Mercurial > projects > dwt-win
annotate dwt/graphics/Region.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 |
|---|---|
| 20 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2000, 2005 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> | |
| 20 | 12 *******************************************************************************/ |
| 13 module dwt.graphics.Region; | |
| 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.Point; | |
| 23 import dwt.graphics.Rectangle; | |
| 24 import dwt.graphics.Device; | |
| 25 | |
| 26 import tango.text.convert.Format; | |
|
212
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
117
diff
changeset
|
27 import dwt.dwthelper.utils; |
| 20 | 28 |
| 29 /** | |
| 30 * Instances of this class represent areas of an x-y coordinate | |
| 31 * system that are aggregates of the areas covered by a number | |
| 32 * of polygons. | |
| 33 * <p> | |
| 34 * Application code must explicitly invoke the <code>Region.dispose()</code> | |
| 35 * method to release the operating system resources managed by each instance | |
| 36 * when those instances are no longer required. | |
| 37 * </p> | |
| 38 */ | |
| 39 | |
| 40 public final class Region : Resource { | |
| 213 | 41 alias Resource.init_ init_; |
| 20 | 42 |
| 43 /** | |
| 44 * the OS resource for the region | |
| 45 * (Warning: This field is platform dependent) | |
| 46 * <p> | |
| 47 * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT | |
| 48 * public API. It is marked public only so that it can be shared | |
| 49 * within the packages provided by DWT. It is not available on all | |
| 50 * platforms and should never be accessed from application code. | |
| 51 * </p> | |
| 52 */ | |
| 53 public HRGN handle; | |
| 54 | |
| 55 /** | |
| 56 * Constructs a new empty region. | |
| 57 * | |
| 58 * @exception DWTError <ul> | |
| 59 * <li>ERROR_NO_HANDLES if a handle could not be obtained for region creation</li> | |
| 60 * </ul> | |
| 61 */ | |
| 62 public this () { | |
| 63 this(null); | |
| 64 } | |
| 65 | |
| 66 /** | |
| 67 * Constructs a new empty region. | |
| 68 * <p> | |
| 69 * You must dispose the region when it is no longer required. | |
| 70 * </p> | |
| 71 * | |
| 72 * @param device the device on which to allocate the region | |
| 73 * | |
| 74 * @exception IllegalArgumentException <ul> | |
| 75 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li> | |
| 76 * </ul> | |
| 77 * @exception DWTError <ul> | |
| 78 * <li>ERROR_NO_HANDLES if a handle could not be obtained for region creation</li> | |
| 79 * </ul> | |
| 80 * | |
| 81 * @see #dispose | |
| 82 * | |
| 83 * @since 3.0 | |
| 84 */ | |
| 85 public this (Device device) { | |
| 213 | 86 super(device); |
| 20 | 87 handle = OS.CreateRectRgn (0, 0, 0, 0); |
| 88 if (handle is null) DWT.error(DWT.ERROR_NO_HANDLES); | |
| 213 | 89 init_(); |
| 20 | 90 } |
| 91 | |
| 92 /** | |
| 93 * Constructs a new region given a handle to the operating | |
| 94 * system resources that it should represent. | |
| 95 * | |
| 96 * @param handle the handle for the result | |
| 97 */ | |
| 98 this(Device device, HRGN handle) { | |
| 213 | 99 super(device); |
| 20 | 100 this.handle = handle; |
| 101 } | |
| 102 | |
| 103 /** | |
| 104 * Adds the given polygon to the collection of polygons | |
| 105 * the receiver maintains to describe its area. | |
| 106 * | |
| 107 * @param pointArray points that describe the polygon to merge with the receiver | |
| 108 * | |
| 109 * @exception IllegalArgumentException <ul> | |
| 110 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 111 * </ul> | |
| 112 * @exception DWTException <ul> | |
| 113 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 114 * </ul> | |
| 115 * | |
| 116 * @since 3.0 | |
| 117 * | |
| 118 */ | |
| 119 public void add (int[] pointArray) { | |
| 120 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 121 if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 117 | 122 static if (OS.IsWinCE) DWT.error(DWT.ERROR_NOT_IMPLEMENTED); |
| 20 | 123 auto polyRgn = OS.CreatePolygonRgn(cast(POINT*)pointArray.ptr, pointArray.length / 2, OS.ALTERNATE); |
| 124 OS.CombineRgn (handle, handle, polyRgn, OS.RGN_OR); | |
| 125 OS.DeleteObject (polyRgn); | |
| 126 } | |
| 127 | |
| 128 /** | |
| 129 * Adds the given rectangle to the collection of polygons | |
| 130 * the receiver maintains to describe its area. | |
| 131 * | |
| 132 * @param rect the rectangle to merge with the receiver | |
| 133 * | |
| 134 * @exception IllegalArgumentException <ul> | |
| 135 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 136 * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> | |
| 137 * </ul> | |
| 138 * @exception DWTException <ul> | |
| 139 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 140 * </ul> | |
| 141 */ | |
| 142 public void add (Rectangle rect) { | |
| 143 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 144 if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 145 add (rect.x, rect.y, rect.width, rect.height); | |
| 146 } | |
| 147 | |
| 148 /** | |
| 149 * Adds the given rectangle to the collection of polygons | |
| 150 * the receiver maintains to describe its area. | |
| 151 * | |
| 152 * @param x the x coordinate of the rectangle | |
| 153 * @param y the y coordinate of the rectangle | |
| 154 * @param width the width coordinate of the rectangle | |
| 155 * @param height the height coordinate of the rectangle | |
| 156 * | |
| 157 * @exception IllegalArgumentException <ul> | |
| 158 * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> | |
| 159 * </ul> | |
| 160 * @exception DWTException <ul> | |
| 161 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 162 * </ul> | |
| 163 * | |
| 164 * @since 3.1 | |
| 165 */ | |
| 166 public void add (int x, int y, int width, int height) { | |
| 167 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 168 if (width < 0 || height < 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 169 auto rectRgn = OS.CreateRectRgn (x, y, x + width, y + height); | |
| 170 OS.CombineRgn (handle, handle, rectRgn, OS.RGN_OR); | |
| 171 OS.DeleteObject (rectRgn); | |
| 172 } | |
| 173 | |
| 174 /** | |
| 175 * Adds all of the polygons which make up the area covered | |
| 176 * by the argument to the collection of polygons the receiver | |
| 177 * maintains to describe its area. | |
| 178 * | |
| 179 * @param region the region to merge | |
| 180 * | |
| 181 * @exception IllegalArgumentException <ul> | |
| 182 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 183 * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> | |
| 184 * </ul> | |
| 185 * @exception DWTException <ul> | |
| 186 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 187 * </ul> | |
| 188 */ | |
| 189 public void add (Region region) { | |
| 190 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 191 if (region is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 192 if (region.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 193 OS.CombineRgn (handle, handle, region.handle, OS.RGN_OR); | |
| 194 } | |
| 195 | |
| 196 /** | |
| 197 * Returns <code>true</code> if the point specified by the | |
| 198 * arguments is inside the area specified by the receiver, | |
| 199 * and <code>false</code> otherwise. | |
| 200 * | |
| 201 * @param x the x coordinate of the point to test for containment | |
| 202 * @param y the y coordinate of the point to test for containment | |
| 203 * @return <code>true</code> if the region contains the point and <code>false</code> otherwise | |
| 204 * | |
| 205 * @exception DWTException <ul> | |
| 206 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 207 * </ul> | |
| 208 */ | |
| 209 public bool contains (int x, int y) { | |
| 210 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 211 return cast(bool) OS.PtInRegion (handle, x, y); | |
| 212 } | |
| 213 | |
| 214 /** | |
| 215 * Returns <code>true</code> if the given point is inside the | |
| 216 * area specified by the receiver, and <code>false</code> | |
| 217 * otherwise. | |
| 218 * | |
| 219 * @param pt the point to test for containment | |
| 220 * @return <code>true</code> if the region contains the point and <code>false</code> otherwise | |
| 221 * | |
| 222 * @exception IllegalArgumentException <ul> | |
| 223 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 224 * </ul> | |
| 225 * @exception DWTException <ul> | |
| 226 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 227 * </ul> | |
| 228 */ | |
| 229 public bool contains (Point pt) { | |
| 230 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 231 if (pt is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 232 return contains(pt.x, pt.y); | |
| 233 } | |
| 234 | |
| 213 | 235 void destroy () { |
| 20 | 236 OS.DeleteObject(handle); |
| 237 handle = null; | |
| 238 } | |
| 239 | |
| 240 /** | |
| 241 * Compares the argument to the receiver, and returns true | |
| 242 * if they represent the <em>same</em> object using a class | |
| 243 * specific comparison. | |
| 244 * | |
| 245 * @param object the object to compare with this object | |
| 246 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise | |
| 247 * | |
| 248 * @see #hashCode | |
| 249 */ | |
|
48
9a64a7781bab
Added override and alias, first chunk. Thanks torhu for doing this patch.
Frank Benoit <benoit@tionex.de>
parents:
23
diff
changeset
|
250 override public int opEquals (Object object) { |
| 20 | 251 if (this is object) return true; |
| 252 if (!(cast(Region)object)) return false; | |
| 253 Region rgn = cast(Region)object; | |
| 254 return handle is rgn.handle; | |
| 255 } | |
| 256 | |
| 257 /** | |
| 258 * Returns a rectangle which represents the rectangular | |
| 259 * union of the collection of polygons the receiver | |
| 260 * maintains to describe its area. | |
| 261 * | |
| 262 * @return a bounding rectangle for the region | |
| 263 * | |
| 264 * @exception DWTException <ul> | |
| 265 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 266 * </ul> | |
| 267 * | |
| 268 * @see Rectangle#union | |
| 269 */ | |
| 270 public Rectangle getBounds() { | |
| 271 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 272 RECT rect; | |
| 273 OS.GetRgnBox(handle, &rect); | |
| 274 return new Rectangle(rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top); | |
| 275 } | |
| 276 | |
| 277 /** | |
| 278 * Returns an integer hash code for the receiver. Any two | |
| 279 * objects that return <code>true</code> when passed to | |
| 280 * <code>equals</code> must return the same value for this | |
| 281 * method. | |
| 282 * | |
| 283 * @return the receiver's hash | |
| 284 * | |
| 285 * @see #equals | |
| 286 */ | |
|
48
9a64a7781bab
Added override and alias, first chunk. Thanks torhu for doing this patch.
Frank Benoit <benoit@tionex.de>
parents:
23
diff
changeset
|
287 override public hash_t toHash () { |
| 20 | 288 return cast(hash_t)handle; |
| 289 } | |
| 290 | |
| 291 /** | |
| 292 * Intersects the given rectangle to the collection of polygons | |
| 293 * the receiver maintains to describe its area. | |
| 294 * | |
| 295 * @param rect the rectangle to intersect with the receiver | |
| 296 * | |
| 297 * @exception IllegalArgumentException <ul> | |
| 298 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 299 * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> | |
| 300 * </ul> | |
| 301 * @exception DWTException <ul> | |
| 302 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 303 * </ul> | |
| 304 * | |
| 305 * @since 3.0 | |
| 306 */ | |
| 307 public void intersect (Rectangle rect) { | |
| 308 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 309 if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 310 intersect (rect.x, rect.y, rect.width, rect.height); | |
| 311 } | |
| 312 | |
| 313 /** | |
| 314 * Intersects the given rectangle to the collection of polygons | |
| 315 * the receiver maintains to describe its area. | |
| 316 * | |
| 317 * @param x the x coordinate of the rectangle | |
| 318 * @param y the y coordinate of the rectangle | |
| 319 * @param width the width coordinate of the rectangle | |
| 320 * @param height the height coordinate of the rectangle | |
| 321 * | |
| 322 * @exception IllegalArgumentException <ul> | |
| 323 * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> | |
| 324 * </ul> | |
| 325 * @exception DWTException <ul> | |
| 326 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 327 * </ul> | |
| 328 * | |
| 329 * @since 3.1 | |
| 330 */ | |
| 331 public void intersect (int x, int y, int width, int height) { | |
| 332 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 333 if (width < 0 || height < 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 334 auto rectRgn = OS.CreateRectRgn (x, y, x + width, y + height); | |
| 335 OS.CombineRgn (handle, handle, rectRgn, OS.RGN_AND); | |
| 336 OS.DeleteObject (rectRgn); | |
| 337 } | |
| 338 | |
| 339 /** | |
| 340 * Intersects all of the polygons which make up the area covered | |
| 341 * by the argument to the collection of polygons the receiver | |
| 342 * maintains to describe its area. | |
| 343 * | |
| 344 * @param region the region to intersect | |
| 345 * | |
| 346 * @exception IllegalArgumentException <ul> | |
| 347 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 348 * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> | |
| 349 * </ul> | |
| 350 * @exception DWTException <ul> | |
| 351 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 352 * </ul> | |
| 353 * | |
| 354 * @since 3.0 | |
| 355 */ | |
| 356 public void intersect (Region region) { | |
| 357 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 358 if (region is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 359 if (region.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 360 OS.CombineRgn (handle, handle, region.handle, OS.RGN_AND); | |
| 361 } | |
| 362 | |
| 363 /** | |
| 364 * Returns <code>true</code> if the rectangle described by the | |
| 365 * arguments intersects with any of the polygons the receiver | |
| 366 * maintains to describe its area, and <code>false</code> otherwise. | |
| 367 * | |
| 368 * @param x the x coordinate of the origin of the rectangle | |
| 369 * @param y the y coordinate of the origin of the rectangle | |
| 370 * @param width the width of the rectangle | |
| 371 * @param height the height of the rectangle | |
| 372 * @return <code>true</code> if the rectangle intersects with the receiver, and <code>false</code> otherwise | |
| 373 * | |
| 374 * @exception DWTException <ul> | |
| 375 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 376 * </ul> | |
| 377 * | |
| 378 * @see Rectangle#intersects(Rectangle) | |
| 379 */ | |
| 380 public bool intersects (int x, int y, int width, int height) { | |
| 381 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 382 RECT r; | |
| 383 OS.SetRect (&r, x, y, x + width, y + height); | |
| 384 return cast(bool) OS.RectInRegion (handle, &r); | |
| 385 } | |
| 386 | |
| 387 /** | |
| 388 * Returns <code>true</code> if the given rectangle intersects | |
| 389 * with any of the polygons the receiver maintains to describe | |
| 390 * its area and <code>false</code> otherwise. | |
| 391 * | |
| 392 * @param rect the rectangle to test for intersection | |
| 393 * @return <code>true</code> if the rectangle intersects with the receiver, and <code>false</code> otherwise | |
| 394 * | |
| 395 * @exception IllegalArgumentException <ul> | |
| 396 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 397 * </ul> | |
| 398 * @exception DWTException <ul> | |
| 399 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 400 * </ul> | |
| 401 * | |
| 402 * @see Rectangle#intersects(Rectangle) | |
| 403 */ | |
| 404 public bool intersects (Rectangle rect) { | |
| 405 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 406 if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 407 return intersects(rect.x, rect.y, rect.width, rect.height); | |
| 408 } | |
| 409 | |
| 410 /** | |
| 411 * Returns <code>true</code> if the region has been disposed, | |
| 412 * and <code>false</code> otherwise. | |
| 413 * <p> | |
| 414 * This method gets the dispose state for the region. | |
| 415 * When a region has been disposed, it is an error to | |
| 416 * invoke any other method using the region. | |
| 417 * | |
| 418 * @return <code>true</code> when the region is disposed, and <code>false</code> otherwise | |
| 419 */ | |
|
48
9a64a7781bab
Added override and alias, first chunk. Thanks torhu for doing this patch.
Frank Benoit <benoit@tionex.de>
parents:
23
diff
changeset
|
420 override public bool isDisposed() { |
| 20 | 421 return handle is null; |
| 422 } | |
| 423 | |
| 424 /** | |
| 425 * Returns <code>true</code> if the receiver does not cover any | |
| 426 * area in the (x, y) coordinate plane, and <code>false</code> if | |
| 427 * the receiver does cover some area in the plane. | |
| 428 * | |
| 429 * @return <code>true</code> if the receiver is empty, and <code>false</code> otherwise | |
| 430 * | |
| 431 * @exception DWTException <ul> | |
| 432 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 433 * </ul> | |
| 434 */ | |
| 435 public bool isEmpty () { | |
| 436 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 437 RECT rect; | |
| 438 auto result = OS.GetRgnBox (handle, &rect); | |
| 439 if (result is OS.NULLREGION) return true; | |
| 440 return ((rect.right - rect.left) <= 0) || ((rect.bottom - rect.top) <= 0); | |
| 441 } | |
| 442 | |
| 443 /** | |
| 444 * Subtracts the given polygon from the collection of polygons | |
| 445 * the receiver maintains to describe its area. | |
| 446 * | |
| 447 * @param pointArray points that describe the polygon to merge with the receiver | |
| 448 * | |
| 449 * @exception IllegalArgumentException <ul> | |
| 450 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 451 * </ul> | |
| 452 * @exception DWTException <ul> | |
| 453 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 454 * </ul> | |
| 455 * | |
| 456 * @since 3.0 | |
| 457 */ | |
| 458 public void subtract (int[] pointArray) { | |
| 459 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 460 if (pointArray is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 117 | 461 static if (OS.IsWinCE) DWT.error(DWT.ERROR_NOT_IMPLEMENTED); |
| 20 | 462 auto polyRgn = OS.CreatePolygonRgn(cast(POINT*)pointArray.ptr, pointArray.length / 2, OS.ALTERNATE); |
| 463 OS.CombineRgn (handle, handle, polyRgn, OS.RGN_DIFF); | |
| 464 OS.DeleteObject (polyRgn); | |
| 465 } | |
| 466 | |
| 467 /** | |
| 468 * Subtracts the given rectangle from the collection of polygons | |
| 469 * the receiver maintains to describe its area. | |
| 470 * | |
| 471 * @param rect the rectangle to subtract from the receiver | |
| 472 * | |
| 473 * @exception IllegalArgumentException <ul> | |
| 474 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 475 * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> | |
| 476 * </ul> | |
| 477 * @exception DWTException <ul> | |
| 478 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 479 * </ul> | |
| 480 * | |
| 481 * @since 3.0 | |
| 482 */ | |
| 483 public void subtract (Rectangle rect) { | |
| 484 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 485 if (rect is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 486 subtract (rect.x, rect.y, rect.width, rect.height); | |
| 487 } | |
| 488 | |
| 489 /** | |
| 490 * Subtracts the given rectangle from the collection of polygons | |
| 491 * the receiver maintains to describe its area. | |
| 492 * | |
| 493 * @param x the x coordinate of the rectangle | |
| 494 * @param y the y coordinate of the rectangle | |
| 495 * @param width the width coordinate of the rectangle | |
| 496 * @param height the height coordinate of the rectangle | |
| 497 * | |
| 498 * @exception IllegalArgumentException <ul> | |
| 499 * <li>ERROR_INVALID_ARGUMENT - if the rectangle's width or height is negative</li> | |
| 500 * </ul> | |
| 501 * @exception DWTException <ul> | |
| 502 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 503 * </ul> | |
| 504 * | |
| 505 * @since 3.1 | |
| 506 */ | |
| 507 public void subtract (int x, int y, int width, int height) { | |
| 508 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 509 if (width < 0 || height < 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 510 auto rectRgn = OS.CreateRectRgn (x, y, x + width, y + height); | |
| 511 OS.CombineRgn (handle, handle, rectRgn, OS.RGN_DIFF); | |
| 512 OS.DeleteObject (rectRgn); | |
| 513 } | |
| 514 | |
| 515 /** | |
| 516 * Subtracts all of the polygons which make up the area covered | |
| 517 * by the argument from the collection of polygons the receiver | |
| 518 * maintains to describe its area. | |
| 519 * | |
| 520 * @param region the region to subtract | |
| 521 * | |
| 522 * @exception IllegalArgumentException <ul> | |
| 523 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 524 * <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</li> | |
| 525 * </ul> | |
| 526 * @exception DWTException <ul> | |
| 527 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 528 * </ul> | |
| 529 * | |
| 530 * @since 3.0 | |
| 531 */ | |
| 532 public void subtract (Region region) { | |
| 533 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 534 if (region is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 535 if (region.isDisposed()) DWT.error(DWT.ERROR_INVALID_ARGUMENT); | |
| 536 OS.CombineRgn (handle, handle, region.handle, OS.RGN_DIFF); | |
| 537 } | |
| 538 | |
| 539 /** | |
| 540 * Translate all of the polygons the receiver maintains to describe | |
| 541 * its area by the specified point. | |
| 542 * | |
| 543 * @param x the x coordinate of the point to translate | |
| 544 * @param y the y coordinate of the point to translate | |
| 545 * | |
| 546 * @exception DWTException <ul> | |
| 547 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 548 * </ul> | |
| 549 * | |
| 550 * @since 3.1 | |
| 551 */ | |
| 552 public void translate (int x, int y) { | |
| 553 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 554 OS.OffsetRgn (handle, x, y); | |
| 555 } | |
| 556 | |
| 557 /** | |
| 558 * Translate all of the polygons the receiver maintains to describe | |
| 559 * its area by the specified point. | |
| 560 * | |
| 561 * @param pt the point to translate | |
| 562 * | |
| 563 * @exception IllegalArgumentException <ul> | |
| 564 * <li>ERROR_NULL_ARGUMENT - if the argument is null</li> | |
| 565 * </ul> | |
| 566 * @exception DWTException <ul> | |
| 567 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li> | |
| 568 * </ul> | |
| 569 * | |
| 570 * @since 3.1 | |
| 571 */ | |
| 572 public void translate (Point pt) { | |
| 573 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED); | |
| 574 if (pt is null) DWT.error(DWT.ERROR_NULL_ARGUMENT); | |
| 575 translate (pt.x, pt.y); | |
| 576 } | |
| 577 | |
| 578 /** | |
| 579 * Returns a string containing a concise, human-readable | |
| 580 * description of the receiver. | |
| 581 * | |
| 582 * @return a string representation of the receiver | |
| 583 */ | |
|
212
ab60f3309436
reverted the char[] to String and use the an alias.
Frank Benoit <benoit@tionex.de>
parents:
117
diff
changeset
|
584 override public String toString () { |
| 20 | 585 if (isDisposed()) return "Region {*DISPOSED*}"; |
| 586 return Format( "Region {{{}}", handle ); | |
| 587 } | |
| 588 | |
| 589 /** | |
| 590 * Invokes platform specific functionality to allocate a new region. | |
| 591 * <p> | |
| 592 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public | |
| 593 * API for <code>Region</code>. It is marked public only so that it | |
| 594 * can be shared within the packages provided by DWT. It is not | |
| 595 * available on all platforms, and should never be called from | |
| 596 * application code. | |
| 597 * </p> | |
| 598 * | |
| 599 * @param device the device on which to allocate the region | |
| 600 * @param handle the handle for the region | |
| 601 * @return a new region object containing the specified device and handle | |
| 602 */ | |
| 603 public static Region win32_new(Device device, HRGN handle) { | |
| 604 return new Region(device, handle); | |
| 605 } | |
| 606 | |
| 607 } |