Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/LegendProcessor.java @ 9496:d8e753d0fdb9

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stripedArea introduced for Assessment Scheme/Bewertungsschema
author gernotbelger
date Wed, 26 Sep 2018 15:48:05 +0200
parents 5e38e2924c07
children
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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Sascha L. Teichmann <teichmann@intevation.de>
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2 * Software engineering by Intevation GmbH
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3 *
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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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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 /** Class to process Plots legends. */
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23 public abstract class LegendProcessor {
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24
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25 /** (Empty) shape for aggregated Legend Items. */
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26 private static final Line2D.Double SPACE = new Line2D.Double(0, 0, 0, 0);
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27
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28 /** Prevent instantiations. */
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29 private LegendProcessor() {
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30 }
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31
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32 /**
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33 * Create a hash from a legenditem.
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34 * This hash can then be used to merge legend items labels.
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35 *
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36 * @return hash for given legenditem to identify mergeables.
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37 */
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38 protected static String legendItemHash(final LegendItem li) {
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39 // TODO Do proper implementation.
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40 // Ensure that only mergable sets are created.
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41 // getFillPaint()
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42 // getFillPaintTransformer()
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43 // getLabel()
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44 // getLine()
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45 // getLinePaint()
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46 // getLineStroke()
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47 // getOutminePaint()
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48 // getOutlineStroke()
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49 // Shape getShape()
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50 // String getToolTipText()
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51 // String getURLText()
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52 // boolean isLineVisible()
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53 // boolean isShapeFilled()
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54 // boolean isShapeOutlineVisible()
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55 // boolean isShapeVisible()
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56 final String hash = li.getLinePaint().toString();
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57 // XXX: DEAD CODE // String label = li.getLabel();
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58 /*
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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
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67 // WQ.java holds example of using regex Matcher/Pattern.
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68
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69 return hash;
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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 *
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75 * @param plot
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76 * The plot for which to modify the legend.
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77 * @param threshold
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78 * How many items are needed for aggregation to
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79 * be triggered?
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80 */
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81 public static void aggregateLegendEntries(final XYPlot plot, final int threshold) {
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82 final LegendItemCollection old = plot.getLegendItems();
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83 // Find "similar" entries if aggregation is enabled.
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84
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85 int maxListSize = 0;
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86 final int AGGR_THRESHOLD = threshold;
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87
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88 if (AGGR_THRESHOLD > old.getItemCount() || AGGR_THRESHOLD <= 0) {
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89 return;
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90 }
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91
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92 final HashMap<String, List<LegendItem>> entries = new LinkedHashMap<>();
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93 // for (Iterator<LegendItem> i = old.iterator(); i.hasNext();) {
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94
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95 final Iterator<LegendItem> iterator = old.iterator();
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96 while (iterator.hasNext()) {
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97 final LegendItem item = iterator.next();
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98 final String hash = legendItemHash(item);
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99 List<LegendItem> itemList = entries.get(hash);
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100 if (itemList == null) {
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101 itemList = new ArrayList<>();
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102 entries.put(hash, itemList);
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103 }
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104 itemList.add(item);
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105
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106 if (itemList.size() > maxListSize) {
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107 maxListSize = itemList.size();
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108 }
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109 }
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110
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111 if (maxListSize < AGGR_THRESHOLD) {
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112 // No need to do anything.
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113 return;
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114 }
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115
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116 // Run over collected entries, merge their names and create new
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117 // entry if needed.
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118 final LegendItemCollection newLegend = new LegendItemCollection();
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119 for (final List<LegendItem> itemList : entries.values()) {
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120 if (itemList.size() >= AGGR_THRESHOLD) {
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121 // Now do merging.
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122 // XXX: DEAD CODE // LegendItem item = itemList.get(0);
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123 // Unfortunately we cannot clone and just setDescription,
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124 // as this method was added in JFreeChart 1.0.14
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125 // (we are at .13).
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126
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127 // Remove the shapes of all but the first items,
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128 // to prevent "overfill" of legenditemblock.
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129 for (int i = 0, I = itemList.size(); i < I; i++) {
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130 if (i != 0) {
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131 final LegendItem litem = itemList.get(i);
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132
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133 // Make shape and line really small.
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134 final LegendItem merged = new LegendItem("," + litem.getLabel(), litem.getDescription(), litem.getToolTipText(), litem.getURLText(),
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parents: 8856
diff changeset
135 false, SPACE, false, litem.getFillPaint(), false, litem.getOutlinePaint(), litem.getOutlineStroke(), false, SPACE,
d8e753d0fdb9 stripedArea introduced for Assessment Scheme/Bewertungsschema
gernotbelger
parents: 8856
diff changeset
136 litem.getLineStroke(), litem.getLinePaint());
3183
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
137 newLegend.add(merged);
9496
d8e753d0fdb9 stripedArea introduced for Assessment Scheme/Bewertungsschema
gernotbelger
parents: 8856
diff changeset
138 } else {
3183
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
139 newLegend.add(itemList.get(i));
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
140 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
141 }
9496
d8e753d0fdb9 stripedArea introduced for Assessment Scheme/Bewertungsschema
gernotbelger
parents: 8856
diff changeset
142 } else {
3183
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
143 // Do not merge entries.
9496
d8e753d0fdb9 stripedArea introduced for Assessment Scheme/Bewertungsschema
gernotbelger
parents: 8856
diff changeset
144 for (final LegendItem li : itemList) {
3183
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
145 newLegend.add(li);
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 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
149
9496
d8e753d0fdb9 stripedArea introduced for Assessment Scheme/Bewertungsschema
gernotbelger
parents: 8856
diff changeset
150 plot.setFixedLegendItems(newLegend);
3183
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
151 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
152 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
153 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org