Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartExportHelper.java @ 2231:5648b5b34ae2

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Issue 466. Added CSV export for activated chart themes excluding annotations. flys-artifacts/trunk@3874 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Thu, 02 Feb 2012 10:54:21 +0000
parents 8428de5846e8
children 4ac581062c40
rev   line source
152
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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 format Format (e.g. png, gif, jpg)
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93 * @param width Width, the image used to be
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94 * @param height Height, the image used to be
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95 *
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96 * @throws IOException if writing image to OutputStream failed.
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97 */
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98 public static void exportImage(
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99 OutputStream out,
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100 JFreeChart chart,
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101 CallContext cc
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102 )
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103 throws IOException
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104 {
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105 log.info("export chart as png");
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106
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107 ChartRenderingInfo info = new ChartRenderingInfo();
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108
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109 String format = (String) cc.getContextValue("chart.image.format");
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110
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111 int[] size = getSize(cc);
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112
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113 ImageIO.write(
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114 chart.createBufferedImage(
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115 size[0], size[1], Transparency.BITMASK, info
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116 ),
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117 format,
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118 out
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119 );
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120 }
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121
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122
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123 /**
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124 * A method to export a <code>JFreeChart</code> as SVG to an
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125 * <code>OutputStream</code>.
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126 *
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127 * @param out OutputStream
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128 * @param chart JFreeChart to be exported
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129 * @param context The CallContext object that contains extra chart
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130 * parameters.
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131 */
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132 public static void exportSVG(
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133 OutputStream out,
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134 JFreeChart chart,
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135 CallContext context
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136 ) {
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137 String encoding = (String) context.getContextValue("chart.encoding");
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138
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139 log.info("export chart as svg");
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140
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141 if (encoding == null)
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142 encoding = DEFAULT_ENCODING;
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143
956445dd601d Added a helper class to export charts.
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144 org.w3c.dom.Document document = XMLUtils.newDocument();
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145 SVGGraphics2D graphics = new SVGGraphics2D(document);
956445dd601d Added a helper class to export charts.
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146
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147 int[] size = getSize(context);
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148
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149 ChartRenderingInfo info = new ChartRenderingInfo();
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150
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151 chart.draw(graphics, new Rectangle2D.Double(0.0D, 0.0D,size[0],size[1]), info);
152
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152
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153 try {
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154 graphics.stream(new OutputStreamWriter(out, encoding));
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155 }
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156 catch (SVGGraphics2DIOException svge) {
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157 log.error("Error while writing svg export to output stream.", svge);
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158 }
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159 catch (UnsupportedEncodingException uee) {
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160 log.error("Unsupported encoding: " + encoding, uee);
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161 }
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162 }
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163
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164
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165 /**
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166 * A method to export a <code>JFreeChart</code> as PDF to an
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167 * <code>OutputStream</code>.
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168 *
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169 * @param out OutputStream
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170 * @param chart JFreeChart
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171 * @param pageFormat String to specify a page format, {@link
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172 * #DEFAULT_PAGE_SIZE} is used if no pageFormat is given
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173 * @param landscape If this is true, the pdf is delivered in landscape
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174 * format
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175 * @param marginLeft Space to left border
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176 * @param marginRight Space to right border
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177 * @param marginTop Space to upper border
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178 * @param marginBottom Space to lower border
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179 */
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180 public static void exportPDF(
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181 OutputStream out,
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182 JFreeChart chart,
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183 CallContext cc
152
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184 ) {
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185 log.info("export chart as pdf.");
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186
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187 String pageFormat = (String) cc.getContextValue("chart.page.format");
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188
152
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189 if (pageFormat == null)
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190 pageFormat = DEFAULT_PAGE_SIZE;
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191
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192 // max size of the chart
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193 Rectangle page = PageSize.getRectangle(pageFormat);
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194 float pageWidth = page.getWidth();
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195 float pageHeight = page.getHeight();
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196
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197 // the chart width
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198 int[] size = getSize(cc);
152
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199
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200 boolean landscape = size[0] > size[1];
152
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201
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202 float width = 0;
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203 float height = 0;
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204 if (landscape) {
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205 width = pageHeight;
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206 height = pageWidth;
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207 }
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208 else {
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209 width = pageWidth;
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210 height = pageHeight;
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211 }
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212
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213 float marginLeft = (Float) cc.getContextValue(
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214 "chart.marginLeft");
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215
5966a20fc72c Enabled support for PDF and SVG chart exports.
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216 float marginRight = (Float) cc.getContextValue(
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217 "chart.marginRight");
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218
5966a20fc72c Enabled support for PDF and SVG chart exports.
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219 float marginTop = (Float) cc.getContextValue(
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220 "chart.marginTop");
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221
5966a20fc72c Enabled support for PDF and SVG chart exports.
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222 float marginBottom = (Float) cc.getContextValue(
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223 "chart.marginBottom");
5966a20fc72c Enabled support for PDF and SVG chart exports.
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224
152
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225 float spaceX = width - marginLeft - marginRight;
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5966a20fc72c Enabled support for PDF and SVG chart exports.
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226 if (size[0] > spaceX) {
152
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227 log.warn("Width of the chart is too big for pdf -> resize it now.");
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228 double ratio = ((double)spaceX) / size[0];
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229 size[0] *= ratio;
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230 size[1] *= ratio;
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231 log.debug("Resized chart to " + size[0] + "x" + size[1]);
152
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232 }
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233
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234 float spaceY = height - marginTop - marginBottom;
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235 if (size[1] > spaceY) {
152
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236 log.warn("Height of the chart is too big for pdf -> resize it now.");
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237 double ratio = ((double)spaceY) / size[1];
5966a20fc72c Enabled support for PDF and SVG chart exports.
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238 size[0] *= ratio;
5966a20fc72c Enabled support for PDF and SVG chart exports.
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239 size[1] *= ratio;
5966a20fc72c Enabled support for PDF and SVG chart exports.
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240 log.debug("Resized chart to " + size[0] + "x" + size[1]);
152
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241 }
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242
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diff changeset
243 Document document = null;
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244 if (landscape) {
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245 document = new Document(page.rotate());
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246 log.debug("Create landscape pdf.");
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diff changeset
247 }
956445dd601d Added a helper class to export charts.
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diff changeset
248 else
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249 document = new Document(page);
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diff changeset
250
956445dd601d Added a helper class to export charts.
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diff changeset
251 try {
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252 PdfWriter writer = PdfWriter.getInstance(document, out);
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253
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254 document.addSubject(chart.getTitle().getText());
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255 document.addCreationDate();
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diff changeset
256 document.open();
956445dd601d Added a helper class to export charts.
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diff changeset
257
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diff changeset
258 PdfContentByte content = writer.getDirectContent();
956445dd601d Added a helper class to export charts.
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259
956445dd601d Added a helper class to export charts.
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260 PdfTemplate template = content.createTemplate(width, height);
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diff changeset
261 Graphics2D graphics = template.createGraphics(width, height);
956445dd601d Added a helper class to export charts.
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diff changeset
262
956445dd601d Added a helper class to export charts.
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diff changeset
263 double[] origin = getCenteredAnchor(
956445dd601d Added a helper class to export charts.
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diff changeset
264 marginLeft, marginRight, marginBottom, marginTop,
956445dd601d Added a helper class to export charts.
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diff changeset
265 width, height,
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266 size[0], size[1]);
152
956445dd601d Added a helper class to export charts.
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diff changeset
267
956445dd601d Added a helper class to export charts.
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268 Rectangle2D area = new Rectangle2D.Double(
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269 origin[0], origin[1], size[0], size[1]);
152
956445dd601d Added a helper class to export charts.
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270
2160
8428de5846e8 Employ ChartRenderingInfo when creating svg/pdf exports.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
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diff changeset
271 ChartRenderingInfo info = new ChartRenderingInfo();
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diff changeset
272
8428de5846e8 Employ ChartRenderingInfo when creating svg/pdf exports.
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diff changeset
273 chart.draw(graphics, area, info);
152
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diff changeset
274 graphics.dispose();
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275 content.addTemplate(template, 0f, 0f);
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diff changeset
276 }
956445dd601d Added a helper class to export charts.
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277 catch (DocumentException de) {
956445dd601d Added a helper class to export charts.
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278 log.error("Error while exporting chart to pdf.", de);
956445dd601d Added a helper class to export charts.
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diff changeset
279 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
280 finally {
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
281 document.close();
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
282 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
283 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
284
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
285
2231
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
286 /**
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
287 * A method to export a CSV file to an
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
288 * <code>OutputStream</code>.
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
289 *
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
290 * @param out OutputStream
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
291 * @param chart JFreeChart containing the data.
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
292 * @param context The CallContext object that contains extra parameters.
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
293 */
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
294 public static void exportCSV(
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
295 OutputStream out,
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
296 JFreeChart chart,
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
297 CallContext context)
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
298 {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
299 log.debug("export chart as CSV");
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
300 CSVWriter writer = null;
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
301 try {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
302 writer = new CSVWriter(
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
303 new OutputStreamWriter(
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
304 out,
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
305 DEFAULT_ENCODING),
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
306 DEFAULT_CSV_SEPARATOR);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
307 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
308 catch(UnsupportedEncodingException uee) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
309 log.warn("Wrong encoding for CSV export.");
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
310 return;
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
311 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
312 XYPlot plot = chart.getXYPlot();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
313 int count = plot.getDatasetCount();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
314 for (int i = 0; i < count; i++) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
315 XYDataset data = plot.getDataset(i);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
316 int scount = data.getSeriesCount();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
317 for (int j = 0; j < scount; j++) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
318 Comparable seriesKey = data.getSeriesKey(j);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
319 log.debug("series key: " + seriesKey.toString());
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
320 writeCSVHeader(writer, seriesKey.toString());
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
321 writeCSVData(writer, data);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
322 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
323 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
324 try {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
325 writer.close();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
326 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
327 catch(IOException ioe) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
328 log.error("Writing CSV export failed!");
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
329 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
330 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
331
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
332
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
333 protected static void writeCSVHeader(CSVWriter writer, String key) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
334 writer.writeNext(new String[] {"#"});
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
335 writer.writeNext(new String[] {"# " + key});
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
336 writer.writeNext(new String[] {"#"});
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
337 writer.writeNext(new String[] {"X", "Y"});
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
338 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
339
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
340
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
341 protected static void writeCSVData(CSVWriter writer, XYDataset data) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
342 int series = data.getSeriesCount();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
343 for (int i = 0; i < series; i++) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
344 int items = data.getItemCount(i);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
345 for (int j = 0; j < items; j++) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
346 log.debug("write data: " + data.getX(i, j) + ", " + data.getY(i, j));
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
347 writer.writeNext(new String[] {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
348 data.getX(i, j).toString(),
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
349 data.getY(i, j).toString()});
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
350 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
351 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
352 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
353
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
354
1735
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
355 public static int[] getSize(CallContext cc) {
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
356 int[] size = new int[2];
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
357
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
358 size[0] = (Integer) cc.getContextValue("chart.width");
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
359 size[1] = (Integer) cc.getContextValue("chart.height");
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
360
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
361 return size;
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
362 }
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
363
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
364
152
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
365 /**
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
366 * This method returns the anchor of the chart so that the chart is centered
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
367 * according to the given parameters.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
368 *
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
369 * @param mLeft Left margin
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
370 * @param mRight Right margin
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
371 * @param mBottom Bottom margin
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
372 * @param mTop Top margin
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
373 * @param width The complete width of the drawing area.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
374 * @param height The complete height of the drawing area.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
375 * @param chartWidth The width of the chart.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
376 * @param chartHeight The height of the chart.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
377 *
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
378 * @return an array that contains the anchor for a chart with the given
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
379 * parameters. The first value is the x point, the second value is the y
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
380 * point.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
381 */
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
382 public static double[] getCenteredAnchor(
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
383 double mLeft, double mRight, double mBottom, double mTop,
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
384 double width, double height,
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
385 double chartWidth, double chartHeight
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
386 ) {
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
387 if (log.isDebugEnabled()) {
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
388 log.debug("Calculate centered origin...");
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
389 log.debug("-> PDF width : " + width);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
390 log.debug("-> PDF height : " + height);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
391 log.debug("-> Chart width : " + chartWidth);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
392 log.debug("-> Chart height : " + chartHeight);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
393 log.debug("-> margin left : " + mLeft);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
394 log.debug("-> margin right : " + mRight);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
395 log.debug("-> margin bottom: " + mBottom);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
396 log.debug("-> margin top : " + mTop);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
397 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
398
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
399 double[] origin = new double[2];
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
400
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
401 double centerX = width / 2;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
402 double centerY = height / 2;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
403
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
404 origin[0] = centerX - chartWidth / 2;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
405 origin[1] = centerY - chartHeight / 2;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
406
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
407 origin[0] = origin[0] >= mLeft ? origin[0] : mLeft;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
408 origin[1] = origin[1] >= mTop ? origin[1] : mTop;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
409
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
410 if (log.isDebugEnabled()) {
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
411 log.debug("==> centered left origin: " + origin[0]);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
412 log.debug("==> centered top origin: " + origin[1]);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
413 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
414
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
415 return origin;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
416 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
417 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
418 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org