Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/InfoGeneratorHelper2.java @ 7597:fca46ce8e4f5

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(issue1225) Implement Magic labels. There is now a new value in the chartsettings "Suggested Label" which is hidden in the property editor. A suggested label is the label that combines the label's of all processors that wrote data to an axis. This suggested label is set as the label when the user has not overwritten the label.
author Andre Heinecke <aheinecke@intevation.de>
date Mon, 25 Nov 2013 14:58:14 +0100
parents 74ebe5e7fa69
children e4606eae8ea5
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.exports;
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10
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11 import java.awt.geom.AffineTransform;
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12 import java.awt.geom.NoninvertibleTransformException;
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13 import java.awt.geom.Rectangle2D;
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14
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15 import java.util.Date;
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16
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17 import org.w3c.dom.Document;
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18 import org.w3c.dom.Element;
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19
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20 import org.apache.log4j.Logger;
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21
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22 import org.jfree.chart.ChartRenderingInfo;
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23 import org.jfree.chart.JFreeChart;
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24 import org.jfree.chart.axis.DateAxis;
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25 import org.jfree.chart.axis.NumberAxis;
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26 import org.jfree.chart.axis.ValueAxis;
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27 import org.jfree.chart.plot.XYPlot;
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28 import org.jfree.data.Range;
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29 import org.jfree.data.xy.XYDataset;
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30
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31 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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32 import org.dive4elements.artifacts.common.utils.XMLUtils;
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33 import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
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34
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35 import org.dive4elements.river.jfree.Bounds;
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36
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37
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38 /**
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39 * This class helps generating chart info documents.
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40 */
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41 public class InfoGeneratorHelper2 {
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42
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43 /** Private logging instance. */
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44 private static final Logger logger =
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45 Logger.getLogger(InfoGeneratorHelper2.class);
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46
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47 protected ChartGenerator2 generator;
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48
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49 public InfoGeneratorHelper2(ChartGenerator2 generator) {
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50 this.generator = generator;
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51 }
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52
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53 /**
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54 * Triggers the creation of the chart info document.
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55 *
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56 * @param chart The JFreeChart chart.
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57 * @param info An info object that has been created while chart creation.
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58 *
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59 * @return the info document.
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60 */
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61 public Document createInfoDocument(
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62 JFreeChart chart,
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63 ChartRenderingInfo info)
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64 {
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65 logger.debug("InfoGeneratorHelper.createInfoDocument");
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66
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67 Document doc = XMLUtils.newDocument();
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68
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69 ElementCreator cr = new ElementCreator(
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70 doc,
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71 ArtifactNamespaceContext.NAMESPACE_URI,
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72 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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73
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74 Element chartinfo = cr.create("chartinfo");
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75
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76 chartinfo.appendChild(createAxesElements(cr, chart));
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77 chartinfo.appendChild(createTransformationElements(cr, chart, info));
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78
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79 doc.appendChild(chartinfo);
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80
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81 return doc;
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82 }
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83
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84
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85 /**
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86 * This method create a axes element that contains all domain and range
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87 * axes of the given chart.
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88 *
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89 * @param cr The ElementCreator.
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90 * @param chart The chart that provides range information of its axes.
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91 *
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92 * @return an element with axes information.
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93 */
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94 protected Element createAxesElements(
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95 ElementCreator cr,
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96 JFreeChart chart)
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97 {
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98 logger.debug("InfoGeneratorHelper.createRangeElements");
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99
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100 Element axes = cr.create("axes");
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101
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102 XYPlot plot = (XYPlot) chart.getPlot();
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103
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104 int dAxisCount = plot.getDomainAxisCount();
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105 for (int i = 0; i < dAxisCount; i++) {
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106 ValueAxis axis = plot.getDomainAxis(i);
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107 XYDataset data = plot.getDataset(i);
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108
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109 if (axis != null) {
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110 Element e = createAxisElement(cr, axis, data, "domain", i);
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111 axes.appendChild(e);
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112 }
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113 }
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114
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115 int rAxisCount = plot.getRangeAxisCount();
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116 for (int i = 0; i < rAxisCount; i++) {
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117 ValueAxis axis = plot.getRangeAxis(i);
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118 XYDataset data = plot.getDataset(i);
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119
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120 if (axis == null || data == null) {
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121 logger.warn("Axis or dataset is empty at pos: " + i);
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122 continue;
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123 }
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124
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125 Element e = createAxisElement(cr, axis, data, "range", i);
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126 axes.appendChild(e);
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127 }
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128
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129 return axes;
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130 }
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131
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132
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133 /**
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134 * This method create a axis element for a given <i>axis</i> and
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135 * <i>type</i>. Type can be one of 'domain' or 'range'.
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136 *
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137 * @param cr The ElementCreator
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138 * @param axis The axis that provides range information.
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139 * @param dataset The dataset for min/max determination.
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140 * @param type The axis type ('domain' or 'range').
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141 * @param pos The position in the chart.
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142 *
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143 * @return An element that contains range information of a given axis.
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144 */
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145 protected Element createAxisElement(
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146 ElementCreator cr,
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147 ValueAxis axis,
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148 XYDataset dataset,
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149 String type,
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150 int pos)
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151 {
1944
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152 logger.debug("createAxisElement " + pos);
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153 logger.debug("Axis is from type: " + axis.getClass());
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154
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155 Element e = cr.create(type);
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156 cr.addAttr(e, "pos", String.valueOf(pos), true);
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157
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158 if (axis instanceof DateAxis) {
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159 prepareDateAxisElement(
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160 e, cr, (DateAxis) axis, dataset, type, pos);
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161 }
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162 else {
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163 prepareNumberAxisElement(
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164 e, cr, (NumberAxis) axis, dataset, type, pos);
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165 }
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166
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167 return e;
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168 }
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169
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170
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171 protected Element prepareNumberAxisElement(
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172 Element e,
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173 ElementCreator cr,
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174 NumberAxis axis,
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175 XYDataset dataset,
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176 String type,
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177 int pos
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178 ) {
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179 Range range = axis.getRange();
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180
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181 cr.addAttr(e, "from", String.valueOf(range.getLowerBound()), true);
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182 cr.addAttr(e, "to", String.valueOf(range.getUpperBound()), true);
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183 cr.addAttr(e, "axistype", "number", true);
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184
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185 Range[] rs = generator.getRangesForAxis(pos);
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186 Range r = null;
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187
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188 if (type.equals("range")) {
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189 r = rs[1];
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190 }
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191 else {
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192 r = rs[0];
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193 }
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194
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195 cr.addAttr(e, "min", String.valueOf(r.getLowerBound()), true);
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196 cr.addAttr(e, "max", String.valueOf(r.getUpperBound()), true);
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197
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198 return e;
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199 }
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200
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201
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202 protected Element prepareDateAxisElement(
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203 Element e,
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204 ElementCreator cr,
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205 DateAxis axis,
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206 XYDataset dataset,
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207 String type,
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208 int pos
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209 ) {
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210 Date from = axis.getMinimumDate();
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211 Date to = axis.getMaximumDate();
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212
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213 Bounds bounds = null;
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214 if (type.equals("range")) {
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215 bounds = generator.getYBounds(pos);
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216 }
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217 else {
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218 bounds = generator.getXBounds(pos);
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219 }
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220
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221 cr.addAttr(e, "axistype", "date", true);
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222 cr.addAttr(e, "from", String.valueOf(from.getTime()), true);
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223 cr.addAttr(e, "to", String.valueOf(to.getTime()), true);
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224
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225 cr.addAttr(e, "min", bounds.getLower().toString(), true);
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226 cr.addAttr(e, "max", bounds.getUpper().toString(), true);
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227
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228 return e;
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229 }
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230
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231
659
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232 /**
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233 * This method appends the values of a transformation matrix to transform
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234 * image pixel coordinates into chart coordinates.
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235 *
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236 * @param cr The ElementCreator.
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237 * @param chart The chart object.
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238 * @param info The ChartRenderingInfo that is filled while chart creation.
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239 *
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240 * @return an element that contains one or more transformation matrix.
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241 */
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242 protected Element createTransformationElements(
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243 ElementCreator cr,
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244 JFreeChart chart,
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245 ChartRenderingInfo info)
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246 {
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247 logger.debug("InfoGeneratorHelper.createTransformationElements");
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248
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249 Element tf = cr.create("transformation-matrix");
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250
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251 Rectangle2D dataArea = info.getPlotInfo().getDataArea();
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252
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253 XYPlot plot = (XYPlot) chart.getPlot();
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254 ValueAxis xAxis = plot.getDomainAxis();
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255
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256 if (xAxis == null) {
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257 logger.error("There is no x axis in the chart!");
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258 return null;
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259 }
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260
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261 for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) {
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262 ValueAxis yAxis = plot.getRangeAxis(i);
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263
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264 if (yAxis == null) {
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265 logger.warn("No y axis at pos " + i + " existing.");
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266 continue;
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267 }
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268
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269 Element matrix = createTransformationElement(
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270 cr, xAxis, yAxis, dataArea, i);
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271
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272 tf.appendChild(matrix);
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273 }
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274
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275 return tf;
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276 }
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277
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278
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279 /**
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280 * Creates an element that contains values used to transform coordinates
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281 * of a coordinate system A into a coordinate system B.
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282 *
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283 * @param cr The ElementCreator.
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284 * @param xAxis The x axis of the target coordinate system.
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285 * @param yAxis The y axis of the target coordinate system.
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286 * @param dataArea The pixel coordinates of the chart image.
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287 * @param pos The dataset position.
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288 *
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289 * @return an element that contains transformation matrix values.
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290 */
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291 protected Element createTransformationElement(
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292 ElementCreator cr,
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293 ValueAxis xAxis,
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294 ValueAxis yAxis,
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295 Rectangle2D dataArea,
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296 int pos)
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297 {
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298 double[] tm = createTransformationMatrix(dataArea, xAxis, yAxis);
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299
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300 Element matrix = cr.create("matrix");
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301
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302 cr.addAttr(matrix, "pos", String.valueOf(pos), true);
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303 cr.addAttr(matrix, "sx", String.valueOf(tm[0]), true);
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304 cr.addAttr(matrix, "sy", String.valueOf(tm[1]), true);
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305 cr.addAttr(matrix, "tx", String.valueOf(tm[2]), true);
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306 cr.addAttr(matrix, "ty", String.valueOf(tm[3]), true);
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307
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308 if (xAxis instanceof DateAxis) {
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309 cr.addAttr(matrix, "xtype", "date", true);
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310 }
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311 else {
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312 cr.addAttr(matrix, "xtype", "number", true);
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313 }
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314
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315 if (yAxis instanceof DateAxis) {
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316 cr.addAttr(matrix, "ytype", "date", true);
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317 }
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318 else {
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319 cr.addAttr(matrix, "ytype", "number", true);
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320 }
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321
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322 return matrix;
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323 }
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324
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325
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326 /**
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327 * This method determines a transformation matrix to transform pixel
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328 * coordinates of the chart image into chart coordinates.
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329 *
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330 * @param dataArea The rectangle that contains the data points of the chart.
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331 * @param xAxis The x axis.
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332 * @param yAxis The y axis.
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333 *
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334 * @return a double array as follows: [sx, sy, tx, ty].
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335 */
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336 protected static double[] createTransformationMatrix(
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337 Rectangle2D dataArea,
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338 ValueAxis xAxis,
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339 ValueAxis yAxis)
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340 {
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341 logger.debug("InfoGeneratorHelper.createTransformationMatrix");
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342
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343 double offsetX = dataArea.getX();
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344 double width = dataArea.getWidth();
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345 double offsetY = dataArea.getY();
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346 double height = dataArea.getHeight();
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347
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348 Range xRange = getRangeFromAxis(xAxis);
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349 Range yRange = getRangeFromAxis(yAxis);
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350
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351 double lowerX = xRange.getLowerBound();
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352 double upperX = xRange.getUpperBound();
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353 double lowerY = yRange.getLowerBound();
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354 double upperY = yRange.getUpperBound();
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355
648
d4c4fefb095b The matrix that is used to transform chart image coordinates into chart coordinates supports inverted x-axis now.
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356 if (xAxis.isInverted()) {
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357 logger.info("X-Axis is inverted!");
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358
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359 double tmp = upperX;
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360 upperX = lowerX;
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361 lowerX = tmp;
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362 }
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363
647
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364 double dMoveX = upperX - lowerX;
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365 double fMoveX = width * lowerX;
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366 double dMoveY = lowerY - upperY;
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367 double fMoveY = height * upperY;
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368
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369 AffineTransform t1 = AffineTransform.getTranslateInstance(
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370 offsetX - ( fMoveX / dMoveX ),
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371 offsetY - ( fMoveY / dMoveY ) );
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372
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373 AffineTransform t2 = AffineTransform.getScaleInstance(
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374 width / (upperX - lowerX),
bb484489d3df Introduced a new output generators for creating chart info documents.
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375 height / (lowerY - upperY));
bb484489d3df Introduced a new output generators for creating chart info documents.
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376
bb484489d3df Introduced a new output generators for creating chart info documents.
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377 t1.concatenate(t2);
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378
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379 try {
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380 t1.invert();
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381
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382 double[] c = new double[6];
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383 t1.getMatrix(c);
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384
bb484489d3df Introduced a new output generators for creating chart info documents.
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385 return new double[] { c[0], c[3], c[4], c[5] };
bb484489d3df Introduced a new output generators for creating chart info documents.
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386 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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387 catch (NoninvertibleTransformException e) {
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388 // do nothing
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389 logger.warn("Matrix is not invertible.");
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390 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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391
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392 return new double[] { 1d, 1d, 0d, 0d };
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393 }
2273
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
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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parents: 2261
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395
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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396 protected static Range getRangeFromAxis(ValueAxis axis) {
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397 if (axis instanceof DateAxis) {
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398 DateAxis dAxis = (DateAxis) axis;
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399 Date min = dAxis.getMinimumDate();
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parents: 2261
diff changeset
400 Date max = dAxis.getMaximumDate();
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parents: 2261
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401
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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diff changeset
402 return new Range(min.getTime(), max.getTime());
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parents: 2261
diff changeset
403 }
7b8d59436be3 Set proper bounds for date axes in the chart info document; tell the transformation matrix which type it is (date/number).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2261
diff changeset
404 else {
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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parents: 2261
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405 return axis.getRange();
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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parents: 2261
diff changeset
406 }
7b8d59436be3 Set proper bounds for date axes in the chart info document; tell the transformation matrix which type it is (date/number).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2261
diff changeset
407 }
647
bb484489d3df Introduced a new output generators for creating chart info documents.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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408 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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409 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org