1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
|
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qapplication.h"
#include "qdebug.h"
#include "qformlayout.h"
#include "qlabel.h"
#include "qlayout_p.h"
#include "qlayoutengine_p.h"
#include "qrect.h"
#include "qvector.h"
#include "qwidget.h"
QT_BEGIN_NAMESPACE
namespace {
// Fixed column matrix, stores items as [i11, i12, i21, i22...],
// with FORTRAN-style index operator(r, c).
template <class T, int NumColumns>
class FixedColumnMatrix {
public:
typedef QVector<T> Storage;
FixedColumnMatrix() { }
void clear() { m_storage.clear(); }
const T &operator()(int r, int c) const { return m_storage[r * NumColumns + c]; }
T &operator()(int r, int c) { return m_storage[r * NumColumns + c]; }
int rowCount() const { return m_storage.size() / NumColumns; }
void addRow(const T &value);
void insertRow(int r, const T &value);
void removeRow(int r);
bool find(const T &value, int *rowPtr, int *colPtr) const ;
int count(const T &value) const { return m_storage.count(value); }
// Hmmpf.. Some things are faster that way.
const Storage &storage() const { return m_storage; }
static void storageIndexToPosition(int idx, int *rowPtr, int *colPtr);
private:
Storage m_storage;
};
template <class T, int NumColumns>
void FixedColumnMatrix<T, NumColumns>::addRow(const T &value)
{
for (int i = 0; i < NumColumns; ++i)
m_storage.append(value);
}
template <class T, int NumColumns>
void FixedColumnMatrix<T, NumColumns>::insertRow(int r, const T &value)
{
Q_TYPENAME Storage::iterator it = m_storage.begin();
it += r * NumColumns;
m_storage.insert(it, NumColumns, value);
}
template <class T, int NumColumns>
void FixedColumnMatrix<T, NumColumns>::removeRow(int r)
{
m_storage.remove(r * NumColumns, NumColumns);
}
template <class T, int NumColumns>
bool FixedColumnMatrix<T, NumColumns>::find(const T &value, int *rowPtr, int *colPtr) const
{
const int idx = m_storage.indexOf(value);
if (idx == -1)
return false;
storageIndexToPosition(idx, rowPtr, colPtr);
return true;
}
template <class T, int NumColumns>
void FixedColumnMatrix<T, NumColumns>::storageIndexToPosition(int idx, int *rowPtr, int *colPtr)
{
*rowPtr = idx / NumColumns;
*colPtr = idx % NumColumns;
}
} // namespace
// special values for unset fields; must not clash with values of FieldGrowthPolicy or
// RowWrapPolicy
const uint DefaultFieldGrowthPolicy = 255;
const uint DefaultRowWrapPolicy = 255;
enum { ColumnCount = 2 };
// -- our data structure for our items
// This owns the QLayoutItem
struct QFormLayoutItem
{
QFormLayoutItem(QLayoutItem* i) : item(i), fullRow(false), isHfw(false) { }
~QFormLayoutItem() { delete item; }
// Wrappers
QWidget *widget() const { return item->widget(); }
QLayout *layout() const { return item->layout(); }
bool hasHeightForWidth() const { return item->hasHeightForWidth(); }
int heightForWidth(int width) const { return item->heightForWidth(width); }
int minimumHeightForWidth(int width) const { return item->minimumHeightForWidth(width); }
Qt::Orientations expandingDirections() const { return item->expandingDirections(); }
QSizePolicy::ControlTypes controlTypes() const { return item->controlTypes(); }
int vStretch() const { return widget() ? widget()->sizePolicy().verticalStretch() : 0; }
void setGeometry(const QRect& r) { item->setGeometry(r); }
QRect geometry() const { return item->geometry(); }
// For use with FixedColumnMatrix
bool operator==(const QFormLayoutItem& other) { return item == other.item; }
QLayoutItem *item;
bool fullRow;
// set by updateSizes
bool isHfw;
QSize minSize;
QSize sizeHint;
QSize maxSize;
// also set by updateSizes
int sbsHSpace; // only used for side by side, for the field item only (not label)
int vSpace; // This is the spacing to the item in the row above
// set by setupVerticalLayoutData
bool sideBySide;
int vLayoutIndex;
// set by setupHorizontalLayoutData
int layoutPos;
int layoutWidth;
};
class QFormLayoutPrivate : public QLayoutPrivate
{
Q_DECLARE_PUBLIC(QFormLayout)
public:
typedef FixedColumnMatrix<QFormLayoutItem *, ColumnCount> ItemMatrix;
QFormLayoutPrivate();
~QFormLayoutPrivate() { }
int insertRow(int row);
void insertRows(int row, int count);
void setItem(int row, QFormLayout::ItemRole role, QLayoutItem *item);
void setLayout(int row, QFormLayout::ItemRole role, QLayout *layout);
void setWidget(int row, QFormLayout::ItemRole role, QWidget *widget);
void arrangeWidgets(const QVector<QLayoutStruct>& layouts, QRect &rect);
void updateSizes();
void setupVerticalLayoutData(int width);
void setupHorizontalLayoutData(int width);
QStyle* getStyle() const;
inline bool haveHfwCached(int width) const
{
return (hfw_width == width) || (width == sh_width && hfw_sh_height >= 0);
}
void recalcHFW(int w);
void setupHfwLayoutData();
uint fieldGrowthPolicy : 8;
uint rowWrapPolicy : 8;
uint has_hfw : 2;
uint dirty : 2; // have we laid out yet?
uint sizesDirty : 2; // have we (not) gathered layout item sizes?
uint expandVertical : 1; // Do we expand vertically?
uint expandHorizontal : 1; // Do we expand horizonally?
Qt::Alignment labelAlignment;
Qt::Alignment formAlignment;
ItemMatrix m_matrix;
QList<QFormLayoutItem *> m_things;
int layoutWidth; // the last width that we called setupVerticalLayoutData on (for vLayouts)
int hfw_width; // the last width we calculated HFW for
int hfw_height; // what that height was
int hfw_minheight; // what that minheight was
int hfw_sh_height; // the hfw for sh_width
int hfw_sh_minheight; // the minhfw for sh_width
int min_width; // the width that gets turned into minSize (from updateSizes)
int sh_width; // the width that gets turned into prefSize (from updateSizes)
int thresh_width; // the width that we start splitting label/field pairs at (from updateSizes)
QSize minSize;
QSize prefSize;
int formMaxWidth;
void calcSizeHints();
QVector<QLayoutStruct> vLayouts; // set by setupVerticalLayoutData;
int vLayoutCount; // Number of rows we calculated in setupVerticalLayoutData
int maxLabelWidth; // the label width we calculated in setupVerticalLayoutData
QVector<QLayoutStruct> hfwLayouts;
int hSpacing;
int vSpacing;
};
QFormLayoutPrivate::QFormLayoutPrivate()
: fieldGrowthPolicy(DefaultFieldGrowthPolicy),
rowWrapPolicy(DefaultRowWrapPolicy), has_hfw(false), dirty(true), sizesDirty(true),
expandVertical(0), expandHorizontal(0), labelAlignment(0), formAlignment(0),
layoutWidth(-1), hfw_width(-1), hfw_sh_height(-1), min_width(-1),
sh_width(-1), thresh_width(QLAYOUTSIZE_MAX), hSpacing(-1), vSpacing(-1)
{
}
static Qt::Alignment fixedAlignment(Qt::Alignment alignment, Qt::LayoutDirection layoutDirection)
{
if (layoutDirection == Qt::RightToLeft && alignment & Qt::AlignAbsolute) {
// swap left and right, and eliminate absolute flag
return Qt::Alignment((alignment & ~(Qt::AlignLeft | Qt::AlignRight | Qt::AlignAbsolute))
| ((alignment & Qt::AlignRight) ? Qt::AlignLeft : 0)
| ((alignment & Qt::AlignLeft) ? Qt::AlignRight : 0));
} else {
return alignment & ~Qt::AlignAbsolute;
}
}
static int storageIndexFromLayoutItem(const QFormLayoutPrivate::ItemMatrix &m,
QFormLayoutItem *item)
{
if (item) {
return m.storage().indexOf(item);
} else {
return -1;
}
}
static void updateFormLayoutItem(QFormLayoutItem *item, int userVSpacing,
QFormLayout::FieldGrowthPolicy fieldGrowthPolicy,
bool fullRow)
{
item->minSize = item->item->minimumSize();
item->sizeHint = item->item->sizeHint();
item->maxSize = item->item->maximumSize();
if (!fullRow && (fieldGrowthPolicy == QFormLayout::FieldsStayAtSizeHint
|| (fieldGrowthPolicy == QFormLayout::ExpandingFieldsGrow
&& !(item->item->expandingDirections() & Qt::Horizontal))))
item->maxSize.setWidth(item->sizeHint.width());
item->isHfw = item->item->hasHeightForWidth();
item->vSpace = userVSpacing;
}
/*
Iterate over all the controls and gather their size information
(min, sizeHint and max). Also work out what the spacing between
pairs of controls should be, and figure out the min and sizeHint
widths.
*/
void QFormLayoutPrivate::updateSizes()
{
Q_Q(QFormLayout);
if (sizesDirty) {
QFormLayout::RowWrapPolicy wrapPolicy = q->rowWrapPolicy();
bool wrapAllRows = (wrapPolicy == QFormLayout::WrapAllRows);
bool dontWrapRows = (wrapPolicy == QFormLayout::DontWrapRows);
int rr = m_matrix.rowCount();
has_hfw = false;
// If any control can expand, so can this layout
// Wrapping doesn't affect expansion, though, just the minsize
bool expandH = false;
bool expandV = false;
QFormLayoutItem *prevLbl = 0;
QFormLayoutItem *prevFld = 0;
QWidget *parent = q->parentWidget();
QStyle *style = parent ? parent->style() : 0;
int userVSpacing = q->verticalSpacing();
int userHSpacing = wrapAllRows ? 0 : q->horizontalSpacing();
int maxMinLblWidth = 0;
int maxMinFldWidth = 0; // field with label
int maxMinIfldWidth = 0; // independent field
int maxShLblWidth = 0;
int maxShFldWidth = 0;
int maxShIfldWidth = 0;
for (int i = 0; i < rr; ++i) {
QFormLayoutItem *label = m_matrix(i, 0);
QFormLayoutItem *field = m_matrix(i, 1);
// Skip empty rows
if (!label && !field)
continue;
if (label) {
updateFormLayoutItem(label, userVSpacing, q->fieldGrowthPolicy(), false);
if (label->isHfw)
has_hfw = true;
Qt::Orientations o = label->expandingDirections();
if (o & Qt::Vertical)
expandV = true;
if (o & Qt::Horizontal)
expandH = true;
}
if (field) {
updateFormLayoutItem(field, userVSpacing, q->fieldGrowthPolicy(), !label && field->fullRow);
field->sbsHSpace = (!label && field->fullRow) ? 0 : userHSpacing;
if (field->isHfw)
has_hfw = true;
Qt::Orientations o = field->expandingDirections();
if (o & Qt::Vertical)
expandV = true;
if (o & Qt::Horizontal)
expandH = true;
}
// See if we need to calculate default spacings
if ((userHSpacing < 0 || userVSpacing < 0) && style) {
QSizePolicy::ControlTypes lbltypes =
QSizePolicy::ControlTypes(label ? label->controlTypes() : QSizePolicy::DefaultType);
QSizePolicy::ControlTypes fldtypes =
QSizePolicy::ControlTypes(field ? field->controlTypes() : QSizePolicy::DefaultType);
// VSpacing
if (userVSpacing < 0) {
if (wrapAllRows) {
// label spacing is to a previous item
QFormLayoutItem *lbltop = prevFld ? prevFld : prevLbl;
// field spacing is to the label (or a previous item)
QFormLayoutItem *fldtop = label ? label : lbltop;
QSizePolicy::ControlTypes lbltoptypes =
QSizePolicy::ControlTypes(lbltop ? lbltop->controlTypes() : QSizePolicy::DefaultType);
QSizePolicy::ControlTypes fldtoptypes =
QSizePolicy::ControlTypes(fldtop ? fldtop->controlTypes() : QSizePolicy::DefaultType);
if (label && lbltop)
label->vSpace = style->combinedLayoutSpacing(lbltoptypes, lbltypes, Qt::Vertical, 0, parent);
if (field && fldtop)
field->vSpace = style->combinedLayoutSpacing(fldtoptypes, fldtypes, Qt::Vertical, 0, parent);
} else {
// Side by side.. we have to also consider the spacings to empty cells, which can strangely be more than
// non empty cells..
QFormLayoutItem *lbltop = prevLbl ? prevLbl : prevFld;
QFormLayoutItem *fldtop = prevFld;
QSizePolicy::ControlTypes lbltoptypes =
QSizePolicy::ControlTypes(lbltop ? lbltop->controlTypes() : QSizePolicy::DefaultType);
QSizePolicy::ControlTypes fldtoptypes =
QSizePolicy::ControlTypes(fldtop ? fldtop->controlTypes() : QSizePolicy::DefaultType);
// To be compatible to QGridLayout, we have to compare solitary labels & fields with both predecessors
if (label) {
if (!field) {
int lblspacing = style->combinedLayoutSpacing(lbltoptypes, lbltypes, Qt::Vertical, 0, parent);
int fldspacing = style->combinedLayoutSpacing(fldtoptypes, lbltypes, Qt::Vertical, 0, parent);
label->vSpace = qMax(lblspacing, fldspacing);
} else
label->vSpace = style->combinedLayoutSpacing(lbltoptypes, lbltypes, Qt::Vertical, 0, parent);
}
if (field) {
// check spacing against both the previous label and field
if (!label) {
int lblspacing = style->combinedLayoutSpacing(lbltoptypes, fldtypes, Qt::Vertical, 0, parent);
int fldspacing = style->combinedLayoutSpacing(fldtoptypes, fldtypes, Qt::Vertical, 0, parent);
field->vSpace = qMax(lblspacing, fldspacing);
} else
field->vSpace = style->combinedLayoutSpacing(fldtoptypes, fldtypes, Qt::Vertical, 0, parent);
}
}
}
// HSpacing
// hard-coded the left and right control types so that all the rows have the same
// inter-column spacing (otherwise the right column isn't always left aligned)
if (userHSpacing < 0 && !wrapAllRows && (label || !field->fullRow) && field)
field->sbsHSpace = style->combinedLayoutSpacing(QSizePolicy::Label, QSizePolicy::LineEdit, Qt::Horizontal, 0, parent);
}
// Now update our min/sizehint widths
// We choose to put the spacing in the field side in sbs, so
// the right edge of the labels will align, but fields may
// be a little ragged.. since different controls may have
// different appearances, a slight raggedness in the left
// edges of fields can be tolerated.
// (Note - field->sbsHSpace is 0 for WrapAllRows mode)
if (label) {
maxMinLblWidth = qMax(maxMinLblWidth, label->minSize.width());
maxShLblWidth = qMax(maxShLblWidth, label->sizeHint.width());
if (field) {
maxMinFldWidth = qMax(maxMinFldWidth, field->minSize.width() + field->sbsHSpace);
maxShFldWidth = qMax(maxShFldWidth, field->sizeHint.width() + field->sbsHSpace);
}
} else if (field) {
maxMinIfldWidth = qMax(maxMinIfldWidth, field->minSize.width());
maxShIfldWidth = qMax(maxShIfldWidth, field->sizeHint.width());
}
prevLbl = label;
prevFld = field;
}
// Now, finally update the min/sizeHint widths
if (wrapAllRows) {
sh_width = qMax(maxShLblWidth, qMax(maxShIfldWidth, maxShFldWidth));
min_width = qMax(maxMinLblWidth, qMax(maxMinIfldWidth, maxMinFldWidth));
// in two line, we don't care as much about the threshold width
thresh_width = 0;
} else if (dontWrapRows) {
// This is just the max widths glommed together
sh_width = qMax(maxShLblWidth + maxShFldWidth, maxShIfldWidth);
min_width = qMax(maxMinLblWidth + maxMinFldWidth, maxMinIfldWidth);
thresh_width = QWIDGETSIZE_MAX;
} else {
// This is just the max widths glommed together
sh_width = qMax(maxShLblWidth + maxShFldWidth, maxShIfldWidth);
// min width needs to be the min when everything is wrapped,
// otherwise we'll never get set with a width that causes wrapping
min_width = qMax(maxMinLblWidth, qMax(maxMinIfldWidth, maxMinFldWidth));
// We split a pair at label sh + field min (### for now..)
thresh_width = maxShLblWidth + maxMinFldWidth;
}
// Update the expansions
expandVertical = expandV;
expandHorizontal = expandH;
}
sizesDirty = false;
}
void QFormLayoutPrivate::recalcHFW(int w)
{
setupHfwLayoutData();
int h = 0;
int mh = 0;
for (int r = 0; r < vLayoutCount; ++r) {
int spacing = hfwLayouts.at(r).spacing;
h += hfwLayouts.at(r).sizeHint + spacing;
mh += hfwLayouts.at(r).minimumSize + spacing;
}
if (sh_width > 0 && sh_width == w) {
hfw_sh_height = qMin(QLAYOUTSIZE_MAX, h);
hfw_sh_minheight = qMin(QLAYOUTSIZE_MAX, mh);
} else {
hfw_width = w;
hfw_height = qMin(QLAYOUTSIZE_MAX, h);
hfw_minheight = qMin(QLAYOUTSIZE_MAX, mh);
}
}
void QFormLayoutPrivate::setupHfwLayoutData()
{
// setupVerticalLayoutData must be called before this
// setupHorizontalLayoutData must also be called before this
// copies non hfw data into hfw
// then updates size and min
// Note: QGridLayout doesn't call minimumHeightForWidth,
// but instead uses heightForWidth for both min and sizeHint.
// For the common case where minimumHeightForWidth just calls
// heightForWidth, we do the calculation twice, which can be
// very expensive for word wrapped QLabels/QTextEdits, for example.
// So we just use heightForWidth as well.
int i;
int rr = m_matrix.rowCount();
hfwLayouts.clear();
hfwLayouts.resize(vLayoutCount);
for (i = 0; i < vLayoutCount; ++i)
hfwLayouts[i] = vLayouts.at(i);
for (i = 0; i < rr; ++i) {
QFormLayoutItem *label = m_matrix(i, 0);
QFormLayoutItem *field = m_matrix(i, 1);
if (label) {
if (label->isHfw) {
// We don't check sideBySide here, since a label is only
// ever side by side with its field
int hfw = label->heightForWidth(label->layoutWidth);
hfwLayouts[label->vLayoutIndex].minimumSize = hfw;
hfwLayouts[label->vLayoutIndex].sizeHint = hfw;
} else {
// Reset these here, so the field can do a qMax below (the previous value may have
// been the fields non-hfw values, which are often larger than hfw)
hfwLayouts[label->vLayoutIndex].sizeHint = label->sizeHint.height();
hfwLayouts[label->vLayoutIndex].minimumSize = label->minSize.height();
}
}
if (field) {
int hfw = field->isHfw ? field->heightForWidth(field->layoutWidth) : 0;
int h = field->isHfw ? hfw : field->sizeHint.height();
int mh = field->isHfw ? hfw : field->minSize.height();
if (field->sideBySide) {
int oh = hfwLayouts.at(field->vLayoutIndex).sizeHint;
int omh = hfwLayouts.at(field->vLayoutIndex).minimumSize;
hfwLayouts[field->vLayoutIndex].sizeHint = qMax(h, oh);
hfwLayouts[field->vLayoutIndex].minimumSize = qMax(mh, omh);
} else {
hfwLayouts[field->vLayoutIndex].sizeHint = h;
hfwLayouts[field->vLayoutIndex].minimumSize = mh;
}
}
}
}
/*
Given up to four items involved in a vertical spacing calculation
(two rows * two columns), return the max vertical spacing for the
row containing item1 (which may also include item2)
We assume parent and item1 are not null.
If a particular row is split, then the spacings for that row and
the following row are affected, and this function should be
called with recalculate = true for both rows (note: only rows with both
a label and a field can be split).
In particular:
1) the split label's row vspace needs to be changed to qMax(label/prevLabel, label/prevField)
[call with item1 = label, item2 = null, prevItem1 & prevItem2 as before]
2) the split field's row vspace needs to be changed to the label/field spacing
[call with item1 = field, item2 = null, prevItem1 = label, prevItem2 = null]
[if the next row has one item, 'item']
3a) the following row's vspace needs to be changed to item/field spacing (would
previously been the qMax(item/label, item/field) spacings)
[call with item1 = item, item2 = null, prevItem1 = field, prevItem2 = null]
[if the next row has two items, 'label2' and 'field2']
3b) the following row's vspace needs to be changed to be qMax(field/label2, field/field2) spacing
[call with item1 = label2, item2 = field2, prevItem1 = field, prevItem2 = null]
In the (common) non split case, we can just use the precalculated vspace (possibly qMaxed between
label and field).
If recalculate is true, we expect:
- parent != null
- item1 != null
- item2 can be null
- prevItem1 can be null
- if item2 is not null, prevItem2 will be null (e.g. steps 1 or 3 above)
- if prevItem1 is null, prevItem2 will be null
*/
static inline int spacingHelper(QWidget* parent, QStyle *style, int userVSpacing, bool recalculate, QFormLayoutItem* item1, QFormLayoutItem* item2, QFormLayoutItem* prevItem1, QFormLayoutItem *prevItem2)
{
int spacing = userVSpacing;
if (spacing < 0) {
if (!recalculate) {
if (item1)
spacing = item1->vSpace;
if (item2)
spacing = qMax(spacing, item2->vSpace);
} else {
if (style && prevItem1) {
QSizePolicy::ControlTypes itemtypes =
QSizePolicy::ControlTypes(item1 ? item1->controlTypes() : QSizePolicy::DefaultType);
int spacing2 = 0;
spacing = style->combinedLayoutSpacing(itemtypes, prevItem1->controlTypes(), Qt::Vertical, 0, parent);
// At most of one of item2 and prevItem2 will be nonnull
if (item2)
spacing2 = style->combinedLayoutSpacing(item2->controlTypes(), prevItem1->controlTypes(), Qt::Vertical, 0, parent);
else if (prevItem2)
spacing2 = style->combinedLayoutSpacing(itemtypes, prevItem2->controlTypes(), Qt::Vertical, 0, parent);
spacing = qMax(spacing, spacing2);
}
}
} else {
if (prevItem1) {
QWidget *wid = prevItem1->item->widget();
if (wid)
spacing = qMax(spacing, prevItem1->geometry().top() - wid->geometry().top() );
}
if (prevItem2) {
QWidget *wid = prevItem2->item->widget();
if (wid)
spacing = qMax(spacing, prevItem2->geometry().top() - wid->geometry().top() );
}
}
return spacing;
}
static inline void initLayoutStruct(QLayoutStruct& sl, QFormLayoutItem* item)
{
sl.init(item->vStretch(), item->minSize.height());
sl.sizeHint = item->sizeHint.height();
sl.maximumSize = item->maxSize.height();
sl.expansive = (item->expandingDirections() & Qt::Vertical);
sl.empty = false;
}
void QFormLayoutPrivate::setupVerticalLayoutData(int width)
{
Q_Q(QFormLayout);
// Early out if we have no changes that would cause a change in vertical layout
if ((width == layoutWidth || (width >= thresh_width && layoutWidth >= thresh_width)) && !dirty && !sizesDirty)
return;
layoutWidth = width;
int rr = m_matrix.rowCount();
int vidx = 1;
QFormLayout::RowWrapPolicy rowWrapPolicy = q->rowWrapPolicy();
bool wrapAllRows = (rowWrapPolicy == QFormLayout::WrapAllRows);
bool addTopBottomStretch = true;
vLayouts.clear();
vLayouts.resize((2 * rr) + 2); // a max, some may be unused
QStyle *style = 0;
int userVSpacing = q->verticalSpacing();
if (userVSpacing < 0) {
if (QWidget *widget = q->parentWidget())
style = widget->style();
}
// make sure our sizes are up to date
updateSizes();
// Grab the widest label width here
// This might be different from the value computed during
// sizeHint/minSize, since we don't count label/field pairs that
// are split.
maxLabelWidth = 0;
if (!wrapAllRows) {
for (int i = 0; i < rr; ++i) {
const QFormLayoutItem *label = m_matrix(i, 0);
const QFormLayoutItem *field = m_matrix(i, 1);
if (label && (label->sizeHint.width() + (field ? field->minSize.width() : 0) <= width))
maxLabelWidth = qMax(maxLabelWidth, label->sizeHint.width());
}
} else {
maxLabelWidth = width;
}
QFormLayoutItem *prevItem1 = 0;
QFormLayoutItem *prevItem2 = 0;
bool prevRowSplit = false;
for (int i = 0; i < rr; ++i) {
QFormLayoutItem *label = m_matrix(i, 0);
QFormLayoutItem *field = m_matrix(i, 1);
// Totally ignore empty rows...
if (!label && !field)
continue;
QSize min1;
QSize min2;
QSize sh1;
QSize sh2;
if (label) {
min1 = label->minSize;
sh1 = label->sizeHint;
}
if (field) {
min2 = field->minSize;
sh2 = field->sizeHint;
}
// In separate lines, we make a vLayout for everything that isn't null
// in side by side, we only separate label/field if we're going to wrap it
bool splitSideBySide = (rowWrapPolicy == QFormLayout::WrapLongRows)
&& ((maxLabelWidth < sh1.width()) || (width < (maxLabelWidth + min2.width())));
if (wrapAllRows || splitSideBySide) {
if (label) {
initLayoutStruct(vLayouts[vidx], label);
if (vidx > 1)
vLayouts[vidx - 1].spacing = spacingHelper(q->parentWidget(), style, userVSpacing, splitSideBySide || prevRowSplit, label, 0, prevItem1, prevItem2);
label->vLayoutIndex = vidx;
label->sideBySide = false;
prevItem1 = label;
prevItem2 = 0;
if (vLayouts[vidx].stretch > 0)
addTopBottomStretch = false;
++vidx;
}
if (field) {
initLayoutStruct(vLayouts[vidx], field);
if (vidx > 1)
vLayouts[vidx - 1].spacing = spacingHelper(q->parentWidget(), style, userVSpacing, splitSideBySide || prevRowSplit, field, 0, prevItem1, prevItem2);
field->vLayoutIndex = vidx;
field->sideBySide = false;
prevItem1 = field;
prevItem2 = 0;
if (vLayouts[vidx].stretch > 0)
addTopBottomStretch = false;
++vidx;
}
prevRowSplit = splitSideBySide;
} else {
// we're in side by side mode, and we have enough space to do that
QSize max1(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
QSize max2(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
int stretch1 = 0;
int stretch2 = 0;
bool expanding = false;
if (label) {
max1 = label->maxSize;
if (label->expandingDirections() & Qt::Vertical)
expanding = true;
label->sideBySide = (field != 0);
label->vLayoutIndex = vidx;
stretch1 = label->vStretch();
}
if (field) {
max2 = field->maxSize;
if (field->expandingDirections() & Qt::Vertical)
expanding = true;
field->sideBySide = (label || !field->fullRow);
field->vLayoutIndex = vidx;
stretch2 = field->vStretch();
}
vLayouts[vidx].init(qMax(stretch1, stretch2), qMax(min1.height(), min2.height()));
vLayouts[vidx].sizeHint = qMax(sh1.height(), sh2.height());
vLayouts[vidx].maximumSize = qMin(max1.height(), max2.height());
vLayouts[vidx].expansive = expanding || (vLayouts[vidx].stretch > 0);
vLayouts[vidx].empty = false;
if (vLayouts[vidx].stretch > 0)
addTopBottomStretch = false;
if (vidx > 1)
vLayouts[vidx - 1].spacing = spacingHelper(q->parentWidget(), style, userVSpacing, prevRowSplit, label, field, prevItem1, prevItem2);
if (label) {
prevItem1 = label;
prevItem2 = field;
} else {
prevItem1 = field;
prevItem2 = 0;
}
prevRowSplit = false;
++vidx;
}
}
if (addTopBottomStretch) {
Qt::Alignment formAlignment = q->formAlignment();
if (!(formAlignment & Qt::AlignBottom)) {
// AlignTop (default if unspecified) or AlignVCenter: We add a stretch at the bottom
vLayouts[vidx].init(1, 0);
vLayouts[vidx].expansive = true;
++vidx;
}
if (formAlignment & (Qt::AlignVCenter | Qt::AlignBottom)) {
// AlignVCenter or AlignBottom: We add a stretch at the top
vLayouts[0].init(1, 0);
vLayouts[0].expansive = true;
} else {
vLayouts[0].init(0, 0);
}
} else {
vLayouts[0].init(0, 0);
}
vLayoutCount = vidx;
dirty = false;
}
void QFormLayoutPrivate::setupHorizontalLayoutData(int width)
{
Q_Q(QFormLayout);
// requires setupVerticalLayoutData to be called first
int fieldMaxWidth = 0;
int rr = m_matrix.rowCount();
bool wrapAllRows = (q->rowWrapPolicy() == QFormLayout::WrapAllRows);
for (int i = 0; i < rr; ++i) {
QFormLayoutItem *label = m_matrix(i, 0);
QFormLayoutItem *field = m_matrix(i, 1);
// Totally ignore empty rows...
if (!label && !field)
continue;
if (label) {
// if there is a field, and we're side by side, we use maxLabelWidth
// otherwise we just use the sizehint
label->layoutWidth = (field && label->sideBySide) ? maxLabelWidth : label->sizeHint.width();
label->layoutPos = 0;
}
if (field) {
// This is the default amount allotted to fields in sbs
int fldwidth = width - maxLabelWidth - field->sbsHSpace;
// If we've split a row, we still decide to align
// the field with all the other field if it will fit
// Fields in sbs mode get the remnants of the maxLabelWidth
if (!field->sideBySide) {
if (wrapAllRows || (!label && field->fullRow) || field->sizeHint.width() > fldwidth) {
field->layoutWidth = width;
field->layoutPos = 0;
} else {
field->layoutWidth = fldwidth;
field->layoutPos = width - fldwidth;
}
} else {
// We're sbs, so we should have a label
field->layoutWidth = fldwidth;
field->layoutPos = width - fldwidth;
}
fieldMaxWidth = qMax(fieldMaxWidth, field->maxSize.width());
}
}
formMaxWidth = maxLabelWidth + fieldMaxWidth;
}
void QFormLayoutPrivate::calcSizeHints()
{
Q_Q(QFormLayout);
int leftMargin, topMargin, rightMargin, bottomMargin;
q->getContentsMargins(&leftMargin, &topMargin, &rightMargin, &bottomMargin);
updateSizes();
setupVerticalLayoutData(QLAYOUTSIZE_MAX);
// Don't need to call setupHorizontal here
int h = topMargin + bottomMargin;
int mh = topMargin + bottomMargin;
// The following are set in updateSizes
int w = sh_width + leftMargin + rightMargin;
int mw = min_width + leftMargin + rightMargin;
for (int i = 0; i < vLayoutCount; ++i) {
int spacing = vLayouts.at(i).spacing;
h += vLayouts.at(i).sizeHint + spacing;
mh += vLayouts.at(i).minimumSize + spacing;
}
minSize.rwidth() = qMin(mw, QLAYOUTSIZE_MAX);
minSize.rheight() = qMin(mh, QLAYOUTSIZE_MAX);
prefSize.rwidth() = qMin(w, QLAYOUTSIZE_MAX);
prefSize.rheight() = qMin(h, QLAYOUTSIZE_MAX);
}
int QFormLayoutPrivate::insertRow(int row)
{
int rowCnt = m_matrix.rowCount();
if (uint(row) > uint(rowCnt))
row = rowCnt;
insertRows(row, 1);
return row;
}
void QFormLayoutPrivate::insertRows(int row, int count)
{
while (count > 0) {
m_matrix.insertRow(row, 0);
--count;
}
}
void QFormLayoutPrivate::setItem(int row, QFormLayout::ItemRole role, QLayoutItem *item)
{
const bool fullRow = role == QFormLayout::SpanningRole;
const int column = role == QFormLayout::SpanningRole ? 1 : static_cast<int>(role);
if (uint(row) >= uint(m_matrix.rowCount()) || uint(column) > 1U) {
qWarning("QFormLayoutPrivate::setItem: Invalid cell (%d, %d)", row, column);
return;
}
if (!item)
return;
if (m_matrix(row, column)) {
qWarning("QFormLayoutPrivate::setItem: Cell (%d, %d) already occupied", row, column);
return;
}
QFormLayoutItem *i = new QFormLayoutItem(item);
i->fullRow = fullRow;
m_matrix(row, column) = i;
m_things.append(i);
}
void QFormLayoutPrivate::setLayout(int row, QFormLayout::ItemRole role, QLayout *layout)
{
if (layout) {
Q_Q(QFormLayout);
q->addChildLayout(layout);
setItem(row, role, layout);
}
}
void QFormLayoutPrivate::setWidget(int row, QFormLayout::ItemRole role, QWidget *widget)
{
if (widget) {
Q_Q(QFormLayout);
q->addChildWidget(widget);
setItem(row, role, QLayoutPrivate::createWidgetItem(q, widget));
}
}
QStyle* QFormLayoutPrivate::getStyle() const
{
Q_Q(const QFormLayout);
// ### cache
if (QWidget *parentWidget = q->parentWidget())
return parentWidget->style();
else
return QApplication::style();
}
/*!
\class QFormLayout
\since 4.4
\brief The QFormLayout class manages forms of input widgets and their associated labels.
\ingroup geomanagement
QFormLayout is a convenience layout class that lays out its
children in a two-column form. The left column consists of labels
and the right column consists of "field" widgets (line editors,
spin boxes, etc.).
Traditionally, such two-column form layouts were achieved using
QGridLayout. QFormLayout is a higher-level alternative that
provides the following advantages:
\list
\o \bold{Adherence to the different platform's look and feel guidelines.}
For example, the
\l{Mac OS X Aqua} and KDE guidelines specify that the
labels should be right-aligned, whereas Windows and GNOME
applications normally use left-alignment.
\o \bold{Support for wrapping long rows.}
For devices with small displays, QFormLayout can be set to
\l{WrapLongRows}{wrap long rows}, or even to
\l{WrapAllRows}{wrap all rows}.
\o \bold{Convenient API for creating label--field pairs.}
The addRow() overload that takes a QString and a QWidget *
creates a QLabel behind the scenes and automatically set up
its buddy. We can then write code like this:
\snippet doc/src/snippets/code/src_gui_kernel_qformlayout.cpp 0
Compare this with the following code, written using QGridLayout:
\snippet doc/src/snippets/code/src_gui_kernel_qformlayout.cpp 1
\endlist
The table below shows the default appearance in different styles.
\table
\header
\o QCommonStyle derived styles (except QPlastiqueStyle)
\o QMacStyle
\o QPlastiqueStyle
\o Qt Extended styles
\row
\o \inlineimage qformlayout-win.png
\o \inlineimage qformlayout-mac.png
\o \inlineimage qformlayout-kde.png
\o \inlineimage qformlayout-qpe.png
\row
\o Traditional style used for Windows, GNOME, and earlier
versions of KDE. Labels are left aligned, and expanding
fields grow to fill the available space. (This normally
corresponds to what we would get using a two-column
QGridLayout.)
\o Style based on the
\l{Mac OS X Aqua} guidelines. Labels are right-aligned,
the fields don't grow beyond their size hint, and the
form is horizontally centered.
\o Recommended style for
\l{KDE applications}. Similar to MacStyle, except that the form
is left-aligned and all fields grow to fill the available
space.
\o Default style for Qt Extended styles. Labels are right-aligned,
expanding fields grow to fill the available space, and row
wrapping is enabled for long lines.
\endtable
The form styles can be also be overridden individually by calling
setLabelAlignment(), setFormAlignment(), setFieldGrowthPolicy(),
and setRowWrapPolicy(). For example, to simulate the form layout
appearance of QMacStyle on all platforms, but with left-aligned
labels, you could write:
\snippet doc/src/snippets/code/src_gui_kernel_qformlayout.cpp 2
\sa QGridLayout, QBoxLayout, QStackedLayout
*/
/*!
\enum QFormLayout::FieldGrowthPolicy
This enum specifies the different policies that can be used to
control the way in which the form's fields grow.
\value FieldsStayAtSizeHint
The fields never grow beyond their
\l{QWidgetItem::sizeHint()}{effective size hint}. This is
the default for QMacStyle.
\value ExpandingFieldsGrow
Fields with an horizontal \l{QSizePolicy}{size policy} of
\l{QSizePolicy::}{Expanding} or
\l{QSizePolicy::}{MinimumExpanding} will grow to fill the
available space. The other fields will not grow beyond
their effective size hint. This is the default policy for
Plastique.
\value AllNonFixedFieldsGrow
All fields with a size policy that allows them to grow
will grow to fill the available space. This is the default
policy for most styles.
\sa fieldGrowthPolicy
*/
/*!
\enum QFormLayout::RowWrapPolicy
This enum specifies the different policies that can be used to
control the way in which the form's rows wrap.
\value DontWrapRows
Fields are always laid out next to their label. This is
the default policy for all styles except Qt Extended styles
and QS60Style.
\value WrapLongRows
Labels are given enough horizontal space to fit the widest label,
and the rest of the space is given to the fields. If the minimum
size of a field pair is wider than the available space, the field
is wrapped to the next line. This is the default policy for
Qt Extended styles and and QS60Style.
\value WrapAllRows
Fields are always laid out below their label.
\sa rowWrapPolicy
*/
/*!
\enum QFormLayout::ItemRole
This enum specifies the types of widgets (or other layout items)
that may appear in a row.
\value LabelRole A label widget.
\value FieldRole A field widget.
\value SpanningRole A widget that spans label and field columns.
\sa itemAt(), getItemPosition()
*/
/*!
Constructs a new form layout with the given \a parent widget.
\sa QWidget::setLayout()
*/
QFormLayout::QFormLayout(QWidget *parent)
: QLayout(*new QFormLayoutPrivate, 0, parent)
{
}
/*!
Destroys the form layout.
*/
QFormLayout::~QFormLayout()
{
Q_D(QFormLayout);
/*
The clearing and destruction order here is important. We start by clearing
m_things so that QLayout and the rest of the world know that we don't babysit
the layout items anymore and don't care if they are destroyed.
*/
d->m_things.clear();
qDeleteAll(d->m_matrix.storage());
d->m_matrix.clear();
}
/*!
Adds a new row to the bottom of this form layout, with the given
\a label and \a field.
\sa insertRow()
*/
void QFormLayout::addRow(QWidget *label, QWidget *field)
{
insertRow(-1, label, field);
}
/*!
\overload
*/
void QFormLayout::addRow(QWidget *label, QLayout *field)
{
insertRow(-1, label, field);
}
/*!
\overload
This overload automatically creates a QLabel behind the scenes
with \a labelText as its text. The \a field is set as the new
QLabel's \l{QLabel::setBuddy()}{buddy}.
*/
void QFormLayout::addRow(const QString &labelText, QWidget *field)
{
insertRow(-1, labelText, field);
}
/*!
\overload
This overload automatically creates a QLabel behind the scenes
with \a labelText as its text.
*/
void QFormLayout::addRow(const QString &labelText, QLayout *field)
{
insertRow(-1, labelText, field);
}
/*!
\overload
Adds the specified \a widget at the end of this form layout. The
\a widget spans both columns.
*/
void QFormLayout::addRow(QWidget *widget)
{
insertRow(-1, widget);
}
/*!
\overload
Adds the specified \a layout at the end of this form layout. The
\a layout spans both columns.
*/
void QFormLayout::addRow(QLayout *layout)
{
insertRow(-1, layout);
}
/*!
Inserts a new row at position \a row in this form layout, with
the given \a label and \a field. If \a row is out of bounds, the
new row is added at the end.
\sa addRow()
*/
void QFormLayout::insertRow(int row, QWidget *label, QWidget *field)
{
Q_D(QFormLayout);
row = d->insertRow(row);
if (label)
d->setWidget(row, LabelRole, label);
if (field)
d->setWidget(row, FieldRole, field);
invalidate();
}
/*!
\overload
*/
void QFormLayout::insertRow(int row, QWidget *label, QLayout *field)
{
Q_D(QFormLayout);
row = d->insertRow(row);
if (label)
d->setWidget(row, LabelRole, label);
if (field)
d->setLayout(row, FieldRole, field);
invalidate();
}
/*!
\overload
This overload automatically creates a QLabel behind the scenes
with \a labelText as its text. The \a field is set as the new
QLabel's \l{QLabel::setBuddy()}{buddy}.
*/
void QFormLayout::insertRow(int row, const QString &labelText, QWidget *field)
{
QLabel *label = 0;
if (!labelText.isEmpty()) {
label = new QLabel(labelText);
#ifndef QT_NO_SHORTCUT
label->setBuddy(field);
#endif
}
insertRow(row, label, field);
}
/*!
\overload
This overload automatically creates a QLabel behind the scenes
with \a labelText as its text.
*/
void QFormLayout::insertRow(int row, const QString &labelText, QLayout *field)
{
insertRow(row, labelText.isEmpty() ? 0 : new QLabel(labelText), field);
}
/*!
\overload
Inserts the specified \a widget at position \a row in this form
layout. The \a widget spans both columns. If \a row is out of
bounds, the widget is added at the end.
*/
void QFormLayout::insertRow(int row, QWidget *widget)
{
Q_D(QFormLayout);
if (!widget) {
qWarning("QFormLayout: Cannot add null field to %s", qPrintable(objectName()));
return;
}
row = d->insertRow(row);
d->setWidget(row, SpanningRole, widget);
invalidate();
}
/*!
\overload
Inserts the specified \a layout at position \a row in this form
layout. The \a layout spans both columns. If \a row is out of
bounds, the widget is added at the end.
*/
void QFormLayout::insertRow(int row, QLayout *layout)
{
Q_D(QFormLayout);
if (!layout) {
qWarning("QFormLayout: Cannot add null field to %s", qPrintable(objectName()));
return;
}
row = d->insertRow(row);
d->setLayout(row, SpanningRole, layout);
invalidate();
}
/*!
\reimp
*/
void QFormLayout::addItem(QLayoutItem *item)
{
Q_D(QFormLayout);
int row = d->insertRow(d->m_matrix.rowCount());
d->setItem(row, FieldRole, item);
invalidate();
}
/*!
\reimp
*/
int QFormLayout::count() const
{
Q_D(const QFormLayout);
return d->m_things.count();
}
/*!
\reimp
*/
QLayoutItem *QFormLayout::itemAt(int index) const
{
Q_D(const QFormLayout);
if (QFormLayoutItem *formItem = d->m_things.value(index))
return formItem->item;
return 0;
}
/*!
\reimp
*/
QLayoutItem *QFormLayout::takeAt(int index)
{
Q_D(QFormLayout);
const int storageIndex = storageIndexFromLayoutItem(d->m_matrix, d->m_things.value(index));
if (storageIndex == -1) {
qWarning("QFormLayout::takeAt: Invalid index %d", index);
return 0;
}
int row, col;
QFormLayoutPrivate::ItemMatrix::storageIndexToPosition(storageIndex, &row, &col);
Q_ASSERT(d->m_matrix(row, col));
QFormLayoutItem *item = d->m_matrix(row, col);
Q_ASSERT(item);
d->m_things.removeAt(index);
d->m_matrix(row, col) = 0;
invalidate();
// grab ownership back from the QFormLayoutItem
QLayoutItem *i = item->item;
item->item = 0;
delete item;
if (QLayout *l = i->layout()) {
// sanity check in case the user passed something weird to QObject::setParent()
if (l->parent() == this)
l->setParent(0);
}
return i;
}
/*!
\reimp
*/
Qt::Orientations QFormLayout::expandingDirections() const
{
Q_D(const QFormLayout);
QFormLayoutPrivate *e = const_cast<QFormLayoutPrivate *>(d);
e->updateSizes();
Qt::Orientations o = 0;
if (e->expandHorizontal)
o = Qt::Horizontal;
if (e->expandVertical)
o |= Qt::Vertical;
return o;
}
/*!
\reimp
*/
bool QFormLayout::hasHeightForWidth() const
{
Q_D(const QFormLayout);
QFormLayoutPrivate *e = const_cast<QFormLayoutPrivate *>(d);
e->updateSizes();
return (d->has_hfw || rowWrapPolicy() == WrapLongRows);
}
/*!
\reimp
*/
int QFormLayout::heightForWidth(int width) const
{
Q_D(const QFormLayout);
if (!hasHeightForWidth())
return -1;
int leftMargin, topMargin, rightMargin, bottomMargin;
getContentsMargins(&leftMargin, &topMargin, &rightMargin, &bottomMargin);
int targetWidth = width - leftMargin - rightMargin;
if (!d->haveHfwCached(targetWidth)) {
QFormLayoutPrivate *dat = const_cast<QFormLayoutPrivate *>(d);
dat->setupVerticalLayoutData(targetWidth);
dat->setupHorizontalLayoutData(targetWidth);
dat->recalcHFW(targetWidth);
}
if (targetWidth == d->sh_width)
return d->hfw_sh_height + topMargin + bottomMargin;
else
return d->hfw_height + topMargin + bottomMargin;
}
/*!
\reimp
*/
void QFormLayout::setGeometry(const QRect &rect)
{
Q_D(QFormLayout);
if (d->dirty || rect != geometry()) {
QRect cr = rect;
int leftMargin, topMargin, rightMargin, bottomMargin;
getContentsMargins(&leftMargin, &topMargin, &rightMargin, &bottomMargin);
cr.adjust(+leftMargin, +topMargin, -rightMargin, -bottomMargin);
bool hfw = hasHeightForWidth();
d->setupVerticalLayoutData(cr.width());
d->setupHorizontalLayoutData(cr.width());
if (hfw && (!d->haveHfwCached(cr.width()) || d->hfwLayouts.size() != d->vLayoutCount))
d->recalcHFW(cr.width());
if (hfw) {
qGeomCalc(d->hfwLayouts, 0, d->vLayoutCount, cr.y(), cr.height());
d->arrangeWidgets(d->hfwLayouts, cr);
} else {
qGeomCalc(d->vLayouts, 0, d->vLayoutCount, cr.y(), cr.height());
d->arrangeWidgets(d->vLayouts, cr);
}
QLayout::setGeometry(rect);
}
}
/*!
\reimp
*/
QSize QFormLayout::sizeHint() const
{
Q_D(const QFormLayout);
if (!d->prefSize.isValid()) {
QFormLayoutPrivate *dat = const_cast<QFormLayoutPrivate *>(d);
dat->calcSizeHints();
}
return d->prefSize;
}
/*!
\reimp
*/
QSize QFormLayout::minimumSize() const
{
// ### fix minimumSize if hfw
Q_D(const QFormLayout);
if (!d->minSize.isValid()) {
QFormLayoutPrivate *dat = const_cast<QFormLayoutPrivate *>(d);
dat->calcSizeHints();
}
return d->minSize;
}
/*!
\reimp
*/
void QFormLayout::invalidate()
{
Q_D(QFormLayout);
d->dirty = true;
d->sizesDirty = true;
d->minSize = QSize();
d->prefSize = QSize();
d->formMaxWidth = -1;
d->hfw_width = -1;
d->sh_width = -1;
d->layoutWidth = -1;
d->hfw_sh_height = -1;
QLayout::invalidate();
}
/*!
Returns the number of rows in the form.
\sa QLayout::count()
*/
int QFormLayout::rowCount() const
{
Q_D(const QFormLayout);
return d->m_matrix.rowCount();
}
/*!
Returns the layout item in the given \a row with the specified \a
role (column). Returns 0 if there is no such item.
\sa QLayout::itemAt(), setItem()
*/
QLayoutItem *QFormLayout::itemAt(int row, ItemRole role) const
{
Q_D(const QFormLayout);
if (uint(row) >= uint(d->m_matrix.rowCount()))
return 0;
switch (role) {
case SpanningRole:
if (QFormLayoutItem *item = d->m_matrix(row, 1))
if (item->fullRow)
return item->item;
break;
case LabelRole:
case FieldRole:
if (QFormLayoutItem *item = d->m_matrix(row, (role == LabelRole) ? 0 : 1))
return item->item;
break;
}
return 0;
}
/*!
Retrieves the row and role (column) of the item at the specified
\a index. If \a index is out of bounds, *\a rowPtr is set to -1;
otherwise the row is stored in *\a rowPtr and the role is stored
in *\a rolePtr.
\sa itemAt(), count(), getLayoutPosition(), getWidgetPosition()
*/
void QFormLayout::getItemPosition(int index, int *rowPtr, ItemRole *rolePtr) const
{
Q_D(const QFormLayout);
int col = -1;
int row = -1;
const int storageIndex = storageIndexFromLayoutItem(d->m_matrix, d->m_things.value(index));
if (storageIndex != -1)
QFormLayoutPrivate::ItemMatrix::storageIndexToPosition(storageIndex, &row, &col);
if (rowPtr)
*rowPtr = row;
if (rolePtr && col != -1) {
const bool spanning = col == 1 && d->m_matrix(row, col)->fullRow;
if (spanning) {
*rolePtr = SpanningRole;
} else {
*rolePtr = ItemRole(col);
}
}
}
/*!
Retrieves the row and role (column) of the specified child \a
layout. If \a layout is not in the form layout, *\a rowPtr is set
to -1; otherwise the row is stored in *\a rowPtr and the role is stored
in *\a rolePtr.
*/
void QFormLayout::getLayoutPosition(QLayout *layout, int *rowPtr, ItemRole *rolePtr) const
{
int n = count();
int index = 0;
while (index < n) {
if (itemAt(index) == layout)
break;
++index;
}
getItemPosition(index, rowPtr, rolePtr);
}
/*!
Retrieves the row and role (column) of the specified \a widget in
the layout. If \a widget is not in the layout, *\a rowPtr is set
to -1; otherwise the row is stored in *\a rowPtr and the role is stored
in *\a rolePtr.
\sa getItemPosition(), itemAt()
*/
void QFormLayout::getWidgetPosition(QWidget *widget, int *rowPtr, ItemRole *rolePtr) const
{
getItemPosition(indexOf(widget), rowPtr, rolePtr);
}
// ### eliminate labelForField()
/*!
Returns the label associated with the given \a field.
\sa itemAt()
*/
QWidget *QFormLayout::labelForField(QWidget *field) const
{
Q_D(const QFormLayout);
int row;
ItemRole role;
getWidgetPosition(field, &row, &role);
if (row != -1 && role == FieldRole) {
if (QFormLayoutItem *label = d->m_matrix(row, LabelRole))
return label->widget();
}
return 0;
}
/*!
\overload
*/
QWidget *QFormLayout::labelForField(QLayout *field) const
{
Q_D(const QFormLayout);
int row;
ItemRole role;
getLayoutPosition(field, &row, &role);
if (row != -1 && role == FieldRole) {
if (QFormLayoutItem *label = d->m_matrix(row, LabelRole))
return label->widget();
}
return 0;
}
/*!
\property QFormLayout::fieldGrowthPolicy
\brief the way in which the form's fields grow
The default value depends on the widget or application style. For
QMacStyle, the default is FieldsStayAtSizeHint; for QCommonStyle
derived styles (like Plastique and Windows), the default
is ExpandingFieldsGrow; for Qt Extended styles, the default is
AllNonFixedFieldsGrow.
If none of the fields can grow and the form is resized, extra
space is distributed according to the current
\l{formAlignment}{form alignment}.
\sa formAlignment, rowWrapPolicy
*/
void QFormLayout::setFieldGrowthPolicy(FieldGrowthPolicy policy)
{
Q_D(QFormLayout);
if (FieldGrowthPolicy(d->fieldGrowthPolicy) != policy) {
d->fieldGrowthPolicy = policy;
invalidate();
}
}
QFormLayout::FieldGrowthPolicy QFormLayout::fieldGrowthPolicy() const
{
Q_D(const QFormLayout);
if (d->fieldGrowthPolicy == DefaultFieldGrowthPolicy) {
return QFormLayout::FieldGrowthPolicy(d->getStyle()->styleHint(QStyle::SH_FormLayoutFieldGrowthPolicy));
} else {
return QFormLayout::FieldGrowthPolicy(d->fieldGrowthPolicy);
}
}
/*!
\property QFormLayout::rowWrapPolicy
\brief the way in which the form's rows wrap
The default value depends on the widget or application style. For
Qt Extended styles and QS60Style, the default is WrapLongRows;
for the other styles, the default is DontWrapRows.
If you want to display each label above its associated field
(instead of next to it), set this property to WrapAllRows.
\sa fieldGrowthPolicy
*/
void QFormLayout::setRowWrapPolicy(RowWrapPolicy policy)
{
Q_D(QFormLayout);
if (RowWrapPolicy(d->rowWrapPolicy) != policy) {
d->rowWrapPolicy = policy;
invalidate();
}
}
QFormLayout::RowWrapPolicy QFormLayout::rowWrapPolicy() const
{
Q_D(const QFormLayout);
if (d->rowWrapPolicy == DefaultRowWrapPolicy) {
return QFormLayout::RowWrapPolicy(d->getStyle()->styleHint(QStyle::SH_FormLayoutWrapPolicy));
} else {
return QFormLayout::RowWrapPolicy(d->rowWrapPolicy);
}
}
/*!
\property QFormLayout::labelAlignment
\brief the horizontal alignment of the labels
The default value depends on the widget or application style. For
QCommonStyle derived styles, except for QPlastiqueStyle, the
default is Qt::AlignLeft; for the other styles, the default is
Qt::AlignRight.
\sa formAlignment
*/
void QFormLayout::setLabelAlignment(Qt::Alignment alignment)
{
Q_D(QFormLayout);
if (d->labelAlignment != alignment) {
d->labelAlignment = alignment;
invalidate();
}
}
Qt::Alignment QFormLayout::labelAlignment() const
{
Q_D(const QFormLayout);
if (!d->labelAlignment) {
return Qt::Alignment(d->getStyle()->styleHint(QStyle::SH_FormLayoutLabelAlignment));
} else {
return d->labelAlignment;
}
}
/*!
\property QFormLayout::formAlignment
\brief the alignment of the form layout's contents within the layout's geometry
The default value depends on the widget or application style. For
QMacStyle, the default is Qt::AlignHCenter | Qt::AlignTop; for the
other styles, the default is Qt::AlignLeft | Qt::AlignTop.
\sa labelAlignment, rowWrapPolicy
*/
void QFormLayout::setFormAlignment(Qt::Alignment alignment)
{
Q_D(QFormLayout);
if (d->formAlignment != alignment) {
d->formAlignment = alignment;
invalidate();
}
}
Qt::Alignment QFormLayout::formAlignment() const
{
Q_D(const QFormLayout);
if (!d->formAlignment) {
return Qt::Alignment(d->getStyle()->styleHint(QStyle::SH_FormLayoutFormAlignment));
} else {
return d->formAlignment;
}
}
/*!
\property QFormLayout::horizontalSpacing
\brief the spacing between widgets that are laid out side by side
By default, if no value is explicitly set, the layout's horizontal
spacing is inherited from the parent layout, or from the style settings
for the parent widget.
\sa verticalSpacing, QStyle::pixelMetric(), {QStyle::}{PM_LayoutHorizontalSpacing}
*/
void QFormLayout::setHorizontalSpacing(int spacing)
{
Q_D(QFormLayout);
if (spacing != d->hSpacing) {
d->hSpacing = spacing;
invalidate();
}
}
int QFormLayout::horizontalSpacing() const
{
Q_D(const QFormLayout);
if (d->hSpacing >= 0) {
return d->hSpacing;
} else {
return qSmartSpacing(this, QStyle::PM_LayoutHorizontalSpacing);
}
}
/*!
\property QFormLayout::verticalSpacing
\brief the spacing between widgets that are laid out vertically
By default, if no value is explicitly set, the layout's vertical spacing is
inherited from the parent layout, or from the style settings for the parent
widget.
\sa horizontalSpacing, QStyle::pixelMetric(), {QStyle::}{PM_LayoutHorizontalSpacing}
*/
void QFormLayout::setVerticalSpacing(int spacing)
{
Q_D(QFormLayout);
if (spacing != d->vSpacing) {
d->vSpacing = spacing;
invalidate();
}
}
int QFormLayout::verticalSpacing() const
{
Q_D(const QFormLayout);
if (d->vSpacing >= 0) {
return d->vSpacing;
} else {
return qSmartSpacing(this, QStyle::PM_LayoutVerticalSpacing);
}
}
/*!
This function sets both the vertical and horizontal spacing to
\a spacing.
\sa setVerticalSpacing(), setHorizontalSpacing()
*/
void QFormLayout::setSpacing(int spacing)
{
Q_D(QFormLayout);
d->vSpacing = d->hSpacing = spacing;
invalidate();
}
/*!
If the vertical spacing is equal to the horizontal spacing,
this function returns that value; otherwise it returns -1.
\sa setSpacing(), verticalSpacing(), horizontalSpacing()
*/
int QFormLayout::spacing() const
{
int hSpacing = horizontalSpacing();
if (hSpacing == verticalSpacing()) {
return hSpacing;
} else {
return -1;
}
}
void QFormLayoutPrivate::arrangeWidgets(const QVector<QLayoutStruct>& layouts, QRect &rect)
{
Q_Q(QFormLayout);
int i;
const int rr = m_matrix.rowCount();
QWidget *w = q->parentWidget();
Qt::LayoutDirection layoutDirection = w ? w->layoutDirection() : QApplication::layoutDirection();
Qt::Alignment formAlignment = fixedAlignment(q->formAlignment(), layoutDirection);
int leftOffset = 0;
int delta = rect.width() - formMaxWidth;
if (formAlignment & (Qt::AlignHCenter | Qt::AlignRight) && delta > 0) {
leftOffset = delta;
if (formAlignment & Qt::AlignHCenter)
leftOffset >>= 1;
}
for (i = 0; i < rr; ++i) {
QFormLayoutItem *label = m_matrix(i, 0);
QFormLayoutItem *field = m_matrix(i, 1);
if (label) {
int height = layouts.at(label->vLayoutIndex).size;
if ((label->expandingDirections() & Qt::Vertical) == 0) {
/*
If the field on the right-hand side is tall,
we want the label to be top-aligned, but not too
much. So we introduce a 7 / 4 factor so that it
gets some extra pixels at the top.
*/
height = qMin(height,
qMin(label->sizeHint.height() * 7 / 4,
label->maxSize.height()));
}
QSize sz(qMin(label->layoutWidth, label->sizeHint.width()), height);
int x = leftOffset + rect.x() + label->layoutPos;
if (fixedAlignment(q->labelAlignment(), layoutDirection) & Qt::AlignRight)
x += label->layoutWidth - sz.width();
QPoint p(x, layouts.at(label->vLayoutIndex).pos);
// ### expansion & sizepolicy stuff
label->setGeometry(QStyle::visualRect(layoutDirection, rect, QRect(p, sz)));
}
if (field) {
QSize sz(field->layoutWidth, layouts.at(field->vLayoutIndex).size);
QPoint p(field->layoutPos + leftOffset + rect.x(), layouts.at(field->vLayoutIndex).pos);
/*
if ((field->widget() && field->widget()->sizePolicy().horizontalPolicy() & (QSizePolicy::GrowFlag | QSizePolicy::ExpandFlag | QSizePolicy::IgnoreFlag))
|| (field->layout() && sz.width() < field->maxSize.width())) {
sz.rwidth() = field->layoutWidth;
}
*/
if (field->maxSize.isValid())
sz = sz.boundedTo(field->maxSize);
field->setGeometry(QStyle::visualRect(layoutDirection, rect, QRect(p, sz)));
}
}
}
/*!
Sets the widget in the given \a row for the given \a role to \a widget, extending the
layout with empty rows if necessary.
If the cell is already occupied, the \a widget is not inserted and an error message is
sent to the console.
\bold{Note:} For most applications, addRow() or insertRow() should be used instead of setWidget().
\sa setLayout()
*/
void QFormLayout::setWidget(int row, ItemRole role, QWidget *widget)
{
Q_D(QFormLayout);
int rowCnt = rowCount();
if (row >= rowCnt)
d->insertRows(rowCnt, row - rowCnt + 1);
d->setWidget(row, role, widget);
}
/*!
Sets the sub-layout in the given \a row for the given \a role to \a layout, extending the
form layout with empty rows if necessary.
If the cell is already occupied, the \a layout is not inserted and an error message is
sent to the console.
\bold{Note:} For most applications, addRow() or insertRow() should be used instead of setLayout().
\sa setWidget()
*/
void QFormLayout::setLayout(int row, ItemRole role, QLayout *layout)
{
Q_D(QFormLayout);
int rowCnt = rowCount();
if (row >= rowCnt)
d->insertRows(rowCnt, row - rowCnt + 1);
d->setLayout(row, role, layout);
}
/*!
Sets the item in the given \a row for the given \a role to \a item, extending the
layout with empty rows if necessary.
If the cell is already occupied, the \a item is not inserted and an error message is
sent to the console.
The \a item spans both columns.
\warning Do not use this function to add child layouts or child
widget items. Use setLayout() or setWidget() instead.
\sa setLayout()
*/
void QFormLayout::setItem(int row, ItemRole role, QLayoutItem *item)
{
Q_D(QFormLayout);
int rowCnt = rowCount();
if (row >= rowCnt)
d->insertRows(rowCnt, row - rowCnt + 1);
d->setItem(row, role, item);
}
/*!
\internal
*/
void QFormLayout::resetFieldGrowthPolicy()
{
Q_D(QFormLayout);
d->fieldGrowthPolicy = DefaultFieldGrowthPolicy;
}
/*!
\internal
*/
void QFormLayout::resetRowWrapPolicy()
{
Q_D(QFormLayout);
d->rowWrapPolicy = DefaultRowWrapPolicy;
}
/*!
\internal
*/
void QFormLayout::resetFormAlignment()
{
Q_D(QFormLayout);
d->formAlignment = 0;
}
/*!
\internal
*/
void QFormLayout::resetLabelAlignment()
{
Q_D(QFormLayout);
d->labelAlignment = 0;
}
#if 0
void QFormLayout::dump() const
{
Q_D(const QFormLayout);
for (int i = 0; i < rowCount(); ++i) {
for (int j = 0; j < 2; ++j) {
qDebug("m_matrix(%d, %d) = %p", i, j, d->m_matrix(i, j));
}
}
for (int i = 0; i < d->m_things.count(); ++i)
qDebug("m_things[%d] = %p", i, d->m_things.at(i));
}
#endif
QT_END_NAMESPACE
|