Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/InfoGeneratorHelper.java @ 4432:e8a4d2fd25cc

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Merged.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 07 Nov 2012 09:47:44 +0100
parents 4ac581062c40
children 5b8919ef601d
rev   line source
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bb484489d3df Introduced a new output generators for creating chart info documents.
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1 package de.intevation.flys.exports;
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2
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3 import java.awt.geom.AffineTransform;
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4 import java.awt.geom.NoninvertibleTransformException;
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5 import java.awt.geom.Rectangle2D;
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6
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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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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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d4c4fefb095b The matrix that is used to transform chart image coordinates into chart coordinates supports inverted x-axis now.
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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 de.intevation.artifacts.common.ArtifactNamespaceContext;
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24 import de.intevation.artifacts.common.utils.XMLUtils;
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25 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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26
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27 import de.intevation.flys.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 static final Logger logger =
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38 Logger.getLogger(InfoGeneratorHelper.class);
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39
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40
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41 protected ChartGenerator generator;
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42
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43
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6aeb71517136 Registered an Info generator for historical discharge curves; made some adaptions in XYChartGenerator, ChartGenerator and TimeseriesChartGenerator.
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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 // Debug me, issue842
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73 chartinfo.appendChild(createAxesElements(cr, chart));
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74 chartinfo.appendChild(createTransformationElements(cr, chart, info));
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75
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76 doc.appendChild(chartinfo);
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77
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78 return doc;
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79 }
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80
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81
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82 /**
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83 * This method create a axes element that contains all domain and range
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84 * axes of the given chart.
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85 *
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86 * @param cr The ElementCreator.
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87 * @param chart The chart that provides range information of its axes.
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88 *
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89 * @return an element with axes information.
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90 */
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91 protected Element createAxesElements(
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92 ElementCreator cr,
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93 JFreeChart chart)
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94 {
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95 logger.debug("InfoGeneratorHelper.createRangeElements");
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96
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97 Element axes = cr.create("axes");
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98
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99 XYPlot plot = (XYPlot) chart.getPlot();
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100
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101 int dAxisCount = plot.getDomainAxisCount();
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102 for (int i = 0; i < dAxisCount; i++) {
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103 ValueAxis axis = plot.getDomainAxis(i);
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104 XYDataset data = plot.getDataset(i);
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105
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106 if (axis != null) {
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107 Element e = createAxisElement(cr, axis, data, "domain", i);
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108 axes.appendChild(e);
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109 }
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110 }
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111
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112 int rAxisCount = plot.getRangeAxisCount();
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113 for (int i = 0; i < rAxisCount; i++) {
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114 ValueAxis axis = plot.getRangeAxis(i);
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115 XYDataset data = plot.getDataset(i);
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116
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117 if (axis == null || data == null) {
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118 logger.warn("Axis or dataset is empty at pos: " + i);
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119 continue;
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120 }
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121
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122 Element e = createAxisElement(cr, axis, data, "range", i);
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123 axes.appendChild(e);
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124 }
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125
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126 return axes;
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127 }
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128
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129
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130 /**
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131 * This method create a axis element for a given <i>axis</i> and
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132 * <i>type</i>. Type can be one of 'domain' or 'range'.
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133 *
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134 * @param cr The ElementCreator
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135 * @param axis The axis that provides range information.
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136 * @param dataset The dataset for min/max determination.
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137 * @param type The axis type ('domain' or 'range').
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138 * @param pos The position in the chart.
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139 *
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140 * @return An element that contains range information of a given axis.
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141 */
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142 protected Element createAxisElement(
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143 ElementCreator cr,
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144 ValueAxis axis,
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145 XYDataset dataset,
659
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146 String type,
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147 int pos)
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148 {
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149 logger.debug("createAxisElement " + pos);
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150 logger.debug("Axis is from type: " + axis.getClass());
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151
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152 Element e = cr.create(type);
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153 cr.addAttr(e, "pos", String.valueOf(pos), true);
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154
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155 if (axis instanceof DateAxis) {
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156 prepareDateAxisElement(
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157 e, cr, (DateAxis) axis, dataset, type, pos);
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158 }
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159 else {
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160 prepareNumberAxisElement(
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161 e, cr, (NumberAxis) axis, dataset, type, pos);
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162 }
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163
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164 return e;
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165 }
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166
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167
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168 protected Element prepareNumberAxisElement(
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169 Element e,
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170 ElementCreator cr,
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171 NumberAxis axis,
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172 XYDataset dataset,
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173 String type,
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174 int pos
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175 ) {
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176 Range range = axis.getRange();
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177
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178 cr.addAttr(e, "from", String.valueOf(range.getLowerBound()), true);
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179 cr.addAttr(e, "to", String.valueOf(range.getUpperBound()), true);
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180 cr.addAttr(e, "axistype", "number", true);
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181
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182 Range[] rs = generator.getRangesForAxis(pos);
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183 Range r = null;
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184
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185 if (type.equals("range")) {
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186 r = rs[1];
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187 }
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188 else {
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189 r = rs[0];
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190 }
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191
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192 cr.addAttr(e, "min", String.valueOf(r.getLowerBound()), true);
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193 cr.addAttr(e, "max", String.valueOf(r.getUpperBound()), true);
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194
659
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195 return e;
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196 }
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197
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198
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199 protected Element prepareDateAxisElement(
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200 Element e,
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201 ElementCreator cr,
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202 DateAxis axis,
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203 XYDataset dataset,
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204 String type,
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205 int pos
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206 ) {
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207 Date from = axis.getMinimumDate();
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208 Date to = axis.getMaximumDate();
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209
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210 Bounds bounds = null;
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211 if (type.equals("range")) {
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212 bounds = generator.getYBounds(pos);
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213 }
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214 else {
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215 bounds = generator.getXBounds(pos);
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216 }
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217
2273
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218 cr.addAttr(e, "axistype", "date", true);
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219 cr.addAttr(e, "from", String.valueOf(from.getTime()), true);
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220 cr.addAttr(e, "to", String.valueOf(to.getTime()), true);
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221
2330
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222 cr.addAttr(e, "min", bounds.getLower().toString(), true);
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223 cr.addAttr(e, "max", bounds.getUpper().toString(), true);
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224
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225 return e;
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226 }
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227
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228
659
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229 /**
647
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230 * This method appends the values of a transformation matrix to transform
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231 * image pixel coordinates into chart coordinates.
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232 *
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233 * @param cr The ElementCreator.
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234 * @param chart The chart object.
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235 * @param info The ChartRenderingInfo that is filled while chart creation.
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236 *
bb484489d3df Introduced a new output generators for creating chart info documents.
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237 * @return an element that contains one or more transformation matrix.
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238 */
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239 protected Element createTransformationElements(
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240 ElementCreator cr,
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241 JFreeChart chart,
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242 ChartRenderingInfo info)
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243 {
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244 logger.debug("InfoGeneratorHelper.createTransformationElements");
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245
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246 Element tf = cr.create("transformation-matrix");
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247
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248 Rectangle2D dataArea = info.getPlotInfo().getDataArea();
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249
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250 XYPlot plot = (XYPlot) chart.getPlot();
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251 ValueAxis xAxis = plot.getDomainAxis();
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252
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253 if (xAxis == null) {
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254 logger.error("There is no x axis in the chart!");
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255 return null;
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256 }
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257
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258 for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) {
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259 ValueAxis yAxis = plot.getRangeAxis(i);
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260
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261 if (yAxis == null) {
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262 logger.warn("No y axis at pos " + i + " existing.");
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263 continue;
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264 }
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265
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266 Element matrix = createTransformationElement(
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267 cr, xAxis, yAxis, dataArea, i);
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268
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269 tf.appendChild(matrix);
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270 }
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271
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272 return tf;
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273 }
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274
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275
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276 /**
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277 * Creates an element that contains values used to transform coordinates
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278 * of a coordinate system A into a coordinate system B.
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279 *
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280 * @param cr The ElementCreator.
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281 * @param xAxis The x axis of the target coordinate system.
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282 * @param yAxis The y axis of the target coordinate system.
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283 * @param dataArea The pixel coordinates of the chart image.
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284 * @param pos The dataset position.
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285 *
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286 * @return an element that contains transformation matrix values.
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287 */
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288 protected Element createTransformationElement(
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289 ElementCreator cr,
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290 ValueAxis xAxis,
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291 ValueAxis yAxis,
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292 Rectangle2D dataArea,
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293 int pos)
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294 {
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295 double[] tm = createTransformationMatrix(dataArea, xAxis, yAxis);
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296
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297 Element matrix = cr.create("matrix");
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298
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299 cr.addAttr(matrix, "pos", String.valueOf(pos), true);
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300 cr.addAttr(matrix, "sx", String.valueOf(tm[0]), true);
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301 cr.addAttr(matrix, "sy", String.valueOf(tm[1]), true);
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302 cr.addAttr(matrix, "tx", String.valueOf(tm[2]), true);
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303 cr.addAttr(matrix, "ty", String.valueOf(tm[3]), true);
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304
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305 if (xAxis instanceof DateAxis) {
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306 cr.addAttr(matrix, "xtype", "date", true);
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307 }
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308 else {
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309 cr.addAttr(matrix, "xtype", "number", true);
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310 }
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311
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312 if (yAxis instanceof DateAxis) {
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313 cr.addAttr(matrix, "ytype", "date", true);
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314 }
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315 else {
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316 cr.addAttr(matrix, "ytype", "number", true);
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317 }
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318
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319 return matrix;
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320 }
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321
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322
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323 /**
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324 * This method determines a transformation matrix to transform pixel
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325 * coordinates of the chart image into chart coordinates.
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326 *
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327 * @param dataArea The rectangle that contains the data points of the chart.
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328 * @param xAxis The x axis.
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329 * @param yAxis The y axis.
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330 *
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331 * @return a double array as follows: [sx, sy, tx, ty].
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332 */
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333 protected static double[] createTransformationMatrix(
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334 Rectangle2D dataArea,
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335 ValueAxis xAxis,
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336 ValueAxis yAxis)
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337 {
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338 logger.debug("InfoGeneratorHelper.createTransformationMatrix");
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339
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340 double offsetX = dataArea.getX();
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341 double width = dataArea.getWidth();
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342 double offsetY = dataArea.getY();
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343 double height = dataArea.getHeight();
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344
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345 Range xRange = getRangeFromAxis(xAxis);
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346 Range yRange = getRangeFromAxis(yAxis);
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347
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348 double lowerX = xRange.getLowerBound();
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349 double upperX = xRange.getUpperBound();
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350 double lowerY = yRange.getLowerBound();
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351 double upperY = yRange.getUpperBound();
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352
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353 if (xAxis.isInverted()) {
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354 logger.info("X-Axis is inverted!");
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355
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356 double tmp = upperX;
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357 upperX = lowerX;
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358 lowerX = tmp;
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359 }
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360
647
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361 double dMoveX = upperX - lowerX;
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362 double fMoveX = width * lowerX;
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363 double dMoveY = lowerY - upperY;
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364 double fMoveY = height * upperY;
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365
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366 AffineTransform t1 = AffineTransform.getTranslateInstance(
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367 offsetX - ( fMoveX / dMoveX ),
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368 offsetY - ( fMoveY / dMoveY ) );
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369
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370 AffineTransform t2 = AffineTransform.getScaleInstance(
bb484489d3df Introduced a new output generators for creating chart info documents.
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371 width / (upperX - lowerX),
bb484489d3df Introduced a new output generators for creating chart info documents.
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372 height / (lowerY - upperY));
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373
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374 t1.concatenate(t2);
bb484489d3df Introduced a new output generators for creating chart info documents.
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375
bb484489d3df Introduced a new output generators for creating chart info documents.
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376 try {
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377 t1.invert();
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378
bb484489d3df Introduced a new output generators for creating chart info documents.
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379 double[] c = new double[6];
bb484489d3df Introduced a new output generators for creating chart info documents.
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380 t1.getMatrix(c);
bb484489d3df Introduced a new output generators for creating chart info documents.
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381
bb484489d3df Introduced a new output generators for creating chart info documents.
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382 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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383 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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384 catch (NoninvertibleTransformException e) {
bb484489d3df Introduced a new output generators for creating chart info documents.
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385 // do nothing
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386 logger.warn("Matrix is not invertible.");
bb484489d3df Introduced a new output generators for creating chart info documents.
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387 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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388
bb484489d3df Introduced a new output generators for creating chart info documents.
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389 return new double[] { 1d, 1d, 0d, 0d };
bb484489d3df Introduced a new output generators for creating chart info documents.
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390 }
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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parents: 2261
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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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parents: 2261
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392
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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393 protected static Range getRangeFromAxis(ValueAxis axis) {
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parents: 2261
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394 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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395 DateAxis dAxis = (DateAxis) axis;
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396 Date min = dAxis.getMinimumDate();
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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397 Date max = dAxis.getMaximumDate();
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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398
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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399 return new Range(min.getTime(), max.getTime());
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parents: 2261
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400 }
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parents: 2261
diff changeset
401 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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402 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
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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
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404 }
647
bb484489d3df Introduced a new output generators for creating chart info documents.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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405 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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406 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org