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annotate dwtx/draw2d/geometry/Dimension.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 1082a0fc2bb8
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 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.geometry.Dimension;
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14
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15 import dwtx.draw2d.geometry.Point;
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16
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17 import dwt.dwthelper.utils;
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18
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19 import dwtx.draw2d.geometry.Translatable;
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20 static import dwt.graphics.Point;
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21 static import dwt.graphics.Image;
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22 static import dwt.graphics.Rectangle;
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23 import tango.text.convert.Format;
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24
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25 /**
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26 * Stores an integer width and height. This class provides various methods for
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27 * manipulating this Dimension or creating new derived Objects.
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28 */
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29 public class Dimension
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30 : Cloneable/+, java.io.Serializable+/, Translatable
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31 {
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32
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33 /**A singleton for use in short calculations. Use to avoid newing unnecessary objects.*/
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34 public static const Dimension SINGLETON;
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35
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36 static this(){
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37 SINGLETON = new Dimension();
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38 }
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39
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40 /**The width.*/
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41 public int width;
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42 /**The height. */
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43 public int height;
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44
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45 static final long serialVersionUID = 1;
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46
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47 /**
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48 * Constructs a Dimension of zero width and height.
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49 *
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50 * @since 2.0
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51 */
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52 public this() { }
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53
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54 /**
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55 * Constructs a Dimension with the width and height of the passed Dimension.
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56 *
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57 * @param d the Dimension supplying the initial values
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58 * @since 2.0
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59 */
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60 public this(Dimension d) {
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61 width = d.width;
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62 height = d.height;
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63 }
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64
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65 /**
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66 * Constructs a Dimension where the width and height are the x and y distances of the
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67 * input point from the origin.
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68 *
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69 * @param pt the Point supplying the initial values
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70 * @since 2.0
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71 */
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72 public this(dwt.graphics.Point.Point pt) {
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73 width = pt.x;
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74 height = pt.y;
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75 }
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76
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77 /**
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78 * Constructs a Dimension with the supplied width and height values.
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79 *
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80 * @param w the width
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81 * @param h the height
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82 * @since 2.0
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83 */
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84 public this(int w, int h) {
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85 width = w;
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86 height = h;
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87 }
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88
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89 /**
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90 * Constructs a Dimension with the width and height of the Image supplied as input.
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91 *
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92 * @param image the image supplying the dimensions
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93 * @since 2.0
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94 */
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95 public this(dwt.graphics.Image.Image image) {
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96 dwt.graphics.Rectangle.Rectangle r = image.getBounds();
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97 width = r.width;
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98 height = r.height;
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99 }
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100
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101 /**
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102 * Returns <code>true</code> if the input Dimension fits into this Dimension. A Dimension
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103 * of the same size is considered to "fit".
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104 *
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105 * @param d the dimension being tested
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106 * @return <code>true</code> if this Dimension contains <i>d</i>
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107 * @since 2.0
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108 */
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109 public bool contains(Dimension d) {
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110 return width >= d.width && height >= d.height;
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111 }
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112
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113 /**
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114 * Returns <code>true</code> if this Dimension properly contains the one specified.
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115 * Proper containment is defined as containment using "<", instead of "<=".
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116 *
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117 * @param d the dimension being tested
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118 * @return <code>true</code> if this Dimension properly contains the one specified
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119 * @since 2.0
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120 */
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121 public bool containsProper(Dimension d) {
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122 return width > d.width && height > d.height;
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123 }
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124
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125 /**
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126 * Copies the width and height values of the input Dimension to this Dimension.
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127 *
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128 * @param d the dimension supplying the values
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129 * @since 2.0
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130 */
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131 public void setSize(Dimension d) {
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132 width = d.width;
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133 height = d.height;
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134 }
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135
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136 /**
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137 * Returns the area of this Dimension.
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138 *
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139 * @return the area
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140 * @since 2.0
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141 */
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142 public int getArea() {
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143 return width * height;
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144 }
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145
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146 /**
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147 * Creates and returns a copy of this Dimension.
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148 * @return a copy of this Dimension
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149 * @since 2.0
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150 */
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151 public Dimension getCopy() {
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152 return new Dimension(this);
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153 }
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154
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155 /**
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156 * Creates and returns a new Dimension representing the difference between this Dimension
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157 * and the one specified.
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158 *
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159 * @param d the dimension being compared
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160 * @return a new dimension representing the difference
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161 * @since 2.0
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162 */
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163 public Dimension getDifference(Dimension d) {
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164 return new Dimension(width - d.width, height - d.height);
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165 }
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166
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167 /**
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168 * Creates and returns a Dimension representing the sum of this Dimension and the one
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169 * specified.
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170 *
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171 * @param d the dimension providing the expansion width and height
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172 * @return a new dimension expanded by <i>d</i>
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173 * @since 2.0
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174 */
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175 public Dimension getExpanded(Dimension d) {
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176 return new Dimension(width + d.width, height + d.height);
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177 }
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178
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179 /**
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180 * Creates and returns a new Dimension representing the sum of this Dimension and the one
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181 * specified.
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182 *
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183 * @param w value by which the width of this is to be expanded
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184 * @param h value by which the height of this is to be expanded
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185 * @return a new Dimension expanded by the given values
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186 * @since 2.0
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187 */
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188 public Dimension getExpanded(int w, int h) {
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189 return new Dimension(width + w, height + h);
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190 }
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191
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192 /**
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193 * Creates and returns a new Dimension representing the intersection of this Dimension and
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194 * the one specified.
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195 *
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196 * @param d the Dimension to intersect with
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197 * @return A new Dimension representing the intersection
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198 * @since 2.0
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199 */
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200 public Dimension getIntersected(Dimension d) {
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201 return (new Dimension(this)).intersect(d);
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202 }
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203
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204 /**
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205 * Creates and returns a new Dimension with negated values.
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206 *
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207 * @return a new Dimension with negated values
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208 * @since 2.0
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209 */
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210 public Dimension getNegated() {
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211 return new Dimension(0 - width, 0 - height);
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212 }
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213
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214 /**
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215 * Returns whether the input Object is equivalent to this Dimension. <code>true</code> if
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216 * the Object is a Dimension and its width and height are equal to this Dimension's width
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217 * and height, <code>false</code> otherwise.
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218 *
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219 * @param o the Object being tested for equality
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220 * @return <code>true</code> if the given object is equal to this dimension
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221 * @since 2.0
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222 */
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223 public override int opEquals(Object o) {
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224 if (auto d = cast(Dimension)o ) {
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225 return (d.width is width && d.height is height);
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226 }
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227 return false;
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228 }
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229
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230 /**
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231 * Returns <code>true</code> if this Dimension's width and height are equal to the given
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232 * width and height.
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233 *
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234 * @param w the width
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235 * @param h the height
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236 * @return <code>true</code> if this dimension's width and height are equal to those given.
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237 * @since 2.0
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238 */
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239 public bool equals(int w, int h) {
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240 return width is w && height is h;
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241 }
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242
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243 /**
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244 * Expands the size of this Dimension by the specified amount.
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245 *
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246 * @param d the Dimension providing the expansion width and height
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247 * @return <code>this</code> for convenience
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248 * @since 2.0
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249 */
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250 public Dimension expand(Dimension d) {
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251 width += d.width;
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252 height += d.height;
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253 return this;
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254 }
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255
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256 /**
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257 * Expands the size of this Dimension by the specified amound.
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258 *
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259 * @param pt the Point supplying the dimensional values
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260 * @return <code>this</code> for convenience
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261 * @since 2.0
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262 */
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263 public Dimension expand(Point pt) {
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264 width += pt.x;
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265 height += pt.y;
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266 return this;
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267 }
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268
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269 /**
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270 * Expands the size of this Dimension by the specified width and height.
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271 *
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272 * @param w Value by which the width should be increased
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273 * @param h Value by which the height should be increased
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274 * @return <code>this</code> for convenience
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275 * @since 2.0
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276 */
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277 public Dimension expand(int w, int h) {
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278 width += w;
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279 height += h;
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280 return this;
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281 }
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282
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283 /**
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284 * Creates a new Dimension with its width and height scaled by the specified value.
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285 *
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286 * @param amount Value by which the width and height are scaled
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287 * @return a new dimension with the scale applied
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288 * @since 2.0
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289 */
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290 public Dimension getScaled(double amount) {
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291 return (new Dimension(this))
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292 .scale(amount);
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293 }
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294
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295 /**
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296 * Creates a new Dimension with its height and width swapped. Useful in orientation change
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297 * calculations.
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298 *
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299 * @return a new Dimension with its height and width swapped
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300 * @since 2.0
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301 */
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302 public Dimension getTransposed() {
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303 return (new Dimension(this))
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304 .transpose();
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305 }
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306
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307 /**
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308 * Creates a new Dimension representing the union of this Dimension with the one
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309 * specified. Union is defined as the max() of the values from each Dimension.
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310 *
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311 * @param d the Dimension to be unioned
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312 * @return a new Dimension
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313 * @since 2.0
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314 */
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315 public Dimension getUnioned(Dimension d) {
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316 return (new Dimension(this)).union_(d);
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317 }
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318
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319 /**
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320 * @see java.lang.Object#toHash()
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321 */
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322 public override hash_t toHash() {
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323 return (width * height) ^ (width + height);
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324 }
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325
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326
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327 /**
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328 * This Dimension is intersected with the one specified. Intersection is performed by
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329 * taking the min() of the values from each dimension.
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330 *
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331 * @param d the Dimension used to perform the min()
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332 * @return <code>this</code> for convenience
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333 * @since 2.0
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334 */
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335 public Dimension intersect(Dimension d) {
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336 width = Math.min(d.width, width);
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337 height = Math.min(d.height, height);
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338 return this;
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339 }
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340
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341 /**
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342 * Returns <code>true</code> if the Dimension has width or height greater than 0.
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343 *
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344 * @return <code>true</code> if this Dimension is empty
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345 * @since 2.0
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346 */
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347 public bool isEmpty() {
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348 return (width <= 0) || (height <= 0);
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349 }
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350
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351 /**
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352 * Negates the width and height of this Dimension.
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353 *
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354 * @return <code>this</code> for convenience
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355 * @since 2.0
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356 */
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357 public Dimension negate() {
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358 width = 0 - width;
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359 height = 0 - height;
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360 return this;
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361 }
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362
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363 /**
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364 * @see dwtx.draw2d.geometry.Translatable#performScale(double)
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365 */
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366 public void performScale(double factor) {
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367 scale(factor);
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368 }
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369
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370 /**
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371 * @see dwtx.draw2d.geometry.Translatable#performTranslate(int, int)
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372 */
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373 public void performTranslate(int dx, int dy) { }
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374
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375 /**
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376 * Scales the width and height of this Dimension by the amount supplied, and returns this
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377 * for convenience.
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378 *
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379 * @param amount value by which this Dimension's width and height are to be scaled
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380 * @return <code>this</code> for convenience
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381 * @since 2.0
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382 */
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383 public Dimension scale(double amount) {
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384 return scale(amount, amount);
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385 }
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386
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387 /**
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388 * Scales the width of this Dimension by <i>w</i> and scales the height of this Dimension
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389 * by <i>h</i>. Returns this for convenience.
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390 *
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391 * @param w the value by which the width is to be scaled
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392 * @param h the value by which the height is to be scaled
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393 * @return <code>this</code> for convenience
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394 * @since 2.0
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395 */
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396 public Dimension scale(double w, double h) {
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397 width = cast(int)(Math.floor(width * w));
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398 height = cast(int)(Math.floor(height * h));
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399 return this;
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400 }
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401
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402 /**
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403 * Reduces the width of this Dimension by <i>w</i>, and reduces the height of this
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404 * Dimension by <i>h</i>. Returns this for convenience.
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405 *
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406 * @param w the value by which the width is to be reduced
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407 * @param h the value by which the height is to be reduced
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408 * @return <code>this</code> for convenience
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409 * @since 2.0
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410 */
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411 public Dimension shrink(int w, int h) {
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412 return expand(-w, -h);
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413 }
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414
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415 /**
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416 * @see Object#toString()
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417 */
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418
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419 public override String toString() {
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420 return Format("Dimension({}, {})", width, height);
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421 }
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422
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423 /**
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424 * Swaps the width and height of this Dimension, and returns this for convenience. Can be
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425 * useful in orientation changes.
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426 *
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427 * @return <code>this</code> for convenience
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428 * @since 2.0
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429 */
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430 public Dimension transpose() {
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431 int temp = width;
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432 width = height;
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433 height = temp;
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434 return this;
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435 }
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436
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437 /**
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438 * Sets the width of this Dimension to the greater of this Dimension's width and
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439 * <i>d</i>.width. Likewise for this Dimension's height.
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440 *
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441 * @param d the Dimension to union with this Dimension
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442 * @return <code>this</code> for convenience
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443 * @since 2.0
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444 */
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445 public Dimension union_ (Dimension d) {
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446 width = Math.max(width, d.width);
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447 height = Math.max(height, d.height);
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448 return this;
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449 }
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450
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451 /**
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452 * Returns <code>double</code> width
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453 *
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454 * @return <code>double</code> width
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455 * @since 3.4
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456 */
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457 public double preciseWidth() {
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458 return width;
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459 }
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460
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461 /**
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462 * Returns <code>double</code> height
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diff changeset
463 *
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464 * @return <code>double</code> height
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465 * @since 3.4
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466 */
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467 public double preciseHeight() {
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468 return height;
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469 }
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470
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471 }