Mercurial > projects > dwt-win
annotate dwt/graphics/Font.d @ 213:36f5cb12e1a2
Update to SWT 3.4M7
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sat, 17 May 2008 17:34:28 +0200 |
| parents | ab60f3309436 |
| children | fd9c62a2998e |
| rev | line source |
|---|---|
| 23 | 1 /******************************************************************************* |
| 15 | 2 * Copyright (c) 2000, 2006 IBM Corporation and others. |
| 3 * All rights reserved. This program and the accompanying materials | |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 23 | 10 * Port to the D programming language: |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 15 | 12 *******************************************************************************/ |
| 13 module dwt.graphics.Font; | |
| 14 | |
| 15 | |
| 16 import dwt.DWT; | |
| 17 import dwt.DWTError; | |
| 18 import dwt.DWTException; | |
| 19 import dwt.internal.win32.OS; | |
| 20 | |
| 21 import dwt.graphics.Resource; | |
| 22 import dwt.graphics.FontData; | |
| 23 | 23 import dwt.graphics.Device; |
| 15 | 24 |
| 25 import tango.text.convert.Format; | |
|
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parents:
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|
26 import dwt.dwthelper.utils; |
| 23 | 27 //import tango.stdc.stringz; |
| 15 | 28 |
| 29 /** | |
| 30 * Instances of this class manage operating system resources that | |
| 31 * define how text looks when it is displayed. Fonts may be constructed | |
| 32 * by providing a device and either name, size and style information | |
| 33 * or a <code>FontData</code> object which encapsulates this data. | |
| 34 * <p> | |
| 23 | 35 * Application code must explicitly invoke the <code>Font.dispose()</code> |
| 15 | 36 * method to release the operating system resources managed by each instance |
| 37 * when those instances are no longer required. | |
| 38 * </p> | |
| 39 * | |
| 40 * @see FontData | |
| 41 */ | |
| 42 | |
| 43 public final class Font : Resource { | |
| 23 | 44 |
| 213 | 45 alias Resource.init_ init_; |
| 15 | 46 /** |
| 47 * the handle to the OS font resource | |
| 48 * (Warning: This field is platform dependent) | |
| 49 * <p> | |
| 50 * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT | |
| 51 * public API. It is marked public only so that it can be shared | |
| 52 * within the packages provided by DWT. It is not available on all | |
| 53 * platforms and should never be accessed from application code. | |
| 54 * </p> | |
| 55 */ | |
| 56 public HFONT handle; | |
| 23 | 57 |
| 15 | 58 /** |
| 59 * Prevents uninitialized instances from being created outside the package. | |
| 60 */ | |
| 213 | 61 this(Device device) { |
| 62 super(device); | |
| 15 | 63 } |
| 64 | |
| 23 | 65 /** |
| 15 | 66 * Constructs a new font given a device and font data |
| 67 * which describes the desired font's appearance. | |
| 68 * <p> | |
| 23 | 69 * You must dispose the font when it is no longer required. |
| 15 | 70 * </p> |
| 71 * | |
| 72 * @param device the device to create the font on | |
| 73 * @param fd the FontData that describes the desired font (must not be null) | |
| 23 | 74 * |
| 15 | 75 * @exception IllegalArgumentException <ul> |
| 76 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> | |
| 77 * <li>ERROR_NULL_ARGUMENT - if the fd argument is null</li> | |
| 78 * </ul> | |
| 79 * @exception DWTError <ul> | |
| 80 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li> | |
| 81 * </ul> | |
| 82 */ | |
| 83 public this(Device device, FontData fd) { | |
| 213 | 84 super(device); |
| 85 init_(fd); | |
| 86 init_(); | |
| 15 | 87 } |
| 88 | |
| 23 | 89 /** |
| 15 | 90 * Constructs a new font given a device and an array |
| 91 * of font data which describes the desired font's | |
| 92 * appearance. | |
| 93 * <p> | |
| 23 | 94 * You must dispose the font when it is no longer required. |
| 15 | 95 * </p> |
| 96 * | |
| 97 * @param device the device to create the font on | |
| 98 * @param fds the array of FontData that describes the desired font (must not be null) | |
| 23 | 99 * |
| 15 | 100 * @exception IllegalArgumentException <ul> |
| 101 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> | |
| 102 * <li>ERROR_NULL_ARGUMENT - if the fds argument is null</li> | |
| 103 * <li>ERROR_INVALID_ARGUMENT - if the length of fds is zero</li> | |
| 104 * <li>ERROR_NULL_ARGUMENT - if any fd in the array is null</li> | |
| 105 * </ul> | |
| 106 * @exception DWTError <ul> | |
| 107 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li> | |
| 108 * </ul> | |
| 23 | 109 * |
| 15 | 110 * @since 2.1 |
| 111 */ | |
| 112 public this(Device device, FontData[] fds) { | |
| 213 | 113 super(device); |
| 15 | 114 if (fds is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); |
| 115 if (fds.length is 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 116 for (int i=0; i<fds.length; i++) { | |
| 117 if (fds[i] is null) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 118 } | |
| 213 | 119 init_(fds[0]); |
| 120 init_(); | |
| 15 | 121 } |
| 122 | |
| 23 | 123 /** |
| 15 | 124 * Constructs a new font given a device, a font name, |
| 125 * the height of the desired font in points, and a font | |
| 126 * style. | |
| 127 * <p> | |
| 23 | 128 * You must dispose the font when it is no longer required. |
| 15 | 129 * </p> |
| 130 * | |
| 131 * @param device the device to create the font on | |
| 132 * @param name the name of the font (must not be null) | |
| 133 * @param height the font height in points | |
| 134 * @param style a bit or combination of NORMAL, BOLD, ITALIC | |
| 23 | 135 * |
| 15 | 136 * @exception IllegalArgumentException <ul> |
| 137 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> | |
| 138 * <li>ERROR_NULL_ARGUMENT - if the name argument is null</li> | |
| 139 * <li>ERROR_INVALID_ARGUMENT - if the height is negative</li> | |
| 140 * </ul> | |
| 141 * @exception DWTError <ul> | |
| 142 * <li>ERROR_NO_HANDLES - if a font could not be created from the given arguments</li> | |
| 143 * </ul> | |
| 144 */ | |
|
212
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
203
diff
changeset
|
145 public this(Device device, String name, int height, int style) { |
| 213 | 146 super(device); |
| 15 | 147 if (name is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); |
| 213 | 148 init_(new FontData (name, height, style)); |
| 149 init_(); | |
| 15 | 150 } |
| 151 | |
|
212
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
203
diff
changeset
|
152 /*public*/ this(Device device, String name, float height, int style) { |
| 213 | 153 super(device); |
| 15 | 154 if (name is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); |
| 213 | 155 init_(new FontData (name, height, style)); |
| 156 init_(); | |
| 15 | 157 } |
| 213 | 158 void destroy() { |
| 15 | 159 OS.DeleteObject(handle); |
| 160 handle = null; | |
| 161 } | |
| 162 | |
| 163 /** | |
| 164 * Compares the argument to the receiver, and returns true | |
| 165 * if they represent the <em>same</em> object using a class | |
| 166 * specific comparison. | |
| 167 * | |
| 168 * @param object the object to compare with this object | |
| 169 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise | |
| 170 * | |
| 171 * @see #hashCode | |
| 172 */ | |
| 173 public int opEquals(Object object) { | |
| 174 if (object is this) return true; | |
| 175 if ( auto font = cast(Font)object ){ | |
| 176 return device is font.device && handle is font.handle; | |
| 177 } | |
| 178 return false; | |
| 179 } | |
| 180 | |
| 181 /** | |
| 182 * Returns an array of <code>FontData</code>s representing the receiver. | |
| 23 | 183 * On Windows, only one FontData will be returned per font. On X however, |
| 184 * a <code>Font</code> object <em>may</em> be composed of multiple X | |
| 15 | 185 * fonts. To support this case, we return an array of font data objects. |
| 186 * | |
| 187 * @return an array of font data objects describing the receiver | |
| 188 * | |
| 189 * @exception DWTException <ul> | |
| 190 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 191 * </ul> | |
| 192 */ | |
| 193 public FontData[] getFontData() { | |
| 194 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
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203
8313535d74fa
Fix bug in FontMetrics, must be value type to hold values not by ref.
Frank Benoit <benoit@tionex.de>
parents:
197
diff
changeset
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195 LOGFONT* logFont = new LOGFONT(); |
| 15 | 196 OS.GetObject(handle, LOGFONT.sizeof, logFont); |
| 197 return [ cast(FontData) FontData.win32_new(logFont, device.computePoints(logFont, handle))]; | |
| 198 } | |
| 199 | |
| 200 /** | |
| 23 | 201 * Returns an integer hash code for the receiver. Any two |
| 202 * objects that return <code>true</code> when passed to | |
| 15 | 203 * <code>equals</code> must return the same value for this |
| 204 * method. | |
| 205 * | |
| 206 * @return the receiver's hash | |
| 207 * | |
| 208 * @see #equals | |
| 209 */ | |
|
48
9a64a7781bab
Added override and alias, first chunk. Thanks torhu for doing this patch.
Frank Benoit <benoit@tionex.de>
parents:
23
diff
changeset
|
210 override public hash_t toHash () { |
| 15 | 211 return cast(hash_t)handle; |
| 212 } | |
| 213 | |
| 213 | 214 void init_ (FontData fd) { |
| 15 | 215 if (fd is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); |
| 216 LOGFONT* logFont = &fd.data; | |
| 217 int lfHeight = logFont.lfHeight; | |
| 218 logFont.lfHeight = device.computePixels(fd.height); | |
| 219 handle = OS.CreateFontIndirect(logFont); | |
| 220 logFont.lfHeight = lfHeight; | |
| 221 if (handle is null) DWT.error(DWT.ERROR_NO_HANDLES); | |
| 222 } | |
| 223 | |
| 224 /** | |
| 225 * Returns <code>true</code> if the font has been disposed, | |
| 226 * and <code>false</code> otherwise. | |
| 227 * <p> | |
| 228 * This method gets the dispose state for the font. | |
| 229 * When a font has been disposed, it is an error to | |
| 230 * invoke any other method using the font. | |
| 231 * | |
| 232 * @return <code>true</code> when the font is disposed and <code>false</code> otherwise | |
| 233 */ | |
|
48
9a64a7781bab
Added override and alias, first chunk. Thanks torhu for doing this patch.
Frank Benoit <benoit@tionex.de>
parents:
23
diff
changeset
|
234 override public bool isDisposed() { |
| 15 | 235 return handle is null; |
| 236 } | |
| 237 | |
| 238 /** | |
| 239 * Returns a string containing a concise, human-readable | |
| 240 * description of the receiver. | |
| 241 * | |
| 242 * @return a string representation of the receiver | |
| 243 */ | |
|
212
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
203
diff
changeset
|
244 override public String toString () { |
| 15 | 245 if (isDisposed()) return "Font {*DISPOSED*}"; |
| 246 return Format( "Font {{{}}", handle ); | |
| 247 } | |
| 248 | |
| 23 | 249 /** |
| 15 | 250 * Invokes platform specific functionality to allocate a new font. |
| 251 * <p> | |
| 252 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public | |
| 253 * API for <code>Font</code>. It is marked public only so that it | |
| 254 * can be shared within the packages provided by DWT. It is not | |
| 255 * available on all platforms, and should never be called from | |
| 256 * application code. | |
| 257 * </p> | |
| 258 * | |
| 259 * @param device the device on which to allocate the color | |
| 260 * @param handle the handle for the font | |
| 261 * @return a new font object containing the specified device and handle | |
| 262 */ | |
| 263 public static Font win32_new(Device device, HFONT handle) { | |
| 213 | 264 Font font = new Font(device); |
| 15 | 265 font.handle = handle; |
| 266 return font; | |
| 267 } | |
| 268 | |
| 269 } |