Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartExportHelper.java @ 4488:5041105d2edd
Check if response code from GGInA is 200 OK
Only parse the GGInA response if the status code is 200 OK. This improves the
error message if GGInA is not available and shows the real reason instead of a
JDOM error while parsing the response.
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Wed, 14 Nov 2012 10:36:21 +0100 |
parents | d9af29a4bb85 |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2011 by Intevation GmbH |
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3 * |
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4 * This program is free software under the LGPL (>=v2.1) |
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5 * Read the file LGPL.txt coming with the software for details |
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6 * or visit http://www.gnu.org/licenses/ if it does not exist. |
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7 */ |
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8 package de.intevation.flys.exports; |
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9 |
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10 import com.lowagie.text.Document; |
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11 import com.lowagie.text.DocumentException; |
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12 import com.lowagie.text.PageSize; |
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13 import com.lowagie.text.Rectangle; |
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14 |
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15 import com.lowagie.text.pdf.PdfContentByte; |
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16 import com.lowagie.text.pdf.PdfTemplate; |
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17 import com.lowagie.text.pdf.PdfWriter; |
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18 |
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19 import java.awt.Graphics2D; |
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20 import java.awt.Transparency; |
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21 |
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22 import java.awt.geom.Rectangle2D.Double; |
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23 |
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24 import java.awt.geom.Rectangle2D; |
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25 |
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26 import java.io.IOException; |
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27 import java.io.OutputStream; |
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28 import java.io.OutputStreamWriter; |
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29 import java.io.UnsupportedEncodingException; |
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30 import org.jfree.chart.ChartRenderingInfo; |
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31 |
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32 import javax.imageio.ImageIO; |
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33 |
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34 import au.com.bytecode.opencsv.CSVWriter; |
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35 |
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36 import org.apache.batik.svggen.SVGGraphics2D; |
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37 import org.apache.batik.svggen.SVGGraphics2DIOException; |
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38 |
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39 import org.apache.log4j.Logger; |
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40 |
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41 import org.jfree.chart.JFreeChart; |
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42 import org.jfree.chart.plot.XYPlot; |
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43 import org.jfree.data.xy.XYDataset; |
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44 |
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45 import de.intevation.artifacts.CallContext; |
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46 |
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47 import de.intevation.artifacts.common.utils.XMLUtils; |
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48 |
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49 |
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50 /** |
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51 * This class is a helper class which supports some methods to export charts |
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52 * into specific formats. |
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53 * |
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54 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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55 */ |
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56 public class ChartExportHelper { |
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57 |
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58 public static final String FORMAT_PNG = "png"; |
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59 |
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60 public static final String FORMAT_PDF = "pdf"; |
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61 |
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62 public static final String FORMAT_SVG = "svg"; |
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63 |
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64 public static final String FORMAT_CSV = "csv"; |
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65 |
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66 /** |
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67 * Constant field to define A4 as default page size. |
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68 */ |
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69 public static final String DEFAULT_PAGE_SIZE = "A4"; |
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70 |
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71 /** |
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72 * Constant field to define UTF-8 as default encoding. |
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73 */ |
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74 public static final String DEFAULT_ENCODING = "UTF-8"; |
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75 |
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76 /** The default separator for the CSV export. */ |
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77 public static final char DEFAULT_CSV_SEPARATOR = ','; |
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78 |
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79 |
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80 /** |
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81 * Logger used for logging with log4j. |
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82 */ |
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83 private static Logger log = Logger.getLogger(ChartExportHelper.class); |
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84 |
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85 |
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86 /** |
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87 * A method to export a <code>JFreeChart</code> as image to an |
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88 * <code>OutputStream</code> with a given format, width and height. |
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89 * |
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90 * @param out OutputStream |
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91 * @param chart JFreeChart object to be exported. |
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92 * @param cc context, in which e.g. size is stored. |
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93 * |
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94 * @throws IOException if writing image to OutputStream failed. |
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95 */ |
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96 public static void exportImage( |
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97 OutputStream out, |
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98 JFreeChart chart, |
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99 CallContext cc |
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100 ) |
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101 throws IOException |
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102 { |
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103 log.info("export chart as png"); |
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104 |
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105 ChartRenderingInfo info = new ChartRenderingInfo(); |
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106 |
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107 String format = (String) cc.getContextValue("chart.image.format"); |
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108 |
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109 int[] size = getSize(cc); |
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110 |
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111 ImageIO.write( |
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112 chart.createBufferedImage( |
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113 size[0], size[1], Transparency.BITMASK, info |
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114 ), |
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115 format, |
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116 out |
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117 ); |
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118 } |
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119 |
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120 |
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121 /** |
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122 * A method to export a <code>JFreeChart</code> as SVG to an |
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123 * <code>OutputStream</code>. |
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124 * |
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125 * @param out OutputStream |
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126 * @param chart JFreeChart to be exported |
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127 * @param context The CallContext object that contains extra chart |
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128 * parameters. |
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129 */ |
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130 public static void exportSVG( |
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131 OutputStream out, |
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132 JFreeChart chart, |
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133 CallContext context |
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134 ) { |
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135 String encoding = (String) context.getContextValue("chart.encoding"); |
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136 |
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137 log.info("export chart as svg"); |
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138 |
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139 if (encoding == null) |
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140 encoding = DEFAULT_ENCODING; |
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141 |
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142 org.w3c.dom.Document document = XMLUtils.newDocument(); |
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143 SVGGraphics2D graphics = new SVGGraphics2D(document); |
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144 |
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145 int[] size = getSize(context); |
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146 |
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147 ChartRenderingInfo info = new ChartRenderingInfo(); |
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148 |
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149 chart.draw(graphics, new Rectangle2D.Double(0.0D, 0.0D,size[0],size[1]), info); |
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150 |
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151 try { |
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152 graphics.stream(new OutputStreamWriter(out, encoding)); |
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153 } |
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154 catch (SVGGraphics2DIOException svge) { |
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155 log.error("Error while writing svg export to output stream.", svge); |
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156 } |
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157 catch (UnsupportedEncodingException uee) { |
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158 log.error("Unsupported encoding: " + encoding, uee); |
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159 } |
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160 } |
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161 |
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162 |
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163 /** |
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164 * A method to export a <code>JFreeChart</code> as PDF to an |
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165 * <code>OutputStream</code>. |
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166 * |
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167 * @param out OutputStream |
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168 * @param chart JFreeChart |
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169 */ |
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170 public static void exportPDF( |
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171 OutputStream out, |
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172 JFreeChart chart, |
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173 CallContext cc |
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174 ) { |
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175 log.info("export chart as pdf."); |
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176 |
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177 String pageFormat = (String) cc.getContextValue("chart.page.format"); |
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178 |
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179 if (pageFormat == null) |
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180 pageFormat = DEFAULT_PAGE_SIZE; |
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181 |
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182 // Max size of the chart. |
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183 Rectangle page = PageSize.getRectangle(pageFormat); |
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184 float pageWidth = page.getWidth(); |
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185 float pageHeight = page.getHeight(); |
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186 |
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187 // The chart width. |
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188 int[] size = getSize(cc); |
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189 |
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190 boolean landscape = size[0] > size[1]; |
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191 |
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192 float width = 0; |
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193 float height = 0; |
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194 if (landscape) { |
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195 width = pageHeight; |
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196 height = pageWidth; |
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197 } |
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198 else { |
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199 width = pageWidth; |
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200 height = pageHeight; |
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201 } |
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202 |
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203 float marginLeft = (Float) cc.getContextValue( |
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204 "chart.marginLeft"); |
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205 |
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206 float marginRight = (Float) cc.getContextValue( |
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207 "chart.marginRight"); |
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208 |
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209 float marginTop = (Float) cc.getContextValue( |
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210 "chart.marginTop"); |
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211 |
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212 float marginBottom = (Float) cc.getContextValue( |
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213 "chart.marginBottom"); |
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214 |
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215 float spaceX = width - marginLeft - marginRight; |
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216 if (size[0] > spaceX) { |
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217 log.warn("Width of the chart is too big for pdf -> resize it now."); |
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218 double ratio = ((double)spaceX) / size[0]; |
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219 size[0] *= ratio; |
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220 size[1] *= ratio; |
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221 log.debug("Resized chart to " + size[0] + "x" + size[1]); |
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222 } |
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223 |
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224 float spaceY = height - marginTop - marginBottom; |
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225 if (size[1] > spaceY) { |
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226 log.warn("Height of the chart is too big for pdf -> resize it now."); |
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227 double ratio = ((double)spaceY) / size[1]; |
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228 size[0] *= ratio; |
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229 size[1] *= ratio; |
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230 log.debug("Resized chart to " + size[0] + "x" + size[1]); |
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231 } |
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232 |
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233 Document document = null; |
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234 if (landscape) { |
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235 document = new Document(page.rotate()); |
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236 log.debug("Create landscape pdf."); |
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237 } |
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238 else |
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239 document = new Document(page); |
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240 |
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241 try { |
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242 PdfWriter writer = PdfWriter.getInstance(document, out); |
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243 |
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244 document.addSubject(chart.getTitle().getText()); |
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245 document.addCreationDate(); |
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246 document.open(); |
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247 |
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248 PdfContentByte content = writer.getDirectContent(); |
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249 |
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250 PdfTemplate template = content.createTemplate(width, height); |
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251 Graphics2D graphics = template.createGraphics(width, height); |
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252 |
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253 double[] origin = getCenteredAnchor( |
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254 marginLeft, marginRight, marginBottom, marginTop, |
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255 width, height, |
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256 size[0], size[1]); |
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257 |
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258 Rectangle2D area = new Rectangle2D.Double( |
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259 origin[0], origin[1], size[0], size[1]); |
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260 |
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261 ChartRenderingInfo info = new ChartRenderingInfo(); |
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262 |
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263 chart.draw(graphics, area, info); |
152
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264 graphics.dispose(); |
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265 content.addTemplate(template, 0f, 0f); |
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266 } |
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267 catch (DocumentException de) { |
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268 log.error("Error while exporting chart to pdf.", de); |
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269 } |
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270 finally { |
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271 document.close(); |
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272 } |
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273 } |
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274 |
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275 |
2231
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276 /** |
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277 * A method to export a CSV file to an |
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278 * <code>OutputStream</code>. |
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279 * |
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280 * @param out OutputStream |
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281 * @param chart JFreeChart containing the data. |
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282 * @param context The CallContext object that contains extra parameters. |
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283 */ |
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284 public static void exportCSV( |
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285 OutputStream out, |
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286 JFreeChart chart, |
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287 CallContext context) |
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288 { |
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289 log.debug("export chart as CSV"); |
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290 CSVWriter writer = null; |
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291 try { |
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292 writer = new CSVWriter( |
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293 new OutputStreamWriter( |
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294 out, |
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295 DEFAULT_ENCODING), |
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296 DEFAULT_CSV_SEPARATOR); |
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297 } |
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298 catch(UnsupportedEncodingException uee) { |
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299 log.warn("Wrong encoding for CSV export."); |
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300 return; |
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301 } |
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302 XYPlot plot = chart.getXYPlot(); |
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303 int count = plot.getDatasetCount(); |
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304 for (int i = 0; i < count; i++) { |
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305 XYDataset data = plot.getDataset(i); |
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306 int scount = data.getSeriesCount(); |
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307 for (int j = 0; j < scount; j++) { |
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308 Comparable seriesKey = data.getSeriesKey(j); |
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309 log.debug("series key: " + seriesKey.toString()); |
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310 writeCSVHeader(writer, seriesKey.toString()); |
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311 writeCSVData(writer, data); |
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312 } |
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313 } |
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314 try { |
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315 writer.close(); |
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316 } |
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317 catch(IOException ioe) { |
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318 log.error("Writing CSV export failed!"); |
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319 } |
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320 } |
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321 |
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322 |
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323 protected static void writeCSVHeader(CSVWriter writer, String key) { |
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324 writer.writeNext(new String[] {"#"}); |
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325 writer.writeNext(new String[] {"# " + key}); |
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326 writer.writeNext(new String[] {"#"}); |
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327 writer.writeNext(new String[] {"X", "Y"}); |
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328 } |
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329 |
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330 |
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331 protected static void writeCSVData(CSVWriter writer, XYDataset data) { |
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332 int series = data.getSeriesCount(); |
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333 for (int i = 0; i < series; i++) { |
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334 int items = data.getItemCount(i); |
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335 for (int j = 0; j < items; j++) { |
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336 log.debug("write data: " + data.getX(i, j) + ", " + data.getY(i, j)); |
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337 writer.writeNext(new String[] { |
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338 data.getX(i, j).toString(), |
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339 data.getY(i, j).toString()}); |
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340 } |
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341 } |
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342 } |
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343 |
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344 |
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345 public static int[] getSize(CallContext cc) { |
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346 int[] size = new int[2]; |
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347 |
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348 size[0] = (Integer) cc.getContextValue("chart.width"); |
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349 size[1] = (Integer) cc.getContextValue("chart.height"); |
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350 |
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351 return size; |
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352 } |
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353 |
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354 |
152
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355 /** |
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356 * This method returns the anchor of the chart so that the chart is centered |
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357 * according to the given parameters. |
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358 * |
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359 * @param mLeft Left margin |
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360 * @param mRight Right margin |
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361 * @param mBottom Bottom margin |
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362 * @param mTop Top margin |
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363 * @param width The complete width of the drawing area. |
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364 * @param height The complete height of the drawing area. |
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365 * @param chartWidth The width of the chart. |
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366 * @param chartHeight The height of the chart. |
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367 * |
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368 * @return an array that contains the anchor for a chart with the given |
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369 * parameters. The first value is the x point, the second value is the y |
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370 * point. |
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371 */ |
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372 public static double[] getCenteredAnchor( |
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373 double mLeft, double mRight, double mBottom, double mTop, |
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374 double width, double height, |
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375 double chartWidth, double chartHeight |
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376 ) { |
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377 if (log.isDebugEnabled()) { |
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378 log.debug("Calculate centered origin..."); |
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379 log.debug("-> PDF width : " + width); |
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380 log.debug("-> PDF height : " + height); |
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381 log.debug("-> Chart width : " + chartWidth); |
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382 log.debug("-> Chart height : " + chartHeight); |
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383 log.debug("-> margin left : " + mLeft); |
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384 log.debug("-> margin right : " + mRight); |
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385 log.debug("-> margin bottom: " + mBottom); |
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386 log.debug("-> margin top : " + mTop); |
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387 } |
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388 |
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389 double[] origin = new double[2]; |
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390 |
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391 double centerX = width / 2; |
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392 double centerY = height / 2; |
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393 |
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394 origin[0] = centerX - chartWidth / 2; |
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395 origin[1] = centerY - chartHeight / 2; |
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396 |
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397 origin[0] = origin[0] >= mLeft ? origin[0] : mLeft; |
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398 origin[1] = origin[1] >= mTop ? origin[1] : mTop; |
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399 |
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400 if (log.isDebugEnabled()) { |
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401 log.debug("==> centered left origin: " + origin[0]); |
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402 log.debug("==> centered top origin: " + origin[1]); |
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403 } |
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404 |
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405 return origin; |
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406 } |
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407 } |
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408 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |