Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/CollisionFreeXYTextAnnotation.java @ 2648:8aaa7f4ce06a
Let theme define whether or not to display a (yet static) label for line).
flys-artifacts/trunk@4306 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Thu, 26 Apr 2012 09:51:13 +0000 |
parents | 0b8c04c7f762 |
children | e19ff9086035 |
rev | line source |
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2157
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1 package de.intevation.flys.jfree; |
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2 |
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3 import org.apache.log4j.Logger; |
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4 |
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5 import java.util.Iterator; |
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6 |
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7 import java.awt.Shape; |
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8 import java.awt.geom.Rectangle2D; |
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9 |
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Avoid that annotations like the ones used for hyks prevent manual point text annotation rendering.
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10 import org.jfree.chart.entity.EntityCollection; |
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11 import org.jfree.chart.annotations.XYTextAnnotation; |
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12 import org.jfree.chart.axis.ValueAxis; |
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13 import org.jfree.chart.plot.PlotOrientation; |
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14 import org.jfree.chart.plot.XYPlot; |
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15 import org.jfree.chart.entity.XYAnnotationEntity; |
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16 import org.jfree.chart.plot.PlotRenderingInfo; |
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17 import org.jfree.chart.plot.Plot; |
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18 |
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19 import org.jfree.text.TextUtilities; |
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20 |
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21 import org.jfree.ui.RectangleEdge; |
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22 |
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23 |
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24 /** |
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25 * Custom Annotations class that is drawn only if no collisions with other |
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26 * already drawn CustomAnnotations in current plot are found. |
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27 */ |
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28 public class CollisionFreeXYTextAnnotation extends XYTextAnnotation { |
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29 |
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30 /** Logger for this class. */ |
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31 private static Logger logger = |
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32 Logger.getLogger(CollisionFreeXYTextAnnotation.class); |
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33 |
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Somewhat unified Annotation handling, use jfreechart-house-toolkit instead of custom StickyAxisAnnotation.
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34 |
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35 public CollisionFreeXYTextAnnotation(String text, double x, double y) { |
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36 super(text, x, y); |
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37 } |
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38 |
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39 |
c4ceade9d50e
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40 /** |
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41 * Draw the Annotation only if it does not collide with other |
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42 * already drawn Annotations- texts. |
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43 * |
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44 * @param g2 the graphics device. |
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45 * @param plot the plot. |
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46 * @param dataArea the data area. |
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47 * @param domainAxis the domain axis. |
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48 * @param rangeAxis the range axis. |
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49 * @param rendererIndex the render index. |
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50 * @param info state information, escpecially collects info about |
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51 * already drawn shapes (and thus annotations), used |
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52 * for collision detection. |
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53 */ |
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54 @Override |
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55 public void draw( |
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56 java.awt.Graphics2D g2, |
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57 XYPlot plot, |
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58 java.awt.geom.Rectangle2D dataArea, |
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59 ValueAxis domainAxis, |
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60 ValueAxis rangeAxis, |
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61 int rendererIndex, |
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62 PlotRenderingInfo info |
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63 ) { |
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64 // From superclass, adjusted access only. |
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65 PlotOrientation orientation = plot.getOrientation(); |
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66 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation( |
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67 plot.getDomainAxisLocation(), orientation); |
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68 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation( |
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69 plot.getRangeAxisLocation(), orientation); |
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70 |
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71 float anchorX = (float) domainAxis.valueToJava2D( |
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72 this.getX(), dataArea, domainEdge); |
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73 float anchorY = (float) rangeAxis.valueToJava2D( |
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74 this.getY(), dataArea, rangeEdge); |
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75 |
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76 if (orientation == PlotOrientation.HORIZONTAL) { |
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77 float tempAnchor = anchorX; |
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78 anchorX = anchorY; |
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79 anchorY = tempAnchor; |
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80 } |
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81 |
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82 g2.setFont(getFont()); |
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83 Shape hotspot = TextUtilities.calculateRotatedStringBounds( |
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84 getText(), g2, anchorX, anchorY, getTextAnchor(), |
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85 getRotationAngle(), getRotationAnchor()); |
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86 |
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87 // Deviation from superclass: prevent collision. |
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88 Rectangle2D hotspotBox = hotspot.getBounds2D(); |
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89 |
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90 for (Iterator i = info.getOwner().getEntityCollection().iterator(); |
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91 i.hasNext(); ) { |
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92 Object next = i.next(); |
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93 // Collision with other stuff than XYAnnotations are okay. |
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94 if (next instanceof CollisionFreeXYTextAnnotationEntity) { |
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95 XYAnnotationEntity drawnShape = (XYAnnotationEntity) next; |
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96 if (drawnShape.getArea().intersects(hotspotBox)) { |
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97 // Found collision, early stop. |
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98 return; |
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99 } |
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100 } |
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101 } |
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102 |
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103 if (this.getBackgroundPaint() != null) { |
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104 g2.setPaint(this.getBackgroundPaint()); |
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105 g2.fill(hotspot); |
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106 } |
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107 g2.setPaint(getPaint()); |
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108 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY, |
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109 getTextAnchor(), getRotationAngle(), getRotationAnchor()); |
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110 if (this.isOutlineVisible()) { |
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111 g2.setStroke(this.getOutlineStroke()); |
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112 g2.setPaint(this.getOutlinePaint()); |
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113 g2.draw(hotspot); |
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114 } |
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115 |
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116 //String toolTip = getToolTipText(); |
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117 //String url = getURL(); |
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118 String toolTip = "CollisionFreeXYTextAnnotation"; |
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119 String url = toolTip; |
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120 |
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121 if (toolTip != null || url != null) { |
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122 addEntity(info, hotspot, rendererIndex, toolTip, url); |
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123 } |
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124 else { |
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125 addEntity(info, hotspot, rendererIndex, |
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126 "CollisionFreeXYTextAnnotation", |
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127 "CollisionFreeXYTextAnnotation"); |
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128 } |
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129 } |
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130 |
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131 /** |
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132 * A utility method for adding an {@link CollisionFreeXYAnnotationEntity} to |
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133 * a {@link PlotRenderingInfo} instance. |
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134 * |
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135 * @param info the plot rendering info (<code>null</code> permitted). |
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136 * @param hotspot the hotspot area. |
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137 * @param rendererIndex the renderer index. |
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138 * @param toolTipText the tool tip text. |
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139 * @param urlText the URL text. |
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140 */ |
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141 protected void addEntity(PlotRenderingInfo info, |
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142 Shape hotspot, int rendererIndex, |
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143 String toolTipText, String urlText) { |
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144 if (info == null) { |
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145 return; |
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146 } |
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147 EntityCollection entities = info.getOwner().getEntityCollection(); |
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148 if (entities == null) { |
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149 return; |
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150 } |
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151 CollisionFreeXYTextAnnotationEntity entity = |
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152 new CollisionFreeXYTextAnnotationEntity(hotspot, |
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153 rendererIndex, toolTipText, urlText); |
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154 entities.add(entity); |
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155 } |
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156 } |
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157 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |