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annotate dwt/graphics/Font.d @ 33:27324bbbac70

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changed to regenerated BCD bindings
author Frank Benoit <benoit@tionex.de>
date Thu, 10 Jan 2008 02:18:07 +0100
parents 92223a4ecca7
children 8cec8f536af3
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 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.Font;
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12
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13
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14 import dwt.SWT;
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15 import dwt.graphics.Resource;
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16 import dwt.graphics.FontData;
18
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17 import dwt.graphics.Device;
17
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18 import dwt.internal.Converter;
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19 import dwt.internal.gtk.OS;
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20
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21 import tango.text.convert.Format;
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22 import tango.stdc.stringz;
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23
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24 /**
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25 * Instances of this class manage operating system resources that
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26 * define how text looks when it is displayed. Fonts may be constructed
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27 * by providing a device and either name, size and style information
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28 * or a <code>FontData</code> object which encapsulates this data.
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29 * <p>
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30 * Application code must explicitly invoke the <code>Font.dispose()</code>
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31 * method to release the operating system resources managed by each instance
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32 * when those instances are no longer required.
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33 * </p>
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34 *
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35 * @see FontData
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36 */
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37 public final class Font : Resource {
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38 /**
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39 * the handle to the OS font resource
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40 * (Warning: This field is platform dependent)
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41 * <p>
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42 * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
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43 * public API. It is marked public only so that it can be shared
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44 * within the packages provided by SWT. It is not available on all
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45 * platforms and should never be accessed from application code.
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46 * </p>
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47 */
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48 public PangoFontDescription* handle;
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49
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50 this() {
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51 }
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52
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53 /**
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54 * Constructs a new font given a device and font data
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55 * which describes the desired font's appearance.
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56 * <p>
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57 * You must dispose the font when it is no longer required.
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58 * </p>
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59 *
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60 * @param device the device to create the font on
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61 * @param fd the FontData that describes the desired font (must not be null)
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62 *
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63 * @exception IllegalArgumentException <ul>
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64 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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65 * <li>ERROR_NULL_ARGUMENT - if the fd argument is null</li>
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66 * </ul>
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67 * @exception SWTError <ul>
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68 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
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69 * </ul>
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70 */
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71 public this(Device device, FontData fd) {
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72 if (device is null) device = Device.getDevice();
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73 if (device is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
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74 if (fd is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
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75 init(device, fd.getName(), fd.getHeightF(), fd.getStyle(), fd.str);
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76 if (device.tracking) device.new_Object(this);
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77 }
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78
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79 /**
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80 * Constructs a new font given a device and an array
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81 * of font data which describes the desired font's
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82 * appearance.
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83 * <p>
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84 * You must dispose the font when it is no longer required.
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85 * </p>
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86 *
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87 * @param device the device to create the font on
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88 * @param fds the array of FontData that describes the desired font (must not be null)
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89 *
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90 * @exception IllegalArgumentException <ul>
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91 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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92 * <li>ERROR_NULL_ARGUMENT - if the fds argument is null</li>
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93 * <li>ERROR_INVALID_ARGUMENT - if the length of fds is zero</li>
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94 * <li>ERROR_NULL_ARGUMENT - if any fd in the array is null</li>
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95 * </ul>
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96 * @exception SWTError <ul>
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97 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
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98 * </ul>
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99 *
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100 * @since 2.1
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101 */
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102 public this(Device device, FontData[] fds) {
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103 if (device is null) device = Device.getDevice();
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104 if (device is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
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105 if (fds is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
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106 if (fds.length == 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
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107 for (int i=0; i<fds.length; i++) {
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108 if (fds[i] is null) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
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109 }
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110 FontData fd = fds[0];
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111 init(device,fd.getName(), fd.getHeightF(), fd.getStyle(), fd.str);
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112 if (device.tracking) device.new_Object(this);
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113 }
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114
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115 /**
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116 * Constructs a new font given a device, a font name,
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117 * the height of the desired font in points, and a font
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118 * style.
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119 * <p>
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120 * You must dispose the font when it is no longer required.
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121 * </p>
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122 *
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123 * @param device the device to create the font on
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124 * @param name the name of the font (must not be null)
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125 * @param height the font height in points
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126 * @param style a bit or combination of NORMAL, BOLD, ITALIC
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127 *
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128 * @exception IllegalArgumentException <ul>
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129 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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130 * <li>ERROR_NULL_ARGUMENT - if the name argument is null</li>
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131 * <li>ERROR_INVALID_ARGUMENT - if the height is negative</li>
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132 * </ul>
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133 * @exception SWTError <ul>
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134 * <li>ERROR_NO_HANDLES - if a font could not be created from the given arguments</li>
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135 * </ul>
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136 */
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137 public this(Device device, char[] name, int height, int style) {
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138 if (device is null) device = Device.getDevice();
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139 if (device is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
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140 init(device, name, height, style, null);
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141 if (device.tracking) device.new_Object(this);
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142 }
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143
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144 /*public*/ this(Device device, char[] name, float height, int style) {
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145 if (device is null) device = Device.getDevice();
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146 if (device is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
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147 init(device, name, height, style, null);
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148 if (device.tracking) device.new_Object(this);
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149 }
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150
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151 /**
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152 * Disposes of the operating system resources associated with
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153 * the font. Applications must dispose of all fonts which
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154 * they allocate.
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155 */
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156 public void dispose() {
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157 if (handle is null ) return;
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158 if (device.isDisposed()) return;
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159 OS.pango_font_description_free(handle);
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160 handle = null;
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161 if (device.tracking) device.dispose_Object(this);
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162 device = null;
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163 }
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164
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165 /**
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166 * Compares the argument to the receiver, and returns true
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167 * if they represent the <em>same</em> object using a class
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168 * specific comparison.
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169 *
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170 * @param object the object to compare with this object
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171 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
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172 *
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173 * @see #hashCode
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174 */
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175 public int opEquals(Object object) {
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176 if (object == this) return true;
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177 if ( auto font = cast(Font)object ){
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178 return handle is font.handle;
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179 }
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180 return false;
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181 }
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182
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183
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184 /**
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185 * Returns an array of <code>FontData</code>s representing the receiver.
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186 * On Windows, only one FontData will be returned per font. On X however,
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187 * a <code>Font</code> object <em>may</em> be composed of multiple X
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188 * fonts. To support this case, we return an array of font data objects.
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189 *
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190 * @return an array of font data objects describing the receiver
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191 *
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192 * @exception SWTException <ul>
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193 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
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194 * </ul>
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195 */
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196 public FontData[] getFontData() {
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197 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
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198
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199 auto family = OS.pango_font_description_get_family(handle);
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200 char[] name = fromUtf8z( family );
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201 float height = cast(float)OS.pango_font_description_get_size(handle) / OS.PANGO_SCALE;
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202 int pangoStyle = OS.pango_font_description_get_style(handle);
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203 int pangoWeight = OS.pango_font_description_get_weight(handle);
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204 int style = SWT.NORMAL;
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205 if (pangoStyle == OS.PANGO_STYLE_ITALIC) style |= SWT.ITALIC;
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206 if (pangoStyle == OS.PANGO_STYLE_OBLIQUE) style |= SWT.ROMAN;
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207 if (pangoWeight >= OS.PANGO_WEIGHT_BOLD) style |= SWT.BOLD;
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208 auto fontString = OS.pango_font_description_to_string (handle);
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209 auto buffer = fromUtf8z( fontString ).dup;
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210 FontData data = new FontData( buffer , height, style);
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211 OS.g_free (fontString);
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212 data.str = buffer;
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213 return [data];
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214 }
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215
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216 /**
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217 * Invokes platform specific functionality to allocate a new font.
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218 * <p>
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219 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
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220 * API for <code>Font</code>. It is marked public only so that it
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221 * can be shared within the packages provided by SWT. It is not
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222 * available on all platforms, and should never be called from
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223 * application code.
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224 * </p>
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225 *
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226 * @param device the device on which to allocate the color
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227 * @param handle the handle for the font
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228 *
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229 * @private
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230 */
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231 public static Font gtk_new(Device device, PangoFontDescription* handle) {
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232 if (device is null) device = Device.getDevice();
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233 Font font = new Font();
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234 font.handle = handle;
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235 font.device = device;
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236 return font;
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237 }
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238
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239 /**
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240 * Returns an integer hash code for the receiver. Any two
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241 * objects that return <code>true</code> when passed to
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242 * <code>equals</code> must return the same value for this
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243 * method.
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244 *
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245 * @return the receiver's hash
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246 *
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247 * @see #equals
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248 */
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249 public hash_t toHash() {
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250 return cast(hash_t)/*64*/handle;
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251 }
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252
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253 void init(Device device, char[] name, float height, int style, char[] fontString) {
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254 if (name is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
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255 if (height < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
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256 this.device = device;
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257 if (fontString !is null) {
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258 handle = OS.pango_font_description_from_string (toStringz(fontString));
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259 if (handle is null) SWT.error(SWT.ERROR_NO_HANDLES);
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260 } else {
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261 handle = OS.pango_font_description_new();
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262 if (handle is null) SWT.error(SWT.ERROR_NO_HANDLES);
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263 //byte[] buffer = Converter.wcsToMbcs(null, name, true);
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264 OS.pango_font_description_set_family(handle, toStringz(name) );
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265 OS.pango_font_description_set_size(handle, cast(int)(0.5f + height * OS.PANGO_SCALE));
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266 OS.pango_font_description_set_stretch(handle, OS.PANGO_STRETCH_NORMAL);
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267 int pangoStyle = OS.PANGO_STYLE_NORMAL;
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268 int pangoWeight = OS.PANGO_WEIGHT_NORMAL;
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269 if ((style & SWT.ITALIC) != 0) pangoStyle = OS.PANGO_STYLE_ITALIC;
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270 if ((style & SWT.ROMAN) != 0) pangoStyle = OS.PANGO_STYLE_OBLIQUE;
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271 if ((style & SWT.BOLD) != 0) pangoWeight = OS.PANGO_WEIGHT_BOLD;
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272 OS.pango_font_description_set_style(handle, pangoStyle);
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273 OS.pango_font_description_set_weight(handle, pangoWeight);
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274 }
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275 }
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276
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277 /**
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278 * Returns <code>true</code> if the font has been disposed,
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279 * and <code>false</code> otherwise.
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280 * <p>
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281 * This method gets the dispose state for the font.
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282 * When a font has been disposed, it is an error to
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283 * invoke any other method using the font.
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284 *
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285 * @return <code>true</code> when the font is disposed and <code>false</code> otherwise
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286 */
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287 public bool isDisposed() {
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288 return handle is null;
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289 }
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290
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291 /**
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292 * Returns a string containing a concise, human-readable
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293 * description of the receiver.
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294 *
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295 * @return a string representation of the receiver
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296 */
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297 public char[] toString () {
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298 if (isDisposed()) return "Font {*DISPOSED*}";
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299 return Format( "Font {{{}}", handle );
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300 }
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301
4db14dc0bc45 first graphics with gdk/gtk deps
Frank Benoit <benoit@tionex.de>
parents:
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