Mercurial > projects > dwt-win
annotate dwt/graphics/Font.d @ 334:c49e17d48b76
Fix problems at GC run at main()'s end.
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Wed, 18 Feb 2009 16:14:31 +0100 |
| parents | fd9c62a2998e |
| children |
| rev | line source |
|---|---|
| 23 | 1 /******************************************************************************* |
| 246 | 2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
| 15 | 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 import dwt.DWT; | |
| 16 import dwt.DWTError; | |
| 17 import dwt.DWTException; | |
| 18 import dwt.internal.win32.OS; | |
| 19 | |
| 20 import dwt.graphics.Resource; | |
| 21 import dwt.graphics.FontData; | |
| 23 | 22 import dwt.graphics.Device; |
| 15 | 23 |
| 24 import tango.text.convert.Format; | |
|
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25 import dwt.dwthelper.utils; |
| 23 | 26 //import tango.stdc.stringz; |
| 15 | 27 |
| 28 /** | |
| 29 * Instances of this class manage operating system resources that | |
| 30 * define how text looks when it is displayed. Fonts may be constructed | |
| 31 * by providing a device and either name, size and style information | |
| 32 * or a <code>FontData</code> object which encapsulates this data. | |
| 33 * <p> | |
| 23 | 34 * Application code must explicitly invoke the <code>Font.dispose()</code> |
| 15 | 35 * method to release the operating system resources managed by each instance |
| 36 * when those instances are no longer required. | |
| 37 * </p> | |
| 38 * | |
| 39 * @see FontData | |
| 246 | 40 * @see <a href="http://www.eclipse.org/swt/snippets/#font">Font snippets</a> |
| 41 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Examples: GraphicsExample, PaintExample</a> | |
| 42 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> | |
| 15 | 43 */ |
| 44 | |
| 45 public final class Font : Resource { | |
| 23 | 46 |
| 213 | 47 alias Resource.init_ init_; |
| 15 | 48 /** |
| 49 * the handle to the OS font resource | |
| 50 * (Warning: This field is platform dependent) | |
| 51 * <p> | |
| 52 * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT | |
| 53 * public API. It is marked public only so that it can be shared | |
| 54 * within the packages provided by DWT. It is not available on all | |
| 55 * platforms and should never be accessed from application code. | |
| 56 * </p> | |
| 57 */ | |
| 58 public HFONT handle; | |
| 23 | 59 |
| 15 | 60 /** |
| 61 * Prevents uninitialized instances from being created outside the package. | |
| 62 */ | |
| 213 | 63 this(Device device) { |
| 64 super(device); | |
| 15 | 65 } |
| 66 | |
| 23 | 67 /** |
| 15 | 68 * Constructs a new font given a device and font data |
| 69 * which describes the desired font's appearance. | |
| 70 * <p> | |
| 23 | 71 * You must dispose the font when it is no longer required. |
| 15 | 72 * </p> |
| 73 * | |
| 74 * @param device the device to create the font on | |
| 75 * @param fd the FontData that describes the desired font (must not be null) | |
| 23 | 76 * |
| 15 | 77 * @exception IllegalArgumentException <ul> |
| 78 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> | |
| 79 * <li>ERROR_NULL_ARGUMENT - if the fd argument is null</li> | |
| 80 * </ul> | |
| 81 * @exception DWTError <ul> | |
| 82 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li> | |
| 83 * </ul> | |
| 84 */ | |
| 85 public this(Device device, FontData fd) { | |
| 213 | 86 super(device); |
| 87 init_(fd); | |
| 88 init_(); | |
| 15 | 89 } |
| 90 | |
| 23 | 91 /** |
| 15 | 92 * Constructs a new font given a device and an array |
| 93 * of font data which describes the desired font's | |
| 94 * appearance. | |
| 95 * <p> | |
| 23 | 96 * You must dispose the font when it is no longer required. |
| 15 | 97 * </p> |
| 98 * | |
| 99 * @param device the device to create the font on | |
| 100 * @param fds the array of FontData that describes the desired font (must not be null) | |
| 23 | 101 * |
| 15 | 102 * @exception IllegalArgumentException <ul> |
| 103 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> | |
| 104 * <li>ERROR_NULL_ARGUMENT - if the fds argument is null</li> | |
| 105 * <li>ERROR_INVALID_ARGUMENT - if the length of fds is zero</li> | |
| 106 * <li>ERROR_NULL_ARGUMENT - if any fd in the array is null</li> | |
| 107 * </ul> | |
| 108 * @exception DWTError <ul> | |
| 109 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li> | |
| 110 * </ul> | |
| 23 | 111 * |
| 15 | 112 * @since 2.1 |
| 113 */ | |
| 114 public this(Device device, FontData[] fds) { | |
| 213 | 115 super(device); |
| 15 | 116 if (fds is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); |
| 117 if (fds.length is 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 118 for (int i=0; i<fds.length; i++) { | |
| 119 if (fds[i] is null) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 120 } | |
| 213 | 121 init_(fds[0]); |
| 122 init_(); | |
| 15 | 123 } |
| 124 | |
| 23 | 125 /** |
| 15 | 126 * Constructs a new font given a device, a font name, |
| 127 * the height of the desired font in points, and a font | |
| 128 * style. | |
| 129 * <p> | |
| 23 | 130 * You must dispose the font when it is no longer required. |
| 15 | 131 * </p> |
| 132 * | |
| 133 * @param device the device to create the font on | |
| 134 * @param name the name of the font (must not be null) | |
| 135 * @param height the font height in points | |
| 136 * @param style a bit or combination of NORMAL, BOLD, ITALIC | |
| 23 | 137 * |
| 15 | 138 * @exception IllegalArgumentException <ul> |
| 139 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> | |
| 140 * <li>ERROR_NULL_ARGUMENT - if the name argument is null</li> | |
| 141 * <li>ERROR_INVALID_ARGUMENT - if the height is negative</li> | |
| 142 * </ul> | |
| 143 * @exception DWTError <ul> | |
| 144 * <li>ERROR_NO_HANDLES - if a font could not be created from the given arguments</li> | |
| 145 * </ul> | |
| 146 */ | |
|
212
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
203
diff
changeset
|
147 public this(Device device, String name, int height, int style) { |
| 213 | 148 super(device); |
| 15 | 149 if (name is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); |
| 213 | 150 init_(new FontData (name, height, style)); |
| 151 init_(); | |
| 15 | 152 } |
| 153 | |
|
212
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
203
diff
changeset
|
154 /*public*/ this(Device device, String name, float height, int style) { |
| 213 | 155 super(device); |
| 15 | 156 if (name is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); |
| 213 | 157 init_(new FontData (name, height, style)); |
| 158 init_(); | |
| 15 | 159 } |
| 213 | 160 void destroy() { |
| 15 | 161 OS.DeleteObject(handle); |
| 162 handle = null; | |
| 163 } | |
| 164 | |
| 165 /** | |
| 166 * Compares the argument to the receiver, and returns true | |
| 167 * if they represent the <em>same</em> object using a class | |
| 168 * specific comparison. | |
| 169 * | |
| 170 * @param object the object to compare with this object | |
| 171 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise | |
| 172 * | |
| 173 * @see #hashCode | |
| 174 */ | |
| 175 public int opEquals(Object object) { | |
| 176 if (object is this) return true; | |
| 177 if ( auto font = cast(Font)object ){ | |
| 178 return device is font.device && handle is font.handle; | |
| 179 } | |
| 180 return false; | |
| 181 } | |
| 182 | |
| 183 /** | |
| 184 * Returns an array of <code>FontData</code>s representing the receiver. | |
| 23 | 185 * On Windows, only one FontData will be returned per font. On X however, |
| 186 * a <code>Font</code> object <em>may</em> be composed of multiple X | |
| 15 | 187 * fonts. To support this case, we return an array of font data objects. |
| 188 * | |
| 189 * @return an array of font data objects describing the receiver | |
| 190 * | |
| 191 * @exception DWTException <ul> | |
| 192 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 193 * </ul> | |
| 194 */ | |
| 195 public FontData[] getFontData() { | |
| 196 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
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197 LOGFONT logFont; |
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parents:
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198 OS.GetObject(handle, LOGFONT.sizeof, &logFont); |
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c49e17d48b76
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parents:
246
diff
changeset
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199 return [ cast(FontData) FontData.win32_new(&logFont, device.computePoints(&logFont, handle))]; |
| 15 | 200 } |
| 201 | |
| 202 /** | |
| 23 | 203 * Returns an integer hash code for the receiver. Any two |
| 204 * objects that return <code>true</code> when passed to | |
| 15 | 205 * <code>equals</code> must return the same value for this |
| 206 * method. | |
| 207 * | |
| 208 * @return the receiver's hash | |
| 209 * | |
| 210 * @see #equals | |
| 211 */ | |
|
48
9a64a7781bab
Added override and alias, first chunk. Thanks torhu for doing this patch.
Frank Benoit <benoit@tionex.de>
parents:
23
diff
changeset
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212 override public hash_t toHash () { |
| 15 | 213 return cast(hash_t)handle; |
| 214 } | |
| 215 | |
| 213 | 216 void init_ (FontData fd) { |
| 15 | 217 if (fd is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); |
| 218 LOGFONT* logFont = &fd.data; | |
| 219 int lfHeight = logFont.lfHeight; | |
| 220 logFont.lfHeight = device.computePixels(fd.height); | |
| 221 handle = OS.CreateFontIndirect(logFont); | |
| 222 logFont.lfHeight = lfHeight; | |
| 223 if (handle is null) DWT.error(DWT.ERROR_NO_HANDLES); | |
| 224 } | |
| 225 | |
| 226 /** | |
| 227 * Returns <code>true</code> if the font has been disposed, | |
| 228 * and <code>false</code> otherwise. | |
| 229 * <p> | |
| 230 * This method gets the dispose state for the font. | |
| 231 * When a font has been disposed, it is an error to | |
| 232 * invoke any other method using the font. | |
| 233 * | |
| 234 * @return <code>true</code> when the font is disposed and <code>false</code> otherwise | |
| 235 */ | |
|
48
9a64a7781bab
Added override and alias, first chunk. Thanks torhu for doing this patch.
Frank Benoit <benoit@tionex.de>
parents:
23
diff
changeset
|
236 override public bool isDisposed() { |
| 15 | 237 return handle is null; |
| 238 } | |
| 239 | |
| 240 /** | |
| 241 * Returns a string containing a concise, human-readable | |
| 242 * description of the receiver. | |
| 243 * | |
| 244 * @return a string representation of the receiver | |
| 245 */ | |
|
212
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
203
diff
changeset
|
246 override public String toString () { |
| 15 | 247 if (isDisposed()) return "Font {*DISPOSED*}"; |
| 248 return Format( "Font {{{}}", handle ); | |
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249 // |
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parents:
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250 // LOGFONT logFont; |
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Fix problems at GC run at main()'s end.
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parents:
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251 // OS.GetObject(handle, LOGFONT.sizeof, &logFont); |
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Fix problems at GC run at main()'s end.
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parents:
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252 // char[] name = .TCHARzToStr( logFont.lfFaceName.ptr, -1 ); |
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c49e17d48b76
Fix problems at GC run at main()'s end.
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
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253 // |
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c49e17d48b76
Fix problems at GC run at main()'s end.
Frank Benoit <benoit@tionex.de>
parents:
246
diff
changeset
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254 // return Format( "Font {{{}, {}}", handle, name ); |
| 15 | 255 } |
| 256 | |
| 23 | 257 /** |
| 15 | 258 * Invokes platform specific functionality to allocate a new font. |
| 259 * <p> | |
| 260 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public | |
| 261 * API for <code>Font</code>. It is marked public only so that it | |
| 262 * can be shared within the packages provided by DWT. It is not | |
| 263 * available on all platforms, and should never be called from | |
| 264 * application code. | |
| 265 * </p> | |
| 266 * | |
| 267 * @param device the device on which to allocate the color | |
| 268 * @param handle the handle for the font | |
| 269 * @return a new font object containing the specified device and handle | |
| 270 */ | |
| 271 public static Font win32_new(Device device, HFONT handle) { | |
| 213 | 272 Font font = new Font(device); |
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c49e17d48b76
Fix problems at GC run at main()'s end.
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parents:
246
diff
changeset
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273 font.disposeChecking = false; |
| 15 | 274 font.handle = handle; |
| 275 return font; | |
| 276 } | |
| 277 | |
| 278 } |