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annotate dwtx/draw2d/PolygonDecoration.d @ 98:95307ad235d9

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Added Draw2d code, still work in progress
author Frank Benoit <benoit@tionex.de>
date Sun, 03 Aug 2008 00:52:14 +0200
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children 2d6540440fe6
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.draw2d.PolygonDecoration;
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14
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15 import dwt.dwthelper.utils;
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16
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17
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18
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19 import dwt.graphics.Color;
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20 import dwtx.draw2d.geometry.Point;
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21 import dwtx.draw2d.geometry.PointList;
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22 import dwtx.draw2d.geometry.Transform;
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23 import dwtx.draw2d.RotatableDecoration;
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24 import dwtx.draw2d.Polygon;
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25
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26 /**
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27 * A rotatable, polygon shaped decoration most commonly used for decorating the ends of
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28 * {@link dwtx.draw2d.Polyline polylines}.
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29 */
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30 public class PolygonDecoration
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31 : Polygon
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32 , RotatableDecoration
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33 {
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34
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35 /** Template for a triangle that points to the right when the rotation angle is 0 */
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36 public static const PointList TRIANGLE_TIP;
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37 /** Template for a triangle that points to the left when the rotation angle is 0 */
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38 public static const PointList INVERTED_TRIANGLE_TIP;
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39
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40 static this() {
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41 TRIANGLE_TIP = new PointList();
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42 INVERTED_TRIANGLE_TIP = new PointList();
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43 TRIANGLE_TIP.addPoint(0, 0);
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44 TRIANGLE_TIP.addPoint(-1, 1);
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45 TRIANGLE_TIP.addPoint(-1, -1);
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46
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47 INVERTED_TRIANGLE_TIP.addPoint(0, 1);
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48 INVERTED_TRIANGLE_TIP.addPoint(0, -1);
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49 INVERTED_TRIANGLE_TIP.addPoint(-1, 0);
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50 }
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51
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52 private Point location;
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53 private PointList template_;
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54 private Transform transform;
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55
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56 /**
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57 * Constructs a PolygonDecoration. Defaults the PolygonDecoration to fill its region
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58 * with black.
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59 *
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60 * @since 2.0
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61 */
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62 public this() {
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63 location = new Point();
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64 template_ = TRIANGLE_TIP;
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65 transform = new Transform();
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66 setFill(true);
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67 setScale(7, 3);
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68 }
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69
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70 /**
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71 * @see dwtx.draw2d.IFigure#getBackgroundColor()
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72 */
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73 public Color getLocalBackgroundColor() {
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74 if (super.getLocalBackgroundColor() is null)
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75 return getForegroundColor();
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76 return super.getLocalBackgroundColor();
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77 }
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78
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79 /**
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80 * Returns the points in the PolygonDecoration as a PointList.
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81 *
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82 * @return the points in this PolygonDecoration
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83 * @since 2.0
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84 */
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85 public PointList getPoints() {
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86 if (points is null) {
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87 points = new PointList();
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88 for (int i = 0; i < template_.size(); i++)
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89 points.addPoint(transform.getTransformed(template_.getPoint(i)));
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90 }
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91 return points;
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92 }
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93
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94 /**
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95 * Sets the location of this PolygonDecoration.
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96 * @param p the new location
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97 */
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98 public void setLocation(Point p) {
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99 points = null;
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100 bounds = null;
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101 location.setLocation(p);
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102 transform.setTranslation(p.x, p.y);
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103 }
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104
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105 /**
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106 * Sets the PolygonDecorations point template_ to the passed PointList. This template_ is an
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107 * outline of the PolygonDecoration's region. (The default value is TRIANGLE_TIP which is
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108 * a triangle whose tip is pointing to the right).
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109 *
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110 * @param pl the PointList outline to use as the PolygonDecoration's region
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111 * @since 2.0
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112 */
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113 public void setTemplate(PointList pl) {
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114 erase();
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115 template_ = pl;
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116 points = null;
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117 bounds = null;
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118 repaint();
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119 }
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120
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121 /**
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122 * Sets the amount of scaling to be done along X and Y axes on the PolygonDecoration's
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123 * template_.
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124 *
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125 * @param x X scaling
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126 * @param y Y scaling
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127 * @since 2.0
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128 */
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129 public void setScale(double x, double y) {
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130 points = null;
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131 bounds = null;
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132 transform.setScale(x, y);
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133 }
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134
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135 /**
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136 * Sets the rotation of this decoration so that the decoration points toward the
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137 * given reference point.
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138 * @param ref the reference point
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139 */
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140 public void setReferencePoint(Point ref_) {
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141 Point pt = Point.SINGLETON;
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142 pt.setLocation(ref_);
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143 pt.negate().translate(location);
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144 setRotation(Math.atan2(pt.y, pt.x));
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145 }
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146
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147 /**
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148 * Sets the angle by which rotation is to be done on the PolygonDecoration.
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149 *
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150 * @param angle Angle of rotation
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151 * @since 2.0
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152 */
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153 public void setRotation(double angle) {
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154 points = null;
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155 bounds = null;
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156 transform.setRotation(angle);
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157 }
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158
95307ad235d9 Added Draw2d code, still work in progress
Frank Benoit <benoit@tionex.de>
parents:
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