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annotate dwtx/draw2d/graph/Obstacle.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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1 /*******************************************************************************
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2 * Copyright (c) 2004, 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.graph.Obstacle;
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14
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15 import dwt.dwthelper.utils;
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16 import tango.text.convert.Format;
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17
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18 import dwtx.draw2d.PositionConstants;
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19 import dwtx.draw2d.geometry.Point;
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20 import dwtx.draw2d.geometry.Rectangle;
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21 import dwtx.draw2d.graph.Vertex;
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22 import dwtx.draw2d.graph.ShortestPathRouter;
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23
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24 /**
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25 * An obstacle representation for the ShortestPathRouting. This is a subclass of Rectangle.
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26 *
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27 * This class is for internal use only.
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28 * @author Whitney Sorenson
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29 * @since 3.0
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30 */
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31 class Obstacle
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32 : Rectangle
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33 {
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34
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35 bool exclude;
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36 Vertex topLeft, topRight, bottomLeft, bottomRight, center;
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37 private ShortestPathRouter router;
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38
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39 /**
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40 * Creates a new obstacle from the given rectangle bounds.
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41 * @param rect the bounds
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42 */
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43 this(Rectangle rect, ShortestPathRouter router) {
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44 init(rect);
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45 this.router = router;
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46 }
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47
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48 /**
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49 * Returns <code>true</code> if the given point is contained but not on the boundary of
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50 * this obstacle.
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51 * @param p a point
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52 * @return <code>true</code> if properly contained
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53 */
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54 public bool containsProper(Point p) {
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55 return p.x > this.x
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56 && p.x < this.x + this.width - 1
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57 && p.y > this.y
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58 && p.y < this.y + this.height - 1;
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59 }
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60
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61 public int getSpacing() {
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62 return router.getSpacing();
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63 }
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64
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65 private void growVertex(Vertex vertex) {
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66 if (vertex.totalCount > 0)
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67 vertex.grow();
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68 }
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69
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70 /**
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71 * Grows all vertices on this obstacle.
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72 */
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73 void growVertices() {
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74 growVertex(topLeft);
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75 growVertex(topRight);
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76 growVertex(bottomLeft);
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77 growVertex(bottomRight);
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78 }
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79
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80 /**
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81 * Initializes this obstacle to the values of the given rectangle
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82 *
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83 * @param rect bounds of this obstacle
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84 */
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85 void init(Rectangle rect) {
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86 this.x = rect.x;
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87 this.y = rect.y;
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88 this.width = rect.width;
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89 this.height = rect.height;
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90
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91 exclude = false;
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92
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93 topLeft = new Vertex(x, y, this);
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94 topLeft.positionOnObstacle = PositionConstants.NORTH_WEST;
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95 topRight = new Vertex(x + width - 1, y, this);
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96 topRight.positionOnObstacle = PositionConstants.NORTH_EAST;
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97 bottomLeft = new Vertex(x, y + height - 1, this);
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98 bottomLeft.positionOnObstacle = PositionConstants.SOUTH_WEST;
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99 bottomRight = new Vertex(x + width - 1, y + height - 1, this);
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100 bottomRight.positionOnObstacle = PositionConstants.SOUTH_EAST;
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101 center = new Vertex(getCenter(), this);
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102 }
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103
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104 /**
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105 * Requests a full reset on all four vertices of this obstacle.
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106 */
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107 void reset() {
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108 topLeft.fullReset();
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109 bottomLeft.fullReset();
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110 bottomRight.fullReset();
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111 topRight.fullReset();
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112 }
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113
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114 private void shrinkVertex(Vertex vertex) {
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115 if (vertex.totalCount > 0)
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116 vertex.shrink();
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117 }
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118
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119 /**
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120 * Shrinks all four vertices of this obstacle.
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121 */
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122 void shrinkVertices() {
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123 shrinkVertex(topLeft);
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124 shrinkVertex(topRight);
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125 shrinkVertex(bottomLeft);
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126 shrinkVertex(bottomRight);
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127 }
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128
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129 /**
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130 * @see dwtx.draw2d.geometry.Rectangle#toString()
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131 */
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132 public String toString() {
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133 return Format("Obstacle({}, {}, {}, {})", x, y, //$NON-NLS-3$//$NON-NLS-2$//$NON-NLS-1$
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134 width, height );//$NON-NLS-2$//$NON-NLS-1$
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135 }
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136
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137 }