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annotate org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/graphics/FontMetrics.d @ 36:d46287db17ed

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rakefile reorg, swt win phobosification
author Frank Benoit <benoit@tionex.de>
date Tue, 24 Mar 2009 08:48:41 +0100
parents 6dd524f61e62
children
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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 org.eclipse.swt.graphics.FontMetrics;
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14
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15
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16 import org.eclipse.swt.internal.win32.WINTYPES;
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17
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18 /**
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19 * Instances of this class provide measurement information
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20 * about fonts including ascent, descent, height, leading
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21 * space between rows, and average character width.
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22 * <code>FontMetrics</code> are obtained from <code>GC</code>s
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23 * using the <code>getFontMetrics()</code> method.
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24 *
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25 * @see GC#getFontMetrics
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26 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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27 */
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28
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29 public final class FontMetrics {
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30
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31 /**
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32 * On Windows, handle is a Win32 TEXTMETRIC struct
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33 * On Photon, handle is a Photon FontQueryInfo struct
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34 * (Warning: This field is platform dependent)
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35 * <p>
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36 * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
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37 * public API. It is marked public only so that it can be shared
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38 * within the packages provided by SWT. It is not available on all
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39 * platforms and should never be accessed from application code.
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40 * </p>
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41 */
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42 public TEXTMETRIC handle;
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43
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44 /**
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45 * Prevents instances from being created outside the package.
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46 */
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47 this() {
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48 }
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49
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50 /**
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51 * Compares the argument to the receiver, and returns true
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52 * if they represent the <em>same</em> object using a class
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53 * specific comparison.
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54 *
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55 * @param object the object to compare with this object
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56 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
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57 *
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58 * @see #hashCode
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59 */
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60 override public equals_t opEquals (Object object) {
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61 if (object is this) return true;
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62 if( auto metricObj = cast(FontMetrics)object ){
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63 auto metric = metricObj.handle;
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64 return handle.tmHeight is metric.tmHeight &&
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65 handle.tmAscent is metric.tmAscent &&
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66 handle.tmDescent is metric.tmDescent &&
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67 handle.tmInternalLeading is metric.tmInternalLeading &&
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68 handle.tmExternalLeading is metric.tmExternalLeading &&
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69 handle.tmAveCharWidth is metric.tmAveCharWidth &&
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70 handle.tmMaxCharWidth is metric.tmMaxCharWidth &&
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71 handle.tmWeight is metric.tmWeight &&
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72 handle.tmOverhang is metric.tmOverhang &&
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73 handle.tmDigitizedAspectX is metric.tmDigitizedAspectX &&
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74 handle.tmDigitizedAspectY is metric.tmDigitizedAspectY &&
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75 // handle.tmFirstChar is metric.tmFirstChar &&
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76 // handle.tmLastChar is metric.tmLastChar &&
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77 // handle.tmDefaultChar is metric.tmDefaultChar &&
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78 // handle.tmBreakChar is metric.tmBreakChar &&
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79 handle.tmItalic is metric.tmItalic &&
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80 handle.tmUnderlined is metric.tmUnderlined &&
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81 handle.tmStruckOut is metric.tmStruckOut &&
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82 handle.tmPitchAndFamily is metric.tmPitchAndFamily &&
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83 handle.tmCharSet is metric.tmCharSet;
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84 }
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85 return false;
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86 }
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87
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88 /**
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89 * Returns the ascent of the font described by the receiver. A
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90 * font's <em>ascent</em> is the distance from the baseline to the
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91 * top of actual characters, not including any of the leading area,
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92 * measured in pixels.
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93 *
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94 * @return the ascent of the font
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95 */
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96 public int getAscent() {
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97 return handle.tmAscent - handle.tmInternalLeading;
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98 }
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99
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100 /**
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101 * Returns the average character width, measured in pixels,
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102 * of the font described by the receiver.
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103 *
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104 * @return the average character width of the font
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105 */
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106 public int getAverageCharWidth() {
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107 return handle.tmAveCharWidth;
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108 }
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109
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110 /**
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111 * Returns the descent of the font described by the receiver. A
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112 * font's <em>descent</em> is the distance from the baseline to the
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113 * bottom of actual characters, not including any of the leading area,
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114 * measured in pixels.
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115 *
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116 * @return the descent of the font
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117 */
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118 public int getDescent() {
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119 return handle.tmDescent;
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120 }
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121
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122 /**
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123 * Returns the height of the font described by the receiver,
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124 * measured in pixels. A font's <em>height</em> is the sum of
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125 * its ascent, descent and leading area.
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126 *
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127 * @return the height of the font
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128 *
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129 * @see #getAscent
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130 * @see #getDescent
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131 * @see #getLeading
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132 */
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133 public int getHeight() {
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134 return handle.tmHeight;
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135 }
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136
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137 /**
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138 * Returns the leading area of the font described by the
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139 * receiver. A font's <em>leading area</em> is the space
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140 * above its ascent which may include accents or other marks.
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141 *
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142 * @return the leading space of the font
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143 */
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144 public int getLeading() {
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145 return handle.tmInternalLeading;
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146 }
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147
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148 /**
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149 * Returns an integer hash code for the receiver. Any two
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150 * objects that return <code>true</code> when passed to
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151 * <code>equals</code> must return the same value for this
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152 * method.
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153 *
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154 * @return the receiver's hash
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155 *
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156 * @see #equals
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157 */
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158 override public hash_t toHash() {
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159 return handle.tmHeight ^ handle.tmAscent ^ handle.tmDescent ^
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160 handle.tmInternalLeading ^ handle.tmExternalLeading ^
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161 handle.tmAveCharWidth ^ handle.tmMaxCharWidth ^ handle.tmWeight ^
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162 handle.tmOverhang ^ handle.tmDigitizedAspectX ^ handle.tmDigitizedAspectY ^
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163 // handle.tmFirstChar ^ handle.tmLastChar ^ handle.tmDefaultChar ^ handle.tmBreakChar ^
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164 handle.tmItalic ^ handle.tmUnderlined ^ handle.tmStruckOut ^
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165 handle.tmPitchAndFamily ^ handle.tmCharSet;
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166 }
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167
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168 /**
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169 * Invokes platform specific functionality to allocate a new font metrics.
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170 * <p>
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171 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
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172 * API for <code>FontMetrics</code>. It is marked public only so that
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173 * it can be shared within the packages provided by SWT. It is not
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174 * available on all platforms, and should never be called from
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175 * application code.
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176 * </p>
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177 *
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178 * @param handle the <code>TEXTMETRIC</code> containing information about a font
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179 * @return a new font metrics object containing the specified <code>TEXTMETRIC</code>
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180 */
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181 public static FontMetrics win32_new(TEXTMETRIC* handle) {
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182 FontMetrics fontMetrics = new FontMetrics();
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183 fontMetrics.handle = *handle;
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184 return fontMetrics;
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185 }
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186
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187 }