Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/LegendProcessor.java @ 4021:7cc05da7e35c
Add message for 'state.chart.km'
author | Christian Lins <christian.lins@intevation.de> |
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date | Thu, 04 Oct 2012 10:57:24 +0200 |
parents | 075f1ba25758 |
children | ca208b2f35a0 |
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 import java.util.Map; |
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10 |
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11 import org.jfree.chart.LegendItem; |
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12 import org.jfree.chart.LegendItemCollection; |
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13 import org.jfree.chart.plot.XYPlot; |
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14 |
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15 |
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16 /** Class to process Plots legends. */ |
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17 public abstract class LegendProcessor { |
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18 |
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19 /** (Empty) shape for aggregated Legend Items. */ |
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20 private static final Line2D.Double SPACE = new Line2D.Double(0,0,0,0); |
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21 |
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22 |
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23 /** Prevent instantiations. */ |
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24 private LegendProcessor() { |
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25 } |
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26 |
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27 |
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28 /** |
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29 * Create a hash from a legenditem. |
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30 * This hash can then be used to merge legend items labels. |
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31 * @return hash for given legenditem to identify mergeables. |
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32 */ |
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33 protected static String legendItemHash(LegendItem li) { |
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34 // TODO Do proper implementation. Ensure that only mergable sets are created. |
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35 // getFillPaint() |
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36 // getFillPaintTransformer() |
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37 // getLabel() |
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38 // getLine() |
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39 // getLinePaint() |
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40 // getLineStroke() |
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41 // getOutminePaint() |
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42 // getOutlineStroke() |
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43 // Shape getShape() |
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44 // String getToolTipText() |
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45 // String getURLText() |
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46 // boolean isLineVisible() |
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47 // boolean isShapeFilled() |
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48 // boolean isShapeOutlineVisible() |
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49 // boolean isShapeVisible() |
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50 String hash = li.getLinePaint().toString(); |
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51 String label = li.getLabel(); |
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52 /*if (label.startsWith("W (") || label.startsWith("W(")) { |
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53 hash += "-W-"; |
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54 } |
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55 else if (label.startsWith("Q(") || label.startsWith("Q (")) { |
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56 hash += "-Q-"; |
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57 }*/ |
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58 |
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59 // WQ.java holds example of using regex Matcher/Pattern. |
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60 |
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61 return hash; |
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62 } |
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63 |
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64 |
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65 /** |
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66 * Create new legend entries, dependent on settings. |
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67 * @param plot The plot for which to modify the legend. |
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68 * @param threshold How many items are needed for aggregation to |
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69 * be triggered? |
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70 */ |
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71 public static void aggregateLegendEntries(XYPlot plot, int threshold) { |
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72 LegendItemCollection old = plot.getLegendItems(); |
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73 // Find "similar" entries if aggregation is enabled. |
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74 |
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75 int maxListSize = 0; |
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76 int AGGR_THRESHOLD = threshold; |
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77 |
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78 if (AGGR_THRESHOLD > old.getItemCount() || AGGR_THRESHOLD <= 0){ |
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79 return; |
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80 } |
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81 |
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82 HashMap<String, List<LegendItem>> entries = new LinkedHashMap<String, List<LegendItem>>(); |
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83 for (Iterator<LegendItem> i = old.iterator(); i.hasNext();) { |
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84 LegendItem item = i.next(); |
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85 String hash = legendItemHash(item); |
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86 List<LegendItem> itemList = entries.get(hash); |
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87 if (itemList == null) { |
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88 itemList = new ArrayList<LegendItem>(); |
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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 entries.put(legendItemHash(item), itemList); |
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97 } |
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98 |
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99 if (maxListSize < AGGR_THRESHOLD) { |
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100 // No need to do anything. |
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101 return; |
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102 } |
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103 |
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104 // Run over collected entries, merge their names and create new |
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105 // entry if needed. |
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106 LegendItemCollection newLegend = new LegendItemCollection(); |
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107 for (Map.Entry<String, List<LegendItem>> cursor: entries.entrySet()) { |
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108 List<LegendItem> itemList = cursor.getValue(); |
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109 if (itemList.size() >= AGGR_THRESHOLD) { |
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110 // Now do merging. |
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111 LegendItem item = itemList.get(0); |
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112 // Unfortunately we cannot clone and just setDescription, as this |
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113 // method was added in JFreeChart 1.0.14 (we are at .13). |
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114 |
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115 // Remove the shapes of all but the first items, |
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116 // to prevent "overfill" of legenditemblock. |
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117 for (int i = 0; i < itemList.size(); i++) { |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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118 if (i != 0) { |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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119 LegendItem litem = itemList.get(i); |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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120 |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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121 // Make shape and line really small. |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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122 LegendItem merged = new LegendItem( |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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123 "," + litem.getLabel(), litem.getDescription(), litem.getToolTipText(), |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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124 litem.getURLText(), false, SPACE, |
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Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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125 false, litem.getFillPaint(), false, |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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126 litem.getOutlinePaint(), litem.getOutlineStroke(), false, |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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127 SPACE, litem.getLineStroke(), litem.getLinePaint()); |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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128 newLegend.add(merged); |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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129 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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changeset
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130 else { |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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131 newLegend.add(itemList.get(i)); |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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132 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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133 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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134 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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135 else { |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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136 // Do not merge entries. |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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changeset
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137 for (LegendItem li: itemList) { |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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changeset
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138 newLegend.add(li); |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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139 } |
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 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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142 |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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changeset
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143 plot.setFixedLegendItems (newLegend); |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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144 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
diff
changeset
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145 } |
05c84d65988a
Extracted legenditemaggregation from xychartgenerator.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
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146 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |