Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/CollisionFreeXYTextAnnotation.java @ 4713:2c99995395f5

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Documentation.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 19 Dec 2012 14:57:45 +0100
parents 6ed8ebd48d6e
children
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 java.awt.Shape;
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4 import java.awt.geom.Rectangle2D;
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5
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6 import org.jfree.chart.entity.EntityCollection;
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7 import org.jfree.chart.annotations.XYTextAnnotation;
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8 import org.jfree.chart.axis.ValueAxis;
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9 import org.jfree.chart.plot.PlotOrientation;
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10 import org.jfree.chart.plot.XYPlot;
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11 import org.jfree.chart.entity.XYAnnotationEntity;
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12 import org.jfree.chart.plot.PlotRenderingInfo;
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13 import org.jfree.chart.plot.Plot;
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14
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15 import org.jfree.text.TextUtilities;
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16
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17 import org.jfree.ui.RectangleEdge;
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18
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19 /**
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20 * Custom Annotations class that is drawn only if no collisions with other
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21 * already drawn CustomAnnotations in current plot are found.
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22 */
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23 public class CollisionFreeXYTextAnnotation extends XYTextAnnotation {
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24
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25 public CollisionFreeXYTextAnnotation(String text, double x, double y) {
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26 super(text, x, y);
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27 }
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28
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29
c4ceade9d50e Added new Annotation class that prevents collisions (to replace StickyAxisAnnotation).
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30 /**
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31 * Draw the Annotation only if it does not collide with other
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32 * already drawn Annotations- texts.
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33 *
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34 * @param g2 the graphics device.
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35 * @param plot the plot.
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36 * @param dataArea the data area.
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37 * @param domainAxis the domain axis.
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38 * @param rangeAxis the range axis.
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39 * @param rendererIndex the render index.
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40 * @param info state information, escpecially collects info about
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41 * already drawn shapes (and thus annotations), used
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42 * for collision detection.
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43 */
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44 @Override
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45 public void draw(
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46 java.awt.Graphics2D g2,
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47 XYPlot plot,
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48 java.awt.geom.Rectangle2D dataArea,
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49 ValueAxis domainAxis,
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50 ValueAxis rangeAxis,
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51 int rendererIndex,
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52 PlotRenderingInfo info
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53 ) {
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54 // From superclass, adjusted access only.
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55 PlotOrientation orientation = plot.getOrientation();
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56 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
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57 plot.getDomainAxisLocation(), orientation);
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58 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
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59 plot.getRangeAxisLocation(), orientation);
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60
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61 float anchorX = (float) domainAxis.valueToJava2D(
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62 this.getX(), dataArea, domainEdge);
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63 float anchorY = (float) rangeAxis.valueToJava2D(
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64 this.getY(), dataArea, rangeEdge);
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65
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66 if (orientation == PlotOrientation.HORIZONTAL) {
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67 float tempAnchor = anchorX;
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68 anchorX = anchorY;
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69 anchorY = tempAnchor;
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70 }
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71
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72 g2.setFont(getFont());
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73 Shape hotspot = TextUtilities.calculateRotatedStringBounds(
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74 getText(), g2, anchorX, anchorY, getTextAnchor(),
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75 getRotationAngle(), getRotationAnchor());
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76
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77 // Deviation from superclass: prevent collision.
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78 if (JFreeUtil.collides(hotspot, info.getOwner().getEntityCollection(),
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79 XYAnnotationEntity.class)) {
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80 return;
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81 }
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82
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83 if (this.getBackgroundPaint() != null) {
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84 g2.setPaint(this.getBackgroundPaint());
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85 g2.fill(hotspot);
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86 }
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87 g2.setPaint(getPaint());
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88 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
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89 getTextAnchor(), getRotationAngle(), getRotationAnchor());
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90 if (this.isOutlineVisible()) {
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91 g2.setStroke(this.getOutlineStroke());
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92 g2.setPaint(this.getOutlinePaint());
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93 g2.draw(hotspot);
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94 }
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95
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96 //String toolTip = getToolTipText();
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97 //String url = getURL();
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98 String toolTip = "CollisionFreeXYTextAnnotation";
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99 String url = toolTip;
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100
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101 if (toolTip != null || url != null) {
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102 addEntity(info, hotspot, rendererIndex, toolTip, url);
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103 }
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104 // XXX: DEAD CODE (as long as a hard value is assigned to toolTip
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105 /*
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106 else {
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107 addEntity(info, hotspot, rendererIndex,
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108 "CollisionFreeXYTextAnnotation",
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109 "CollisionFreeXYTextAnnotation");
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110 }
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111 */
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112 }
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113
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114 /**
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115 * A utility method for adding an {@link CollisionFreeXYAnnotationEntity} to
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116 * a {@link PlotRenderingInfo} instance.
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117 *
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118 * @param info the plot rendering info (<code>null</code> permitted).
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119 * @param hotspot the hotspot area.
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120 * @param rendererIndex the renderer index.
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121 * @param toolTipText the tool tip text.
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122 * @param urlText the URL text.
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123 */
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124 protected void addEntity(PlotRenderingInfo info,
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125 Shape hotspot, int rendererIndex,
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126 String toolTipText, String urlText) {
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127 if (info == null) {
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128 return;
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129 }
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130 EntityCollection entities = info.getOwner().getEntityCollection();
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131 if (entities == null) {
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132 return;
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133 }
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134 CollisionFreeXYTextAnnotationEntity entity =
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135 new CollisionFreeXYTextAnnotationEntity(hotspot,
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136 rendererIndex, toolTipText, urlText);
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137 entities.add(entity);
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138 }
2157
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139 }
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140 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org