Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/jfree/StickyAxisAnnotation.java @ 3870:0c16eace7b6c

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Add robustness checks to prevent NPEs flys-artifacts/trunk@5502 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Christian Lins <christian.lins@intevation.de>
date Tue, 18 Sep 2012 10:18:30 +0000
parents d9af29a4bb85
children 6ed8ebd48d6e
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
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6 /**
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7 * Custom Annotations class that is drawn only if no collisions with other
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8 * already drawn CustomAnnotations in current plot are found. A mark on
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9 * the axis is shown in all cases, though.
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10 * Draws a given text and a line to it from either axis.
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11 */
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12 public class StickyAxisAnnotation {
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13
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14 /** Logger for this class. */
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15 private static Logger logger =
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16 Logger.getLogger(StickyAxisAnnotation.class);
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17
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18 /** Simplified view on axes. */
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19 public static enum SimpleAxis {
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20 X_AXIS, /** Usually "horizontal". */
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21 Y_AXIS, /** Usually "vertical". */
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22 Y_AXIS2
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23 }
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24
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25 /** The "symbolic" integer representing which axis to stick to. */
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26 protected int axisSymbol;
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27
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28 /** Which axis to stick to. */
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29 protected SimpleAxis stickyAxis = SimpleAxis.X_AXIS;
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30
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31 /** The 1-dimensional position of this annotation. */
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32 protected float pos;
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33
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34 /**
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35 * Optional field used when from axis a line should be drawn that
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36 * hits a curve or something similar (current scenario: duration curves).
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37 * This value is in the "other" dimension than the pos - field.
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38 */
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39 protected float hitPoint;
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40
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41 /** The text to display at axis. */
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42 String text;
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44
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45 /**
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46 * Constructor with implicit sticky x-axis.
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47 * @param text the text to display.
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48 * @param pos the position at which to draw the text and mark.
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49 */
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50 public StickyAxisAnnotation(String text, float pos) {
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51 this(text, pos, SimpleAxis.X_AXIS);
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52 }
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53
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54
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55 /**
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56 * Constructor with given explicit axis.
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57 * @param text the text to display.
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58 * @param pos the position at which to draw the text and mark.
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59 * @param stickAxis the axis at which to stick (and to which 'pos' is
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60 * relative).
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61 */
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62 public StickyAxisAnnotation(String text, float pos, SimpleAxis stickAxis
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63 ) {
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64 this(text, pos, stickAxis, 0);
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65 }
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66
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67
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68 /**
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69 * Constructor with given explicit axis and axisSymbol
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70 * @param text the text to display.
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71 * @param pos the position at which to draw the text and mark.
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72 * @param stickAxis the axis at which to stick (and to which 'pos' is
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73 * relative).
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74 */
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75 public StickyAxisAnnotation(String text, float pos, SimpleAxis stickAxis,
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76 int axisSymbol
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77 ) {
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78 setStickyAxis(stickAxis);
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79 this.text = text;
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80 this.pos = pos;
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81 this.axisSymbol = axisSymbol;
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82 this.hitPoint = Float.NaN;
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83 }
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84
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85
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86 /**
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87 * Sets the "sticky axis" (whether to draw annotations at the
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88 * X- or the Y-Axis.
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89 *
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90 * @param stickyAxis axis to stick to.
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91 */
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92 public void setStickyAxis(SimpleAxis stickyAxis) {
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93 this.stickyAxis = stickyAxis;
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94 }
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95
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96
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97 public float getPos() {
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98 return this.pos;
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99 }
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100
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101 public SimpleAxis getStickyAxis() {
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102 return this.stickyAxis;
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103 }
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104
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105 public boolean atX() {
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106 return this.getStickyAxis() == SimpleAxis.X_AXIS;
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107 }
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108
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109 /** Get text to be displayed at axis. */
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110 public String getText() {
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111 return this.text;
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112 }
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113
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114
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115 public int getAxisSymbol() {
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116 return this.axisSymbol;
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117 }
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118
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119
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120 /** Set where to hit a curve (if any). */
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121 public void setHitPoint(float pos) {
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122 this.hitPoint = pos;
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123 }
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124
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125 /** Get where to hit a curve (if any). */
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126 public float getHitPoint() {
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127 return this.hitPoint;
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128 }
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129
2766
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130 /** Set sticky axis to the X axis if it is currently Y, and vice versa. */
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131 public void flipStickyAxis() {
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132 if (this.getStickyAxis() == SimpleAxis.X_AXIS) {
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133 this.setStickyAxis(SimpleAxis.Y_AXIS);
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134 }
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135 else {
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136 this.setStickyAxis(SimpleAxis.X_AXIS);
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137 }
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138 }
1039
cf39205df113 Part of refactoring (see next commit).
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139 }
1711
f708120cb7bc Fix flys/issue363 (W-INFO/ Abflusskurve, Extremwert-Rendering).
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140 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org