Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java @ 1039:cf39205df113

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Part of refactoring (see next commit). flys-artifacts/trunk@2500 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 17 Aug 2011 13:04:53 +0000
parents
children 8873c43119ca
rev   line source
1039
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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
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24
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25 /**
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26 * Custom Annotations class that is drawn only if no collisions with other
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27 * already drawn CustomAnnotations in current plot are found.
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28 * Draws a given text and a line to it from either axis.
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29 */
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30 public class StickyAxisAnnotation extends XYTextAnnotation {
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31
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32 /** Logger for this class. */
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33 private static Logger logger =
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34 Logger.getLogger(StickyAxisAnnotation.class);
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35
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36 /** Simplified view on axes. */
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37 public static enum SimpleAxis {
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38 X_AXIS, /** Usually "horizontal". */
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39 Y_AXIS /** Usually "vertical". */
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40 }
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41
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42 /** Which axis to stick to. */
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43 protected SimpleAxis stickyAxis = SimpleAxis.X_AXIS;
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44
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45
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46 /**
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47 * Trivial constructor.
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48 *
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49 * @param text Text to display.
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50 * @param x X-position in dataspace (typical horizontal, in km).
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51 * @param y Y-position in dataspace (typical vertical, in m).
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52 */
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53 public StickyAxisAnnotation(String text, float x, float y) {
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54 super(text, x, y);
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55 }
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56
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57
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58 /**
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59 * Sets the "sticky axis" (whether to draw annotations at the
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60 * X- or the Y-Axis.
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61 *
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62 * @param stickyAxis axis to stick to.
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63 */
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64 public void setStickyAxis(SimpleAxis stickyAxis) {
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65 this.stickyAxis = stickyAxis;
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66 }
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67
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68
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69 /**
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70 * Draws a small line at axis where this annotation resides.
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71 *
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72 * @param g2 the graphics device.
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73 * @param dataArea the data area.
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74 * @param domainAxis the domain axis.
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75 * @param rangeAxis the range axis.
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76 * @param domainEdge the domain edge.
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77 * @param rangeEdge the range edge.
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78 * @param orientation the plot orientation.
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79 */
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80 protected void drawAxisMark(
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81 java.awt.Graphics2D g2,
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82 java.awt.geom.Rectangle2D dataArea,
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83 ValueAxis domainAxis,
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84 ValueAxis rangeAxis,
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85 RectangleEdge domainEdge,
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86 RectangleEdge rangeEdge,
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87 PlotOrientation orientation) {
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88 float j2DX1 = 0.0f;
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89 float j2DX2 = 0.0f;
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90 float j2DY1 = 0.0f;
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91 float j2DY2 = 0.0f;
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92 float x = (float) getX();
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93 float y = (float) getY();
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94 /* When dependent on X/Y-Axis and orientation, following
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95 can be used as a base:
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96 if (orientation == PlotOrientation.VERTICAL) {
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97 j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea,
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98 domainEdge);
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99 j2DY1 = (float) rangeAxis.valueToJava2D(y, dataArea,
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100 rangeEdge);
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101 j2DX2 = (float) domainAxis.valueToJava2D(x, dataArea,
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102 domainEdge);
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103 j2DY2 = (float) rangeAxis.valueToJava2D(y, dataArea,
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104 rangeEdge);
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105 }
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106 else if (orientation == PlotOrientation.HORIZONTAL) {
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107 j2DY1 = (float) domainAxis.valueToJava2D(x, dataArea,
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108 domainEdge);
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109 j2DX1 = (float) rangeAxis.valueToJava2D(y, dataArea,
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110 rangeEdge);
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111 j2DY2 = (float) domainAxis.valueToJava2D(x, dataArea,
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112 domainEdge);
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113 j2DX2 = (float) rangeAxis.valueToJava2D(y, dataArea,
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114 rangeEdge);
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115 }
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116
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117 g2.setPaint(this.paint);
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118 g2.setStroke(this.stroke);
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119 */
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120 j2DY1 = (float) RectangleEdge.coordinate(dataArea, domainEdge);
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121 j2DY2 = j2DY1 - 0.10f * (float)
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122 (rangeAxis.getRange().getUpperBound()
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123 - rangeAxis.getRange().getLowerBound());
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124 j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge);
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125 j2DX2 = j2DX1;
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126
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127 Line2D line = new Line2D.Float(j2DX1, j2DY1, j2DX2, j2DY2);
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128
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129 // line is clipped to avoid JRE bug 6574155, for more info
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130 // see JFreeChart bug 2221495
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131 boolean visible = LineUtilities.clipLine(line, dataArea);
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132 if (visible) {
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133 g2.draw(line);
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134 }
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135 }
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136
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137
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138 /**
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139 * Draw the Annotiation if it does not collide with other already drawn
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140 * Annotations.
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141 *
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142 * @param g2 the graphics device.
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143 * @param plot the plot.
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144 * @param dataArea the data area.
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145 * @param domainAxis the domain axis.
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146 * @param rangeAxis the range axis.
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147 * @param rendererIndex the render index.
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148 * @param info state information, escpecially collects info about
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149 * already drawn shapes (and thus annotations), used
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150 * for collision detection.
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151 */
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152 @Override
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153 public void draw(
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154 java.awt.Graphics2D g2,
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155 XYPlot plot,
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156 java.awt.geom.Rectangle2D dataArea,
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157 ValueAxis domainAxis,
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158 ValueAxis rangeAxis,
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159 int rendererIndex,
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160 PlotRenderingInfo info) {
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161
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162 if (info == null)
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163 return;
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164
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165 // Calculate the bounding box.
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166 ChartRenderingInfo chartInfo = info.getOwner();
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167
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168 PlotOrientation orientation = plot.getOrientation();
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169 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
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170 plot.getDomainAxisLocation(), orientation);
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171 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
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172 plot.getRangeAxisLocation(), orientation);
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173 float anchorX = (float) domainAxis.valueToJava2D(
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174 getX(), dataArea, domainEdge);
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175 float anchorY = (float) rangeAxis.valueToJava2D(
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176 getY(), dataArea, rangeEdge);
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177 if (orientation == PlotOrientation.HORIZONTAL) {
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178 float tempAnchor = anchorX;
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179 anchorX = anchorY;
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180 anchorY = tempAnchor;
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181 }
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182
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183 // Always draw the small line at axis.
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184 drawAxisMark(g2, dataArea, domainAxis, rangeAxis, domainEdge,
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185 rangeEdge, orientation);
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186
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187 g2.setFont(getFont());
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188 Shape hotspot = TextUtilities.calculateRotatedStringBounds(
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189 getText(), g2, anchorX, anchorY, getTextAnchor(),
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190 getRotationAngle(), getRotationAnchor());
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191 Rectangle2D hotspotBox = hotspot.getBounds2D();
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192 // Check for collisions with other XYAnnotations.
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193 for (Iterator i = chartInfo.getEntityCollection().iterator();
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194 i.hasNext(); ) {
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195 Object next = i.next();
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196 // Collision with other stuff than XYAnnotations are okay.
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197 if (next instanceof XYAnnotationEntity) {
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198 XYAnnotationEntity drawnShape = (XYAnnotationEntity) next;
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199 if (drawnShape.getArea().intersects(hotspotBox)) {
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200 // Found collision, early stop.
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201 return;
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202 }
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203 }
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204 }
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205
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206 // Actuall drawing.
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207 if (getBackgroundPaint() != null) {
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208 g2.setPaint(getBackgroundPaint());
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209 g2.fill(hotspot);
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210 }
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211 g2.setPaint(getPaint());
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212 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
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213 getTextAnchor(), getRotationAngle(), getRotationAnchor());
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214 // Draw outline.
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215 if (false) {
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216 g2.setStroke(getOutlineStroke());
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217 g2.setPaint(getOutlinePaint());
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218 g2.draw(hotspot);
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219 }
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220
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221 // Add info that we have drawn this Annotation.
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222 addEntity(info, hotspot, rendererIndex, getToolTipText(), getURL());
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223 }
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224 }
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225
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226
http://dive4elements.wald.intevation.org