Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/InfoGeneratorHelper.java @ 5838:5aa05a7a34b7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Rename modules to more fitting names.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 15:23:37 +0200
parents flys-artifacts/src/main/java/org/dive4elements/river/exports/InfoGeneratorHelper.java@bd047b71ab37
children 4897a58c8746
rev   line source
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1 package org.dive4elements.river.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 java.util.Date;
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8
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9 import org.w3c.dom.Document;
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10 import org.w3c.dom.Element;
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11
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12 import org.apache.log4j.Logger;
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13
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14 import org.jfree.chart.ChartRenderingInfo;
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15 import org.jfree.chart.JFreeChart;
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16 import org.jfree.chart.axis.DateAxis;
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17 import org.jfree.chart.axis.NumberAxis;
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18 import org.jfree.chart.axis.ValueAxis;
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19 import org.jfree.chart.plot.XYPlot;
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20 import org.jfree.data.Range;
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21 import org.jfree.data.xy.XYDataset;
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22
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23 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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24 import org.dive4elements.artifacts.common.utils.XMLUtils;
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25 import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
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26
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27 import org.dive4elements.river.jfree.Bounds;
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28
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29
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30 /**
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31 * This class helps generating chart info documents.
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32 *
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33 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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34 */
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35 public class InfoGeneratorHelper {
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36
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37 /** Private logging instance. */
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38 private static final Logger logger =
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39 Logger.getLogger(InfoGeneratorHelper.class);
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40
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41 protected ChartGenerator generator;
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43
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44 public InfoGeneratorHelper(ChartGenerator generator) {
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45 this.generator = generator;
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46 }
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47
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48
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49 /**
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50 * Triggers the creation of the chart info document.
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51 *
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52 * @param chart The JFreeChart chart.
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53 * @param info An info object that has been created while chart creation.
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54 *
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55 * @return the info document.
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56 */
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57 public Document createInfoDocument(
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58 JFreeChart chart,
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59 ChartRenderingInfo info)
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60 {
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61 logger.debug("InfoGeneratorHelper.createInfoDocument");
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62
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63 Document doc = XMLUtils.newDocument();
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64
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65 ElementCreator cr = new ElementCreator(
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66 doc,
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67 ArtifactNamespaceContext.NAMESPACE_URI,
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68 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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69
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70 Element chartinfo = cr.create("chartinfo");
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71
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72 chartinfo.appendChild(createAxesElements(cr, chart));
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73 chartinfo.appendChild(createTransformationElements(cr, chart, info));
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74
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75 doc.appendChild(chartinfo);
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76
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77 return doc;
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78 }
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79
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80
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81 /**
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82 * This method create a axes element that contains all domain and range
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83 * axes of the given chart.
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84 *
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85 * @param cr The ElementCreator.
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86 * @param chart The chart that provides range information of its axes.
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87 *
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88 * @return an element with axes information.
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89 */
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90 protected Element createAxesElements(
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91 ElementCreator cr,
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92 JFreeChart chart)
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93 {
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94 logger.debug("InfoGeneratorHelper.createRangeElements");
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95
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96 Element axes = cr.create("axes");
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97
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98 XYPlot plot = (XYPlot) chart.getPlot();
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99
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100 int dAxisCount = plot.getDomainAxisCount();
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101 for (int i = 0; i < dAxisCount; i++) {
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102 ValueAxis axis = plot.getDomainAxis(i);
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103 XYDataset data = plot.getDataset(i);
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104
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105 if (axis != null) {
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106 Element e = createAxisElement(cr, axis, data, "domain", i);
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107 axes.appendChild(e);
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108 }
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109 }
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110
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111 int rAxisCount = plot.getRangeAxisCount();
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112 for (int i = 0; i < rAxisCount; i++) {
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113 ValueAxis axis = plot.getRangeAxis(i);
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114 XYDataset data = plot.getDataset(i);
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115
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116 if (axis == null || data == null) {
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117 logger.warn("Axis or dataset is empty at pos: " + i);
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118 continue;
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119 }
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120
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121 Element e = createAxisElement(cr, axis, data, "range", i);
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122 axes.appendChild(e);
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123 }
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124
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125 return axes;
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126 }
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127
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128
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129 /**
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130 * This method create a axis element for a given <i>axis</i> and
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131 * <i>type</i>. Type can be one of 'domain' or 'range'.
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132 *
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133 * @param cr The ElementCreator
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134 * @param axis The axis that provides range information.
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135 * @param dataset The dataset for min/max determination.
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136 * @param type The axis type ('domain' or 'range').
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137 * @param pos The position in the chart.
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138 *
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139 * @return An element that contains range information of a given axis.
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140 */
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141 protected Element createAxisElement(
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142 ElementCreator cr,
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143 ValueAxis axis,
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144 XYDataset dataset,
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145 String type,
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146 int pos)
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147 {
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148 logger.debug("createAxisElement " + pos);
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149 logger.debug("Axis is from type: " + axis.getClass());
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150
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151 Element e = cr.create(type);
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152 cr.addAttr(e, "pos", String.valueOf(pos), true);
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153
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154 if (axis instanceof DateAxis) {
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155 prepareDateAxisElement(
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156 e, cr, (DateAxis) axis, dataset, type, pos);
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157 }
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158 else {
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159 prepareNumberAxisElement(
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160 e, cr, (NumberAxis) axis, dataset, type, pos);
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161 }
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162
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163 return e;
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164 }
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165
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166
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167 protected Element prepareNumberAxisElement(
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168 Element e,
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169 ElementCreator cr,
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170 NumberAxis axis,
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171 XYDataset dataset,
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172 String type,
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173 int pos
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174 ) {
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175 Range range = axis.getRange();
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176
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177 cr.addAttr(e, "from", String.valueOf(range.getLowerBound()), true);
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178 cr.addAttr(e, "to", String.valueOf(range.getUpperBound()), true);
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179 cr.addAttr(e, "axistype", "number", true);
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180
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181 Range[] rs = generator.getRangesForAxis(pos);
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182 Range r = null;
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183
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184 if (type.equals("range")) {
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185 r = rs[1];
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186 }
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187 else {
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188 r = rs[0];
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189 }
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190
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191 cr.addAttr(e, "min", String.valueOf(r.getLowerBound()), true);
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192 cr.addAttr(e, "max", String.valueOf(r.getUpperBound()), true);
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193
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194 return e;
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195 }
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196
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197
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198 protected Element prepareDateAxisElement(
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199 Element e,
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200 ElementCreator cr,
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201 DateAxis axis,
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202 XYDataset dataset,
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203 String type,
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204 int pos
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205 ) {
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206 Date from = axis.getMinimumDate();
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207 Date to = axis.getMaximumDate();
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208
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209 Bounds bounds = null;
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210 if (type.equals("range")) {
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211 bounds = generator.getYBounds(pos);
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212 }
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213 else {
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214 bounds = generator.getXBounds(pos);
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215 }
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216
2273
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217 cr.addAttr(e, "axistype", "date", true);
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218 cr.addAttr(e, "from", String.valueOf(from.getTime()), true);
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219 cr.addAttr(e, "to", String.valueOf(to.getTime()), true);
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220
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221 cr.addAttr(e, "min", bounds.getLower().toString(), true);
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222 cr.addAttr(e, "max", bounds.getUpper().toString(), true);
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223
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224 return e;
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225 }
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226
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227
659
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228 /**
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229 * This method appends the values of a transformation matrix to transform
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230 * image pixel coordinates into chart coordinates.
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231 *
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232 * @param cr The ElementCreator.
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233 * @param chart The chart object.
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234 * @param info The ChartRenderingInfo that is filled while chart creation.
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235 *
bb484489d3df Introduced a new output generators for creating chart info documents.
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236 * @return an element that contains one or more transformation matrix.
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237 */
673
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238 protected Element createTransformationElements(
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239 ElementCreator cr,
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240 JFreeChart chart,
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241 ChartRenderingInfo info)
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242 {
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243 logger.debug("InfoGeneratorHelper.createTransformationElements");
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244
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245 Element tf = cr.create("transformation-matrix");
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246
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247 Rectangle2D dataArea = info.getPlotInfo().getDataArea();
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248
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249 XYPlot plot = (XYPlot) chart.getPlot();
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250 ValueAxis xAxis = plot.getDomainAxis();
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251
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252 if (xAxis == null) {
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253 logger.error("There is no x axis in the chart!");
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254 return null;
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255 }
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256
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257 for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) {
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258 ValueAxis yAxis = plot.getRangeAxis(i);
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259
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260 if (yAxis == null) {
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261 logger.warn("No y axis at pos " + i + " existing.");
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262 continue;
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263 }
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264
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265 Element matrix = createTransformationElement(
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266 cr, xAxis, yAxis, dataArea, i);
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267
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268 tf.appendChild(matrix);
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269 }
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270
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271 return tf;
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272 }
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273
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274
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275 /**
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276 * Creates an element that contains values used to transform coordinates
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277 * of a coordinate system A into a coordinate system B.
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278 *
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279 * @param cr The ElementCreator.
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280 * @param xAxis The x axis of the target coordinate system.
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281 * @param yAxis The y axis of the target coordinate system.
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282 * @param dataArea The pixel coordinates of the chart image.
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283 * @param pos The dataset position.
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284 *
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285 * @return an element that contains transformation matrix values.
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286 */
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287 protected Element createTransformationElement(
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288 ElementCreator cr,
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289 ValueAxis xAxis,
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290 ValueAxis yAxis,
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291 Rectangle2D dataArea,
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292 int pos)
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293 {
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294 double[] tm = createTransformationMatrix(dataArea, xAxis, yAxis);
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295
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296 Element matrix = cr.create("matrix");
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297
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298 cr.addAttr(matrix, "pos", String.valueOf(pos), true);
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299 cr.addAttr(matrix, "sx", String.valueOf(tm[0]), true);
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300 cr.addAttr(matrix, "sy", String.valueOf(tm[1]), true);
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301 cr.addAttr(matrix, "tx", String.valueOf(tm[2]), true);
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302 cr.addAttr(matrix, "ty", String.valueOf(tm[3]), true);
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303
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304 if (xAxis instanceof DateAxis) {
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305 cr.addAttr(matrix, "xtype", "date", true);
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306 }
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307 else {
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308 cr.addAttr(matrix, "xtype", "number", true);
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309 }
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310
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311 if (yAxis instanceof DateAxis) {
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312 cr.addAttr(matrix, "ytype", "date", true);
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313 }
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314 else {
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315 cr.addAttr(matrix, "ytype", "number", true);
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316 }
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317
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318 return matrix;
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319 }
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320
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321
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322 /**
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323 * This method determines a transformation matrix to transform pixel
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324 * coordinates of the chart image into chart coordinates.
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325 *
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326 * @param dataArea The rectangle that contains the data points of the chart.
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327 * @param xAxis The x axis.
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328 * @param yAxis The y axis.
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329 *
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330 * @return a double array as follows: [sx, sy, tx, ty].
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331 */
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332 protected static double[] createTransformationMatrix(
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333 Rectangle2D dataArea,
648
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334 ValueAxis xAxis,
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335 ValueAxis yAxis)
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336 {
648
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337 logger.debug("InfoGeneratorHelper.createTransformationMatrix");
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338
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339 double offsetX = dataArea.getX();
657
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340 double width = dataArea.getWidth();
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341 double offsetY = dataArea.getY();
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342 double height = dataArea.getHeight();
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343
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344 Range xRange = getRangeFromAxis(xAxis);
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345 Range yRange = getRangeFromAxis(yAxis);
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346
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347 double lowerX = xRange.getLowerBound();
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348 double upperX = xRange.getUpperBound();
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349 double lowerY = yRange.getLowerBound();
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350 double upperY = yRange.getUpperBound();
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351
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352 if (xAxis.isInverted()) {
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353 logger.info("X-Axis is inverted!");
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354
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355 double tmp = upperX;
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356 upperX = lowerX;
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357 lowerX = tmp;
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358 }
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359
647
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360 double dMoveX = upperX - lowerX;
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361 double fMoveX = width * lowerX;
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362 double dMoveY = lowerY - upperY;
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363 double fMoveY = height * upperY;
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364
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365 AffineTransform t1 = AffineTransform.getTranslateInstance(
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366 offsetX - ( fMoveX / dMoveX ),
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367 offsetY - ( fMoveY / dMoveY ) );
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368
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369 AffineTransform t2 = AffineTransform.getScaleInstance(
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370 width / (upperX - lowerX),
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371 height / (lowerY - upperY));
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372
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373 t1.concatenate(t2);
bb484489d3df Introduced a new output generators for creating chart info documents.
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374
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375 try {
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376 t1.invert();
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377
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378 double[] c = new double[6];
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379 t1.getMatrix(c);
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380
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381 return new double[] { c[0], c[3], c[4], c[5] };
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382 }
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383 catch (NoninvertibleTransformException e) {
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384 // do nothing
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385 logger.warn("Matrix is not invertible.");
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386 }
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387
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388 return new double[] { 1d, 1d, 0d, 0d };
bb484489d3df Introduced a new output generators for creating chart info documents.
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389 }
2273
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390
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391
7b8d59436be3 Set proper bounds for date axes in the chart info document; tell the transformation matrix which type it is (date/number).
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392 protected static Range getRangeFromAxis(ValueAxis axis) {
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393 if (axis instanceof DateAxis) {
7b8d59436be3 Set proper bounds for date axes in the chart info document; tell the transformation matrix which type it is (date/number).
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394 DateAxis dAxis = (DateAxis) axis;
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395 Date min = dAxis.getMinimumDate();
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396 Date max = dAxis.getMaximumDate();
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397
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398 return new Range(min.getTime(), max.getTime());
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parents: 2261
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399 }
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400 else {
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401 return axis.getRange();
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402 }
7b8d59436be3 Set proper bounds for date axes in the chart info document; tell the transformation matrix which type it is (date/number).
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403 }
647
bb484489d3df Introduced a new output generators for creating chart info documents.
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404 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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405 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org