Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/LegendProcessor.java @ 8856:5e38e2924c07 3.2.x

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix code style.
author Tom Gottfried <tom@intevation.de>
date Thu, 18 Jan 2018 20:12:01 +0100
parents fe32a7f9655e
children d8e753d0fdb9
rev   line source
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parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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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
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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.
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42 // Ensure that only mergable sets are created.
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43 // getFillPaint()
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44 // getFillPaintTransformer()
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45 // getLabel()
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46 // getLine()
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47 // getLinePaint()
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48 // getLineStroke()
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49 // getOutminePaint()
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50 // getOutlineStroke()
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51 // Shape getShape()
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52 // String getToolTipText()
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53 // String getURLText()
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54 // boolean isLineVisible()
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55 // boolean isShapeFilled()
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56 // boolean isShapeOutlineVisible()
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57 // boolean isShapeVisible()
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58 String hash = li.getLinePaint().toString();
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59 // XXX: DEAD CODE // String label = li.getLabel();
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60 /*if (label.startsWith("W (") || label.startsWith("W(")) {
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61 hash += "-W-";
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62 }
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63 else if (label.startsWith("Q(") || label.startsWith("Q (")) {
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64 hash += "-Q-";
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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 /**
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74 * Create new legend entries, dependent on settings.
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75 * @param plot The plot for which to modify the legend.
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76 * @param threshold How many items are needed for aggregation to
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77 * be triggered?
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78 */
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79 public static void aggregateLegendEntries(XYPlot plot, int threshold) {
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80 LegendItemCollection old = plot.getLegendItems();
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81 // Find "similar" entries if aggregation is enabled.
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82
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83 int maxListSize = 0;
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84 int AGGR_THRESHOLD = threshold;
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85
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86 if (AGGR_THRESHOLD > old.getItemCount() || AGGR_THRESHOLD <= 0){
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87 return;
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88 }
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89
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90 HashMap<String, List<LegendItem>> entries =
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91 new LinkedHashMap<String, List<LegendItem>>();
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92 for (Iterator<LegendItem> i = old.iterator(); i.hasNext();) {
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93 LegendItem item = i.next();
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94 String hash = legendItemHash(item);
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95 List<LegendItem> itemList = entries.get(hash);
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96 if (itemList == null) {
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97 itemList = new ArrayList<LegendItem>();
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98 entries.put(hash, itemList);
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99 }
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100 itemList.add(item);
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101
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102 if (itemList.size() > maxListSize) {
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103 maxListSize = itemList.size();
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104 }
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105 }
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106
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107 if (maxListSize < AGGR_THRESHOLD) {
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108 // No need to do anything.
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109 return;
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110 }
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111
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112 // Run over collected entries, merge their names and create new
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113 // entry if needed.
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114 LegendItemCollection newLegend = new LegendItemCollection();
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115 for (List<LegendItem> itemList: entries.values()) {
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116 if (itemList.size() >= AGGR_THRESHOLD) {
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117 // Now do merging.
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118 // XXX: DEAD CODE // LegendItem item = itemList.get(0);
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119 // Unfortunately we cannot clone and just setDescription,
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120 // as this method was added in JFreeChart 1.0.14
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121 // (we are at .13).
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122
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123 // Remove the shapes of all but the first items,
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124 // to prevent "overfill" of legenditemblock.
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125 for (int i = 0, I = itemList.size(); i < I; i++) {
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126 if (i != 0) {
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127 LegendItem litem = itemList.get(i);
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128
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129 // Make shape and line really small.
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130 LegendItem merged = new LegendItem(
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131 "," + litem.getLabel(),
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132 litem.getDescription(),
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133 litem.getToolTipText(),
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
134 litem.getURLText(),
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
135 false,
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
136 SPACE,
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
137 false,
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
138 litem.getFillPaint(),
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
139 false,
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
140 litem.getOutlinePaint(),
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
141 litem.getOutlineStroke(),
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
142 false,
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
143 SPACE,
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
144 litem.getLineStroke(),
5e38e2924c07 Fix code style.
Tom Gottfried <tom@intevation.de>
parents: 7254
diff changeset
145 litem.getLinePaint());
3183
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
146 newLegend.add(merged);
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 else {
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
149 newLegend.add(itemList.get(i));
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
150 }
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 else {
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
154 // Do not merge entries.
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
155 for (LegendItem li: itemList) {
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
156 newLegend.add(li);
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
157 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
158 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
159 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
160
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
161 plot.setFixedLegendItems (newLegend);
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
162 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
163 }
05c84d65988a Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff changeset
164 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org