Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/PolygonRenderer.java @ 468:7ba4c7222265

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Added ij-Index determination for horizontal-cross-sections. gnv-artifacts/trunk@531 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 12 Jan 2010 11:34:25 +0000
parents bc5901bb4525
children 9a828e5a2390
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.util.ArrayList;
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4
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5 import java.awt.Color;
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6 import java.awt.Graphics2D;
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7 import java.awt.Paint;
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8 import java.awt.Shape;
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9 import java.awt.BasicStroke;
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10 import java.awt.FontMetrics;
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11 import java.awt.Font;
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12
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13 import java.awt.geom.GeneralPath;
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14 import java.awt.geom.Rectangle2D;
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15 import java.awt.geom.Rectangle2D.Double;
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16
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17 import org.jfree.data.Range;
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19 import org.jfree.chart.axis.ValueAxis;
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20
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21 import org.jfree.ui.RectangleEdge;
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22
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23 import org.apache.log4j.Logger;
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25 import org.jfree.text.TextUtilities;
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26
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27
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28 /**
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29 * @author Ingo Weinzierl (ingo.weinzierl@intevation.de)
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30 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
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31 */
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32 public class PolygonRenderer
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33 {
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34 private static Logger log = Logger.getLogger(
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35 PolygonRenderer.class);
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36
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37 public interface PaintLookup {
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38
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39 Paint getPaint(int index);
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40
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41 } // interface PaintLookup
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43 public static class DefaultLabelGenerator
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44 implements PolygonSeriesLabelGenerator
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45 {
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46 public DefaultLabelGenerator() {
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47 }
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48
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49 public String generateLabel(PolygonSeries series) {
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50 Object label = series.getAttribute("label");
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51 return label != null
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52 ? toString(label)
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53 : null;
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54 }
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55
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56 protected String toString(Object label) {
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57 return label.toString();
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58 }
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59 } // class DefaultLabelGenerator
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61 public static final PolygonSeriesLabelGenerator
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62 DEFAULT_LABEL_GENERATOR_INSTANCE = new DefaultLabelGenerator();
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63
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64 protected PaintLookup lookup;
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65 protected PolygonSeriesLabelGenerator labelGenerator;
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66
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67 public PolygonRenderer(PaintLookup lookup) {
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68 this(lookup, null);
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69 }
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71 public PolygonRenderer(
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72 PaintLookup lookup,
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73 PolygonSeriesLabelGenerator labelGenerator
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74 ) {
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75 this.lookup = lookup;
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76 this.labelGenerator = labelGenerator;
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77 }
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78
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79 public void drawPolygons(
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80 Graphics2D graphics,
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81 PolygonPlot plot,
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82 Rectangle2D area,
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83 PolygonDataset dataset
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84 ) {
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85 int seriesCount = dataset.getSeriesCount();
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86 for (int i = 0; i < seriesCount; i++) {
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87 PolygonSeries series = dataset.getSeries(i);
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88 Integer colorIdx = (Integer)series.getAttribute("fill");
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89
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90 if (colorIdx != null) {
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91 Paint paint = lookup.getPaint(colorIdx.intValue());
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92 graphics.setPaint(paint != null ? paint : Color.black);
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93 graphics.fill(constructShape(plot, area, series, true));
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94 }
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95 else {
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96 Number lineWidth = (Number)series.getAttribute("line.width");
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97 BasicStroke stroke = new BasicStroke(
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98 lineWidth != null ? lineWidth.floatValue() : 1f);
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99 graphics.setStroke(stroke);
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100 graphics.setPaint(Color.black);
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101 graphics.draw(constructShape(plot, area, series, false));
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102 }
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103 }
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104 }
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105
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106 public void drawLabels(
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107 final Graphics2D graphics,
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108 final PolygonPlot plot,
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109 final Rectangle2D area,
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110 PolygonDataset dataset
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111 ) {
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112 if (labelGenerator == null) {
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113 return;
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114 }
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115
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116 final ArrayList<Rectangle2D> bboxes = new ArrayList<Rectangle2D>();
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117
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118 Font font = graphics.getFont();
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119 font = font.deriveFont(Font.PLAIN, Math.max(8, font.getSize()-3));
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120 graphics.setFont(font);
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121 FontMetrics metrics = graphics.getFontMetrics(font);
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122
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123 for (int i = dataset.getSeriesCount()-1; i >= 0; --i) {
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124 PolygonSeries series = dataset.getSeries(i);
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125
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126 String label = labelGenerator.generateLabel(series);
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127 if (label == null) {
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128 continue;
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129 }
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130
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131 final Rectangle2D box = TextUtilities.getTextBounds(
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132 label, graphics, metrics);
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133
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134 for (int j = series.getItemCount()-1; j >= 0; --j) {
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135 final CompactXYItems ring = series.getItem(j);
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136 LevelOrderIndices loi = new LevelOrderIndices(ring.size()-1);
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137 Rectangle2D r = (Rectangle2D)loi.visit(
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138 new LevelOrderIndices.Visitor()
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139 {
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140 ValueAxis da = plot.getDomainAxis();
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141 ValueAxis ra = plot.getRangeAxis();
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142 RectangleEdge de = plot.getDomainAxisEdge();
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143 RectangleEdge re = plot.getRangeAxisEdge();
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144 Rectangle2D.Double r = new Rectangle2D.Double(
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145 0d, 0d, box.getWidth(), box.getHeight());
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146
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147 public Object visit(int index) {
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148 r.x = da.valueToJava2D(ring.getX(index), area, de)
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149 - 0.5*box.getWidth();
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150 r.y = ra.valueToJava2D(ring.getY(index), area, re)
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151 + 0.5*box.getHeight();
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152
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153 for (Rectangle2D b: bboxes) {
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154 if (b.intersects(r)) {
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155 return null;
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156 }
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157 }
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158 return r;
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159 }
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160 });
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161
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162 if (r != null) {
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163 bboxes.add(r);
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164 graphics.drawString(
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165 label, (float)r.getX(), (float)r.getY());
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166 }
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167 } // for all items in series
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168 } // for all series
422
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169 }
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170
451
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171 protected Shape constructShape(
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172 PolygonPlot plot,
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173 Rectangle2D area,
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174 PolygonSeries series,
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175 boolean close
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176 ) {
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177 ValueAxis da = plot.getDomainAxis();
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178 ValueAxis ra = plot.getRangeAxis();
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179 RectangleEdge de = plot.getDomainAxisEdge();
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180 RectangleEdge re = plot.getRangeAxisEdge();
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181
422
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182 CompactXYItems [] rings = series.getRings();
451
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183 GeneralPath path = new GeneralPath();
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184
422
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185 for (int i = 0; i < rings.length; ++i) {
451
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186
422
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187 CompactXYItems ring = rings[i];
451
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188
422
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189 double [] data = ring.getData();
451
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190
422
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191 if (data.length >= 2) {
451
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192 path.moveTo(
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193 (float)da.valueToJava2D(data[0], area, de),
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194 (float)ra.valueToJava2D(data[1], area, re));
422
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195 }
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196 for (int j = 2; j < data.length;) {
451
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197 path.lineTo(
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198 (float)da.valueToJava2D(data[j++], area, de),
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199 (float)ra.valueToJava2D(data[j++], area, re));
422
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200 }
437
b624879d2902 Added vectorizer rings callback to generate iso lines.
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diff changeset
201 if (close) {
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diff changeset
202 path.closePath();
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203 }
422
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204 }
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205 return path;
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parents:
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206 }
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207
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208 public Rectangle2D getBoundingBox(PolygonDataset dataset) {
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209 Rectangle2D bbox = null;
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210
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211 for (int i = 0, N = dataset.getSeriesCount(); i < N; i++) {
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212 Range domain = dataset.getSeries(i).getDomainBounds();
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213 Range range = dataset.getSeries(i).getRangeBounds();
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214
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215 double x = domain.getLowerBound();
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216 double y = range.getLowerBound();
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217 double w = Math.abs(domain.getUpperBound() - x);
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218 double h = Math.abs(range.getUpperBound() - y);
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219
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220 if (bbox == null) {
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221 bbox = new Rectangle2D.Double(x, y, w, h);
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222 }
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parents:
diff changeset
223 else {
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224 bbox.add(new Rectangle2D.Double(x, y, w, h));
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225 }
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parents:
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226 }
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227
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228 return bbox;
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229 }
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230
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231 public Rectangle2D getBounds(PolygonSeries series) {
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232
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233 Range domain = series.getDomainBounds();
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234 Range range = series.getRangeBounds();
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235
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236 return new Rectangle2D.Double(
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237 domain.getLowerBound(), range.getLowerBound(),
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238 domain.getUpperBound(), range.getUpperBound()
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parents:
diff changeset
239 );
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240 }
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parents:
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241 }
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parents:
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242 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org