Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/PolygonRenderer.java @ 1119:7c4f81f74c47

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merged gnv-artifacts
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:00 +0200
parents f953c9a559d8
children
rev   line source
1115
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.jfreechart;
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10
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11 import java.awt.BasicStroke;
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12 import java.awt.Color;
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13 import java.awt.Font;
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14 import java.awt.FontMetrics;
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15 import java.awt.Graphics2D;
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16 import java.awt.Paint;
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17 import java.awt.Shape;
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18
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19 import java.awt.geom.GeneralPath;
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21 import java.awt.geom.Rectangle2D.Double;
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22
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23 import java.awt.geom.Rectangle2D;
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24
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25 import java.util.ArrayList;
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26
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27 import org.apache.log4j.Logger;
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29 import org.jfree.chart.axis.ValueAxis;
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30
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31 import org.jfree.data.Range;
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32
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33 import org.jfree.text.TextUtilities;
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34
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35 import org.jfree.ui.RectangleEdge;
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36
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37 /**
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38 * This renderer is used to draw polygons into a Graphics object.
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39 *
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40 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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41 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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42 */
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43 public class PolygonRenderer
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44 {
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45 private static Logger log = Logger.getLogger(
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46 PolygonRenderer.class);
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47
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48 /**
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49 * This interfaces describes a single method to retrieve a Paint object
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50 * for a given index.
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51 */
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52 public interface PaintLookup {
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53
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54 /**
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55 *
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56 * @param index Index.
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57 * @return Paint
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58 */
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59 Paint getPaint(int index);
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60
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61 } // interface PaintLookup
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62
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63 /**
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64 * This class is used to generate labels for a given series.
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65 */
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66 public static class DefaultLabelGenerator
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67 implements PolygonSeriesLabelGenerator
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68 {
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69 /**
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70 * Construts an empty DefaultLabelGenerator.
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71 */
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72 public DefaultLabelGenerator() {
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73 }
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74
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75 /**
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76 *
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77 * @param series A PolygonSeries.
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78 * @return The label of series.
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79 */
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80 public String generateLabel(PolygonSeries series) {
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81 Object label = series.getAttribute("label");
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82 return label != null
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83 ? toString(label)
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84 : null;
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85 }
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86
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87 /**
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88 *
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89 * @param label Object
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90 * @return String representaton of label.
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91 */
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92 protected String toString(Object label) {
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93 return label.toString();
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94 }
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95 } // class DefaultLabelGenerator
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96
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97 /**
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98 * Constructor.
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99 */
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100 public static final PolygonSeriesLabelGenerator
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101 DEFAULT_LABEL_GENERATOR_INSTANCE = new DefaultLabelGenerator();
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102
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103 protected PaintLookup lookup;
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104
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105 protected PolygonSeriesLabelGenerator labelGenerator;
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106
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107
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108 public PolygonRenderer(PaintLookup lookup) {
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109 this(lookup, null);
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110 }
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111
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112
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113 public PolygonRenderer(
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114 PaintLookup lookup,
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115 PolygonSeriesLabelGenerator labelGenerator
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116 ) {
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117 this.lookup = lookup;
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118 this.labelGenerator = labelGenerator;
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119 }
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120
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121 /**
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122 * This method draws polygons of each series in <code>dataset</code> into
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123 * the given graphics object. If a polygon has no attribute 'fill', we
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124 * expect that it is a line, otherwise the polygon is filled.
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125 *
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126 */
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127 public void drawPolygons(
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128 Graphics2D graphics,
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129 PolygonPlot plot,
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130 Rectangle2D area,
422
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131 PolygonDataset dataset
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132 ) {
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133 int seriesCount = dataset.getSeriesCount();
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134 for (int i = 0; i < seriesCount; i++) {
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135 PolygonSeries series = dataset.getSeries(i);
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136 Integer colorIdx = (Integer)series.getAttribute("fill");
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137
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138 if (colorIdx != null) {
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139 Paint paint = lookup.getPaint(colorIdx.intValue());
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140 graphics.setPaint(paint != null ? paint : Color.black);
451
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141 graphics.fill(constructShape(plot, area, series, true));
422
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142 }
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143 else {
447
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144 Number lineWidth = (Number)series.getAttribute("line.width");
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145 BasicStroke stroke = new BasicStroke(
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diff changeset
146 lineWidth != null ? lineWidth.floatValue() : 1f);
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147 graphics.setStroke(stroke);
422
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148 graphics.setPaint(Color.black);
451
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149 graphics.draw(constructShape(plot, area, series, false));
422
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150 }
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151 }
450
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152 }
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153
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154 /**
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155 * Draw labels at each item of a series in the given dataset. If the series
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156 * has no label attritue, no label is drawn.
803
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157 *
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158 */
450
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159 public void drawLabels(
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160 final Graphics2D graphics,
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161 final PolygonPlot plot,
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162 final Rectangle2D area,
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163 PolygonDataset dataset
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164 ) {
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165 if (labelGenerator == null) {
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166 return;
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167 }
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168
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169 final ArrayList<Rectangle2D> bboxes = new ArrayList<Rectangle2D>();
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170
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171 Font font = graphics.getFont();
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172 font = font.deriveFont(Font.PLAIN, Math.max(8, font.getSize()-3));
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173 graphics.setFont(font);
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174 FontMetrics metrics = graphics.getFontMetrics(font);
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175
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176 for (int i = dataset.getSeriesCount()-1; i >= 0; --i) {
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diff changeset
177 PolygonSeries series = dataset.getSeries(i);
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178
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179 String label = labelGenerator.generateLabel(series);
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180 if (label == null) {
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diff changeset
181 continue;
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182 }
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183
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184 final Rectangle2D box = TextUtilities.getTextBounds(
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diff changeset
185 label, graphics, metrics);
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186
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187 for (int j = series.getItemCount()-1; j >= 0; --j) {
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188 final CompactXYItems ring = series.getItem(j);
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189 LevelOrderIndices loi = new LevelOrderIndices(ring.size()-1);
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190 Rectangle2D r = (Rectangle2D)loi.visit(
778
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parents: 451
diff changeset
191 new LevelOrderIndices.Visitor()
450
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192 {
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193 ValueAxis da = plot.getDomainAxis();
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194 ValueAxis ra = plot.getRangeAxis();
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195 RectangleEdge de = plot.getDomainAxisEdge();
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196 RectangleEdge re = plot.getRangeAxisEdge();
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diff changeset
197 Rectangle2D.Double r = new Rectangle2D.Double(
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diff changeset
198 0d, 0d, box.getWidth(), box.getHeight());
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199
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diff changeset
200 public Object visit(int index) {
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diff changeset
201 r.x = da.valueToJava2D(ring.getX(index), area, de)
450
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diff changeset
202 - 0.5*box.getWidth();
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diff changeset
203 r.y = ra.valueToJava2D(ring.getY(index), area, re)
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diff changeset
204 + 0.5*box.getHeight();
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parents: 447
diff changeset
205
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diff changeset
206 for (Rectangle2D b: bboxes) {
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diff changeset
207 if (b.intersects(r)) {
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parents: 447
diff changeset
208 return null;
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diff changeset
209 }
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diff changeset
210 }
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parents: 447
diff changeset
211 return r;
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parents: 447
diff changeset
212 }
20a480753ff9 Render labels in vertical cross section charts.
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parents: 447
diff changeset
213 });
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parents: 447
diff changeset
214
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parents: 447
diff changeset
215 if (r != null) {
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parents: 447
diff changeset
216 bboxes.add(r);
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parents: 447
diff changeset
217 graphics.drawString(
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parents: 447
diff changeset
218 label, (float)r.getX(), (float)r.getY());
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diff changeset
219 }
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220 } // for all items in series
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diff changeset
221 } // for all series
422
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parents:
diff changeset
222 }
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parents:
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223
795
cdade5005cba Added javadoc in jfreechart package.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
224 /**
cdade5005cba Added javadoc in jfreechart package.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
225 * Creates a shape made up of the CompactXYItems object stored in the given
cdade5005cba Added javadoc in jfreechart package.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
226 * series.
cdade5005cba Added javadoc in jfreechart package.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
227 *
cdade5005cba Added javadoc in jfreechart package.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
228 * @param plot The plot.
cdade5005cba Added javadoc in jfreechart package.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
229 * @param area The boundary.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
230 * @param series The series storing the items.
cdade5005cba Added javadoc in jfreechart package.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
231 * @param close Specifies if the polygon should be closed or not.
815
22c18083225e Removed compiler warnings while JavaDoc generation.
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parents: 803
diff changeset
232 * @return the constructed shape.
795
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
233 */
451
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parents: 450
diff changeset
234 protected Shape constructShape(
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parents: 450
diff changeset
235 PolygonPlot plot,
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parents: 450
diff changeset
236 Rectangle2D area,
778
9a828e5a2390 Removed trailing whitespace
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parents: 451
diff changeset
237 PolygonSeries series,
451
bc5901bb4525 Use JFreeCharts ValueAxis.valueToJava2D() to transform data values
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parents: 450
diff changeset
238 boolean close
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parents: 450
diff changeset
239 ) {
bc5901bb4525 Use JFreeCharts ValueAxis.valueToJava2D() to transform data values
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parents: 450
diff changeset
240 ValueAxis da = plot.getDomainAxis();
bc5901bb4525 Use JFreeCharts ValueAxis.valueToJava2D() to transform data values
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parents: 450
diff changeset
241 ValueAxis ra = plot.getRangeAxis();
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 450
diff changeset
242 RectangleEdge de = plot.getDomainAxisEdge();
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parents: 450
diff changeset
243 RectangleEdge re = plot.getRangeAxisEdge();
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parents: 450
diff changeset
244
422
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
245 CompactXYItems [] rings = series.getRings();
451
bc5901bb4525 Use JFreeCharts ValueAxis.valueToJava2D() to transform data values
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parents: 450
diff changeset
246 GeneralPath path = new GeneralPath();
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parents: 450
diff changeset
247
422
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
248 for (int i = 0; i < rings.length; ++i) {
451
bc5901bb4525 Use JFreeCharts ValueAxis.valueToJava2D() to transform data values
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parents: 450
diff changeset
249
422
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
250 CompactXYItems ring = rings[i];
451
bc5901bb4525 Use JFreeCharts ValueAxis.valueToJava2D() to transform data values
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parents: 450
diff changeset
251
422
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
252 double [] data = ring.getData();
451
bc5901bb4525 Use JFreeCharts ValueAxis.valueToJava2D() to transform data values
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parents: 450
diff changeset
253
422
f426f55d4f7a Added Ingo Weinzierl's special JFreeChart classes.
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parents:
diff changeset
254 if (data.length >= 2) {
451
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255 path.moveTo(
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256 (float)da.valueToJava2D(data[0], area, de),
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257 (float)ra.valueToJava2D(data[1], area, re));
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258 }
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259 for (int j = 2; j < data.length;) {
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260 path.lineTo(
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261 (float)da.valueToJava2D(data[j++], area, de),
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262 (float)ra.valueToJava2D(data[j++], area, re));
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263 }
437
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264 if (close) {
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265 path.closePath();
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266 }
422
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267 }
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268 return path;
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269 }
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270
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271 /**
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272 * Retrieves the bounding box of a dataset.
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273 */
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274 public Rectangle2D getBoundingBox(PolygonDataset dataset) {
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275 Rectangle2D bbox = null;
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276
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277 for (int i = 0, N = dataset.getSeriesCount(); i < N; i++) {
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278 Range domain = dataset.getSeries(i).getDomainBounds();
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279 Range range = dataset.getSeries(i).getRangeBounds();
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280
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281 double x = domain.getLowerBound();
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282 double y = range.getLowerBound();
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283 double w = Math.abs(domain.getUpperBound() - x);
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284 double h = Math.abs(range.getUpperBound() - y);
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285
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286 if (bbox == null) {
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287 bbox = new Rectangle2D.Double(x, y, w, h);
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288 }
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289 else {
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290 bbox.add(new Rectangle2D.Double(x, y, w, h));
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291 }
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292 }
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293
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294 return bbox;
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295 }
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296
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297 /**
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298 *
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299 * @return the bounds of a series.
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300 */
422
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301 public Rectangle2D getBounds(PolygonSeries series) {
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302
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303 Range domain = series.getDomainBounds();
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304 Range range = series.getRangeBounds();
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305
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306 return new Rectangle2D.Double(
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307 domain.getLowerBound(), range.getLowerBound(),
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308 domain.getUpperBound(), range.getUpperBound()
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309 );
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310 }
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311 }
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312 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org