Skip to main content
aboutsummaryrefslogtreecommitdiffstats
blob: cf786af88b19e3df6201a78549c36255b03b01b7 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
/*******************************************************************************
 * Copyright (c) 2000, 2017 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.widgets;


import java.util.*;

import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.cairo.*;
import org.eclipse.swt.internal.gtk.*;

/**
 * Instances of this class are controls which are capable
 * of containing other controls.
 * <dl>
 * <dt><b>Styles:</b></dt>
 * <dd>NO_BACKGROUND, NO_FOCUS, NO_MERGE_PAINTS, NO_REDRAW_RESIZE, NO_RADIO_GROUP, EMBEDDED, DOUBLE_BUFFERED</dd>
 * <dt><b>Events:</b></dt>
 * <dd>(none)</dd>
 * </dl>
 * <p>
 * Note: The <code>NO_BACKGROUND</code>, <code>NO_FOCUS</code>, <code>NO_MERGE_PAINTS</code>,
 * and <code>NO_REDRAW_RESIZE</code> styles are intended for use with <code>Canvas</code>.
 * They can be used with <code>Composite</code> if you are drawing your own, but their
 * behavior is undefined if they are used with subclasses of <code>Composite</code> other
 * than <code>Canvas</code>.
 * </p><p>
 * Note: The <code>CENTER</code> style, although undefined for composites, has the
 * same value as <code>EMBEDDED</code> which is used to embed widgets from other
 * widget toolkits into SWT.  On some operating systems (GTK), this may cause
 * the children of this composite to be obscured.
 * </p><p>
 * This class may be subclassed by custom control implementors
 * who are building controls that are constructed from aggregates
 * of other controls.
 * </p>
 *
 * @see Canvas
 * @see <a href="http://www.eclipse.org/swt/snippets/#composite">Composite snippets</a>
 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
 */
public class Composite extends Scrollable {
	/**
	 * the handle to the OS resource
	 * (Warning: This field is platform dependent)
	 * <p>
	 * <b>IMPORTANT:</b> This field is <em>not</em> part of the SWT
	 * public API. It is marked public only so that it can be shared
	 * within the packages provided by SWT. It is not available on all
	 * platforms and should never be accessed from application code.
	 * </p>
	 *
	 * @noreference This field is not intended to be referenced by clients.
	 */
	public long /*int*/  embeddedHandle;
	long /*int*/ imHandle, socketHandle;
	Layout layout;
	Control[] tabList;
	int layoutCount, backgroundMode;
	/**
	 * When this field is set, it indicates that a child widget of this Composite
	 * needs to have its clip set to its allocation. This is because on GTK3.20+
	 * some widgets (like Combo) have their clips merged with that of their parent.
	 */
	long /*int*/ fixClipHandle;
	/**
	 * If fixClipHandle is set, then the fixClipMap HashMap contains children
	 * of fixClipHandle that also need to have their clips adjusted.
	 *
	 * <p>Each key is a Control which needs to have its clip adjusted, and each value
	 * is an array of handles (descendants of the Control) ordered by widget hierarchy.
	 * This array will be traversed in-order to adjust the clipping of each element.
	 * See bug 500703 and 535323.</p>
	 */
	Map<Control, long /*int*/ []> fixClipMap = new HashMap<> ();

	static final String NO_INPUT_METHOD = "org.eclipse.swt.internal.gtk.noInputMethod"; //$NON-NLS-1$

Composite () {
	/* Do nothing */
}

/**
 * Constructs a new instance of this class given its parent
 * and a style value describing its behavior and appearance.
 * <p>
 * The style value is either one of the style constants defined in
 * class <code>SWT</code> which is applicable to instances of this
 * class, or must be built by <em>bitwise OR</em>'ing together
 * (that is, using the <code>int</code> "|" operator) two or more
 * of those <code>SWT</code> style constants. The class description
 * lists the style constants that are applicable to the class.
 * Style bits are also inherited from superclasses.
 * </p>
 *
 * @param parent a widget which will be the parent of the new instance (cannot be null)
 * @param style the style of widget to construct
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
 * </ul>
 *
 * @see SWT#NO_BACKGROUND
 * @see SWT#NO_FOCUS
 * @see SWT#NO_MERGE_PAINTS
 * @see SWT#NO_REDRAW_RESIZE
 * @see SWT#NO_RADIO_GROUP
 * @see SWT#EMBEDDED
 * @see SWT#DOUBLE_BUFFERED
 * @see Widget#getStyle
 */
public Composite (Composite parent, int style) {
	super (parent, checkStyle (style));
}

static int checkStyle (int style) {
	style &= ~SWT.NO_BACKGROUND;
	style &= ~SWT.TRANSPARENT;
	return style;
}

Control [] _getChildren () {
	long /*int*/ parentHandle = parentingHandle ();
	long /*int*/ list = GTK.gtk_container_get_children (parentHandle);
	if (list == 0) return new Control [0];
	int count = OS.g_list_length (list);
	Control [] children = new Control [count];
	int i = 0;
	long /*int*/ temp = list;
	while (temp != 0) {
		long /*int*/ handle = OS.g_list_data (temp);
		if (handle != 0) {
			Widget widget = display.getWidget (handle);
			if (widget != null && widget != this) {
				if (widget instanceof Control) {
					children [i++] = (Control) widget;
				}
			}
		}
		temp = OS.g_list_next (temp);
	}
	OS.g_list_free (list);
	if (i == count) return children;
	Control [] newChildren = new Control [i];
	System.arraycopy (children, 0, newChildren, 0, i);
	return newChildren;
}

Control [] _getTabList () {
	if (tabList == null) return tabList;
	int count = 0;
	for (int i=0; i<tabList.length; i++) {
		if (!tabList [i].isDisposed ()) count++;
	}
	if (count == tabList.length) return tabList;
	Control [] newList = new Control [count];
	int index = 0;
	for (int i=0; i<tabList.length; i++) {
		if (!tabList [i].isDisposed ()) {
			newList [index++] = tabList [i];
		}
	}
	tabList = newList;
	return tabList;
}

/**
 * Clears any data that has been cached by a Layout for all widgets that
 * are in the parent hierarchy of the changed control up to and including the
 * receiver.  If an ancestor does not have a layout, it is skipped.
 *
 * @param changed an array of controls that changed state and require a recalculation of size
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the changed array is null any of its controls are null or have been disposed</li>
 *    <li>ERROR_INVALID_PARENT - if any control in changed is not in the widget tree of the receiver</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @deprecated use {@link Composite#layout(Control[], int)} instead
 * @since 3.1
 */
@Deprecated
public void changed (Control[] changed) {
	layout(changed, SWT.DEFER);
}

@Override
void checkBuffered () {
	if ((style & SWT.DOUBLE_BUFFERED) == 0 && (style & SWT.NO_BACKGROUND) != 0) {
		return;
	}
	super.checkBuffered();
}

@Override
protected void checkSubclass () {
	/* Do nothing - Subclassing is allowed */
}

@Override
long /*int*/ childStyle () {
	if (scrolledHandle != 0) return 0;
	return super.childStyle ();
}

@Override
Point computeSizeInPixels (int wHint, int hHint, boolean changed) {
	checkWidget ();
	display.runSkin();
	if (wHint != SWT.DEFAULT && wHint < 0) wHint = 0;
	if (hHint != SWT.DEFAULT && hHint < 0) hHint = 0;
	Point size;
	if (layout != null) {
		if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) {
			changed |= (state & LAYOUT_CHANGED) != 0;
			size = DPIUtil.autoScaleUp(layout.computeSize (this, DPIUtil.autoScaleDown(wHint), DPIUtil.autoScaleDown(hHint), changed));
			state &= ~LAYOUT_CHANGED;
		} else {
			size = new Point (wHint, hHint);
		}
	} else {
		size = minimumSize (wHint, hHint, changed);
		if (size.x == 0) size.x = DEFAULT_WIDTH;
		if (size.y == 0) size.y = DEFAULT_HEIGHT;
	}
	if (wHint != SWT.DEFAULT) size.x = wHint;
	if (hHint != SWT.DEFAULT) size.y = hHint;
	Rectangle trim = DPIUtil.autoScaleUp (computeTrim (0, 0, DPIUtil.autoScaleDown(size.x), DPIUtil.autoScaleDown(size.y)));
	return new Point (trim.width, trim.height);
}

@Override
Widget [] computeTabList () {
	Widget result [] = super.computeTabList ();
	if (result.length == 0) return result;
	Control [] list = tabList != null ? _getTabList () : _getChildren ();
	for (int i=0; i<list.length; i++) {
		Control child = list [i];
		Widget [] childList = child.computeTabList ();
		if (childList.length != 0) {
			Widget [] newResult = new Widget [result.length + childList.length];
			System.arraycopy (result, 0, newResult, 0, result.length);
			System.arraycopy (childList, 0, newResult, result.length, childList.length);
			result = newResult;
		}
	}
	return result;
}

@Override
void createHandle (int index) {
	state |= HANDLE | CANVAS | CHECK_SUBWINDOW;
	boolean scrolled = (style & (SWT.H_SCROLL | SWT.V_SCROLL)) != 0;
	if (!scrolled) state |= THEME_BACKGROUND;
	createHandle (index, true, scrolled || (style & SWT.BORDER) != 0);
}

@Override
int applyThemeBackground () {
	return (backgroundAlpha == 0 || (style & (SWT.H_SCROLL | SWT.V_SCROLL)) == 0) ? 1 : 0;
}

void createHandle (int index, boolean fixed, boolean scrolled) {
	if (scrolled) {
		if (fixed) {
			fixedHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0);
			if (fixedHandle == 0) error (SWT.ERROR_NO_HANDLES);
			GTK.gtk_widget_set_has_window (fixedHandle, true);
		}
		long /*int*/ vadj = GTK.gtk_adjustment_new (0, 0, 100, 1, 10, 10);
		if (vadj == 0) error (SWT.ERROR_NO_HANDLES);
		long /*int*/ hadj = GTK.gtk_adjustment_new (0, 0, 100, 1, 10, 10);
		if (hadj == 0) error (SWT.ERROR_NO_HANDLES);
		scrolledHandle = GTK.gtk_scrolled_window_new (hadj, vadj);
		if (scrolledHandle == 0) error (SWT.ERROR_NO_HANDLES);
	}
	handle = OS.g_object_new (display.gtk_fixed_get_type (), 0);
	if (handle == 0) error (SWT.ERROR_NO_HANDLES);
	GTK.gtk_widget_set_has_window (handle, true);
	GTK.gtk_widget_set_can_focus (handle, true);
	if ((style & SWT.EMBEDDED) == 0) {
		if ((state & CANVAS) != 0) {
			/* Prevent an input method context from being created for the Browser widget */
			if (display.getData (NO_INPUT_METHOD) == null) {
				imHandle = GTK.gtk_im_multicontext_new ();
				if (imHandle == 0) error (SWT.ERROR_NO_HANDLES);
			}
		}
	}
	if (scrolled) {
		if (fixed) GTK.gtk_container_add (fixedHandle, scrolledHandle);
		/*
		* Force the scrolledWindow to have a single child that is
		* not scrolled automatically.  Calling gtk_container_add()
		* seems to add the child correctly but cause a warning.
		*/
		boolean warnings = display.getWarnings ();
		display.setWarnings (false);
		GTK.gtk_container_add (scrolledHandle, handle);
		display.setWarnings (warnings);

		int hsp = (style & SWT.H_SCROLL) != 0 ? GTK.GTK_POLICY_ALWAYS : GTK.GTK_POLICY_NEVER;
		int vsp = (style & SWT.V_SCROLL) != 0 ? GTK.GTK_POLICY_ALWAYS : GTK.GTK_POLICY_NEVER;
		GTK.gtk_scrolled_window_set_policy (scrolledHandle, hsp, vsp);
		if (hasBorder ()) {
			GTK.gtk_scrolled_window_set_shadow_type (scrolledHandle, GTK.GTK_SHADOW_ETCHED_IN);
		}
	}
	if ((style & SWT.EMBEDDED) != 0) {
		if (!OS.isX11()) {
			if (Device.DEBUG) {
				new SWTError(SWT.ERROR_INVALID_ARGUMENT,"SWT.EMBEDDED is currently not yet supported in Wayland. \nPlease "
					+ "refer to https://bugs.eclipse.org/bugs/show_bug.cgi?id=514487 for development status.").printStackTrace();
			}
		} else {
			socketHandle = GTK.gtk_socket_new ();
			if (socketHandle == 0) error (SWT.ERROR_NO_HANDLES);
			GTK.gtk_container_add (handle, socketHandle);
		}
	}
	if ((style & SWT.NO_REDRAW_RESIZE) != 0 && (style & SWT.RIGHT_TO_LEFT) == 0) {
		GTK.gtk_widget_set_redraw_on_allocate (handle, false);
	}
	/*
	* Bug in GTK.  When a widget is double buffered and the back
	* pixmap is null, the double buffer pixmap is filled with the
	* background of the widget rather than the current contents of
	* the screen.  If nothing is drawn during an expose event,
	* the pixels are altered.  The fix is to clear double buffering
	* when NO_BACKGROUND is set and DOUBLE_BUFFERED
	* is not explicitly set.
	*/
	if ((style & SWT.DOUBLE_BUFFERED) == 0 && (style & SWT.NO_BACKGROUND) != 0) {
		GTK.gtk_widget_set_double_buffered (handle, false);
	}
}

/**
 * Iterates though the array of child widgets that need to have their clips
 * adjusted: if a child has a negative clip, adjust it. Also check if the child's
 * allocation is negative and adjust it as necessary.
 *
 * <p>If the array is empty this method just returns. See bug 500703.</p>
 */
void fixChildClippings () {
	if (fixClipHandle == 0 || fixClipMap.isEmpty()) {
		return;
	} else {
		GtkRequisition minimumSize = new GtkRequisition ();
		GtkRequisition naturalSize = new GtkRequisition ();
		GtkAllocation clip = new GtkAllocation ();
		GtkAllocation allocation = new GtkAllocation ();
		Control [] children = _getChildren();
		for (Control child : children) {
			if (fixClipMap.containsKey(child)) {
				long /*int*/ [] childHandles = fixClipMap.get(child);
				for (long /*int*/ widget : childHandles) {
					GTK.gtk_widget_get_allocation(widget, allocation);
					GTK.gtk_widget_get_clip(widget, clip);
					/*
					 * If the clip is negative, add the x coordinate to the width
					 * and set the x coordinate to 0.
					 */
					if (clip.x < 0) {
						clip.width = clip.width + clip.x;
						clip.x = 0;
						/*
						 * Some "transient" widgets like menus get allocations of
						 * {-1, -1, 1, 1}. Check to make sure this isn't the case
						 * before proceeding.
						 */
						if (allocation.x < -1 && (allocation.width > 1 || allocation.height > 1)) {
							// Adjust the allocation just like the clip, if it's negative
							allocation.width = allocation.width + allocation.x;
							allocation.x = 0;
							// Call gtk_widget_get_preferred_size() to prevent warnings
							GTK.gtk_widget_get_preferred_size(widget, minimumSize, naturalSize);
							// Allocate and queue a resize event
							GTK.gtk_widget_size_allocate(widget, allocation);
							GTK.gtk_widget_queue_resize(widget);
						}
					}
					// Adjust the clip
					GTK.gtk_widget_set_clip(widget, allocation);

				}
			}
		}
	}
}

@Override
long /*int*/ gtk_draw (long /*int*/ widget, long /*int*/ cairo) {
	if (GTK.GTK_VERSION >= OS.VERSION(3, 14, 0)) {
		long /*int*/ context = GTK.gtk_widget_get_style_context(widget);
		GtkAllocation allocation = new GtkAllocation();
		GTK.gtk_widget_get_allocation (widget, allocation);
		int width = (state & ZERO_WIDTH) != 0 ? 0 : allocation.width;
		int height = (state & ZERO_HEIGHT) != 0 ? 0 : allocation.height;
		// We specify a 0 value for x & y as we want the whole widget to be
		// colored, not some portion of it.
		GTK.gtk_render_background(context, cairo, 0, 0, width, height);
		if (GTK.GTK_VERSION >= OS.VERSION(3, 20, 0)) {
			// If fixClipHandle is set: iterate through the children of widget
			// and set their clips to be that of their allocation
			if (widget == fixClipHandle) fixChildClippings();
		}
	}
	return super.gtk_draw(widget, cairo);
}

@Override
void deregister () {
	super.deregister ();
	if (socketHandle != 0) display.removeWidget (socketHandle);
}

/**
 * Fills the interior of the rectangle specified by the arguments,
 * with the receiver's background.
 *
 * <p>The <code>offsetX</code> and <code>offsetY</code> are used to map from
 * the <code>gc</code> origin to the origin of the parent image background. This is useful
 * to ensure proper alignment of the image background.</p>
 *
 * @param gc the gc where the rectangle is to be filled
 * @param x the x coordinate of the rectangle to be filled
 * @param y the y coordinate of the rectangle to be filled
 * @param width the width of the rectangle to be filled
 * @param height the height of the rectangle to be filled
 * @param offsetX the image background x offset
 * @param offsetY the image background y offset
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the gc is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @since 3.6
 */
public void drawBackground (GC gc, int x, int y, int width, int height, int offsetX, int offsetY) {
	checkWidget();
	Rectangle rect = DPIUtil.autoScaleUp(new Rectangle (x, y, width, height));
	offsetX = DPIUtil.autoScaleUp(offsetX);
	offsetY = DPIUtil.autoScaleUp(offsetY);
	drawBackgroundInPixels(gc, rect.x, rect.y, rect.width, rect.height, offsetX, offsetY);
}

void drawBackgroundInPixels (GC gc, int x, int y, int width, int height, int offsetX, int offsetY) {
	checkWidget ();
	if (gc == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (gc.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	Control control = findBackgroundControl ();
	if (control != null) {
		GCData data = gc.getGCData ();
		long /*int*/ cairo = data.cairo;
		Cairo.cairo_save (cairo);
		if (control.backgroundImage != null) {
			Point pt = display.mapInPixels (this, control, 0, 0);
			Cairo.cairo_translate (cairo, -pt.x - offsetX, -pt.y - offsetY);
			x += pt.x + offsetX;
			y += pt.y + offsetY;
			long /*int*/ surface = control.backgroundImage.surface;
			if (surface == 0) {
				long /*int*/ drawable = control.backgroundImage.pixmap;
				int [] w = new int [1], h = new int [1];
				GDK.gdk_pixmap_get_size (drawable, w, h);
				if (OS.isX11()) {
					long /*int*/ xDisplay = GDK.gdk_x11_display_get_xdisplay(GDK.gdk_display_get_default());
					long /*int*/ xVisual = GDK.gdk_x11_visual_get_xvisual (GDK.gdk_visual_get_system());
					long /*int*/ xDrawable = GDK.GDK_PIXMAP_XID (drawable);
					surface = Cairo.cairo_xlib_surface_create (xDisplay, xDrawable, xVisual, w [0], h [0]);
				} else {
					surface = Cairo.cairo_image_surface_create(Cairo.CAIRO_FORMAT_ARGB32, w [0], h [0]);
				}
				if (surface == 0) error (SWT.ERROR_NO_HANDLES);
			} else {
				Cairo.cairo_surface_reference(surface);
			}
			long /*int*/ pattern = Cairo.cairo_pattern_create_for_surface (surface);
			if (pattern == 0) error (SWT.ERROR_NO_HANDLES);
			Cairo.cairo_pattern_set_extend (pattern, Cairo.CAIRO_EXTEND_REPEAT);
			if ((data.style & SWT.MIRRORED) != 0) {
				double[] matrix = {-1, 0, 0, 1, 0, 0};
				Cairo.cairo_pattern_set_matrix(pattern, matrix);
			}
			Cairo.cairo_set_source (cairo, pattern);
			Cairo.cairo_surface_destroy (surface);
			Cairo.cairo_pattern_destroy (pattern);
		} else {
			if (GTK.GTK3) {
				GdkRGBA rgba = control.getBackgroundGdkRGBA ();
				Cairo.cairo_set_source_rgba (cairo, rgba.red, rgba.green, rgba.blue, rgba.alpha);
			} else {
				GdkColor color = control.getBackgroundGdkColor ();
				Cairo.cairo_set_source_rgba_compatibility (cairo, color);
			}
		}
		Cairo.cairo_rectangle (cairo, x, y, width, height);
		Cairo.cairo_fill (cairo);
		Cairo.cairo_restore (cairo);
	} else {
		gc.fillRectangle(DPIUtil.autoScaleDown(new Rectangle(x, y, width, height)));

	}
}

@Override
void enableWidget (boolean enabled) {
	if ((state & CANVAS) != 0) return;
	super.enableWidget (enabled);
}

Composite findDeferredControl () {
	return layoutCount > 0 ? this : parent.findDeferredControl ();
}

@Override
Menu [] findMenus (Control control) {
	if (control == this) return new Menu [0];
	Menu result [] = super.findMenus (control);
	Control [] children = _getChildren ();
	for (int i=0; i<children.length; i++) {
		Control child = children [i];
		Menu [] menuList = child.findMenus (control);
		if (menuList.length != 0) {
			Menu [] newResult = new Menu [result.length + menuList.length];
			System.arraycopy (result, 0, newResult, 0, result.length);
			System.arraycopy (menuList, 0, newResult, result.length, menuList.length);
			result = newResult;
		}
	}
	return result;
}

@Override
void fixChildren (Shell newShell, Shell oldShell, Decorations newDecorations, Decorations oldDecorations, Menu [] menus) {
	super.fixChildren (newShell, oldShell, newDecorations, oldDecorations, menus);
	Control [] children = _getChildren ();
	for (int i=0; i<children.length; i++) {
		children [i].fixChildren (newShell, oldShell, newDecorations, oldDecorations, menus);
	}
}

@Override
void fixParentGdkWindow() {
	assert GTK.GTK3;
	// Changes to this method should be verified via
	// org.eclipse.swt.tests.gtk/*/Bug510803_TabFolder_TreeEditor_Regression.java (part two)
	for (Control child : _getChildren()) {
		child.fixParentGdkWindow();
	}
}

@Override
void fixModal(long /*int*/ group, long /*int*/ modalGroup)  {
	Control[] controls = _getChildren ();
	for (int i = 0; i < controls.length; i++) {
		controls[i].fixModal (group, modalGroup);
	}
}

@Override
void fixStyle () {
	super.fixStyle ();
	if (scrolledHandle == 0) fixStyle (handle);
	Control[] children = _getChildren ();
	for (int i = 0; i < children.length; i++) {
		children [i].fixStyle ();
	}
}

void fixTabList (Control control) {
	if (tabList == null) return;
	int count = 0;
	for (int i=0; i<tabList.length; i++) {
		if (tabList [i] == control) count++;
	}
	if (count == 0) return;
	Control [] newList = null;
	int length = tabList.length - count;
	if (length != 0) {
		newList = new Control [length];
		int index = 0;
		for (int i=0; i<tabList.length; i++) {
			if (tabList [i] != control) {
				newList [index++] = tabList [i];
			}
		}
	}
	tabList = newList;
}

void fixZOrder () {
	if ((state & CANVAS) != 0) return;
	long /*int*/ parentHandle = parentingHandle ();
	long /*int*/ parentWindow = gtk_widget_get_window (parentHandle);
	if (parentWindow == 0) return;
	long /*int*/ [] userData = new long /*int*/ [1];
	long /*int*/ windowList = GDK.gdk_window_get_children (parentWindow);
	if (windowList != 0) {
		long /*int*/ windows = windowList;
		while (windows != 0) {
			long /*int*/ window = OS.g_list_data (windows);
			if (window != redrawWindow) {
				GDK.gdk_window_get_user_data (window, userData);
				if (userData [0] == 0 || OS.G_OBJECT_TYPE (userData [0]) != display.gtk_fixed_get_type ()) {
					GDK.gdk_window_lower (window);
				}
			}
			windows = OS.g_list_next (windows);
		}
		OS.g_list_free (windowList);
	}
}

@Override
long /*int*/ focusHandle () {
	if (socketHandle != 0) return socketHandle;
	return super.focusHandle ();
}

@Override
boolean forceFocus (long /*int*/ focusHandle) {
	if (socketHandle != 0) GTK.gtk_widget_set_can_focus (focusHandle, true);
	boolean result = super.forceFocus (focusHandle);
	if (socketHandle != 0) GTK.gtk_widget_set_can_focus (focusHandle, false);
	return result;
}

/**
 * Returns the receiver's background drawing mode. This
 * will be one of the following constants defined in class
 * <code>SWT</code>:
 * <code>INHERIT_NONE</code>, <code>INHERIT_DEFAULT</code>,
 * <code>INHERIT_FORCE</code>.
 *
 * @return the background mode
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @see SWT
 *
 * @since 3.2
 */
public int getBackgroundMode () {
	checkWidget ();
	return backgroundMode;
}

/**
 * Returns a (possibly empty) array containing the receiver's children.
 * Children are returned in the order that they are drawn.  The topmost
 * control appears at the beginning of the array.  Subsequent controls
 * draw beneath this control and appear later in the array.
 * <p>
 * Note: This is not the actual structure used by the receiver
 * to maintain its list of children, so modifying the array will
 * not affect the receiver.
 * </p>
 *
 * @return an array of children
 *
 * @see Control#moveAbove
 * @see Control#moveBelow
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public Control [] getChildren () {
	checkWidget();
	return _getChildren ();
}

int getChildrenCount () {
	/*
	* NOTE: The current implementation will count
	* non-registered children.
	*/
	long /*int*/ list = GTK.gtk_container_get_children (handle);
	if (list == 0) return 0;
	int count = OS.g_list_length (list);
	OS.g_list_free (list);
	return count;
}

@Override
Rectangle getClientAreaInPixels () {
	checkWidget();
	if ((state & CANVAS) != 0) {
		if ((state & ZERO_WIDTH) != 0 && (state & ZERO_HEIGHT) != 0) {
			return new Rectangle (0, 0, 0, 0);
		}
		forceResize ();
		long /*int*/ clientHandle = clientHandle ();
		GtkAllocation allocation = new GtkAllocation();
		GTK.gtk_widget_get_allocation (clientHandle, allocation);
		int width = (state & ZERO_WIDTH) != 0 ? 0 : allocation.width;
		int height = (state & ZERO_HEIGHT) != 0 ? 0 : allocation.height;
		return new Rectangle (0, 0, width, height);
	}
	return super.getClientAreaInPixels();
}

/**
 * Returns layout which is associated with the receiver, or
 * null if one has not been set.
 *
 * @return the receiver's layout or null
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public Layout getLayout () {
	checkWidget();
	return layout;
}

/**
 * Returns <code>true</code> if the receiver has deferred
 * the performing of layout, and <code>false</code> otherwise.
 *
 * @return the receiver's deferred layout state
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @see #setLayoutDeferred(boolean)
 * @see #isLayoutDeferred()
 *
 * @since 3.1
 */
public boolean getLayoutDeferred () {
	checkWidget ();
	return layoutCount > 0 ;
}

/**
 * Gets the (possibly empty) tabbing order for the control.
 *
 * @return tabList the ordered list of controls representing the tab order
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @see #setTabList
 */
public Control [] getTabList () {
	checkWidget ();
	Control [] tabList = _getTabList ();
	if (tabList == null) {
		int count = 0;
		Control [] list =_getChildren ();
		for (int i=0; i<list.length; i++) {
			if (list [i].isTabGroup ()) count++;
		}
		tabList = new Control [count];
		int index = 0;
		for (int i=0; i<list.length; i++) {
			if (list [i].isTabGroup ()) {
				tabList [index++] = list [i];
			}
		}
	}
	return tabList;
}

@Override
long /*int*/ gtk_button_press_event (long /*int*/ widget, long /*int*/ event) {
	long /*int*/ result = super.gtk_button_press_event (widget, event);
	if (result != 0) return result;
	if ((state & CANVAS) != 0) {
		if ((style & SWT.NO_FOCUS) == 0 && hooksKeys ()) {
			GdkEventButton gdkEvent = new GdkEventButton ();
			OS.memmove (gdkEvent, event, GdkEventButton.sizeof);
			if (gdkEvent.button == 1) {
				if (getChildrenCount () == 0) setFocus ();
			}
		}
	}
	return result;
}

@Override
long /*int*/ gtk_expose_event (long /*int*/ widget, long /*int*/ eventPtr) {
	if ((state & OBSCURED) != 0) return 0;
	if ((state & CANVAS) == 0) {
		return super.gtk_expose_event (widget, eventPtr);
	}
	if ((style & SWT.NO_MERGE_PAINTS) == 0) {
		return super.gtk_expose_event (widget, eventPtr);
	}
	if (!hooksPaint ()) return 0;
	GdkEventExpose gdkEvent = new GdkEventExpose ();
	OS.memmove(gdkEvent, eventPtr, GdkEventExpose.sizeof);
	long /*int*/ [] rectangles = new long /*int*/ [1];
	int [] n_rectangles = new int [1];
	GDK.gdk_region_get_rectangles (gdkEvent.region, rectangles, n_rectangles);
	GdkRectangle rect = new GdkRectangle ();
	for (int i=0; i<n_rectangles[0]; i++) {
		Event event = new Event ();
		OS.memmove (rect, rectangles [0] + i * GdkRectangle.sizeof, GdkRectangle.sizeof);
		event.setBounds (DPIUtil.autoScaleDown (new Rectangle(rect.x, rect.y, rect.width, rect.height)));
		if ((style & SWT.MIRRORED) != 0) event.x = DPIUtil.autoScaleDown (getClientWidth ()) - event.width - event.x;
		long /*int*/ damageRgn = GDK.gdk_region_new ();
		GDK.gdk_region_union_with_rect (damageRgn, rect);
		GCData data = new GCData ();
		data.damageRgn = damageRgn;
		GC gc = event.gc = GC.gtk_new (this, data);
		sendEvent (SWT.Paint, event);
		gc.dispose ();
		GDK.gdk_region_destroy (damageRgn);
		event.gc = null;
	}
	OS.g_free (rectangles [0]);
	return 0;
}

@Override
long /*int*/ gtk_key_press_event (long /*int*/ widget, long /*int*/ event) {
	long /*int*/ result = super.gtk_key_press_event (widget, event);
	if (result != 0) return result;
	/*
	* Feature in GTK.  The default behavior when the return key
	* is pressed is to select the default button.  This is not the
	* expected behavior for Composite and its subclasses.  The
	* fix is to avoid calling the default handler.
	*/
	if ((state & CANVAS) != 0 && socketHandle == 0) {
		GdkEventKey keyEvent = new GdkEventKey ();
		OS.memmove (keyEvent, event, GdkEventKey.sizeof);
		int key = keyEvent.keyval;
		switch (key) {
			case GDK.GDK_Return:
			case GDK.GDK_KP_Enter: return 1;
		}
	}
	return result;
}

@Override
long /*int*/ gtk_focus (long /*int*/ widget, long /*int*/ directionType) {
	if (widget == socketHandle) return 0;
	return super.gtk_focus (widget, directionType);
}

@Override
long /*int*/ gtk_focus_in_event (long /*int*/ widget, long /*int*/ event) {
	long /*int*/ result = super.gtk_focus_in_event (widget, event);
	return (state & CANVAS) != 0 ? 1 : result;
}

@Override
long /*int*/ gtk_focus_out_event (long /*int*/ widget, long /*int*/ event) {
	long /*int*/ result = super.gtk_focus_out_event (widget, event);
	return (state & CANVAS) != 0 ? 1 : result;
}

@Override
long /*int*/ gtk_map (long /*int*/ widget) {
	fixZOrder ();
	return 0;
}

@Override
long /*int*/ gtk_realize (long /*int*/ widget) {
	long /*int*/ result = super.gtk_realize (widget);
	if ((style & SWT.NO_BACKGROUND) != 0) {
		long /*int*/ window = gtk_widget_get_window (paintHandle ());
		if (window != 0) {
			if (GTK.GTK3) {
				GDK.gdk_window_set_background_pattern(window, 0);
			} else {
				GDK.gdk_window_set_back_pixmap (window, 0, false);
			}
		}
	}
	if (socketHandle != 0) {
		embeddedHandle = GTK.gtk_socket_get_id (socketHandle);
	}
	return result;
}

@Override
long /*int*/ gtk_scroll_child (long /*int*/ widget, long /*int*/ scrollType, long /*int*/ horizontal) {
	/* Stop GTK scroll child signal for canvas */
	OS.g_signal_stop_emission_by_name (widget, OS.scroll_child);
	return 1;
}

@Override
long /*int*/ gtk_style_set (long /*int*/ widget, long /*int*/ previousStyle) {
	long /*int*/ result = super.gtk_style_set (widget, previousStyle);
	if ((style & SWT.NO_BACKGROUND) != 0) {
		long /*int*/ window = gtk_widget_get_window (paintHandle ());
		if (window != 0) GDK.gdk_window_set_back_pixmap (window, 0, false);
	}
	return result;
}

boolean hasBorder () {
	return (style & SWT.BORDER) != 0;
}

@Override
void hookEvents () {
	super.hookEvents ();
	if ((state & CANVAS) != 0) {
		GTK.gtk_widget_add_events (handle, GDK.GDK_POINTER_MOTION_HINT_MASK);
		if (scrolledHandle != 0) {
			OS.g_signal_connect_closure (scrolledHandle, OS.scroll_child, display.getClosure (SCROLL_CHILD), false);
		}
	}
}

boolean hooksKeys () {
	return hooks (SWT.KeyDown) || hooks (SWT.KeyUp);
}

@Override
long /*int*/ imHandle () {
	return imHandle;
}

/**
 * Returns <code>true</code> if the receiver or any ancestor
 * up to and including the receiver's nearest ancestor shell
 * has deferred the performing of layouts.  Otherwise, <code>false</code>
 * is returned.
 *
 * @return the receiver's deferred layout state
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @see #setLayoutDeferred(boolean)
 * @see #getLayoutDeferred()
 *
 * @since 3.1
 */
public boolean isLayoutDeferred () {
	checkWidget ();
	return findDeferredControl () != null;
}

@Override
boolean isTabGroup() {
	if ((state & CANVAS) != 0) return true;
	return super.isTabGroup();
}

/**
 * If the receiver has a layout, asks the layout to <em>lay out</em>
 * (that is, set the size and location of) the receiver's children.
 * If the receiver does not have a layout, do nothing.
 * <p>
 * Use of this method is discouraged since it is the least-efficient
 * way to trigger a layout. The use of <code>layout(true)</code>
 * discards all cached layout information, even from controls which
 * have not changed. It is much more efficient to invoke
 * {@link Control#requestLayout()} on every control which has changed
 * in the layout than it is to invoke this method on the layout itself.
 * </p>
 * <p>
 * This is equivalent to calling <code>layout(true)</code>.
 * </p>
 * <p>
 * Note: Layout is different from painting. If a child is
 * moved or resized such that an area in the parent is
 * exposed, then the parent will paint. If no child is
 * affected, the parent will not paint.
 * </p>
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void layout () {
	checkWidget ();
	layout (true);
}

/**
 * If the receiver has a layout, asks the layout to <em>lay out</em>
 * (that is, set the size and location of) the receiver's children.
 * If the argument is <code>true</code> the layout must not rely
 * on any information it has cached about the immediate children. If it
 * is <code>false</code> the layout may (potentially) optimize the
 * work it is doing by assuming that none of the receiver's
 * children has changed state since the last layout.
 * If the receiver does not have a layout, do nothing.
 * <p>
 * It is normally more efficient to invoke {@link Control#requestLayout()}
 * on every control which has changed in the layout than it is to invoke
 * this method on the layout itself. Clients are encouraged to use
 * {@link Control#requestLayout()} where possible instead of calling
 * this method.
 * </p>
 * <p>
 * If a child is resized as a result of a call to layout, the
 * resize event will invoke the layout of the child.  The layout
 * will cascade down through all child widgets in the receiver's widget
 * tree until a child is encountered that does not resize.  Note that
 * a layout due to a resize will not flush any cached information
 * (same as <code>layout(false)</code>).
 * </p>
 * <p>
 * Note: Layout is different from painting. If a child is
 * moved or resized such that an area in the parent is
 * exposed, then the parent will paint. If no child is
 * affected, the parent will not paint.
 * </p>
 *
 * @param changed <code>true</code> if the layout must flush its caches, and <code>false</code> otherwise
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void layout (boolean changed) {
	checkWidget ();
	if (layout == null) return;
	layout (changed, false);
}

/**
 * If the receiver has a layout, asks the layout to <em>lay out</em>
 * (that is, set the size and location of) the receiver's children.
 * If the changed argument is <code>true</code> the layout must not rely
 * on any information it has cached about its children. If it
 * is <code>false</code> the layout may (potentially) optimize the
 * work it is doing by assuming that none of the receiver's
 * children has changed state since the last layout.
 * If the all argument is <code>true</code> the layout will cascade down
 * through all child widgets in the receiver's widget tree, regardless of
 * whether the child has changed size.  The changed argument is applied to
 * all layouts.  If the all argument is <code>false</code>, the layout will
 * <em>not</em> cascade down through all child widgets in the receiver's widget
 * tree.  However, if a child is resized as a result of a call to layout, the
 * resize event will invoke the layout of the child.  Note that
 * a layout due to a resize will not flush any cached information
 * (same as <code>layout(false)</code>).
 * </p>
 * <p>
 * It is normally more efficient to invoke {@link Control#requestLayout()}
 * on every control which has changed in the layout than it is to invoke
 * this method on the layout itself. Clients are encouraged to use
 * {@link Control#requestLayout()} where possible instead of calling
 * this method.
 * </p>
 * <p>
 * Note: Layout is different from painting. If a child is
 * moved or resized such that an area in the parent is
 * exposed, then the parent will paint. If no child is
 * affected, the parent will not paint.
 * </p>
 *
 * @param changed <code>true</code> if the layout must flush its caches, and <code>false</code> otherwise
 * @param all <code>true</code> if all children in the receiver's widget tree should be laid out, and <code>false</code> otherwise
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @since 3.1
 */
public void layout (boolean changed, boolean all) {
	checkWidget ();
	if (layout == null && !all) return;
	markLayout (changed, all);
	updateLayout (all);
}

/**
 * Forces a lay out (that is, sets the size and location) of all widgets that
 * are in the parent hierarchy of the changed control up to and including the
 * receiver.  The layouts in the hierarchy must not rely on any information
 * cached about the changed control or any of its ancestors.  The layout may
 * (potentially) optimize the work it is doing by assuming that none of the
 * peers of the changed control have changed state since the last layout.
 * If an ancestor does not have a layout, skip it.
 * <p>
 * It is normally more efficient to invoke {@link Control#requestLayout()}
 * on every control which has changed in the layout than it is to invoke
 * this method on the layout itself. Clients are encouraged to use
 * {@link Control#requestLayout()} where possible instead of calling
 * this method.
 * </p>
 * <p>
 * Note: Layout is different from painting. If a child is
 * moved or resized such that an area in the parent is
 * exposed, then the parent will paint. If no child is
 * affected, the parent will not paint.
 * </p>
 *
 * @param changed a control that has had a state change which requires a recalculation of its size
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the changed array is null any of its controls are null or have been disposed</li>
 *    <li>ERROR_INVALID_PARENT - if any control in changed is not in the widget tree of the receiver</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @since 3.1
 */
public void layout (Control [] changed) {
	checkWidget ();
	if (changed == null) error (SWT.ERROR_INVALID_ARGUMENT);
	layout (changed, SWT.NONE);
}

/**
 * Forces a lay out (that is, sets the size and location) of all widgets that
 * are in the parent hierarchy of the changed control up to and including the
 * receiver.
 * <p>
 * The parameter <code>flags</code> may be a combination of:
 * <dl>
 * <dt><b>SWT.ALL</b></dt>
 * <dd>all children in the receiver's widget tree should be laid out</dd>
 * <dt><b>SWT.CHANGED</b></dt>
 * <dd>the layout must flush its caches</dd>
 * <dt><b>SWT.DEFER</b></dt>
 * <dd>layout will be deferred</dd>
 * </dl>
 * </p>
 * <p>
 * When the <code>changed</code> array is specified, the flags <code>SWT.ALL</code>
 * and <code>SWT.CHANGED</code> have no effect. In this case, the layouts in the
 * hierarchy must not rely on any information cached about the changed control or
 * any of its ancestors.  The layout may (potentially) optimize the
 * work it is doing by assuming that none of the peers of the changed
 * control have changed state since the last layout.
 * If an ancestor does not have a layout, skip it.
 * </p>
 * <p>
 * When the <code>changed</code> array is not specified, the flag <code>SWT.ALL</code>
 * indicates that the whole widget tree should be laid out. And the flag
 * <code>SWT.CHANGED</code> indicates that the layouts should flush any cached
 * information for all controls that are laid out.
 * </p>
 * <p>
 * The <code>SWT.DEFER</code> flag always causes the layout to be deferred by
 * calling <code>Composite.setLayoutDeferred(true)</code> and scheduling a call
 * to <code>Composite.setLayoutDeferred(false)</code>, which will happen when
 * appropriate (usually before the next event is handled). When this flag is set,
 * the application should not call <code>Composite.setLayoutDeferred(boolean)</code>.
 * </p>
 * <p>
 * Note: Layout is different from painting. If a child is
 * moved or resized such that an area in the parent is
 * exposed, then the parent will paint. If no child is
 * affected, the parent will not paint.
 * </p>
 *
 * @param changed a control that has had a state change which requires a recalculation of its size
 * @param flags the flags specifying how the layout should happen
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if any of the controls in changed is null or has been disposed</li>
 *    <li>ERROR_INVALID_PARENT - if any control in changed is not in the widget tree of the receiver</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @since 3.6
 */
public void layout (Control [] changed, int flags) {
	checkWidget ();
	if (changed != null) {
		for (int i=0; i<changed.length; i++) {
			Control control = changed [i];
			if (control == null) error (SWT.ERROR_INVALID_ARGUMENT);
			if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
			boolean ancestor = false;
			Composite composite = control.parent;
			while (composite != null) {
				ancestor = composite == this;
				if (ancestor) break;
				composite = composite.parent;
			}
			if (!ancestor) error (SWT.ERROR_INVALID_PARENT);
		}
		int updateCount = 0;
		Composite [] update = new Composite [16];
		for (int i=0; i<changed.length; i++) {
			Control child = changed [i];
			Composite composite = child.parent;
			// Update layout when the list of children has changed.
			// See bug 497812.
			child.markLayout(false, false);
			while (child != this) {
				if (composite.layout != null) {
					composite.state |= LAYOUT_NEEDED;
					if (!composite.layout.flushCache (child)) {
						composite.state |= LAYOUT_CHANGED;
					}
				}
				if (updateCount == update.length) {
					Composite [] newUpdate = new Composite [update.length + 16];
					System.arraycopy (update, 0, newUpdate, 0, update.length);
					update = newUpdate;
				}
				child = update [updateCount++] = composite;
				composite = child.parent;
			}
		}
		if ((flags & SWT.DEFER) != 0) {
			setLayoutDeferred (true);
			display.addLayoutDeferred (this);
		}
		for (int i=updateCount-1; i>=0; i--) {
			update [i].updateLayout (false);
		}
	} else {
		if (layout == null && (flags & SWT.ALL) == 0) return;
		markLayout ((flags & SWT.CHANGED) != 0, (flags & SWT.ALL) != 0);
		if ((flags & SWT.DEFER) != 0) {
			setLayoutDeferred (true);
			display.addLayoutDeferred (this);
		}
		updateLayout ((flags & SWT.ALL) != 0);
	}
}

@Override
void markLayout (boolean changed, boolean all) {
	if (layout != null) {
		state |= LAYOUT_NEEDED;
		if (changed) state |= LAYOUT_CHANGED;
	}
	if (all) {
		Control [] children = _getChildren ();
		for (int i=0; i<children.length; i++) {
			children [i].markLayout (changed, all);
		}
	}
}

void moveAbove (long /*int*/ child, long /*int*/ sibling) {
	if (child == sibling) return;
	long /*int*/ parentHandle = parentingHandle ();
	if (GTK.GTK3) {
		OS.swt_fixed_restack (parentHandle, child, sibling, true);
		return;
	}
	GtkFixed fixed = new GtkFixed ();
	OS.memmove (fixed, parentHandle);
	long /*int*/ children = fixed.children;
	if (children == 0) return;
	long /*int*/ [] data = new long /*int*/ [1];
	long /*int*/ [] widget = new long /*int*/ [1];
	long /*int*/ childData = 0, childLink = 0, siblingLink = 0, temp = children;
	while (temp != 0) {
		C.memmove (data, temp, C.PTR_SIZEOF);
		C.memmove (widget, data [0], C.PTR_SIZEOF);
		if (child == widget [0]) {
			childLink = temp;
			childData = data [0];
		} else if (sibling == widget [0]) {
			siblingLink = temp;
		}
		if (childData != 0 && (sibling == 0 || siblingLink != 0)) break;
		temp = OS.g_list_next (temp);
	}
	children = OS.g_list_remove_link (children, childLink);
	if (siblingLink == 0 || OS.g_list_previous (siblingLink) == 0) {
		OS.g_list_free_1 (childLink);
		children = OS.g_list_prepend (children, childData);
	} else {
		temp = OS.g_list_previous (siblingLink);
		OS.g_list_set_previous (childLink, temp);
		OS.g_list_set_next (temp, childLink);
		OS.g_list_set_next (childLink, siblingLink);
		OS.g_list_set_previous (siblingLink, childLink);
	}
	fixed.children = children;
	OS.memmove (parentHandle, fixed);
}

void moveBelow (long /*int*/ child, long /*int*/ sibling) {
	if (child == sibling) return;
	long /*int*/ parentHandle = parentingHandle ();
	if (sibling == 0 && parentHandle == fixedHandle) {
		moveAbove (child, scrolledHandle != 0  ? scrolledHandle : handle);
		return;
	}
	if (GTK.GTK3) {
		OS.swt_fixed_restack (parentHandle, child, sibling, false);
		return;
	}
	GtkFixed fixed = new GtkFixed ();
	OS.memmove (fixed, parentHandle);
	long /*int*/ children = fixed.children;
	if (children == 0) return;
	long /*int*/ [] data = new long /*int*/ [1];
	long /*int*/ [] widget = new long /*int*/ [1];
	long /*int*/ childData = 0, childLink = 0, siblingLink = 0, temp = children;
	while (temp != 0) {
		C.memmove (data, temp, C.PTR_SIZEOF);
		C.memmove (widget, data [0], C.PTR_SIZEOF);
		if (child == widget [0]) {
			childLink = temp;
			childData = data [0];
		} else if (sibling == widget [0]) {
			siblingLink = temp;
		}
		if (childData != 0 && (sibling == 0 || siblingLink != 0)) break;
		temp = OS.g_list_next (temp);
	}
	children = OS.g_list_remove_link (children, childLink);
	if (siblingLink == 0 || OS.g_list_next (siblingLink) == 0) {
		OS.g_list_free_1 (childLink);
		children = OS.g_list_append (children, childData);
	} else {
		temp = OS.g_list_next (siblingLink);
		OS.g_list_set_next (childLink, temp);
		OS.g_list_set_previous (temp, childLink);
		OS.g_list_set_previous (childLink, siblingLink);
		OS.g_list_set_next (siblingLink, childLink);
	}
	fixed.children = children;
	OS.memmove (parentHandle, fixed);
}

@Override
void moveChildren(int oldWidth) {
	Control[] children = _getChildren ();
	for (int i = 0; i < children.length; i++) {
		Control child = children[i];
		long /*int*/ topHandle = child.topHandle ();
		GtkAllocation allocation = new GtkAllocation();
		GTK.gtk_widget_get_allocation (topHandle, allocation);
		int x = allocation.x;
		int y = allocation.y;
		int controlWidth = (child.state & ZERO_WIDTH) != 0 ? 0 : allocation.width;
		if (oldWidth > 0) x = oldWidth - controlWidth - x;
		int clientWidth = getClientWidth ();
		x = clientWidth - controlWidth - x;
		if (child.enableWindow != 0) {
			GDK.gdk_window_move (child.enableWindow, x, y);
		}
		child.moveHandle (x, y);
		/*
		* Cause a size allocation this widget's topHandle.  Note that
		* all calls to gtk_widget_size_allocate() must be preceded by
		* a call to gtk_widget_size_request().
		*/
		GtkRequisition requisition = new GtkRequisition ();
		gtk_widget_size_request (topHandle, requisition);
		allocation.x = x;
		allocation.y = y;
		GTK.gtk_widget_size_allocate (topHandle, allocation);
		Control control = child.findBackgroundControl ();
		if (control != null && control.backgroundImage != null) {
			if (child.isVisible ()) child.redrawWidget (0, 0, 0, 0, true, true, true);
		}
	}
}

Point minimumSize (int wHint, int hHint, boolean changed) {
	Control [] children = _getChildren ();
	/*
	 * Since getClientArea can be overridden by subclasses, we cannot
	 * call getClientAreaInPixels directly.
	 */
	Rectangle clientArea = DPIUtil.autoScaleUp(getClientArea ());
	int width = 0, height = 0;
	for (int i=0; i<children.length; i++) {
		Rectangle rect = DPIUtil.autoScaleUp(children [i].getBounds ());
		width = Math.max (width, rect.x - clientArea.x + rect.width);
		height = Math.max (height, rect.y - clientArea.y + rect.height);
	}
	return new Point (width, height);
}

long /*int*/ parentingHandle () {
	if ((state & CANVAS) != 0) return handle;
	return fixedHandle != 0 ? fixedHandle : handle;
}

@Override
void printWidget (GC gc, long /*int*/ drawable, int depth, int x, int y) {
	Region oldClip = new Region (gc.getDevice ());
	Region newClip = new Region (gc.getDevice ());
	Point loc = DPIUtil.autoScaleDown(new Point (x, y));
	gc.getClipping (oldClip);
	Rectangle rect = getBounds ();
	newClip.add (oldClip);
	newClip.intersect (loc.x, loc.y, rect.width, rect.height);
	gc.setClipping (newClip);
	super.printWidget (gc, drawable, depth, x, y);
	Rectangle clientRect = getClientAreaInPixels ();
	Point pt = display.mapInPixels (this, parent, clientRect.x, clientRect.y);
	clientRect.x = x + pt.x - rect.x;
	clientRect.y = y + pt.y - rect.y;
	newClip.intersect (DPIUtil.autoScaleDown(clientRect));
	gc.setClipping (newClip);
	Control [] children = _getChildren ();
	for (int i=children.length-1; i>=0; --i) {
		Control child = children [i];
		if (child.getVisible ()) {
			Point location = child.getLocationInPixels ();
			child.printWidget (gc, drawable, depth, x + location.x, y + location.y);
		}
	}
	gc.setClipping (oldClip);
	oldClip.dispose ();
	newClip.dispose ();
}

/**
 * Connects this widget's fixedHandle to the "draw" signal.<br>
 * NOTE: only the "draw" (EXPOSE) signal is connected, not EXPOSE_EVENT_INVERSE.
 */
void connectFixedHandleDraw () {
	long /*int*/ paintHandle = fixedHandle;
	int paintMask = GDK.GDK_EXPOSURE_MASK;
	GTK.gtk_widget_add_events (paintHandle, paintMask);

	OS.g_signal_connect_closure_by_id (paintHandle, display.signalIds [DRAW], 0, display.getClosure (DRAW), true);
}

/**
 * <p>Propagates draw events from a parent container to its children using
 * gtk_container_propagate_draw(). This method only works if the fixedHandle
 * has been connected to the "draw" signal, and only propagates draw events
 * to other siblings of handle (i.e. other children of fixedHandle, but not
 * handle itself).</p>
 *
 * <p>It's useful to propagate draw events to other child widgets for things
 * like Table/Tree editors, or other scenarios where a widget is a child of
 * a non-standard container widget (i.e., not a direct child of a Composite).</p>
 *
 * @param container the parent container, i.e. fixedHandle
 * @param cairo the cairo context provided by GTK
 */
void propagateDraw (long /*int*/ container, long /*int*/ cairo) {
	if (container == fixedHandle && GTK.GTK3) {
		long /*int*/ list = GTK.gtk_container_get_children (container);
		long /*int*/ temp = list;
		while (temp != 0) {
			long /*int*/ child = OS.g_list_data (temp);
			if (child != 0) {
				Widget widget = display.getWidget (child);
				if (widget != this) {
					GTK.gtk_container_propagate_draw(container, child, cairo);
				}
			}
			temp = OS.g_list_next (temp);
		}
		OS.g_list_free (list);
	}
}

@Override
void redrawChildren () {
	super.redrawChildren ();
	Control [] children = _getChildren ();
	for (int i = 0; i < children.length; i++) {
		Control child = children [i];
		if ((child.state & PARENT_BACKGROUND) != 0) {
			child.redrawWidget (0, 0, 0, 0, true, false, true);
			child.redrawChildren ();
		}
	}
}

@Override
void register () {
	super.register ();
	if (socketHandle != 0) display.addWidget (socketHandle, this);
}

@Override
void releaseChildren (boolean destroy) {
	Control [] children = _getChildren ();
	for (int i=0; i<children.length; i++) {
		Control child = children [i];
		if (child != null && !child.isDisposed ()) {
			child.release (false);
		}
	}
	super.releaseChildren (destroy);
}

@Override
void releaseHandle () {
	super.releaseHandle ();
	socketHandle = embeddedHandle = 0;
}

@Override
void releaseWidget () {
	super.releaseWidget ();
	if (imHandle != 0) OS.g_object_unref (imHandle);
	imHandle = 0;
	layout = null;
	tabList = null;
}

void removeControl (Control control) {
	fixTabList (control);
}

@Override
void reskinChildren (int flags) {
	super.reskinChildren (flags);
	Control [] children = _getChildren ();
	for (int i=0; i<children.length; i++) {
		Control child = children [i];
		if (child != null) child.reskin (flags);
	}
}

@Override
void resizeHandle (int width, int height) {
	super.resizeHandle (width, height);
	if (socketHandle != 0) {
		if (GTK.GTK3) {
			OS.swt_fixed_resize (handle, socketHandle, width, height);
		} else {
			GTK.gtk_widget_set_size_request (socketHandle, width, height);
		}
	}
}

/**
 * Sets the background drawing mode to the argument which should
 * be one of the following constants defined in class <code>SWT</code>:
 * <code>INHERIT_NONE</code>, <code>INHERIT_DEFAULT</code>,
 * <code>INHERIT_FORCE</code>.
 *
 * @param mode the new background mode
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @see SWT
 *
 * @since 3.2
 */
public void setBackgroundMode (int mode) {
	checkWidget ();
	backgroundMode = mode;
	Control[] children = _getChildren ();
	for (int i = 0; i < children.length; i++) {
		children [i].updateBackgroundMode ();
	}
}

@Override
int setBounds (int x, int y, int width, int height, boolean move, boolean resize) {

	/* Bug 487757
	 * Deal with bug where for Gtk3.8+, ScrolledComposites appear empty or internal widgets don't
	 * get sized properly. When resizing shell, widgets appear or grow into correct size.
	 *
	 * The issue is that upon widget creation ZERO_HEIGHT/WIDTH is assigned to widget's state (createWidget());
	 * then if you call setVisible(false), setVisible(true) before a layout operation,
	 * in the setVisible(true) call, the widget is never shown. In Gtk3.8+ hidden widgets have a
	 * size of 0x0, and as such allocation is not done correctly until you manually re-size the parent.
	 *
	 * To resolve the issue we check if widget is not HIDDEN on SWT side, but is hidden on GTK side. If it
	 * is, then show it. This correctly initializes layout of internal widgets.
	 *
	 * Future note: If you observe non Composite widgets to have incorrect sizing on first display
	 * but fix themselfes upon first resize by mouse, then
	 * consider moving this fix higher into Control's setBound(...) method instead.
	 */
	long /*int*/ topHandle = topHandle ();
	if (GTK.GTK_VERSION >= OS.VERSION (3, 8, 0)
			&& fixedHandle != 0 && handle != 0
			&& getVisible() && !GTK.gtk_widget_get_visible(topHandle) //if SWT State is not HIDDEN, but widget is hidden on GTK side.
			&& topHandle == fixedHandle && width > 0 && height > 0 && resize) {
		GTK.gtk_widget_show(topHandle);
	}

	int result = super.setBounds (x, y, width, height, move, resize);
	if ((result & RESIZED) != 0 && layout != null) {
		markLayout (false, false);
		updateLayout (false);
	}
	return result;
}

@Override
public boolean setFocus () {
	checkWidget();
	Control [] children = _getChildren ();
	for (int i=0; i<children.length; i++) {
		Control child = children [i];
		if (child.getVisible () && child.setFocus ()) return true;
	}
	return super.setFocus ();
}

/**
 * Sets the layout which is associated with the receiver to be
 * the argument which may be null.
 *
 * @param layout the receiver's new layout or null
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setLayout (Layout layout) {
	checkWidget();
	this.layout = layout;
}

/**
 * If the argument is <code>true</code>, causes subsequent layout
 * operations in the receiver or any of its children to be ignored.
 * No layout of any kind can occur in the receiver or any of its
 * children until the flag is set to false.
 * Layout operations that occurred while the flag was
 * <code>true</code> are remembered and when the flag is set to
 * <code>false</code>, the layout operations are performed in an
 * optimized manner.  Nested calls to this method are stacked.
 *
 * @param defer the new defer state
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @see #layout(boolean)
 * @see #layout(Control[])
 *
 * @since 3.1
 */
public void setLayoutDeferred (boolean defer) {
	checkWidget();
	if (!defer) {
		if (--layoutCount == 0) {
			if ((state & LAYOUT_CHILD) != 0 || (state & LAYOUT_NEEDED) != 0) {
				updateLayout (true);
			}
		}
	} else {
		layoutCount++;
	}
}

@Override
void setOrientation (boolean create) {
	super.setOrientation (create);
	if (!create) {
		int flags = SWT.RIGHT_TO_LEFT | SWT.LEFT_TO_RIGHT;
		int orientation = style & flags;
		Control [] children = _getChildren ();
		for (int i=0; i<children.length; i++) {
			children[i].setOrientation (orientation);
		}
		if (((style & SWT.RIGHT_TO_LEFT) != 0) != ((style & SWT.MIRRORED) != 0)) {
			moveChildren (-1);
		}
	}
}

@Override
boolean setScrollBarVisible (ScrollBar bar, boolean visible) {
	boolean changed = super.setScrollBarVisible (bar, visible);
	if (changed && layout != null) {
		markLayout (false, false);
		updateLayout (false);
	}
	return changed;
}

@Override
boolean setTabGroupFocus (boolean next) {
	if (isTabItem ()) return setTabItemFocus (next);
	boolean takeFocus = (style & SWT.NO_FOCUS) == 0;
	if ((state & CANVAS) != 0) takeFocus = hooksKeys ();
	if (socketHandle != 0) takeFocus = true;
	if (takeFocus  && setTabItemFocus (next)) return true;
	Control [] children = _getChildren ();
	for (int i=0; i<children.length; i++) {
		Control child = children [i];
		if (child.isTabItem () && child.setTabItemFocus (next)) return true;
	}
	return false;
}

@Override
boolean setTabItemFocus (boolean next) {
	if (!super.setTabItemFocus (next)) return false;
	if (socketHandle != 0) {
		int direction = next ? GTK.GTK_DIR_TAB_FORWARD : GTK.GTK_DIR_TAB_BACKWARD;
		GTK.GTK_WIDGET_UNSET_FLAGS (socketHandle, GTK.GTK_HAS_FOCUS);
		GTK.gtk_widget_child_focus (socketHandle, direction);
		GTK.GTK_WIDGET_SET_FLAGS (socketHandle, GTK.GTK_HAS_FOCUS);
	}
	return true;
}

/**
 * Sets the tabbing order for the specified controls to
 * match the order that they occur in the argument list.
 *
 * @param tabList the ordered list of controls representing the tab order or null
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if a widget in the tabList is null or has been disposed</li>
 *    <li>ERROR_INVALID_PARENT - if widget in the tabList is not in the same widget tree</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setTabList (Control [] tabList) {
	checkWidget ();
	if (tabList != null) {
		for (int i=0; i<tabList.length; i++) {
			Control control = tabList [i];
			if (control == null) error (SWT.ERROR_INVALID_ARGUMENT);
			if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
			if (control.parent != this) error (SWT.ERROR_INVALID_PARENT);
		}
		Control [] newList = new Control [tabList.length];
		System.arraycopy (tabList, 0, newList, 0, tabList.length);
		tabList = newList;
	}
	this.tabList = tabList;
}

@Override
void showWidget () {
	super.showWidget ();
	if (socketHandle != 0) {
		GTK.gtk_widget_show (socketHandle);
		embeddedHandle = GTK.gtk_socket_get_id (socketHandle);
	}
	if (scrolledHandle == 0) fixStyle (handle);
}

@Override
boolean checkSubwindow () {
	return (state & CHECK_SUBWINDOW) != 0;
}

@Override
boolean translateMnemonic (Event event, Control control) {
	if (super.translateMnemonic (event, control)) return true;
	if (control != null) {
		Control [] children = _getChildren ();
		for (int i=0; i<children.length; i++) {
			Control child = children [i];
			if (child.translateMnemonic (event, control)) return true;
		}
	}
	return false;
}

@Override
int traversalCode(int key, GdkEventKey event) {
	if ((state & CANVAS) != 0) {
		if ((style & SWT.NO_FOCUS) != 0) return 0;
		if (hooksKeys ()) return 0;
	}
	return super.traversalCode (key, event);
}

@Override
boolean translateTraversal (GdkEventKey keyEvent) {
	if (socketHandle != 0) return false;
	return super.translateTraversal (keyEvent);
}

@Override
void updateBackgroundMode () {
	super.updateBackgroundMode ();
	Control [] children = _getChildren ();
	for (int i = 0; i < children.length; i++) {
		children [i].updateBackgroundMode ();
	}
}

@Override
void updateLayout (boolean all) {
	Composite parent = findDeferredControl ();
	if (parent != null) {
		parent.state |= LAYOUT_CHILD;
		return;
	}
	if ((state & LAYOUT_NEEDED) != 0) {
		boolean changed = (state & LAYOUT_CHANGED) != 0;
		state &= ~(LAYOUT_NEEDED | LAYOUT_CHANGED);
		display.runSkin();
		layout.layout (this, changed);
	}
	if (all) {
		state &= ~LAYOUT_CHILD;
		Control [] children = _getChildren ();
		for (int i=0; i<children.length; i++) {
			children [i].updateLayout (all);
		}
	}
}
}

Back to the top