Mercurial > dive4elements > gnv-client

annotate 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
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 import java.awt.geom.AffineTransform;
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17
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18 import org.jfree.data.Range;
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19
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20 import org.jfree.chart.axis.ValueAxis;
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21
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22 import org.jfree.ui.RectangleEdge;
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23
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24 import org.apache.log4j.Logger;
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26 import org.jfree.text.TextUtilities;
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27
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28
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29 /**
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30 * @author Ingo Weinzierl (ingo.weinzierl@intevation.de)
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31 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
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32 */
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33 public class PolygonRenderer
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34 {
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35 private static Logger log = Logger.getLogger(
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36 PolygonRenderer.class);
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37
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38 public interface PaintLookup {
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39
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40 Paint getPaint(int index);
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41
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42 } // interface PaintLookup
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43
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44 public static class DefaultLabelGenerator
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45 implements PolygonSeriesLabelGenerator
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46 {
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47 public DefaultLabelGenerator() {
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48 }
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49
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50 public String generateLabel(PolygonSeries series) {
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51 Object label = series.getAttribute("label");
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52 return label != null
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53 ? toString(label)
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54 : null;
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55 }
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56
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57 protected String toString(Object label) {
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58 return label.toString();
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59 }
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60 } // class DefaultLabelGenerator
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61
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62 public static final PolygonSeriesLabelGenerator
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63 DEFAULT_LABEL_GENERATOR_INSTANCE = new DefaultLabelGenerator();
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64
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65 protected PaintLookup lookup;
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66 protected PolygonSeriesLabelGenerator labelGenerator;
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67
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68 public PolygonRenderer(PaintLookup lookup) {
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69 this(lookup, null);
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70 }
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71
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72 public PolygonRenderer(
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73 PaintLookup lookup,
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74 PolygonSeriesLabelGenerator labelGenerator
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75 ) {
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76 this.lookup = lookup;
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77 this.labelGenerator = labelGenerator;
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78 }
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79
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80 public void drawPolygons(
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81 Graphics2D graphics,
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82 Rectangle2D rectangle,
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83 PolygonDataset dataset
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84 ) {
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85 Rectangle2D bbox = getBoundingBox(dataset);
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86
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87 double sx = (double)rectangle.getWidth()/bbox.getWidth();
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88 double sy = (double)rectangle.getHeight()/bbox.getHeight();
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89 double tx = rectangle.getMinX();
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90 double ty = rectangle.getMinY();
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91
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92 // XXX: Little hack to draw correctly if data is
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93 // below 0 in y direction.
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94 if (bbox.getMinY() <= 0d && bbox.getMaxY() <= 0d) {
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95 sy = -sy; // mirror
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96 }
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97
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98 AffineTransform xform = graphics.getTransform();
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99
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100 graphics.translate(tx, ty);
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101 graphics.scale(sx, sy);
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102
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103 int seriesCount = dataset.getSeriesCount();
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104 for (int i = 0; i < seriesCount; i++) {
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105 PolygonSeries series = dataset.getSeries(i);
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106 Integer colorIdx = (Integer)series.getAttribute("fill");
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107
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108 if (colorIdx != null) {
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109 Paint paint = lookup.getPaint(colorIdx.intValue());
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110 graphics.setPaint(paint != null ? paint : Color.black);
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111 graphics.fill(constructShape(series, true));
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112 }
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113 else {
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114 Number lineWidth = (Number)series.getAttribute("line.width");
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115 BasicStroke stroke = new BasicStroke(
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116 lineWidth != null ? lineWidth.floatValue() : 1f);
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117 graphics.setStroke(stroke);
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118 graphics.setPaint(Color.black);
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119 graphics.draw(constructShape(series, false));
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120 }
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121 }
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122
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123 graphics.setTransform(xform);
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124 }
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125
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126 public void drawLabels(
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127 final Graphics2D graphics,
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128 final PolygonPlot plot,
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129 final Rectangle2D area,
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130 PolygonDataset dataset
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131 ) {
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132 if (labelGenerator == null) {
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133 return;
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134 }
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135
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136 final ArrayList<Rectangle2D> bboxes = new ArrayList<Rectangle2D>();
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137
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138 Font font = graphics.getFont();
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139 font = font.deriveFont(Font.PLAIN, Math.max(8, font.getSize()-3));
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140 graphics.setFont(font);
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141 FontMetrics metrics = graphics.getFontMetrics(font);
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142
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143 for (int i = dataset.getSeriesCount()-1; i >= 0; --i) {
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144 PolygonSeries series = dataset.getSeries(i);
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145
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146 String label = labelGenerator.generateLabel(series);
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147 if (label == null) {
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148 continue;
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149 }
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150
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151 final Rectangle2D box = TextUtilities.getTextBounds(
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152 label, graphics, metrics);
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153
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154 for (int j = series.getItemCount()-1; j >= 0; --j) {
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155 final CompactXYItems ring = series.getItem(j);
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156 LevelOrderIndices loi = new LevelOrderIndices(ring.size()-1);
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157 Rectangle2D r = (Rectangle2D)loi.visit(
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158 new LevelOrderIndices.Visitor()
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159 {
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160 ValueAxis da = plot.getDomainAxis();
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161 ValueAxis ra = plot.getRangeAxis();
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162 RectangleEdge de = plot.getDomainAxisEdge();
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163 RectangleEdge re = plot.getRangeAxisEdge();
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164 Rectangle2D.Double r = new Rectangle2D.Double(
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165 0d, 0d, box.getWidth(), box.getHeight());
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166
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167 public Object visit(int index) {
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168 r.x = da.valueToJava2D(ring.getX(index), area, de)
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169 - 0.5*box.getWidth();
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170 r.y = ra.valueToJava2D(ring.getY(index), area, re)
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171 + 0.5*box.getHeight();
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diff changeset
172
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173 for (Rectangle2D b: bboxes) {
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174 if (b.intersects(r)) {
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175 return null;
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176 }
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177 }
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178 return r;
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179 }
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180 });
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181
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182 if (r != null) {
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183 bboxes.add(r);
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184 graphics.drawString(
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185 label, (float)r.getX(), (float)r.getY());
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186 }
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187 } // for all items in series
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188 } // for all series
422
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189 }
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190
437
b624879d2902 Added vectorizer rings callback to generate iso lines.
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diff changeset
191 protected Shape constructShape(PolygonSeries series, boolean close) {
422
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192 CompactXYItems [] rings = series.getRings();
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193 GeneralPath path = new GeneralPath();
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194 for (int i = 0; i < rings.length; ++i) {
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195 CompactXYItems ring = rings[i];
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196 double [] data = ring.getData();
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197 if (data.length >= 2) {
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198 path.moveTo((float)data[0], (float)data[1]);
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199 }
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200 for (int j = 2; j < data.length;) {
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201 float x = (float)data[j++];
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202 float y = (float)data[j++];
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203 path.lineTo(x, y);
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parents:
diff changeset
204 }
437
b624879d2902 Added vectorizer rings callback to generate iso lines.
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parents: 422
diff changeset
205 if (close) {
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parents: 422
diff changeset
206 path.closePath();
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parents: 422
diff changeset
207 }
422
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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diff changeset
208 }
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parents:
diff changeset
209 return path;
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parents:
diff changeset
210 }
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
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211
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
212 public Rectangle2D getBoundingBox(PolygonDataset dataset) {
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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213 Rectangle2D bbox = null;
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214
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
215 for (int i = 0, N = dataset.getSeriesCount(); i < N; i++) {
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
216 Range domain = dataset.getSeries(i).getDomainBounds();
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diff changeset
217 Range range = dataset.getSeries(i).getRangeBounds();
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218
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
219 double x = domain.getLowerBound();
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diff changeset
220 double y = range.getLowerBound();
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diff changeset
221 double w = Math.abs(domain.getUpperBound() - x);
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diff changeset
222 double h = Math.abs(range.getUpperBound() - y);
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parents:
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223
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
224 if (bbox == null) {
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
225 bbox = new Rectangle2D.Double(x, y, w, h);
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parents:
diff changeset
226 }
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
227 else {
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
228 bbox.add(new Rectangle2D.Double(x, y, w, h));
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parents:
diff changeset
229 }
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
230 }
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
231
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
232 return bbox;
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
233 }
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
234
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
235 public Rectangle2D getBounds(PolygonSeries series) {
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parents:
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236
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
237 Range domain = series.getDomainBounds();
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
238 Range range = series.getRangeBounds();
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parents:
diff changeset
239
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
240 return new Rectangle2D.Double(
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
241 domain.getLowerBound(), range.getLowerBound(),
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
242 domain.getUpperBound(), range.getUpperBound()
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
243 );
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
244 }
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
245 }
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
246 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org