Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/PolygonRenderer.java @ 1068:a4e490e0af5b
Enable GetFeatureInforRequests on all layer
gnv-artifacts/trunk@1163 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Tim Englich <tim.englich@intevation.de> |
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date | Mon, 07 Jun 2010 12:17:57 +0000 |
parents | 22c18083225e |
children | f953c9a559d8 |
rev | line source |
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1 package de.intevation.gnv.jfreechart; |
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2 |
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3 import java.awt.BasicStroke; |
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4 import java.awt.Color; |
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5 import java.awt.Font; |
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6 import java.awt.FontMetrics; |
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7 import java.awt.Graphics2D; |
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8 import java.awt.Paint; |
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9 import java.awt.Shape; |
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10 |
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11 import java.awt.geom.GeneralPath; |
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12 |
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13 import java.awt.geom.Rectangle2D.Double; |
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14 |
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15 import java.awt.geom.Rectangle2D; |
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16 |
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17 import java.util.ArrayList; |
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18 |
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19 import org.apache.log4j.Logger; |
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20 |
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21 import org.jfree.chart.axis.ValueAxis; |
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22 |
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23 import org.jfree.data.Range; |
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24 |
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25 import org.jfree.text.TextUtilities; |
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26 |
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27 import org.jfree.ui.RectangleEdge; |
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28 |
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29 /** |
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30 * This renderer is used to draw polygons into a Graphics object. |
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31 * |
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32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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33 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> |
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34 */ |
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35 public class PolygonRenderer |
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36 { |
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37 private static Logger log = Logger.getLogger( |
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38 PolygonRenderer.class); |
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39 |
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40 /** |
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41 * This interfaces describes a single method to retrieve a Paint object |
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42 * for a given index. |
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43 */ |
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44 public interface PaintLookup { |
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45 |
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46 /** |
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47 * |
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48 * @param index Index. |
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49 * @return Paint |
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50 */ |
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51 Paint getPaint(int index); |
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52 |
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53 } // interface PaintLookup |
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54 |
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55 /** |
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56 * This class is used to generate labels for a given series. |
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57 */ |
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58 public static class DefaultLabelGenerator |
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59 implements PolygonSeriesLabelGenerator |
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60 { |
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61 /** |
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62 * Construts an empty DefaultLabelGenerator. |
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63 */ |
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64 public DefaultLabelGenerator() { |
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65 } |
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66 |
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67 /** |
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68 * |
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69 * @param series A PolygonSeries. |
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70 * @return The label of series. |
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71 */ |
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72 public String generateLabel(PolygonSeries series) { |
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73 Object label = series.getAttribute("label"); |
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74 return label != null |
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75 ? toString(label) |
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76 : null; |
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77 } |
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78 |
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79 /** |
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80 * |
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81 * @param label Object |
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82 * @return String representaton of label. |
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83 */ |
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84 protected String toString(Object label) { |
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85 return label.toString(); |
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86 } |
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87 } // class DefaultLabelGenerator |
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88 |
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89 /** |
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90 * Constructor. |
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91 */ |
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92 public static final PolygonSeriesLabelGenerator |
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93 DEFAULT_LABEL_GENERATOR_INSTANCE = new DefaultLabelGenerator(); |
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94 |
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95 protected PaintLookup lookup; |
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96 |
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97 protected PolygonSeriesLabelGenerator labelGenerator; |
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98 |
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99 |
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100 public PolygonRenderer(PaintLookup lookup) { |
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101 this(lookup, null); |
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102 } |
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103 |
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104 |
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105 public PolygonRenderer( |
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106 PaintLookup lookup, |
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107 PolygonSeriesLabelGenerator labelGenerator |
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108 ) { |
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109 this.lookup = lookup; |
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110 this.labelGenerator = labelGenerator; |
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111 } |
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112 |
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113 /** |
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114 * This method draws polygons of each series in <code>dataset</code> into |
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115 * the given graphics object. If a polygon has no attribute 'fill', we |
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116 * expect that it is a line, otherwise the polygon is filled. |
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117 * |
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118 */ |
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119 public void drawPolygons( |
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120 Graphics2D graphics, |
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121 PolygonPlot plot, |
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122 Rectangle2D area, |
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123 PolygonDataset dataset |
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124 ) { |
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125 int seriesCount = dataset.getSeriesCount(); |
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126 for (int i = 0; i < seriesCount; i++) { |
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127 PolygonSeries series = dataset.getSeries(i); |
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128 Integer colorIdx = (Integer)series.getAttribute("fill"); |
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129 |
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130 if (colorIdx != null) { |
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131 Paint paint = lookup.getPaint(colorIdx.intValue()); |
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132 graphics.setPaint(paint != null ? paint : Color.black); |
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133 graphics.fill(constructShape(plot, area, series, true)); |
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134 } |
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135 else { |
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136 Number lineWidth = (Number)series.getAttribute("line.width"); |
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137 BasicStroke stroke = new BasicStroke( |
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138 lineWidth != null ? lineWidth.floatValue() : 1f); |
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139 graphics.setStroke(stroke); |
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140 graphics.setPaint(Color.black); |
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141 graphics.draw(constructShape(plot, area, series, false)); |
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142 } |
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143 } |
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144 } |
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145 |
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146 /** |
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147 * Draw labels at each item of a series in the given dataset. If the series |
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148 * has no label attritue, no label is drawn. |
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149 * |
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150 */ |
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151 public void drawLabels( |
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152 final Graphics2D graphics, |
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153 final PolygonPlot plot, |
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154 final Rectangle2D area, |
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155 PolygonDataset dataset |
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156 ) { |
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157 if (labelGenerator == null) { |
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158 return; |
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159 } |
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160 |
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161 final ArrayList<Rectangle2D> bboxes = new ArrayList<Rectangle2D>(); |
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162 |
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163 Font font = graphics.getFont(); |
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164 font = font.deriveFont(Font.PLAIN, Math.max(8, font.getSize()-3)); |
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165 graphics.setFont(font); |
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166 FontMetrics metrics = graphics.getFontMetrics(font); |
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167 |
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168 for (int i = dataset.getSeriesCount()-1; i >= 0; --i) { |
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169 PolygonSeries series = dataset.getSeries(i); |
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170 |
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171 String label = labelGenerator.generateLabel(series); |
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172 if (label == null) { |
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173 continue; |
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174 } |
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175 |
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176 final Rectangle2D box = TextUtilities.getTextBounds( |
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177 label, graphics, metrics); |
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178 |
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179 for (int j = series.getItemCount()-1; j >= 0; --j) { |
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180 final CompactXYItems ring = series.getItem(j); |
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181 LevelOrderIndices loi = new LevelOrderIndices(ring.size()-1); |
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182 Rectangle2D r = (Rectangle2D)loi.visit( |
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183 new LevelOrderIndices.Visitor() |
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184 { |
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185 ValueAxis da = plot.getDomainAxis(); |
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186 ValueAxis ra = plot.getRangeAxis(); |
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187 RectangleEdge de = plot.getDomainAxisEdge(); |
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188 RectangleEdge re = plot.getRangeAxisEdge(); |
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189 Rectangle2D.Double r = new Rectangle2D.Double( |
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190 0d, 0d, box.getWidth(), box.getHeight()); |
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191 |
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192 public Object visit(int index) { |
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193 r.x = da.valueToJava2D(ring.getX(index), area, de) |
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194 - 0.5*box.getWidth(); |
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195 r.y = ra.valueToJava2D(ring.getY(index), area, re) |
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196 + 0.5*box.getHeight(); |
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197 |
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198 for (Rectangle2D b: bboxes) { |
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199 if (b.intersects(r)) { |
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200 return null; |
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201 } |
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202 } |
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203 return r; |
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204 } |
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205 }); |
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206 |
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207 if (r != null) { |
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208 bboxes.add(r); |
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209 graphics.drawString( |
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210 label, (float)r.getX(), (float)r.getY()); |
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211 } |
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212 } // for all items in series |
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213 } // for all series |
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214 } |
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215 |
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216 /** |
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217 * Creates a shape made up of the CompactXYItems object stored in the given |
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218 * series. |
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219 * |
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220 * @param plot The plot. |
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221 * @param area The boundary. |
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222 * @param series The series storing the items. |
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223 * @param close Specifies if the polygon should be closed or not. |
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224 * @return the constructed shape. |
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225 */ |
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226 protected Shape constructShape( |
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227 PolygonPlot plot, |
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228 Rectangle2D area, |
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229 PolygonSeries series, |
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230 boolean close |
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231 ) { |
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232 ValueAxis da = plot.getDomainAxis(); |
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233 ValueAxis ra = plot.getRangeAxis(); |
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234 RectangleEdge de = plot.getDomainAxisEdge(); |
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235 RectangleEdge re = plot.getRangeAxisEdge(); |
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236 |
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237 CompactXYItems [] rings = series.getRings(); |
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238 GeneralPath path = new GeneralPath(); |
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239 |
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240 for (int i = 0; i < rings.length; ++i) { |
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241 |
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242 CompactXYItems ring = rings[i]; |
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243 |
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244 double [] data = ring.getData(); |
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245 |
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246 if (data.length >= 2) { |
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247 path.moveTo( |
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248 (float)da.valueToJava2D(data[0], area, de), |
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249 (float)ra.valueToJava2D(data[1], area, re)); |
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250 } |
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251 for (int j = 2; j < data.length;) { |
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252 path.lineTo( |
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253 (float)da.valueToJava2D(data[j++], area, de), |
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254 (float)ra.valueToJava2D(data[j++], area, re)); |
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255 } |
437
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256 if (close) { |
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257 path.closePath(); |
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258 } |
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259 } |
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260 return path; |
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261 } |
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262 |
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263 /** |
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264 * Retrieves the bounding box of a dataset. |
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265 */ |
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266 public Rectangle2D getBoundingBox(PolygonDataset dataset) { |
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267 Rectangle2D bbox = null; |
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268 |
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269 for (int i = 0, N = dataset.getSeriesCount(); i < N; i++) { |
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270 Range domain = dataset.getSeries(i).getDomainBounds(); |
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271 Range range = dataset.getSeries(i).getRangeBounds(); |
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272 |
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273 double x = domain.getLowerBound(); |
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274 double y = range.getLowerBound(); |
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275 double w = Math.abs(domain.getUpperBound() - x); |
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276 double h = Math.abs(range.getUpperBound() - y); |
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277 |
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278 if (bbox == null) { |
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279 bbox = new Rectangle2D.Double(x, y, w, h); |
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280 } |
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281 else { |
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282 bbox.add(new Rectangle2D.Double(x, y, w, h)); |
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283 } |
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284 } |
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285 |
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286 return bbox; |
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287 } |
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288 |
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289 /** |
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290 * |
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291 * @return the bounds of a series. |
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292 */ |
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293 public Rectangle2D getBounds(PolygonSeries series) { |
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294 |
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295 Range domain = series.getDomainBounds(); |
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296 Range range = series.getRangeBounds(); |
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297 |
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298 return new Rectangle2D.Double( |
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299 domain.getLowerBound(), range.getLowerBound(), |
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300 domain.getUpperBound(), range.getUpperBound() |
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301 ); |
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302 } |
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303 } |
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304 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |