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Path
author Frank Benoit <benoit@tionex.de>
date Mon, 07 Jan 2008 09:11:15 +0100
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20:55c4568a2bab 21:4f9c0fea3440
1 /*******************************************************************************
2 * Copyright (c) 2000, 2007 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
10 *******************************************************************************/
11 module dwt.graphics.Path;
12
13 import dwt.SWT;
14 import dwt.internal.Compatibility;
15 import dwt.internal.cairo.Cairo;
16 import dwt.internal.gtk.c.cairotypes;
17 import dwt.graphics.Resource;
18 import dwt.graphics.Device;
19 import dwt.graphics.Font;
20 import dwt.graphics.GC;
21 import dwt.graphics.GCData;
22 import dwt.graphics.PathData;
23
24 import tango.stdc.string;
25 import tango.text.convert.Format;
26
27 /**
28 * Instances of this class represent paths through the two-dimensional
29 * coordinate system. Paths do not have to be continuous, and can be
30 * described using lines, rectangles, arcs, cubic or quadratic bezier curves,
31 * glyphs, or other paths.
32 * <p>
33 * Application code must explicitly invoke the <code>Path.dispose()</code>
34 * method to release the operating system resources managed by each instance
35 * when those instances are no longer required.
36 * </p>
37 * <p>
38 * This class requires the operating system's advanced graphics subsystem
39 * which may not be available on some platforms.
40 * </p>
41 *
42 * @since 3.1
43 */
44 public class Path : Resource {
45
46 /**
47 * the OS resource for the Path
48 * (Warning: This field is platform dependent)
49 * <p>
50 * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
51 * public API. It is marked public only so that it can be shared
52 * within the packages provided by SWT. It is not available on all
53 * platforms and should never be accessed from application code.
54 * </p>
55 */
56 public cairo_t* handle;
57
58 bool moved, closed = true;
59
60 /**
61 * Constructs a new empty Path.
62 * <p>
63 * This operation requires the operating system's advanced
64 * graphics subsystem which may not be available on some
65 * platforms.
66 * </p>
67 *
68 * @param device the device on which to allocate the path
69 *
70 * @exception IllegalArgumentException <ul>
71 * <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device</li>
72 * </ul>
73 * @exception SWTException <ul>
74 * <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available</li>
75 * </ul>
76 * @exception SWTError <ul>
77 * <li>ERROR_NO_HANDLES if a handle for the path could not be obtained</li>
78 * </ul>
79 *
80 * @see #dispose()
81 */
82 public this (Device device) {
83 if (device is null) device = Device.getDevice();
84 if (device is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
85 this.device = device;
86 device.checkCairo();
87 auto surface = Cairo.cairo_image_surface_create(cast(cairo_format_t)Cairo.CAIRO_FORMAT_ARGB32, 1, 1);
88 if (surface is null) SWT.error(SWT.ERROR_NO_HANDLES);
89 handle = Cairo.cairo_create(surface);
90 Cairo.cairo_surface_destroy(surface);
91 if (handle is null) SWT.error(SWT.ERROR_NO_HANDLES);
92 if (device.tracking) device.new_Object(this);
93 }
94
95 /**
96 * Adds to the receiver a circular or elliptical arc that lies within
97 * the specified rectangular area.
98 * <p>
99 * The resulting arc begins at <code>startAngle</code> and extends
100 * for <code>arcAngle</code> degrees.
101 * Angles are interpreted such that 0 degrees is at the 3 o'clock
102 * position. A positive value indicates a counter-clockwise rotation
103 * while a negative value indicates a clockwise rotation.
104 * </p><p>
105 * The center of the arc is the center of the rectangle whose origin
106 * is (<code>x</code>, <code>y</code>) and whose size is specified by the
107 * <code>width</code> and <code>height</code> arguments.
108 * </p><p>
109 * The resulting arc covers an area <code>width + 1</code> pixels wide
110 * by <code>height + 1</code> pixels tall.
111 * </p>
112 *
113 * @param x the x coordinate of the upper-left corner of the arc
114 * @param y the y coordinate of the upper-left corner of the arc
115 * @param width the width of the arc
116 * @param height the height of the arc
117 * @param startAngle the beginning angle
118 * @param arcAngle the angular extent of the arc, relative to the start angle
119 *
120 * @exception SWTException <ul>
121 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
122 * </ul>
123 */
124 public void addArc(float x, float y, float width, float height, float startAngle, float arcAngle) {
125 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
126 moved = true;
127 if (width == height) {
128 float angle = -startAngle * cast(float)Compatibility.PI / 180;
129 if (closed) Cairo.cairo_move_to(handle, (x + width / 2f) + width / 2f * Math.cos(angle), (y + height / 2f) + height / 2f * Math.sin(angle));
130 if (arcAngle >= 0) {
131 Cairo.cairo_arc_negative(handle, x + width / 2f, y + height / 2f, width / 2f, angle, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180);
132 } else {
133 Cairo.cairo_arc(handle, x + width / 2f, y + height / 2f, width / 2f, angle, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180);
134 }
135 } else {
136 Cairo.cairo_save(handle);
137 Cairo.cairo_translate(handle, x + width / 2f, y + height / 2f);
138 Cairo.cairo_scale(handle, width / 2f, height / 2f);
139 float angle = -startAngle * cast(float)Compatibility.PI / 180;
140 if (closed) Cairo.cairo_move_to(handle, Math.cos(angle), Math.sin(angle));
141 if (arcAngle >= 0) {
142 Cairo.cairo_arc_negative(handle, 0, 0, 1, angle, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180);
143 } else {
144 Cairo.cairo_arc(handle, 0, 0, 1, angle, -(startAngle + arcAngle) * cast(float)Compatibility.PI / 180);
145 }
146 Cairo.cairo_restore(handle);
147 }
148 closed = false;
149 if (Math.abs(arcAngle) >= 360) close();
150 }
151
152 /**
153 * Adds to the receiver the path described by the parameter.
154 *
155 * @param path the path to add to the receiver
156 *
157 * @exception IllegalArgumentException <ul>
158 * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
159 * <li>ERROR_INVALID_ARGUMENT - if the parameter has been disposed</li>
160 * </ul>
161 * @exception SWTException <ul>
162 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
163 * </ul>
164 */
165 public void addPath(Path path) {
166 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
167 if (path is null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
168 if (path.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
169 moved = false;
170 auto copy = Cairo.cairo_copy_path(path.handle);
171 if (copy is null) SWT.error(SWT.ERROR_NO_HANDLES);
172 Cairo.cairo_append_path(handle, copy);
173 Cairo.cairo_path_destroy(copy);
174 closed = path.closed;
175 }
176
177 /**
178 * Adds to the receiver the rectangle specified by x, y, width and height.
179 *
180 * @param x the x coordinate of the rectangle to add
181 * @param y the y coordinate of the rectangle to add
182 * @param width the width of the rectangle to add
183 * @param height the height of the rectangle to add
184 *
185 * @exception SWTException <ul>
186 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
187 * </ul>
188 */
189 public void addRectangle(float x, float y, float width, float height) {
190 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
191 moved = false;
192 Cairo.cairo_rectangle(handle, x, y, width, height);
193 closed = true;
194 }
195
196 /**
197 * Adds to the receiver the pattern of glyphs generated by drawing
198 * the given string using the given font starting at the point (x, y).
199 *
200 * @param string the text to use
201 * @param x the x coordinate of the starting point
202 * @param y the y coordinate of the starting point
203 * @param font the font to use
204 *
205 * @exception IllegalArgumentException <ul>
206 * <li>ERROR_NULL_ARGUMENT - if the font is null</li>
207 * <li>ERROR_INVALID_ARGUMENT - if the font has been disposed</li>
208 * </ul>
209 * @exception SWTException <ul>
210 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
211 * </ul>
212 */
213 public void addString(char[] str, float x, float y, Font font) {
214 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
215 if (font == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
216 if (font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
217 moved = false;
218 GC.addCairoString(handle, str, x, y, font);
219 closed = true;
220 }
221
222 /**
223 * Closes the current sub path by adding to the receiver a line
224 * from the current point of the path back to the starting point
225 * of the sub path.
226 *
227 * @exception SWTException <ul>
228 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
229 * </ul>
230 */
231 public void close() {
232 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
233 Cairo.cairo_close_path(handle);
234 moved = false;
235 closed = true;
236 }
237
238 /**
239 * Returns <code>true</code> if the specified point is contained by
240 * the receiver and false otherwise.
241 * <p>
242 * If outline is <code>true</code>, the point (x, y) checked for containment in
243 * the receiver's outline. If outline is <code>false</code>, the point is
244 * checked to see if it is contained within the bounds of the (closed) area
245 * covered by the receiver.
246 *
247 * @param x the x coordinate of the point to test for containment
248 * @param y the y coordinate of the point to test for containment
249 * @param gc the GC to use when testing for containment
250 * @param outline controls whether to check the outline or contained area of the path
251 * @return <code>true</code> if the path contains the point and <code>false</code> otherwise
252 *
253 * @exception IllegalArgumentException <ul>
254 * <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
255 * <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</li>
256 * </ul>
257 * @exception SWTException <ul>
258 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
259 * </ul>
260 */
261 public bool contains(float x, float y, GC gc, bool outline) {
262 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
263 if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
264 if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
265 //TODO - see Windows
266 gc.initCairo();
267 gc.checkGC(GC.LINE_CAP | GC.LINE_JOIN | GC.LINE_STYLE | GC.LINE_WIDTH);
268 bool result = false;
269 auto cairo = gc.data.cairo;
270 auto copy = Cairo.cairo_copy_path(handle);
271 if (copy is null) SWT.error(SWT.ERROR_NO_HANDLES);
272 Cairo.cairo_append_path(cairo, copy);
273 Cairo.cairo_path_destroy(copy);
274 if (outline) {
275 result = Cairo.cairo_in_stroke(cairo, x, y) != 0;
276 } else {
277 result = Cairo.cairo_in_fill(cairo, x, y) != 0;
278 }
279 Cairo.cairo_new_path(cairo);
280 return result;
281 }
282
283 /**
284 * Adds to the receiver a cubic bezier curve based on the parameters.
285 *
286 * @param cx1 the x coordinate of the first control point of the spline
287 * @param cy1 the y coordinate of the first control of the spline
288 * @param cx2 the x coordinate of the second control of the spline
289 * @param cy2 the y coordinate of the second control of the spline
290 * @param x the x coordinate of the end point of the spline
291 * @param y the y coordinate of the end point of the spline
292 *
293 * @exception SWTException <ul>
294 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
295 * </ul>
296 */
297 public void cubicTo(float cx1, float cy1, float cx2, float cy2, float x, float y) {
298 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
299 if (!moved) {
300 double currentX, currentY;
301 Cairo.cairo_get_current_point(handle, &currentX, &currentY);
302 Cairo.cairo_move_to(handle, currentX, currentY);
303 moved = true;
304 }
305 Cairo.cairo_curve_to(handle, cx1, cy1, cx2, cy2, x, y);
306 closed = false;
307 }
308
309 /**
310 * Replaces the first four elements in the parameter with values that
311 * describe the smallest rectangle that will completely contain the
312 * receiver (i.e. the bounding box).
313 *
314 * @param bounds the array to hold the result
315 *
316 * @exception IllegalArgumentException <ul>
317 * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
318 * <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the bounding box</li>
319 * </ul>
320 * @exception SWTException <ul>
321 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
322 * </ul>
323 */
324 public void getBounds(float[] bounds) {
325 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
326 if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
327 if (bounds.length < 4) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
328 auto copy = Cairo.cairo_copy_path(handle);
329 if (copy is null) SWT.error(SWT.ERROR_NO_HANDLES);
330 cairo_path_t* path = new cairo_path_t();
331 memmove(path, copy, cairo_path_t.sizeof);
332 double minX = 0, minY = 0, maxX = 0, maxY = 0;
333 if (path.num_data > 0) {
334 minX = minY = double.max;
335 maxX = maxY = -double.max;
336 int i = 0;
337 cairo_path_data_t* data = new cairo_path_data_t();
338 while (i < path.num_data) {
339 *data = path.data[i];
340 switch (data.type) {
341 case Cairo.CAIRO_PATH_MOVE_TO:
342 minX = Math.min(minX, path.data[i+1].x);
343 minY = Math.min(minY, path.data[i+1].y);
344 maxX = Math.max(maxX, path.data[i+1].x);
345 maxY = Math.max(maxY, path.data[i+1].y);
346 break;
347 case Cairo.CAIRO_PATH_LINE_TO:
348 minX = Math.min(minX, path.data[i+1].x);
349 minY = Math.min(minY, path.data[i+1].y);
350 maxX = Math.max(maxX, path.data[i+1].x);
351 maxY = Math.max(maxY, path.data[i+1].y);
352 break;
353 case Cairo.CAIRO_PATH_CURVE_TO:
354 minX = Math.min(minX, path.data[i+1].x);
355 minY = Math.min(minY, path.data[i+1].y);
356 maxX = Math.max(maxX, path.data[i+1].x);
357 maxY = Math.max(maxY, path.data[i+1].y);
358 minX = Math.min(minX, path.data[i+2].x);
359 minY = Math.min(minY, path.data[i+2].y);
360 maxX = Math.max(maxX, path.data[i+2].x);
361 maxY = Math.max(maxY, path.data[i+2].y);
362 minX = Math.min(minX, path.data[i+3].x);
363 minY = Math.min(minY, path.data[i+3].y);
364 maxX = Math.max(maxX, path.data[i+3].x);
365 maxY = Math.max(maxY, path.data[i+3].y);
366 break;
367 case Cairo.CAIRO_PATH_CLOSE_PATH: break;
368 }
369 i += data.length;
370 }
371 }
372 bounds[0] = cast(float)minX;
373 bounds[1] = cast(float)minY;
374 bounds[2] = cast(float)(maxX - minX);
375 bounds[3] = cast(float)(maxY - minY);
376 Cairo.cairo_path_destroy(copy);
377 }
378
379 /**
380 * Replaces the first two elements in the parameter with values that
381 * describe the current point of the path.
382 *
383 * @param point the array to hold the result
384 *
385 * @exception IllegalArgumentException <ul>
386 * <li>ERROR_NULL_ARGUMENT - if the parameter is null</li>
387 * <li>ERROR_INVALID_ARGUMENT - if the parameter is too small to hold the end point</li>
388 * </ul>
389 * @exception SWTException <ul>
390 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
391 * </ul>
392 */
393 public void getCurrentPoint(float[] point) {
394 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
395 if (point == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
396 if (point.length < 2) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
397 double x, y;
398 Cairo.cairo_get_current_point(handle, &x, &y);
399 point[0] = cast(float)x;
400 point[1] = cast(float)y;
401 }
402
403 /**
404 * Returns a device independent representation of the receiver.
405 *
406 * @return the PathData for the receiver
407 *
408 * @exception SWTException <ul>
409 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
410 * </ul>
411 *
412 * @see PathData
413 */
414 public PathData getPathData() {
415 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
416 auto copy = Cairo.cairo_copy_path(handle);
417 if (copy is null) SWT.error(SWT.ERROR_NO_HANDLES);
418 cairo_path_t* path = new cairo_path_t();
419 *path = *copy;
420 byte[] types = new byte[path.num_data];
421 float[] pts = new float[path.num_data * 6];
422 int typeIndex = 0, ptsIndex = 0;
423 if (path.num_data > 0) {
424 int i = 0;
425 double[] points = new double[6];
426 cairo_path_data_t* data = new cairo_path_data_t();
427 while (i < path.num_data) {
428 switch (data.type) {
429 case Cairo.CAIRO_PATH_MOVE_TO:
430 types[typeIndex++] = SWT.PATH_MOVE_TO;
431 pts[ptsIndex++] = cast(float)path.data[i+1].x;
432 pts[ptsIndex++] = cast(float)path.data[i+1].y;
433 break;
434 case Cairo.CAIRO_PATH_LINE_TO:
435 types[typeIndex++] = SWT.PATH_LINE_TO;
436 pts[ptsIndex++] = cast(float)path.data[i+1].x;
437 pts[ptsIndex++] = cast(float)path.data[i+1].y;
438 break;
439 case Cairo.CAIRO_PATH_CURVE_TO:
440 types[typeIndex++] = SWT.PATH_CUBIC_TO;
441 pts[ptsIndex++] = cast(float)path.data[i+1].x;
442 pts[ptsIndex++] = cast(float)path.data[i+1].y;
443 pts[ptsIndex++] = cast(float)path.data[i+2].x;
444 pts[ptsIndex++] = cast(float)path.data[i+2].y;
445 pts[ptsIndex++] = cast(float)path.data[i+3].x;
446 pts[ptsIndex++] = cast(float)path.data[i+3].y;
447 break;
448 case Cairo.CAIRO_PATH_CLOSE_PATH:
449 types[typeIndex++] = SWT.PATH_CLOSE;
450 break;
451 }
452 i += data.length;
453 }
454 }
455 if (typeIndex != types.length) {
456 types.length = typeIndex;
457 }
458 if (ptsIndex != pts.length) {
459 pts.length = ptsIndex;
460 }
461 Cairo.cairo_path_destroy(copy);
462 PathData result = new PathData();
463 result.types = types;
464 result.points = pts;
465 return result;
466 }
467
468 /**
469 * Adds to the receiver a line from the current point to
470 * the point specified by (x, y).
471 *
472 * @param x the x coordinate of the end of the line to add
473 * @param y the y coordinate of the end of the line to add
474 *
475 * @exception SWTException <ul>
476 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
477 * </ul>
478 */
479 public void lineTo(float x, float y) {
480 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
481 if (!moved) {
482 double currentX, currentY;
483 Cairo.cairo_get_current_point(handle, &currentX, &currentY);
484 Cairo.cairo_move_to(handle, currentX, currentY);
485 moved = true;
486 }
487 Cairo.cairo_line_to(handle, x, y);
488 closed = false;
489 }
490
491 /**
492 * Sets the current point of the receiver to the point
493 * specified by (x, y). Note that this starts a new
494 * sub path.
495 *
496 * @param x the x coordinate of the new end point
497 * @param y the y coordinate of the new end point
498 *
499 * @exception SWTException <ul>
500 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
501 * </ul>
502 */
503 public void moveTo(float x, float y) {
504 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
505 /*
506 * Bug in Cairo. If cairo_move_to() is not called at the
507 * begining of a subpath, the first cairo_line_to() or
508 * cairo_curve_to() segment do not output anything. The fix
509 * is to detect that the app did not call cairo_move_to()
510 * before those calls and call it explicitly.
511 */
512 moved = true;
513 Cairo.cairo_move_to(handle, x, y);
514 closed = true;
515 }
516
517 /**
518 * Adds to the receiver a quadratic curve based on the parameters.
519 *
520 * @param cx the x coordinate of the control point of the spline
521 * @param cy the y coordinate of the control point of the spline
522 * @param x the x coordinate of the end point of the spline
523 * @param y the y coordinate of the end point of the spline
524 *
525 * @exception SWTException <ul>
526 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
527 * </ul>
528 */
529 public void quadTo(float cx, float cy, float x, float y) {
530 if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
531 double currentX, currentY;
532 Cairo.cairo_get_current_point(handle, &currentX, &currentY);
533 if (!moved) {
534 Cairo.cairo_move_to(handle, currentX, currentY);
535 moved = true;
536 }
537 float x0 = cast(float)currentX;
538 float y0 = cast(float)currentY;
539 float cx1 = x0 + 2 * (cx - x0) / 3;
540 float cy1 = y0 + 2 * (cy - y0) / 3;
541 float cx2 = cx1 + (x - x0) / 3;
542 float cy2 = cy1 + (y - y0) / 3;
543 Cairo.cairo_curve_to(handle, cx1, cy1, cx2, cy2, x, y);
544 closed = false;
545 }
546
547 /**
548 * Disposes of the operating system resources associated with
549 * the Path. Applications must dispose of all Paths that
550 * they allocate.
551 */
552 public void dispose() {
553 if (handle is null) return;
554 Cairo.cairo_destroy(handle);
555 handle = null;
556 if (device.tracking) device.dispose_Object(this);
557 device = null;
558 }
559
560 /**
561 * Returns <code>true</code> if the Path has been disposed,
562 * and <code>false</code> otherwise.
563 * <p>
564 * This method gets the dispose state for the Path.
565 * When a Path has been disposed, it is an error to
566 * invoke any other method using the Path.
567 *
568 * @return <code>true</code> when the Path is disposed, and <code>false</code> otherwise
569 */
570 public bool isDisposed() {
571 return handle is null;
572 }
573
574 /**
575 * Returns a string containing a concise, human-readable
576 * description of the receiver.
577 *
578 * @return a string representation of the receiver
579 */
580 public char[] toString() {
581 if (isDisposed()) return "Path {*DISPOSED*}";
582 return Format( "Path {{{}}", handle );
583 }
584
585 }