Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java @ 1745:4ae7df2a74ed

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Fix NPE in WDiff-diagram because no ranges present in masterartifact. flys-artifacts/trunk@3039 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 19 Oct 2011 16:06:01 +0000
parents 6cdc7a77d3d4
children 27b8836abec9
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 org.w3c.dom.Document;
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8
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9 import java.awt.Shape;
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10 import java.awt.geom.Rectangle2D;
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11 import java.awt.geom.Line2D;
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12 import java.awt.Color;
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13 import java.awt.Font;
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14 import java.awt.BasicStroke;
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15
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16 import org.jfree.chart.annotations.XYTextAnnotation;
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17 import org.jfree.chart.axis.ValueAxis;
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18 import org.jfree.chart.util.LineUtilities;
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19 import org.jfree.chart.plot.PlotOrientation;
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20 import org.jfree.chart.plot.XYPlot;
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21 import org.jfree.chart.entity.XYAnnotationEntity;
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22 import org.jfree.chart.plot.PlotRenderingInfo;
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23 import org.jfree.chart.ChartRenderingInfo;
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24 import org.jfree.chart.plot.Plot;
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25
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26 import org.jfree.data.Range;
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27
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28 import org.jfree.text.TextUtilities;
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29
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30 import org.jfree.ui.RectangleEdge;
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31 import org.jfree.ui.TextAnchor;
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32
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33 import de.intevation.flys.utils.ThemeUtil;
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34
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35 /**
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36 * Custom Annotations class that is drawn only if no collisions with other
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37 * already drawn CustomAnnotations in current plot are found.
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38 * Draws a given text and a line to it from either axis.
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39 */
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40 public class StickyAxisAnnotation extends XYTextAnnotation {
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41
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42 /** Logger for this class. */
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43 private static Logger logger =
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44 Logger.getLogger(StickyAxisAnnotation.class);
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45
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46 /** Simplified view on axes. */
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47 public static enum SimpleAxis {
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48 X_AXIS, /** Usually "horizontal". */
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49 Y_AXIS /** Usually "vertical". */
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50 }
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51
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52 /** Which axis to stick to. */
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53 protected SimpleAxis stickyAxis = SimpleAxis.X_AXIS;
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54
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55 /** The 1-dimensional position of this annotation. */
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56 protected float pos;
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57
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58 /** Theme attributes. */
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59 protected Color textColor;
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60 protected Color lineColor;
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61 protected Font font;
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62 protected int lineWidth;
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63
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64
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65 /**
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66 * Trivial constructor.
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67 *
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68 * @param text Text to display.
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69 * @param x X-position in dataspace (typical horizontal, in km).
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70 * @param y Y-position in dataspace (typical vertical, in m).
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71 * @deprecated
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72 */
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73 public StickyAxisAnnotation(String text, float x, float y) {
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74 super(text, x, y);
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75 setStickyAxis(SimpleAxis.X_AXIS);
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76 }
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77
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78
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79 /**
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80 * Constructor with implicit sticky x-axis.
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81 * @param text the text to display.
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82 * @param pos the position at which to draw the text and mark.
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83 */
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84 public StickyAxisAnnotation(String text, float pos) {
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85 this(text, pos, pos, SimpleAxis.X_AXIS);
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86 }
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87
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88
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89 /**
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90 * Constructor with given explicit axis.
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91 * @param text the text to display.
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92 * @param pos the position at which to draw the text and mark.
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93 * @param stickyAxis the axis at which to stick (and to which 'pos' is
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94 * relative).
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95 */
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96 public StickyAxisAnnotation(String text, float pos, SimpleAxis stickAxis) {
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97 super(text, pos, pos);
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98 setStickyAxis(stickAxis);
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99 this.pos = pos;
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100 }
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101
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102 /**
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103 * Legacy-Constructor.
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104 * @deprecated
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105 */
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106 public StickyAxisAnnotation(String text, float x, float y,
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107 SimpleAxis stickAxis) {
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108 super(text, x, y);
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109 setStickyAxis(stickAxis);
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110 this.pos = x;
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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 * Sets the "sticky axis" (whether to draw annotations at the
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116 * X- or the Y-Axis.
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117 *
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118 * @param stickyAxis axis to stick to.
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119 */
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120 public void setStickyAxis(SimpleAxis stickyAxis) {
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121 this.stickyAxis = stickyAxis;
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122 if (stickyAxis == SimpleAxis.X_AXIS) {
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123 this.setRotationAngle(270f * (Math.PI / 180f));
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124 this.setRotationAnchor(TextAnchor.CENTER_LEFT);
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125 this.setTextAnchor(TextAnchor.CENTER_LEFT);
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126 } else {
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127 this.setRotationAngle(0f * (Math.PI / 180f));
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128 this.setRotationAnchor(TextAnchor.CENTER_LEFT);
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129 this.setTextAnchor(TextAnchor.CENTER_LEFT);
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130 }
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131 }
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132
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133
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134 /**
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135 * Draws a small line at axis where this annotation resides.
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136 *
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137 * @param g2 the graphics device.
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138 * @param dataArea the data area.
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139 * @param domainAxis the domain axis.
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140 * @param rangeAxis the range axis.
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141 * @param domainEdge the domain edge.
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142 * @param rangeEdge the range edge.
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143 * @param orientation the plot orientation.
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144 */
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145 protected void drawAxisMark(
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146 java.awt.Graphics2D g2,
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147 java.awt.geom.Rectangle2D dataArea,
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148 ValueAxis domainAxis,
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149 ValueAxis rangeAxis,
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150 RectangleEdge domainEdge,
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151 RectangleEdge rangeEdge,
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152 PlotOrientation orientation) {
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153 float j2DX1 = 0.0f;
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154 float j2DX2 = 0.0f;
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155 float j2DY1 = 0.0f;
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156 float j2DY2 = 0.0f;
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157 float x = (float) getX();
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158 float y = (float) getY();
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159 /* When dependent on X/Y-Axis and orientation, following
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160 can be used as a base:
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161 if (orientation == PlotOrientation.VERTICAL) {
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162 j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea,
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163 domainEdge);
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164 j2DY1 = (float) rangeAxis.valueToJava2D(y, dataArea,
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165 rangeEdge);
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166 j2DX2 = (float) domainAxis.valueToJava2D(x, dataArea,
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167 domainEdge);
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168 j2DY2 = (float) rangeAxis.valueToJava2D(y, dataArea,
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169 rangeEdge);
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170 }
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171 else if (orientation == PlotOrientation.HORIZONTAL) {
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172 j2DY1 = (float) domainAxis.valueToJava2D(x, dataArea,
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173 domainEdge);
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174 j2DX1 = (float) rangeAxis.valueToJava2D(y, dataArea,
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175 rangeEdge);
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176 j2DY2 = (float) domainAxis.valueToJava2D(x, dataArea,
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177 domainEdge);
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178 j2DX2 = (float) rangeAxis.valueToJava2D(y, dataArea,
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179 rangeEdge);
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180 }
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181
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182 g2.setPaint(this.paint);
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183 g2.setStroke(this.stroke);
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184 */
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185 if (this.stickyAxis == SimpleAxis.X_AXIS) {
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186 j2DY1 = (float) RectangleEdge.coordinate(dataArea, domainEdge);
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187 double rangeLow = rangeAxis.getRange().getLowerBound();
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188 // Line ends at 1.5% of full distance.
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189 j2DY2 = (float) rangeAxis.valueToJava2D(
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190 (1f - 0.015f) * rangeLow + 0.015f *
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191 rangeAxis.getRange().getUpperBound(),
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192 dataArea, rangeEdge);
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193 j2DX1 = (float) domainAxis.valueToJava2D(x, dataArea, domainEdge);
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194 j2DX2 = j2DX1;
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195 } else {
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196 j2DX1 = (float) RectangleEdge.coordinate(dataArea, rangeEdge);
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197 Range domainRange = domainAxis.getRange();
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198 double rangeLow = domainRange.getLowerBound();
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199 // Line ends at 1.5% of full distance.
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200 j2DX2 = (float) domainAxis.valueToJava2D(
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201 (1f - 0.015f) * rangeLow + 0.015f *
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202 domainRange.getUpperBound(),
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203 dataArea, domainEdge);
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204 j2DY1 = (float) rangeAxis.valueToJava2D(pos, dataArea, rangeEdge);
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205 j2DY2 = j2DY1;
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206 }
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207
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208 Line2D line = new Line2D.Float(j2DX1, j2DY1, j2DX2, j2DY2);
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209
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210 // line is clipped to avoid JRE bug 6574155, for more info
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211 // see JFreeChart bug 2221495
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212 boolean visible = LineUtilities.clipLine(line, dataArea);
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213 if (visible) {
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214 g2.draw(line);
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215 }
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216 }
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217
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218
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219 /**
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220 * Draw the Annotiation if it does not collide with other already drawn
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221 * Annotations.
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222 *
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223 * @param g2 the graphics device.
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224 * @param plot the plot.
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225 * @param dataArea the data area.
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226 * @param domainAxis the domain axis.
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227 * @param rangeAxis the range axis.
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228 * @param rendererIndex the render index.
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229 * @param info state information, escpecially collects info about
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230 * already drawn shapes (and thus annotations), used
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231 * for collision detection.
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232 */
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233 @Override
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234 public void draw(
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235 java.awt.Graphics2D g2,
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236 XYPlot plot,
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237 java.awt.geom.Rectangle2D dataArea,
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238 ValueAxis domainAxis,
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239 ValueAxis rangeAxis,
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240 int rendererIndex,
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241 PlotRenderingInfo info) {
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242
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243 if (info == null)
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244 return;
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245
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246 if (domainAxis == null || rangeAxis == null
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247 || domainAxis.getRange() == null
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248 || rangeAxis.getRange() == null
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249 ) {
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250 logger.error("Annotation cannot be drawn (missing axis).");
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251 return;
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252 }
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253
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254 // Calculate the bounding box.
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255 ChartRenderingInfo chartInfo = info.getOwner();
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256
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257 PlotOrientation orientation = plot.getOrientation();
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258 RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
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259 plot.getDomainAxisLocation(), orientation);
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260 RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(
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261 plot.getRangeAxisLocation(), orientation);
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262 float anchorX = 0f;
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263 float anchorY = 0.0f;
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264 if (this.stickyAxis == SimpleAxis.X_AXIS) {
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265 // Text starts at 1.5% of full distance.
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266 float rangeLow = (float) rangeAxis.getRange().getLowerBound();
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267 float y = rangeLow + 0.02f * ((float)
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268 rangeAxis.getRange().getUpperBound() - rangeLow);
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269 setY(y);
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270
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271 anchorX = (float) domainAxis.valueToJava2D(
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272 getX(), dataArea, domainEdge);
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273 anchorY = (float) rangeAxis.valueToJava2D(
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274 getY(), dataArea, rangeEdge);
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275 } else {
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276 float rangeLow = (float) domainAxis.getRange().getLowerBound();
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277 float x = rangeLow + 0.02f * ((float)
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278 domainAxis.getRange().getUpperBound() - rangeLow);
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279 setX(x);
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280 anchorX = (float) domainAxis.valueToJava2D(
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281 getX(), dataArea, domainEdge);
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282 anchorY = (float) rangeAxis.valueToJava2D(
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283 getY(), dataArea, rangeEdge);
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284 }
1039
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285 if (orientation == PlotOrientation.HORIZONTAL) {
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286 float tempAnchor = anchorX;
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287 anchorX = anchorY;
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288 anchorY = tempAnchor;
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289 }
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290
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291 // Always draw the small line at axis.
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292 setOutlineStroke(new BasicStroke((float) lineWidth));
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f708120cb7bc Fix flys/issue363 (W-INFO/ Abflusskurve, Extremwert-Rendering).
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293 g2.setStroke(getOutlineStroke());
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294 g2.setPaint(lineColor);
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295 drawAxisMark(g2, dataArea, domainAxis, rangeAxis, domainEdge,
cf39205df113 Part of refactoring (see next commit).
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296 rangeEdge, orientation);
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297
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298 g2.setPaint(textColor);
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299 g2.setFont(font);
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300 Shape hotspot = TextUtilities.calculateRotatedStringBounds(
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diff changeset
301 getText(), g2, anchorX, anchorY, getTextAnchor(),
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302 getRotationAngle(), getRotationAnchor());
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303 Rectangle2D hotspotBox = hotspot.getBounds2D();
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304 // Check for collisions with other XYAnnotations.
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305 for (Iterator i = chartInfo.getEntityCollection().iterator();
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diff changeset
306 i.hasNext(); ) {
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307 Object next = i.next();
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308 // Collision with other stuff than XYAnnotations are okay.
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diff changeset
309 if (next instanceof XYAnnotationEntity) {
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diff changeset
310 XYAnnotationEntity drawnShape = (XYAnnotationEntity) next;
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311 if (drawnShape.getArea().intersects(hotspotBox)) {
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312 // Found collision, early stop.
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313 return;
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314 }
cf39205df113 Part of refactoring (see next commit).
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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
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318 // Actuall drawing.
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319 if (getBackgroundPaint() != null) {
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f708120cb7bc Fix flys/issue363 (W-INFO/ Abflusskurve, Extremwert-Rendering).
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320 g2.setPaint(getBackgroundPaint());
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321 g2.fill(hotspot);
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322 }
cf39205df113 Part of refactoring (see next commit).
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323 TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY,
cf39205df113 Part of refactoring (see next commit).
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324 getTextAnchor(), getRotationAngle(), getRotationAnchor());
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325 // Draw outline.
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diff changeset
326 if (false) {
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327 g2.setStroke(getOutlineStroke());
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328 g2.setPaint(getOutlinePaint());
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329 g2.draw(hotspot);
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330 }
cf39205df113 Part of refactoring (see next commit).
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331
cf39205df113 Part of refactoring (see next commit).
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332 // Add info that we have drawn this Annotation.
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333 addEntity(info, hotspot, rendererIndex, getToolTipText(), getURL());
cf39205df113 Part of refactoring (see next commit).
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parents:
diff changeset
334 }
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335
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336
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337 public void applyTheme(Document theme) {
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338 lineWidth = ThemeUtil.parseLineWidth(theme);
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339 lineColor = ThemeUtil.parseLineColorField(theme);
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diff changeset
340 textColor = ThemeUtil.parseTextColor(theme);
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341 font = ThemeUtil.parseTextFont(theme);
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342 }
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343 }
1711
f708120cb7bc Fix flys/issue363 (W-INFO/ Abflusskurve, Extremwert-Rendering).
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diff changeset
344 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org