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annotate dwtx/draw2d/PolylineDecoration.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.PolylineDecoration;
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14
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15 import dwt.dwthelper.utils;
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16
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17 import dwtx.draw2d.geometry.Point;
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18 import dwtx.draw2d.geometry.PointList;
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19 import dwtx.draw2d.geometry.Transform;
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20 import dwtx.draw2d.Polyline;
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21 import dwtx.draw2d.RotatableDecoration;
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22 import dwtx.draw2d.ColorConstants;
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23
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24 /**
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25 * A decorative Figure intended to be placed on a {@link Polyline}. It has the default
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26 * shape of right-pointing triangle.
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27 */
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28 public class PolylineDecoration
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29 : Polyline
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30 , RotatableDecoration
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31 {
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32
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33 /** A triangle template_ */
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34 public static const PointList TRIANGLE_TIP;
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35
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36 static this() {
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37 TRIANGLE_TIP = new PointList();
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38 TRIANGLE_TIP.addPoint(-1, 1);
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39 TRIANGLE_TIP.addPoint(0, 0);
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40 TRIANGLE_TIP.addPoint(-1, -1);
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41 }
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42
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43 private Point location;
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44 private PointList template_;
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45 private Transform transform;
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46
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47 /**
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48 * Constructs a PolylineDecoration. Defaults the PolylineDecoration to fill its region
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49 * with black.
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50 *
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51 * @since 2.0
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52 */
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53 public this() {
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54 location = new Point();
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55 template_ = TRIANGLE_TIP;
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56 transform = new Transform();
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57 setBackgroundColor(ColorConstants.black);
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58 setScale(7, 3);
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59 }
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60
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61 /**
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62 * @see Polyline#getPoints()
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63 */
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64 public PointList getPoints() {
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65 if (points is null) {
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66 points = new PointList();
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67 for (int i = 0; i < template_.size(); i++)
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68 points.addPoint(transform.getTransformed(template_.getPoint(i)));
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69 }
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70 return points;
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71 }
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72
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73 /**
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74 * @see IFigure#setLocation(Point)
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75 */
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76 public void setLocation(Point p) {
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77 points = null;
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78 bounds = null;
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79 location.setLocation(p);
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80 transform.setTranslation(p.x, p.y);
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81 }
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82
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83 /**
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84 * Sets the PolylineDecoration's point template_. This template_ is an outline of the
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85 * PolylineDecoration's region. (The default value is TRIANGLE_TIP which is a triangle
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86 * whose tip is pointing to the right).
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87 *
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88 * @param pl the template_
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89 * @since 2.0
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90 */
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91 public void setTemplate(PointList pl) {
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92 erase();
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93 template_ = pl;
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94 points = null;
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95 bounds = null;
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96 repaint();
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97 }
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98
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99 /**
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100 * Sets the amount of scaling to be done along X and Y axes on the PolylineDecoration's
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101 * template_.
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102 *
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103 * @param x the x scale
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104 * @param y the y scale
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105 * @since 2.0
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106 */
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107 public void setScale(double x, double y) {
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108 points = null;
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109 bounds = null;
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110 transform.setScale(x, y);
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111 }
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112
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113 /**
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114 * @see RotatableDecoration#setReferencePoint(Point)
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115 */
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116 public void setReferencePoint(Point ref_) {
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117 Point pt = Point.SINGLETON;
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118 pt.setLocation(ref_);
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119 pt.negate().translate(location);
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120 setRotation(Math.atan2(pt.y, pt.x));
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121 }
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122
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123 /**
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124 * Sets the angle by which rotation is to be done on the PolylineDecoration.
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125 *
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126 * @param angle the angle of rotation
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127 * @since 2.0
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128 */
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129 public void setRotation(double angle) {
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130 points = null;
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131 bounds = null;
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132 transform.setRotation(angle);
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133 }
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134
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135 }