Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/jfree/CollisionFreeXYTextAnnotation.java @ 6955:94cb1845c667

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(issue1452) Coalesce to zero to avoid NaN arithmetic.
author Andre Heinecke <aheinecke@intevation.de>
date Fri, 30 Aug 2013 15:45:14 +0200
parents af13ceeba52a
children 0beb34d55630
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
4897a58c8746 River artifacts: Added new copyright headers.
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.jfree;
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10
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11 import java.awt.Shape;
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12 import java.awt.geom.Rectangle2D;
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13
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14 import org.jfree.chart.entity.EntityCollection;
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15 import org.jfree.chart.annotations.XYTextAnnotation;
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16 import org.jfree.chart.axis.ValueAxis;
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17 import org.jfree.chart.plot.PlotOrientation;
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18 import org.jfree.chart.plot.XYPlot;
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19 import org.jfree.chart.entity.XYAnnotationEntity;
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20 import org.jfree.chart.plot.PlotRenderingInfo;
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21 import org.jfree.chart.plot.Plot;
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22
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23 import org.jfree.text.TextUtilities;
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24
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25 import org.jfree.ui.RectangleEdge;
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26
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27 /**
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28 * Custom Annotations class that is drawn only if no collisions with other
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29 * already drawn CustomAnnotations in current plot are found.
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30 */
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31 public class CollisionFreeXYTextAnnotation extends XYTextAnnotation {
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32
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33 public CollisionFreeXYTextAnnotation(String text, double x, double y) {
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34 super(text, x, y);
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35 }
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36
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37
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38 /**
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39 * Draw the Annotation only if it does not collide with other
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40 * already drawn Annotations- texts.
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41 *
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42 * @param g2 the graphics device.
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43 * @param plot the plot.
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44 * @param dataArea the data area.
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45 * @param domainAxis the domain axis.
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46 * @param rangeAxis the range axis.
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47 * @param rendererIndex the render index.
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48 * @param info state information, escpecially collects info about
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49 * already drawn shapes (and thus annotations), used
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50 * for collision detection.
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51 */
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52 @Override
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53 public void draw(
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54 java.awt.Graphics2D g2,
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55 XYPlot plot,
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56 java.awt.geom.Rectangle2D dataArea,
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57 ValueAxis domainAxis,
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58 ValueAxis rangeAxis,
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59 int rendererIndex,
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60 PlotRenderingInfo info
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61 ) {
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62 // From superclass, adjusted access only.
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63 PlotOrientation orientation = plot.getOrientation();
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64 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
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65 plot.getDomainAxisLocation(), orientation);
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66 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
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67 plot.getRangeAxisLocation(), orientation);
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68
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69 float anchorX = (float) domainAxis.valueToJava2D(
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70 this.getX(), dataArea, domainEdge);
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71 float anchorY = (float) rangeAxis.valueToJava2D(
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72 this.getY(), dataArea, rangeEdge);
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73
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74 if (orientation == PlotOrientation.HORIZONTAL) {
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75 float tempAnchor = anchorX;
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76 anchorX = anchorY;
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77 anchorY = tempAnchor;
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78 }
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79
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80 g2.setFont(getFont());
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81 Shape hotspot = TextUtilities.calculateRotatedStringBounds(
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82 getText(), g2, anchorX, anchorY, getTextAnchor(),
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83 getRotationAngle(), getRotationAnchor());
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84
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85 // Deviation from superclass: prevent collision.
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86 if (JFreeUtil.collides(hotspot, info.getOwner().getEntityCollection(),
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87 XYAnnotationEntity.class)) {
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88 return;
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89 }
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90
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91 if (this.getBackgroundPaint() != null) {
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92 g2.setPaint(this.getBackgroundPaint());
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93 g2.fill(hotspot);
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94 }
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95 g2.setPaint(getPaint());
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96 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
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97 getTextAnchor(), getRotationAngle(), getRotationAnchor());
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98 if (this.isOutlineVisible()) {
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99 g2.setStroke(this.getOutlineStroke());
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100 g2.setPaint(this.getOutlinePaint());
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101 g2.draw(hotspot);
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102 }
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103
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104 //String toolTip = getToolTipText();
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105 //String url = getURL();
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106 String toolTip = "CollisionFreeXYTextAnnotation";
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107 String url = toolTip;
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108
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109 if (toolTip != null || url != null) {
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110 addEntity(info, hotspot, rendererIndex, toolTip, url);
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111 }
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112 // XXX: DEAD CODE (as long as a hard value is assigned to toolTip
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113 /*
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114 else {
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115 addEntity(info, hotspot, rendererIndex,
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116 "CollisionFreeXYTextAnnotation",
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117 "CollisionFreeXYTextAnnotation");
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118 }
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119 */
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120 }
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121
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122 /**
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123 * A utility method for adding an {@link CollisionFreeXYAnnotationEntity} to
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124 * a {@link PlotRenderingInfo} instance.
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125 *
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126 * @param info the plot rendering info (<code>null</code> permitted).
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127 * @param hotspot the hotspot area.
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128 * @param rendererIndex the renderer index.
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129 * @param toolTipText the tool tip text.
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130 * @param urlText the URL text.
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131 */
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132 protected void addEntity(PlotRenderingInfo info,
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133 Shape hotspot, int rendererIndex,
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134 String toolTipText, String urlText) {
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135 if (info == null) {
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136 return;
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137 }
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138 EntityCollection entities = info.getOwner().getEntityCollection();
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139 if (entities == null) {
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140 return;
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141 }
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142 CollisionFreeXYTextAnnotationEntity entity =
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143 new CollisionFreeXYTextAnnotationEntity(hotspot,
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144 rendererIndex, toolTipText, urlText);
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145 entities.add(entity);
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146 }
2157
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147 }
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148 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org