Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/PolygonRenderer.java @ 448:3cb2bea50456

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Generate iso line classes according gnv-issues/issue108 gnv-artifacts/trunk@496 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sun, 03 Jan 2010 12:16:55 +0000
parents 92b7ccbf6163
children 20a480753ff9
rev   line source
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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.BasicStroke;
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8
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9 import java.awt.geom.GeneralPath;
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10 import java.awt.geom.Rectangle2D;
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11 import java.awt.geom.Rectangle2D.Double;
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12
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13 import org.jfree.data.Range;
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14
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15 import org.apache.log4j.Logger;
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16
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17 /**
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18 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
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19 */
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20 public class PolygonRenderer
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21 {
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22 private static Logger log = Logger.getLogger(
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23 PolygonRenderer.class);
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24
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25 public static final int AREA = 1;
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26 public static final int LINES = 2;
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27 public static final int AREA_AND_LINES = AREA | LINES;
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28
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29 public interface PaintLookup {
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30
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31 Paint getPaint(int index);
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32
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33 } // interface PaintLookup
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34
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35 protected int type;
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36
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37 protected PaintLookup lookup;
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38
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39 protected PolygonPlot plot;
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40
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41
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42 public PolygonRenderer(PaintLookup lookup) {
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43 this(lookup, AREA);
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44 }
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45
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46 public PolygonRenderer(PaintLookup lookup, int type) {
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47 this.lookup = lookup;
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48 this.type = type;
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49 }
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50
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51 public void draw(
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52 Graphics2D graphics,
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53 Rectangle2D rectangle,
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54 PolygonDataset dataset
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55 ) {
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56 Rectangle2D bbox = getBoundingBox(dataset);
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57
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58 double sx = (double)rectangle.getWidth()/bbox.getWidth();
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59 double sy = (double)rectangle.getHeight()/bbox.getHeight();
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60 double tx = rectangle.getMinX();
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61 double ty = rectangle.getMinY();
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62
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63 // XXX: Little hack to draw correctly if data is
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64 // below 0 in y direction.
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65 if (bbox.getMinY() <= 0d && bbox.getMaxY() <= 0d) {
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66 sy = -sy; // mirror
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67 }
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68
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69 graphics.translate(tx, ty);
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70 graphics.scale(sx, sy);
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71
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72 int seriesCount = dataset.getSeriesCount();
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73 for (int i = 0; i < seriesCount; i++) {
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74 PolygonSeries series = dataset.getSeries(i);
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75 Integer colorIdx = (Integer)series.getAttribute("fill");
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76
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77 if (colorIdx != null) {
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78 Paint paint = lookup.getPaint(colorIdx.intValue());
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79 graphics.setPaint(paint != null ? paint : Color.black);
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80 graphics.fill(constructShape(series, true));
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81 }
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82 else {
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83 Number lineWidth = (Number)series.getAttribute("line.width");
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84 BasicStroke stroke = new BasicStroke(
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85 lineWidth != null ? lineWidth.floatValue() : 1f);
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86 graphics.setStroke(stroke);
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87 graphics.setPaint(Color.black);
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88 graphics.draw(constructShape(series, false));
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89 }
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90 }
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91 }
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92
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93 protected Shape constructShape(PolygonSeries series, boolean close) {
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94 CompactXYItems [] rings = series.getRings();
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95 GeneralPath path = new GeneralPath();
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96 for (int i = 0; i < rings.length; ++i) {
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97 CompactXYItems ring = rings[i];
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98 double [] data = ring.getData();
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99 if (data.length >= 2) {
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100 path.moveTo((float)data[0], (float)data[1]);
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101 }
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102 for (int j = 2; j < data.length;) {
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103 float x = (float)data[j++];
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104 float y = (float)data[j++];
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105 path.lineTo(x, y);
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106 }
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107 if (close) {
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108 path.closePath();
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109 }
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110 }
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111 return path;
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112 }
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113
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114 public Rectangle2D getBoundingBox(PolygonDataset dataset) {
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115 Rectangle2D bbox = null;
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116
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117 for (int i = 0, N = dataset.getSeriesCount(); i < N; i++) {
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118 Range domain = dataset.getSeries(i).getDomainBounds();
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119 Range range = dataset.getSeries(i).getRangeBounds();
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120
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121 double x = domain.getLowerBound();
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122 double y = range.getLowerBound();
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123 double w = Math.abs(domain.getUpperBound() - x);
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124 double h = Math.abs(range.getUpperBound() - y);
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125
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126 if (bbox == null) {
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127 bbox = new Rectangle2D.Double(x, y, w, h);
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128 }
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129 else {
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130 bbox.add(new Rectangle2D.Double(x, y, w, h));
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131 }
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132 }
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133
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134 return bbox;
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135 }
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136
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137 public Rectangle2D getBounds(PolygonSeries series) {
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138
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139 Range domain = series.getDomainBounds();
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140 Range range = series.getRangeBounds();
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141
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142 return new Rectangle2D.Double(
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143 domain.getLowerBound(), range.getLowerBound(),
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144 domain.getUpperBound(), range.getUpperBound()
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145 );
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146 }
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147 }
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148 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org