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annotate flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java @ 924:f7761914f745

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An initial implementation to render chart series based on the XML configuration in themes.xml. flys-artifacts/trunk@2276 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 01 Jul 2011 14:46:13 +0000
parents 7ca4a287cd0e
children fd5c70973e0b
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.chart.renderer.xy.XYLineAndShapeRenderer;
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18 import org.jfree.data.Range;
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19 import org.jfree.data.xy.XYDataset;
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20 import org.jfree.data.xy.XYSeries;
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21 import org.jfree.data.xy.XYSeriesCollection;
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22
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23 import org.jfree.ui.RectangleInsets;
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25 import de.intevation.flys.exports.ChartExportHelper;
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26
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27
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28 /**
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29 * An abstract base class for creating XY charts.
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30 *
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31 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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32 */
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33 public abstract class XYChartGenerator extends ChartGenerator {
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34
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35 /** The logger that is used in this generator.*/
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36 private static Logger logger = Logger.getLogger(XYChartGenerator.class);
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38
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39 /** SeriesCollection used for the first axis.*/
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40 protected XYSeriesCollection first;
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41
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42 /** SeriesCollection used for the second axis.*/
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43 protected XYSeriesCollection second;
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44
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45
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46 public static final Color DEFAULT_GRID_COLOR = Color.GRAY;
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47 public static final float DEFAULT_GRID_LINE_WIDTH = 0.3f;
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48
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49
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50 /**
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51 * Returns the title of a chart.
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52 *
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53 * @return the title of a chart.
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54 */
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55 protected abstract String getChartTitle();
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56
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57 /**
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58 * Returns the X-Axis label of a chart.
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59 *
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60 * @return the X-Axis label of a chart.
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61 */
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62 protected abstract String getXAxisLabel();
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63
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64 /**
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65 * Returns the Y-Axis label of a chart.
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66 *
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67 * @return the Y-Axis label of a chart.
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68 */
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69 protected abstract String getYAxisLabel();
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70
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71
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72 public void generate()
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73 throws IOException
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74 {
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75 logger.debug("XYChartGenerator.generate");
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76
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77 JFreeChart chart = generateChart();
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78
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79 int[] size = getSize();
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80
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81 ChartExportHelper.exportImage(
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82 out,
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83 chart,
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84 "png",
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85 size[0], size[1]);
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86 }
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87
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88
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89 public JFreeChart generateChart() {
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90 logger.debug("XYChartGenerator.generateChart");
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91
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92 JFreeChart chart = ChartFactory.createXYLineChart(
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93 getChartTitle(),
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94 getXAxisLabel(),
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95 getYAxisLabel(),
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96 null,
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97 PlotOrientation.VERTICAL,
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98 true,
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99 false,
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100 false);
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101
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102 chart.setBackgroundPaint(Color.WHITE);
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103 chart.getPlot().setBackgroundPaint(Color.WHITE);
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104
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105 XYPlot plot = (XYPlot) chart.getPlot();
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106
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107 addDatasets(plot);
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108 addSubtitles(chart);
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109 adjustPlot(plot);
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110 adjustAxes(plot);
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111
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112 removeEmptyRangeAxes(plot);
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113
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114 autoZoom(plot);
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115
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116 applyThemes(plot);
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117
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118 return chart;
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119 }
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120
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121
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122 protected void addDatasets(XYPlot plot) {
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123 if (first != null) {
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124 logger.debug("Set the first axis dataset.");
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125 plot.setDataset(0, first);
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126 }
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127 if (second != null) {
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128 logger.debug("Set the second axis dataset.");
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129 plot.setDataset(1, second);
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130 }
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131 }
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132
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133
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134 public void addFirstAxisSeries(XYSeries series) {
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135 if (first == null) {
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136 first = new XYSeriesCollection();
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137 }
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138
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139 if (series != null) {
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140 first.addSeries(series);
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141 }
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142 }
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143
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144
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145 public void addSecondAxisSeries(XYSeries series) {
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146 if (second == null) {
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147 second = new XYSeriesCollection();
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148 }
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149
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150 if (series != null) {
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151 second.addSeries(series);
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152 }
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153 }
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154
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155
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156 private void removeEmptyRangeAxes(XYPlot plot) {
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157 if (first == null) {
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158 plot.setRangeAxis(0, null);
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159 }
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160
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161 if (second == null) {
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162 plot.setRangeAxis(1, null);
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163 }
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164 }
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165
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166
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167 /**
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168 * This method zooms the plot to the specified ranges in the attribute
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169 * document or to the ranges specified by the min/max values in the
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170 * datasets. <b>Note:</b> We determine the range manually if no zoom ranges
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171 * are given, because JFreeCharts auto-zoom adds a margin to the left and
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172 * right of the data area.
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173 *
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174 * @param plot The XYPlot.
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175 */
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176 protected void autoZoom(XYPlot plot) {
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177 logger.debug("Zoom to specified ranges.");
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178
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179 Range xrange = getDomainAxisRange();
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180 Range yrange = getValueAxisRange();
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181
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182 for (int i = 0, num = plot.getDatasetCount(); i < num; i++) {
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183 XYDataset dataset = plot.getDataset(i);
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184
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185 if (dataset == null) {
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186 continue;
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187 }
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188
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189 Range[] ranges = getRangesForDataset(dataset);
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190
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191 if (i == 0) {
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192 ValueAxis xaxis = plot.getDomainAxis();
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193 zoomX(plot, xaxis, ranges[0], xrange);
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194 }
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195
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196 ValueAxis yaxis = plot.getRangeAxis(i);
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197
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198 if (yaxis == null) {
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199 continue;
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200 }
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201
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202 zoomY(plot, yaxis, ranges[1], yrange);
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203 }
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204 }
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205
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206
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207 protected boolean zoomX(XYPlot plot, ValueAxis axis, Range range, Range x) {
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208 return zoom(plot, axis, range, x);
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209 }
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210
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211
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212 protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) {
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213 return zoom(plot, axis, range, x);
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214 }
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215
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216
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217 /**
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218 * Zooms the x axis to the range specified in the attribute document.
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219 *
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220 * @param plot The XYPlot.
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221 * @param axis The axis the shoud be modified.
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222 * @param range The whole range specified by a dataset.
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223 * @param x A user defined range (null permitted).
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224 *
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225 * @return true, if a zoom range was specified, otherwise false.
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226 */
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227 protected boolean zoom(XYPlot plot, ValueAxis axis, Range range, Range x) {
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228 if (x != null) {
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229 double min = range.getLowerBound();
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230 double max = range.getUpperBound();
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231 double diff = max > min ? max - min : min - max;
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232
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233 Range computed = new Range(
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234 min + x.getLowerBound() * diff,
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235 min + x.getUpperBound() * diff);
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236
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237 axis.setRangeWithMargins(computed);
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238
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239 logger.debug("Zoom axis to: " + computed);
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240
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241 return true;
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242 }
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243
717
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244 axis.setRangeWithMargins(range);
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245 return false;
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246 }
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247
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248
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249 /**
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250 * This method extracts the minimum and maximum values for x and y axes.
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251 *
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252 * @param dataset The dataset that should be observed.
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253 *
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254 * @return a Range[] as follows: [x-Range, y-Range].
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255 */
673
b22f21b173a7 Changed the zoom process - the values in the chart request document are percentual values that apply to every axis.
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256 public static Range[] getRangesForDataset(XYDataset dataset) {
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257 double[] xr = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE };
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258 double[] yr = new double[] { Double.MAX_VALUE, -Double.MAX_VALUE };
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259
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260 int sCount = dataset.getSeriesCount();
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261
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262 for (int i = 0; i < sCount; i++) {
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263 int iCount = dataset.getItemCount(i);
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264
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265 for (int j = 0; j < iCount; j++) {
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266 double x = dataset.getX(i, j).doubleValue();
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267 double y = dataset.getY(i, j).doubleValue();
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268
667
434146596838 Made the chart range determination more robust against NaN values.
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269 if (!Double.isNaN(x)) {
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270 xr[0] = xr[0] < x ? xr[0] : x;
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271 xr[1] = xr[1] > x ? xr[1] : x;
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272 }
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273
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274 if (!Double.isNaN(y)) {
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275 yr[0] = yr[0] < y ? yr[0] : y;
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276 yr[1] = yr[1] > y ? yr[1] : y;
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277 }
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278 }
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279 }
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280
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281 // this is only required, if there are no items in the dataset.
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282 xr[0] = xr[0] < xr[1] ? xr[0] : xr[1];
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283 xr[1] = xr[1] > xr[0] ? xr[1] : xr[0];
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284 yr[0] = yr[0] < yr[1] ? yr[0] : yr[1];
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285 yr[1] = yr[1] > yr[0] ? yr[1] : yr[0];
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286
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287 return new Range[] {new Range(xr[0], xr[1]), new Range(yr[0], yr[1])};
652
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288 }
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289
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290
369
2ce7b473620e Implemented the chart creation of a longitudinal section chart - W and Q facets.
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291 /**
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292 * Adjusts the axes of a plot.
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293 *
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294 * @param plot The XYPlot of the chart.
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295 */
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296 protected void adjustAxes(XYPlot plot) {
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297 NumberAxis yAxis = (NumberAxis) plot.getRangeAxis();
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298
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299 yAxis.setAutoRangeIncludesZero(false);
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300 }
414
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301
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302
419
4de7d9eac10f Display gridlines in charts.
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303 protected void adjustPlot(XYPlot plot) {
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304 Stroke gridStroke = new BasicStroke(
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305 DEFAULT_GRID_LINE_WIDTH,
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306 BasicStroke.CAP_BUTT,
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307 BasicStroke.JOIN_MITER,
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308 3.0f,
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309 new float[] { 3.0f },
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310 0.0f);
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311
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312 plot.setDomainGridlineStroke(gridStroke);
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313 plot.setDomainGridlinePaint(DEFAULT_GRID_COLOR);
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314 plot.setDomainGridlinesVisible(true);
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315
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316 plot.setRangeGridlineStroke(gridStroke);
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317 plot.setRangeGridlinePaint(DEFAULT_GRID_COLOR);
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318 plot.setRangeGridlinesVisible(true);
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319
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320 plot.setAxisOffset(new RectangleInsets(0d, 0d, 0d, 0d));
923
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321
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322 if (plot.getDataset(0) != null) {
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323 plot.mapDatasetToRangeAxis(0, 0);
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324 }
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325
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diff changeset
326 if (plot.getDataset(1) != null) {
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327 plot.mapDatasetToRangeAxis(1, 1);
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diff changeset
328 }
419
4de7d9eac10f Display gridlines in charts.
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diff changeset
329 }
4de7d9eac10f Display gridlines in charts.
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330
4de7d9eac10f Display gridlines in charts.
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331
414
0385bcc4229a Added subtitles to the available charts.
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diff changeset
332 protected void addSubtitles(JFreeChart chart) {
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diff changeset
333 // override this method in subclasses that need subtitles
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334 }
924
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335
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336
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337 protected void applyThemes(XYPlot plot) {
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338 if (first != null) {
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339 applyThemes(plot, first, 0);
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340 }
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341
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342 if (second != null) {
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343 applyThemes(plot, second, 1);
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344 }
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345 }
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346
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347
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diff changeset
348 protected void applyThemes(XYPlot plot, XYSeriesCollection dataset, int i) {
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349 XYLineAndShapeRenderer r = getRenderer(plot, i);
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350
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351 for (int s = 0, num = dataset.getSeriesCount(); s < num; s++) {
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352 XYSeries series = dataset.getSeries(s);
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353
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diff changeset
354 if (series instanceof StyledXYSeries) {
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
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355 ((StyledXYSeries) series).applyTheme(r, s);
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356 }
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
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357 }
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
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358
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
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diff changeset
359 plot.setRenderer(i, r);
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360 }
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
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361
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
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362
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
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diff changeset
363 protected XYLineAndShapeRenderer getRenderer(XYPlot plot, int idx) {
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364 XYLineAndShapeRenderer r =
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diff changeset
365 (XYLineAndShapeRenderer) plot.getRenderer(idx);
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
366
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
367 if (r != null) {
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
368 return r;
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
369 }
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
370
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
371 if (idx == 0) {
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
372 logger.warn("No default renderer set!");
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
373 return new XYLineAndShapeRenderer();
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
374 }
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
375
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
376 r = (XYLineAndShapeRenderer) plot.getRenderer(0);
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
377
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
378 try {
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
379 return (XYLineAndShapeRenderer) r.clone();
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
380 }
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
381 catch (CloneNotSupportedException cnse) {
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
382 logger.warn(cnse, cnse);
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
383 }
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
384
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
385 logger.warn("No applicalable renderer found!");
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
386
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
387 return new XYLineAndShapeRenderer();
f7761914f745 An initial implementation to render chart series based on the XML configuration in themes.xml.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 923
diff changeset
388 }
369
2ce7b473620e Implemented the chart creation of a longitudinal section chart - W and Q facets.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
389 }
2ce7b473620e Implemented the chart creation of a longitudinal section chart - W and Q facets.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
390 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org