain.getUpperBound(), range.getUpperBound()
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134 );
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135 }
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136 }
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137 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org