Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/InfoGeneratorHelper.java @ 6611:dfdeed3e997e

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Shorten and correct waterlevel not in gauge string
author Andre Heinecke <aheinecke@intevation.de>
date Thu, 18 Jul 2013 17:54:44 +0200
parents af13ceeba52a
children 9b52c501c57e
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
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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
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51
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52 public InfoGeneratorHelper(ChartGenerator generator) {
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53 this.generator = generator;
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54 }
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55
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56
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57 /**
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58 * Triggers the creation of the chart info document.
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59 *
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60 * @param chart The JFreeChart chart.
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61 * @param info An info object that has been created while chart creation.
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62 *
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63 * @return the info document.
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64 */
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65 public Document createInfoDocument(
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66 JFreeChart chart,
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67 ChartRenderingInfo info)
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68 {
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69 logger.debug("InfoGeneratorHelper.createInfoDocument");
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70
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71 Document doc = XMLUtils.newDocument();
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72
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73 ElementCreator cr = new ElementCreator(
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74 doc,
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75 ArtifactNamespaceContext.NAMESPACE_URI,
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76 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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77
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78 Element chartinfo = cr.create("chartinfo");
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79
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80 chartinfo.appendChild(createAxesElements(cr, chart));
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81 chartinfo.appendChild(createTransformationElements(cr, chart, info));
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82
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83 doc.appendChild(chartinfo);
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84
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85 return doc;
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86 }
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87
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88
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89 /**
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90 * This method create a axes element that contains all domain and range
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91 * axes of the given chart.
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92 *
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93 * @param cr The ElementCreator.
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94 * @param chart The chart that provides range information of its axes.
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95 *
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96 * @return an element with axes information.
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97 */
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98 protected Element createAxesElements(
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99 ElementCreator cr,
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100 JFreeChart chart)
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101 {
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102 logger.debug("InfoGeneratorHelper.createRangeElements");
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103
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104 Element axes = cr.create("axes");
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105
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106 XYPlot plot = (XYPlot) chart.getPlot();
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107
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108 int dAxisCount = plot.getDomainAxisCount();
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109 for (int i = 0; i < dAxisCount; i++) {
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110 ValueAxis axis = plot.getDomainAxis(i);
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111 XYDataset data = plot.getDataset(i);
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112
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113 if (axis != null) {
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114 Element e = createAxisElement(cr, axis, data, "domain", i);
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115 axes.appendChild(e);
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116 }
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117 }
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118
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119 int rAxisCount = plot.getRangeAxisCount();
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120 for (int i = 0; i < rAxisCount; i++) {
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121 ValueAxis axis = plot.getRangeAxis(i);
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122 XYDataset data = plot.getDataset(i);
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123
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124 if (axis == null || data == null) {
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125 logger.warn("Axis or dataset is empty at pos: " + i);
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126 continue;
659
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127 }
673
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128
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129 Element e = createAxisElement(cr, axis, data, "range", i);
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130 axes.appendChild(e);
659
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131 }
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132
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133 return axes;
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134 }
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135
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136
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137 /**
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138 * This method create a axis element for a given <i>axis</i> and
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139 * <i>type</i>. Type can be one of 'domain' or 'range'.
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140 *
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141 * @param cr The ElementCreator
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142 * @param axis The axis that provides range information.
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143 * @param dataset The dataset for min/max determination.
659
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144 * @param type The axis type ('domain' or 'range').
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145 * @param pos The position in the chart.
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146 *
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147 * @return An element that contains range information of a given axis.
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148 */
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149 protected Element createAxisElement(
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150 ElementCreator cr,
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151 ValueAxis axis,
673
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152 XYDataset dataset,
659
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153 String type,
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154 int pos)
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155 {
1944
21a4d2c677a1 Changed doOut signature, side effect from blackboard feature (to come).
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156 logger.debug("createAxisElement " + pos);
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157 logger.debug("Axis is from type: " + axis.getClass());
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158
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159 Element e = cr.create(type);
1944
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160 cr.addAttr(e, "pos", String.valueOf(pos), true);
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161
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162 if (axis instanceof DateAxis) {
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163 prepareDateAxisElement(
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164 e, cr, (DateAxis) axis, dataset, type, pos);
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165 }
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166 else {
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167 prepareNumberAxisElement(
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168 e, cr, (NumberAxis) axis, dataset, type, pos);
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169 }
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170
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171 return e;
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172 }
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173
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174
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175 protected Element prepareNumberAxisElement(
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176 Element e,
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177 ElementCreator cr,
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178 NumberAxis axis,
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179 XYDataset dataset,
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180 String type,
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181 int pos
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182 ) {
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183 Range range = axis.getRange();
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184
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185 cr.addAttr(e, "from", String.valueOf(range.getLowerBound()), true);
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186 cr.addAttr(e, "to", String.valueOf(range.getUpperBound()), true);
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187 cr.addAttr(e, "axistype", "number", true);
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188
1944
21a4d2c677a1 Changed doOut signature, side effect from blackboard feature (to come).
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diff changeset
189 Range[] rs = generator.getRangesForAxis(pos);
673
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190 Range r = null;
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191
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192 if (type.equals("range")) {
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193 r = rs[1];
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194 }
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195 else {
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diff changeset
196 r = rs[0];
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197 }
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198
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diff changeset
199 cr.addAttr(e, "min", String.valueOf(r.getLowerBound()), true);
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200 cr.addAttr(e, "max", String.valueOf(r.getUpperBound()), true);
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diff changeset
201
659
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202 return e;
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203 }
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204
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205
2273
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206 protected Element prepareDateAxisElement(
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diff changeset
207 Element e,
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208 ElementCreator cr,
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209 DateAxis axis,
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210 XYDataset dataset,
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diff changeset
211 String type,
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
212 int pos
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
213 ) {
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
214 Date from = axis.getMinimumDate();
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215 Date to = axis.getMaximumDate();
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diff changeset
216
2330
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diff changeset
217 Bounds bounds = null;
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diff changeset
218 if (type.equals("range")) {
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219 bounds = generator.getYBounds(pos);
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220 }
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221 else {
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222 bounds = generator.getXBounds(pos);
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223 }
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224
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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225 cr.addAttr(e, "axistype", "date", true);
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226 cr.addAttr(e, "from", String.valueOf(from.getTime()), true);
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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227 cr.addAttr(e, "to", String.valueOf(to.getTime()), true);
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228
2330
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229 cr.addAttr(e, "min", bounds.getLower().toString(), true);
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230 cr.addAttr(e, "max", bounds.getUpper().toString(), true);
2273
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231
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232 return e;
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233 }
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234
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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235
659
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diff changeset
236 /**
647
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parents:
diff changeset
237 * This method appends the values of a transformation matrix to transform
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238 * image pixel coordinates into chart coordinates.
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239 *
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240 * @param cr The ElementCreator.
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241 * @param chart The chart object.
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242 * @param info The ChartRenderingInfo that is filled while chart creation.
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243 *
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244 * @return an element that contains one or more transformation matrix.
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245 */
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246 protected Element createTransformationElements(
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247 ElementCreator cr,
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248 JFreeChart chart,
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249 ChartRenderingInfo info)
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250 {
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251 logger.debug("InfoGeneratorHelper.createTransformationElements");
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252
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253 Element tf = cr.create("transformation-matrix");
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254
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255 Rectangle2D dataArea = info.getPlotInfo().getDataArea();
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256
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257 XYPlot plot = (XYPlot) chart.getPlot();
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258 ValueAxis xAxis = plot.getDomainAxis();
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259
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260 if (xAxis == null) {
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261 logger.error("There is no x axis in the chart!");
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262 return null;
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263 }
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264
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265 for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) {
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266 ValueAxis yAxis = plot.getRangeAxis(i);
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267
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268 if (yAxis == null) {
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269 logger.warn("No y axis at pos " + i + " existing.");
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270 continue;
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271 }
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272
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273 Element matrix = createTransformationElement(
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274 cr, xAxis, yAxis, dataArea, i);
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275
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276 tf.appendChild(matrix);
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277 }
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278
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279 return tf;
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280 }
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281
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282
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283 /**
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284 * Creates an element that contains values used to transform coordinates
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285 * of a coordinate system A into a coordinate system B.
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286 *
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287 * @param cr The ElementCreator.
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288 * @param xAxis The x axis of the target coordinate system.
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289 * @param yAxis The y axis of the target coordinate system.
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290 * @param dataArea The pixel coordinates of the chart image.
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291 * @param pos The dataset position.
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292 *
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293 * @return an element that contains transformation matrix values.
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294 */
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295 protected Element createTransformationElement(
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296 ElementCreator cr,
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297 ValueAxis xAxis,
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298 ValueAxis yAxis,
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299 Rectangle2D dataArea,
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300 int pos)
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301 {
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302 double[] tm = createTransformationMatrix(dataArea, xAxis, yAxis);
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303
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304 Element matrix = cr.create("matrix");
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305
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306 cr.addAttr(matrix, "pos", String.valueOf(pos), true);
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307 cr.addAttr(matrix, "sx", String.valueOf(tm[0]), true);
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308 cr.addAttr(matrix, "sy", String.valueOf(tm[1]), true);
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309 cr.addAttr(matrix, "tx", String.valueOf(tm[2]), true);
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310 cr.addAttr(matrix, "ty", String.valueOf(tm[3]), true);
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311
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312 if (xAxis instanceof DateAxis) {
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313 cr.addAttr(matrix, "xtype", "date", true);
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314 }
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315 else {
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316 cr.addAttr(matrix, "xtype", "number", true);
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317 }
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318
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319 if (yAxis instanceof DateAxis) {
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320 cr.addAttr(matrix, "ytype", "date", true);
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321 }
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322 else {
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323 cr.addAttr(matrix, "ytype", "number", true);
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324 }
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325
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326 return matrix;
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327 }
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328
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329
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330 /**
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331 * This method determines a transformation matrix to transform pixel
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332 * coordinates of the chart image into chart coordinates.
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333 *
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334 * @param dataArea The rectangle that contains the data points of the chart.
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335 * @param xAxis The x axis.
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336 * @param yAxis The y axis.
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337 *
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338 * @return a double array as follows: [sx, sy, tx, ty].
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339 */
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340 protected static double[] createTransformationMatrix(
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341 Rectangle2D dataArea,
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342 ValueAxis xAxis,
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343 ValueAxis yAxis)
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344 {
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345 logger.debug("InfoGeneratorHelper.createTransformationMatrix");
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346
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347 double offsetX = dataArea.getX();
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348 double width = dataArea.getWidth();
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349 double offsetY = dataArea.getY();
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350 double height = dataArea.getHeight();
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351
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352 Range xRange = getRangeFromAxis(xAxis);
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353 Range yRange = getRangeFromAxis(yAxis);
648
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354
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355 double lowerX = xRange.getLowerBound();
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356 double upperX = xRange.getUpperBound();
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357 double lowerY = yRange.getLowerBound();
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358 double upperY = yRange.getUpperBound();
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359
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360 if (xAxis.isInverted()) {
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361 logger.info("X-Axis is inverted!");
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362
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363 double tmp = upperX;
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364 upperX = lowerX;
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365 lowerX = tmp;
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366 }
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367
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368 double dMoveX = upperX - lowerX;
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369 double fMoveX = width * lowerX;
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370 double dMoveY = lowerY - upperY;
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371 double fMoveY = height * upperY;
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372
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373 AffineTransform t1 = AffineTransform.getTranslateInstance(
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374 offsetX - ( fMoveX / dMoveX ),
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375 offsetY - ( fMoveY / dMoveY ) );
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376
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377 AffineTransform t2 = AffineTransform.getScaleInstance(
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378 width / (upperX - lowerX),
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379 height / (lowerY - upperY));
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380
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381 t1.concatenate(t2);
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382
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383 try {
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384 t1.invert();
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385
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386 double[] c = new double[6];
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387 t1.getMatrix(c);
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388
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389 return new double[] { c[0], c[3], c[4], c[5] };
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390 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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391 catch (NoninvertibleTransformException e) {
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392 // do nothing
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393 logger.warn("Matrix is not invertible.");
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394 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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395
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396 return new double[] { 1d, 1d, 0d, 0d };
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397 }
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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398
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parents: 2261
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399
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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400 protected static Range getRangeFromAxis(ValueAxis axis) {
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401 if (axis instanceof DateAxis) {
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402 DateAxis dAxis = (DateAxis) axis;
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403 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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diff changeset
404 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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405
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
406 return new Range(min.getTime(), max.getTime());
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parents: 2261
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407 }
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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408 else {
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>
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409 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).
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2261
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410 }
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>
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diff changeset
411 }
647
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412 }
bb484489d3df Introduced a new output generators for creating chart info documents.
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413 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org