Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java @ 1167:f1c9bfb07ba7

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Fix crash when StickyAxisAnnotation should be drawn without proper axis information. User-directed issues remain ( flys/issue303 ). flys-artifacts/trunk@2712 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Tue, 13 Sep 2011 06:30:10 +0000
parents 4da9f058fed6
children f708120cb7bc
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.chart.plot.PlotOrientation;
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15 import org.jfree.chart.plot.XYPlot;
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16 import org.jfree.chart.entity.XYAnnotationEntity;
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17 import org.jfree.chart.plot.PlotRenderingInfo;
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18 import org.jfree.chart.ChartRenderingInfo;
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19 import org.jfree.chart.plot.Plot;
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20
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21 import org.jfree.data.Range;
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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 import org.jfree.ui.TextAnchor;
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27
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28
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29 /**
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30 * Custom Annotations class that is drawn only if no collisions with other
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31 * already drawn CustomAnnotations in current plot are found.
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32 * Draws a given text and a line to it from either axis.
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33 */
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34 public class StickyAxisAnnotation extends XYTextAnnotation {
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35
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36 /** Logger for this class. */
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37 private static Logger logger =
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38 Logger.getLogger(StickyAxisAnnotation.class);
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39
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40 /** Simplified view on axes. */
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41 public static enum SimpleAxis {
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42 X_AXIS, /** Usually "horizontal". */
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43 Y_AXIS /** Usually "vertical". */
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44 }
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45
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46 /** Which axis to stick to. */
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47 protected SimpleAxis stickyAxis = SimpleAxis.X_AXIS;
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48
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49 /** The 1-dimensional position of this annotation. */
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50 protected float pos;
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51
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52
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53 /**
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54 * Trivial constructor.
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55 *
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56 * @param text Text to display.
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57 * @param x X-position in dataspace (typical horizontal, in km).
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58 * @param y Y-position in dataspace (typical vertical, in m).
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59 * @deprecated
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60 */
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61 public StickyAxisAnnotation(String text, float x, float y) {
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62 super(text, x, y);
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63 setStickyAxis(SimpleAxis.X_AXIS);
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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 * Constructor with implicit sticky x-axis.
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69 * @param text the text to display.
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70 * @param pos the position at which to draw the text and mark.
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71 */
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72 public StickyAxisAnnotation(String text, float pos) {
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73 this(text, pos, pos, SimpleAxis.X_AXIS);
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74 }
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75
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76
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77 /**
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78 * Constructor with given explicit axis.
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79 * @param text the text to display.
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80 * @param pos the position at which to draw the text and mark.
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81 * @param stickyAxis the axis at which to stick (and to which 'pos' is
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82 * relative).
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83 */
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84 public StickyAxisAnnotation(String text, float pos, SimpleAxis stickAxis) {
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85 super(text, pos, pos);
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86 setStickyAxis(stickAxis);
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87 this.pos = pos;
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88 }
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89
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90 /**
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91 * Legacy-Constructor.
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92 * @deprecated
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93 */
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94 public StickyAxisAnnotation(String text, float x, float y,
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95 SimpleAxis stickAxis) {
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96 super(text, x, y);
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97 setStickyAxis(stickAxis);
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98 this.pos = x;
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99 }
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100
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101
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102 /**
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103 * Sets the "sticky axis" (whether to draw annotations at the
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104 * X- or the Y-Axis.
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105 *
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106 * @param stickyAxis axis to stick to.
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107 */
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108 public void setStickyAxis(SimpleAxis stickyAxis) {
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109 this.stickyAxis = stickyAxis;
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110 if (stickyAxis == SimpleAxis.X_AXIS) {
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111 this.setRotationAngle(270f * (Math.PI / 180f));
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112 this.setRotationAnchor(TextAnchor.CENTER_LEFT);
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113 this.setTextAnchor(TextAnchor.CENTER_LEFT);
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114 } else {
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115 this.setRotationAngle(0f * (Math.PI / 180f));
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116 this.setRotationAnchor(TextAnchor.CENTER_LEFT);
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117 this.setTextAnchor(TextAnchor.CENTER_LEFT);
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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 * Draws a small line at axis where this annotation resides.
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124 *
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125 * @param g2 the graphics device.
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126 * @param dataArea the data area.
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127 * @param domainAxis the domain axis.
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128 * @param rangeAxis the range axis.
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129 * @param domainEdge the domain edge.
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130 * @param rangeEdge the range edge.
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131 * @param orientation the plot orientation.
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132 */
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133 protected void drawAxisMark(
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134 java.awt.Graphics2D g2,
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135 java.awt.geom.Rectangle2D dataArea,
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136 ValueAxis domainAxis,
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137 ValueAxis rangeAxis,
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138 RectangleEdge domainEdge,
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139 RectangleEdge rangeEdge,
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140 PlotOrientation orientation) {
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141 float j2DX1 = 0.0f;
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142 float j2DX2 = 0.0f;
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143 float j2DY1 = 0.0f;
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144 float j2DY2 = 0.0f;
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145 float x = (float) getX();
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146 float y = (float) getY();
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147 /* When dependent on X/Y-Axis and orientation, following
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148 can be used as a base:
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149 if (orientation == PlotOrientation.VERTICAL) {
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150 j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea,
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151 domainEdge);
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152 j2DY1 = (float) rangeAxis.valueToJava2D(y, dataArea,
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153 rangeEdge);
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154 j2DX2 = (float) domainAxis.valueToJava2D(x, dataArea,
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155 domainEdge);
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156 j2DY2 = (float) rangeAxis.valueToJava2D(y, dataArea,
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157 rangeEdge);
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158 }
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159 else if (orientation == PlotOrientation.HORIZONTAL) {
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160 j2DY1 = (float) domainAxis.valueToJava2D(x, dataArea,
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161 domainEdge);
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162 j2DX1 = (float) rangeAxis.valueToJava2D(y, dataArea,
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163 rangeEdge);
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164 j2DY2 = (float) domainAxis.valueToJava2D(x, dataArea,
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165 domainEdge);
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166 j2DX2 = (float) rangeAxis.valueToJava2D(y, dataArea,
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167 rangeEdge);
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168 }
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169
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170 g2.setPaint(this.paint);
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171 g2.setStroke(this.stroke);
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172 */
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173 if (this.stickyAxis == SimpleAxis.X_AXIS) {
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174 j2DY1 = (float) RectangleEdge.coordinate(dataArea, domainEdge);
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175 double rangeLow = rangeAxis.getRange().getLowerBound();
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176 // Line ends at 1.5% of full distance.
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177 j2DY2 = (float) rangeAxis.valueToJava2D(
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178 (1f - 0.015f) * rangeLow + 0.015f *
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179 rangeAxis.getRange().getUpperBound(),
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180 dataArea, rangeEdge);
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181 j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge);
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182 j2DX2 = j2DX1;
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183 } else {
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184 j2DX1 = (float) RectangleEdge.coordinate(dataArea, rangeEdge);
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185 Range domainRange = domainAxis.getRange();
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186 double rangeLow = domainRange.getLowerBound();
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187 // Line ends at 1.5% of full distance.
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188 j2DX2 = (float) domainAxis.valueToJava2D(
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189 (1f - 0.015f) * rangeLow + 0.015f *
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190 domainRange.getUpperBound(),
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191 dataArea, domainEdge);
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192 j2DY1 = (float) rangeAxis.valueToJava2D(pos, dataArea, rangeEdge);
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193 j2DY2 = j2DY1;
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194 }
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195
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196 Line2D line = new Line2D.Float(j2DX1, j2DY1, j2DX2, j2DY2);
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197
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198 // line is clipped to avoid JRE bug 6574155, for more info
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199 // see JFreeChart bug 2221495
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200 boolean visible = LineUtilities.clipLine(line, dataArea);
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201 if (visible) {
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202 g2.draw(line);
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203 }
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204 }
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205
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206
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207 /**
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208 * Draw the Annotiation if it does not collide with other already drawn
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209 * Annotations.
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210 *
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211 * @param g2 the graphics device.
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212 * @param plot the plot.
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213 * @param dataArea the data area.
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214 * @param domainAxis the domain axis.
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215 * @param rangeAxis the range axis.
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216 * @param rendererIndex the render index.
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217 * @param info state information, escpecially collects info about
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218 * already drawn shapes (and thus annotations), used
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219 * for collision detection.
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220 */
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221 @Override
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222 public void draw(
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223 java.awt.Graphics2D g2,
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224 XYPlot plot,
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225 java.awt.geom.Rectangle2D dataArea,
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226 ValueAxis domainAxis,
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227 ValueAxis rangeAxis,
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228 int rendererIndex,
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229 PlotRenderingInfo info) {
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230
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231 if (info == null)
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232 return;
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233
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234 if (domainAxis == null || rangeAxis == null
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235 || domainAxis.getRange() == null
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236 || rangeAxis.getRange() == null
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237 ) {
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238 logger.error("Annotation cannot be drawn (missing axis).");
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239 return;
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240 }
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241
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242 // Calculate the bounding box.
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243 ChartRenderingInfo chartInfo = info.getOwner();
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244
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245 PlotOrientation orientation = plot.getOrientation();
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246 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
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247 plot.getDomainAxisLocation(), orientation);
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248 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
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249 plot.getRangeAxisLocation(), orientation);
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250 float anchorX = 0f;
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251 float anchorY = 0.0f;
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252 if (this.stickyAxis == SimpleAxis.X_AXIS) {
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253 // Text starts at 1.5% of full distance.
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254 float rangeLow = (float) rangeAxis.getRange().getLowerBound();
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255 float y = rangeLow + 0.02f * ((float)
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256 rangeAxis.getRange().getUpperBound() - rangeLow);
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257 setY(y);
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258
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259 anchorX = (float) domainAxis.valueToJava2D(
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260 getX(), dataArea, domainEdge);
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261 anchorY = (float) rangeAxis.valueToJava2D(
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262 getY(), dataArea, rangeEdge);
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263 } else {
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264 float rangeLow = (float) domainAxis.getRange().getLowerBound();
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265 float x = rangeLow + 0.02f * ((float)
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266 domainAxis.getRange().getUpperBound() - rangeLow);
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267 setX(x);
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268 anchorX = (float) domainAxis.valueToJava2D(
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269 getX(), dataArea, domainEdge);
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270 anchorY = (float) rangeAxis.valueToJava2D(
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271 getY(), dataArea, rangeEdge);
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272 }
1039
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273 if (orientation == PlotOrientation.HORIZONTAL) {
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274 float tempAnchor = anchorX;
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275 anchorX = anchorY;
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276 anchorY = tempAnchor;
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277 }
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278
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279 // Always draw the small line at axis.
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280 drawAxisMark(g2, dataArea, domainAxis, rangeAxis, domainEdge,
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281 rangeEdge, orientation);
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282
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283 g2.setFont(getFont());
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284 Shape hotspot = TextUtilities.calculateRotatedStringBounds(
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285 getText(), g2, anchorX, anchorY, getTextAnchor(),
cf39205df113 Part of refactoring (see next commit).
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286 getRotationAngle(), getRotationAnchor());
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287 Rectangle2D hotspotBox = hotspot.getBounds2D();
cf39205df113 Part of refactoring (see next commit).
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288 // Check for collisions with other XYAnnotations.
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289 for (Iterator i = chartInfo.getEntityCollection().iterator();
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290 i.hasNext(); ) {
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291 Object next = i.next();
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292 // Collision with other stuff than XYAnnotations are okay.
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293 if (next instanceof XYAnnotationEntity) {
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294 XYAnnotationEntity drawnShape = (XYAnnotationEntity) next;
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295 if (drawnShape.getArea().intersects(hotspotBox)) {
cf39205df113 Part of refactoring (see next commit).
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296 // Found collision, early stop.
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297 return;
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298 }
cf39205df113 Part of refactoring (see next commit).
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299 }
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300 }
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301
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302 // Actuall drawing.
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303 if (getBackgroundPaint() != null) {
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304 g2.setPaint(getBackgroundPaint());
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305 g2.fill(hotspot);
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306 }
cf39205df113 Part of refactoring (see next commit).
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307 g2.setPaint(getPaint());
cf39205df113 Part of refactoring (see next commit).
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diff changeset
308 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
cf39205df113 Part of refactoring (see next commit).
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diff changeset
309 getTextAnchor(), getRotationAngle(), getRotationAnchor());
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310 // Draw outline.
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4da9f058fed6 Fix flys/issue280 (boundingboxes of annotation).
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diff changeset
311 if (false) {
1039
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312 g2.setStroke(getOutlineStroke());
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313 g2.setPaint(getOutlinePaint());
cf39205df113 Part of refactoring (see next commit).
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314 g2.draw(hotspot);
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315 }
cf39205df113 Part of refactoring (see next commit).
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316
cf39205df113 Part of refactoring (see next commit).
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317 // Add info that we have drawn this Annotation.
cf39205df113 Part of refactoring (see next commit).
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318 addEntity(info, hotspot, rendererIndex, getToolTipText(), getURL());
cf39205df113 Part of refactoring (see next commit).
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319 }
cf39205df113 Part of refactoring (see next commit).
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320 }
cf39205df113 Part of refactoring (see next commit).
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321
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322
http://dive4elements.wald.intevation.org