Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/LegendProcessor.java @ 4339:ff83ec9b4c0b
FixWQCurveGenerator: For extreme_wq_curves, add marker to indicate where extrapolation starts.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 31 Oct 2012 14:09:36 +0100 |
parents | 3dc26ec2558d |
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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.geom.Line2D; |
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4 import java.util.ArrayList; |
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5 import java.util.HashMap; |
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6 import java.util.Iterator; |
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7 import java.util.LinkedHashMap; |
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8 import java.util.List; |
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9 |
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10 import org.jfree.chart.LegendItem; |
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11 import org.jfree.chart.LegendItemCollection; |
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12 import org.jfree.chart.plot.XYPlot; |
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13 |
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14 |
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15 /** Class to process Plots legends. */ |
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16 public abstract class LegendProcessor { |
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17 |
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18 /** (Empty) shape for aggregated Legend Items. */ |
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19 private static final Line2D.Double SPACE = new Line2D.Double(0,0,0,0); |
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20 |
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21 |
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22 /** Prevent instantiations. */ |
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23 private LegendProcessor() { |
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24 } |
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25 |
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26 |
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27 /** |
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28 * Create a hash from a legenditem. |
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29 * This hash can then be used to merge legend items labels. |
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30 * @return hash for given legenditem to identify mergeables. |
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31 */ |
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32 protected static String legendItemHash(LegendItem li) { |
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33 // TODO Do proper implementation. Ensure that only mergable sets are created. |
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34 // getFillPaint() |
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35 // getFillPaintTransformer() |
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36 // getLabel() |
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37 // getLine() |
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38 // getLinePaint() |
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39 // getLineStroke() |
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40 // getOutminePaint() |
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41 // getOutlineStroke() |
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42 // Shape getShape() |
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43 // String getToolTipText() |
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44 // String getURLText() |
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45 // boolean isLineVisible() |
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46 // boolean isShapeFilled() |
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47 // boolean isShapeOutlineVisible() |
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48 // boolean isShapeVisible() |
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49 String hash = li.getLinePaint().toString(); |
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50 // XXX: DEAD CODE // String label = li.getLabel(); |
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51 /*if (label.startsWith("W (") || label.startsWith("W(")) { |
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52 hash += "-W-"; |
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53 } |
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54 else if (label.startsWith("Q(") || label.startsWith("Q (")) { |
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55 hash += "-Q-"; |
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56 }*/ |
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57 |
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58 // WQ.java holds example of using regex Matcher/Pattern. |
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59 |
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60 return hash; |
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61 } |
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62 |
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63 |
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64 /** |
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65 * Create new legend entries, dependent on settings. |
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66 * @param plot The plot for which to modify the legend. |
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67 * @param threshold How many items are needed for aggregation to |
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68 * be triggered? |
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69 */ |
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70 public static void aggregateLegendEntries(XYPlot plot, int threshold) { |
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71 LegendItemCollection old = plot.getLegendItems(); |
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72 // Find "similar" entries if aggregation is enabled. |
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73 |
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74 int maxListSize = 0; |
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75 int AGGR_THRESHOLD = threshold; |
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76 |
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77 if (AGGR_THRESHOLD > old.getItemCount() || AGGR_THRESHOLD <= 0){ |
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78 return; |
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79 } |
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80 |
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81 HashMap<String, List<LegendItem>> entries = new LinkedHashMap<String, List<LegendItem>>(); |
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82 for (Iterator<LegendItem> i = old.iterator(); i.hasNext();) { |
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83 LegendItem item = i.next(); |
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84 String hash = legendItemHash(item); |
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85 List<LegendItem> itemList = entries.get(hash); |
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86 if (itemList == null) { |
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87 itemList = new ArrayList<LegendItem>(); |
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88 entries.put(hash, itemList); |
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89 } |
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90 itemList.add(item); |
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91 |
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92 if (itemList.size() > maxListSize) { |
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93 maxListSize = itemList.size(); |
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94 } |
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95 } |
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96 |
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97 if (maxListSize < AGGR_THRESHOLD) { |
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98 // No need to do anything. |
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99 return; |
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100 } |
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101 |
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102 // Run over collected entries, merge their names and create new |
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103 // entry if needed. |
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104 LegendItemCollection newLegend = new LegendItemCollection(); |
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105 for (List<LegendItem> itemList: entries.values()) { |
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106 if (itemList.size() >= AGGR_THRESHOLD) { |
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107 // Now do merging. |
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108 // XXX: DEAD CODE // LegendItem item = itemList.get(0); |
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109 // Unfortunately we cannot clone and just setDescription, as this |
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110 // method was added in JFreeChart 1.0.14 (we are at .13). |
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111 |
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112 // Remove the shapes of all but the first items, |
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113 // to prevent "overfill" of legenditemblock. |
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114 for (int i = 0; i < itemList.size(); i++) { |
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115 if (i != 0) { |
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116 LegendItem litem = itemList.get(i); |
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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117 |
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118 // Make shape and line really small. |
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119 LegendItem merged = new LegendItem( |
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120 "," + litem.getLabel(), litem.getDescription(), litem.getToolTipText(), |
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121 litem.getURLText(), false, SPACE, |
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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122 false, litem.getFillPaint(), false, |
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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123 litem.getOutlinePaint(), litem.getOutlineStroke(), false, |
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124 SPACE, litem.getLineStroke(), litem.getLinePaint()); |
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125 newLegend.add(merged); |
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126 } |
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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127 else { |
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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128 newLegend.add(itemList.get(i)); |
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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129 } |
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Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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130 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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131 } |
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Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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132 else { |
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parents:
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133 // Do not merge entries. |
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134 for (LegendItem li: itemList) { |
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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135 newLegend.add(li); |
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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136 } |
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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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changeset
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138 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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139 |
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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140 plot.setFixedLegendItems (newLegend); |
05c84d65988a
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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141 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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142 } |
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parents:
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143 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |