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annotate dwt/graphics/FontMetrics.d @ 0:380af2bdd8e5
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author | Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com> |
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date | Sat, 09 Aug 2008 17:00:02 +0200 |
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children | 1a8b3cb347e0 |
rev | line source |
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0
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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 *******************************************************************************/ |
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11 module dwt.graphics.FontMetrics; |
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12 |
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13 import dwt.dwthelper.utils; |
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14 |
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15 |
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16 /** |
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17 * Instances of this class provide measurement information |
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18 * about fonts including ascent, descent, height, leading |
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19 * space between rows, and average character width. |
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20 * <code>FontMetrics</code> are obtained from <code>GC</code>s |
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21 * using the <code>getFontMetrics()</code> method. |
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22 * |
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23 * @see GC#getFontMetrics |
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24 */ |
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25 public final class FontMetrics { |
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26 int ascent, descent, averageCharWidth, leading, height; |
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27 |
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28 FontMetrics() { |
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29 } |
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30 |
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31 public static FontMetrics cocoa_new(int ascent, int descent, int averageCharWidth, int leading, int height) { |
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32 FontMetrics fontMetrics = new FontMetrics(); |
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33 fontMetrics.ascent = ascent; |
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34 fontMetrics.descent = descent; |
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35 fontMetrics.averageCharWidth = averageCharWidth; |
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36 fontMetrics.leading = leading; |
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37 fontMetrics.height = height; |
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38 return fontMetrics; |
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39 } |
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40 |
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41 /** |
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42 * Compares the argument to the receiver, and returns true |
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43 * if they represent the <em>same</em> object using a class |
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44 * specific comparison. |
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45 * |
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46 * @param object the object to compare with this object |
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47 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise |
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48 * |
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49 * @see #hashCode |
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50 */ |
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51 public bool equals (Object object) { |
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52 if (object is this) return true; |
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53 if (!(object instanceof FontMetrics)) return false; |
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54 FontMetrics metrics = (FontMetrics)object; |
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55 return ascent is metrics.ascent && descent is metrics.descent && |
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56 averageCharWidth is metrics.averageCharWidth && leading is metrics.leading && |
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57 height is metrics.height; |
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58 } |
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59 |
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60 /** |
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61 * Returns the ascent of the font described by the receiver. A |
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62 * font's <em>ascent</em> is the distance from the baseline to the |
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63 * top of actual characters, not including any of the leading area, |
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64 * measured in pixels. |
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65 * |
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66 * @return the ascent of the font |
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67 */ |
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68 public int getAscent() { |
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69 return ascent; |
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70 } |
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71 |
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72 /** |
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73 * Returns the average character width, measured in pixels, |
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74 * of the font described by the receiver. |
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75 * |
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76 * @return the average character width of the font |
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77 */ |
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78 public int getAverageCharWidth() { |
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79 return averageCharWidth; |
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80 } |
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81 |
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82 /** |
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83 * Returns the descent of the font described by the receiver. A |
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84 * font's <em>descent</em> is the distance from the baseline to the |
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85 * bottom of actual characters, not including any of the leading area, |
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86 * measured in pixels. |
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87 * |
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88 * @return the descent of the font |
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89 */ |
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90 public int getDescent() { |
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91 return descent; |
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92 } |
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93 |
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94 /** |
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95 * Returns the height of the font described by the receiver, |
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96 * measured in pixels. A font's <em>height</em> is the sum of |
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97 * its ascent, descent and leading area. |
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98 * |
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99 * @return the height of the font |
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100 * |
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101 * @see #getAscent |
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102 * @see #getDescent |
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103 * @see #getLeading |
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104 */ |
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105 public int getHeight() { |
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106 return height; |
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107 } |
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108 |
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109 /** |
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110 * Returns the leading area of the font described by the |
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111 * receiver. A font's <em>leading area</em> is the space |
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112 * above its ascent which may include accents or other marks. |
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113 * |
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114 * @return the leading space of the font |
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115 */ |
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116 public int getLeading() { |
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117 return leading; |
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118 } |
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119 |
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120 /** |
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121 * Returns an integer hash code for the receiver. Any two |
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122 * objects that return <code>true</code> when passed to |
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123 * <code>equals</code> must return the same value for this |
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124 * method. |
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125 * |
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126 * @return the receiver's hash |
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127 * |
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128 * @see #equals |
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129 */ |
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130 public int hashCode() { |
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131 return ascent ^ descent ^ averageCharWidth ^ leading ^ height; |
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132 } |
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133 |
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134 } |