J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | package java.awt; |
| 26 | |
| 27 | import java.io.ObjectStreamException; |
| 28 | |
| 29 | /** |
| 30 | * A class to encapsulate symbolic colors representing the color of |
| 31 | * native GUI objects on a system. For systems which support the dynamic |
| 32 | * update of the system colors (when the user changes the colors) |
| 33 | * the actual RGB values of these symbolic colors will also change |
| 34 | * dynamically. In order to compare the "current" RGB value of a |
| 35 | * <code>SystemColor</code> object with a non-symbolic Color object, |
| 36 | * <code>getRGB</code> should be used rather than <code>equals</code>. |
| 37 | * <p> |
| 38 | * Note that the way in which these system colors are applied to GUI objects |
| 39 | * may vary slightly from platform to platform since GUI objects may be |
| 40 | * rendered differently on each platform. |
| 41 | * <p> |
| 42 | * System color values may also be available through the <code>getDesktopProperty</code> |
| 43 | * method on <code>java.awt.Toolkit</code>. |
| 44 | * |
| 45 | * @see Toolkit#getDesktopProperty |
| 46 | * |
| 47 | * @author Carl Quinn |
| 48 | * @author Amy Fowler |
| 49 | */ |
| 50 | public final class SystemColor extends Color implements java.io.Serializable { |
| 51 | |
| 52 | /** |
| 53 | * The array index for the |
| 54 | * {@link #desktop} system color. |
| 55 | * @see SystemColor#desktop |
| 56 | */ |
| 57 | public final static int DESKTOP = 0; |
| 58 | |
| 59 | /** |
| 60 | * The array index for the |
| 61 | * {@link #activeCaption} system color. |
| 62 | * @see SystemColor#activeCaption |
| 63 | */ |
| 64 | public final static int ACTIVE_CAPTION = 1; |
| 65 | |
| 66 | /** |
| 67 | * The array index for the |
| 68 | * {@link #activeCaptionText} system color. |
| 69 | * @see SystemColor#activeCaptionText |
| 70 | */ |
| 71 | public final static int ACTIVE_CAPTION_TEXT = 2; |
| 72 | |
| 73 | /** |
| 74 | * The array index for the |
| 75 | * {@link #activeCaptionBorder} system color. |
| 76 | * @see SystemColor#activeCaptionBorder |
| 77 | */ |
| 78 | public final static int ACTIVE_CAPTION_BORDER = 3; |
| 79 | |
| 80 | /** |
| 81 | * The array index for the |
| 82 | * {@link #inactiveCaption} system color. |
| 83 | * @see SystemColor#inactiveCaption |
| 84 | */ |
| 85 | public final static int INACTIVE_CAPTION = 4; |
| 86 | |
| 87 | /** |
| 88 | * The array index for the |
| 89 | * {@link #inactiveCaptionText} system color. |
| 90 | * @see SystemColor#inactiveCaptionText |
| 91 | */ |
| 92 | public final static int INACTIVE_CAPTION_TEXT = 5; |
| 93 | |
| 94 | /** |
| 95 | * The array index for the |
| 96 | * {@link #inactiveCaptionBorder} system color. |
| 97 | * @see SystemColor#inactiveCaptionBorder |
| 98 | */ |
| 99 | public final static int INACTIVE_CAPTION_BORDER = 6; |
| 100 | |
| 101 | /** |
| 102 | * The array index for the |
| 103 | * {@link #window} system color. |
| 104 | * @see SystemColor#window |
| 105 | */ |
| 106 | public final static int WINDOW = 7; |
| 107 | |
| 108 | /** |
| 109 | * The array index for the |
| 110 | * {@link #windowBorder} system color. |
| 111 | * @see SystemColor#windowBorder |
| 112 | */ |
| 113 | public final static int WINDOW_BORDER = 8; |
| 114 | |
| 115 | /** |
| 116 | * The array index for the |
| 117 | * {@link #windowText} system color. |
| 118 | * @see SystemColor#windowText |
| 119 | */ |
| 120 | public final static int WINDOW_TEXT = 9; |
| 121 | |
| 122 | /** |
| 123 | * The array index for the |
| 124 | * {@link #menu} system color. |
| 125 | * @see SystemColor#menu |
| 126 | */ |
| 127 | public final static int MENU = 10; |
| 128 | |
| 129 | /** |
| 130 | * The array index for the |
| 131 | * {@link #menuText} system color. |
| 132 | * @see SystemColor#menuText |
| 133 | */ |
| 134 | public final static int MENU_TEXT = 11; |
| 135 | |
| 136 | /** |
| 137 | * The array index for the |
| 138 | * {@link #text} system color. |
| 139 | * @see SystemColor#text |
| 140 | */ |
| 141 | public final static int TEXT = 12; |
| 142 | |
| 143 | /** |
| 144 | * The array index for the |
| 145 | * {@link #textText} system color. |
| 146 | * @see SystemColor#textText |
| 147 | */ |
| 148 | public final static int TEXT_TEXT = 13; |
| 149 | |
| 150 | /** |
| 151 | * The array index for the |
| 152 | * {@link #textHighlight} system color. |
| 153 | * @see SystemColor#textHighlight |
| 154 | */ |
| 155 | public final static int TEXT_HIGHLIGHT = 14; |
| 156 | |
| 157 | /** |
| 158 | * The array index for the |
| 159 | * {@link #textHighlightText} system color. |
| 160 | * @see SystemColor#textHighlightText |
| 161 | */ |
| 162 | public final static int TEXT_HIGHLIGHT_TEXT = 15; |
| 163 | |
| 164 | /** |
| 165 | * The array index for the |
| 166 | * {@link #textInactiveText} system color. |
| 167 | * @see SystemColor#textInactiveText |
| 168 | */ |
| 169 | public final static int TEXT_INACTIVE_TEXT = 16; |
| 170 | |
| 171 | /** |
| 172 | * The array index for the |
| 173 | * {@link #control} system color. |
| 174 | * @see SystemColor#control |
| 175 | */ |
| 176 | public final static int CONTROL = 17; |
| 177 | |
| 178 | /** |
| 179 | * The array index for the |
| 180 | * {@link #controlText} system color. |
| 181 | * @see SystemColor#controlText |
| 182 | */ |
| 183 | public final static int CONTROL_TEXT = 18; |
| 184 | |
| 185 | /** |
| 186 | * The array index for the |
| 187 | * {@link #controlHighlight} system color. |
| 188 | * @see SystemColor#controlHighlight |
| 189 | */ |
| 190 | public final static int CONTROL_HIGHLIGHT = 19; |
| 191 | |
| 192 | /** |
| 193 | * The array index for the |
| 194 | * {@link #controlLtHighlight} system color. |
| 195 | * @see SystemColor#controlLtHighlight |
| 196 | */ |
| 197 | public final static int CONTROL_LT_HIGHLIGHT = 20; |
| 198 | |
| 199 | /** |
| 200 | * The array index for the |
| 201 | * {@link #controlShadow} system color. |
| 202 | * @see SystemColor#controlShadow |
| 203 | */ |
| 204 | public final static int CONTROL_SHADOW = 21; |
| 205 | |
| 206 | /** |
| 207 | * The array index for the |
| 208 | * {@link #controlDkShadow} system color. |
| 209 | * @see SystemColor#controlDkShadow |
| 210 | */ |
| 211 | public final static int CONTROL_DK_SHADOW = 22; |
| 212 | |
| 213 | /** |
| 214 | * The array index for the |
| 215 | * {@link #scrollbar} system color. |
| 216 | * @see SystemColor#scrollbar |
| 217 | */ |
| 218 | public final static int SCROLLBAR = 23; |
| 219 | |
| 220 | /** |
| 221 | * The array index for the |
| 222 | * {@link #info} system color. |
| 223 | * @see SystemColor#info |
| 224 | */ |
| 225 | public final static int INFO = 24; |
| 226 | |
| 227 | /** |
| 228 | * The array index for the |
| 229 | * {@link #infoText} system color. |
| 230 | * @see SystemColor#infoText |
| 231 | */ |
| 232 | public final static int INFO_TEXT = 25; |
| 233 | |
| 234 | /** |
| 235 | * The number of system colors in the array. |
| 236 | */ |
| 237 | public final static int NUM_COLORS = 26; |
| 238 | |
| 239 | /******************************************************************************************/ |
| 240 | |
| 241 | /* |
| 242 | * System colors with default initial values, overwritten by toolkit if |
| 243 | * system values differ and are available. |
| 244 | * Should put array initialization above first field that is using |
| 245 | * SystemColor constructor to initialize. |
| 246 | */ |
| 247 | private static int[] systemColors = { |
| 248 | 0xFF005C5C, // desktop = new Color(0,92,92); |
| 249 | 0xFF000080, // activeCaption = new Color(0,0,128); |
| 250 | 0xFFFFFFFF, // activeCaptionText = Color.white; |
| 251 | 0xFFC0C0C0, // activeCaptionBorder = Color.lightGray; |
| 252 | 0xFF808080, // inactiveCaption = Color.gray; |
| 253 | 0xFFC0C0C0, // inactiveCaptionText = Color.lightGray; |
| 254 | 0xFFC0C0C0, // inactiveCaptionBorder = Color.lightGray; |
| 255 | 0xFFFFFFFF, // window = Color.white; |
| 256 | 0xFF000000, // windowBorder = Color.black; |
| 257 | 0xFF000000, // windowText = Color.black; |
| 258 | 0xFFC0C0C0, // menu = Color.lightGray; |
| 259 | 0xFF000000, // menuText = Color.black; |
| 260 | 0xFFC0C0C0, // text = Color.lightGray; |
| 261 | 0xFF000000, // textText = Color.black; |
| 262 | 0xFF000080, // textHighlight = new Color(0,0,128); |
| 263 | 0xFFFFFFFF, // textHighlightText = Color.white; |
| 264 | 0xFF808080, // textInactiveText = Color.gray; |
| 265 | 0xFFC0C0C0, // control = Color.lightGray; |
| 266 | 0xFF000000, // controlText = Color.black; |
| 267 | 0xFFFFFFFF, // controlHighlight = Color.white; |
| 268 | 0xFFE0E0E0, // controlLtHighlight = new Color(224,224,224); |
| 269 | 0xFF808080, // controlShadow = Color.gray; |
| 270 | 0xFF000000, // controlDkShadow = Color.black; |
| 271 | 0xFFE0E0E0, // scrollbar = new Color(224,224,224); |
| 272 | 0xFFE0E000, // info = new Color(224,224,0); |
| 273 | 0xFF000000, // infoText = Color.black; |
| 274 | }; |
| 275 | |
| 276 | /** |
| 277 | * The color rendered for the background of the desktop. |
| 278 | */ |
| 279 | public final static SystemColor desktop = new SystemColor((byte)DESKTOP); |
| 280 | |
| 281 | /** |
| 282 | * The color rendered for the window-title background of the currently active window. |
| 283 | */ |
| 284 | public final static SystemColor activeCaption = new SystemColor((byte)ACTIVE_CAPTION); |
| 285 | |
| 286 | /** |
| 287 | * The color rendered for the window-title text of the currently active window. |
| 288 | */ |
| 289 | public final static SystemColor activeCaptionText = new SystemColor((byte)ACTIVE_CAPTION_TEXT); |
| 290 | |
| 291 | /** |
| 292 | * The color rendered for the border around the currently active window. |
| 293 | */ |
| 294 | public final static SystemColor activeCaptionBorder = new SystemColor((byte)ACTIVE_CAPTION_BORDER); |
| 295 | |
| 296 | /** |
| 297 | * The color rendered for the window-title background of inactive windows. |
| 298 | */ |
| 299 | public final static SystemColor inactiveCaption = new SystemColor((byte)INACTIVE_CAPTION); |
| 300 | |
| 301 | /** |
| 302 | * The color rendered for the window-title text of inactive windows. |
| 303 | */ |
| 304 | public final static SystemColor inactiveCaptionText = new SystemColor((byte)INACTIVE_CAPTION_TEXT); |
| 305 | |
| 306 | /** |
| 307 | * The color rendered for the border around inactive windows. |
| 308 | */ |
| 309 | public final static SystemColor inactiveCaptionBorder = new SystemColor((byte)INACTIVE_CAPTION_BORDER); |
| 310 | |
| 311 | /** |
| 312 | * The color rendered for the background of interior regions inside windows. |
| 313 | */ |
| 314 | public final static SystemColor window = new SystemColor((byte)WINDOW); |
| 315 | |
| 316 | /** |
| 317 | * The color rendered for the border around interior regions inside windows. |
| 318 | */ |
| 319 | public final static SystemColor windowBorder = new SystemColor((byte)WINDOW_BORDER); |
| 320 | |
| 321 | /** |
| 322 | * The color rendered for text of interior regions inside windows. |
| 323 | */ |
| 324 | public final static SystemColor windowText = new SystemColor((byte)WINDOW_TEXT); |
| 325 | |
| 326 | /** |
| 327 | * The color rendered for the background of menus. |
| 328 | */ |
| 329 | public final static SystemColor menu = new SystemColor((byte)MENU); |
| 330 | |
| 331 | /** |
| 332 | * The color rendered for the text of menus. |
| 333 | */ |
| 334 | public final static SystemColor menuText = new SystemColor((byte)MENU_TEXT); |
| 335 | |
| 336 | /** |
| 337 | * The color rendered for the background of text control objects, such as |
| 338 | * textfields and comboboxes. |
| 339 | */ |
| 340 | public final static SystemColor text = new SystemColor((byte)TEXT); |
| 341 | |
| 342 | /** |
| 343 | * The color rendered for the text of text control objects, such as textfields |
| 344 | * and comboboxes. |
| 345 | */ |
| 346 | public final static SystemColor textText = new SystemColor((byte)TEXT_TEXT); |
| 347 | |
| 348 | /** |
| 349 | * The color rendered for the background of selected items, such as in menus, |
| 350 | * comboboxes, and text. |
| 351 | */ |
| 352 | public final static SystemColor textHighlight = new SystemColor((byte)TEXT_HIGHLIGHT); |
| 353 | |
| 354 | /** |
| 355 | * The color rendered for the text of selected items, such as in menus, comboboxes, |
| 356 | * and text. |
| 357 | */ |
| 358 | public final static SystemColor textHighlightText = new SystemColor((byte)TEXT_HIGHLIGHT_TEXT); |
| 359 | |
| 360 | /** |
| 361 | * The color rendered for the text of inactive items, such as in menus. |
| 362 | */ |
| 363 | public final static SystemColor textInactiveText = new SystemColor((byte)TEXT_INACTIVE_TEXT); |
| 364 | |
| 365 | /** |
| 366 | * The color rendered for the background of control panels and control objects, |
| 367 | * such as pushbuttons. |
| 368 | */ |
| 369 | public final static SystemColor control = new SystemColor((byte)CONTROL); |
| 370 | |
| 371 | /** |
| 372 | * The color rendered for the text of control panels and control objects, |
| 373 | * such as pushbuttons. |
| 374 | */ |
| 375 | public final static SystemColor controlText = new SystemColor((byte)CONTROL_TEXT); |
| 376 | |
| 377 | /** |
| 378 | * The color rendered for light areas of 3D control objects, such as pushbuttons. |
| 379 | * This color is typically derived from the <code>control</code> background color |
| 380 | * to provide a 3D effect. |
| 381 | */ |
| 382 | public final static SystemColor controlHighlight = new SystemColor((byte)CONTROL_HIGHLIGHT); |
| 383 | |
| 384 | /** |
| 385 | * The color rendered for highlight areas of 3D control objects, such as pushbuttons. |
| 386 | * This color is typically derived from the <code>control</code> background color |
| 387 | * to provide a 3D effect. |
| 388 | */ |
| 389 | public final static SystemColor controlLtHighlight = new SystemColor((byte)CONTROL_LT_HIGHLIGHT); |
| 390 | |
| 391 | /** |
| 392 | * The color rendered for shadow areas of 3D control objects, such as pushbuttons. |
| 393 | * This color is typically derived from the <code>control</code> background color |
| 394 | * to provide a 3D effect. |
| 395 | */ |
| 396 | public final static SystemColor controlShadow = new SystemColor((byte)CONTROL_SHADOW); |
| 397 | |
| 398 | /** |
| 399 | * The color rendered for dark shadow areas on 3D control objects, such as pushbuttons. |
| 400 | * This color is typically derived from the <code>control</code> background color |
| 401 | * to provide a 3D effect. |
| 402 | */ |
| 403 | public final static SystemColor controlDkShadow = new SystemColor((byte)CONTROL_DK_SHADOW); |
| 404 | |
| 405 | /** |
| 406 | * The color rendered for the background of scrollbars. |
| 407 | */ |
| 408 | public final static SystemColor scrollbar = new SystemColor((byte)SCROLLBAR); |
| 409 | |
| 410 | /** |
| 411 | * The color rendered for the background of tooltips or spot help. |
| 412 | */ |
| 413 | public final static SystemColor info = new SystemColor((byte)INFO); |
| 414 | |
| 415 | /** |
| 416 | * The color rendered for the text of tooltips or spot help. |
| 417 | */ |
| 418 | public final static SystemColor infoText = new SystemColor((byte)INFO_TEXT); |
| 419 | |
| 420 | /* |
| 421 | * JDK 1.1 serialVersionUID. |
| 422 | */ |
| 423 | private static final long serialVersionUID = 4503142729533789064L; |
| 424 | |
| 425 | /* |
| 426 | * An index into either array of SystemColor objects or values. |
| 427 | */ |
| 428 | private transient int index; |
| 429 | |
| 430 | private static SystemColor systemColorObjects [] = { |
| 431 | SystemColor.desktop, |
| 432 | SystemColor.activeCaption, |
| 433 | SystemColor.activeCaptionText, |
| 434 | SystemColor.activeCaptionBorder, |
| 435 | SystemColor.inactiveCaption, |
| 436 | SystemColor.inactiveCaptionText, |
| 437 | SystemColor.inactiveCaptionBorder, |
| 438 | SystemColor.window, |
| 439 | SystemColor.windowBorder, |
| 440 | SystemColor.windowText, |
| 441 | SystemColor.menu, |
| 442 | SystemColor.menuText, |
| 443 | SystemColor.text, |
| 444 | SystemColor.textText, |
| 445 | SystemColor.textHighlight, |
| 446 | SystemColor.textHighlightText, |
| 447 | SystemColor.textInactiveText, |
| 448 | SystemColor.control, |
| 449 | SystemColor.controlText, |
| 450 | SystemColor.controlHighlight, |
| 451 | SystemColor.controlLtHighlight, |
| 452 | SystemColor.controlShadow, |
| 453 | SystemColor.controlDkShadow, |
| 454 | SystemColor.scrollbar, |
| 455 | SystemColor.info, |
| 456 | SystemColor.infoText |
| 457 | }; |
| 458 | |
| 459 | static { |
| 460 | updateSystemColors(); |
| 461 | } |
| 462 | |
| 463 | /** |
| 464 | * Called from <init> & toolkit to update the above systemColors cache. |
| 465 | */ |
| 466 | private static void updateSystemColors() { |
| 467 | if (!GraphicsEnvironment.isHeadless()) { |
| 468 | Toolkit.getDefaultToolkit().loadSystemColors(systemColors); |
| 469 | } |
| 470 | for (int i = 0; i < systemColors.length; i++) { |
| 471 | systemColorObjects[i].value = systemColors[i]; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | /** |
| 476 | * Creates a symbolic color that represents an indexed entry into system |
| 477 | * color cache. Used by above static system colors. |
| 478 | */ |
| 479 | private SystemColor(byte index) { |
| 480 | super(systemColors[index]); |
| 481 | this.index = index; |
| 482 | } |
| 483 | |
| 484 | /** |
| 485 | * Returns a string representation of this <code>Color</code>'s values. |
| 486 | * This method is intended to be used only for debugging purposes, |
| 487 | * and the content and format of the returned string may vary between |
| 488 | * implementations. |
| 489 | * The returned string may be empty but may not be <code>null</code>. |
| 490 | * |
| 491 | * @return a string representation of this <code>Color</code> |
| 492 | */ |
| 493 | public String toString() { |
| 494 | return getClass().getName() + "[i=" + (index) + "]"; |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * The design of the {@code SystemColor} class assumes that |
| 499 | * the {@code SystemColor} object instances stored in the |
| 500 | * static final fields above are the only instances that can |
| 501 | * be used by developers. |
| 502 | * This method helps maintain those limits on instantiation |
| 503 | * by using the index stored in the value field of the |
| 504 | * serialized form of the object to replace the serialized |
| 505 | * object with the equivalent static object constant field |
| 506 | * of {@code SystemColor}. |
| 507 | * See the {@link #writeReplace} method for more information |
| 508 | * on the serialized form of these objects. |
| 509 | * @return one of the {@code SystemColor} static object |
| 510 | * fields that refers to the same system color. |
| 511 | */ |
| 512 | private Object readResolve() { |
| 513 | // The instances of SystemColor are tightly controlled and |
| 514 | // only the canonical instances appearing above as static |
| 515 | // constants are allowed. The serial form of SystemColor |
| 516 | // objects stores the color index as the value. Here we |
| 517 | // map that index back into the canonical instance. |
| 518 | return systemColorObjects[value]; |
| 519 | } |
| 520 | |
| 521 | /** |
| 522 | * Returns a specialized version of the {@code SystemColor} |
| 523 | * object for writing to the serialized stream. |
| 524 | * @serialData |
| 525 | * The value field of a serialized {@code SystemColor} object |
| 526 | * contains the array index of the system color instead of the |
| 527 | * rgb data for the system color. |
| 528 | * This index is used by the {@link #readResolve} method to |
| 529 | * resolve the deserialized objects back to the original |
| 530 | * static constant versions to ensure unique instances of |
| 531 | * each {@code SystemColor} object. |
| 532 | * @return a proxy {@code SystemColor} object with its value |
| 533 | * replaced by the corresponding system color index. |
| 534 | */ |
| 535 | private Object writeReplace() throws ObjectStreamException |
| 536 | { |
| 537 | // we put an array index in the SystemColor.value while serialize |
| 538 | // to keep compatibility. |
| 539 | SystemColor color = new SystemColor((byte)index); |
| 540 | color.value = index; |
| 541 | return color; |
| 542 | } |
| 543 | } |