Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java @ 923:7ca4a287cd0e
#135 Modified the way to store datasets for different chart axes.
flys-artifacts/trunk@2275 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 01 Jul 2011 11:16:11 +0000 |
parents | f3fd8c9b7f51 |
children | f7761914f745 |
rev | line source |
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1 package de.intevation.flys.exports; |
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2 |
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3 import java.awt.BasicStroke; |
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4 import java.awt.Color; |
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5 import java.awt.Stroke; |
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6 |
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7 import java.io.IOException; |
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8 |
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9 import org.apache.log4j.Logger; |
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10 |
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11 import org.jfree.chart.ChartFactory; |
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12 import org.jfree.chart.JFreeChart; |
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13 import org.jfree.chart.axis.NumberAxis; |
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14 import org.jfree.chart.axis.ValueAxis; |
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15 import org.jfree.chart.plot.PlotOrientation; |
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16 import org.jfree.chart.plot.XYPlot; |
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17 import org.jfree.data.Range; |
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18 import org.jfree.data.xy.XYDataset; |
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19 import org.jfree.data.xy.XYSeries; |
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20 import org.jfree.data.xy.XYSeriesCollection; |
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21 |
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22 import org.jfree.ui.RectangleInsets; |
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23 |
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24 import de.intevation.flys.exports.ChartExportHelper; |
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25 |
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26 |
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27 /** |
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28 * An abstract base class for creating XY charts. |
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29 * |
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30 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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31 */ |
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32 public abstract class XYChartGenerator extends ChartGenerator { |
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33 |
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34 /** The logger that is used in this generator.*/ |
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35 private static Logger logger = Logger.getLogger(XYChartGenerator.class); |
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36 |
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37 |
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38 /** SeriesCollection used for the first axis.*/ |
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39 protected XYSeriesCollection first; |
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40 |
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#135 Modified the way to store datasets for different chart axes.
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parents:
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41 /** SeriesCollection used for the second axis.*/ |
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42 protected XYSeriesCollection second; |
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43 |
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#135 Modified the way to store datasets for different chart axes.
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44 |
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45 public static final Color DEFAULT_GRID_COLOR = Color.GRAY; |
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46 public static final float DEFAULT_GRID_LINE_WIDTH = 0.3f; |
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Display gridlines in charts.
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47 |
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Display gridlines in charts.
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48 |
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49 /** |
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50 * Returns the title of a chart. |
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51 * |
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52 * @return the title of a chart. |
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53 */ |
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54 protected abstract String getChartTitle(); |
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55 |
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56 /** |
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57 * Returns the X-Axis label of a chart. |
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58 * |
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59 * @return the X-Axis label of a chart. |
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60 */ |
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61 protected abstract String getXAxisLabel(); |
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62 |
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63 /** |
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64 * Returns the Y-Axis label of a chart. |
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65 * |
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66 * @return the Y-Axis label of a chart. |
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67 */ |
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68 protected abstract String getYAxisLabel(); |
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69 |
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70 |
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71 public void generate() |
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72 throws IOException |
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73 { |
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74 logger.debug("XYChartGenerator.generate"); |
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75 |
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76 JFreeChart chart = generateChart(); |
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77 |
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78 int[] size = getSize(); |
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79 |
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80 ChartExportHelper.exportImage( |
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81 out, |
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82 chart, |
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83 "png", |
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84 size[0], size[1]); |
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85 } |
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86 |
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87 |
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88 public JFreeChart generateChart() { |
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89 logger.debug("XYChartGenerator.generateChart"); |
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parents:
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90 |
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91 JFreeChart chart = ChartFactory.createXYLineChart( |
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92 getChartTitle(), |
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93 getXAxisLabel(), |
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94 getYAxisLabel(), |
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95 null, |
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96 PlotOrientation.VERTICAL, |
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97 true, |
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98 false, |
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99 false); |
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100 |
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101 chart.setBackgroundPaint(Color.WHITE); |
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102 chart.getPlot().setBackgroundPaint(Color.WHITE); |
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103 |
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104 XYPlot plot = (XYPlot) chart.getPlot(); |
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105 |
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106 addDatasets(plot); |
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107 addSubtitles(chart); |
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108 adjustPlot(plot); |
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109 adjustAxes(plot); |
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110 |
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111 removeEmptyRangeAxes(plot); |
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112 |
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113 autoZoom(plot); |
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114 |
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115 return chart; |
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116 } |
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117 |
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118 |
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119 protected void addDatasets(XYPlot plot) { |
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120 if (first != null) { |
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121 logger.debug("Set the first axis dataset."); |
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122 plot.setDataset(0, first); |
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123 } |
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124 if (second != null) { |
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125 logger.debug("Set the second axis dataset."); |
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126 plot.setDataset(1, second); |
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127 } |
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128 } |
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129 |
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130 |
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131 public void addFirstAxisSeries(XYSeries series) { |
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132 if (first == null) { |
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133 first = new XYSeriesCollection(); |
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134 } |
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135 |
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136 if (series != null) { |
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137 first.addSeries(series); |
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138 } |
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139 } |
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140 |
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141 |
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142 public void addSecondAxisSeries(XYSeries series) { |
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143 if (second == null) { |
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144 second = new XYSeriesCollection(); |
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145 } |
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146 |
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147 if (series != null) { |
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148 second.addSeries(series); |
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149 } |
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150 } |
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151 |
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152 |
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153 private void removeEmptyRangeAxes(XYPlot plot) { |
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154 if (first == null) { |
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155 plot.setRangeAxis(0, null); |
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156 } |
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157 |
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158 if (second == null) { |
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159 plot.setRangeAxis(1, null); |
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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 /** |
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165 * This method zooms the plot to the specified ranges in the attribute |
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166 * document or to the ranges specified by the min/max values in the |
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167 * datasets. <b>Note:</b> We determine the range manually if no zoom ranges |
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168 * are given, because JFreeCharts auto-zoom adds a margin to the left and |
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169 * right of the data area. |
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170 * |
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171 * @param plot The XYPlot. |
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172 */ |
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173 protected void autoZoom(XYPlot plot) { |
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174 logger.debug("Zoom to specified ranges."); |
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175 |
673
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176 Range xrange = getDomainAxisRange(); |
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177 Range yrange = getValueAxisRange(); |
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178 |
673
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179 for (int i = 0, num = plot.getDatasetCount(); i < num; i++) { |
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180 XYDataset dataset = plot.getDataset(i); |
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181 |
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182 if (dataset == null) { |
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183 continue; |
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184 } |
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185 |
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186 Range[] ranges = getRangesForDataset(dataset); |
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187 |
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188 if (i == 0) { |
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189 ValueAxis xaxis = plot.getDomainAxis(); |
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190 zoomX(plot, xaxis, ranges[0], xrange); |
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191 } |
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192 |
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193 ValueAxis yaxis = plot.getRangeAxis(i); |
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194 |
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195 if (yaxis == null) { |
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196 continue; |
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197 } |
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198 |
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199 zoomY(plot, yaxis, ranges[1], yrange); |
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200 } |
653
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201 } |
652
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202 |
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203 |
718
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204 protected boolean zoomX(XYPlot plot, ValueAxis axis, Range range, Range x) { |
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205 return zoom(plot, axis, range, x); |
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206 } |
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207 |
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208 |
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209 protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) { |
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210 return zoom(plot, axis, range, x); |
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211 } |
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212 |
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213 |
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214 /** |
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215 * Zooms the x axis to the range specified in the attribute document. |
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216 * |
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217 * @param plot The XYPlot. |
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218 * @param axis The axis the shoud be modified. |
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219 * @param range The whole range specified by a dataset. |
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220 * @param x A user defined range (null permitted). |
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221 * |
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222 * @return true, if a zoom range was specified, otherwise false. |
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223 */ |
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224 protected boolean zoom(XYPlot plot, ValueAxis axis, Range range, Range x) { |
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225 if (x != null) { |
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226 double min = range.getLowerBound(); |
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227 double max = range.getUpperBound(); |
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228 double diff = max > min ? max - min : min - max; |
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229 |
673
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230 Range computed = new Range( |
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231 min + x.getLowerBound() * diff, |
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232 min + x.getUpperBound() * diff); |
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233 |
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234 axis.setRangeWithMargins(computed); |
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235 |
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236 logger.debug("Zoom axis to: " + computed); |
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237 |
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238 return true; |
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239 } |
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240 |
717
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241 axis.setRangeWithMargins(range); |
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242 return false; |
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243 } |
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244 |
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245 |
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246 /** |
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247 * This method extracts the minimum and maximum values for x and y axes. |
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248 * |
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249 * @param dataset The dataset that should be observed. |
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250 * |
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251 * @return a Range[] as follows: [x-Range, y-Range]. |
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252 */ |
673
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253 public static Range[] getRangesForDataset(XYDataset dataset) { |
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254 double[] xr = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE }; |
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255 double[] yr = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE }; |
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256 |
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257 int sCount = dataset.getSeriesCount(); |
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258 |
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259 for (int i = 0; i < sCount; i++) { |
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260 int iCount = dataset.getItemCount(i); |
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261 |
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262 for (int j = 0; j < iCount; j++) { |
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263 double x = dataset.getX(i, j).doubleValue(); |
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264 double y = dataset.getY(i, j).doubleValue(); |
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265 |
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266 if (!Double.isNaN(x)) { |
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267 xr[0] = xr[0] < x ? xr[0] : x; |
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268 xr[1] = xr[1] > x ? xr[1] : x; |
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269 } |
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270 |
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271 if (!Double.isNaN(y)) { |
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272 yr[0] = yr[0] < y ? yr[0] : y; |
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273 yr[1] = yr[1] > y ? yr[1] : y; |
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274 } |
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275 } |
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276 } |
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277 |
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278 // this is only required, if there are no items in the dataset. |
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279 xr[0] = xr[0] < xr[1] ? xr[0] : xr[1]; |
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280 xr[1] = xr[1] > xr[0] ? xr[1] : xr[0]; |
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281 yr[0] = yr[0] < yr[1] ? yr[0] : yr[1]; |
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282 yr[1] = yr[1] > yr[0] ? yr[1] : yr[0]; |
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283 |
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284 return new Range[] {new Range(xr[0], xr[1]), new Range(yr[0], yr[1])}; |
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285 } |
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286 |
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287 |
369
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288 /** |
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289 * Adjusts the axes of a plot. |
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290 * |
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291 * @param plot The XYPlot of the chart. |
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292 */ |
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293 protected void adjustAxes(XYPlot plot) { |
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294 NumberAxis yAxis = (NumberAxis) plot.getRangeAxis(); |
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295 |
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296 yAxis.setAutoRangeIncludesZero(false); |
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297 } |
414
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298 |
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299 |
419
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300 protected void adjustPlot(XYPlot plot) { |
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301 Stroke gridStroke = new BasicStroke( |
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302 DEFAULT_GRID_LINE_WIDTH, |
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303 BasicStroke.CAP_BUTT, |
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304 BasicStroke.JOIN_MITER, |
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305 3.0f, |
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306 new float[] { 3.0f }, |
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307 0.0f); |
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308 |
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309 plot.setDomainGridlineStroke(gridStroke); |
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310 plot.setDomainGridlinePaint(DEFAULT_GRID_COLOR); |
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311 plot.setDomainGridlinesVisible(true); |
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312 |
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313 plot.setRangeGridlineStroke(gridStroke); |
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314 plot.setRangeGridlinePaint(DEFAULT_GRID_COLOR); |
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315 plot.setRangeGridlinesVisible(true); |
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316 |
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317 plot.setAxisOffset(new RectangleInsets(0d, 0d, 0d, 0d)); |
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318 |
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319 if (plot.getDataset(0) != null) { |
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320 plot.mapDatasetToRangeAxis(0, 0); |
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321 } |
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#135 Modified the way to store datasets for different chart axes.
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322 |
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#135 Modified the way to store datasets for different chart axes.
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parents:
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323 if (plot.getDataset(1) != null) { |
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#135 Modified the way to store datasets for different chart axes.
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324 plot.mapDatasetToRangeAxis(1, 1); |
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#135 Modified the way to store datasets for different chart axes.
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parents:
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325 } |
419
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Display gridlines in charts.
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326 } |
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Display gridlines in charts.
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327 |
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Display gridlines in charts.
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328 |
414
0385bcc4229a
Added subtitles to the available charts.
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329 protected void addSubtitles(JFreeChart chart) { |
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Added subtitles to the available charts.
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330 // override this method in subclasses that need subtitles |
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Added subtitles to the available charts.
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331 } |
369
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Implemented the chart creation of a longitudinal section chart - W and Q facets.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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332 } |
2ce7b473620e
Implemented the chart creation of a longitudinal section chart - W and Q facets.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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333 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |