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annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java @ 1082:f16b66839e59

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Prepare StickyAxisAnnotation implementation to handle annotations at 'y' (vertical) axis. flys-artifacts/trunk@2579 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Thu, 25 Aug 2011 10:50:30 +0000
parents 8873c43119ca
children 07878836ee0d
rev   line source
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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 import java.awt.geom.Line2D;
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10
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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.util.LineUtilities;
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14 import org.jfree.text.TextUtilities;
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15 import org.jfree.chart.plot.PlotOrientation;
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16 import org.jfree.chart.plot.XYPlot;
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17 import org.jfree.chart.entity.XYAnnotationEntity;
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18 import org.jfree.chart.plot.PlotRenderingInfo;
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19 import org.jfree.chart.ChartRenderingInfo;
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20 import org.jfree.chart.plot.Plot;
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21
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22 import org.jfree.ui.RectangleEdge;
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23 import org.jfree.ui.TextAnchor;
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24
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25
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26 /**
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27 * Custom Annotations class that is drawn only if no collisions with other
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28 * already drawn CustomAnnotations in current plot are found.
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29 * Draws a given text and a line to it from either axis.
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30 */
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31 public class StickyAxisAnnotation extends XYTextAnnotation {
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32
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33 /** Logger for this class. */
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34 private static Logger logger =
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35 Logger.getLogger(StickyAxisAnnotation.class);
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36
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37 /** Simplified view on axes. */
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38 public static enum SimpleAxis {
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39 X_AXIS, /** Usually "horizontal". */
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40 Y_AXIS /** Usually "vertical". */
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41 }
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42
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43 /** Which axis to stick to. */
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44 protected SimpleAxis stickyAxis = SimpleAxis.X_AXIS;
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45
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46
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47 /**
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48 * Trivial constructor.
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49 *
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50 * @param text Text to display.
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51 * @param x X-position in dataspace (typical horizontal, in km).
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52 * @param y Y-position in dataspace (typical vertical, in m).
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53 */
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54 public StickyAxisAnnotation(String text, float x, float y) {
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55 super(text, x, y);
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56 setStickyAxis(SimpleAxis.X_AXIS);
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57 }
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58
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59 public StickyAxisAnnotation(String text, float x, float y,
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60 SimpleAxis stickAxis) {
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61 super(text, x, y);
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62 setStickyAxis(stickAxis);
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63 }
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64
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65
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66
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67 /**
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68 * Sets the "sticky axis" (whether to draw annotations at the
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69 * X- or the Y-Axis.
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70 *
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71 * @param stickyAxis axis to stick to.
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72 */
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73 public void setStickyAxis(SimpleAxis stickyAxis) {
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74 this.stickyAxis = stickyAxis;
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75 if (stickyAxis == SimpleAxis.X_AXIS) {
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76 this.setRotationAngle(270f * (Math.PI / 180f));
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77 this.setRotationAnchor(TextAnchor.CENTER_LEFT);
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78 this.setTextAnchor(TextAnchor.CENTER_LEFT);
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79 }
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80 }
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81
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82
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83 /**
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84 * Draws a small line at axis where this annotation resides.
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85 *
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86 * @param g2 the graphics device.
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87 * @param dataArea the data area.
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88 * @param domainAxis the domain axis.
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89 * @param rangeAxis the range axis.
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90 * @param domainEdge the domain edge.
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91 * @param rangeEdge the range edge.
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92 * @param orientation the plot orientation.
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93 */
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94 protected void drawAxisMark(
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95 java.awt.Graphics2D g2,
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96 java.awt.geom.Rectangle2D dataArea,
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97 ValueAxis domainAxis,
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98 ValueAxis rangeAxis,
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99 RectangleEdge domainEdge,
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100 RectangleEdge rangeEdge,
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101 PlotOrientation orientation) {
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102 float j2DX1 = 0.0f;
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103 float j2DX2 = 0.0f;
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104 float j2DY1 = 0.0f;
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105 float j2DY2 = 0.0f;
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106 float x = (float) getX();
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107 float y = (float) getY();
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108 /* When dependent on X/Y-Axis and orientation, following
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109 can be used as a base:
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110 if (orientation == PlotOrientation.VERTICAL) {
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111 j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea,
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112 domainEdge);
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113 j2DY1 = (float) rangeAxis.valueToJava2D(y, dataArea,
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114 rangeEdge);
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115 j2DX2 = (float) domainAxis.valueToJava2D(x, dataArea,
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116 domainEdge);
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117 j2DY2 = (float) rangeAxis.valueToJava2D(y, dataArea,
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118 rangeEdge);
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119 }
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120 else if (orientation == PlotOrientation.HORIZONTAL) {
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121 j2DY1 = (float) domainAxis.valueToJava2D(x, dataArea,
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122 domainEdge);
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123 j2DX1 = (float) rangeAxis.valueToJava2D(y, dataArea,
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124 rangeEdge);
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125 j2DY2 = (float) domainAxis.valueToJava2D(x, dataArea,
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126 domainEdge);
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127 j2DX2 = (float) rangeAxis.valueToJava2D(y, dataArea,
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128 rangeEdge);
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129 }
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130
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131 g2.setPaint(this.paint);
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132 g2.setStroke(this.stroke);
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133 */
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134 j2DY1 = (float) RectangleEdge.coordinate(dataArea, domainEdge);
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135 double rangeLow = rangeAxis.getRange().getLowerBound();
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136 // Line ends at 1.5% of full distance.
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137 j2DY2 = (float) rangeAxis.valueToJava2D(
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138 (1f - 0.015f) * rangeLow + 0.015f *
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139 rangeAxis.getRange().getUpperBound(),
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140 dataArea, rangeEdge);
1039
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141 j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge);
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142 j2DX2 = j2DX1;
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143
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144 Line2D line = new Line2D.Float(j2DX1, j2DY1, j2DX2, j2DY2);
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145
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146 // line is clipped to avoid JRE bug 6574155, for more info
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147 // see JFreeChart bug 2221495
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148 boolean visible = LineUtilities.clipLine(line, dataArea);
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149 if (visible) {
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150 g2.draw(line);
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151 }
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152 }
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153
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154
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155 /**
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156 * Draw the Annotiation if it does not collide with other already drawn
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157 * Annotations.
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158 *
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159 * @param g2 the graphics device.
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160 * @param plot the plot.
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161 * @param dataArea the data area.
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162 * @param domainAxis the domain axis.
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163 * @param rangeAxis the range axis.
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164 * @param rendererIndex the render index.
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165 * @param info state information, escpecially collects info about
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166 * already drawn shapes (and thus annotations), used
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167 * for collision detection.
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168 */
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169 @Override
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170 public void draw(
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171 java.awt.Graphics2D g2,
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172 XYPlot plot,
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173 java.awt.geom.Rectangle2D dataArea,
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174 ValueAxis domainAxis,
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175 ValueAxis rangeAxis,
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176 int rendererIndex,
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177 PlotRenderingInfo info) {
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178
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179 if (info == null)
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180 return;
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181
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182 // Calculate the bounding box.
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183 ChartRenderingInfo chartInfo = info.getOwner();
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184
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185 PlotOrientation orientation = plot.getOrientation();
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186 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
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187 plot.getDomainAxisLocation(), orientation);
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188 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
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189 plot.getRangeAxisLocation(), orientation);
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190 float anchorX = (float) domainAxis.valueToJava2D(
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191 getX(), dataArea, domainEdge);
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192 float anchorY = (float) rangeAxis.valueToJava2D(
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193 getY(), dataArea, rangeEdge);
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194 if (orientation == PlotOrientation.HORIZONTAL) {
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195 float tempAnchor = anchorX;
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196 anchorX = anchorY;
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197 anchorY = tempAnchor;
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198 }
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199
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200 // Always draw the small line at axis.
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201 drawAxisMark(g2, dataArea, domainAxis, rangeAxis, domainEdge,
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202 rangeEdge, orientation);
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203
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204 g2.setFont(getFont());
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205 Shape hotspot = TextUtilities.calculateRotatedStringBounds(
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206 getText(), g2, anchorX, anchorY, getTextAnchor(),
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207 getRotationAngle(), getRotationAnchor());
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208 Rectangle2D hotspotBox = hotspot.getBounds2D();
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209 // Check for collisions with other XYAnnotations.
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210 for (Iterator i = chartInfo.getEntityCollection().iterator();
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211 i.hasNext(); ) {
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212 Object next = i.next();
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213 // Collision with other stuff than XYAnnotations are okay.
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214 if (next instanceof XYAnnotationEntity) {
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215 XYAnnotationEntity drawnShape = (XYAnnotationEntity) next;
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216 if (drawnShape.getArea().intersects(hotspotBox)) {
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217 // Found collision, early stop.
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218 return;
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219 }
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220 }
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221 }
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222
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223 // Actuall drawing.
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224 if (getBackgroundPaint() != null) {
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225 g2.setPaint(getBackgroundPaint());
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226 g2.fill(hotspot);
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227 }
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228 g2.setPaint(getPaint());
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229 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
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230 getTextAnchor(), getRotationAngle(), getRotationAnchor());
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231 // Draw outline.
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232 if (false) {
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233 g2.setStroke(getOutlineStroke());
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234 g2.setPaint(getOutlinePaint());
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235 g2.draw(hotspot);
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236 }
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237
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238 // Add info that we have drawn this Annotation.
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239 addEntity(info, hotspot, rendererIndex, getToolTipText(), getURL());
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240 }
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241 }
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242
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243
http://dive4elements.wald.intevation.org