Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/CollisionFreeXYTextAnnotation.java @ 4282:8b4988815974

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Added marker for Ws and Qs in Historical Discharge WQ charts. Therefore, the XYChartGenerator got two new methods addDomainMarker(Marker, boolean) and addValueMarker(Marker, boolean). The boolean parameters determine, if the marker should be visible or not. This is analogous to addAxisSeries(XYSeries, int, boolean).
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 29 Oct 2012 05:59:27 +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