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author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sat, 09 Aug 2008 17:00:02 +0200
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1 /*******************************************************************************
2 * Copyright (c) 2000, 2006 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.widgets.CoolBar;
12
13 import dwt.dwthelper.utils;
14
15
16 import dwt.DWT;
17 import dwt.DWTException;
18 import dwt.graphics.Color;
19 import dwt.graphics.Cursor;
20 import dwt.graphics.GC;
21 import dwt.graphics.Point;
22 import dwt.graphics.Rectangle;
23
24 /**
25 * Instances of this class provide an area for dynamically
26 * positioning the items they contain.
27 * <p>
28 * The item children that may be added to instances of this class
29 * must be of type <code>CoolItem</code>.
30 * </p><p>
31 * Note that although this class is a subclass of <code>Composite</code>,
32 * it does not make sense to add <code>Control</code> children to it,
33 * or set a layout on it.
34 * </p><p>
35 * <dl>
36 * <dt><b>Styles:</b></dt>
37 * <dd>FLAT, HORIZONTAL, VERTICAL</dd>
38 * <dt><b>Events:</b></dt>
39 * <dd>(none)</dd>
40 * </dl>
41 * </p><p>
42 * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.
43 * </p><p>
44 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
45 * </p>
46 */
47 public class CoolBar extends Composite {
48 CoolItem[][] items = new CoolItem[0][0];
49 CoolItem[] originalItems = new CoolItem[0];
50 Cursor hoverCursor, dragCursor, cursor;
51 CoolItem dragging = null;
52 int mouseXOffset, itemXOffset;
53 bool isLocked = false;
54 bool inDispose = false;
55 static final int ROW_SPACING = 2;
56 static final int CLICK_DISTANCE = 3;
57 static final int DEFAULT_COOLBAR_WIDTH = 0;
58 static final int DEFAULT_COOLBAR_HEIGHT = 0;
59
60 /**
61 * Constructs a new instance of this class given its parent
62 * and a style value describing its behavior and appearance.
63 * <p>
64 * The style value is either one of the style constants defined in
65 * class <code>DWT</code> which is applicable to instances of this
66 * class, or must be built by <em>bitwise OR</em>'ing together
67 * (that is, using the <code>int</code> "|" operator) two or more
68 * of those <code>DWT</code> style constants. The class description
69 * lists the style constants that are applicable to the class.
70 * Style bits are also inherited from superclasses.
71 * </p>
72 *
73 * @param parent a composite control which will be the parent of the new instance (cannot be null)
74 * @param style the style of control to construct
75 *
76 * @exception IllegalArgumentException <ul>
77 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
78 * </ul>
79 * @exception DWTException <ul>
80 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
81 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
82 * </ul>
83 *
84 * @see DWT
85 * @see Widget#checkSubclass
86 * @see Widget#getStyle
87 */
88 public CoolBar (Composite parent, int style) {
89 super (parent, checkStyle(style));
90 if ((style & DWT.VERTICAL) !is 0) {
91 this.style |= DWT.VERTICAL;
92 hoverCursor = new Cursor(display, DWT.CURSOR_SIZENS);
93 } else {
94 this.style |= DWT.HORIZONTAL;
95 hoverCursor = new Cursor(display, DWT.CURSOR_SIZEWE);
96 }
97 dragCursor = new Cursor(display, DWT.CURSOR_SIZEALL);
98 Listener listener = new Listener() {
99 public void handleEvent(Event event) {
100 switch (event.type) {
101 case DWT.Dispose: onDispose(event); break;
102 case DWT.MouseDown: onMouseDown(event); break;
103 case DWT.MouseExit: onMouseExit(); break;
104 case DWT.MouseMove: onMouseMove(event); break;
105 case DWT.MouseUp: onMouseUp(event); break;
106 case DWT.MouseDoubleClick: onMouseDoubleClick(event); break;
107 case DWT.Paint: onPaint(event); break;
108 case DWT.Resize: onResize(); break;
109 }
110 }
111 };
112 int[] events = new int[] {
113 DWT.Dispose,
114 DWT.MouseDown,
115 DWT.MouseExit,
116 DWT.MouseMove,
117 DWT.MouseUp,
118 DWT.MouseDoubleClick,
119 DWT.Paint,
120 DWT.Resize
121 };
122 for (int i = 0; i < events.length; i++) {
123 addListener(events[i], listener);
124 }
125 }
126 static int checkStyle (int style) {
127 style |= DWT.NO_FOCUS;
128 return (style | DWT.NO_REDRAW_RESIZE) & ~(DWT.V_SCROLL | DWT.H_SCROLL);
129 }
130 void _setCursor (Cursor cursor) {
131 if (this.cursor !is null) return;
132 super.setCursor (cursor);
133 }
134 protected void checkSubclass () {
135 if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
136 }
137 public Point computeSize (int wHint, int hHint, bool changed) {
138 checkWidget();
139 int width = 0, height = 0;
140 wrapItems((style & DWT.VERTICAL) !is 0 ? hHint : wHint);
141 bool flat = (style & DWT.FLAT) !is 0;
142 for (int row = 0; row < items.length; row++) {
143 int rowWidth = 0, rowHeight = 0;
144 for (int i = 0; i < items[row].length; i++) {
145 CoolItem item = items[row][i];
146 rowWidth += item.preferredWidth;
147 rowHeight = Math.max(rowHeight, item.preferredHeight);
148 }
149 height += rowHeight;
150 if (!flat && row > 0) height += ROW_SPACING;
151 width = Math.max(width, rowWidth);
152 }
153 wrapItems(getWidth());
154 if (width is 0) width = DEFAULT_COOLBAR_WIDTH;
155 if (height is 0) height = DEFAULT_COOLBAR_HEIGHT;
156 if (wHint !is DWT.DEFAULT) width = wHint;
157 if (hHint !is DWT.DEFAULT) height = hHint;
158 Rectangle trim = computeTrim(0, 0, width, height);
159 return fixPoint(trim.width, trim.height);
160 }
161 CoolItem getGrabbedItem(int x, int y) {
162 for (int row = 0; row < items.length; row++) {
163 for (int i = 0; i < items[row].length; i++) {
164 CoolItem item = items[row][i];
165 Rectangle bounds = item.internalGetBounds();
166 bounds.width = CoolItem.MINIMUM_WIDTH;
167 if (bounds.x > x) break;
168 if (bounds.y > y) return null;
169 if (bounds.contains(x, y)) {
170 return item;
171 }
172 }
173 }
174 return null;
175 }
176 /**
177 * Returns the item that is currently displayed at the given,
178 * zero-relative index. Throws an exception if the index is
179 * out of range.
180 *
181 * @param index the visual index of the item to return
182 * @return the item at the given visual index
183 *
184 * @exception IllegalArgumentException <ul>
185 * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li>
186 * </ul>
187 * @exception DWTException <ul>
188 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
189 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
190 * </ul>
191 */
192 public CoolItem getItem (int index) {
193 checkWidget();
194 if (index < 0) error (DWT.ERROR_INVALID_RANGE);
195 for (int row = 0; row < items.length; row++) {
196 if (items[row].length > index) {
197 return items[row][index];
198 } else {
199 index -= items[row].length;
200 }
201 }
202 error (DWT.ERROR_INVALID_RANGE);
203 return null;
204 }
205 /**
206 * Returns the number of items contained in the receiver.
207 *
208 * @return the number of items
209 *
210 * @exception DWTException <ul>
211 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
212 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
213 * </ul>
214 */
215 public int getItemCount () {
216 checkWidget();
217 return originalItems.length;
218 }
219 /**
220 * Returns an array of <code>CoolItem</code>s in the order
221 * in which they are currently being displayed.
222 * <p>
223 * Note: This is not the actual structure used by the receiver
224 * to maintain its list of items, so modifying the array will
225 * not affect the receiver.
226 * </p>
227 *
228 * @return the receiver's items in their current visual order
229 *
230 * @exception DWTException <ul>
231 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
232 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
233 * </ul>
234 */
235 public CoolItem [] getItems () {
236 checkWidget();
237 CoolItem [] result = new CoolItem [getItemCount()];
238 int offset = 0;
239 for (int row = 0; row < items.length; row++) {
240 System.arraycopy(items[row], 0, result, offset, items[row].length);
241 offset += items[row].length;
242 }
243 return result;
244 }
245 Point findItem (CoolItem item) {
246 for (int row = 0; row < items.length; row++) {
247 for (int i = 0; i < items[row].length; i++) {
248 if (items[row][i].equals(item)) return new Point(i, row);
249 }
250 }
251 return new Point(-1, -1);
252 }
253 void fixEvent (Event event) {
254 if ((style & DWT.VERTICAL) !is 0) {
255 int tmp = event.x;
256 event.x = event.y;
257 event.y = tmp;
258 }
259 }
260 Rectangle fixRectangle (int x, int y, int width, int height) {
261 if ((style & DWT.VERTICAL) !is 0) {
262 return new Rectangle(y, x, height, width);
263 }
264 return new Rectangle(x, y, width, height);
265 }
266 Point fixPoint (int x, int y) {
267 if ((style & DWT.VERTICAL) !is 0) {
268 return new Point(y, x);
269 }
270 return new Point(x, y);
271 }
272 /**
273 * Searches the receiver's items in the order they are currently
274 * being displayed, starting at the first item (index 0), until
275 * an item is found that is equal to the argument, and returns
276 * the index of that item. If no item is found, returns -1.
277 *
278 * @param item the search item
279 * @return the visual order index of the search item, or -1 if the item is not found
280 *
281 * @exception IllegalArgumentException <ul>
282 * <li>ERROR_NULL_ARGUMENT - if the item is null</li>
283 * <li>ERROR_INVALID_ARGUMENT - if the item is disposed</li>
284 * </ul>
285 * @exception DWTException <ul>
286 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
287 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
288 * </ul>
289 */
290 public int indexOf (CoolItem item) {
291 checkWidget();
292 if (item is null) error (DWT.ERROR_NULL_ARGUMENT);
293 if (item.isDisposed()) error (DWT.ERROR_INVALID_ARGUMENT);
294 int answer = 0;
295 for (int row = 0; row < items.length; row++) {
296 for (int i = 0; i < items[row].length; i++) {
297 if (items[row][i].equals(item)) {
298 return answer;
299 } else {
300 answer++;
301 }
302 }
303 }
304 return -1;
305 }
306 /**
307 * Insert the item into the row. Adjust the x and width values
308 * appropriately.
309 */
310 void insertItemIntoRow(CoolItem item, int rowIndex, int x_root) {
311 int barWidth = getWidth();
312 int rowY = items[rowIndex][0].internalGetBounds().y;
313 int x = Math.max(0, Math.abs(x_root - toDisplay(new Point(0, 0)).x));
314
315 /* Find the insertion index and add the item. */
316 int index;
317 for (index = 0; index < items[rowIndex].length; index++) {
318 if (x < items[rowIndex][index].internalGetBounds().x) break;
319 }
320 if (index is 0) {
321 item.wrap = true;
322 items[rowIndex][0].wrap = false;
323 }
324 int oldLength = items[rowIndex].length;
325 CoolItem[] newRow = new CoolItem[oldLength + 1];
326 System.arraycopy(items[rowIndex], 0, newRow, 0, index);
327 newRow[index] = item;
328 System.arraycopy(items[rowIndex], index, newRow, index + 1, oldLength - index);
329 items[rowIndex] = newRow;
330
331 /* Adjust the width of the item to the left. */
332 if (index > 0) {
333 CoolItem left = items[rowIndex][index - 1];
334 Rectangle leftBounds = left.internalGetBounds();
335 int newWidth = x - leftBounds.x;
336 if (newWidth < left.internalGetMinimumWidth()) {
337 x += left.internalGetMinimumWidth() - newWidth;
338 newWidth = left.internalGetMinimumWidth();
339 }
340 left.setBounds(leftBounds.x, leftBounds.y, newWidth, leftBounds.height);
341 left.requestedWidth = newWidth;
342 }
343
344 /* Set the item's bounds. */
345 int width = 0, height = item.internalGetBounds().height;
346 if (index < items[rowIndex].length - 1) {
347 CoolItem right = items[rowIndex][index + 1];
348 width = right.internalGetBounds().x - x;
349 if (width < right.internalGetMinimumWidth()) {
350 moveRight(right, right.internalGetMinimumWidth() - width);
351 width = right.internalGetBounds().x - x;
352 }
353 item.setBounds(x, rowY, width, height);
354 if (width < item.internalGetMinimumWidth()) moveLeft(item, item.internalGetMinimumWidth() - width);
355 } else {
356 width = Math.max(item.internalGetMinimumWidth(), barWidth - x);
357 item.setBounds(x, rowY, width, height);
358 if (x + width > barWidth) moveLeft(item, x + width - barWidth);
359 }
360 Rectangle bounds = item.internalGetBounds();
361 item.requestedWidth = bounds.width;
362 internalRedraw(bounds.x, bounds.y, item.internalGetMinimumWidth(), bounds.height);
363 }
364 void internalRedraw (int x, int y, int width, int height) {
365 if ((style & DWT.VERTICAL) !is 0) {
366 redraw (y, x, height, width, false);
367 } else {
368 redraw (x, y, width, height, false);
369 }
370 }
371 void createItem (CoolItem item, int index) {
372 int itemCount = getItemCount(), row = 0;
373 if (!(0 <= index && index <= itemCount)) error (DWT.ERROR_INVALID_RANGE);
374 if (items.length is 0) {
375 items = new CoolItem[1][1];
376 items[0][0] = item;
377 } else {
378 int i = index;
379 /* find the row to insert into */
380 if (index < itemCount) {
381 while (i > items[row].length) {
382 i -= items[row].length;
383 row++;
384 }
385 } else {
386 row = items.length - 1;
387 i = items[row].length;
388 }
389
390 // Set the last item in the row to the preferred size
391 // and add the new one just to it's right
392 int lastIndex = items[row].length - 1;
393 CoolItem lastItem = items[row][lastIndex];
394 if (lastItem.ideal) {
395 Rectangle bounds = lastItem.internalGetBounds();
396 bounds.width = lastItem.preferredWidth;
397 bounds.height = lastItem.preferredHeight;
398 lastItem.requestedWidth = lastItem.preferredWidth;
399 lastItem.setBounds(bounds.x, bounds.y, bounds.width, bounds.height);
400 }
401 if (i is 0) {
402 item.wrap = true;
403 items[row][0].wrap = false;
404 }
405 int oldLength = items[row].length;
406 CoolItem[] newRow = new CoolItem[oldLength + 1];
407 System.arraycopy(items[row], 0, newRow, 0, i);
408 newRow[i] = item;
409 System.arraycopy(items[row], i, newRow, i + 1, oldLength - i);
410 items[row] = newRow;
411 }
412 item.requestedWidth = CoolItem.MINIMUM_WIDTH;
413
414 int length = originalItems.length;
415 CoolItem [] newOriginals = new CoolItem [length + 1];
416 System.arraycopy (originalItems, 0, newOriginals, 0, index);
417 System.arraycopy (originalItems, index, newOriginals, index + 1, length - index);
418 newOriginals [index] = item;
419 originalItems = newOriginals;
420 layoutItems();
421
422 }
423 void destroyItem(CoolItem item) {
424 if (inDispose) return;
425 int row = findItem(item).y;
426 if (row is -1) return;
427 Rectangle bounds = item.internalGetBounds();
428 removeItemFromRow(item, row, true);
429
430 int index = 0;
431 while (index < originalItems.length) {
432 if (originalItems [index] is item) break;
433 index++;
434 }
435 int length = originalItems.length - 1;
436 CoolItem [] newOriginals = new CoolItem [length];
437 System.arraycopy (originalItems, 0, newOriginals, 0, index);
438 System.arraycopy (originalItems, index + 1, newOriginals, index, length - index);
439 originalItems = newOriginals;
440
441 internalRedraw(bounds.x, bounds.y, CoolItem.MINIMUM_WIDTH, bounds.height);
442 relayout();
443 }
444 void moveDown(CoolItem item, int x_root) {
445 int oldRowIndex = findItem(item).y;
446 bool resize = false;
447 if (items[oldRowIndex].length is 1) {
448 resize = true;
449 /* If this is the only item in the bottom row, don't move it. */
450 if (oldRowIndex is items.length - 1) return;
451 }
452 int newRowIndex = (items[oldRowIndex].length is 1) ? oldRowIndex : oldRowIndex + 1;
453 removeItemFromRow(item, oldRowIndex, false);
454 Rectangle old = item.internalGetBounds();
455 internalRedraw(old.x, old.y, CoolItem.MINIMUM_WIDTH, old.height);
456 if (newRowIndex is items.length) {
457 /* Create a new bottom row for the item. */
458 CoolItem[][] newRows = new CoolItem[items.length + 1][];
459 System.arraycopy(items, 0, newRows, 0, items.length);
460 int row = items.length;
461 newRows[row] = new CoolItem[1];
462 newRows[row][0] = item;
463 items = newRows;
464 resize = true;
465 item.wrap = true;
466 } else {
467 insertItemIntoRow(item, newRowIndex, x_root);
468 }
469 if (resize) {
470 relayout();
471 } else {
472 layoutItems();
473 }
474 }
475 void moveLeft(CoolItem item, int pixels) {
476 Point point = findItem(item);
477 int row = point.y;
478 int index = point.x;
479 if (index is 0) return;
480 Rectangle bounds = item.internalGetBounds();
481 int minSpaceOnLeft = 0;
482 for (int i = 0; i < index; i++) {
483 minSpaceOnLeft += items[row][i].internalGetMinimumWidth();
484 }
485 int x = Math.max(minSpaceOnLeft, bounds.x - pixels);
486 CoolItem left = items[row][index - 1];
487 Rectangle leftBounds = left.internalGetBounds();
488 if (leftBounds.x + left.internalGetMinimumWidth() > x) {
489 int shift = leftBounds.x + left.internalGetMinimumWidth() - x;
490 moveLeft(left, shift);
491 leftBounds = left.internalGetBounds();
492 }
493 int leftWidth = Math.max(left.internalGetMinimumWidth(), leftBounds.width - pixels);
494 left.setBounds(leftBounds.x, leftBounds.y, leftWidth, leftBounds.height);
495 left.requestedWidth = leftWidth;
496 int width = bounds.width + (bounds.x - x);
497 item.setBounds(x, bounds.y, width, bounds.height);
498 item.requestedWidth = width;
499
500 int damagedWidth = bounds.x - x + CoolItem.MINIMUM_WIDTH;
501 if (damagedWidth > CoolItem.MINIMUM_WIDTH) {
502 internalRedraw(x, bounds.y, damagedWidth, bounds.height);
503 }
504 }
505 void moveRight(CoolItem item, int pixels) {
506 Point point = findItem(item);
507 int row = point.y;
508 int index = point.x;
509 if (index is 0) return;
510 Rectangle bounds = item.internalGetBounds();
511 int minSpaceOnRight = 0;
512 for (int i = index; i < items[row].length; i++) {
513 minSpaceOnRight += items[row][i].internalGetMinimumWidth();
514 }
515 int max = getWidth() - minSpaceOnRight;
516 int x = Math.min(max, bounds.x + pixels);
517 int width = 0;
518 if (index + 1 is items[row].length) {
519 width = getWidth() - x;
520 } else {
521 CoolItem right = items[row][index + 1];
522 Rectangle rightBounds = right.internalGetBounds();
523 if (x + item.internalGetMinimumWidth() > rightBounds.x) {
524 int shift = x + item.internalGetMinimumWidth() - rightBounds.x;
525 moveRight(right, shift);
526 rightBounds = right.internalGetBounds();
527 }
528 width = rightBounds.x - x;
529 }
530 item.setBounds(x, bounds.y, width, bounds.height);
531 item.requestedWidth = width;
532 CoolItem left = items[row][index - 1];
533 Rectangle leftBounds = left.internalGetBounds();
534 int leftWidth = x - leftBounds.x;
535 left.setBounds(leftBounds.x, leftBounds.y, leftWidth, leftBounds.height);
536 left.requestedWidth = leftWidth;
537
538 int damagedWidth = x - bounds.x + CoolItem.MINIMUM_WIDTH + CoolItem.MARGIN_WIDTH;
539 if (x - bounds.x > 0) {
540 internalRedraw(bounds.x - CoolItem.MARGIN_WIDTH, bounds.y, damagedWidth, bounds.height);
541 }
542 }
543 void moveUp(CoolItem item, int x_root) {
544 Point point = findItem(item);
545 int oldRowIndex = point.y;
546 bool resize = false;
547 if (items[oldRowIndex].length is 1) {
548 resize = true;
549 /* If this is the only item in the top row, don't move it. */
550 if (oldRowIndex is 0) return;
551 }
552 removeItemFromRow(item, oldRowIndex, false);
553 Rectangle old = item.internalGetBounds();
554 internalRedraw(old.x, old.y, CoolItem.MINIMUM_WIDTH, old.height);
555 int newRowIndex = Math.max(0, oldRowIndex - 1);
556 if (oldRowIndex is 0) {
557 /* Create a new top row for the item. */
558 CoolItem[][] newRows = new CoolItem[items.length + 1][];
559 System.arraycopy(items, 0, newRows, 1, items.length);
560 newRows[0] = new CoolItem[1];
561 newRows[0][0] = item;
562 items = newRows;
563 resize = true;
564 item.wrap = true;
565 } else {
566 insertItemIntoRow(item, newRowIndex, x_root);
567 }
568 if (resize) {
569 relayout();
570 } else {
571 layoutItems();
572 }
573 }
574 void onDispose(Event event) {
575 /*
576 * Usually when an item is disposed, destroyItem will change the size of the items array
577 * and reset the bounds of all the remaining cool items.
578 * Since the whole cool bar is being disposed, this is not necessary. For speed
579 * the inDispose flag is used to skip over this part of the item dispose.
580 */
581 if (inDispose) return;
582 inDispose = true;
583 notifyListeners(DWT.Dispose, event);
584 event.type = DWT.None;
585 for (int i = 0; i < items.length; i++) {
586 for (int j = 0; j < items[i].length; j++) {
587 items[i][j].dispose();
588 }
589 }
590 hoverCursor.dispose();
591 dragCursor.dispose();
592 cursor = null;
593 }
594 void onMouseDown(Event event) {
595 if (isLocked || event.button !is 1) return;
596 fixEvent(event);
597 dragging = getGrabbedItem(event.x, event.y);
598 if (dragging !is null) {
599 mouseXOffset = event.x;
600 itemXOffset = mouseXOffset - dragging.internalGetBounds().x;
601 _setCursor(dragCursor);
602 }
603 fixEvent(event);
604 }
605 void onMouseExit() {
606 if (dragging is null) _setCursor(null);
607 }
608 void onMouseMove(Event event) {
609 if (isLocked) return;
610 fixEvent(event);
611 CoolItem grabbed = getGrabbedItem(event.x, event.y);
612 if (dragging !is null) {
613 int left_root = toDisplay(new Point(event.x - itemXOffset, event.y)).x;
614 Rectangle bounds = dragging.internalGetBounds();
615 if (event.y < bounds.y) {
616 moveUp(dragging, left_root);
617 } else if (event.y > bounds.y + bounds.height){
618 moveDown(dragging, left_root);
619 } else if (event.x < mouseXOffset) {
620 int distance = Math.min(mouseXOffset, bounds.x + itemXOffset) - event.x;
621 if (distance > 0) moveLeft(dragging, distance);
622 } else if (event.x > mouseXOffset) {
623 int distance = event.x - Math.max(mouseXOffset, bounds.x + itemXOffset);
624 if (distance > 0) moveRight(dragging, distance);
625 }
626 mouseXOffset = event.x;
627 } else {
628 if (grabbed !is null) {
629 _setCursor(hoverCursor);
630 } else {
631 _setCursor(null);
632 }
633 }
634 fixEvent(event);
635 }
636 void onMouseUp(Event event) {
637 _setCursor(null);
638 dragging = null;
639 }
640 void onMouseDoubleClick(Event event) {
641 if (isLocked) return;
642 dragging = null;
643 fixEvent(event);
644 CoolItem target = getGrabbedItem(event.x, event.y);
645 if (target is null) {
646 _setCursor(null);
647 } else {
648 Point location = findItem(target);
649 int row = location.y;
650 int index = location.x;
651 if (items[row].length > 1) {
652 Rectangle bounds = target.internalGetBounds();
653 int maxSize = getWidth ();
654 for (int i = 0; i < items[row].length; i++) {
655 if (i !is index) {
656 maxSize -= items[row][i].internalGetMinimumWidth();
657 }
658 }
659 if (bounds.width is maxSize) {
660 /* The item is at its maximum width. It should be resized to its minimum width. */
661 int distance = bounds.width - target.internalGetMinimumWidth();
662 if (index + 1 < items[row].length) {
663 /* There is an item to the right. Maximize it. */
664 CoolItem right = items[row][index + 1];
665 moveLeft(right, distance);
666 } else {
667 /* There is no item to the right. Move the item all the way right. */
668 moveRight(target, distance);
669 }
670 } else if (bounds.width < target.preferredWidth) {
671 /* The item is less than its preferredWidth. Resize to preferredWidth. */
672 int distance = target.preferredWidth - bounds.width;
673 if (index + 1 < items[row].length) {
674 CoolItem right = items[row][index + 1];
675 moveRight(right, distance);
676 distance = target.preferredWidth - target.internalGetBounds().width;
677 }
678 if (distance > 0) {
679 moveLeft(target, distance);
680 }
681 } else {
682 /* The item is at its minimum width. Maximize it. */
683 for (int i = 0; i < items[row].length; i++) {
684 if (i !is index) {
685 CoolItem item = items[row][i];
686 item.requestedWidth = Math.max(item.internalGetMinimumWidth(), CoolItem.MINIMUM_WIDTH);
687 }
688 }
689 target.requestedWidth = maxSize;
690 layoutItems();
691 }
692 _setCursor(hoverCursor);
693 }
694 }
695 fixEvent(event);
696 }
697 void onPaint(Event event) {
698 GC gc = event.gc;
699 if (items.length is 0) return;
700 Color shadowColor = display.getSystemColor(DWT.COLOR_WIDGET_NORMAL_SHADOW);
701 Color highlightColor = display.getSystemColor(DWT.COLOR_WIDGET_HIGHLIGHT_SHADOW);
702 bool vertical = (style & DWT.VERTICAL) !is 0;
703 bool flat = (style & DWT.FLAT) !is 0;
704 int stopX = getWidth();
705 Rectangle rect;
706 Rectangle clipping = gc.getClipping();
707 for (int row = 0; row < items.length; row++) {
708 Rectangle bounds = new Rectangle(0, 0, 0, 0);
709 for (int i = 0; i < items[row].length; i++) {
710 bounds = items[row][i].internalGetBounds();
711 rect = fixRectangle(bounds.x, bounds.y, bounds.width, bounds.height);
712 if (!clipping.intersects(rect)) continue;
713 bool nativeGripper = false;
714
715 /* Draw gripper. */
716 if (!isLocked) {
717 rect = fixRectangle(bounds.x, bounds.y, CoolItem.MINIMUM_WIDTH, bounds.height);
718 if (!flat) nativeGripper = drawGripper(rect.x, rect.y, rect.width, rect.height, vertical);
719 if (!nativeGripper) {
720 int grabberTrim = 2;
721 int grabberHeight = bounds.height - (2 * grabberTrim) - 1;
722 gc.setForeground(shadowColor);
723 rect = fixRectangle(
724 bounds.x + CoolItem.MARGIN_WIDTH,
725 bounds.y + grabberTrim,
726 2,
727 grabberHeight);
728 gc.drawRectangle(rect);
729 gc.setForeground(highlightColor);
730 rect = fixRectangle(
731 bounds.x + CoolItem.MARGIN_WIDTH,
732 bounds.y + grabberTrim + 1,
733 bounds.x + CoolItem.MARGIN_WIDTH,
734 bounds.y + grabberTrim + grabberHeight - 1);
735 gc.drawLine(rect.x, rect.y, rect.width, rect.height);
736 rect = fixRectangle(
737 bounds.x + CoolItem.MARGIN_WIDTH,
738 bounds.y + grabberTrim,
739 bounds.x + CoolItem.MARGIN_WIDTH + 1,
740 bounds.y + grabberTrim);
741 gc.drawLine(rect.x, rect.y, rect.width, rect.height);
742 }
743 }
744
745 /* Draw separator. */
746 if (!flat && !nativeGripper && i !is 0) {
747 gc.setForeground(shadowColor);
748 rect = fixRectangle(bounds.x, bounds.y, bounds.x, bounds.y + bounds.height - 1);
749 gc.drawLine(rect.x, rect.y, rect.width, rect.height);
750 gc.setForeground(highlightColor);
751 rect = fixRectangle(bounds.x + 1, bounds.y, bounds.x + 1, bounds.y + bounds.height - 1);
752 gc.drawLine(rect.x, rect.y, rect.width, rect.height);
753 }
754 }
755 if (!flat && row + 1 < items.length) {
756 /* Draw row separator. */
757 int separatorY = bounds.y + bounds.height;
758 gc.setForeground(shadowColor);
759 rect = fixRectangle(0, separatorY, stopX, separatorY);
760 gc.drawLine(rect.x, rect.y, rect.width, rect.height);
761 gc.setForeground(highlightColor);
762 rect = fixRectangle(0, separatorY + 1, stopX, separatorY + 1);
763 gc.drawLine(rect.x, rect.y, rect.width, rect.height);
764 }
765 }
766 }
767 void onResize () {
768 layoutItems ();
769 }
770 void removeControl (Control control) {
771 super.removeControl (control);
772 CoolItem [] items = getItems ();
773 for (int i=0; i<items.length; i++) {
774 CoolItem item = items [i];
775 if (item.control is control) item.setControl (null);
776 }
777 }
778 /**
779 * Remove the item from the row. Adjust the x and width values
780 * appropriately.
781 */
782 void removeItemFromRow(CoolItem item, int rowIndex, bool disposed) {
783 int index = findItem(item).x;
784 int newLength = items[rowIndex].length - 1;
785 Rectangle itemBounds = item.internalGetBounds();
786 item.wrap = false;
787 if (newLength > 0) {
788 CoolItem[] newRow = new CoolItem[newLength];
789 System.arraycopy(items[rowIndex], 0, newRow, 0, index);
790 System.arraycopy(items[rowIndex], index + 1, newRow, index, newRow.length - index);
791 items[rowIndex] = newRow;
792 items[rowIndex][0].wrap = true;
793 } else {
794 CoolItem[][] newRows = new CoolItem[items.length - 1][];
795 System.arraycopy(items, 0, newRows, 0, rowIndex);
796 System.arraycopy(items, rowIndex + 1, newRows, rowIndex, newRows.length - rowIndex);
797 items = newRows;
798 return;
799 }
800 if (!disposed) {
801 if (index is 0) {
802 CoolItem first = items[rowIndex][0];
803 Rectangle bounds = first.internalGetBounds();
804 int width = bounds.x + bounds.width;
805 first.setBounds(0, bounds.y, width, bounds.height);
806 first.requestedWidth = width;
807 internalRedraw(bounds.x, bounds.y, CoolItem.MINIMUM_WIDTH, bounds.height);
808 } else {
809 CoolItem previous = items[rowIndex][index - 1];
810 Rectangle bounds = previous.internalGetBounds();
811 int width = bounds.width + itemBounds.width;
812 previous.setBounds(bounds.x, bounds.y, width, bounds.height);
813 previous.requestedWidth = width;
814 }
815 }
816 }
817 /**
818 * Return the height of the bar after it has
819 * been properly laid out for the given width.
820 */
821 int layoutItems () {
822 int y = 0, width;
823 if ((style&DWT.VERTICAL) !is 0) {
824 width = getClientArea().height;
825 } else {
826 width = getClientArea().width;
827 }
828 wrapItems(width);
829 int rowSpacing = (style & DWT.FLAT) !is 0 ? 0 : ROW_SPACING;
830 for (int row = 0; row < items.length; row++) {
831 int count = items[row].length;
832 int x = 0;
833
834 /* determine the height and the available width for the row */
835 int rowHeight = 0;
836 int available = width;
837 for (int i = 0; i < count; i++) {
838 CoolItem item = items[row][i];
839 rowHeight = Math.max(rowHeight, item.internalGetBounds().height);
840 available -= item.internalGetMinimumWidth();
841 }
842 if (row > 0) y += rowSpacing;
843
844 /* lay the items out */
845 for (int i = 0; i < count; i++) {
846 CoolItem child = items[row][i];
847 int newWidth = available + child.internalGetMinimumWidth();
848 if (i + 1 < count) {
849 newWidth = Math.min(newWidth, child.requestedWidth);
850 available -= (newWidth - child.internalGetMinimumWidth());
851 }
852 Rectangle oldBounds = child.internalGetBounds();
853 Rectangle newBounds = new Rectangle(x, y, newWidth, rowHeight);
854 if (!oldBounds.equals(newBounds)) {
855 child.setBounds(newBounds.x, newBounds.y, newBounds.width, newBounds.height);
856 Rectangle damage = new Rectangle(0, 0, 0, 0);
857 /* Cases are in descending order from most area to redraw to least. */
858 if (oldBounds.y !is newBounds.y) {
859 damage = newBounds;
860 damage.add(oldBounds);
861 /* Redraw the row separator as well. */
862 damage.y -= rowSpacing;
863 damage.height += 2 * rowSpacing;
864 } else if (oldBounds.height !is newBounds.height) {
865 /*
866 * Draw from the bottom of the gripper to the bottom of the new area.
867 * (Bottom of the gripper is -3 from the bottom of the item).
868 */
869 damage.y = newBounds.y + Math.min(oldBounds.height, newBounds.height) - 3;
870 damage.height = newBounds.y + newBounds.height + rowSpacing;
871 damage.x = oldBounds.x - CoolItem.MARGIN_WIDTH;
872 damage.width = oldBounds.width + CoolItem.MARGIN_WIDTH;
873 } else if (oldBounds.x !is newBounds.x) {
874 /* Redraw only the difference between the separators. */
875 damage.x = Math.min(oldBounds.x, newBounds.x);
876 damage.width = Math.abs(oldBounds.x - newBounds.x) + CoolItem.MINIMUM_WIDTH;
877 damage.y = oldBounds.y;
878 damage.height = oldBounds.height;
879 }
880 internalRedraw(damage.x, damage.y, damage.width, damage.height);
881 }
882 x += newWidth;
883 }
884 y += rowHeight;
885 }
886 return y;
887 }
888 void relayout() {
889 Point size = getSize();
890 int height = layoutItems();
891 if ((style & DWT.VERTICAL) !is 0) {
892 Rectangle trim = computeTrim (0, 0, height, 0);
893 if (height !is size.x) super.setSize(trim.width, size.y);
894 } else {
895 Rectangle trim = computeTrim (0, 0, 0, height);
896 if (height !is size.y) super.setSize(size.x, trim.height);
897 }
898 }
899 /**
900 * Returns an array of zero-relative ints that map
901 * the creation order of the receiver's items to the
902 * order in which they are currently being displayed.
903 * <p>
904 * Specifically, the indices of the returned array represent
905 * the current visual order of the items, and the contents
906 * of the array represent the creation order of the items.
907 * </p><p>
908 * Note: This is not the actual structure used by the receiver
909 * to maintain its list of items, so modifying the array will
910 * not affect the receiver.
911 * </p>
912 *
913 * @return the current visual order of the receiver's items
914 *
915 * @exception DWTException <ul>
916 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
917 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
918 * </ul>
919 */
920 public int[] getItemOrder () {
921 checkWidget ();
922 int count = getItemCount ();
923 int [] indices = new int [count];
924 count = 0;
925 for (int i = 0; i < items.length; i++) {
926 for (int j = 0; j < items[i].length; j++) {
927 CoolItem item = items[i][j];
928 int index = 0;
929 while (index<originalItems.length) {
930 if (originalItems [index] is item) break;
931 index++;
932 }
933 if (index is originalItems.length) error (DWT.ERROR_CANNOT_GET_ITEM);
934 indices [count++] = index;
935 }
936 }
937 return indices;
938 }
939 void setItemOrder (int[] itemOrder) {
940 if (itemOrder is null) error(DWT.ERROR_NULL_ARGUMENT);
941 int count = originalItems.length;
942 if (itemOrder.length !is count) error(DWT.ERROR_INVALID_ARGUMENT);
943
944 /* Ensure that itemOrder does not contain any duplicates. */
945 bool [] set = new bool [count];
946 for (int i = 0; i < set.length; i++) set [i] = false;
947 for (int i = 0; i < itemOrder.length; i++) {
948 if (itemOrder [i] < 0 || itemOrder [i] >= count) error (DWT.ERROR_INVALID_ARGUMENT);
949 if (set [itemOrder [i]]) error (DWT.ERROR_INVALID_ARGUMENT);
950 set [itemOrder [i]] = true;
951 }
952
953 CoolItem[] row = new CoolItem[count];
954 for (int i = 0; i < count; i++) {
955 row[i] = originalItems[itemOrder[i]];
956 }
957 items = new CoolItem[1][count];
958 items[0] = row;
959 }
960 /**
961 * Returns an array of points whose x and y coordinates describe
962 * the widths and heights (respectively) of the items in the receiver
963 * in the order in which they are currently being displayed.
964 *
965 * @return the receiver's item sizes in their current visual order
966 *
967 * @exception DWTException <ul>
968 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
969 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
970 * </ul>
971 */
972 public Point[] getItemSizes () {
973 checkWidget();
974 CoolItem[] items = getItems();
975 Point[] sizes = new Point[items.length];
976 for (int i = 0; i < items.length; i++) {
977 sizes[i] = items[i].getSize();
978 }
979 return sizes;
980 }
981 void setItemSizes (Point[] sizes) {
982 if (sizes is null) error(DWT.ERROR_NULL_ARGUMENT);
983 CoolItem[] items = getItems();
984 if (sizes.length !is items.length) error(DWT.ERROR_INVALID_ARGUMENT);
985 for (int i = 0; i < items.length; i++) {
986 items[i].setSize(sizes[i]);
987 }
988 }
989 /**
990 * Returns whether or not the receiver is 'locked'. When a coolbar
991 * is locked, its items cannot be repositioned.
992 *
993 * @return true if the coolbar is locked, false otherwise
994 *
995 * @exception DWTException <ul>
996 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
997 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
998 * </ul>
999 *
1000 * @since 2.0
1001 */
1002 public bool getLocked () {
1003 checkWidget ();
1004 return isLocked;
1005 }
1006 int getWidth () {
1007 if ((style & DWT.VERTICAL) !is 0) return getSize().y;
1008 return getSize().x;
1009 }
1010 /**
1011 * Returns an array of ints that describe the zero-relative
1012 * indices of any item(s) in the receiver that will begin on
1013 * a new row. The 0th visible item always begins the first row,
1014 * therefore it does not count as a wrap index.
1015 *
1016 * @return an array containing the receiver's wrap indices, or an empty array if all items are in one row
1017 *
1018 * @exception DWTException <ul>
1019 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
1020 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
1021 * </ul>
1022 */
1023 public int[] getWrapIndices () {
1024 checkWidget();
1025 if (items.length <= 1) return new int[]{};
1026 int[] wrapIndices = new int[items.length - 1];
1027 int i = 0, nextWrap = items[0].length;
1028 for (int row = 1; row < items.length; row++) {
1029 if (items[row][0].wrap) wrapIndices[i++] = nextWrap;
1030 nextWrap += items[row].length;
1031 }
1032 if (i !is wrapIndices.length) {
1033 int[] tmp = new int[i];
1034 System.arraycopy(wrapIndices, 0, tmp, 0, i);
1035 return tmp;
1036 }
1037 return wrapIndices;
1038 }
1039 /**
1040 * Sets whether or not the receiver is 'locked'. When a coolbar
1041 * is locked, its items cannot be repositioned.
1042 *
1043 * @param locked lock the coolbar if true, otherwise unlock the coolbar
1044 *
1045 * @exception DWTException <ul>
1046 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
1047 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
1048 * </ul>
1049 *
1050 * @since 2.0
1051 */
1052 public void setLocked (bool locked) {
1053 checkWidget ();
1054 if (isLocked !is locked) {
1055 redraw();
1056 }
1057 isLocked = locked;
1058
1059 }
1060 /**
1061 * Sets the indices of all item(s) in the receiver that will
1062 * begin on a new row. The indices are given in the order in
1063 * which they are currently being displayed. The 0th item
1064 * always begins the first row, therefore it does not count
1065 * as a wrap index. If indices is null or empty, the items
1066 * will be placed on one line.
1067 *
1068 * @param indices an array of wrap indices, or null
1069 *
1070 * @exception DWTException <ul>
1071 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
1072 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
1073 * </ul>
1074 */
1075 public void setWrapIndices (int[] indices) {
1076 checkWidget();
1077 if (indices is null) indices = new int[0];
1078 int count = originalItems.length;
1079 for (int i=0; i<indices.length; i++) {
1080 if (indices[i] < 0 || indices[i] >= count) {
1081 error (DWT.ERROR_INVALID_ARGUMENT);
1082 }
1083 }
1084 for (int i=0; i<originalItems.length; i++) {
1085 originalItems[i].wrap = false;
1086 }
1087 for (int i=0; i<indices.length; i++) {
1088 int index = indices[i];
1089 for (int row = 0; row < items.length; row++) {
1090 if (items[row].length > index) {
1091 items[row][index].wrap = true;
1092 break;
1093 } else {
1094 index -= items[row].length;
1095 }
1096 }
1097 }
1098 relayout();
1099 }
1100 public void setCursor (Cursor cursor) {
1101 checkWidget ();
1102 super.setCursor (this.cursor = cursor);
1103 }
1104 /**
1105 * Sets the receiver's item order, wrap indices, and item sizes
1106 * all at once. This method is typically used to restore the
1107 * displayed state of the receiver to a previously stored state.
1108 * <p>
1109 * The item order is the order in which the items in the receiver
1110 * should be displayed, given in terms of the zero-relative ordering
1111 * of when the items were added.
1112 * </p><p>
1113 * The wrap indices are the indices of all item(s) in the receiver
1114 * that will begin on a new row. The indices are given in the order
1115 * specified by the item order. The 0th item always begins the first
1116 * row, therefore it does not count as a wrap index. If wrap indices
1117 * is null or empty, the items will be placed on one line.
1118 * </p><p>
1119 * The sizes are specified in an array of points whose x and y
1120 * coordinates describe the new widths and heights (respectively)
1121 * of the receiver's items in the order specified by the item order.
1122 * </p>
1123 *
1124 * @param itemOrder an array of indices that describe the new order to display the items in
1125 * @param wrapIndices an array of wrap indices, or null
1126 * @param sizes an array containing the new sizes for each of the receiver's items in visual order
1127 *
1128 * @exception DWTException <ul>
1129 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
1130 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
1131 * </ul>
1132 * @exception IllegalArgumentException <ul>
1133 * <li>ERROR_NULL_ARGUMENT - if item order or sizes is null</li>
1134 * <li>ERROR_INVALID_ARGUMENT - if item order or sizes is not the same length as the number of items</li>
1135 * </ul>
1136 */
1137 public void setItemLayout (int[] itemOrder, int[] wrapIndices, Point[] sizes) {
1138 checkWidget();
1139 setItemOrder(itemOrder);
1140 setWrapIndices(wrapIndices);
1141 setItemSizes(sizes);
1142 relayout();
1143 }
1144 void wrapItems (int maxWidth) {
1145 int itemCount = originalItems.length;
1146 if (itemCount < 2) return;
1147 CoolItem[] itemsVisual = new CoolItem[itemCount];
1148 int start = 0;
1149 for (int row = 0; row < items.length; row++) {
1150 System.arraycopy(items[row], 0, itemsVisual, start, items[row].length);
1151 start += items[row].length;
1152 }
1153 CoolItem[][] newItems = new CoolItem[itemCount][];
1154 int rowCount = 0, rowWidth = 0;
1155 start = 0;
1156 for (int i = 0; i < itemCount; i++) {
1157 CoolItem item = itemsVisual[i];
1158 int itemWidth = item.internalGetMinimumWidth();
1159 if ((i > 0 && item.wrap) || (maxWidth !is DWT.DEFAULT && rowWidth + itemWidth > maxWidth)) {
1160 if (i is start) {
1161 newItems[rowCount] = new CoolItem[1];
1162 newItems[rowCount][0] = item;
1163 start = i + 1;
1164 rowWidth = 0;
1165 } else {
1166 int count = i - start;
1167 newItems[rowCount] = new CoolItem[count];
1168 System.arraycopy(itemsVisual, start, newItems[rowCount], 0, count);
1169 start = i;
1170 rowWidth = itemWidth;
1171 }
1172 rowCount++;
1173 } else {
1174 rowWidth += itemWidth;
1175 }
1176 }
1177 if (start < itemCount) {
1178 int count = itemCount - start;
1179 newItems[rowCount] = new CoolItem[count];
1180 System.arraycopy(itemsVisual, start, newItems[rowCount], 0, count);
1181 rowCount++;
1182 }
1183 if (newItems.length !is rowCount) {
1184 CoolItem[][] tmp = new CoolItem[rowCount][];
1185 System.arraycopy(newItems, 0, tmp, 0, rowCount);
1186 items = tmp;
1187 } else {
1188 items = newItems;
1189 }
1190 }
1191 }