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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2006, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package java.awt.geom; | ||
| 27 | |||
| 28 | import java.io.Serializable; | ||
| 29 | |||
| 30 | /** | ||
| 31 | * <CODE>Arc2D</CODE> is the abstract superclass for all objects that | ||
| 32 | * store a 2D arc defined by a framing rectangle, | ||
| 33 | * start angle, angular extent (length of the arc), and a closure type | ||
| 34 | * (<CODE>OPEN</CODE>, <CODE>CHORD</CODE>, or <CODE>PIE</CODE>). | ||
| 35 | * <p> | ||
| 36 | * <a name="inscribes"> | ||
| 37 | * The arc is a partial section of a full ellipse which | ||
| 38 | * inscribes the framing rectangle of its parent {@link RectangularShape}. | ||
| 39 | * </a> | ||
| 40 | * <a name="angles"> | ||
| 41 | * The angles are specified relative to the non-square | ||
| 42 | * framing rectangle such that 45 degrees always falls on the line from | ||
| 43 | * the center of the ellipse to the upper right corner of the framing | ||
| 44 | * rectangle. | ||
| 45 | * As a result, if the framing rectangle is noticeably longer along one | ||
| 46 | * axis than the other, the angles to the start and end of the arc segment | ||
| 47 | * will be skewed farther along the longer axis of the frame. | ||
| 48 | * </a> | ||
| 49 | * <p> | ||
| 50 | * The actual storage representation of the coordinates is left to | ||
| 51 | * the subclass. | ||
| 52 | * | ||
| 53 | * @author Jim Graham | ||
| 54 | * @since 1.2 | ||
| 55 | */ | ||
| 56 | public abstract class Arc2D extends RectangularShape { | ||
| 57 | |||
| 58 | /** | ||
| 59 | * The closure type for an open arc with no path segments | ||
| 60 | * connecting the two ends of the arc segment. | ||
| 61 | * @since 1.2 | ||
| 62 | */ | ||
| 63 | public final static int OPEN = 0; | ||
| 64 | |||
| 65 | /** | ||
| 66 | * The closure type for an arc closed by drawing a straight | ||
| 67 | * line segment from the start of the arc segment to the end of the | ||
| 68 | * arc segment. | ||
| 69 | * @since 1.2 | ||
| 70 | */ | ||
| 71 | public final static int CHORD = 1; | ||
| 72 | |||
| 73 | /** | ||
| 74 | * The closure type for an arc closed by drawing straight line | ||
| 75 | * segments from the start of the arc segment to the center | ||
| 76 | * of the full ellipse and from that point to the end of the arc segment. | ||
| 77 | * @since 1.2 | ||
| 78 | */ | ||
| 79 | public final static int PIE = 2; | ||
| 80 | |||
| 81 | /** | ||
| 82 | * This class defines an arc specified in {@code float} precision. | ||
| 83 | * @since 1.2 | ||
| 84 | */ | ||
| 85 | public static class Float extends Arc2D implements Serializable { | ||
| 86 | /** | ||
| 87 | * The X coordinate of the upper-left corner of the framing | ||
| 88 | * rectangle of the arc. | ||
| 89 | * @since 1.2 | ||
| 90 | * @serial | ||
| 91 | */ | ||
| 92 | public float x; | ||
| 93 | |||
| 94 | /** | ||
| 95 | * The Y coordinate of the upper-left corner of the framing | ||
| 96 | * rectangle of the arc. | ||
| 97 | * @since 1.2 | ||
| 98 | * @serial | ||
| 99 | */ | ||
| 100 | public float y; | ||
| 101 | |||
| 102 | /** | ||
| 103 | * The overall width of the full ellipse of which this arc is | ||
| 104 | * a partial section (not considering the | ||
| 105 | * angular extents). | ||
| 106 | * @since 1.2 | ||
| 107 | * @serial | ||
| 108 | */ | ||
| 109 | public float width; | ||
| 110 | |||
| 111 | /** | ||
| 112 | * The overall height of the full ellipse of which this arc is | ||
| 113 | * a partial section (not considering the | ||
| 114 | * angular extents). | ||
| 115 | * @since 1.2 | ||
| 116 | * @serial | ||
| 117 | */ | ||
| 118 | public float height; | ||
| 119 | |||
| 120 | /** | ||
| 121 | * The starting angle of the arc in degrees. | ||
| 122 | * @since 1.2 | ||
| 123 | * @serial | ||
| 124 | */ | ||
| 125 | public float start; | ||
| 126 | |||
| 127 | /** | ||
| 128 | * The angular extent of the arc in degrees. | ||
| 129 | * @since 1.2 | ||
| 130 | * @serial | ||
| 131 | */ | ||
| 132 | public float extent; | ||
| 133 | |||
| 134 | /** | ||
| 135 | * Constructs a new OPEN arc, initialized to location (0, 0), | ||
| 136 | * size (0, 0), angular extents (start = 0, extent = 0). | ||
| 137 | * @since 1.2 | ||
| 138 | */ | ||
| 139 | public Float() { | ||
| 140 | super(OPEN); | ||
| 141 | } | ||
| 142 | |||
| 143 | /** | ||
| 144 | * Constructs a new arc, initialized to location (0, 0), | ||
| 145 | * size (0, 0), angular extents (start = 0, extent = 0), and | ||
| 146 | * the specified closure type. | ||
| 147 | * | ||
| 148 | * @param type The closure type for the arc: | ||
| 149 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 150 | * @since 1.2 | ||
| 151 | */ | ||
| 152 | public Float(int type) { | ||
| 153 | super(type); | ||
| 154 | } | ||
| 155 | |||
| 156 | /** | ||
| 157 | * Constructs a new arc, initialized to the specified location, | ||
| 158 | * size, angular extents, and closure type. | ||
| 159 | * | ||
| 160 | * @param x The X coordinate of the upper-left corner of | ||
| 161 | * the arc's framing rectangle. | ||
| 162 | * @param y The Y coordinate of the upper-left corner of | ||
| 163 | * the arc's framing rectangle. | ||
| 164 | * @param w The overall width of the full ellipse of which | ||
| 165 | * this arc is a partial section. | ||
| 166 | * @param h The overall height of the full ellipse of which this | ||
| 167 | * arc is a partial section. | ||
| 168 | * @param start The starting angle of the arc in degrees. | ||
| 169 | * @param extent The angular extent of the arc in degrees. | ||
| 170 | * @param type The closure type for the arc: | ||
| 171 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 172 | * @since 1.2 | ||
| 173 | */ | ||
| 174 | public Float(float x, float y, float w, float h, | ||
| 175 | float start, float extent, int type) { | ||
| 176 | super(type); | ||
| 177 | this.x = x; | ||
| 178 | this.y = y; | ||
| 179 | this.width = w; | ||
| 180 | this.height = h; | ||
| 181 | this.start = start; | ||
| 182 | this.extent = extent; | ||
| 183 | } | ||
| 184 | |||
| 185 | /** | ||
| 186 | * Constructs a new arc, initialized to the specified location, | ||
| 187 | * size, angular extents, and closure type. | ||
| 188 | * | ||
| 189 | * @param ellipseBounds The framing rectangle that defines the | ||
| 190 | * outer boundary of the full ellipse of which this arc is a | ||
| 191 | * partial section. | ||
| 192 | * @param start The starting angle of the arc in degrees. | ||
| 193 | * @param extent The angular extent of the arc in degrees. | ||
| 194 | * @param type The closure type for the arc: | ||
| 195 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 196 | * @since 1.2 | ||
| 197 | */ | ||
| 198 | public Float(Rectangle2D ellipseBounds, | ||
| 199 | float start, float extent, int type) { | ||
| 200 | super(type); | ||
| 201 | this.x = (float) ellipseBounds.getX(); | ||
| 202 | this.y = (float) ellipseBounds.getY(); | ||
| 203 | this.width = (float) ellipseBounds.getWidth(); | ||
| 204 | this.height = (float) ellipseBounds.getHeight(); | ||
| 205 | this.start = start; | ||
| 206 | this.extent = extent; | ||
| 207 | } | ||
| 208 | |||
| 209 | /** | ||
| 210 | * {@inheritDoc} | ||
| 211 | * Note that the arc | ||
| 212 | * <a href="Arc2D.html#inscribes">partially inscribes</a> | ||
| 213 | * the framing rectangle of this {@code RectangularShape}. | ||
| 214 | * | ||
| 215 | * @since 1.2 | ||
| 216 | */ | ||
| 217 | public double getX() { | ||
| 218 | return (double) x; | ||
| 219 | } | ||
| 220 | |||
| 221 | /** | ||
| 222 | * {@inheritDoc} | ||
| 223 | * Note that the arc | ||
| 224 | * <a href="Arc2D.html#inscribes">partially inscribes</a> | ||
| 225 | * the framing rectangle of this {@code RectangularShape}. | ||
| 226 | * | ||
| 227 | * @since 1.2 | ||
| 228 | */ | ||
| 229 | public double getY() { | ||
| 230 | return (double) y; | ||
| 231 | } | ||
| 232 | |||
| 233 | /** | ||
| 234 | * {@inheritDoc} | ||
| 235 | * Note that the arc | ||
| 236 | * <a href="Arc2D.html#inscribes">partially inscribes</a> | ||
| 237 | * the framing rectangle of this {@code RectangularShape}. | ||
| 238 | * | ||
| 239 | * @since 1.2 | ||
| 240 | */ | ||
| 241 | public double getWidth() { | ||
| 242 | return (double) width; | ||
| 243 | } | ||
| 244 | |||
| 245 | /** | ||
| 246 | * {@inheritDoc} | ||
| 247 | * Note that the arc | ||
| 248 | * <a href="Arc2D.html#inscribes">partially inscribes</a> | ||
| 249 | * the framing rectangle of this {@code RectangularShape}. | ||
| 250 | * | ||
| 251 | * @since 1.2 | ||
| 252 | */ | ||
| 253 | public double getHeight() { | ||
| 254 | return (double) height; | ||
| 255 | } | ||
| 256 | |||
| 257 | /** | ||
| 258 | * {@inheritDoc} | ||
| 259 | * @since 1.2 | ||
| 260 | */ | ||
| 261 | public double getAngleStart() { | ||
| 262 | return (double) start; | ||
| 263 | } | ||
| 264 | |||
| 265 | /** | ||
| 266 | * {@inheritDoc} | ||
| 267 | * @since 1.2 | ||
| 268 | */ | ||
| 269 | public double getAngleExtent() { | ||
| 270 | return (double) extent; | ||
| 271 | } | ||
| 272 | |||
| 273 | /** | ||
| 274 | * {@inheritDoc} | ||
| 275 | * @since 1.2 | ||
| 276 | */ | ||
| 277 | public boolean isEmpty() { | ||
| 278 | return (width <= 0.0 || height <= 0.0); | ||
| 279 | } | ||
| 280 | |||
| 281 | /** | ||
| 282 | * {@inheritDoc} | ||
| 283 | * @since 1.2 | ||
| 284 | */ | ||
| 285 | public void setArc(double x, double y, double w, double h, | ||
| 286 | double angSt, double angExt, int closure) { | ||
| 287 | this.setArcType(closure); | ||
| 288 | this.x = (float) x; | ||
| 289 | this.y = (float) y; | ||
| 290 | this.width = (float) w; | ||
| 291 | this.height = (float) h; | ||
| 292 | this.start = (float) angSt; | ||
| 293 | this.extent = (float) angExt; | ||
| 294 | } | ||
| 295 | |||
| 296 | /** | ||
| 297 | * {@inheritDoc} | ||
| 298 | * @since 1.2 | ||
| 299 | */ | ||
| 300 | public void setAngleStart(double angSt) { | ||
| 301 | this.start = (float) angSt; | ||
| 302 | } | ||
| 303 | |||
| 304 | /** | ||
| 305 | * {@inheritDoc} | ||
| 306 | * @since 1.2 | ||
| 307 | */ | ||
| 308 | public void setAngleExtent(double angExt) { | ||
| 309 | this.extent = (float) angExt; | ||
| 310 | } | ||
| 311 | |||
| 312 | /** | ||
| 313 | * {@inheritDoc} | ||
| 314 | * @since 1.2 | ||
| 315 | */ | ||
| 316 | protected Rectangle2D makeBounds(double x, double y, | ||
| 317 | double w, double h) { | ||
| 318 | return new Rectangle2D.Float((float) x, (float) y, | ||
| 319 | (float) w, (float) h); | ||
| 320 | } | ||
| 321 | |||
| 322 | /* | ||
| 323 | * JDK 1.6 serialVersionUID | ||
| 324 | */ | ||
| 325 | private static final long serialVersionUID = 9130893014586380278L; | ||
| 326 | |||
| 327 | /** | ||
| 328 | * Writes the default serializable fields to the | ||
| 329 | * <code>ObjectOutputStream</code> followed by a byte | ||
| 330 | * indicating the arc type of this <code>Arc2D</code> | ||
| 331 | * instance. | ||
| 332 | * | ||
| 333 | * @serialData | ||
| 334 | * <ol> | ||
| 335 | * <li>The default serializable fields. | ||
| 336 | * <li> | ||
| 337 | * followed by a <code>byte</code> indicating the arc type | ||
| 338 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 339 | * </ol> | ||
| 340 | */ | ||
| 341 | private void writeObject(java.io.ObjectOutputStream s) | ||
| 342 | throws java.io.IOException | ||
| 343 | { | ||
| 344 | s.defaultWriteObject(); | ||
| 345 | |||
| 346 | s.writeByte(getArcType()); | ||
| 347 | } | ||
| 348 | |||
| 349 | /** | ||
| 350 | * Reads the default serializable fields from the | ||
| 351 | * <code>ObjectInputStream</code> followed by a byte | ||
| 352 | * indicating the arc type of this <code>Arc2D</code> | ||
| 353 | * instance. | ||
| 354 | * | ||
| 355 | * @serialData | ||
| 356 | * <ol> | ||
| 357 | * <li>The default serializable fields. | ||
| 358 | * <li> | ||
| 359 | * followed by a <code>byte</code> indicating the arc type | ||
| 360 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 361 | * </ol> | ||
| 362 | */ | ||
| 363 | private void readObject(java.io.ObjectInputStream s) | ||
| 364 | throws java.lang.ClassNotFoundException, java.io.IOException | ||
| 365 | { | ||
| 366 | s.defaultReadObject(); | ||
| 367 | |||
| 368 | try { | ||
| 369 | setArcType(s.readByte()); | ||
| 370 | } catch (IllegalArgumentException iae) { | ||
| 371 | throw new java.io.InvalidObjectException(iae.getMessage()); | ||
| 372 | } | ||
| 373 | } | ||
| 374 | } | ||
| 375 | |||
| 376 | /** | ||
| 377 | * This class defines an arc specified in {@code double} precision. | ||
| 378 | * @since 1.2 | ||
| 379 | */ | ||
| 380 | public static class Double extends Arc2D implements Serializable { | ||
| 381 | /** | ||
| 382 | * The X coordinate of the upper-left corner of the framing | ||
| 383 | * rectangle of the arc. | ||
| 384 | * @since 1.2 | ||
| 385 | * @serial | ||
| 386 | */ | ||
| 387 | public double x; | ||
| 388 | |||
| 389 | /** | ||
| 390 | * The Y coordinate of the upper-left corner of the framing | ||
| 391 | * rectangle of the arc. | ||
| 392 | * @since 1.2 | ||
| 393 | * @serial | ||
| 394 | */ | ||
| 395 | public double y; | ||
| 396 | |||
| 397 | /** | ||
| 398 | * The overall width of the full ellipse of which this arc is | ||
| 399 | * a partial section (not considering the angular extents). | ||
| 400 | * @since 1.2 | ||
| 401 | * @serial | ||
| 402 | */ | ||
| 403 | public double width; | ||
| 404 | |||
| 405 | /** | ||
| 406 | * The overall height of the full ellipse of which this arc is | ||
| 407 | * a partial section (not considering the angular extents). | ||
| 408 | * @since 1.2 | ||
| 409 | * @serial | ||
| 410 | */ | ||
| 411 | public double height; | ||
| 412 | |||
| 413 | /** | ||
| 414 | * The starting angle of the arc in degrees. | ||
| 415 | * @since 1.2 | ||
| 416 | * @serial | ||
| 417 | */ | ||
| 418 | public double start; | ||
| 419 | |||
| 420 | /** | ||
| 421 | * The angular extent of the arc in degrees. | ||
| 422 | * @since 1.2 | ||
| 423 | * @serial | ||
| 424 | */ | ||
| 425 | public double extent; | ||
| 426 | |||
| 427 | /** | ||
| 428 | * Constructs a new OPEN arc, initialized to location (0, 0), | ||
| 429 | * size (0, 0), angular extents (start = 0, extent = 0). | ||
| 430 | * @since 1.2 | ||
| 431 | */ | ||
| 432 | public Double() { | ||
| 433 | super(OPEN); | ||
| 434 | } | ||
| 435 | |||
| 436 | /** | ||
| 437 | * Constructs a new arc, initialized to location (0, 0), | ||
| 438 | * size (0, 0), angular extents (start = 0, extent = 0), and | ||
| 439 | * the specified closure type. | ||
| 440 | * | ||
| 441 | * @param type The closure type for the arc: | ||
| 442 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 443 | * @since 1.2 | ||
| 444 | */ | ||
| 445 | public Double(int type) { | ||
| 446 | super(type); | ||
| 447 | } | ||
| 448 | |||
| 449 | /** | ||
| 450 | * Constructs a new arc, initialized to the specified location, | ||
| 451 | * size, angular extents, and closure type. | ||
| 452 | * | ||
| 453 | * @param x The X coordinate of the upper-left corner | ||
| 454 | * of the arc's framing rectangle. | ||
| 455 | * @param y The Y coordinate of the upper-left corner | ||
| 456 | * of the arc's framing rectangle. | ||
| 457 | * @param w The overall width of the full ellipse of which this | ||
| 458 | * arc is a partial section. | ||
| 459 | * @param h The overall height of the full ellipse of which this | ||
| 460 | * arc is a partial section. | ||
| 461 | * @param start The starting angle of the arc in degrees. | ||
| 462 | * @param extent The angular extent of the arc in degrees. | ||
| 463 | * @param type The closure type for the arc: | ||
| 464 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 465 | * @since 1.2 | ||
| 466 | */ | ||
| 467 | public Double(double x, double y, double w, double h, | ||
| 468 | double start, double extent, int type) { | ||
| 469 | super(type); | ||
| 470 | this.x = x; | ||
| 471 | this.y = y; | ||
| 472 | this.width = w; | ||
| 473 | this.height = h; | ||
| 474 | this.start = start; | ||
| 475 | this.extent = extent; | ||
| 476 | } | ||
| 477 | |||
| 478 | /** | ||
| 479 | * Constructs a new arc, initialized to the specified location, | ||
| 480 | * size, angular extents, and closure type. | ||
| 481 | * | ||
| 482 | * @param ellipseBounds The framing rectangle that defines the | ||
| 483 | * outer boundary of the full ellipse of which this arc is a | ||
| 484 | * partial section. | ||
| 485 | * @param start The starting angle of the arc in degrees. | ||
| 486 | * @param extent The angular extent of the arc in degrees. | ||
| 487 | * @param type The closure type for the arc: | ||
| 488 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 489 | * @since 1.2 | ||
| 490 | */ | ||
| 491 | public Double(Rectangle2D ellipseBounds, | ||
| 492 | double start, double extent, int type) { | ||
| 493 | super(type); | ||
| 494 | this.x = ellipseBounds.getX(); | ||
| 495 | this.y = ellipseBounds.getY(); | ||
| 496 | this.width = ellipseBounds.getWidth(); | ||
| 497 | this.height = ellipseBounds.getHeight(); | ||
| 498 | this.start = start; | ||
| 499 | this.extent = extent; | ||
| 500 | } | ||
| 501 | |||
| 502 | /** | ||
| 503 | * {@inheritDoc} | ||
| 504 | * Note that the arc | ||
| 505 | * <a href="Arc2D.html#inscribes">partially inscribes</a> | ||
| 506 | * the framing rectangle of this {@code RectangularShape}. | ||
| 507 | * | ||
| 508 | * @since 1.2 | ||
| 509 | */ | ||
| 510 | public double getX() { | ||
| 511 | return x; | ||
| 512 | } | ||
| 513 | |||
| 514 | /** | ||
| 515 | * {@inheritDoc} | ||
| 516 | * Note that the arc | ||
| 517 | * <a href="Arc2D.html#inscribes">partially inscribes</a> | ||
| 518 | * the framing rectangle of this {@code RectangularShape}. | ||
| 519 | * | ||
| 520 | * @since 1.2 | ||
| 521 | */ | ||
| 522 | public double getY() { | ||
| 523 | return y; | ||
| 524 | } | ||
| 525 | |||
| 526 | /** | ||
| 527 | * {@inheritDoc} | ||
| 528 | * Note that the arc | ||
| 529 | * <a href="Arc2D.html#inscribes">partially inscribes</a> | ||
| 530 | * the framing rectangle of this {@code RectangularShape}. | ||
| 531 | * | ||
| 532 | * @since 1.2 | ||
| 533 | */ | ||
| 534 | public double getWidth() { | ||
| 535 | return width; | ||
| 536 | } | ||
| 537 | |||
| 538 | /** | ||
| 539 | * {@inheritDoc} | ||
| 540 | * Note that the arc | ||
| 541 | * <a href="Arc2D.html#inscribes">partially inscribes</a> | ||
| 542 | * the framing rectangle of this {@code RectangularShape}. | ||
| 543 | * | ||
| 544 | * @since 1.2 | ||
| 545 | */ | ||
| 546 | public double getHeight() { | ||
| 547 | return height; | ||
| 548 | } | ||
| 549 | |||
| 550 | /** | ||
| 551 | * {@inheritDoc} | ||
| 552 | * @since 1.2 | ||
| 553 | */ | ||
| 554 | public double getAngleStart() { | ||
| 555 | return start; | ||
| 556 | } | ||
| 557 | |||
| 558 | /** | ||
| 559 | * {@inheritDoc} | ||
| 560 | * @since 1.2 | ||
| 561 | */ | ||
| 562 | public double getAngleExtent() { | ||
| 563 | return extent; | ||
| 564 | } | ||
| 565 | |||
| 566 | /** | ||
| 567 | * {@inheritDoc} | ||
| 568 | * @since 1.2 | ||
| 569 | */ | ||
| 570 | public boolean isEmpty() { | ||
| 571 | return (width <= 0.0 || height <= 0.0); | ||
| 572 | } | ||
| 573 | |||
| 574 | /** | ||
| 575 | * {@inheritDoc} | ||
| 576 | * @since 1.2 | ||
| 577 | */ | ||
| 578 | public void setArc(double x, double y, double w, double h, | ||
| 579 | double angSt, double angExt, int closure) { | ||
| 580 | this.setArcType(closure); | ||
| 581 | this.x = x; | ||
| 582 | this.y = y; | ||
| 583 | this.width = w; | ||
| 584 | this.height = h; | ||
| 585 | this.start = angSt; | ||
| 586 | this.extent = angExt; | ||
| 587 | } | ||
| 588 | |||
| 589 | /** | ||
| 590 | * {@inheritDoc} | ||
| 591 | * @since 1.2 | ||
| 592 | */ | ||
| 593 | public void setAngleStart(double angSt) { | ||
| 594 | this.start = angSt; | ||
| 595 | } | ||
| 596 | |||
| 597 | /** | ||
| 598 | * {@inheritDoc} | ||
| 599 | * @since 1.2 | ||
| 600 | */ | ||
| 601 | public void setAngleExtent(double angExt) { | ||
| 602 | this.extent = angExt; | ||
| 603 | } | ||
| 604 | |||
| 605 | /** | ||
| 606 | * {@inheritDoc} | ||
| 607 | * @since 1.2 | ||
| 608 | */ | ||
| 609 | protected Rectangle2D makeBounds(double x, double y, | ||
| 610 | double w, double h) { | ||
| 611 | return new Rectangle2D.Double(x, y, w, h); | ||
| 612 | } | ||
| 613 | |||
| 614 | /* | ||
| 615 | * JDK 1.6 serialVersionUID | ||
| 616 | */ | ||
| 617 | private static final long serialVersionUID = 728264085846882001L; | ||
| 618 | |||
| 619 | /** | ||
| 620 | * Writes the default serializable fields to the | ||
| 621 | * <code>ObjectOutputStream</code> followed by a byte | ||
| 622 | * indicating the arc type of this <code>Arc2D</code> | ||
| 623 | * instance. | ||
| 624 | * | ||
| 625 | * @serialData | ||
| 626 | * <ol> | ||
| 627 | * <li>The default serializable fields. | ||
| 628 | * <li> | ||
| 629 | * followed by a <code>byte</code> indicating the arc type | ||
| 630 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 631 | * </ol> | ||
| 632 | */ | ||
| 633 | private void writeObject(java.io.ObjectOutputStream s) | ||
| 634 | throws java.io.IOException | ||
| 635 | { | ||
| 636 | s.defaultWriteObject(); | ||
| 637 | |||
| 638 | s.writeByte(getArcType()); | ||
| 639 | } | ||
| 640 | |||
| 641 | /** | ||
| 642 | * Reads the default serializable fields from the | ||
| 643 | * <code>ObjectInputStream</code> followed by a byte | ||
| 644 | * indicating the arc type of this <code>Arc2D</code> | ||
| 645 | * instance. | ||
| 646 | * | ||
| 647 | * @serialData | ||
| 648 | * <ol> | ||
| 649 | * <li>The default serializable fields. | ||
| 650 | * <li> | ||
| 651 | * followed by a <code>byte</code> indicating the arc type | ||
| 652 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 653 | * </ol> | ||
| 654 | */ | ||
| 655 | private void readObject(java.io.ObjectInputStream s) | ||
| 656 | throws java.lang.ClassNotFoundException, java.io.IOException | ||
| 657 | { | ||
| 658 | s.defaultReadObject(); | ||
| 659 | |||
| 660 | try { | ||
| 661 | setArcType(s.readByte()); | ||
| 662 | } catch (IllegalArgumentException iae) { | ||
| 663 | throw new java.io.InvalidObjectException(iae.getMessage()); | ||
| 664 | } | ||
| 665 | } | ||
| 666 | } | ||
| 667 | |||
| 668 | private int type; | ||
| 669 | |||
| 670 | /** | ||
| 671 | * This is an abstract class that cannot be instantiated directly. | ||
| 672 | * Type-specific implementation subclasses are available for | ||
| 673 | * instantiation and provide a number of formats for storing | ||
| 674 | * the information necessary to satisfy the various accessor | ||
| 675 | * methods below. | ||
| 676 | * <p> | ||
| 677 | * This constructor creates an object with a default closure | ||
| 678 | * type of {@link #OPEN}. It is provided only to enable | ||
| 679 | * serialization of subclasses. | ||
| 680 | * | ||
| 681 | * @see java.awt.geom.Arc2D.Float | ||
| 682 | * @see java.awt.geom.Arc2D.Double | ||
| 683 | */ | ||
| 684 | protected Arc2D() { | ||
| 685 | this(OPEN); | ||
| 686 | } | ||
| 687 | |||
| 688 | /** | ||
| 689 | * This is an abstract class that cannot be instantiated directly. | ||
| 690 | * Type-specific implementation subclasses are available for | ||
| 691 | * instantiation and provide a number of formats for storing | ||
| 692 | * the information necessary to satisfy the various accessor | ||
| 693 | * methods below. | ||
| 694 | * | ||
| 695 | * @param type The closure type of this arc: | ||
| 696 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 697 | * @see java.awt.geom.Arc2D.Float | ||
| 698 | * @see java.awt.geom.Arc2D.Double | ||
| 699 | * @since 1.2 | ||
| 700 | */ | ||
| 701 | protected Arc2D(int type) { | ||
| 702 | setArcType(type); | ||
| 703 | } | ||
| 704 | |||
| 705 | /** | ||
| 706 | * Returns the starting angle of the arc. | ||
| 707 | * | ||
| 708 | * @return A double value that represents the starting angle | ||
| 709 | * of the arc in degrees. | ||
| 710 | * @see #setAngleStart | ||
| 711 | * @since 1.2 | ||
| 712 | */ | ||
| 713 | public abstract double getAngleStart(); | ||
| 714 | |||
| 715 | /** | ||
| 716 | * Returns the angular extent of the arc. | ||
| 717 | * | ||
| 718 | * @return A double value that represents the angular extent | ||
| 719 | * of the arc in degrees. | ||
| 720 | * @see #setAngleExtent | ||
| 721 | * @since 1.2 | ||
| 722 | */ | ||
| 723 | public abstract double getAngleExtent(); | ||
| 724 | |||
| 725 | /** | ||
| 726 | * Returns the arc closure type of the arc: {@link #OPEN}, | ||
| 727 | * {@link #CHORD}, or {@link #PIE}. | ||
| 728 | * @return One of the integer constant closure types defined | ||
| 729 | * in this class. | ||
| 730 | * @see #setArcType | ||
| 731 | * @since 1.2 | ||
| 732 | */ | ||
| 733 | public int getArcType() { | ||
| 734 | return type; | ||
| 735 | } | ||
| 736 | |||
| 737 | /** | ||
| 738 | * Returns the starting point of the arc. This point is the | ||
| 739 | * intersection of the ray from the center defined by the | ||
| 740 | * starting angle and the elliptical boundary of the arc. | ||
| 741 | * | ||
| 742 | * @return A <CODE>Point2D</CODE> object representing the | ||
| 743 | * x,y coordinates of the starting point of the arc. | ||
| 744 | * @since 1.2 | ||
| 745 | */ | ||
| 746 | public Point2D getStartPoint() { | ||
| 747 | double angle = Math.toRadians(-getAngleStart()); | ||
| 748 | double x = getX() + (Math.cos(angle) * 0.5 + 0.5) * getWidth(); | ||
| 749 | double y = getY() + (Math.sin(angle) * 0.5 + 0.5) * getHeight(); | ||
| 750 | return new Point2D.Double(x, y); | ||
| 751 | } | ||
| 752 | |||
| 753 | /** | ||
| 754 | * Returns the ending point of the arc. This point is the | ||
| 755 | * intersection of the ray from the center defined by the | ||
| 756 | * starting angle plus the angular extent of the arc and the | ||
| 757 | * elliptical boundary of the arc. | ||
| 758 | * | ||
| 759 | * @return A <CODE>Point2D</CODE> object representing the | ||
| 760 | * x,y coordinates of the ending point of the arc. | ||
| 761 | * @since 1.2 | ||
| 762 | */ | ||
| 763 | public Point2D getEndPoint() { | ||
| 764 | double angle = Math.toRadians(-getAngleStart() - getAngleExtent()); | ||
| 765 | double x = getX() + (Math.cos(angle) * 0.5 + 0.5) * getWidth(); | ||
| 766 | double y = getY() + (Math.sin(angle) * 0.5 + 0.5) * getHeight(); | ||
| 767 | return new Point2D.Double(x, y); | ||
| 768 | } | ||
| 769 | |||
| 770 | /** | ||
| 771 | * Sets the location, size, angular extents, and closure type of | ||
| 772 | * this arc to the specified double values. | ||
| 773 | * | ||
| 774 | * @param x The X coordinate of the upper-left corner of the arc. | ||
| 775 | * @param y The Y coordinate of the upper-left corner of the arc. | ||
| 776 | * @param w The overall width of the full ellipse of which | ||
| 777 | * this arc is a partial section. | ||
| 778 | * @param h The overall height of the full ellipse of which | ||
| 779 | * this arc is a partial section. | ||
| 780 | * @param angSt The starting angle of the arc in degrees. | ||
| 781 | * @param angExt The angular extent of the arc in degrees. | ||
| 782 | * @param closure The closure type for the arc: | ||
| 783 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 784 | * @since 1.2 | ||
| 785 | */ | ||
| 786 | public abstract void setArc(double x, double y, double w, double h, | ||
| 787 | double angSt, double angExt, int closure); | ||
| 788 | |||
| 789 | /** | ||
| 790 | * Sets the location, size, angular extents, and closure type of | ||
| 791 | * this arc to the specified values. | ||
| 792 | * | ||
| 793 | * @param loc The <CODE>Point2D</CODE> representing the coordinates of | ||
| 794 | * the upper-left corner of the arc. | ||
| 795 | * @param size The <CODE>Dimension2D</CODE> representing the width | ||
| 796 | * and height of the full ellipse of which this arc is | ||
| 797 | * a partial section. | ||
| 798 | * @param angSt The starting angle of the arc in degrees. | ||
| 799 | * @param angExt The angular extent of the arc in degrees. | ||
| 800 | * @param closure The closure type for the arc: | ||
| 801 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 802 | * @since 1.2 | ||
| 803 | */ | ||
| 804 | public void setArc(Point2D loc, Dimension2D size, | ||
| 805 | double angSt, double angExt, int closure) { | ||
| 806 | setArc(loc.getX(), loc.getY(), size.getWidth(), size.getHeight(), | ||
| 807 | angSt, angExt, closure); | ||
| 808 | } | ||
| 809 | |||
| 810 | /** | ||
| 811 | * Sets the location, size, angular extents, and closure type of | ||
| 812 | * this arc to the specified values. | ||
| 813 | * | ||
| 814 | * @param rect The framing rectangle that defines the | ||
| 815 | * outer boundary of the full ellipse of which this arc is a | ||
| 816 | * partial section. | ||
| 817 | * @param angSt The starting angle of the arc in degrees. | ||
| 818 | * @param angExt The angular extent of the arc in degrees. | ||
| 819 | * @param closure The closure type for the arc: | ||
| 820 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 821 | * @since 1.2 | ||
| 822 | */ | ||
| 823 | public void setArc(Rectangle2D rect, double angSt, double angExt, | ||
| 824 | int closure) { | ||
| 825 | setArc(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight(), | ||
| 826 | angSt, angExt, closure); | ||
| 827 | } | ||
| 828 | |||
| 829 | /** | ||
| 830 | * Sets this arc to be the same as the specified arc. | ||
| 831 | * | ||
| 832 | * @param a The <CODE>Arc2D</CODE> to use to set the arc's values. | ||
| 833 | * @since 1.2 | ||
| 834 | */ | ||
| 835 | public void setArc(Arc2D a) { | ||
| 836 | setArc(a.getX(), a.getY(), a.getWidth(), a.getHeight(), | ||
| 837 | a.getAngleStart(), a.getAngleExtent(), a.type); | ||
| 838 | } | ||
| 839 | |||
| 840 | /** | ||
| 841 | * Sets the position, bounds, angular extents, and closure type of | ||
| 842 | * this arc to the specified values. The arc is defined by a center | ||
| 843 | * point and a radius rather than a framing rectangle for the full ellipse. | ||
| 844 | * | ||
| 845 | * @param x The X coordinate of the center of the arc. | ||
| 846 | * @param y The Y coordinate of the center of the arc. | ||
| 847 | * @param radius The radius of the arc. | ||
| 848 | * @param angSt The starting angle of the arc in degrees. | ||
| 849 | * @param angExt The angular extent of the arc in degrees. | ||
| 850 | * @param closure The closure type for the arc: | ||
| 851 | * {@link #OPEN}, {@link #CHORD}, or {@link #PIE}. | ||
| 852 | * @since 1.2 | ||
| 853 | */ | ||
| 854 | public void setArcByCenter(double x, double y, double radius, | ||
| 855 | double angSt, double angExt, int closure) { | ||
| 856 | setArc(x - radius, y - radius, radius * 2.0, radius * 2.0, | ||
| 857 | angSt, angExt, closure); | ||
| 858 | } | ||
| 859 | |||
| 860 | /** | ||
| 861 | * Sets the position, bounds, and angular extents of this arc to the | ||
| 862 | * specified value. The starting angle of the arc is tangent to the | ||
| 863 | * line specified by points (p1, p2), the ending angle is tangent to | ||
| 864 | * the line specified by points (p2, p3), and the arc has the | ||
| 865 | * specified radius. | ||
| 866 | * | ||
| 867 | * @param p1 The first point that defines the arc. The starting | ||
| 868 | * angle of the arc is tangent to the line specified by points (p1, p2). | ||
| 869 | * @param p2 The second point that defines the arc. The starting | ||
| 870 | * angle of the arc is tangent to the line specified by points (p1, p2). | ||
| 871 | * The ending angle of the arc is tangent to the line specified by | ||
| 872 | * points (p2, p3). | ||
| 873 | * @param p3 The third point that defines the arc. The ending angle | ||
| 874 | * of the arc is tangent to the line specified by points (p2, p3). | ||
| 875 | * @param radius The radius of the arc. | ||
| 876 | * @since 1.2 | ||
| 877 | */ | ||
| 878 | public void setArcByTangent(Point2D p1, Point2D p2, Point2D p3, | ||
| 879 | double radius) { | ||
| 880 | double ang1 = Math.atan2(p1.getY() - p2.getY(), | ||
| 881 | p1.getX() - p2.getX()); | ||
| 882 | double ang2 = Math.atan2(p3.getY() - p2.getY(), | ||
| 883 | p3.getX() - p2.getX()); | ||
| 884 | double diff = ang2 - ang1; | ||
| 885 | if (diff > Math.PI) { | ||
| 886 | ang2 -= Math.PI * 2.0; | ||
| 887 | } else if (diff < -Math.PI) { | ||
| 888 | ang2 += Math.PI * 2.0; | ||
| 889 | } | ||
| 890 | double bisect = (ang1 + ang2) / 2.0; | ||
| 891 | double theta = Math.abs(ang2 - bisect); | ||
| 892 | double dist = radius / Math.sin(theta); | ||
| 893 | double x = p2.getX() + dist * Math.cos(bisect); | ||
| 894 | double y = p2.getY() + dist * Math.sin(bisect); | ||
| 895 | // REMIND: This needs some work... | ||
| 896 | if (ang1 < ang2) { | ||
| 897 | ang1 -= Math.PI / 2.0; | ||
| 898 | ang2 += Math.PI / 2.0; | ||
| 899 | } else { | ||
| 900 | ang1 += Math.PI / 2.0; | ||
| 901 | ang2 -= Math.PI / 2.0; | ||
| 902 | } | ||
| 903 | ang1 = Math.toDegrees(-ang1); | ||
| 904 | ang2 = Math.toDegrees(-ang2); | ||
| 905 | diff = ang2 - ang1; | ||
| 906 | if (diff < 0) { | ||
| 907 | diff += 360; | ||
| 908 | } else { | ||
| 909 | diff -= 360; | ||
| 910 | } | ||
| 911 | setArcByCenter(x, y, radius, ang1, diff, type); | ||
| 912 | } | ||
| 913 | |||
| 914 | /** | ||
| 915 | * Sets the starting angle of this arc to the specified double | ||
| 916 | * value. | ||
| 917 | * | ||
| 918 | * @param angSt The starting angle of the arc in degrees. | ||
| 919 | * @see #getAngleStart | ||
| 920 | * @since 1.2 | ||
| 921 | */ | ||
| 922 | public abstract void setAngleStart(double angSt); | ||
| 923 | |||
| 924 | /** | ||
| 925 | * Sets the angular extent of this arc to the specified double | ||
| 926 | * value. | ||
| 927 | * | ||
| 928 | * @param angExt The angular extent of the arc in degrees. | ||
| 929 | * @see #getAngleExtent | ||
| 930 | * @since 1.2 | ||
| 931 | */ | ||
| 932 | public abstract void setAngleExtent(double angExt); | ||
| 933 | |||
| 934 | /** | ||
| 935 | * Sets the starting angle of this arc to the angle that the | ||
| 936 | * specified point defines relative to the center of this arc. | ||
| 937 | * The angular extent of the arc will remain the same. | ||
| 938 | * | ||
| 939 | * @param p The <CODE>Point2D</CODE> that defines the starting angle. | ||
| 940 | * @see #getAngleStart | ||
| 941 | * @since 1.2 | ||
| 942 | */ | ||
| 943 | public void setAngleStart(Point2D p) { | ||
| 944 | // Bias the dx and dy by the height and width of the oval. | ||
| 945 | double dx = getHeight() * (p.getX() - getCenterX()); | ||
| 946 | double dy = getWidth() * (p.getY() - getCenterY()); | ||
| 947 | setAngleStart(-Math.toDegrees(Math.atan2(dy, dx))); | ||
| 948 | } | ||
| 949 | |||
| 950 | /** | ||
| 951 | * Sets the starting angle and angular extent of this arc using two | ||
| 952 | * sets of coordinates. The first set of coordinates is used to | ||
| 953 | * determine the angle of the starting point relative to the arc's | ||
| 954 | * center. The second set of coordinates is used to determine the | ||
| 955 | * angle of the end point relative to the arc's center. | ||
| 956 | * The arc will always be non-empty and extend counterclockwise | ||
| 957 | * from the first point around to the second point. | ||
| 958 | * | ||
| 959 | * @param x1 The X coordinate of the arc's starting point. | ||
| 960 | * @param y1 The Y coordinate of the arc's starting point. | ||
| 961 | * @param x2 The X coordinate of the arc's ending point. | ||
| 962 | * @param y2 The Y coordinate of the arc's ending point. | ||
| 963 | * @since 1.2 | ||
| 964 | */ | ||
| 965 | public void setAngles(double x1, double y1, double x2, double y2) { | ||
| 966 | double x = getCenterX(); | ||
| 967 | double y = getCenterY(); | ||
| 968 | double w = getWidth(); | ||
| 969 | double h = getHeight(); | ||
| 970 | // Note: reversing the Y equations negates the angle to adjust | ||
| 971 | // for the upside down coordinate system. | ||
| 972 | // Also we should bias atans by the height and width of the oval. | ||
| 973 | double ang1 = Math.atan2(w * (y - y1), h * (x1 - x)); | ||
| 974 | double ang2 = Math.atan2(w * (y - y2), h * (x2 - x)); | ||
| 975 | ang2 -= ang1; | ||
| 976 | if (ang2 <= 0.0) { | ||
| 977 | ang2 += Math.PI * 2.0; | ||
| 978 | } | ||
| 979 | setAngleStart(Math.toDegrees(ang1)); | ||
| 980 | setAngleExtent(Math.toDegrees(ang2)); | ||
| 981 | } | ||
| 982 | |||
| 983 | /** | ||
| 984 | * Sets the starting angle and angular extent of this arc using | ||
| 985 | * two points. The first point is used to determine the angle of | ||
| 986 | * the starting point relative to the arc's center. | ||
| 987 | * The second point is used to determine the angle of the end point | ||
| 988 | * relative to the arc's center. | ||
| 989 | * The arc will always be non-empty and extend counterclockwise | ||
| 990 | * from the first point around to the second point. | ||
| 991 | * | ||
| 992 | * @param p1 The <CODE>Point2D</CODE> that defines the arc's | ||
| 993 | * starting point. | ||
| 994 | * @param p2 The <CODE>Point2D</CODE> that defines the arc's | ||
| 995 | * ending point. | ||
| 996 | * @since 1.2 | ||
| 997 | */ | ||
| 998 | public void setAngles(Point2D p1, Point2D p2) { | ||
| 999 | setAngles(p1.getX(), p1.getY(), p2.getX(), p2.getY()); | ||
| 1000 | } | ||
| 1001 | |||
| 1002 | /** | ||
| 1003 | * Sets the closure type of this arc to the specified value: | ||
| 1004 | * <CODE>OPEN</CODE>, <CODE>CHORD</CODE>, or <CODE>PIE</CODE>. | ||
| 1005 | * | ||
| 1006 | * @param type The integer constant that represents the closure | ||
| 1007 | * type of this arc: {@link #OPEN}, {@link #CHORD}, or | ||
| 1008 | * {@link #PIE}. | ||
| 1009 | * | ||
| 1010 | * @throws IllegalArgumentException if <code>type</code> is not | ||
| 1011 | * 0, 1, or 2.+ | ||
| 1012 | * @see #getArcType | ||
| 1013 | * @since 1.2 | ||
| 1014 | */ | ||
| 1015 | public void setArcType(int type) { | ||
| 1016 | if (type < OPEN || type > PIE) { | ||
| 1017 | throw new IllegalArgumentException("invalid type for Arc: "+type); | ||
| 1018 | } | ||
| 1019 | this.type = type; | ||
| 1020 | } | ||
| 1021 | |||
| 1022 | /** | ||
| 1023 | * {@inheritDoc} | ||
| 1024 | * Note that the arc | ||
| 1025 | * <a href="Arc2D.html#inscribes">partially inscribes</a> | ||
| 1026 | * the framing rectangle of this {@code RectangularShape}. | ||
| 1027 | * | ||
| 1028 | * @since 1.2 | ||
| 1029 | */ | ||
| 1030 | public void setFrame(double x, double y, double w, double h) { | ||
| 1031 | setArc(x, y, w, h, getAngleStart(), getAngleExtent(), type); | ||
| 1032 | } | ||
| 1033 | |||
| 1034 | /** | ||
| 1035 | * Returns the high-precision framing rectangle of the arc. The framing | ||
| 1036 | * rectangle contains only the part of this <code>Arc2D</code> that is | ||
| 1037 | * in between the starting and ending angles and contains the pie | ||
| 1038 | * wedge, if this <code>Arc2D</code> has a <code>PIE</code> closure type. | ||
| 1039 | * <p> | ||
| 1040 | * This method differs from the | ||
| 1041 | * {@link RectangularShape#getBounds() getBounds} in that the | ||
| 1042 | * <code>getBounds</code> method only returns the bounds of the | ||
| 1043 | * enclosing ellipse of this <code>Arc2D</code> without considering | ||
| 1044 | * the starting and ending angles of this <code>Arc2D</code>. | ||
| 1045 | * | ||
| 1046 | * @return the <CODE>Rectangle2D</CODE> that represents the arc's | ||
| 1047 | * framing rectangle. | ||
| 1048 | * @since 1.2 | ||
| 1049 | */ | ||
| 1050 | public Rectangle2D getBounds2D() { | ||
| 1051 | if (isEmpty()) { | ||
| 1052 | return makeBounds(getX(), getY(), getWidth(), getHeight()); | ||
| 1053 | } | ||
| 1054 | double x1, y1, x2, y2; | ||
| 1055 | if (getArcType() == PIE) { | ||
| 1056 | x1 = y1 = x2 = y2 = 0.0; | ||
| 1057 | } else { | ||
| 1058 | x1 = y1 = 1.0; | ||
| 1059 | x2 = y2 = -1.0; | ||
| 1060 | } | ||
| 1061 | double angle = 0.0; | ||
| 1062 | for (int i = 0; i < 6; i++) { | ||
| 1063 | if (i < 4) { | ||
| 1064 | // 0-3 are the four quadrants | ||
| 1065 | angle += 90.0; | ||
| 1066 | if (!containsAngle(angle)) { | ||
| 1067 | continue; | ||
| 1068 | } | ||
| 1069 | } else if (i == 4) { | ||
| 1070 | // 4 is start angle | ||
| 1071 | angle = getAngleStart(); | ||
| 1072 | } else { | ||
| 1073 | // 5 is end angle | ||
| 1074 | angle += getAngleExtent(); | ||
| 1075 | } | ||
| 1076 | double rads = Math.toRadians(-angle); | ||
| 1077 | double xe = Math.cos(rads); | ||
| 1078 | double ye = Math.sin(rads); | ||
| 1079 | x1 = Math.min(x1, xe); | ||
| 1080 | y1 = Math.min(y1, ye); | ||
| 1081 | x2 = Math.max(x2, xe); | ||
| 1082 | y2 = Math.max(y2, ye); | ||
| 1083 | } | ||
| 1084 | double w = getWidth(); | ||
| 1085 | double h = getHeight(); | ||
| 1086 | x2 = (x2 - x1) * 0.5 * w; | ||
| 1087 | y2 = (y2 - y1) * 0.5 * h; | ||
| 1088 | x1 = getX() + (x1 * 0.5 + 0.5) * w; | ||
| 1089 | y1 = getY() + (y1 * 0.5 + 0.5) * h; | ||
| 1090 | return makeBounds(x1, y1, x2, y2); | ||
| 1091 | } | ||
| 1092 | |||
| 1093 | /** | ||
| 1094 | * Constructs a <code>Rectangle2D</code> of the appropriate precision | ||
| 1095 | * to hold the parameters calculated to be the framing rectangle | ||
| 1096 | * of this arc. | ||
| 1097 | * | ||
| 1098 | * @param x The X coordinate of the upper-left corner of the | ||
| 1099 | * framing rectangle. | ||
| 1100 | * @param y The Y coordinate of the upper-left corner of the | ||
| 1101 | * framing rectangle. | ||
| 1102 | * @param w The width of the framing rectangle. | ||
| 1103 | * @param h The height of the framing rectangle. | ||
| 1104 | * @return a <code>Rectangle2D</code> that is the framing rectangle | ||
| 1105 | * of this arc. | ||
| 1106 | * @since 1.2 | ||
| 1107 | */ | ||
| 1108 | protected abstract Rectangle2D makeBounds(double x, double y, | ||
| 1109 | double w, double h); | ||
| 1110 | |||
| 1111 | /* | ||
| 1112 | * Normalizes the specified angle into the range -180 to 180. | ||
| 1113 | */ | ||
| 1114 | static double normalizeDegrees(double angle) { | ||
| 1115 | if (angle > 180.0) { | ||
| 1116 | if (angle <= (180.0 + 360.0)) { | ||
| 1117 | angle = angle - 360.0; | ||
| 1118 | } else { | ||
| 1119 | angle = Math.IEEEremainder(angle, 360.0); | ||
| 1120 | // IEEEremainder can return -180 here for some input values... | ||
| 1121 | if (angle == -180.0) { | ||
| 1122 | angle = 180.0; | ||
| 1123 | } | ||
| 1124 | } | ||
| 1125 | } else if (angle <= -180.0) { | ||
| 1126 | if (angle > (-180.0 - 360.0)) { | ||
| 1127 | angle = angle + 360.0; | ||
| 1128 | } else { | ||
| 1129 | angle = Math.IEEEremainder(angle, 360.0); | ||
| 1130 | // IEEEremainder can return -180 here for some input values... | ||
| 1131 | if (angle == -180.0) { | ||
| 1132 | angle = 180.0; | ||
| 1133 | } | ||
| 1134 | } | ||
| 1135 | } | ||
| 1136 | return angle; | ||
| 1137 | } | ||
| 1138 | |||
| 1139 | /** | ||
| 1140 | * Determines whether or not the specified angle is within the | ||
| 1141 | * angular extents of the arc. | ||
| 1142 | * | ||
| 1143 | * @param angle The angle to test. | ||
| 1144 | * | ||
| 1145 | * @return <CODE>true</CODE> if the arc contains the angle, | ||
| 1146 | * <CODE>false</CODE> if the arc doesn't contain the angle. | ||
| 1147 | * @since 1.2 | ||
| 1148 | */ | ||
| 1149 | public boolean containsAngle(double angle) { | ||
| 1150 | double angExt = getAngleExtent(); | ||
| 1151 | boolean backwards = (angExt < 0.0); | ||
| 1152 | if (backwards) { | ||
| 1153 | angExt = -angExt; | ||
| 1154 | } | ||
| 1155 | if (angExt >= 360.0) { | ||
| 1156 | return true; | ||
| 1157 | } | ||
| 1158 | angle = normalizeDegrees(angle) - normalizeDegrees(getAngleStart()); | ||
| 1159 | if (backwards) { | ||
| 1160 | angle = -angle; | ||
| 1161 | } | ||
| 1162 | if (angle < 0.0) { | ||
| 1163 | angle += 360.0; | ||
| 1164 | } | ||
| 1165 | |||
| 1166 | |||
| 1167 | return (angle >= 0.0) && (angle < angExt); | ||
| 1168 | } | ||
| 1169 | |||
| 1170 | /** | ||
| 1171 | * Determines whether or not the specified point is inside the boundary | ||
| 1172 | * of the arc. | ||
| 1173 | * | ||
| 1174 | * @param x The X coordinate of the point to test. | ||
| 1175 | * @param y The Y coordinate of the point to test. | ||
| 1176 | * | ||
| 1177 | * @return <CODE>true</CODE> if the point lies within the bound of | ||
| 1178 | * the arc, <CODE>false</CODE> if the point lies outside of the | ||
| 1179 | * arc's bounds. | ||
| 1180 | * @since 1.2 | ||
| 1181 | */ | ||
| 1182 | public boolean contains(double x, double y) { | ||
| 1183 | // Normalize the coordinates compared to the ellipse | ||
| 1184 | // having a center at 0,0 and a radius of 0.5. | ||
| 1185 | double ellw = getWidth(); | ||
| 1186 | if (ellw <= 0.0) { | ||
| 1187 | return false; | ||
| 1188 | } | ||
| 1189 | double normx = (x - getX()) / ellw - 0.5; | ||
| 1190 | double ellh = getHeight(); | ||
| 1191 | if (ellh <= 0.0) { | ||
| 1192 | return false; | ||
| 1193 | } | ||
| 1194 | double normy = (y - getY()) / ellh - 0.5; | ||
| 1195 | double distSq = (normx * normx + normy * normy); | ||
| 1196 | if (distSq >= 0.25) { | ||
| 1197 | return false; | ||
| 1198 | } | ||
| 1199 | double angExt = Math.abs(getAngleExtent()); | ||
| 1200 | if (angExt >= 360.0) { | ||
| 1201 | return true; | ||
| 1202 | } | ||
| 1203 | boolean inarc = containsAngle(-Math.toDegrees(Math.atan2(normy, | ||
| 1204 | normx))); | ||
| 1205 | if (type == PIE) { | ||
| 1206 | return inarc; | ||
| 1207 | } | ||
| 1208 | // CHORD and OPEN behave the same way | ||
| 1209 | if (inarc) { | ||
| 1210 | if (angExt >= 180.0) { | ||
| 1211 | return true; | ||
| 1212 | } | ||
| 1213 | // point must be outside the "pie triangle" | ||
| 1214 | } else { | ||
| 1215 | if (angExt <= 180.0) { | ||
| 1216 | return false; | ||
| 1217 | } | ||
| 1218 | // point must be inside the "pie triangle" | ||
| 1219 | } | ||
| 1220 | // The point is inside the pie triangle iff it is on the same | ||
| 1221 | // side of the line connecting the ends of the arc as the center. | ||
| 1222 | double angle = Math.toRadians(-getAngleStart()); | ||
| 1223 | double x1 = Math.cos(angle); | ||
| 1224 | double y1 = Math.sin(angle); | ||
| 1225 | angle += Math.toRadians(-getAngleExtent()); | ||
| 1226 | double x2 = Math.cos(angle); | ||
| 1227 | double y2 = Math.sin(angle); | ||
| 1228 | boolean inside = (Line2D.relativeCCW(x1, y1, x2, y2, 2*normx, 2*normy) * | ||
| 1229 | Line2D.relativeCCW(x1, y1, x2, y2, 0, 0) >= 0); | ||
| 1230 | return inarc ? !inside : inside; | ||
| 1231 | } | ||
| 1232 | |||
| 1233 | /** | ||
| 1234 | * Determines whether or not the interior of the arc intersects | ||
| 1235 | * the interior of the specified rectangle. | ||
| 1236 | * | ||
| 1237 | * @param x The X coordinate of the rectangle's upper-left corner. | ||
| 1238 | * @param y The Y coordinate of the rectangle's upper-left corner. | ||
| 1239 | * @param w The width of the rectangle. | ||
| 1240 | * @param h The height of the rectangle. | ||
| 1241 | * | ||
| 1242 | * @return <CODE>true</CODE> if the arc intersects the rectangle, | ||
| 1243 | * <CODE>false</CODE> if the arc doesn't intersect the rectangle. | ||
| 1244 | * @since 1.2 | ||
| 1245 | */ | ||
| 1246 | public boolean intersects(double x, double y, double w, double h) { | ||
| 1247 | |||
| 1248 | double aw = getWidth(); | ||
| 1249 | double ah = getHeight(); | ||
| 1250 | |||
| 1251 | if ( w <= 0 || h <= 0 || aw <= 0 || ah <= 0 ) { | ||
| 1252 | return false; | ||
| 1253 | } | ||
| 1254 | double ext = getAngleExtent(); | ||
| 1255 | if (ext == 0) { | ||
| 1256 | return false; | ||
| 1257 | } | ||
| 1258 | |||
| 1259 | double ax = getX(); | ||
| 1260 | double ay = getY(); | ||
| 1261 | double axw = ax + aw; | ||
| 1262 | double ayh = ay + ah; | ||
| 1263 | double xw = x + w; | ||
| 1264 | double yh = y + h; | ||
| 1265 | |||
| 1266 | // check bbox | ||
| 1267 | if (x >= axw || y >= ayh || xw <= ax || yh <= ay) { | ||
| 1268 | return false; | ||
| 1269 | } | ||
| 1270 | |||
| 1271 | // extract necessary data | ||
| 1272 | double axc = getCenterX(); | ||
| 1273 | double ayc = getCenterY(); | ||
| 1274 | Point2D sp = getStartPoint(); | ||
| 1275 | Point2D ep = getEndPoint(); | ||
| 1276 | double sx = sp.getX(); | ||
| 1277 | double sy = sp.getY(); | ||
| 1278 | double ex = ep.getX(); | ||
| 1279 | double ey = ep.getY(); | ||
| 1280 | |||
| 1281 | /* | ||
| 1282 | * Try to catch rectangles that intersect arc in areas | ||
| 1283 | * outside of rectagle with left top corner coordinates | ||
| 1284 | * (min(center x, start point x, end point x), | ||
| 1285 | * min(center y, start point y, end point y)) | ||
| 1286 | * and rigth bottom corner coordinates | ||
| 1287 | * (max(center x, start point x, end point x), | ||
| 1288 | * max(center y, start point y, end point y)). | ||
| 1289 | * So we'll check axis segments outside of rectangle above. | ||
| 1290 | */ | ||
| 1291 | if (ayc >= y && ayc <= yh) { // 0 and 180 | ||
| 1292 | if ((sx < xw && ex < xw && axc < xw && | ||
| 1293 | axw > x && containsAngle(0)) || | ||
| 1294 | (sx > x && ex > x && axc > x && | ||
| 1295 | ax < xw && containsAngle(180))) { | ||
| 1296 | return true; | ||
| 1297 | } | ||
| 1298 | } | ||
| 1299 | if (axc >= x && axc <= xw) { // 90 and 270 | ||
| 1300 | if ((sy > y && ey > y && ayc > y && | ||
| 1301 | ay < yh && containsAngle(90)) || | ||
| 1302 | (sy < yh && ey < yh && ayc < yh && | ||
| 1303 | ayh > y && containsAngle(270))) { | ||
| 1304 | return true; | ||
| 1305 | } | ||
| 1306 | } | ||
| 1307 | |||
| 1308 | /* | ||
| 1309 | * For PIE we should check intersection with pie slices; | ||
| 1310 | * also we should do the same for arcs with extent is greater | ||
| 1311 | * than 180, because we should cover case of rectangle, which | ||
| 1312 | * situated between center of arc and chord, but does not | ||
| 1313 | * intersect the chord. | ||
| 1314 | */ | ||
| 1315 | Rectangle2D rect = new Rectangle2D.Double(x, y, w, h); | ||
| 1316 | if (type == PIE || Math.abs(ext) > 180) { | ||
| 1317 | // for PIE: try to find intersections with pie slices | ||
| 1318 | if (rect.intersectsLine(axc, ayc, sx, sy) || | ||
| 1319 | rect.intersectsLine(axc, ayc, ex, ey)) { | ||
| 1320 | return true; | ||
| 1321 | } | ||
| 1322 | } else { | ||
| 1323 | // for CHORD and OPEN: try to find intersections with chord | ||
| 1324 | if (rect.intersectsLine(sx, sy, ex, ey)) { | ||
| 1325 | return true; | ||
| 1326 | } | ||
| 1327 | } | ||
| 1328 | |||
| 1329 | // finally check the rectangle corners inside the arc | ||
| 1330 | if (contains(x, y) || contains(x + w, y) || | ||
| 1331 | contains(x, y + h) || contains(x + w, y + h)) { | ||
| 1332 | return true; | ||
| 1333 | } | ||
| 1334 | |||
| 1335 | return false; | ||
| 1336 | } | ||
| 1337 | |||
| 1338 | /** | ||
| 1339 | * Determines whether or not the interior of the arc entirely contains | ||
| 1340 | * the specified rectangle. | ||
| 1341 | * | ||
| 1342 | * @param x The X coordinate of the rectangle's upper-left corner. | ||
| 1343 | * @param y The Y coordinate of the rectangle's upper-left corner. | ||
| 1344 | * @param w The width of the rectangle. | ||
| 1345 | * @param h The height of the rectangle. | ||
| 1346 | * | ||
| 1347 | * @return <CODE>true</CODE> if the arc contains the rectangle, | ||
| 1348 | * <CODE>false</CODE> if the arc doesn't contain the rectangle. | ||
| 1349 | * @since 1.2 | ||
| 1350 | */ | ||
| 1351 | public boolean contains(double x, double y, double w, double h) { | ||
| 1352 | return contains(x, y, w, h, null); | ||
| 1353 | } | ||
| 1354 | |||
| 1355 | /** | ||
| 1356 | * Determines whether or not the interior of the arc entirely contains | ||
| 1357 | * the specified rectangle. | ||
| 1358 | * | ||
| 1359 | * @param r The <CODE>Rectangle2D</CODE> to test. | ||
| 1360 | * | ||
| 1361 | * @return <CODE>true</CODE> if the arc contains the rectangle, | ||
| 1362 | * <CODE>false</CODE> if the arc doesn't contain the rectangle. | ||
| 1363 | * @since 1.2 | ||
| 1364 | */ | ||
| 1365 | public boolean contains(Rectangle2D r) { | ||
| 1366 | return contains(r.getX(), r.getY(), r.getWidth(), r.getHeight(), r); | ||
| 1367 | } | ||
| 1368 | |||
| 1369 | private boolean contains(double x, double y, double w, double h, | ||
| 1370 | Rectangle2D origrect) { | ||
| 1371 | if (!(contains(x, y) && | ||
| 1372 | contains(x + w, y) && | ||
| 1373 | contains(x, y + h) && | ||
| 1374 | contains(x + w, y + h))) { | ||
| 1375 | return false; | ||
| 1376 | } | ||
| 1377 | // If the shape is convex then we have done all the testing | ||
| 1378 | // we need. Only PIE arcs can be concave and then only if | ||
| 1379 | // the angular extents are greater than 180 degrees. | ||
| 1380 | if (type != PIE || Math.abs(getAngleExtent()) <= 180.0) { | ||
| 1381 | return true; | ||
| 1382 | } | ||
| 1383 | // For a PIE shape we have an additional test for the case where | ||
| 1384 | // the angular extents are greater than 180 degrees and all four | ||
| 1385 | // rectangular corners are inside the shape but one of the | ||
| 1386 | // rectangle edges spans across the "missing wedge" of the arc. | ||
| 1387 | // We can test for this case by checking if the rectangle intersects | ||
| 1388 | // either of the pie angle segments. | ||
| 1389 | if (origrect == null) { | ||
| 1390 | origrect = new Rectangle2D.Double(x, y, w, h); | ||
| 1391 | } | ||
| 1392 | double halfW = getWidth() / 2.0; | ||
| 1393 | double halfH = getHeight() / 2.0; | ||
| 1394 | double xc = getX() + halfW; | ||
| 1395 | double yc = getY() + halfH; | ||
| 1396 | double angle = Math.toRadians(-getAngleStart()); | ||
| 1397 | double xe = xc + halfW * Math.cos(angle); | ||
| 1398 | double ye = yc + halfH * Math.sin(angle); | ||
| 1399 | if (origrect.intersectsLine(xc, yc, xe, ye)) { | ||
| 1400 | return false; | ||
| 1401 | } | ||
| 1402 | angle += Math.toRadians(-getAngleExtent()); | ||
| 1403 | xe = xc + halfW * Math.cos(angle); | ||
| 1404 | ye = yc + halfH * Math.sin(angle); | ||
| 1405 | return !origrect.intersectsLine(xc, yc, xe, ye); | ||
| 1406 | } | ||
| 1407 | |||
| 1408 | /** | ||
| 1409 | * Returns an iteration object that defines the boundary of the | ||
| 1410 | * arc. | ||
| 1411 | * This iterator is multithread safe. | ||
| 1412 | * <code>Arc2D</code> guarantees that | ||
| 1413 | * modifications to the geometry of the arc | ||
| 1414 | * do not affect any iterations of that geometry that | ||
| 1415 | * are already in process. | ||
| 1416 | * | ||
| 1417 | * @param at an optional <CODE>AffineTransform</CODE> to be applied | ||
| 1418 | * to the coordinates as they are returned in the iteration, or null | ||
| 1419 | * if the untransformed coordinates are desired. | ||
| 1420 | * | ||
| 1421 | * @return A <CODE>PathIterator</CODE> that defines the arc's boundary. | ||
| 1422 | * @since 1.2 | ||
| 1423 | */ | ||
| 1424 | public PathIterator getPathIterator(AffineTransform at) { | ||
| 1425 | return new ArcIterator(this, at); | ||
| 1426 | } | ||
| 1427 | |||
| 1428 | /** | ||
| 1429 | * Returns the hashcode for this <code>Arc2D</code>. | ||
| 1430 | * @return the hashcode for this <code>Arc2D</code>. | ||
| 1431 | * @since 1.6 | ||
| 1432 | */ | ||
| 1433 | public int hashCode() { | ||
| 1434 | long bits = java.lang.Double.doubleToLongBits(getX()); | ||
| 1435 | bits += java.lang.Double.doubleToLongBits(getY()) * 37; | ||
| 1436 | bits += java.lang.Double.doubleToLongBits(getWidth()) * 43; | ||
| 1437 | bits += java.lang.Double.doubleToLongBits(getHeight()) * 47; | ||
| 1438 | bits += java.lang.Double.doubleToLongBits(getAngleStart()) * 53; | ||
| 1439 | bits += java.lang.Double.doubleToLongBits(getAngleExtent()) * 59; | ||
| 1440 | bits += getArcType() * 61; | ||
| 1441 | return (((int) bits) ^ ((int) (bits >> 32))); | ||
| 1442 | } | ||
| 1443 | |||
| 1444 | /** | ||
| 1445 | * Determines whether or not the specified <code>Object</code> is | ||
| 1446 | * equal to this <code>Arc2D</code>. The specified | ||
| 1447 | * <code>Object</code> is equal to this <code>Arc2D</code> | ||
| 1448 | * if it is an instance of <code>Arc2D</code> and if its | ||
| 1449 | * location, size, arc extents and type are the same as this | ||
| 1450 | * <code>Arc2D</code>. | ||
| 1451 | * @param obj an <code>Object</code> to be compared with this | ||
| 1452 | * <code>Arc2D</code>. | ||
| 1453 | * @return <code>true</code> if <code>obj</code> is an instance | ||
| 1454 | * of <code>Arc2D</code> and has the same values; | ||
| 1455 | * <code>false</code> otherwise. | ||
| 1456 | * @since 1.6 | ||
| 1457 | */ | ||
| 1458 | public boolean equals(Object obj) { | ||
| 1459 | if (obj == this) { | ||
| 1460 | return true; | ||
| 1461 | } | ||
| 1462 | if (obj instanceof Arc2D) { | ||
| 1463 | Arc2D a2d = (Arc2D) obj; | ||
| 1464 | return ((getX() == a2d.getX()) && | ||
| 1465 | (getY() == a2d.getY()) && | ||
| 1466 | (getWidth() == a2d.getWidth()) && | ||
| 1467 | (getHeight() == a2d.getHeight()) && | ||
| 1468 | (getAngleStart() == a2d.getAngleStart()) && | ||
| 1469 | (getAngleExtent() == a2d.getAngleExtent()) && | ||
| 1470 | (getArcType() == a2d.getArcType())); | ||
| 1471 | } | ||
| 1472 | return false; | ||
| 1473 | } | ||
| 1474 | } | ||