Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartExportHelper.java @ 4242:448cbd8708d5

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Added new classes for the last commit.
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 24 Oct 2012 14:44:12 +0200
parents d9af29a4bb85
children
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 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);
152
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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 *
956445dd601d Added a helper class to export charts.
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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
152
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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
152
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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.
152
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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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4ac581062c40 Fix various documentation issues.
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187 // The chart width.
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188 int[] size = getSize(cc);
152
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189
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190 boolean landscape = size[0] > size[1];
152
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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
5966a20fc72c Enabled support for PDF and SVG chart exports.
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206 float marginRight = (Float) cc.getContextValue(
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207 "chart.marginRight");
5966a20fc72c Enabled support for PDF and SVG chart exports.
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208
5966a20fc72c Enabled support for PDF and SVG chart exports.
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209 float marginTop = (Float) cc.getContextValue(
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210 "chart.marginTop");
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211
5966a20fc72c Enabled support for PDF and SVG chart exports.
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212 float marginBottom = (Float) cc.getContextValue(
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213 "chart.marginBottom");
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214
152
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215 float spaceX = width - marginLeft - marginRight;
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216 if (size[0] > spaceX) {
152
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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;
5966a20fc72c Enabled support for PDF and SVG chart exports.
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220 size[1] *= ratio;
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221 log.debug("Resized chart to " + size[0] + "x" + size[1]);
152
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222 }
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diff changeset
223
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224 float spaceY = height - marginTop - marginBottom;
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225 if (size[1] > spaceY) {
152
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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];
5966a20fc72c Enabled support for PDF and SVG chart exports.
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228 size[0] *= ratio;
5966a20fc72c Enabled support for PDF and SVG chart exports.
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229 size[1] *= ratio;
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230 log.debug("Resized chart to " + size[0] + "x" + size[1]);
152
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231 }
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232
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diff changeset
233 Document document = null;
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diff changeset
234 if (landscape) {
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235 document = new Document(page.rotate());
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diff changeset
236 log.debug("Create landscape pdf.");
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237 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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diff changeset
238 else
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239 document = new Document(page);
956445dd601d Added a helper class to export charts.
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diff changeset
240
956445dd601d Added a helper class to export charts.
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diff changeset
241 try {
956445dd601d Added a helper class to export charts.
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242 PdfWriter writer = PdfWriter.getInstance(document, out);
956445dd601d Added a helper class to export charts.
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diff changeset
243
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244 document.addSubject(chart.getTitle().getText());
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245 document.addCreationDate();
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diff changeset
246 document.open();
956445dd601d Added a helper class to export charts.
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diff changeset
247
956445dd601d Added a helper class to export charts.
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diff changeset
248 PdfContentByte content = writer.getDirectContent();
956445dd601d Added a helper class to export charts.
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diff changeset
249
956445dd601d Added a helper class to export charts.
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250 PdfTemplate template = content.createTemplate(width, height);
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diff changeset
251 Graphics2D graphics = template.createGraphics(width, height);
956445dd601d Added a helper class to export charts.
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diff changeset
252
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diff changeset
253 double[] origin = getCenteredAnchor(
956445dd601d Added a helper class to export charts.
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diff changeset
254 marginLeft, marginRight, marginBottom, marginTop,
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parents:
diff changeset
255 width, height,
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256 size[0], size[1]);
152
956445dd601d Added a helper class to export charts.
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diff changeset
257
956445dd601d Added a helper class to export charts.
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diff changeset
258 Rectangle2D area = new Rectangle2D.Double(
1735
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259 origin[0], origin[1], size[0], size[1]);
152
956445dd601d Added a helper class to export charts.
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diff changeset
260
2160
8428de5846e8 Employ ChartRenderingInfo when creating svg/pdf exports.
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diff changeset
261 ChartRenderingInfo info = new ChartRenderingInfo();
8428de5846e8 Employ ChartRenderingInfo when creating svg/pdf exports.
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parents: 1735
diff changeset
262
8428de5846e8 Employ ChartRenderingInfo when creating svg/pdf exports.
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diff changeset
263 chart.draw(graphics, area, info);
152
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diff changeset
264 graphics.dispose();
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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diff changeset
265 content.addTemplate(template, 0f, 0f);
956445dd601d Added a helper class to export charts.
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parents:
diff changeset
266 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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diff changeset
267 catch (DocumentException de) {
956445dd601d Added a helper class to export charts.
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diff changeset
268 log.error("Error while exporting chart to pdf.", de);
956445dd601d Added a helper class to export charts.
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parents:
diff changeset
269 }
956445dd601d Added a helper class to export charts.
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diff changeset
270 finally {
956445dd601d Added a helper class to export charts.
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diff changeset
271 document.close();
956445dd601d Added a helper class to export charts.
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diff changeset
272 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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diff changeset
273 }
956445dd601d Added a helper class to export charts.
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274
956445dd601d Added a helper class to export charts.
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275
2231
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
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276 /**
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
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277 * A method to export a CSV file to an
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
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diff changeset
278 * <code>OutputStream</code>.
5648b5b34ae2 Issue 466.
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279 *
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
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280 * @param out OutputStream
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
281 * @param chart JFreeChart containing the data.
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
282 * @param context The CallContext object that contains extra parameters.
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
283 */
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
284 public static void exportCSV(
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
285 OutputStream out,
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
286 JFreeChart chart,
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
287 CallContext context)
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
288 {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
289 log.debug("export chart as CSV");
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
290 CSVWriter writer = null;
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
291 try {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
292 writer = new CSVWriter(
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
293 new OutputStreamWriter(
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
294 out,
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
295 DEFAULT_ENCODING),
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
296 DEFAULT_CSV_SEPARATOR);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
297 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
298 catch(UnsupportedEncodingException uee) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
299 log.warn("Wrong encoding for CSV export.");
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
300 return;
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
301 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
302 XYPlot plot = chart.getXYPlot();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
303 int count = plot.getDatasetCount();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
304 for (int i = 0; i < count; i++) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
305 XYDataset data = plot.getDataset(i);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
306 int scount = data.getSeriesCount();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
307 for (int j = 0; j < scount; j++) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
308 Comparable seriesKey = data.getSeriesKey(j);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
309 log.debug("series key: " + seriesKey.toString());
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
310 writeCSVHeader(writer, seriesKey.toString());
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
311 writeCSVData(writer, data);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
312 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
313 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
314 try {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
315 writer.close();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
316 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
317 catch(IOException ioe) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
318 log.error("Writing CSV export failed!");
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
319 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
320 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
321
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 protected static void writeCSVHeader(CSVWriter writer, String key) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
324 writer.writeNext(new String[] {"#"});
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
325 writer.writeNext(new String[] {"# " + key});
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
326 writer.writeNext(new String[] {"#"});
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
327 writer.writeNext(new String[] {"X", "Y"});
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
328 }
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 protected static void writeCSVData(CSVWriter writer, XYDataset data) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
332 int series = data.getSeriesCount();
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
333 for (int i = 0; i < series; i++) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
334 int items = data.getItemCount(i);
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
335 for (int j = 0; j < items; j++) {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
336 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
337 writer.writeNext(new String[] {
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
338 data.getX(i, j).toString(),
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
339 data.getY(i, j).toString()});
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 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
342 }
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
343
5648b5b34ae2 Issue 466.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 2160
diff changeset
344
1735
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
345 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
346 int[] size = new int[2];
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
347
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
348 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
349 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
350
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
351 return size;
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
352 }
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
353
5966a20fc72c Enabled support for PDF and SVG chart exports.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1036
diff changeset
354
152
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
355 /**
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
356 * 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
357 * according to the given parameters.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
358 *
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
359 * @param mLeft Left margin
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
360 * @param mRight Right margin
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
361 * @param mBottom Bottom margin
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
362 * @param mTop Top margin
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
363 * @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
364 * @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
365 * @param chartWidth The width of the chart.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
366 * @param chartHeight The height of the chart.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
367 *
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
368 * @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
369 * 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
370 * point.
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
371 */
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
372 public static double[] getCenteredAnchor(
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
373 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
374 double width, double height,
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
375 double chartWidth, double chartHeight
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
376 ) {
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
377 if (log.isDebugEnabled()) {
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
378 log.debug("Calculate centered origin...");
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
379 log.debug("-> PDF width : " + width);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
380 log.debug("-> PDF height : " + height);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
381 log.debug("-> Chart width : " + chartWidth);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
382 log.debug("-> Chart height : " + chartHeight);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
383 log.debug("-> margin left : " + mLeft);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
384 log.debug("-> margin right : " + mRight);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
385 log.debug("-> margin bottom: " + mBottom);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
386 log.debug("-> margin top : " + mTop);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
387 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
388
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
389 double[] origin = new double[2];
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
390
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
391 double centerX = width / 2;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
392 double centerY = height / 2;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
393
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
394 origin[0] = centerX - chartWidth / 2;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
395 origin[1] = centerY - chartHeight / 2;
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
396
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
397 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
398 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
399
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
400 if (log.isDebugEnabled()) {
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
401 log.debug("==> centered left origin: " + origin[0]);
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
402 log.debug("==> centered top origin: " + origin[1]);
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
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
405 return origin;
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 }
956445dd601d Added a helper class to export charts.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
408 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org