Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/LegendProcessor.java @ 5863:4897a58c8746

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River artifacts: Added new copyright headers.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:40:59 +0200
parents 5aa05a7a34b7
children af13ceeba52a
rev   line source
5863
4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
diff changeset
1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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2 * Software engineering by Intevation GmbH
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3 *
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Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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parents: 5838
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.exports;
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10
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11 import java.awt.geom.Line2D;
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12 import java.util.ArrayList;
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13 import java.util.HashMap;
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14 import java.util.Iterator;
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15 import java.util.LinkedHashMap;
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16 import java.util.List;
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17
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18 import org.jfree.chart.LegendItem;
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19 import org.jfree.chart.LegendItemCollection;
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20 import org.jfree.chart.plot.XYPlot;
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21
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22
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23 /** Class to process Plots legends. */
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24 public abstract class LegendProcessor {
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25
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26 /** (Empty) shape for aggregated Legend Items. */
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27 private static final Line2D.Double SPACE = new Line2D.Double(0,0,0,0);
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28
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29
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30 /** Prevent instantiations. */
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31 private LegendProcessor() {
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32 }
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33
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34
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35 /**
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36 * Create a hash from a legenditem.
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37 * This hash can then be used to merge legend items labels.
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38 * @return hash for given legenditem to identify mergeables.
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39 */
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40 protected static String legendItemHash(LegendItem li) {
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41 // TODO Do proper implementation. Ensure that only mergable sets are created.
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42 // getFillPaint()
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43 // getFillPaintTransformer()
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44 // getLabel()
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45 // getLine()
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46 // getLinePaint()
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47 // getLineStroke()
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48 // getOutminePaint()
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49 // getOutlineStroke()
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50 // Shape getShape()
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51 // String getToolTipText()
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52 // String getURLText()
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53 // boolean isLineVisible()
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54 // boolean isShapeFilled()
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55 // boolean isShapeOutlineVisible()
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56 // boolean isShapeVisible()
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57 String hash = li.getLinePaint().toString();
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58 // XXX: DEAD CODE // String label = li.getLabel();
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59 /*if (label.startsWith("W (") || label.startsWith("W(")) {
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60 hash += "-W-";
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61 }
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62 else if (label.startsWith("Q(") || label.startsWith("Q (")) {
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63 hash += "-Q-";
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64 }*/
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65
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66 // WQ.java holds example of using regex Matcher/Pattern.
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67
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68 return hash;
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69 }
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70
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71
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72 /**
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73 * Create new legend entries, dependent on settings.
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74 * @param plot The plot for which to modify the legend.
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75 * @param threshold How many items are needed for aggregation to
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76 * be triggered?
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77 */
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78 public static void aggregateLegendEntries(XYPlot plot, int threshold) {
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79 LegendItemCollection old = plot.getLegendItems();
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80 // Find "similar" entries if aggregation is enabled.
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81
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82 int maxListSize = 0;
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83 int AGGR_THRESHOLD = threshold;
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84
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85 if (AGGR_THRESHOLD > old.getItemCount() || AGGR_THRESHOLD <= 0){
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86 return;
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87 }
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88
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89 HashMap<String, List<LegendItem>> entries = new LinkedHashMap<String, List<LegendItem>>();
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90 for (Iterator<LegendItem> i = old.iterator(); i.hasNext();) {
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91 LegendItem item = i.next();
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92 String hash = legendItemHash(item);
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93 List<LegendItem> itemList = entries.get(hash);
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94 if (itemList == null) {
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95 itemList = new ArrayList<LegendItem>();
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96 entries.put(hash, itemList);
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97 }
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98 itemList.add(item);
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99
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100 if (itemList.size() > maxListSize) {
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101 maxListSize = itemList.size();
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102 }
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103 }
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104
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105 if (maxListSize < AGGR_THRESHOLD) {
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106 // No need to do anything.
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107 return;
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108 }
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109
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110 // Run over collected entries, merge their names and create new
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111 // entry if needed.
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112 LegendItemCollection newLegend = new LegendItemCollection();
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113 for (List<LegendItem> itemList: entries.values()) {
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114 if (itemList.size() >= AGGR_THRESHOLD) {
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115 // Now do merging.
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116 // XXX: DEAD CODE // LegendItem item = itemList.get(0);
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117 // Unfortunately we cannot clone and just setDescription, as this
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118 // method was added in JFreeChart 1.0.14 (we are at .13).
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119
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120 // Remove the shapes of all but the first items,
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121 // to prevent "overfill" of legenditemblock.
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122 for (int i = 0; i < itemList.size(); i++) {
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123 if (i != 0) {
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124 LegendItem litem = itemList.get(i);
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125
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126 // Make shape and line really small.
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127 LegendItem merged = new LegendItem(
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128 "," + litem.getLabel(), litem.getDescription(), litem.getToolTipText(),
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129 litem.getURLText(), false, SPACE,
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130 false, litem.getFillPaint(), false,
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131 litem.getOutlinePaint(), litem.getOutlineStroke(), false,
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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132 SPACE, litem.getLineStroke(), litem.getLinePaint());
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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133 newLegend.add(merged);
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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134 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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135 else {
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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136 newLegend.add(itemList.get(i));
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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137 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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138 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
139 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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140 else {
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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141 // Do not merge entries.
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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142 for (LegendItem li: itemList) {
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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143 newLegend.add(li);
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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144 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
145 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
146 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
147
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
148 plot.setFixedLegendItems (newLegend);
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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149 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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150 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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151 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org