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
|
/*******************************************************************************
* Copyright (c) 2000, 2009 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 org.eclipse.swt.internal.wpf.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;
/**
* Instances of this class are selectable user interface
* objects that allow the user to enter and modify text.
* Text controls can be either single or multi-line.
* When a text control is created with a border, the
* operating system includes a platform specific inset
* around the contents of the control. When created
* without a border, an effort is made to remove the
* inset such that the preferred size of the control
* is the same size as the contents.
* <p>
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>CENTER, ICON_CANCEL, ICON_SEARCH, LEFT, MULTI, PASSWORD, SEARCH, SINGLE, RIGHT, READ_ONLY, WRAP</dd>
* <dt><b>Events:</b></dt>
* <dd>DefaultSelection, Modify, Verify, OrientationChange</dd>
* </dl>
* <p>
* Note: Only one of the styles MULTI and SINGLE may be specified,
* and only one of the styles LEFT, CENTER, and RIGHT may be specified.
* </p>
* <p>
* Note: The styles ICON_CANCEL and ICON_SEARCH are hints used in combination with SEARCH.
* When the platform supports the hint, the text control shows these icons. When an icon
* is selected, a default selection event is sent with the detail field set to one of
* ICON_CANCEL or ICON_SEARCH. Normally, application code does not need to check the
* detail. In the case of ICON_CANCEL, the text is cleared before the default selection
* event is sent causing the application to search for an empty string.
* </p>
* <p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#text">Text snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Text extends Scrollable {
boolean doubleClick;
/**
* The maximum number of characters that can be entered
* into a text widget.
* <p>
* Note that this value is platform dependent, based upon
* the native widget implementation.
* </p>
*/
public static final int LIMIT;
/**
* The delimiter used by multi-line text widgets. When text
* is queried and from the widget, it will be delimited using
* this delimiter.
*/
public static final String DELIMITER;
/*
* This code is intentionally commented.
*/
// static final char PASSWORD;
/*
* These values can be different on different platforms.
* Therefore they are not initialized in the declaration
* to stop the compiler from inlining.
*/
static {
LIMIT = 0x7FFFFFFF;
DELIMITER = "\r\n";
}
/**
* 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 composite control which will be the parent of the new instance (cannot be null)
* @param style the style of control 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>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see SWT#SINGLE
* @see SWT#MULTI
* @see SWT#READ_ONLY
* @see SWT#WRAP
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see SWT#PASSWORD
* @see SWT#SEARCH
* @see SWT#ICON_SEARCH
* @see SWT#ICON_CANCEL
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Text (Composite parent, int style) {
super (parent, checkStyle (style));
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the receiver's text is modified, by sending
* it one of the messages defined in the <code>ModifyListener</code>
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</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>
*
* @see ModifyListener
* @see #removeModifyListener
*/
public void addModifyListener (ModifyListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Modify, typedListener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the control is selected by the user, by sending
* it one of the messages defined in the <code>SelectionListener</code>
* interface.
* <p>
* <code>widgetSelected</code> is not called for texts.
* <code>widgetDefaultSelected</code> is typically called when ENTER is pressed in a single-line text,
* or when ENTER is pressed in a search text. If the receiver has the <code>SWT.SEARCH | SWT.CANCEL</code> style
* and the user cancels the search, the event object detail field contains the value <code>SWT.CANCEL</code>.
* </p>
*
* @param listener the listener which should be notified when the control is selected by the user
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</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>
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener (SelectionListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Selection, typedListener);
addListener (SWT.DefaultSelection, typedListener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the receiver's text is verified, by sending
* it one of the messages defined in the <code>VerifyListener</code>
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</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>
*
* @see VerifyListener
* @see #removeVerifyListener
*/
public void addVerifyListener (VerifyListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Verify, typedListener);
}
/**
* Appends a string.
* <p>
* The new text is appended to the text at
* the end of the widget.
* </p>
*
* @param string the string to be appended
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</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 append (String string) {
checkWidget ();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
if ((style & SWT.PASSWORD) != 0) return;
OS.TextBox_SelectionStart (handle, getCharCount ());
if (hooks (SWT.Verify) || filters (SWT.Verify)) {
int start = OS.TextBox_SelectionStart (handle);
int end = start + OS.TextBox_SelectionLength (handle);
string = verifyText (string, start, end, false);
if (string == null) return;
}
int strPtr = createDotNetString (string, false);
OS.TextBoxBase_AppendText (handle, strPtr);
OS.TextBox_SelectionLength (handle, 0);
OS.GCHandle_Free (strPtr);
}
static int checkStyle (int style) {
if ((style & SWT.SEARCH) != 0) {
style |= SWT.SINGLE | SWT.BORDER;
style &= ~SWT.PASSWORD;
}
style &= ~SWT.SEARCH;
if ((style & SWT.SINGLE) != 0 && (style & SWT.MULTI) != 0) {
style &= ~SWT.MULTI;
}
style = checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
if ((style & SWT.SINGLE) != 0) style &= ~(SWT.H_SCROLL | SWT.V_SCROLL | SWT.WRAP);
if ((style & SWT.WRAP) != 0) {
style |= SWT.MULTI;
style &= ~SWT.H_SCROLL;
}
if ((style & SWT.MULTI) != 0) style &= ~SWT.PASSWORD;
if ((style & (SWT.SINGLE | SWT.MULTI)) != 0) return style;
if ((style & (SWT.H_SCROLL | SWT.V_SCROLL)) != 0) return style | SWT.MULTI;
return style | SWT.SINGLE;
}
/**
* Clears the selection.
*
* @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 clearSelection () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return;
int start = OS.TextBox_SelectionStart (handle);
int len = OS.TextBox_SelectionLength (handle);
OS.TextBox_SelectionStart (handle, start + len);
OS.TextBox_SelectionLength (handle, 0);
}
/**
* Copies the selected text.
* <p>
* The current selection is copied to the clipboard.
* </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 copy () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return;
OS.TextBoxBase_Copy (handle);
}
void createHandle () {
if ((style & SWT.PASSWORD) != 0) {
handle = OS.gcnew_PasswordBox ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
return;
}
handle = OS.gcnew_TextBox ();
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
if ((style & SWT.MULTI) != 0) {
OS.TextBoxBase_AcceptsReturn (handle, true);
OS.TextBoxBase_AcceptsTab (handle, true);
if ((style & SWT.WRAP) != 0) OS.TextBox_TextWrapping (handle, OS.TextWrapping_Wrap);
}
if ((style & SWT.BORDER) == 0) {
int thickness = OS.gcnew_Thickness (0, 0, 0, 0);
OS.Control_BorderThickness (handle, thickness);
OS.Control_Padding(handle, thickness);
OS.GCHandle_Free (thickness);
}
if ((style & SWT.READ_ONLY) != 0) OS.TextBoxBase_IsReadOnly (handle, true);
if ((style & SWT.CENTER) != 0) OS.Control_HorizontalContentAlignment (handle, OS.HorizontalAlignment_Center);
if ((style & SWT.RIGHT) != 0) OS.Control_HorizontalContentAlignment (handle, OS.HorizontalAlignment_Right);
if ((style & SWT.V_SCROLL) != 0) OS.TextBoxBase_VerticalScrollBarVisibility (handle, OS.ScrollBarVisibility_Visible);
if ((style & SWT.H_SCROLL) != 0) OS.TextBoxBase_HorizontalScrollBarVisibility (handle, OS.ScrollBarVisibility_Visible);
}
void createWidget () {
super.createWidget ();
doubleClick = true;
// setTabStops (8);
}
/**
* Cuts the selected text.
* <p>
* The current selection is first copied to the
* clipboard and then deleted from the widget.
* </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 cut () {
checkWidget ();
if ((style & SWT.READ_ONLY) != 0) return;
if ((style & SWT.PASSWORD) != 0) return;
OS.TextBoxBase_Cut (handle);
}
/**
* Returns the line number of the caret.
* <p>
* The line number of the caret is returned.
* </p>
*
* @return the line number
*
* @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 int getCaretLineNumber () {
checkWidget ();
if ((style & SWT.SINGLE) != 0) return 0;
if ((style & SWT.PASSWORD) != 0) return 0;
int caretIndex = OS.TextBox_CaretIndex (handle);
return OS.TextBox_GetLineIndexFromCharacterIndex (handle, caretIndex);
}
/**
* Returns a point describing the receiver's location relative
* to its parent (or its display if its parent is null).
* <p>
* The location of the caret is returned.
* </p>
*
* @return a point, the location of the caret
*
* @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 Point getCaretLocation () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return new Point (0, 0);
int caretIndex = OS.TextBox_CaretIndex (handle);
int rect = OS.TextBox_GetRectFromCharacterIndex (handle, caretIndex);
Point result = new Point ((int)OS.Rect_X (rect), (int)OS.Rect_Y (rect));
OS.GCHandle_Free (rect);
return result;
}
/**
* Returns the character position of the caret.
* <p>
* Indexing is zero based.
* </p>
*
* @return the position of the caret
*
* @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 int getCaretPosition () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return 0;
return OS.TextBox_CaretIndex (handle);
}
/**
* Returns the number of characters.
*
* @return number of characters in the widget
*
* @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 int getCharCount () {
checkWidget ();
int text;
if ((style & SWT.PASSWORD) != 0) {
text = OS.PasswordBox_Password (handle);
} else {
text = OS.TextBox_Text (handle);
}
int length = OS.String_Length (text);
OS.GCHandle_Free (text);
return length;
}
/**
* Returns the double click enabled flag.
* <p>
* The double click flag enables or disables the
* default action of the text widget when the user
* double clicks.
* </p>
*
* @return whether or not double click is enabled
*
* @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 boolean getDoubleClickEnabled () {
checkWidget ();
return doubleClick;
}
/**
* Returns the echo character.
* <p>
* The echo character is the character that is
* displayed when the user enters text or the
* text is changed by the programmer.
* </p>
*
* @return the echo character
*
* @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 #setEchoChar
*/
public char getEchoChar () {
checkWidget ();
if ((style & SWT.PASSWORD) == 0) return 0;
return OS.PasswordBox_PasswordChar (handle);
}
/**
* Returns the editable state.
*
* @return whether or not the receiver is editable
*
* @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 boolean getEditable () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return true;
return !OS.TextBoxBase_IsReadOnly (handle);
}
/**
* Returns the number of lines.
*
* @return the number of lines in the widget
*
* @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 int getLineCount () {
checkWidget ();
if ((style & SWT.SINGLE) != 0) return 1;
if ((style & SWT.PASSWORD) != 0) return 1;
int lines = OS.TextBox_LineCount (handle);
if (lines == -1) {
updateLayout (handle);
lines = OS.TextBox_LineCount (handle);
}
return lines;
}
/**
* Returns the line delimiter.
*
* @return a string that is the line delimiter
*
* @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 #DELIMITER
*/
public String getLineDelimiter () {
checkWidget ();
return DELIMITER;
}
/**
* Returns the height of a line.
*
* @return the height of a row of text
*
* @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 int getLineHeight () {
checkWidget ();
int family = OS.Control_FontFamily (handle);
double lineSpacing = OS.FontFamily_LineSpacing (family);
OS.GCHandle_Free (family);
double size = OS.Control_FontSize (handle);
return (int) (lineSpacing * size);
}
/**
* Returns the widget message. The message text is displayed
* as a hint for the user, indicating the purpose of the field.
* <p>
* Typically this is used in conjunction with <code>SWT.SEARCH</code>.
* </p>
*
* @return the widget message
*
* @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 3.3
*/
public String getMessage () {
checkWidget ();
return "";
}
/**
* Returns the orientation of the receiver, which will be one of the
* constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>.
*
* @return the orientation style
*
* @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 2.1.2
*/
public int getOrientation () {
checkWidget();
return style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT);
}
/**
* Returns a <code>Point</code> whose x coordinate is the
* character position representing the start of the selected
* text, and whose y coordinate is the character position
* representing the end of the selection. An "empty" selection
* is indicated by the x and y coordinates having the same value.
* <p>
* Indexing is zero based. The range of a selection is from
* 0..N where N is the number of characters in the widget.
* </p>
*
* @return a point representing the selection start and end
*
* @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 Point getSelection () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return new Point (0, 0);
int start = OS.TextBox_SelectionStart (handle);
int length = OS.TextBox_SelectionLength (handle);
return new Point (start, start+length);
}
/**
* Returns the number of selected characters.
*
* @return the number of selected characters.
*
* @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 int getSelectionCount () {
checkWidget ();
Point selection = getSelection ();
return selection.y - selection.x;
}
/**
* Gets the selected text, or an empty string if there is no current selection.
*
* @return the selected text
*
* @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 String getSelectionText () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return "";
int content = OS.TextBox_SelectedText (handle);
String string = createJavaString (content);
OS.GCHandle_Free (content);
return string;
}
/**
* Returns the number of tabs.
* <p>
* Tab stop spacing is specified in terms of the
* space (' ') character. The width of a single
* tab stop is the pixel width of the spaces.
* </p>
*
* @return the number of tab characters
*
* @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 int getTabs () {
checkWidget ();
//FIXME
return 8;
}
/**
* Returns the widget text.
* <p>
* The text for a text widget is the characters in the widget, or
* an empty string if this has never been set.
* </p>
*
* @return the widget text
*
* @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 String getText () {
checkWidget();
int text;
if ((style & SWT.PASSWORD) != 0) {
text = OS.PasswordBox_Password (handle);
} else {
text = OS.TextBox_Text (handle);
}
String string = createJavaString (text);
OS.GCHandle_Free (text);
return string;
}
/**
* Returns a range of text. Returns an empty string if the
* start of the range is greater than the end.
* <p>
* Indexing is zero based. The range of
* a selection is from 0..N-1 where N is
* the number of characters in the widget.
* </p>
*
* @param start the start of the range
* @param end the end of the range
* @return the range of text
*
* @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 String getText (int start, int end) {
checkWidget ();
if (!(start <= end && 0 <= end)) return "";
String text = getText ();
int length = text.length();
end = Math.min (end, length - 1);
if (start > end) return "";
start = Math.max (0, start);
/*
* NOTE: The current implementation uses substring ()
* which can reference a potentially large character
* array.
*/
return text.substring (start, end + 1);
}
/**
* Returns the maximum number of characters that the receiver is capable of holding.
* <p>
* If this has not been changed by <code>setTextLimit()</code>,
* it will be the constant <code>Text.LIMIT</code>.
* </p>
*
* @return the text limit
*
* @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 #LIMIT
*/
public int getTextLimit () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return OS.PasswordBox_MaxLength (handle);
return OS.TextBox_MaxLength (handle);
}
/**
* Returns the zero-relative index of the line which is currently
* at the top of the receiver.
* <p>
* This index can change when lines are scrolled or new lines are added or removed.
* </p>
*
* @return the index of the top line
*
* @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 int getTopIndex () {
checkWidget ();
if ((style & SWT.SINGLE) != 0) return 0;
if ((style & SWT.PASSWORD) != 0) return 0;
return OS.TextBox_GetFirstVisibleLineIndex (handle);
}
/**
* Returns the top pixel.
* <p>
* The top pixel is the pixel position of the line
* that is currently at the top of the widget. On
* some platforms, a text widget can be scrolled by
* pixels instead of lines so that a partial line
* is displayed at the top of the widget.
* </p><p>
* The top pixel changes when the widget is scrolled.
* The top pixel does not include the widget trimming.
* </p>
*
* @return the pixel position of the top line
*
* @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 int getTopPixel () {
checkWidget ();
int name = createDotNetString ("PART_ContentHost", false);
int template = OS.Control_Template (handle);
int scroller = OS.FrameworkTemplate_FindName (template, name, handle);
if (scroller == 0) {
updateLayout (handle);
scroller = OS.FrameworkTemplate_FindName (template, name, handle);
}
OS.GCHandle_Free (name);
OS.GCHandle_Free (template);
if (scroller == 0) return 0;
double vertOffset = OS.ScrollViewer_VerticalOffset (scroller);
OS.GCHandle_Free (scroller);
return (int) vertOffset;
}
void HandlePreviewKeyDown (int sender, int e) {
super.HandlePreviewKeyDown (sender, e);
if (!checkEvent (e)) return;
if ((style & SWT.SINGLE) != 0) {
int key = OS.KeyEventArgs_Key (e);
if (key == OS.Key_Return) postEvent (SWT.DefaultSelection);
}
}
void HandlePreviewExecutedRoutedEvent (int sender, int e) {
if (!checkEvent (e)) return;
int command = OS.ExecutedRoutedEventArgs_Command (e);
boolean doVerify = false;
String input = null;
int paste = OS.ApplicationCommands_Paste ();
int cut = OS.ApplicationCommands_Cut ();
int redo = OS.ApplicationCommands_Redo ();
int undo = OS.ApplicationCommands_Undo ();
int backspace = OS.EditingCommands_Backspace ();
int delete = OS.EditingCommands_Delete ();
int deleteNext = OS.EditingCommands_DeleteNextWord ();
int deletePrevious = OS.EditingCommands_DeletePreviousWord ();
if (OS.Object_Equals (command, paste)) {
doVerify = true;
int clipboardText = OS.Clipboard_GetText ();
input = createJavaString(clipboardText);
OS.GCHandle_Free(clipboardText);
} else if (OS.Object_Equals (command, cut)){
doVerify = true;
input = getSelectionText ();
} else if (OS.Object_Equals(command, redo)) {
//FIXME
//doVerify = true;
OS.ExecutedRoutedEventArgs_Handled (e, true);
} else if (OS.Object_Equals(command, undo)) {
//FIXME
//doVerify = true;
OS.ExecutedRoutedEventArgs_Handled (e, true);
} else if (OS.Object_Equals (command, backspace)) {
doVerify = true;
input = "";
} else if (OS.Object_Equals (command, delete)) {
doVerify = true;
input = "";
} else if (OS.Object_Equals(command, deleteNext)) {
//FIXME
//doVerify = true;
OS.ExecutedRoutedEventArgs_Handled (e, true);
} else if (OS.Object_Equals(command, deletePrevious)) {
//FIXME
//doVerify = true;
OS.ExecutedRoutedEventArgs_Handled (e, true);
}
OS.GCHandle_Free (paste);
OS.GCHandle_Free (cut);
OS.GCHandle_Free (redo);
OS.GCHandle_Free (undo);
OS.GCHandle_Free (backspace);
OS.GCHandle_Free (delete);
OS.GCHandle_Free (deleteNext);
OS.GCHandle_Free (deletePrevious);
OS.GCHandle_Free (command);
/*
* FIXME - should do this first, but for now we want to swallow
* all Redo, Undo, DeleteNextWord and DeletePreviousWord to
* prevent those from changing the TextBox w/o Verify events
*/
if (!hooks (SWT.Verify)) return;
if (!doVerify) return;
int start = OS.TextBox_SelectionStart (handle);
int end = start + OS.TextBox_SelectionLength (handle);
String text = verifyText (input, start, end, true);
if (text != null && !text.equals (input)) {
int strPtr = createDotNetString (text, false);
OS.TextBox_SelectedText (handle, strPtr);
OS.GCHandle_Free (strPtr);
start = OS.TextBox_SelectionStart (handle);
int length = OS.TextBox_SelectionLength (handle);
OS.TextBox_Select (handle, start+length, 0);
OS.TextBox_SelectionLength (handle, 0);
text = null;
}
if (text == null) OS.ExecutedRoutedEventArgs_Handled (e, true);
}
void HandlePreviewTextInput (int sender, int e) {
super.HandlePreviewTextInput (sender, e);
if (!checkEvent (e)) return;
if ((style & SWT.PASSWORD) != 0) return;
int textPtr = OS.TextCompositionEventArgs_Text (e);
String input = createJavaString(textPtr);
OS.GCHandle_Free (textPtr);
int start = OS.TextBox_SelectionStart (handle);
int end = start + OS.TextBox_SelectionLength (handle);
String text = verifyText (input, start, end, true);
if (text != null && !text.equals (input)) {
textPtr = createDotNetString (text, false);
OS.TextBox_SelectedText (handle, textPtr);
OS.GCHandle_Free (textPtr);
start = OS.TextBox_SelectionStart (handle);
int length = OS.TextBox_SelectionLength (handle);
OS.TextBox_Select (handle, start+length, 0);
OS.TextBox_SelectionLength (handle, 0);
text = null;
}
if (text == null) OS.TextCompositionEventArgs_Handled (e, true);
}
void HandleTextChanged (int sender, int e) {
if (!checkEvent (e)) return;
sendEvent (SWT.Modify);
}
void hookEvents () {
super.hookEvents();
if ((style & SWT.PASSWORD) != 0) {
int handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleTextChanged");
if (handler == 0) error (SWT.ERROR_NO_HANDLES);
OS.PasswordBox_PasswordChanged (handle, handler);
OS.GCHandle_Free(handler);
return;
}
int handler = OS.gcnew_ExecutedRoutedEventHandler (jniRef, "HandlePreviewExecutedRoutedEvent");
if (handler == 0) error (SWT.ERROR_NO_HANDLES);
OS.CommandManager_AddPreviewExecutedHandler (handle, handler);
OS.GCHandle_Free (handler);
handler = OS.gcnew_TextChangedEventHandler (jniRef, "HandleTextChanged");
if (handler == 0) error (SWT.ERROR_NO_HANDLES);
OS.TextBoxBase_TextChanged (handle, handler);
OS.GCHandle_Free (handler);
}
/**
* Inserts a string.
* <p>
* The old selection is replaced with the new text.
* </p>
*
* @param string the string
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is <code>null</code></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 insert (String string) {
checkWidget ();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
if ((style & SWT.PASSWORD) != 0) return;
if (hooks (SWT.Verify) || filters (SWT.Verify)) {
int start = OS.TextBox_SelectionStart (handle);
string = verifyText (string, start, start, false);
if (string == null) return;
}
int strPtr = createDotNetString (string, false);
OS.TextBox_SelectionLength (handle, 0);
OS.TextBox_SelectedText (handle, strPtr);
OS.GCHandle_Free (strPtr);
int end = OS.TextBox_SelectionStart (handle) + OS.TextBox_SelectionLength (handle);
OS.TextBox_Select (handle, end, 0);
}
/**
* Pastes text from clipboard.
* <p>
* The selected text is deleted from the widget
* and new text inserted from the clipboard.
* </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 paste () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) {
OS.PasswordBox_Paste (handle);
return;
}
OS.TextBoxBase_Paste (handle);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the receiver's text is modified.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</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>
*
* @see ModifyListener
* @see #addModifyListener
*/
public void removeModifyListener (ModifyListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Modify, listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is selected by the user.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</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>
*
* @see SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener (SelectionListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Selection, listener);
eventTable.unhook (SWT.DefaultSelection,listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is verified.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</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>
*
* @see VerifyListener
* @see #addVerifyListener
*/
public void removeVerifyListener (VerifyListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Verify, listener);
}
/**
* Selects all the text in the receiver.
*
* @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 selectAll () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return;
OS.TextBoxBase_SelectAll (handle);
}
/**
* Sets the double click enabled flag.
* <p>
* The double click flag enables or disables the
* default action of the text widget when the user
* double clicks.
* </p><p>
* Note: This operation is a hint and is not supported on
* platforms that do not have this concept.
* </p>
*
* @param doubleClick the new double click flag
*
* @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 setDoubleClickEnabled (boolean doubleClick) {
checkWidget ();
this.doubleClick = doubleClick;
}
/**
* Sets the echo character.
* <p>
* The echo character is the character that is
* displayed when the user enters text or the
* text is changed by the programmer. Setting
* the echo character to '\0' clears the echo
* character and redraws the original text.
* If for any reason the echo character is invalid,
* or if the platform does not allow modification
* of the echo character, the default echo character
* for the platform is used.
* </p>
*
* @param echo the new echo character
*
* @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 setEchoChar (char echo) {
checkWidget ();
if ((style & SWT.PASSWORD) == 0) return;
OS.PasswordBox_PasswordChar (handle, echo);
}
/**
* Sets the editable state.
*
* @param editable the new editable 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>
*/
public void setEditable (boolean editable) {
checkWidget ();
style &= ~SWT.READ_ONLY;
if (!editable) style |= SWT.READ_ONLY;
if ((style & SWT.PASSWORD) != 0) return;
OS.TextBoxBase_IsReadOnly (handle, !editable);
}
void setFont (int font, double size) {
super.setFont (font, size);
//FIXME
// setTabStops (tabs);
}
/**
* Sets the widget message. The message text is displayed
* as a hint for the user, indicating the purpose of the field.
* <p>
* Typically this is used in conjunction with <code>SWT.SEARCH</code>.
* </p>
*
* @param message the new message
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the message is null</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 3.3
*/
public void setMessage (String message) {
checkWidget ();
if (message == null) error (SWT.ERROR_NULL_ARGUMENT);
//TODO
}
/**
* Sets the orientation of the receiver, which must be one
* of the constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>.
* <p>
* Note: This operation is a hint and is not supported on
* platforms that do not have this concept.
* </p>
*
* @param orientation new orientation style
*
* @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 2.1.2
*/
public void setOrientation (int orientation) {
checkWidget();
int flags = SWT.RIGHT_TO_LEFT | SWT.LEFT_TO_RIGHT;
if ((orientation & flags) == 0 || (orientation & flags) == flags) return;
style &= ~flags;
style |= orientation & flags;
//FIXME FrameworkElement.FlowDirection ??
}
/**
* Sets the selection.
* <p>
* Indexing is zero based. The range of
* a selection is from 0..N where N is
* the number of characters in the widget.
* </p><p>
* Text selections are specified in terms of
* caret positions. In a text widget that
* contains N characters, there are N+1 caret
* positions, ranging from 0..N. This differs
* from other functions that address character
* position such as getText () that use the
* regular array indexing rules.
* </p>
*
* @param start new caret position
*
* @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 setSelection (int start) {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return;
OS.TextBox_CaretIndex (handle, start);
}
/**
* Sets the selection to the range specified
* by the given start and end indices.
* <p>
* Indexing is zero based. The range of
* a selection is from 0..N where N is
* the number of characters in the widget.
* </p><p>
* Text selections are specified in terms of
* caret positions. In a text widget that
* contains N characters, there are N+1 caret
* positions, ranging from 0..N. This differs
* from other functions that address character
* position such as getText () that use the
* usual array indexing rules.
* </p>
*
* @param start the start of the range
* @param end the end of the range
*
* @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 setSelection (int start, int end) {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return;
int first = Math.max (Math.min (start, end), 0);
int last = Math.min (Math.max (start, end), getCharCount ());
OS.TextBox_Select (handle, first, last-first);
}
/**
* Sets the selection to the range specified
* by the given point, where the x coordinate
* represents the start index and the y coordinate
* represents the end index.
* <p>
* Indexing is zero based. The range of
* a selection is from 0..N where N is
* the number of characters in the widget.
* </p><p>
* Text selections are specified in terms of
* caret positions. In a text widget that
* contains N characters, there are N+1 caret
* positions, ranging from 0..N. This differs
* from other functions that address character
* position such as getText () that use the
* usual array indexing rules.
* </p>
*
* @param selection the point
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the point is null</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 setSelection (Point selection) {
checkWidget ();
if (selection == null) error (SWT.ERROR_NULL_ARGUMENT);
setSelection (selection.x, selection.y);
}
/**
* Sets the number of tabs.
* <p>
* Tab stop spacing is specified in terms of the
* space (' ') character. The width of a single
* tab stop is the pixel width of the spaces.
* </p>
*
* @param tabs the number of tabs
*
* </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 setTabs (int tabs) {
checkWidget ();
if (tabs < 0) return;
//FIXME - no equivalent API in WPF TextBox
// setTabStops (this.tabs = tabs);
}
/**
* Sets the contents of the receiver to the given string. If the receiver has style
* SINGLE and the argument contains multiple lines of text, the result of this
* operation is undefined and may vary from platform to platform.
*
* @param string the new text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</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 setText (String string) {
checkWidget ();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
if (hooks (SWT.Verify) || filters (SWT.Verify)) {
string = verifyText (string, 0, getCharCount (), false);
if (string == null) return;
}
int ptr = createDotNetString (string, false);
if ((style & SWT.PASSWORD) != 0) {
OS.PasswordBox_Password (handle, ptr);
} else {
OS.TextBox_Text (handle, ptr);
}
OS.GCHandle_Free (ptr);
}
/**
* Sets the maximum number of characters that the receiver
* is capable of holding to be the argument.
* <p>
* Instead of trying to set the text limit to zero, consider
* creating a read-only text widget.
* </p><p>
* To reset this value to the default, use <code>setTextLimit(Text.LIMIT)</code>.
* Specifying a limit value larger than <code>Text.LIMIT</code> sets the
* receiver's limit to <code>Text.LIMIT</code>.
* </p>
*
* @param limit new text limit
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_CANNOT_BE_ZERO - if the limit is zero</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>
*
* @see #LIMIT
*/
public void setTextLimit (int limit) {
checkWidget ();
if (limit == 0) error (SWT.ERROR_CANNOT_BE_ZERO);
if (limit < 0) limit = LIMIT;
limit = Math.min (limit, LIMIT);
if ((style & SWT.PASSWORD) != 0) {
OS.PasswordBox_MaxLength (handle, limit);
} else {
OS.TextBox_MaxLength (handle, limit);
}
}
/**
* Sets the zero-relative index of the line which is currently
* at the top of the receiver. This index can change when lines
* are scrolled or new lines are added and removed.
*
* @param index the index of the top item
*
* @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 setTopIndex (int index) {
checkWidget ();
if ((style & SWT.SINGLE) != 0) return;
if ((style & SWT.PASSWORD) != 0) return;
int count = OS.TextBox_LineCount (handle);
if (count == -1) {
updateLayout (handle);
count = OS.TextBox_LineCount (handle);
}
index = Math.max(0, Math.min (index, count-1));
int family = OS.Control_FontFamily (handle);
double lineSpacing = OS.FontFamily_LineSpacing (family);
OS.GCHandle_Free (family);
double size = OS.Control_FontSize (handle);
double lineHeight = lineSpacing * size;
int name = createDotNetString ("PART_ContentHost", false);
int template = OS.Control_Template (handle);
int scroller = OS.FrameworkTemplate_FindName (template, name, handle);
OS.GCHandle_Free (name);
OS.GCHandle_Free (template);
if (scroller == 0) return;
double vertOffset = index*lineHeight;
OS.ScrollViewer_ScrollToVerticalOffset (scroller, vertOffset);
OS.GCHandle_Free (scroller);
updateLayout(handle);
}
/**
* Shows the selection.
* <p>
* If the selection is already showing
* in the receiver, this method simply returns. Otherwise,
* lines are scrolled until the selection is visible.
* </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 showSelection () {
checkWidget ();
if ((style & SWT.PASSWORD) != 0) return;
double offset = OS.TextBoxBase_VerticalOffset (handle);
OS.TextBoxBase_ScrollToVerticalOffset (handle, offset);
}
int traversalCode (int key, int event) {
int bits = super.traversalCode (key, event);
if ((style & SWT.READ_ONLY) != 0) return bits;
if ((style & SWT.MULTI) != 0) {
bits &= ~SWT.TRAVERSE_RETURN;
if (key == OS.Key_Tab && event != 0) {
int keyboardDevice = OS.KeyboardEventArgs_KeyboardDevice(event);
int modifiers = OS.KeyboardDevice_Modifiers(keyboardDevice);
OS.GCHandle_Free(keyboardDevice);
boolean next = (modifiers & OS.ModifierKeys_Shift) == 0;
if (next && (modifiers & OS.ModifierKeys_Control) == 0) {
bits &= ~(SWT.TRAVERSE_TAB_NEXT | SWT.TRAVERSE_TAB_PREVIOUS);
}
}
}
return bits;
}
String verifyText (String string, int start, int end, boolean keyEvent) {
Event event = new Event ();
event.text = string;
event.start = start;
event.end = end;
if (keyEvent && string.length () == 1) {
event.character = string.charAt (0);
setInputState (event, SWT.KeyDown, 0, 0);
}
/*
* It is possible (but unlikely), that application
* code could have disposed the widget in the verify
* event. If this happens, answer null to cancel
* the operation.
*/
sendEvent (SWT.Verify, event);
if (!event.doit || isDisposed ()) return null;
return event.text;
}
}
|