File: qptrlist.doc

package info (click to toggle)
qt-x11-free 3:3.3.8b-7
  • links: PTS, VCS
  • area: main
  • in suites: squeeze
  • size: 82,260 kB
  • ctags: 72,611
  • sloc: cpp: 456,781; ansic: 129,082; sh: 11,455; yacc: 2,947; xml: 766; makefile: 566; perl: 495; lex: 458; sql: 29; lisp: 13
file content (1259 lines) | stat: -rw-r--r-- 36,806 bytes parent folder | download | duplicates (2)
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
/****************************************************************************
**
** QPtrList and QPtrListIterator class documentation
**
** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file.  Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/


/*****************************************************************************
  QPtrList documentation
 *****************************************************************************/

/*!
    \class QPtrList
    \brief The QPtrList class is a template class that provides a list.

    \ingroup collection
    \ingroup tools

    \important autoDelete setAutoDelete

    QValueList is an STL-compatible alternative to this class.

    Define a template instance QPtrList\<X\> to create a list that
    operates on pointers to X (X*).

    The list class is indexable and has a \link at() current
    index\endlink and a \link current() current item\endlink. The
    first item corresponds to index position 0. The current index is
    -1 if the current item is 0.

    Items are inserted with prepend(), insert() or append(). Items are
    removed with remove(), removeRef(), removeFirst() and
    removeLast(). You can search for an item using find(), findNext(),
    findRef() or findNextRef(). The list can be sorted with sort().
    You can count the number of occurrences of an item with contains()
    or containsRef(). You can get a pointer to the current item with
    current(), to an item at a particular index position in the list
    with at() or to the first or last item with getFirst() and
    getLast(). You can also iterate over the list with first(),
    last(), next() and prev() (which all update current()). The list's
    deletion property is set with setAutoDelete().

    \target example
    Example:
    \code
    class Employee
    {
    public:
	Employee() : sn( 0 ) { }
	Employee( const QString& forename, const QString& surname, int salary )
	    : fn( forename ), sn( surname ), sal( salary )
	{ }

	void setSalary( int salary ) { sal = salary; }

	QString forename() const { return fn; }
	QString surname() const { return sn; }
	int salary() const { return sal; }

    private:
	QString fn;
	QString sn;
	int sal;
    };

    QPtrList<Employee> list;
    list.setAutoDelete( TRUE ); // the list owns the objects

    list.append( new Employee("John", "Doe", 50000) );
    list.append( new Employee("Jane", "Williams", 80000) );
    list.append( new Employee("Tom", "Jones", 60000) );

    Employee *employee;
    for ( employee = list.first(); employee; employee = list.next() )
	cout << employee->surname().latin1() << ", " <<
		employee->forename().latin1() << " earns " <<
		employee->salary() << endl;
    cout << endl;

    // very inefficient for big lists
    for ( uint i = 0; i < list.count(); ++i )
	if ( list.at(i) )
	    cout << list.at( i )->surname().latin1() << endl;
    \endcode

    The output is
    \code
    Doe, John earns 50000
    Williams, Jane earns 80000
    Jones, Tom earns 60000

    Doe
    Williams
    Jones
    \endcode

    QPtrList has several member functions for traversing the list, but
    using a QPtrListIterator can be more practical. Multiple list
    iterators may traverse the same list, independently of each other
    and of the current list item.

    In the example above we make the call setAutoDelete(TRUE).
    Enabling auto-deletion tells the list to delete items that are
    removed. The default is to not delete items when they are removed
    but this would cause a memory leak in the example because there
    are no other references to the list items.

    When inserting an item into a list only the pointer is copied, not
    the item itself, i.e. a shallow copy. It is possible to make the
    list copy all of the item's data (deep copy) when an item is
    inserted. insert(), inSort() and append() call the virtual
    function QPtrCollection::newItem() for the item to be inserted.
    Inherit a list and reimplement newItem() to have deep copies.

    When removing an item from a list, the virtual function
    QPtrCollection::deleteItem() is called. QPtrList's default
    implementation is to delete the item if auto-deletion is enabled.

    The virtual function compareItems() can be reimplemented to
    compare two list items. This function is called from all list
    functions that need to compare list items, for instance
    remove(const type*). If you only want to deal with pointers, there
    are functions that compare pointers instead, for instance
    removeRef(const type*). These functions are somewhat faster than
    those that call compareItems().

    List items are stored as \c void* in an internal QLNode, which
    also holds pointers to the next and previous list items. The
    functions currentNode(), removeNode(), and takeNode() operate
    directly on the QLNode, but they should be used with care. The
    data component of the node is available through QLNode::getData().

    The QStrList class defined in \l qstrlist.h is a list of \c char*.
    It reimplements newItem(), deleteItem() and compareItems(). (But
    see QStringList for a list of Unicode QStrings.)

    \sa QPtrListIterator
*/


/*!
    \fn QPtrList::QPtrList()

    Constructs an empty list.
*/

/*!
    \fn QPtrList::QPtrList( const QPtrList<type> &list )

    Constructs a copy of \a list.

    Each item in \a list is \link append() appended\endlink to this
    list. Only the pointers are copied (shallow copy).
*/

/*!
    \fn QPtrList::~QPtrList()

    Removes all items from the list and destroys the list.

    All list iterators that access this list will be reset.

    \sa setAutoDelete()
*/

/*!
    \fn QPtrList<type> &QPtrList::operator=(const QPtrList<type> &list)

    Assigns \a list to this list and returns a reference to this list.

    This list is first cleared and then each item in \a list is \link
    append() appended\endlink to this list. Only the pointers are
    copied (shallow copy) unless newItem() has been reimplemented.
*/

/*!
    \fn bool QPtrList::operator==(const QPtrList<type> &list ) const

    Compares this list with \a list. Returns TRUE if the lists contain
    the same data; otherwise returns FALSE.
*/

/*!
    \fn uint QPtrList::count() const

    Returns the number of items in the list.

    \sa isEmpty()
*/

/*!
    \fn bool QPtrList::operator!=(const QPtrList<type> &list ) const

    Compares this list with \a list. Returns TRUE if the lists contain
    different data; otherwise returns FALSE.
*/


/*!
    \fn void QPtrList::sort()

    Sorts the list by the result of the virtual compareItems()
    function.

    The heap sort algorithm is used for sorting. It sorts n items with
    O(n*log n) comparisons. This is the asymptotic optimal solution of
    the sorting problem.

    If the items in your list support operator<() and operator==(),
    you might be better off with QSortedList because it implements the
    compareItems() function for you using these two operators.

    \sa inSort()
*/

/*!
    \fn bool QPtrList::isEmpty() const

    Returns TRUE if the list is empty; otherwise returns FALSE.

    \sa count()
*/

/*!
    \fn bool QPtrList::insert( uint index, const type *item )

    Inserts the \a item at position \a index in the list.

    Returns TRUE if successful, i.e. if \a index is in range;
    otherwise returns FALSE. The valid range is 0 to count()
    (inclusively). The item is appended if \a index == count().

    The inserted item becomes the current list item.

    \a item must not be 0.

    \sa append(), current(), replace()
*/

/*!
    \fn bool QPtrList::replace( uint index, const type *item )

    Replaces the item at position \a index with the new \a item. 

    Returns TRUE if successful, i.e. \a index is in the range 0 to
    count()-1.

    \sa append(), current(), insert()
*/

/*!
    \fn void QPtrList::inSort( const type *item )

    Inserts the \a item at its sorted position in the list.

    The sort order depends on the virtual compareItems() function. All
    items must be inserted with inSort() to maintain the sorting
    order.

    The inserted item becomes the current list item.

    \a item must not be 0.

    \warning Using inSort() is slow. An alternative, especially if you
    have lots of items, is to simply append() or insert() them and
    then use sort(). inSort() takes up to O(n) compares. That means
    inserting n items in your list will need O(n^2) compares whereas
    sort() only needs O(n*log n) for the same task. So use inSort()
    only if you already have a presorted list and want to insert just
    a few additional items.

    \sa insert(), compareItems(), current(), sort()
*/

/*!
    \fn void QPtrList::append( const type *item )

    Inserts the \a item at the end of the list.

    The inserted item becomes the current list item. This is
    equivalent to \c{insert( count(), item )}.

    \a item must not be 0.

    \sa insert(), current(), prepend()
*/

/*!
    \fn void QPtrList::prepend( const type *item )

    Inserts the \a item at the start of the list.

    The inserted item becomes the current list item. This is
    equivalent to \c{insert( 0, item )}.

    \a item must not be 0.

    \sa append(), insert(), current()
*/

/*!
    \fn bool QPtrList::remove( uint index )

    Removes the item at position \a index in the list.

    Returns TRUE if successful, i.e. if \a index is in range;
    otherwise returns FALSE. The valid range is \c{0..(count() - 1)}
    inclusive.

    The removed item is deleted if \link setAutoDelete()
    auto-deletion\endlink is enabled.

    The item after the removed item becomes the new current list item
    if the removed item is not the last item in the list. If the last
    item is removed, the new last item becomes the current item.

    All list iterators that refer to the removed item will be set to
    point to the new current item.

    \sa take(), clear(), setAutoDelete(), current() removeRef()
*/

/*!
    \fn bool QPtrList::remove()

    \overload

    Removes the current list item.

    Returns TRUE if successful, i.e. if the current item isn't 0;
    otherwise returns FALSE.

    The removed item is deleted if \link setAutoDelete()
    auto-deletion\endlink is enabled.

    The item after the removed item becomes the new current list item
    if the removed item is not the last item in the list. If the last
    item is removed, the new last item becomes the current item. The
    current item is set to 0 if the list becomes empty.

    All list iterators that refer to the removed item will be set to
    point to the new current item.

    \sa take(), clear(), setAutoDelete(), current() removeRef()
*/

/*!
    \fn bool QPtrList::remove( const type *item )

    \overload

    Removes the first occurrence of \a item from the list.

    Returns TRUE if successful, i.e. if \a item is in the list;
    otherwise returns FALSE.

    The removed item is deleted if \link setAutoDelete()
    auto-deletion\endlink is enabled.

    The compareItems() function is called when searching for the item
    in the list. If compareItems() is not reimplemented, it is more
    efficient to call removeRef().

    If \a item is NULL then the current item is removed from the list.

    The item after the removed item becomes the new current list item
    if the removed item is not the last item in the list. If the last
    item is removed, the new last item becomes the current item. The
    current item is set to 0 if the list becomes empty.

    All list iterators that refer to the removed item will be set to
    point to the new current item.

    \sa removeRef(), take(), clear(), setAutoDelete(), compareItems(),
    current()
*/

/*!
    \fn bool QPtrList::removeRef( const type *item )

    Removes the first occurrence of \a item from the list.

    Returns TRUE if successful, i.e. if \a item is in the list;
    otherwise returns FALSE.

    The removed item is deleted if \link setAutoDelete()
    auto-deletion\endlink is enabled.

    Equivalent to:
    \code
	if ( list.findRef( item ) != -1 )
	    list.remove();
    \endcode

    The item after the removed item becomes the new current list item
    if the removed item is not the last item in the list. If the last
    item is removed, the new last item becomes the current item. The
    current item is set to 0 if the list becomes empty.

    All list iterators that refer to the removed item will be set to
    point to the new current item.

    \sa remove(), clear(), setAutoDelete(), current()
*/

/*!
    \fn void QPtrList::removeNode( QLNode *node )

    Removes the \a node from the list.

    This node must exist in the list, otherwise the program may crash.

    The removed item is deleted if \link setAutoDelete()
    auto-deletion\endlink is enabled.

    The first item in the list will become the new current list item.
    The current item is set to 0 if the list becomes empty.

    All list iterators that refer to the removed item will be set to
    point to the item succeeding this item or to the preceding item if
    the removed item was the last item.

    \warning Do not call this function unless you are an expert.

    \sa takeNode(), currentNode() remove() removeRef()
*/

/*!
    \fn bool QPtrList::removeFirst()

    Removes the first item from the list. Returns TRUE if successful,
    i.e. if the list isn't empty; otherwise returns FALSE.

    The removed item is deleted if \link setAutoDelete()
    auto-deletion\endlink is enabled.

    The first item in the list becomes the new current list item. The
    current item is set to 0 if the list becomes empty.

    All list iterators that refer to the removed item will be set to
    point to the new current item.

    \sa removeLast(), setAutoDelete(), current() remove()
*/

/*!
    \fn bool QPtrList::removeLast()

    Removes the last item from the list. Returns TRUE if successful,
    i.e. if the list isn't empty; otherwise returns FALSE.

    The removed item is deleted if \link setAutoDelete()
    auto-deletion\endlink is enabled.

    The last item in the list becomes the new current list item. The
    current item is set to 0 if the list becomes empty.

    All list iterators that refer to the removed item will be set to
    point to the new current item.

    \sa removeFirst(), setAutoDelete(), current()
*/

/*!
    \fn type *QPtrList::take( uint index )

    Takes the item at position \a index out of the list without
    deleting it (even if \link setAutoDelete() auto-deletion\endlink
    is enabled).

    Returns a pointer to the item taken out of the list, or 0 if the
    index is out of range. The valid range is \c{0..(count() - 1)}
    inclusive.

    The item after the removed item becomes the new current list item
    if the removed item is not the last item in the list. If the last
    item is removed, the new last item becomes the current item. The
    current item is set to 0 if the list becomes empty.

    All list iterators that refer to the taken item will be set to
    point to the new current item.

    \sa remove(), clear(), current()
*/

/*!
    \fn type *QPtrList::take()

    \overload

    Takes the current item out of the list without deleting it (even
    if \link setAutoDelete() auto-deletion\endlink is enabled).

    Returns a pointer to the item taken out of the list, or 0 if
    the current item is 0.

    The item after the removed item becomes the new current list item
    if the removed item is not the last item in the list. If the last
    item is removed, the new last item becomes the current item. The
    current item is set to 0 if the list becomes empty.

    All list iterators that refer to the taken item will be set to
    point to the new current item.

    \sa remove(), clear(), current()
*/

/*!
    \fn type *QPtrList::takeNode( QLNode *node )

    Takes the \a node out of the list without deleting its item (even
    if \link setAutoDelete() auto-deletion\endlink is enabled).
    Returns a pointer to the item taken out of the list.

    This node must exist in the list, otherwise the program may crash.

    The first item in the list becomes the new current list item.

    All list iterators that refer to the taken item will be set to
    point to the item succeeding this item or to the preceding item if
    the taken item was the last item.

    \warning Do not call this function unless you are an expert.

    \sa removeNode(), currentNode()
*/

/*!
    \fn void QPtrList::clear()

    Removes all items from the list.

    The removed items are deleted if \link setAutoDelete()
    auto-deletion\endlink is enabled.

    All list iterators that access this list will be reset.

    \sa remove(), take(), setAutoDelete()
*/

/*!
    \fn int QPtrList::find( const type *item )

    Finds the first occurrence of \a item in the list.

    If the item is found, the list sets the current item to point to
    the found item and returns the index of this item. If the item is
    not found, the list sets the current item to 0, the current
    index to -1, and returns -1.

    The compareItems() function is called when searching for the item
    in the list. If compareItems() is not reimplemented, it is more
    efficient to call findRef().

    \sa findNext(), findRef(), compareItems(), current()
*/

/*!
    \fn int QPtrList::findNext( const type *item )

    Finds the next occurrence of \a item in the list, starting from
    the current list item.

    If the item is found, the list sets the current item to point to
    the found item and returns the index of this item. If the item is
    not found, the list sets the current item to 0, the current
    index to -1, and returns -1.

    The compareItems() function is called when searching for the item
    in the list. If compareItems() is not reimplemented, it is more
    efficient to call findNextRef().

    \sa find(), findNextRef(), compareItems(), current()
*/

/*!
    \fn int QPtrList::findRef( const type *item )

    Finds the first occurrence of \a item in the list.

    If the item is found, the list sets the current item to point to
    the found item and returns the index of this item. If the item is
    not found, the list sets the current item to 0, the current
    index to -1, and returns -1.

    Calling this function is much faster than find() because find()
    compares \a item with each list item using compareItems(), whereas
    this function only compares the pointers.

    \sa findNextRef(), find(), current()
*/

/*!
    \fn int QPtrList::findNextRef( const type *item )

    Finds the next occurrence of \a item in the list, starting from
    the current list item.

    If the item is found, the list sets the current item to point to
    the found item and returns the index of this item. If the item is
    not found, the list sets the current item to 0, the current
    index to -1, and returns -1.

    Calling this function is much faster than findNext() because
    findNext() compares \a item with each list item using
    compareItems(), whereas this function only compares the pointers.

    \sa findRef(), findNext(), current()
*/

/*!
    \fn uint QPtrList::contains( const type *item ) const

    Returns the number of occurrences of \a item in the list.

    The compareItems() function is called when looking for the \a item
    in the list. If compareItems() is not reimplemented, it is more
    efficient to call containsRef().

    This function does not affect the current list item.

    \sa containsRef(), compareItems()
*/

/*!
    \fn uint QPtrList::containsRef( const type *item ) const

    Returns the number of occurrences of \a item in the list.

    Calling this function is much faster than contains() because
    contains() compares \a item with each list item using
    compareItems(), whereas his function only compares the pointers.

    This function does not affect the current list item.

    \sa contains()
*/

/*!
    \fn type *QPtrList::at( uint index )

    Returns a pointer to the item at position \a index in the list, or
    0 if the index is out of range.

    Sets the current list item to this item if \a index is valid. The
    valid range is \c{0..(count() - 1)} inclusive.

    This function is very efficient. It starts scanning from the first
    item, last item, or current item, whichever is closest to \a
    index.

    \sa current()
*/

/*!
    \fn int QPtrList::at() const

    \overload

    Returns the index of the current list item. The returned value is
    -1 if the current item is 0.

    \sa current()
*/

/*!
    \fn type *QPtrList::current() const

    Returns a pointer to the current list item. The current item may
    be 0 (implies that the current index is -1). 

    \sa at()
*/

/*!
    \fn QLNode *QPtrList::currentNode() const

    Returns a pointer to the current list node.

    The node can be kept and removed later using removeNode(). The
    advantage is that the item can be removed directly without
    searching the list.

    \warning Do not call this function unless you are an expert.

    \sa removeNode(), takeNode(), current()
*/

/*!
    \fn type *QPtrList::getFirst() const

    Returns a pointer to the first item in the list, or 0 if the list
    is empty.

    This function does not affect the current list item.

    \sa first(), getLast()
*/

/*!
    \fn type *QPtrList::getLast() const

    Returns a pointer to the last item in the list, or 0 if the list
    is empty.

    This function does not affect the current list item.

    \sa last(), getFirst()
*/

/*!
    \fn type *QPtrList::first()

    Returns a pointer to the first item in the list and makes this the
    current list item; returns 0 if the list is empty.

    \sa getFirst(), last(), next(), prev(), current()
*/

/*!
    \fn type *QPtrList::last()

    Returns a pointer to the last item in the list and makes this the
    current list item; returns 0 if the list is empty.

    \sa getLast(), first(), next(), prev(), current()
*/

/*!
    \fn type *QPtrList::next()

    Returns a pointer to the item succeeding the current item. Returns
    0 if the current item is 0 or equal to the last item.

    Makes the succeeding item current. If the current item before this
    function call was the last item, the current item will be set to
    0. If the current item was 0, this function does nothing.

    \sa first(), last(), prev(), current()
*/

/*!
    \fn type *QPtrList::prev()

    Returns a pointer to the item preceding the current item. Returns
    0 if the current item is 0 or equal to the first item.

    Makes the preceding item current. If the current item before this
    function call was the first item, the current item will be set to
    0. If the current item was 0, this function does nothing.

    \sa first(), last(), next(), current()
*/

/*!
    \fn void QPtrList::toVector( QGVector *vec ) const

    Stores all list items in the vector \a vec.

    The vector must be of the same item type, otherwise the result
    will be undefined.
*/

/*!
    \enum QPtrList::iterator

    \internal
*/

/*!
    \enum QPtrList::Iterator

    \internal
*/

/*!
    \enum QPtrList::ConstIterator

    \internal
*/

/*!
    \enum QPtrList::const_iterator

    \internal
*/

/*!
    \fn QPtrList::constBegin() const

    \internal
*/

/*!
    \fn QPtrList::constEnd() const

    \internal
*/

/*!
    \fn QPtrList::erase(Iterator)

    \internal
*/


/*****************************************************************************
  QPtrListIterator documentation
 *****************************************************************************/

/*!
    \class QPtrListIterator
    \brief The QPtrListIterator class provides an iterator for
    QPtrList collections.

    \ingroup collection
    \ingroup tools

    Define a template instance QPtrListIterator\<X\> to create a list
    iterator that operates on QPtrList\<X\> (list of X*).

    The following example is similar to the \link
    qptrlist.html#example example in the QPtrList class documentation
    \endlink, but it uses QPtrListIterator. The class Employee is
    defined there.

    \code
    QPtrList<Employee> list;

    list.append( new Employee("John", "Doe", 50000) );
    list.append( new Employee("Jane", "Williams", 80000) );
    list.append( new Employee("Tom", "Jones", 60000) );

    QPtrListIterator<Employee> it( list );
    Employee *employee;
    while ( (employee = it.current()) != 0 ) {
	++it;
	cout << employee->surname().latin1() << ", " <<
		employee->forename().latin1() << " earns " <<
		employee->salary() << endl;
    }
    \endcode

    The output is
    \code
    Doe, John earns 50000
    Williams, Jane earns 80000
    Jones, Tom earns 60000
    \endcode

    Using a list iterator is a more robust way of traversing the list
    than using the QPtrList member functions \link QPtrList::first()
    first\endlink(), \link QPtrList::next() next\endlink(), \link
    QPtrList::current() current\endlink(), etc., as many iterators can
    traverse the same list independently.

    An iterator has its own current list item and can get the next and
    previous list items. It doesn't modify the list in any way.

    When an item is removed from the list, all iterators that point to
    that item are updated to point to QPtrList::current() instead to
    avoid dangling references.

    \sa QPtrList
*/

/*!
    \fn QPtrListIterator::QPtrListIterator( const QPtrList<type> &list )

    Constructs an iterator for \a list. The current iterator item is
    set to point on the first item in the \a list.
*/

/*!
    \fn QPtrListIterator::~QPtrListIterator()

    Destroys the iterator.
*/

/*!
    \fn uint QPtrListIterator::count() const

    Returns the number of items in the list this iterator operates on.

    \sa isEmpty()
*/

/*!
    \fn bool QPtrListIterator::isEmpty() const

    Returns TRUE if the list is empty; otherwise returns FALSE.

    \sa count()
*/

/*!
    \fn bool QPtrListIterator::atFirst() const

    Returns TRUE if the current iterator item is the first list item;
    otherwise returns FALSE.

    \sa toFirst(), atLast()
*/

/*!
    \fn bool QPtrListIterator::atLast() const

    Returns TRUE if the current iterator item is the last list item;
    otherwise returns FALSE.

    \sa toLast(), atFirst()
*/

/*!
    \fn type *QPtrListIterator::toFirst()

    Sets the current iterator item to point to the first list item and
    returns a pointer to the item. Sets the current item to 0 and
    returns 0 if the list is empty.

    \sa toLast(), atFirst()
*/

/*!
    \fn type *QPtrListIterator::toLast()

    Sets the current iterator item to point to the last list item and
    returns a pointer to the item. Sets the current item to 0 and
    returns 0 if the list is empty.

    \sa toFirst(), atLast()
*/

/*!
    \fn QPtrListIterator::operator type *() const

    Cast operator. Returns a pointer to the current iterator item.
    Same as current().
*/

/*!
    \fn type *QPtrListIterator::operator*()

    Asterisk operator. Returns a pointer to the current iterator item.
    Same as current().
*/

/*!
    \fn type *QPtrListIterator::current() const

    Returns a pointer to the current iterator item. If the iterator is
    positioned before the first item in the list or after the last
    item in the list, 0 is returned.
*/

/*!
    \fn type *QPtrListIterator::operator()()

    Makes the succeeding item current and returns the original current
    item.

    If the current iterator item was the last item in the list or if
    it was 0, 0 is returned.
*/

/*!
    \fn type *QPtrListIterator::operator++()

    Prefix ++ makes the succeeding item current and returns the new
    current item.

    If the current iterator item was the last item in the list or if
    it was 0, 0 is returned.
*/

/*!
    \fn type *QPtrListIterator::operator+=( uint jump )

    Sets the current item to the item \a jump positions after the
    current item and returns a pointer to that item.

    If that item is beyond the last item or if the list is empty, it
    sets the current item to 0 and returns 0
*/

/*!
    \fn type *QPtrListIterator::operator--()

    Prefix - makes the preceding item current and returns the new
    current item.

    If the current iterator item was the first item in the list or if
    it was 0, 0 is returned.
*/

/*!
    \fn type *QPtrListIterator::operator-=( uint jump )

    Returns the item \a jump positions before the current item or 0
    if it is beyond the first item. Makes this the current item.
*/

/*!
    \fn QPtrListIterator<type>& QPtrListIterator::operator=( const QPtrListIterator<type> &it )

    Assignment. Makes a copy of the iterator \a it and returns a
    reference to this iterator.
*/


/*****************************************************************************
  QStrList documentation
 *****************************************************************************/

/*!
    \class QStrList qstrlist.h
    \brief The QStrList class provides a doubly-linked list of char*.

    \ingroup collection
    \ingroup tools
    \ingroup text

    If you want a string list of \l{QString}s use QStringList.

    This class is a QPtrList\<char\> instance (a list of char*).

    QStrList can make deep or shallow copies of the strings that are
    inserted.

    A deep copy means that memory is allocated for the string and then
    the string data is copied into that memory. A shallow copy is just
    a copy of the pointer value and not of the string data itself.

    The disadvantage of shallow copies is that because a pointer can
    be deleted only once, the program must put all strings in a
    central place and know when it is safe to delete them (i.e. when
    the strings are no longer referenced by other parts of the
    program). This can make the program more complex. The advantage of
    shallow copies is that they consume far less memory than deep
    copies. It is also much faster to copy a pointer (typically 4 or 8
    bytes) than to copy string data.

    A QStrList that operates on deep copies will, by default, turn on
    auto-deletion (see setAutoDelete()). Thus, by default QStrList
    will deallocate any string copies it allocates.

    The virtual compareItems() function is reimplemented and does a
    case-sensitive string comparison. The inSort() function will
    insert strings in sorted order. In general it is fastest to insert
    the strings as they come and sort() at the end; inSort() is useful
    when you just have to add a few extra strings to an already sorted
    list.

    The QStrListIterator class is an iterator for QStrList.
*/

/*!
    \fn QStrList::QStrList( bool deepCopies )

    Constructs an empty list of strings. Will make deep copies of all
    inserted strings if \a deepCopies is TRUE, or use shallow copies
    if \a deepCopies is FALSE.
*/

/*!
    \fn QStrList::QStrList( const QStrList &list )

    Constructs a copy of \a list.

    If \a list has deep copies, this list will also get deep copies.
    Only the pointers are copied (shallow copy) if the other list does
    not use deep copies.
*/

/*!
    \fn QStrList::~QStrList()

    Destroys the list. All strings are removed.
*/

/*!
    \fn QStrList& QStrList::operator=( const QStrList& list )

    Assigns \a list to this list and returns a reference to this list.

    If \a list has deep copies, this list will also get deep copies.
    Only the pointers are copied (shallow copy) if the other list does
    not use deep copies.
*/


/*****************************************************************************
  QStrIList documentation
 *****************************************************************************/

/*!
    \class QStrIList qstrlist.h
    \brief The QStrIList class provides a doubly-linked list of char*
    with case-insensitive comparison.

    \ingroup collection
    \ingroup tools

    This class is a QPtrList\<char\> instance (a list of char*).

    QStrIList is identical to QStrList except that the virtual
    compareItems() function is reimplemented to compare strings
    case-insensitively. The inSort() function inserts strings in a
    sorted order. In general it is fastest to insert the strings as
    they come and sort() at the end; inSort() is useful when you just
    have to add a few extra strings to an already sorted list.

    The QStrListIterator class works for QStrIList.

    \sa QStringList
*/

/*!
    \fn QStrIList::QStrIList( bool deepCopies )

    Constructs a list of strings. Will make deep copies of all
    inserted strings if \a deepCopies is TRUE, or use shallow copies
    if \a deepCopies is FALSE.
*/

/*!
    \fn QStrIList::~QStrIList()

    Destroys the list. All strings are removed.
*/

/*!
    \fn int QPtrList::compareItems( QPtrCollection::Item item1,
				    QPtrCollection::Item item2 )

    This virtual function compares two list items.

    Returns:
    \list
    \i zero if \a item1 == \a item2
    \i nonzero if \a item1 != \a item2
    \endlist

    This function returns \e int rather than \e bool so that
    reimplementations can return three values and use it to sort by:

    \list
    \i 0 if \a item1 == \a item2
    \i \> 0 (positive integer) if \a item1 \> \a item2
    \i \< 0 (negative integer) if \a item1 \< \a item2
    \endlist

    inSort() requires that compareItems() is implemented as described
    here.

    This function should not modify the list because some const
    functions call compareItems().

    The default implementation compares the pointers.
*/

/*!
    \fn QDataStream& QPtrList::read( QDataStream& s,
				    QPtrCollection::Item& item )

    Reads a list item from the stream \a s and returns a reference to
    the stream.

    The default implementation sets \a item to 0.

    \sa write()
*/

/*!
    \fn QDataStream& QPtrList::write( QDataStream& s,
					QPtrCollection::Item item ) const

    Writes a list item, \a item to the stream \a s and returns a
    reference to the stream.

    The default implementation does nothing.

    \sa read()
*/

/*! \fn iterator QPtrList::begin() 
\internal
*/
/*! \fn const_iterator QPtrList::begin() const
\internal
*/
/*! \fn iterator QPtrList::end() 
\internal
*/
/*! \fn const_iterator QPtrList::end() const
\internal
*/

/*****************************************************************************
  QStrListIterator documentation
 *****************************************************************************/

/*!
    \class QStrListIterator qstrlist.h
    \brief The QStrListIterator class is an iterator for the QStrList
    and QStrIList classes.

    \ingroup tools

    This class is a QPtrListIterator\<char\> instance. It can traverse
    the strings in the QStrList and QStrIList classes.
*/


/*****************************************************************************
  QPtrListAutoDelete documentation
 *****************************************************************************/
/*
    \class QPtrListAutoDelete
    \brief The QPtrListAutoDelete class is a template class that provides a list that auto-deletes its data.

    \ingroup collection
    \ingroup tools

    A QPtrListAutoDelete is identical to a QPtrList with
    setAutoDelete(TRUE).
*/