Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/CollisionFreeXYTextAnnotation.java @ 3468:f37e7e8907cb

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merged flys-artifacts/2.8.1
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:39 +0200
parents 0f7abd95c6e2
children 6ed8ebd48d6e
rev   line source
2157
c4ceade9d50e Added new Annotation class that prevents collisions (to replace StickyAxisAnnotation).
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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.awt.Shape;
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6 import java.awt.geom.Rectangle2D;
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7
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8 import org.jfree.chart.entity.EntityCollection;
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9 import org.jfree.chart.annotations.XYTextAnnotation;
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10 import org.jfree.chart.axis.ValueAxis;
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11 import org.jfree.chart.plot.PlotOrientation;
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12 import org.jfree.chart.plot.XYPlot;
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13 import org.jfree.chart.entity.XYAnnotationEntity;
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14 import org.jfree.chart.plot.PlotRenderingInfo;
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15 import org.jfree.chart.plot.Plot;
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16
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17 import org.jfree.text.TextUtilities;
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18
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19 import org.jfree.ui.RectangleEdge;
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20
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21 /**
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22 * Custom Annotations class that is drawn only if no collisions with other
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23 * already drawn CustomAnnotations in current plot are found.
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24 */
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25 public class CollisionFreeXYTextAnnotation extends XYTextAnnotation {
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26
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27 /** Logger for this class. */
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28 private static Logger logger =
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29 Logger.getLogger(CollisionFreeXYTextAnnotation.class);
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30
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31
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32 public CollisionFreeXYTextAnnotation(String text, double x, double y) {
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33 super(text, x, y);
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34 }
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35
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36
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37 /**
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38 * Draw the Annotation only if it does not collide with other
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39 * already drawn Annotations- texts.
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40 *
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41 * @param g2 the graphics device.
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42 * @param plot the plot.
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43 * @param dataArea the data area.
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44 * @param domainAxis the domain axis.
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45 * @param rangeAxis the range axis.
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46 * @param rendererIndex the render index.
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47 * @param info state information, escpecially collects info about
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48 * already drawn shapes (and thus annotations), used
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49 * for collision detection.
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50 */
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51 @Override
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52 public void draw(
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53 java.awt.Graphics2D g2,
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54 XYPlot plot,
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55 java.awt.geom.Rectangle2D dataArea,
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56 ValueAxis domainAxis,
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57 ValueAxis rangeAxis,
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58 int rendererIndex,
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59 PlotRenderingInfo info
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60 ) {
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61 // From superclass, adjusted access only.
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62 PlotOrientation orientation = plot.getOrientation();
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63 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
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64 plot.getDomainAxisLocation(), orientation);
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65 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
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66 plot.getRangeAxisLocation(), orientation);
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67
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68 float anchorX = (float) domainAxis.valueToJava2D(
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69 this.getX(), dataArea, domainEdge);
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70 float anchorY = (float) rangeAxis.valueToJava2D(
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71 this.getY(), dataArea, rangeEdge);
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72
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73 if (orientation == PlotOrientation.HORIZONTAL) {
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74 float tempAnchor = anchorX;
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75 anchorX = anchorY;
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76 anchorY = tempAnchor;
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77 }
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78
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79 g2.setFont(getFont());
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80 Shape hotspot = TextUtilities.calculateRotatedStringBounds(
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81 getText(), g2, anchorX, anchorY, getTextAnchor(),
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82 getRotationAngle(), getRotationAnchor());
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83
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84 // Deviation from superclass: prevent collision.
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85 Rectangle2D hotspotBox = hotspot.getBounds2D();
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86
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87 if (JFreeUtil.collides(hotspot, info.getOwner().getEntityCollection(),
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88 XYAnnotationEntity.class)) {
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89 return;
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90 }
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91
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92 if (this.getBackgroundPaint() != null) {
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93 g2.setPaint(this.getBackgroundPaint());
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94 g2.fill(hotspot);
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95 }
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96 g2.setPaint(getPaint());
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97 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
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98 getTextAnchor(), getRotationAngle(), getRotationAnchor());
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99 if (this.isOutlineVisible()) {
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100 g2.setStroke(this.getOutlineStroke());
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101 g2.setPaint(this.getOutlinePaint());
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102 g2.draw(hotspot);
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103 }
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104
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105 //String toolTip = getToolTipText();
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106 //String url = getURL();
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107 String toolTip = "CollisionFreeXYTextAnnotation";
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108 String url = toolTip;
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109
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110 if (toolTip != null || url != null) {
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111 addEntity(info, hotspot, rendererIndex, toolTip, url);
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112 }
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113 else {
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114 addEntity(info, hotspot, rendererIndex,
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115 "CollisionFreeXYTextAnnotation",
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116 "CollisionFreeXYTextAnnotation");
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117 }
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118 }
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119
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120 /**
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121 * A utility method for adding an {@link CollisionFreeXYAnnotationEntity} to
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122 * a {@link PlotRenderingInfo} instance.
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123 *
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124 * @param info the plot rendering info (<code>null</code> permitted).
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125 * @param hotspot the hotspot area.
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126 * @param rendererIndex the renderer index.
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127 * @param toolTipText the tool tip text.
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128 * @param urlText the URL text.
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129 */
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130 protected void addEntity(PlotRenderingInfo info,
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131 Shape hotspot, int rendererIndex,
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132 String toolTipText, String urlText) {
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133 if (info == null) {
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134 return;
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135 }
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136 EntityCollection entities = info.getOwner().getEntityCollection();
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137 if (entities == null) {
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138 return;
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139 }
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140 CollisionFreeXYTextAnnotationEntity entity =
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141 new CollisionFreeXYTextAnnotationEntity(hotspot,
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142 rendererIndex, toolTipText, urlText);
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143 entities.add(entity);
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144 }
2157
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145 }
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146 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org