Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/exports/InfoGeneratorHelper.java @ 7079:48e30e2c5db9 generator-refactoring
ChartGenerator2 can be used as ChartInfoGenerator, too.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Fri, 20 Sep 2013 17:00:59 +0200 |
parents | 9b52c501c57e |
children | 3dc740c51f9b |
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 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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42 */ |
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43 public class InfoGeneratorHelper { |
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44 |
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45 /** Private logging instance. */ |
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46 private static final Logger logger = |
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47 Logger.getLogger(InfoGeneratorHelper.class); |
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48 |
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49 protected ChartGenerator generator; |
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50 protected ChartGenerator2 generator2; |
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51 |
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52 |
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53 public InfoGeneratorHelper(ChartGenerator generator) { |
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54 this.generator = generator; |
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55 } |
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56 |
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57 public InfoGeneratorHelper(ChartGenerator2 generator) { |
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58 this.generator2 = generator2; |
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59 } |
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60 |
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61 |
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62 /** |
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63 * Triggers the creation of the chart info document. |
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64 * |
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65 * @param chart The JFreeChart chart. |
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66 * @param info An info object that has been created while chart creation. |
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67 * |
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68 * @return the info document. |
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69 */ |
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70 public Document createInfoDocument( |
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71 JFreeChart chart, |
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72 ChartRenderingInfo info) |
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73 { |
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74 logger.debug("InfoGeneratorHelper.createInfoDocument"); |
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75 |
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76 Document doc = XMLUtils.newDocument(); |
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77 |
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78 ElementCreator cr = new ElementCreator( |
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79 doc, |
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80 ArtifactNamespaceContext.NAMESPACE_URI, |
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81 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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82 |
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83 Element chartinfo = cr.create("chartinfo"); |
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84 |
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85 chartinfo.appendChild(createAxesElements(cr, chart)); |
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86 chartinfo.appendChild(createTransformationElements(cr, chart, info)); |
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87 |
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88 doc.appendChild(chartinfo); |
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89 |
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90 return doc; |
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91 } |
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92 |
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93 |
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94 /** |
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95 * This method create a axes element that contains all domain and range |
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96 * axes of the given chart. |
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97 * |
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98 * @param cr The ElementCreator. |
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99 * @param chart The chart that provides range information of its axes. |
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100 * |
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101 * @return an element with axes information. |
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102 */ |
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103 protected Element createAxesElements( |
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104 ElementCreator cr, |
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105 JFreeChart chart) |
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106 { |
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107 logger.debug("InfoGeneratorHelper.createRangeElements"); |
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108 |
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109 Element axes = cr.create("axes"); |
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110 |
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111 XYPlot plot = (XYPlot) chart.getPlot(); |
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112 |
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113 int dAxisCount = plot.getDomainAxisCount(); |
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114 for (int i = 0; i < dAxisCount; i++) { |
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115 ValueAxis axis = plot.getDomainAxis(i); |
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116 XYDataset data = plot.getDataset(i); |
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117 |
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118 if (axis != null) { |
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119 Element e = createAxisElement(cr, axis, data, "domain", i); |
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120 axes.appendChild(e); |
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121 } |
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122 } |
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123 |
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124 int rAxisCount = plot.getRangeAxisCount(); |
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125 for (int i = 0; i < rAxisCount; i++) { |
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126 ValueAxis axis = plot.getRangeAxis(i); |
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127 XYDataset data = plot.getDataset(i); |
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128 |
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129 if (axis == null || data == null) { |
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130 logger.warn("Axis or dataset is empty at pos: " + i); |
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131 continue; |
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132 } |
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133 |
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134 Element e = createAxisElement(cr, axis, data, "range", i); |
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135 axes.appendChild(e); |
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136 } |
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137 |
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138 return axes; |
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139 } |
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140 |
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141 |
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142 /** |
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143 * This method create a axis element for a given <i>axis</i> and |
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144 * <i>type</i>. Type can be one of 'domain' or 'range'. |
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145 * |
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146 * @param cr The ElementCreator |
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147 * @param axis The axis that provides range information. |
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148 * @param dataset The dataset for min/max determination. |
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149 * @param type The axis type ('domain' or 'range'). |
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150 * @param pos The position in the chart. |
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151 * |
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152 * @return An element that contains range information of a given axis. |
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153 */ |
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154 protected Element createAxisElement( |
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155 ElementCreator cr, |
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156 ValueAxis axis, |
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157 XYDataset dataset, |
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158 String type, |
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159 int pos) |
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160 { |
1944
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161 logger.debug("createAxisElement " + pos); |
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162 logger.debug("Axis is from type: " + axis.getClass()); |
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163 |
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164 Element e = cr.create(type); |
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165 cr.addAttr(e, "pos", String.valueOf(pos), true); |
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166 |
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167 if (axis instanceof DateAxis) { |
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168 prepareDateAxisElement( |
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169 e, cr, (DateAxis) axis, dataset, type, pos); |
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170 } |
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171 else { |
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172 prepareNumberAxisElement( |
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173 e, cr, (NumberAxis) axis, dataset, type, pos); |
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174 } |
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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 protected Element prepareNumberAxisElement( |
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181 Element e, |
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182 ElementCreator cr, |
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183 NumberAxis axis, |
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184 XYDataset dataset, |
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185 String type, |
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186 int pos |
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187 ) { |
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188 Range range = axis.getRange(); |
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189 |
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190 cr.addAttr(e, "from", String.valueOf(range.getLowerBound()), true); |
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191 cr.addAttr(e, "to", String.valueOf(range.getUpperBound()), true); |
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192 cr.addAttr(e, "axistype", "number", true); |
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193 |
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194 Range[] rs = generator2 == null ? generator.getRangesForAxis(pos) : generator2.getRangesForAxis(pos); |
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195 Range r = null; |
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196 |
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197 if (type.equals("range")) { |
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198 r = rs[1]; |
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199 } |
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200 else { |
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201 r = rs[0]; |
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202 } |
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203 |
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204 cr.addAttr(e, "min", String.valueOf(r.getLowerBound()), true); |
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205 cr.addAttr(e, "max", String.valueOf(r.getUpperBound()), true); |
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206 |
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207 return e; |
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208 } |
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209 |
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210 |
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211 protected Element prepareDateAxisElement( |
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212 Element e, |
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213 ElementCreator cr, |
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214 DateAxis axis, |
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215 XYDataset dataset, |
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216 String type, |
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217 int pos |
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218 ) { |
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219 Date from = axis.getMinimumDate(); |
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220 Date to = axis.getMaximumDate(); |
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221 |
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222 Bounds bounds = null; |
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223 if (type.equals("range")) { |
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224 bounds = generator2 == null ? generator.getYBounds(pos) : generator2.getYBounds(pos); |
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225 } |
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226 else { |
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227 bounds = generator2 == null ? generator.getXBounds(pos) : generator2.getXBounds(pos); |
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228 } |
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229 |
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230 cr.addAttr(e, "axistype", "date", true); |
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231 cr.addAttr(e, "from", String.valueOf(from.getTime()), true); |
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232 cr.addAttr(e, "to", String.valueOf(to.getTime()), true); |
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233 |
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234 cr.addAttr(e, "min", bounds.getLower().toString(), true); |
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235 cr.addAttr(e, "max", bounds.getUpper().toString(), true); |
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236 |
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237 return e; |
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238 } |
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239 |
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240 |
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241 /** |
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242 * This method appends the values of a transformation matrix to transform |
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243 * image pixel coordinates into chart coordinates. |
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244 * |
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245 * @param cr The ElementCreator. |
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246 * @param chart The chart object. |
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247 * @param info The ChartRenderingInfo that is filled while chart creation. |
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248 * |
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249 * @return an element that contains one or more transformation matrix. |
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250 */ |
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251 protected Element createTransformationElements( |
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252 ElementCreator cr, |
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253 JFreeChart chart, |
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254 ChartRenderingInfo info) |
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255 { |
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256 logger.debug("InfoGeneratorHelper.createTransformationElements"); |
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257 |
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258 Element tf = cr.create("transformation-matrix"); |
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259 |
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260 Rectangle2D dataArea = info.getPlotInfo().getDataArea(); |
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261 |
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262 XYPlot plot = (XYPlot) chart.getPlot(); |
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263 ValueAxis xAxis = plot.getDomainAxis(); |
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264 |
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265 if (xAxis == null) { |
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266 logger.error("There is no x axis in the chart!"); |
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267 return null; |
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268 } |
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269 |
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270 for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) { |
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271 ValueAxis yAxis = plot.getRangeAxis(i); |
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272 |
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273 if (yAxis == null) { |
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274 logger.warn("No y axis at pos " + i + " existing."); |
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275 continue; |
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276 } |
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277 |
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278 Element matrix = createTransformationElement( |
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279 cr, xAxis, yAxis, dataArea, i); |
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280 |
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281 tf.appendChild(matrix); |
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282 } |
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283 |
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284 return tf; |
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285 } |
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286 |
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287 |
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288 /** |
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289 * Creates an element that contains values used to transform coordinates |
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290 * of a coordinate system A into a coordinate system B. |
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291 * |
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292 * @param cr The ElementCreator. |
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293 * @param xAxis The x axis of the target coordinate system. |
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294 * @param yAxis The y axis of the target coordinate system. |
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295 * @param dataArea The pixel coordinates of the chart image. |
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296 * @param pos The dataset position. |
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297 * |
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298 * @return an element that contains transformation matrix values. |
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299 */ |
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300 protected Element createTransformationElement( |
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301 ElementCreator cr, |
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302 ValueAxis xAxis, |
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303 ValueAxis yAxis, |
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304 Rectangle2D dataArea, |
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305 int pos) |
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306 { |
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307 double[] tm = createTransformationMatrix(dataArea, xAxis, yAxis); |
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308 |
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309 Element matrix = cr.create("matrix"); |
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310 |
673
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311 cr.addAttr(matrix, "pos", String.valueOf(pos), true); |
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312 cr.addAttr(matrix, "sx", String.valueOf(tm[0]), true); |
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313 cr.addAttr(matrix, "sy", String.valueOf(tm[1]), true); |
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314 cr.addAttr(matrix, "tx", String.valueOf(tm[2]), true); |
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315 cr.addAttr(matrix, "ty", String.valueOf(tm[3]), true); |
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316 |
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317 if (xAxis instanceof DateAxis) { |
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318 cr.addAttr(matrix, "xtype", "date", true); |
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319 } |
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320 else { |
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321 cr.addAttr(matrix, "xtype", "number", true); |
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322 } |
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323 |
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324 if (yAxis instanceof DateAxis) { |
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325 cr.addAttr(matrix, "ytype", "date", true); |
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326 } |
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327 else { |
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328 cr.addAttr(matrix, "ytype", "number", true); |
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329 } |
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330 |
673
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331 return matrix; |
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332 } |
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333 |
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334 |
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335 /** |
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336 * This method determines a transformation matrix to transform pixel |
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337 * coordinates of the chart image into chart coordinates. |
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338 * |
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339 * @param dataArea The rectangle that contains the data points of the chart. |
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340 * @param xAxis The x axis. |
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341 * @param yAxis The y axis. |
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342 * |
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343 * @return a double array as follows: [sx, sy, tx, ty]. |
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344 */ |
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345 protected static double[] createTransformationMatrix( |
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346 Rectangle2D dataArea, |
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347 ValueAxis xAxis, |
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348 ValueAxis yAxis) |
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349 { |
648
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350 logger.debug("InfoGeneratorHelper.createTransformationMatrix"); |
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351 |
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352 double offsetX = dataArea.getX(); |
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353 double width = dataArea.getWidth(); |
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354 double offsetY = dataArea.getY(); |
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355 double height = dataArea.getHeight(); |
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356 |
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357 Range xRange = getRangeFromAxis(xAxis); |
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358 Range yRange = getRangeFromAxis(yAxis); |
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359 |
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360 double lowerX = xRange.getLowerBound(); |
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361 double upperX = xRange.getUpperBound(); |
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362 double lowerY = yRange.getLowerBound(); |
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363 double upperY = yRange.getUpperBound(); |
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364 |
648
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365 if (xAxis.isInverted()) { |
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366 logger.info("X-Axis is inverted!"); |
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367 |
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368 double tmp = upperX; |
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369 upperX = lowerX; |
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370 lowerX = tmp; |
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371 } |
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372 |
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373 double dMoveX = upperX - lowerX; |
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374 double fMoveX = width * lowerX; |
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375 double dMoveY = lowerY - upperY; |
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376 double fMoveY = height * upperY; |
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377 |
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378 AffineTransform t1 = AffineTransform.getTranslateInstance( |
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379 offsetX - ( fMoveX / dMoveX ), |
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380 offsetY - ( fMoveY / dMoveY ) ); |
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381 |
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382 AffineTransform t2 = AffineTransform.getScaleInstance( |
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383 width / (upperX - lowerX), |
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384 height / (lowerY - upperY)); |
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385 |
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386 t1.concatenate(t2); |
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387 |
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388 try { |
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389 t1.invert(); |
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390 |
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391 double[] c = new double[6]; |
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392 t1.getMatrix(c); |
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393 |
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394 return new double[] { c[0], c[3], c[4], c[5] }; |
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395 } |
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396 catch (NoninvertibleTransformException e) { |
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397 // do nothing |
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398 logger.warn("Matrix is not invertible."); |
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399 } |
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400 |
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401 return new double[] { 1d, 1d, 0d, 0d }; |
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402 } |
2273
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403 |
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404 |
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405 protected static Range getRangeFromAxis(ValueAxis axis) { |
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406 if (axis instanceof DateAxis) { |
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407 DateAxis dAxis = (DateAxis) axis; |
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408 Date min = dAxis.getMinimumDate(); |
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409 Date max = dAxis.getMaximumDate(); |
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410 |
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411 return new Range(min.getTime(), max.getTime()); |
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412 } |
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413 else { |
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414 return axis.getRange(); |
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415 } |
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416 } |
647
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417 } |
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418 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |