Source code: org/eclipse/swt/widgets/Composite.java
1 /*******************************************************************************
2 * Copyright (c) 2000, 2004 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Common Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/cpl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 *******************************************************************************/
11 package org.eclipse.swt.widgets;
12
13
14 import org.eclipse.swt.*;
15 import org.eclipse.swt.internal.gtk.*;
16 import org.eclipse.swt.graphics.*;
17
18 /**
19 * Instances of this class are controls which are capable
20 * of containing other controls.
21 * <dl>
22 * <dt><b>Styles:</b></dt>
23 * <dd>NO_BACKGROUND, NO_FOCUS, NO_MERGE_PAINTS, NO_REDRAW_RESIZE, NO_RADIO_GROUP, EMBEDDED</dd>
24 * <dt><b>Events:</b></dt>
25 * <dd>(none)</dd>
26 * </dl>
27 * <p>
28 * Note: The <code>NO_BACKGROUND</code>, <code>NO_FOCUS</code>, <code>NO_MERGE_PAINTS</code>,
29 * and <code>NO_REDRAW_RESIZE</code> styles are intended for use with <code>Canvas</code>.
30 * They can be used with <code>Composite</code> if you are drawing your own, but their
31 * behavior is undefined if they are used with subclasses of <code>Composite</code> other
32 * than <code>Canvas</code>.
33 * </p><p>
34 * This class may be subclassed by custom control implementors
35 * who are building controls that are constructed from aggregates
36 * of other controls.
37 * </p>
38 *
39 * @see Canvas
40 */
41 public class Composite extends Scrollable {
42 public long /*int*/ embeddedHandle;
43 long /*int*/ imHandle, socketHandle;
44 Layout layout;
45 Control[] tabList;
46
47 Composite () {
48 /* Do nothing */
49 }
50
51 /**
52 * Constructs a new instance of this class given its parent
53 * and a style value describing its behavior and appearance.
54 * <p>
55 * The style value is either one of the style constants defined in
56 * class <code>SWT</code> which is applicable to instances of this
57 * class, or must be built by <em>bitwise OR</em>'ing together
58 * (that is, using the <code>int</code> "|" operator) two or more
59 * of those <code>SWT</code> style constants. The class description
60 * lists the style constants that are applicable to the class.
61 * Style bits are also inherited from superclasses.
62 * </p>
63 *
64 * @param parent a widget which will be the parent of the new instance (cannot be null)
65 * @param style the style of widget to construct
66 *
67 * @exception IllegalArgumentException <ul>
68 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
69 * </ul>
70 * @exception SWTException <ul>
71 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
72 * </ul>
73 *
74 * @see SWT#NO_BACKGROUND
75 * @see SWT#NO_FOCUS
76 * @see SWT#NO_MERGE_PAINTS
77 * @see SWT#NO_REDRAW_RESIZE
78 * @see SWT#NO_RADIO_GROUP
79 * @see Widget#getStyle
80 */
81 public Composite (Composite parent, int style) {
82 super (parent, style);
83 }
84
85 Control [] _getChildren () {
86 long /*int*/ parentHandle = parentingHandle ();
87 long /*int*/ list = OS.gtk_container_get_children (parentHandle);
88 if (list == 0) return new Control [0];
89 list = OS.g_list_reverse (list);
90 int count = OS.g_list_length (list);
91 Control [] children = new Control [count];
92 int i = 0, j = 0;
93 while (i < count) {
94 long /*int*/ handle = OS.g_list_nth_data (list, i);
95 if (handle != 0) {
96 Widget widget = display.getWidget (handle);
97 if (widget != null && widget != this) {
98 if (widget instanceof Control) {
99 children [j++] = (Control) widget;
100 }
101 }
102 }
103 i++;
104 }
105 OS.g_list_free (list);
106 if (i == j) return children;
107 Control [] newChildren = new Control [j];
108 System.arraycopy (children, 0, newChildren, 0, j);
109 return newChildren;
110 }
111
112 Control [] _getTabList () {
113 if (tabList == null) return tabList;
114 int count = 0;
115 for (int i=0; i<tabList.length; i++) {
116 if (!tabList [i].isDisposed ()) count++;
117 }
118 if (count == tabList.length) return tabList;
119 Control [] newList = new Control [count];
120 int index = 0;
121 for (int i=0; i<tabList.length; i++) {
122 if (!tabList [i].isDisposed ()) {
123 newList [index++] = tabList [i];
124 }
125 }
126 tabList = newList;
127 return tabList;
128 }
129
130 protected void checkSubclass () {
131 /* Do nothing - Subclassing is allowed */
132 }
133
134 public Point computeSize (int wHint, int hHint, boolean changed) {
135 checkWidget ();
136 if (wHint != SWT.DEFAULT && wHint < 0) wHint = 0;
137 if (hHint != SWT.DEFAULT && hHint < 0) hHint = 0;
138 Point size;
139 if (layout != null) {
140 if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) {
141 size = layout.computeSize (this, wHint, hHint, changed);
142 } else {
143 size = new Point (wHint, hHint);
144 }
145 } else {
146 size = minimumSize ();
147 }
148 if (size.x == 0) size.x = DEFAULT_WIDTH;
149 if (size.y == 0) size.y = DEFAULT_HEIGHT;
150 if (wHint != SWT.DEFAULT) size.x = wHint;
151 if (hHint != SWT.DEFAULT) size.y = hHint;
152 Rectangle trim = computeTrim (0, 0, size.x, size.y);
153 return new Point (trim.width, trim.height);
154 }
155
156 Control [] computeTabList () {
157 Control result [] = super.computeTabList ();
158 if (result.length == 0) return result;
159 Control [] list = tabList != null ? _getTabList () : _getChildren ();
160 for (int i=0; i<list.length; i++) {
161 Control child = list [i];
162 Control [] childList = child.computeTabList ();
163 if (childList.length != 0) {
164 Control [] newResult = new Control [result.length + childList.length];
165 System.arraycopy (result, 0, newResult, 0, result.length);
166 System.arraycopy (childList, 0, newResult, result.length, childList.length);
167 result = newResult;
168 }
169 }
170 return result;
171 }
172
173 void createHandle (int index) {
174 state |= HANDLE | CANVAS;
175 boolean scrolled = (style & (SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER)) != 0;
176 createHandle (index, parent.parentingHandle (), scrolled);
177 }
178
179 void createHandle (int index, long /*int*/ parentHandle, boolean scrolled) {
180 if (scrolled) {
181 fixedHandle = OS.gtk_fixed_new ();
182 if (fixedHandle == 0) error (SWT.ERROR_NO_HANDLES);
183 OS.gtk_fixed_set_has_window (fixedHandle, true);
184 long /*int*/ vadj = OS.gtk_adjustment_new (0, 0, 100, 1, 10, 10);
185 if (vadj == 0) error (SWT.ERROR_NO_HANDLES);
186 long /*int*/ hadj = OS.gtk_adjustment_new (0, 0, 100, 1, 10, 10);
187 if (hadj == 0) error (SWT.ERROR_NO_HANDLES);
188 scrolledHandle = OS.gtk_scrolled_window_new (hadj, vadj);
189 if (scrolledHandle == 0) SWT.error (SWT.ERROR_NO_HANDLES);
190 }
191 handle = OS.gtk_fixed_new ();
192 if (handle == 0) SWT.error (SWT.ERROR_NO_HANDLES);
193 OS.gtk_fixed_set_has_window (handle, true);
194 OS.GTK_WIDGET_SET_FLAGS(handle, OS.GTK_CAN_FOCUS);
195 if ((style & SWT.EMBEDDED) == 0) {
196 if ((state & CANVAS) != 0 && (style & SWT.NO_FOCUS) == 0) {
197 imHandle = OS.gtk_im_multicontext_new ();
198 if (imHandle == 0) error (SWT.ERROR_NO_HANDLES);
199 }
200 }
201 if (scrolled) {
202 OS.gtk_container_add (parentHandle, fixedHandle);
203 OS.gtk_container_add (fixedHandle, scrolledHandle);
204 /*
205 * Force the scrolledWindow to have a single child that is
206 * not scrolled automatically. Calling gtk_container_add
207 * seems to add the child correctly but cause a warning.
208 */
209 boolean warnings = display.getWarnings ();
210 display.setWarnings (false);
211 OS.gtk_container_add (scrolledHandle, handle);
212 display.setWarnings (warnings);
213
214 OS.gtk_widget_show (fixedHandle);
215 OS.gtk_widget_show (scrolledHandle);
216 int hsp = (style & SWT.H_SCROLL) != 0 ? OS.GTK_POLICY_ALWAYS : OS.GTK_POLICY_NEVER;
217 int vsp = (style & SWT.V_SCROLL) != 0 ? OS.GTK_POLICY_ALWAYS : OS.GTK_POLICY_NEVER;
218 OS.gtk_scrolled_window_set_policy (scrolledHandle, hsp, vsp);
219 //TODO - CHECK WIDTH IS THERE ALREADY THEN DON'T SET
220 if (hasBorder ()) {
221 OS.gtk_scrolled_window_set_shadow_type (scrolledHandle, OS.GTK_SHADOW_ETCHED_IN);
222 }
223 } else {
224 OS.gtk_container_add (parentHandle, handle);
225 }
226 OS.gtk_widget_show (handle);
227 if ((style & SWT.EMBEDDED) != 0) {
228 socketHandle = OS.gtk_socket_new ();
229 if (socketHandle == 0) SWT.error (SWT.ERROR_NO_HANDLES);
230 OS.gtk_container_add (handle, socketHandle);
231 OS.gtk_widget_show (socketHandle);
232 embeddedHandle = OS.gtk_socket_get_id (socketHandle);
233 }
234 if (imHandle != 0) {
235 long /*int*/ window = OS.GTK_WIDGET_WINDOW (handle);
236 if (window != 0) {
237 OS.gtk_im_context_set_client_window (imHandle, window);
238 }
239 }
240 if ((style & SWT.NO_REDRAW_RESIZE) != 0) {
241 OS.gtk_widget_set_redraw_on_allocate (handle, false);
242 }
243 }
244
245 void deregister () {
246 super.deregister ();
247 if (socketHandle != 0) display.removeWidget (socketHandle);
248 }
249
250 void enableWidget (boolean enabled) {
251 if ((state & CANVAS) != 0) return;
252 super.enableWidget (enabled);
253 }
254
255 Menu [] findMenus (Control control) {
256 if (control == this) return new Menu [0];
257 Menu result [] = super.findMenus (control);
258 Control [] children = _getChildren ();
259 for (int i=0; i<children.length; i++) {
260 Control child = children [i];
261 Menu [] menuList = child.findMenus (control);
262 if (menuList.length != 0) {
263 Menu [] newResult = new Menu [result.length + menuList.length];
264 System.arraycopy (result, 0, newResult, 0, result.length);
265 System.arraycopy (menuList, 0, newResult, result.length, menuList.length);
266 result = newResult;
267 }
268 }
269 return result;
270 }
271
272 void fixChildren (Shell newShell, Shell oldShell, Decorations newDecorations, Decorations oldDecorations, Menu [] menus) {
273 super.fixChildren (newShell, oldShell, newDecorations, oldDecorations, menus);
274 Control [] children = _getChildren ();
275 for (int i=0; i<children.length; i++) {
276 children [i].fixChildren (newShell, oldShell, newDecorations, oldDecorations, menus);
277 }
278 }
279
280 void fixTabList (Control control) {
281 if (tabList == null) return;
282 int count = 0;
283 for (int i=0; i<tabList.length; i++) {
284 if (tabList [i] == control) count++;
285 }
286 if (count == 0) return;
287 Control [] newList = null;
288 int length = tabList.length - count;
289 if (length != 0) {
290 newList = new Control [length];
291 int index = 0;
292 for (int i=0; i<tabList.length; i++) {
293 if (tabList [i] != control) {
294 newList [index++] = tabList [i];
295 }
296 }
297 }
298 tabList = newList;
299 }
300
301 long /*int*/ focusHandle () {
302 if (socketHandle != 0) return socketHandle;
303 return super.focusHandle ();
304 }
305
306 boolean forceFocus (long /*int*/ focusHandle) {
307 if (socketHandle != 0) OS.GTK_WIDGET_SET_FLAGS (focusHandle, OS.GTK_CAN_FOCUS);
308 boolean result = super.forceFocus (focusHandle);
309 if (socketHandle != 0) OS.GTK_WIDGET_UNSET_FLAGS (focusHandle, OS.GTK_CAN_FOCUS);
310 return result;
311 }
312
313 /**
314 * Returns an array containing the receiver's children.
315 * <p>
316 * Note: This is not the actual structure used by the receiver
317 * to maintain its list of children, so modifying the array will
318 * not affect the receiver.
319 * </p>
320 *
321 * @return an array of children
322 *
323 * @exception SWTException <ul>
324 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
325 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
326 * </ul>
327 */
328 public Control [] getChildren () {
329 checkWidget();
330 return _getChildren ();
331 }
332
333 int getChildrenCount () {
334 /*
335 * NOTE: The current implementation will count
336 * non-registered children.
337 */
338 long /*int*/ list = OS.gtk_container_get_children (handle);
339 if (list == 0) return 0;
340 int count = OS.g_list_length (list);
341 OS.g_list_free (list);
342 return count;
343 }
344
345 /**
346 * Returns layout which is associated with the receiver, or
347 * null if one has not been set.
348 *
349 * @return the receiver's layout or null
350 *
351 * @exception SWTException <ul>
352 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
353 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
354 * </ul>
355 */
356 public Layout getLayout () {
357 checkWidget();
358 return layout;
359 }
360
361 /**
362 * Gets the last specified tabbing order for the control.
363 *
364 * @return tabList the ordered list of controls representing the tab order
365 *
366 * @exception SWTException <ul>
367 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
368 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
369 * </ul>
370 *
371 * @see #setTabList
372 */
373 public Control [] getTabList () {
374 checkWidget ();
375 Control [] tabList = _getTabList ();
376 if (tabList == null) {
377 int count = 0;
378 Control [] list =_getChildren ();
379 for (int i=0; i<list.length; i++) {
380 if (list [i].isTabGroup ()) count++;
381 }
382 tabList = new Control [count];
383 int index = 0;
384 for (int i=0; i<list.length; i++) {
385 if (list [i].isTabGroup ()) {
386 tabList [index++] = list [i];
387 }
388 }
389 }
390 return tabList;
391 }
392
393 long /*int*/ gtk_button_press_event (long /*int*/ widget, long /*int*/ event) {
394 long /*int*/ result = super.gtk_button_press_event (widget, event);
395 if ((state & CANVAS) != 0) {
396 if ((style & SWT.NO_FOCUS) == 0 && hooksKeys ()) {
397 GdkEventButton gdkEvent = new GdkEventButton ();
398 OS.memmove (gdkEvent, event, GdkEventButton.sizeof);
399 if (gdkEvent.button == 1) {
400 if (getChildrenCount () == 0) setFocus ();
401 }
402 }
403 }
404 return result;
405 }
406
407 long /*int*/ gtk_expose_event (long /*int*/ widget, long /*int*/ eventPtr) {
408 if ((state & OBSCURED) != 0) return 0;
409 if ((state & CANVAS) == 0) {
410 return super.gtk_expose_event (widget, eventPtr);
411 }
412 if ((style & SWT.NO_MERGE_PAINTS) == 0) {
413 return super.gtk_expose_event (widget, eventPtr);
414 }
415 if (!hooks (SWT.Paint) && !filters (SWT.Paint)) return 0;
416 GdkEventExpose gdkEvent = new GdkEventExpose ();
417 OS.memmove(gdkEvent, eventPtr, GdkEventExpose.sizeof);
418 long /*int*/ [] rectangles = new long /*int*/ [1];
419 int [] n_rectangles = new int [1];
420 OS.gdk_region_get_rectangles (gdkEvent.region, rectangles, n_rectangles);
421 GdkRectangle rect = new GdkRectangle ();
422 for (int i=0; i<n_rectangles[0]; i++) {
423 Event event = new Event ();
424 OS.memmove (rect, rectangles [0] + i * GdkRectangle.sizeof, GdkRectangle.sizeof);
425 event.x = rect.x;
426 event.y = rect.y;
427 event.width = rect.width;
428 event.height = rect.height;
429 GC gc = event.gc = new GC (this);
430 gc.setClipping (event.x, event.y, event.width, event.height);
431 sendEvent (SWT.Paint, event);
432 gc.dispose ();
433 event.gc = null;
434 }
435 OS.g_free (rectangles [0]);
436 return 0;
437 }
438
439 long /*int*/ gtk_key_press_event (long /*int*/ widget, long /*int*/ event) {
440 long /*int*/ result = super.gtk_key_press_event (widget, event);
441 if (result != 0) return result;
442 /*
443 * Feature in GTK. The default behavior when the return key
444 * is pressed is to select the default button. This is not the
445 * expected behavior for Composite and its subclasses. The
446 * fix is to avoid calling the default handler.
447 */
448 if ((state & CANVAS) != 0) {
449 GdkEventKey keyEvent = new GdkEventKey ();
450 OS.memmove (keyEvent, event, GdkEventKey.sizeof);
451 int key = keyEvent.keyval;
452 switch (key) {
453 case OS.GDK_Return:
454 case OS.GDK_KP_Enter: return 1;
455 }
456 }
457 return result;
458 }
459
460 long /*int*/ gtk_focus (long /*int*/ widget, long /*int*/ directionType) {
461 if (widget == socketHandle) return 0;
462 return super.gtk_focus (widget, directionType);
463 }
464
465 long /*int*/ gtk_focus_in_event (long /*int*/ widget, long /*int*/ event) {
466 long /*int*/ result = super.gtk_focus_in_event (widget, event);
467 return (state & CANVAS) != 0 ? 1 : result;
468 }
469
470 long /*int*/ gtk_focus_out_event (long /*int*/ widget, long /*int*/ event) {
471 long /*int*/ result = super.gtk_focus_out_event (widget, event);
472 return (state & CANVAS) != 0 ? 1 : result;
473 }
474
475 long /*int*/ gtk_realize (long /*int*/ widget) {
476 long /*int*/ result = super.gtk_realize (widget);
477 if ((style & SWT.NO_BACKGROUND) != 0) {
478 long /*int*/ window = OS.GTK_WIDGET_WINDOW (paintHandle ());
479 if (window != 0) OS.gdk_window_set_back_pixmap (window, 0, false);
480 }
481 return result;
482 }
483
484 long /*int*/ gtk_scroll_child (long /*int*/ widget, long /*int*/ scrollType, long /*int*/ horizontal) {
485 /* Stop GTK scroll child signal for canvas */
486 OS.g_signal_stop_emission_by_name (widget, OS.scroll_child);
487 return 1;
488 }
489
490 long /*int*/ gtk_style_set (long /*int*/ widget, long /*int*/ previousStyle) {
491 if ((style & SWT.NO_BACKGROUND) != 0) {
492 long /*int*/ window = OS.GTK_WIDGET_WINDOW (paintHandle ());
493 if (window != 0) OS.gdk_window_set_back_pixmap (window, 0, false);
494 }
495 return 0;
496 }
497
498 boolean hasBorder () {
499 return (style & SWT.BORDER) != 0;
500 }
501
502 void hookEvents () {
503 super.hookEvents ();
504 if ((state & CANVAS) != 0) {
505 OS.gtk_widget_add_events (handle, OS.GDK_POINTER_MOTION_HINT_MASK);
506 if (scrolledHandle != 0) {
507 OS.g_signal_connect (scrolledHandle, OS.scroll_child, display.windowProc4, SCROLL_CHILD);
508 }
509 if ((style & SWT.NO_BACKGROUND) != 0) {
510 OS.g_signal_connect (handle, OS.style_set, display.windowProc3, STYLE_SET);
511 }
512 }
513 }
514
515 boolean hooksKeys () {
516 return hooks (SWT.KeyDown) || hooks (SWT.KeyUp);
517 }
518
519 long /*int*/ imHandle () {
520 return imHandle;
521 }
522
523 boolean isTabGroup() {
524 if ((state & CANVAS) != 0) return true;
525 return super.isTabGroup();
526 }
527
528 /**
529 * If the receiver has a layout, asks the layout to <em>lay out</em>
530 * (that is, set the size and location of) the receiver's children.
531 * If the receiver does not have a layout, do nothing.
532 * <p>
533 * This is equivalent to calling <code>layout(true)</code>.
534 * </p>
535 *
536 * @exception SWTException <ul>
537 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
538 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
539 * </ul>
540 */
541 public void layout () {
542 layout (true);
543 }
544
545 /**
546 * If the receiver has a layout, asks the layout to <em>lay out</em>
547 * (that is, set the size and location of) the receiver's children.
548 * If the the argument is <code>true</code> the layout must not rely
549 * on any cached information it is keeping about the children. If it
550 * is <code>false</code> the layout may (potentially) simplify the
551 * work it is doing by assuming that the state of the none of the
552 * receiver's children has changed since the last layout.
553 * If the receiver does not have a layout, do nothing.
554 *
555 * @param changed <code>true</code> if the layout must flush its caches, and <code>false</code> otherwise
556 *
557 * @exception SWTException <ul>
558 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
559 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
560 * </ul>
561 */
562 public void layout (boolean changed) {
563 checkWidget();
564 if (layout == null) return;
565 layout.layout (this, changed);
566 }
567
568 void moveAbove (long /*int*/ child, long /*int*/ sibling) {
569 if (child == sibling) return;
570 long /*int*/ parentHandle = parentingHandle ();
571 GtkFixed fixed = new GtkFixed ();
572 OS.memmove (fixed, parentHandle);
573 long /*int*/ children = fixed.children;
574 if (children == 0) return;
575 long /*int*/ [] data = new long /*int*/ [1];
576 long /*int*/ [] widget = new long /*int*/ [1];
577 long /*int*/ childData = 0, childLink = 0, siblingLink = 0, temp = children;
578 while (temp != 0) {
579 OS.memmove (data, temp, OS.PTR_SIZEOF);
580 OS.memmove (widget, data [0], OS.PTR_SIZEOF);
581 if (child == widget [0]) {
582 childLink = temp;
583 childData = data [0];
584 } else if (sibling == widget [0]) {
585 siblingLink = temp;
586 }
587 if (childData != 0 && (sibling == 0 || siblingLink != 0)) break;
588 temp = OS.g_list_next (temp);
589 }
590 children = OS.g_list_remove_link (children, childLink);
591 if (siblingLink == 0 || OS.g_list_next (siblingLink) == 0) {
592 OS.g_list_free_1 (childLink);
593 children = OS.g_list_append (children, childData);
594 } else {
595 temp = OS.g_list_next (siblingLink);
596 OS.g_list_set_next (childLink, temp);
597 OS.g_list_set_previous (temp, childLink);
598 OS.g_list_set_previous (childLink, siblingLink);
599 OS.g_list_set_next (siblingLink, childLink);
600 }
601 fixed.children = children;
602 OS.memmove (parentHandle, fixed);
603 }
604
605 void moveBelow (long /*int*/ child, long /*int*/ sibling) {
606 if (child == sibling) return;
607 long /*int*/ parentHandle = parentingHandle ();
608 if (sibling == 0 && parentHandle == fixedHandle) {
609 moveAbove (child, handle);
610 return;
611 }
612 GtkFixed fixed = new GtkFixed ();
613 OS.memmove (fixed, parentHandle);
614 long /*int*/ children = fixed.children;
615 if (children == 0) return;
616 long /*int*/ [] data = new long /*int*/ [1];
617 long /*int*/ [] widget = new long /*int*/ [1];
618 long /*int*/ childData = 0, childLink = 0, siblingLink = 0, temp = children;
619 while (temp != 0) {
620 OS.memmove (data, temp, OS.PTR_SIZEOF);
621 OS.memmove (widget, data [0], OS.PTR_SIZEOF);
622 if (child == widget [0]) {
623 childLink = temp;
624 childData = data [0];
625 } else if (sibling == widget [0]) {
626 siblingLink = temp;
627 }
628 if (childData != 0 && (sibling == 0 || siblingLink != 0)) break;
629 temp = OS.g_list_next (temp);
630 }
631 children = OS.g_list_remove_link (children, childLink);
632 if (siblingLink == 0 || OS.g_list_previous (siblingLink) == 0) {
633 OS.g_list_free_1 (childLink);
634 children = OS.g_list_prepend (children, childData);
635 } else {
636 temp = OS.g_list_previous (siblingLink);
637 OS.g_list_set_previous (childLink, temp);
638 OS.g_list_set_next (temp, childLink);
639 OS.g_list_set_next (childLink, siblingLink);
640 OS.g_list_set_previous (siblingLink, childLink);
641 }
642 fixed.children = children;
643 OS.memmove (parentHandle, fixed);
644 }
645
646 Point minimumSize () {
647 Control [] children = _getChildren ();
648 int width = 0, height = 0;
649 for (int i=0; i<children.length; i++) {
650 Rectangle rect = children [i].getBounds ();
651 width = Math.max (width, rect.x + rect.width);
652 height = Math.max (height, rect.y + rect.height);
653 }
654 return new Point (width, height);
655 }
656
657 long /*int*/ parentingHandle () {
658 if ((state & CANVAS) != 0) return handle;
659 return fixedHandle != 0 ? fixedHandle : handle;
660 }
661
662 void register () {
663 super.register ();
664 if (socketHandle != 0) display.addWidget (socketHandle, this);
665 }
666
667 void releaseChildren () {
668 Control [] children = _getChildren ();
669 for (int i=0; i<children.length; i++) {
670 Control child = children [i];
671 if (child != null && !child.isDisposed ()) child.releaseResources ();
672 }
673 }
674
675 void releaseWidget () {
676 releaseChildren ();
677 super.releaseWidget ();
678 if (imHandle != 0) OS.g_object_unref (imHandle);
679 imHandle = 0;
680 layout = null;
681 }
682
683 void removeControl (Control control) {
684 fixTabList (control);
685 }
686
687 void resizeHandle (int width, int height) {
688 super.resizeHandle (width, height);
689 if (socketHandle != 0) OS.gtk_widget_set_size_request (socketHandle, width, height);
690 }
691
692 boolean setBounds (int x, int y, int width, int height, boolean move, boolean resize) {
693 boolean changed = super.setBounds (x, y, width, height, move, resize);
694 if (changed && resize && layout != null) layout.layout (this, false);
695 return changed;
696 }
697
698 public boolean setFocus () {
699 checkWidget();
700 Control [] children = _getChildren ();
701 for (int i=0; i<children.length; i++) {
702 Control child = children [i];
703 if (child.getVisible () && child.setFocus ()) return true;
704 }
705 return super.setFocus ();
706 }
707
708 /**
709 * Sets the layout which is associated with the receiver to be
710 * the argument which may be null.
711 *
712 * @param layout the receiver's new layout or null
713 *
714 * @exception SWTException <ul>
715 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
716 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
717 * </ul>
718 */
719 public void setLayout (Layout layout) {
720 checkWidget();
721 this.layout = layout;
722 }
723
724 boolean setTabGroupFocus (boolean next) {
725 if (isTabItem ()) return setTabItemFocus (next);
726 boolean takeFocus = (style & SWT.NO_FOCUS) == 0;
727 if ((state & CANVAS) != 0) takeFocus = hooksKeys ();
728 if (socketHandle != 0) takeFocus = true;
729 if (takeFocus && setTabItemFocus (next)) return true;
730 Control [] children = _getChildren ();
731 for (int i=0; i<children.length; i++) {
732 Control child = children [i];
733 if (child.isTabItem () && child.setTabItemFocus (next)) return true;
734 }
735 return false;
736 }
737
738 boolean setTabItemFocus (boolean next) {
739 if (!super.setTabItemFocus (next)) return false;
740 if (socketHandle != 0) {
741 int direction = next ? OS.GTK_DIR_TAB_FORWARD : OS.GTK_DIR_TAB_BACKWARD;
742 OS.GTK_WIDGET_UNSET_FLAGS (socketHandle, OS.GTK_HAS_FOCUS);
743 OS.gtk_widget_child_focus (socketHandle, direction);
744 OS.GTK_WIDGET_SET_FLAGS (socketHandle, OS.GTK_HAS_FOCUS);
745 }
746 return true;
747 }
748
749 /**
750 * Sets the tabbing order for the specified controls to
751 * match the order that they occur in the argument list.
752 *
753 * @param tabList the ordered list of controls representing the tab order or null
754 *
755 * @exception IllegalArgumentException <ul>
756 * <li>ERROR_INVALID_ARGUMENT - if a widget in the tabList is null or has been disposed</li>
757 * <li>ERROR_INVALID_PARENT - if widget in the tabList is not in the same widget tree</li>
758 * </ul>
759 * @exception SWTException <ul>
760 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
761 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
762 * </ul>
763 */
764 public void setTabList (Control [] tabList) {
765 checkWidget ();
766 if (tabList != null) {
767 for (int i=0; i<tabList.length; i++) {
768 Control control = tabList [i];
769 if (control == null) error (SWT.ERROR_INVALID_ARGUMENT);
770 if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
771 if (control.parent != this) error (SWT.ERROR_INVALID_PARENT);
772 }
773 Control [] newList = new Control [tabList.length];
774 System.arraycopy (tabList, 0, newList, 0, tabList.length);
775 tabList = newList;
776 }
777 this.tabList = tabList;
778 }
779
780 boolean translateMnemonic (Event event, Control control) {
781 if (super.translateMnemonic (event, control)) return true;
782 if (control != null) {
783 Control [] children = _getChildren ();
784 for (int i=0; i<children.length; i++) {
785 Control child = children [i];
786 if (child.translateMnemonic (event, control)) return true;
787 }
788 }
789 return false;
790 }
791
792 int traversalCode(int key, GdkEventKey event) {
793 if ((state & CANVAS) != 0) {
794 if ((style & SWT.NO_FOCUS) != 0) return 0;
795 if (hooksKeys ()) return 0;
796 }
797 return super.traversalCode (key, event);
798 }
799
800 boolean translateTraversal (GdkEventKey keyEvent) {
801 if (socketHandle != 0) return false;
802 return super.translateTraversal (keyEvent);
803 }
804
805 }