Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/InfoGeneratorHelper.java @ 2261:6aeb71517136

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Registered an Info generator for historical discharge curves; made some adaptions in XYChartGenerator, ChartGenerator and TimeseriesChartGenerator. flys-artifacts/trunk@3916 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 06 Feb 2012 11:14:33 +0000
parents 21a4d2c677a1
children 7b8d59436be3
rev   line source
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1 package de.intevation.flys.exports;
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2
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3 import java.awt.geom.AffineTransform;
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4 import java.awt.geom.NoninvertibleTransformException;
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5 import java.awt.geom.Rectangle2D;
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6
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7 import org.w3c.dom.Document;
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8 import org.w3c.dom.Element;
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9
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10 import org.apache.log4j.Logger;
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11
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12 import org.jfree.chart.ChartRenderingInfo;
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13 import org.jfree.chart.JFreeChart;
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14 import org.jfree.chart.axis.DateAxis;
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15 import org.jfree.chart.axis.ValueAxis;
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16 import org.jfree.chart.plot.XYPlot;
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17 import org.jfree.data.Range;
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18 import org.jfree.data.xy.XYDataset;
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19
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20 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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21 import de.intevation.artifacts.common.utils.XMLUtils;
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22 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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23
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24
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25 /**
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26 * This class helps generating chart info documents.
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27 *
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28 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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29 */
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30 public class InfoGeneratorHelper {
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31
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32 private static final Logger logger =
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33 Logger.getLogger(InfoGeneratorHelper.class);
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34
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35
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36 protected ChartGenerator generator;
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37
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38
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39 public InfoGeneratorHelper(ChartGenerator generator) {
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40 this.generator = generator;
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41 }
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42
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43
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44 /**
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45 * Triggers the creation of the chart info document.
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46 *
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47 * @param chart The JFreeChart chart.
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48 * @param info An info object that has been created while chart creation.
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49 *
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50 * @return the info document.
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51 */
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52 public Document createInfoDocument(
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53 JFreeChart chart,
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54 ChartRenderingInfo info)
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55 {
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56 logger.debug("InfoGeneratorHelper.createInfoDocument");
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57
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58 Document doc = XMLUtils.newDocument();
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59
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60 ElementCreator cr = new ElementCreator(
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61 doc,
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62 ArtifactNamespaceContext.NAMESPACE_URI,
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63 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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64
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65 Element chartinfo = cr.create("chartinfo");
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66
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67 chartinfo.appendChild(createAxesElements(cr, chart));
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68 chartinfo.appendChild(createTransformationElements(cr, chart, info));
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69
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70 doc.appendChild(chartinfo);
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71
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72 return doc;
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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 * This method create a axes element that contains all domain and range
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78 * axes of the given chart.
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79 *
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80 * @param cr The ElementCreator.
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81 * @param chart The chart that provides range information of its axes.
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82 *
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83 * @return an element with axes information.
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84 */
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85 protected Element createAxesElements(
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86 ElementCreator cr,
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87 JFreeChart chart)
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88 {
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89 logger.debug("InfoGeneratorHelper.createRangeElements");
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90
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91 Element axes = cr.create("axes");
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92
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93 XYPlot plot = (XYPlot) chart.getPlot();
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94
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95 int dAxisCount = plot.getDomainAxisCount();
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96 for (int i = 0; i < dAxisCount; i++) {
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97 ValueAxis axis = plot.getDomainAxis(i);
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98 XYDataset data = plot.getDataset(i);
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99
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100 if (axis != null) {
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101 Element e = createAxisElement(cr, axis, data, "domain", i);
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102 axes.appendChild(e);
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103 }
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104 }
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105
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106 int rAxisCount = plot.getRangeAxisCount();
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107 for (int i = 0; i < rAxisCount; i++) {
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108 ValueAxis axis = plot.getRangeAxis(i);
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109 XYDataset data = plot.getDataset(i);
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110
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111 if (axis == null || data == null) {
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112 logger.warn("Axis or dataset is empty at pos: " + i);
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113 continue;
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114 }
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115
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116 Element e = createAxisElement(cr, axis, data, "range", i);
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117 axes.appendChild(e);
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118 }
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119
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120 return axes;
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121 }
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122
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123
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124 /**
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125 * This method create a axis element for a given <i>axis</i> and
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126 * <i>type</i>. Type can be one of 'domain' or 'range'.
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127 *
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128 * @param cr The ElementCreator
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129 * @param axis The axis that provides range information.
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130 * @param dataset The dataset for min/max determination.
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131 * @param type The axis type ('domain' or 'range').
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132 * @param pos The position in the chart.
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133 *
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134 * @return An element that contains range information of a given axis.
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135 */
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136 protected Element createAxisElement(
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137 ElementCreator cr,
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138 ValueAxis axis,
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139 XYDataset dataset,
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140 String type,
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141 int pos)
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142 {
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143 logger.debug("createAxisElement " + pos);
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144 Range range = axis.getRange();
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145
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146 Element e = cr.create(type);
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147 cr.addAttr(e, "pos", String.valueOf(pos), true);
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148 cr.addAttr(e, "from", String.valueOf(range.getLowerBound()), true);
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149 cr.addAttr(e, "to", String.valueOf(range.getUpperBound()), true);
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150
2261
6aeb71517136 Registered an Info generator for historical discharge curves; made some adaptions in XYChartGenerator, ChartGenerator and TimeseriesChartGenerator.
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151 logger.debug("Axis is from type: " + axis.getClass());
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152
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153 if (axis instanceof DateAxis) {
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154 logger.debug("Add axis type: date");
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155 cr.addAttr(e, "axistype", "date", true);
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156 }
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157 else {
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158 logger.debug("Add axis type: number");
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159 cr.addAttr(e, "axistype", "number", true);
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160 }
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161
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bdb05dc9b763 Bugfix: #353 Enabled chart's to be drawn with proper axes set even if no data is contained.
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162 //Range[] rs = generator.getRangesForDataset(dataset);
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163 Range[] rs = generator.getRangesForAxis(pos);
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164 Range r = null;
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165
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166 if (type.equals("range")) {
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167 r = rs[1];
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168 }
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169 else {
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170 r = rs[0];
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171 }
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172
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173 cr.addAttr(e, "min", String.valueOf(r.getLowerBound()), true);
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174 cr.addAttr(e, "max", String.valueOf(r.getUpperBound()), true);
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175
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176 return e;
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177 }
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178
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179
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180 /**
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181 * This method appends the values of a transformation matrix to transform
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182 * image pixel coordinates into chart coordinates.
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183 *
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184 * @param cr The ElementCreator.
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185 * @param chart The chart object.
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186 * @param info The ChartRenderingInfo that is filled while chart creation.
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187 *
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188 * @return an element that contains one or more transformation matrix.
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189 */
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190 protected Element createTransformationElements(
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191 ElementCreator cr,
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192 JFreeChart chart,
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193 ChartRenderingInfo info)
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194 {
673
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195 logger.debug("InfoGeneratorHelper.createTransformationElements");
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196
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197 Element tf = cr.create("transformation-matrix");
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198
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199 Rectangle2D dataArea = info.getPlotInfo().getDataArea();
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200
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201 XYPlot plot = (XYPlot) chart.getPlot();
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202 ValueAxis xAxis = plot.getDomainAxis();
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203
673
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204 if (xAxis == null) {
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205 logger.error("There is no x axis in the chart!");
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206 return null;
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207 }
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208
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209 for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) {
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210 ValueAxis yAxis = plot.getRangeAxis(i);
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211
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212 if (yAxis == null) {
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213 logger.warn("No y axis at pos " + i + " existing.");
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214 continue;
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215 }
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216
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217 Element matrix = createTransformationElement(
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218 cr, xAxis, yAxis, dataArea, i);
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219
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220 tf.appendChild(matrix);
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221 }
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222
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223 return tf;
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224 }
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225
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226
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227 /**
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228 * Creates an element that contains values used to transform coordinates
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229 * of a coordinate system A into a coordinate system B.
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230 *
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231 * @param cr The ElementCreator.
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232 * @param xAxis The x axis of the target coordinate system.
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233 * @param yAxis The y axis of the target coordinate system.
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234 * @param dataArea The pixel coordinates of the chart image.
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235 * @param pos The dataset position.
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236 *
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237 * @return an element that contains transformation matrix values.
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238 */
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239 protected Element createTransformationElement(
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240 ElementCreator cr,
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241 ValueAxis xAxis,
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242 ValueAxis yAxis,
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243 Rectangle2D dataArea,
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244 int pos)
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245 {
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246 double[] tm = createTransformationMatrix(dataArea, xAxis, yAxis);
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247
673
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248 Element matrix = cr.create("matrix");
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249
673
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250 cr.addAttr(matrix, "pos", String.valueOf(pos), true);
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251 cr.addAttr(matrix, "sx", String.valueOf(tm[0]), true);
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252 cr.addAttr(matrix, "sy", String.valueOf(tm[1]), true);
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253 cr.addAttr(matrix, "tx", String.valueOf(tm[2]), true);
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254 cr.addAttr(matrix, "ty", String.valueOf(tm[3]), true);
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255
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256 return matrix;
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257 }
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258
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259
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260 /**
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261 * This method determines a transformation matrix to transform pixel
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262 * coordinates of the chart image into chart coordinates.
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263 *
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264 * @param dataArea The rectangle that contains the data points of the chart.
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265 * @param xRange The x axis range.
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266 * @param yRange The y axis range.
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267 *
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268 * @return a double array as follows: [sx, sy, tx, ty].
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269 */
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270 protected static double[] createTransformationMatrix(
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271 Rectangle2D dataArea,
648
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272 ValueAxis xAxis,
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273 ValueAxis yAxis)
647
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274 {
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275 logger.debug("InfoGeneratorHelper.createTransformationMatrix");
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276
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277 double offsetX = dataArea.getX();
657
ac1399d325e9 Removed asymmetrical "- 1" from width calculation.
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278 double width = dataArea.getWidth();
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279 double offsetY = dataArea.getY();
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280 double height = dataArea.getHeight();
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281
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282 Range xRange = xAxis.getRange();
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283 Range yRange = yAxis.getRange();
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284
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285 double lowerX = xRange.getLowerBound();
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286 double upperX = xRange.getUpperBound();
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287 double lowerY = yRange.getLowerBound();
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288 double upperY = yRange.getUpperBound();
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289
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290 if (xAxis.isInverted()) {
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291 logger.info("X-Axis is inverted!");
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292
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293 double tmp = upperX;
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294 upperX = lowerX;
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295 lowerX = tmp;
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296 }
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297
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298 double dMoveX = upperX - lowerX;
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299 double fMoveX = width * lowerX;
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300 double dMoveY = lowerY - upperY;
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301 double fMoveY = height * upperY;
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302
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303 AffineTransform t1 = AffineTransform.getTranslateInstance(
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304 offsetX - ( fMoveX / dMoveX ),
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305 offsetY - ( fMoveY / dMoveY ) );
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306
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307 AffineTransform t2 = AffineTransform.getScaleInstance(
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308 width / (upperX - lowerX),
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309 height / (lowerY - upperY));
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310
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311 t1.concatenate(t2);
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312
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313 try {
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314 t1.invert();
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315
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316 double[] c = new double[6];
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317 t1.getMatrix(c);
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318
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319 return new double[] { c[0], c[3], c[4], c[5] };
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320 }
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321 catch (NoninvertibleTransformException e) {
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322 // do nothing
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323 logger.warn("Matrix is not invertible.");
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324 }
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325
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326 return new double[] { 1d, 1d, 0d, 0d };
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327 }
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328 }
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329 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org