summaryrefslogtreecommitdiffstats
path: root/src/widgets/qtabbar.cpp
blob: 33a19d825b99644b6785d01dea1a3862b829b964 (plain)
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
/****************************************************************************
**
** Implementation of TQTab and TQTabBar classes
**
** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the widgets module of the TQt 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 TQt 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.TQPL
** included in the packaging of this file.  Licensees holding valid TQt
** Commercial licenses may use this file in accordance with the TQt
** 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.
**
**********************************************************************/

#include "ntqtabbar.h"
#ifndef TQT_NO_TABBAR
#include "ntqaccel.h"
#include "ntqbitmap.h"
#include "ntqtoolbutton.h"
#include "ntqtooltip.h"
#include "ntqapplication.h"
#include "ntqstyle.h"
#include "ntqpainter.h"
#include "ntqiconset.h"
#include "ntqcursor.h"
#include "../kernel/qinternal_p.h"
#if defined(QT_ACCESSIBILITY_SUPPORT)
#include "ntqaccessible.h"
#endif

#ifdef Q_WS_MACX
#include <qmacstyle_mac.h>
#endif


/*!
    \class TQTab ntqtabbar.h
    \brief The TQTab class provides the structures in a TQTabBar.

    \ingroup advanced

    This class is used for custom TQTabBar tab headings.

    \sa TQTabBar
*/


/*!
    Constructs an empty tab. All fields are set to empty.
*/

TQTab::TQTab()
    : enabled( TRUE ),
      id ( 0 ),
      iconset( 0 ),
      tb( 0 )
{
}

/*!
    Constructs a tab with the text \a text.
*/

TQTab::TQTab( const TQString &text )
    : label( text ),
      enabled( TRUE ),
      id( 0 ),
      iconset( 0 ),
      tb( 0 )
{
}

/*!
    Constructs a tab with an \a icon and the text, \a text.
*/

TQTab::TQTab( const TQIconSet& icon, const TQString& text )
    : label( text ),
      enabled( TRUE ),
      id( 0 ),
      iconset( new TQIconSet(icon) ),
      tb( 0 )
{
}

/*!
    \fn TQString TQTab::text() const

    Returns the text of the TQTab label.
*/

/*!
    \fn TQIconSet TQTab::iconSet() const

    Return the TQIconSet of the TQTab.
*/

/*!
    \fn void TQTab::setRect( const TQRect &rect )

    Set the TQTab TQRect to \a rect.
*/

/*!
    \fn TQRect TQTab::rect() const

    Return the TQRect for the TQTab.
*/

/*!
    \fn void TQTab::setEnabled( bool enable )

    If \a enable is TRUE enable the TQTab, otherwise disable it.
*/

/*!
    \fn bool TQTab::isEnabled() const

    Returns TRUE if the TQTab is enabled; otherwise returns FALSE.
*/

/*!
    \fn void TQTab::setIdentifier( int i )

    Set the identifier for the TQTab to \a i. Each TQTab's identifier
    within a TQTabBar must be unique.
*/

/*!
    \fn int TQTab::identifier() const

    Return the TQTab's identifier.
*/



/*!
    Destroys the tab and frees up all allocated resources.
*/

TQTab::~TQTab()
{
    delete iconset;
    tb = 0;
}

/*!
    \class TQTabBar ntqtabbar.h
    \brief The TQTabBar class provides a tab bar, e.g. for use in tabbed dialogs.

    \ingroup advanced

    TQTabBar is straightforward to use; it draws the tabs using one of
    the predefined \link TQTabBar::Shape shapes\endlink, and emits a
    signal when a tab is selected. It can be subclassed to tailor the
    look and feel. TQt also provides a ready-made \l{TQTabWidget} and a
    \l{TQTabDialog}.

    The choice of tab shape is a matter of taste, although tab dialogs
    (for preferences and similar) invariably use \c RoundedAbove;
    nobody uses \c TriangularAbove. Tab controls in windows other than
    dialogs almost always use either \c RoundedBelow or \c
    TriangularBelow. Many spreadsheets and other tab controls in which
    all the pages are essentially similar use \c TriangularBelow,
    whereas \c RoundedBelow is used mostly when the pages are
    different (e.g. a multi-page tool palette).

    The most important part of TQTabBar's API is the selected() signal.
    This is emitted whenever the selected page changes (even at
    startup, when the selected page changes from 'none'). There is
    also a slot, setCurrentTab(), which can be used to select a page
    programmatically.

    TQTabBar creates automatic accelerator keys in the manner of
    TQButton; e.g. if a tab's label is "\&Graphics", Alt+G becomes an
    accelerator key for switching to that tab.

    The following virtual functions may need to be reimplemented:
    \list
    \i paint() paints a single tab. paintEvent() calls paint() for
    each tab so that any overlap will look right.
    \i addTab() creates a new tab and adds it to the bar.
    \i selectTab() decides which tab, if any, the user selects with the mouse.
    \endlist

    The index of the current tab is returned by currentTab(). The tab
    with a particular index is returned by tabAt(), the tab with a
    particular id is returned by tab(). The index of a tab is returned
    by indexOf(). The current tab can be set by index or tab pointer
    using one of the setCurrentTab() functions.

    <img src=qtabbar-m.png> <img src=qtabbar-w.png>
*/

/*!
    \enum TQTabBar::Shape

    This enum type lists the built-in shapes supported by TQTabBar:

    \value RoundedAbove  the normal rounded look above the pages

    \value RoundedBelow  the normal rounded look below the pages

    \value TriangularAbove  triangular tabs above the pages (very
    unusual; included for completeness)

    \value TriangularBelow  triangular tabs similar to those used in
    the Excel spreadsheet, for example
*/

class TQTabBarToolTip;

struct TQTabPrivate {
    int id;
    int focus;
#ifndef TQT_NO_ACCEL
    TQAccel * a;
#endif
    TQTab *pressed;
    TQTabBar::Shape s;
    TQToolButton* rightB;
    TQToolButton* leftB;
    int btnWidth;
    bool  scrolls;
    TQTabBarToolTip * toolTips;
};

#ifndef TQT_NO_TOOLTIP
/* \internal
*/
class TQTabBarToolTip : public TQToolTip
{
public:
    TQTabBarToolTip( TQWidget * parent )
	: TQToolTip( parent ) {}
    virtual ~TQTabBarToolTip() {}

    void add( TQTab * tab, const TQString & tip )
    {
	tabTips.replace( tab, tip );
    }

    void remove( TQTab * tab )
    {
	tabTips.erase( tab );
    }

    TQString tipForTab( TQTab * tab ) const
    {
	TQMapConstIterator<TQTab *, TQString> it;
	it = tabTips.find( tab );
	if ( it != tabTips.end() )
	    return it.data();
	else
	    return TQString();
    }

protected:
    void maybeTip( const TQPoint & p )
    {
	TQTabBar * tb = (TQTabBar *) parentWidget();
	if ( !tb )
	    return;

	// check if the scroll buttons in the tab bar are visible -
	// don't display any tips if the pointer is over one of them
	TQRect rectL, rectR;
	rectL.setRect( tb->d->leftB->x(), tb->d->leftB->y(),
		       tb->d->leftB->width(), tb->d->leftB->height() );
	rectR.setRect( tb->d->rightB->x(), tb->d->rightB->y(),
		       tb->d->rightB->width(), tb->d->rightB->height() );
	if ( tb->d->scrolls && (rectL.contains( p ) || rectR.contains( p )) )
	     return;

#ifndef TQT_NO_TOOLTIP
	// find and show the tool tip for the tab under the point p
	TQMapIterator<TQTab *, TQString> it;
	for ( it = tabTips.begin(); it != tabTips.end(); ++it ) {
	    if ( it.key()->rect().contains( p ) )
		tip( it.key()->rect(), it.data() );
	}
#endif
    }

private:
    TQMap<TQTab *, TQString> tabTips;
};
#endif

/*!
    \fn void TQTabBar::selected( int id )

    TQTabBar emits this signal whenever any tab is selected, whether by
    the program or by the user. The argument \a id is the id of the
    tab as returned by addTab().

    show() is guaranteed to emit this signal; you can display your
    page in a slot connected to this signal.
*/

/*!
    \fn void TQTabBar::layoutChanged()

    TQTabBar emits the signal whenever the layout of the tab bar has
    been recalculated, for example when the contents of a tab change.
*/

/*!
    Constructs a new, empty tab bar; the \a parent and \a name
    arguments are passed on to the TQWidget constructor.
*/

TQTabBar::TQTabBar( TQWidget * parent, const char *name )
    : TQWidget( parent, name, WNoAutoErase | WNoMousePropagation  ), l(NULL), hoverTab( 0 )
{
    d = new TQTabPrivate;
    d->pressed = 0;
    d->id = 0;
    d->focus = 0;
    d->toolTips = 0;
#ifndef TQT_NO_ACCEL
    d->a = new TQAccel( this, "tab accelerators" );
    connect( d->a, TQ_SIGNAL(activated(int)), this, TQ_SLOT(setCurrentTab(int)) );
    connect( d->a, TQ_SIGNAL(activatedAmbiguously(int)), this, TQ_SLOT(setCurrentTab(int)) );
#endif
    d->s = RoundedAbove;
    d->scrolls = FALSE;
    d->leftB = new TQToolButton( LeftArrow, this, "qt_left_btn" );
    connect( d->leftB, TQ_SIGNAL( clicked() ), this, TQ_SLOT( scrollTabs() ) );
    d->leftB->hide();
    d->rightB = new TQToolButton( RightArrow, this, "qt_right_btn" );
    connect( d->rightB, TQ_SIGNAL( clicked() ), this, TQ_SLOT( scrollTabs() ) );
    d->rightB->hide();
    d->btnWidth = style().pixelMetric(TQStyle::PM_TabBarScrollButtonWidth, this);
    l = new TQPtrList<TQTab>;
    lstatic = new TQPtrList<TQTab>;
    lstatic->setAutoDelete( TRUE );
    setFocusPolicy( TabFocus );
    setSizePolicy( TQSizePolicy( TQSizePolicy::Preferred, TQSizePolicy::Fixed ) );
}


/*!
    Destroys the tab control, freeing memory used.
*/

TQTabBar::~TQTabBar()
{
#ifndef TQT_NO_TOOLTIP
    if ( d->toolTips )
	delete d->toolTips;
#endif
    delete d;
    d = 0;
    delete l;
    l = 0;
    delete lstatic;
    lstatic = 0;
}


/*!
    Adds the tab, \a newTab, to the tab control.

    Sets \a newTab's id to a new id and places the tab just to the
    right of the existing tabs. If the tab's label contains an
    ampersand, the letter following the ampersand is used as an
    accelerator for the tab, e.g. if the label is "Bro\&wse" then
    Alt+W becomes an accelerator which will move the focus to this
    tab. Returns the id.

    \sa insertTab()
*/

int TQTabBar::addTab( TQTab * newTab )
{
    return insertTab( newTab );
}


/*!
    Inserts the tab, \a newTab, into the tab control.

    If \a index is not specified, the tab is simply appended.
    Otherwise it's inserted at the specified position.

    Sets \a newTab's id to a new id. If the tab's label contains an
    ampersand, the letter following the ampersand is used as an
    accelerator for the tab, e.g. if the label is "Bro\&wse" then
    Alt+W becomes an accelerator which will move the focus to this
    tab. Returns the id.

    \sa addTab()
*/

int TQTabBar::insertTab( TQTab * newTab, int index )
{
    newTab->id = d->id++;
    if ( !tab( d->focus ) )
	d->focus = newTab->id;

    newTab->setTabBar( this );
    l->insert( 0, newTab );
    if ( index < 0 || index > int(lstatic->count()) )
	lstatic->append( newTab );
    else
	lstatic->insert( index, newTab );

    layoutTabs();
    updateArrowButtons();
    makeVisible( tab( currentTab() ) );

#ifndef TQT_NO_ACCEL
    int p = TQAccel::shortcutKey( newTab->label );
    if ( p )
	d->a->insertItem( p, newTab->id );
#endif

    return newTab->id;
}


/*!
    Removes tab \a t from the tab control, and deletes the tab.
*/
void TQTabBar::removeTab( TQTab * t )
{
    //#### accelerator labels??
#ifndef TQT_NO_TOOLTIP
    if ( d->toolTips )
	d->toolTips->remove( t );
#endif
#ifndef TQT_NO_ACCEL
    if ( d->a )
	d->a->removeItem( t->id );
#endif
    bool updateFocus = t->id == d->focus;
    // remove the TabBar Reference
    if(d->pressed == t)
	d->pressed = 0;
    t->setTabBar( 0 );
    l->remove( t );
    lstatic->remove( t );
    layoutTabs();
    updateArrowButtons();
    makeVisible( tab( currentTab() ) );
    if ( updateFocus )
	d->focus = currentTab();
    update();
}


/*!
    Enables tab \a id if \a enabled is TRUE or disables it if \a
    enabled is FALSE. If \a id is currently selected,
    setTabEnabled(FALSE) makes another tab selected.

    setTabEnabled() updates the display if this causes a change in \a
    id's status.

    \sa update(), isTabEnabled()
*/

void TQTabBar::setTabEnabled( int id, bool enabled )
{
    TQTab * t;
    for( t = l->first(); t; t = l->next() ) {
	if ( t && t->id == id ) {
	    if ( t->enabled != enabled ) {
		t->enabled = enabled;
#ifndef TQT_NO_ACCEL
		d->a->setItemEnabled( t->id, enabled );
#endif
		TQRect r( t->r );
		if ( !enabled && id == currentTab() ) {
		    TQPoint p1( t->r.center() ), p2;
		    int m = 2147483647;
		    int distance;
		    // look for the closest enabled tab - measure the
		    // distance between the centers of the two tabs
		    for( TQTab * n = l->first(); n; n = l->next() ) {
			if ( n->enabled ) {
			    p2 = n->r.center();
			    distance = (p2.x() - p1.x())*(p2.x() - p1.x()) +
				       (p2.y() - p1.y())*(p2.y() - p1.y());
			    if ( distance < m ) {
				t = n;
				m = distance;
			    }
			}
		    }
		    if ( t->enabled ) {
			r = r.unite( t->r );
			l->append( l->take( l->findRef( t ) ) );
			emit selected( t->id );
		    }
		}
		repaint( r, FALSE );
	    }
	    return;
	}
    }
}


/*!
    Returns TRUE if the tab with id \a id exists and is enabled;
    otherwise returns FALSE.

    \sa setTabEnabled()
*/

bool TQTabBar::isTabEnabled( int id ) const
{
    TQTab * t = tab( id );
    if ( t )
	return t->enabled;
    return FALSE;
}



/*!
    \reimp
*/
TQSize TQTabBar::sizeHint() const
{
    TQSize sz(0, 0);
    if ( TQTab * t = l->first() ) {
	TQRect r( t->r );
	while ( (t = l->next()) != 0 )
	    r = r.unite( t->r );
	sz = r.size();
    }
    return sz.expandedTo(TQApplication::globalStrut());
}

/*!
    \reimp
*/

TQSize TQTabBar::minimumSizeHint() const
{
    if(style().styleHint( TQStyle::SH_TabBar_PreferNoArrows, this ))
	return sizeHint();
    return TQSize( d->rightB->sizeHint().width() * 2 + 75, sizeHint().height() );
}

/*!
    Paints the tab \a t using painter \a p. If and only if \a selected
    is TRUE, \a t is drawn currently selected.

    This virtual function may be reimplemented to change the look of
    TQTabBar. If you decide to reimplement it, you may also need to
    reimplement sizeHint().
*/

void TQTabBar::paint( TQPainter * p, TQTab * t, bool selected ) const
{
	TQStyle::SFlags flags = TQStyle::Style_Default;
	
	if (isEnabled() && t->isEnabled()) {
		flags |= TQStyle::Style_Enabled;
	}
	if (topLevelWidget() == tqApp->activeWindow()) {
		flags |= TQStyle::Style_Active;
	}
	if ( selected ) {
		flags |= TQStyle::Style_Selected;
	}
	else if (t == d->pressed) {
		flags |= TQStyle::Style_Sunken;
	}

	//selection flags
	if (t->rect().contains(mapFromGlobal(TQCursor::pos()))) {
		flags |= TQStyle::Style_MouseOver;
	}
	style().drawControl( TQStyle::CE_TabBarTab, p, this, t->rect(), colorGroup(), flags, TQStyleOption(t, hoverTab) );

	TQRect r( t->r );
	p->setFont( font() );

	int iw = 0;
	int ih = 0;
	if ( t->iconset != 0 ) {
		iw = t->iconset->pixmap( TQIconSet::Small, TQIconSet::Normal ).width() + 4;
		ih = t->iconset->pixmap( TQIconSet::Small, TQIconSet::Normal ).height();
	}
	TQFontMetrics fm = p->fontMetrics();
	int fw = fm.width( t->label );
	fw -= t->label.contains('&') * fm.width('&');
	fw += t->label.contains("&&") * fm.width('&');
	int w = iw + fw + 4;
	int h = TQMAX(fm.height() + 4, ih );
	int offset = 3;
#ifdef Q_WS_MAC
	if (::tqt_cast<TQMacStyle *>(&style())) {
		offset = 0;
	}
#endif
	paintLabel( p, TQRect( r.left() + (r.width()-w)/2 - offset, r.top() + (r.height()-h)/2, w, h ), t, t->id == keyboardFocusTab() );
}

/*!
    Paints the label of tab \a t centered in rectangle \a br using
    painter \a p. A focus indication is drawn if \a has_focus is TRUE.
*/

void TQTabBar::paintLabel( TQPainter* p, const TQRect& br,
			  TQTab* t, bool has_focus ) const
{
	TQRect r = br;
	bool selected = currentTab() == t->id;
	if ( t->iconset) {
		// the tab has an iconset, draw it in the right mode
		TQIconSet::Mode mode = (t->enabled && isEnabled())
		? TQIconSet::Normal : TQIconSet::Disabled;
		if ( mode == TQIconSet::Normal && has_focus )
		mode = TQIconSet::Active;
		TQPixmap pixmap = t->iconset->pixmap( TQIconSet::Small, mode );
		int pixw = pixmap.width();
		int pixh = pixmap.height();
		r.setLeft( r.left() + pixw + 4 );
		r.setRight( r.right() + 2 );
	
		int xoff = 0, yoff = 0;
		if(!selected) {
			xoff = style().pixelMetric(TQStyle::PM_TabBarTabShiftHorizontal, this);
			yoff = style().pixelMetric(TQStyle::PM_TabBarTabShiftVertical, this);
		}
		p->drawPixmap( br.left() + 2 + xoff, br.center().y()-pixh/2 + yoff, pixmap );
	}

	TQStyle::SFlags flags = TQStyle::Style_Default;
	
	if (isEnabled() && t->isEnabled()) {
		flags |= TQStyle::Style_Enabled;
	}
	if (has_focus) {
		flags |= TQStyle::Style_HasFocus;
	}
	if ( selected ) {
		flags |= TQStyle::Style_Selected;
	}
	else if(t == d->pressed) {
		flags |= TQStyle::Style_Sunken;
	}
	if(t->rect().contains(mapFromGlobal(TQCursor::pos()))) {
		flags |= TQStyle::Style_MouseOver;
	}
	style().drawControl( TQStyle::CE_TabBarLabel, p, this, r,
				t->isEnabled() ? colorGroup(): palette().disabled(),
				flags, TQStyleOption(t, hoverTab) );
}


/*!
    Repaints the tab row. All the painting is done by paint();
    paintEvent() only decides which tabs need painting and in what
    order. The event is passed in \a e.

    \sa paint()
*/

void TQTabBar::paintEvent( TQPaintEvent * e )
{
    if ( e->rect().isNull() )
	return;

    TQSharedDoubleBuffer buffer( this, e->rect() );

    TQTab * t;
    t = l->first();
    do {
	TQTab * n = l->next();
	if ( t && t->r.intersects( e->rect() ) ) {
	    paint( buffer.painter(), t, n == 0 );
	}
	t = n;
    } while ( t != 0 );

    if ( d->scrolls && lstatic->first()->r.left() < 0 ) {
	TQPointArray a;
	int h = height();
	if ( d->s == RoundedAbove ) {
	    buffer.painter()->fillRect( 0, 3, 4, h-5,
			colorGroup().brush( TQColorGroup::Background ) );
	    a.setPoints( 5,  0,2,  3,h/4, 0,h/2, 3,3*h/4, 0,h );
	} else if ( d->s == RoundedBelow ) {
	    buffer.painter()->fillRect( 0, 2, 4, h-5,
			colorGroup().brush( TQColorGroup::Background ) );
	    a.setPoints( 5,  0,0,  3,h/4, 0,h/2, 3,3*h/4, 0,h-3 );
	}

	if ( !a.isEmpty() ) {
	    buffer.painter()->setPen( colorGroup().light() );
	    buffer.painter()->drawPolyline( a );
	    a.translate( 1, 0 );
	    buffer.painter()->setPen( colorGroup().midlight() );
	    buffer.painter()->drawPolyline( a );
	}
    }
}


/*!
    This virtual function is called by the mouse event handlers to
    determine which tab is pressed. The default implementation returns
    a pointer to the tab whose bounding rectangle contains \a p, if
    exactly one tab's bounding rectangle contains \a p. Otherwise it
    returns 0.

    \sa mousePressEvent() mouseReleaseEvent()
*/

TQTab * TQTabBar::selectTab( const TQPoint & p ) const
{
    TQTab * selected = 0;
    bool moreThanOne = FALSE;

    TQPtrListIterator<TQTab> i( *l );
    while( i.current() ) {
	TQTab * t = i.current();
	++i;

	if ( t && t->r.contains( p ) ) {
	    if ( selected )
		moreThanOne = TRUE;
	    else
		selected = t;
	}
    }

    return moreThanOne ? 0 : selected;
}


/*!
    \reimp
*/
void TQTabBar::mousePressEvent( TQMouseEvent * e )
{
    if ( e->button() != LeftButton ) {
	e->ignore();
	return;
    }
    TQTab *t = selectTab( e->pos() );
    if ( t && t->enabled ) {
	d->pressed = t;
	if(e->type() == style().styleHint( TQStyle::SH_TabBar_SelectMouseType, this ))
	    setCurrentTab( t );
	else
	    repaint(t->rect(), FALSE);
    }
}


/*!
    \reimp
*/

void TQTabBar::mouseMoveEvent ( TQMouseEvent *e )
{
	TQTab *t = selectTab( e->pos() );

	// Repaint hover indicator(s)
	// Also, avoid unnecessary repaints which otherwise would occour on every MouseMove event causing high cpu load
	bool forceRepaint = true;
	if (hoverTab == t) {
		forceRepaint = false;
	}
	hoverTab = t;
	if (forceRepaint) {
		repaint(false);
	}

	if ( e->state() != LeftButton ) {
		e->ignore();
		return;
	}

	if(style().styleHint( TQStyle::SH_TabBar_SelectMouseType, this ) == TQEvent::MouseButtonRelease) {
		if(t != d->pressed) {
			if (d->pressed) {
				if (!forceRepaint) {
					repaint(d->pressed->rect(), FALSE);
				}
			}
			if ((d->pressed = t)) {
				if (!forceRepaint) {
					repaint(t->rect(), FALSE);
				}
			}
		}
	}
}

/*!
    \reimp
*/

void TQTabBar::mouseReleaseEvent( TQMouseEvent *e )
{
	if (e->button() != LeftButton) {
		e->ignore();
	}
	
	if (d->pressed) {
		TQTab *t = selectTab( e->pos() ) == d->pressed ? d->pressed : 0;
		d->pressed = 0;
		if(t && t->enabled && e->type() == style().styleHint( TQStyle::SH_TabBar_SelectMouseType, this )) {
			setCurrentTab( t );
		}
	}
}

void TQTabBar::enterEvent( TQEvent * )
{
	hoverTab = 0;
}

void TQTabBar::leaveEvent( TQEvent * )
{
	hoverTab = 0;
}

/*!
    \reimp
*/
void TQTabBar::show()
{
    //  ensures that one tab is selected.
    TQTab * t = l->last();
    TQWidget::show();

    if ( t )
	emit selected( t->id );
}

/*!
    \property TQTabBar::currentTab
    \brief the id of the tab bar's visible tab

    If no tab page is currently visible, the property's value is -1.
    Even if the property's value is not -1, you cannot assume that the
    user can see the relevant page, or that the tab is enabled. When
    you need to display something the value of this property
    represents the best page to display.

    When this property is set to \e id, it will raise the tab with the
    id \e id and emit the selected() signal.

    \sa selected() isTabEnabled()
*/

int TQTabBar::currentTab() const
{
    const TQTab * t = 0;
    if (l) {
        t = l->getLast();
    }

    return t ? t->id : -1;
}

void TQTabBar::setCurrentTab( int id )
{
    setCurrentTab( tab( id ) );
}


/*!
    \overload

    Raises \a tab and emits the selected() signal unless the tab was
    already current.

    \sa currentTab() selected()
*/

void TQTabBar::setCurrentTab( TQTab * tab )
{
    if ( tab && l ) {
	if ( l->last() == tab )
	    return;

	TQRect r = l->last()->r;
	if ( l->findRef( tab ) >= 0 )
	    l->append( l->take() );

	d->focus = tab->id;

	setMicroFocusHint( tab->rect().x(), tab->rect().y(), tab->rect().width(), tab->rect().height(), FALSE );

	if ( tab->r.intersects( r ) ) {
	    repaint( r.unite( tab->r ), FALSE );
	} else {
#ifdef Q_WS_MACX
            update();
#else
	    repaint( r, FALSE );
	    repaint( tab->r, FALSE );
#endif
	}
	makeVisible( tab );
	emit selected( tab->id );

#ifdef QT_ACCESSIBILITY_SUPPORT
	TQAccessible::updateAccessibility( this, indexOf(tab->id)+1, TQAccessible::Focus );
#endif
    }
}

/*!
    \property TQTabBar::keyboardFocusTab
    \brief the id of the tab that has the keyboard focus

    This property contains the id of the tab that has the keyboard
    focus or -1 if the tab bar does not have the keyboard focus.
*/

int TQTabBar::keyboardFocusTab() const
{
    return hasFocus() ? d->focus : -1;
}


/*!
    \reimp
*/
void TQTabBar::keyPressEvent( TQKeyEvent * e )
{
    //   The right and left arrow keys move a selector, the spacebar
    //   makes the tab with the selector active.  All other keys are
    //   ignored.

    int old = d->focus;

    bool reverse = TQApplication::reverseLayout();
    if ( ( !reverse && e->key() == Key_Left ) || ( reverse && e->key() == Key_Right ) ) {
	// left - skip past any disabled ones
	if ( d->focus >= 0 ) {
	    TQTab * t = lstatic->last();
	    while ( t && t->id != d->focus )
		t = lstatic->prev();
	    do {
		t = lstatic->prev();
	    } while ( t && !t->enabled);
	    if (t)
		d->focus = t->id;
	}
	if ( d->focus < 0 )
	    d->focus = old;
    } else if ( ( !reverse && e->key() == Key_Right ) || ( reverse && e->key() == Key_Left ) ) {
	TQTab * t = lstatic->first();
	while ( t && t->id != d->focus )
	    t = lstatic->next();
	do {
	    t = lstatic->next();
	} while ( t && !t->enabled);

	if (t)
	    d->focus = t->id;
	if ( d->focus >= d->id )
	    d->focus = old;
    } else {
	// other keys - ignore
	e->ignore();
	return;
    }

    // if the focus moved, repaint and signal
    if ( old != d->focus ) {
	setCurrentTab( d->focus );
    }
}


/*!
    Returns the tab with id \a id or 0 if there is no such tab.

    \sa count()
*/

TQTab * TQTabBar::tab( int id ) const
{
    if (l) {
	TQTab * t;
	for( t = l->first(); t; t = l->next() )
	    if ( t && t->id == id )
		return t;
    }
    return 0;
}


/*!
    Returns the tab at position \a index.

    \sa indexOf()
*/

TQTab * TQTabBar::tabAt( int index ) const
{
    TQTab * t;
    TQPtrList<TQTab> internalList = *lstatic;
    t = internalList.at( index );
    return t;
}


/*!
    Returns the position index of the tab with id \a id or -1 if no
    tab has this \a id.

    \sa tabAt()
*/
int TQTabBar::indexOf( int id ) const
{
    TQTab * t;
    TQPtrList<TQTab> internalList = *lstatic;
    int idx = 0;
    for( t = internalList.first(); t; t = internalList.next() ) {
	if ( t && t->id == id )
	    return idx;
	idx++;
    }
    return -1;
}


/*!
    \property TQTabBar::count
    \brief the number of tabs in the tab bar

    \sa tab()
*/
int TQTabBar::count() const
{
    if (l) {
	return l->count();
    }
    return 0;
}


/*!
    The list of TQTab objects in the tab bar.

    This list is unlikely to be in the order that the TQTab elements
    appear visually. One way of iterating over the tabs is like this:
    \code
    for ( uint i = 0; i < myTabBar->count(); ++i ) {
	nextTab = myTabBar->tabAt( i );
	// do something with nextTab
    }
    \endcode
*/
TQPtrList<TQTab> * TQTabBar::tabList()
{
    return l;
}


/*!
    \property TQTabBar::shape
    \brief the shape of the tabs in the tab bar

    The value of this property is one of the following: \c
    RoundedAbove (default), \c RoundedBelow, \c TriangularAbove or \c
    TriangularBelow.

    \sa Shape
*/
TQTabBar::Shape TQTabBar::shape() const
{
    return d ? d->s : RoundedAbove;
}

void TQTabBar::setShape( Shape s )
{
    if ( !d || d->s == s )
	return;
    //######### must recalculate heights
    d->s = s;
    update();
}

/*!
    Lays out all existing tabs according to their label and their
    iconset.
 */
void TQTabBar::layoutTabs()
{
    if ( lstatic->isEmpty() )
	return;

    TQSize oldSh(0, 0);
    if ( TQTab * t = l->first() ) {
	TQRect r( t->r );
	while ( (t = l->next()) != 0 )
	    r = r.unite( t->r );
	oldSh = r.size();
    }

    d->btnWidth = style().pixelMetric(TQStyle::PM_TabBarScrollButtonWidth, this);
    int hframe, vframe, overlap;
    hframe  = style().pixelMetric( TQStyle::PM_TabBarTabHSpace, this );
    vframe  = style().pixelMetric( TQStyle::PM_TabBarTabVSpace, this );
    overlap = style().pixelMetric( TQStyle::PM_TabBarTabOverlap, this );

    TQFontMetrics fm = fontMetrics();
    TQRect r;
    TQTab *t;
    bool reverse = TQApplication::reverseLayout();
    if ( reverse )
	t = lstatic->last();
    else
	t = lstatic->first();
    int x = 0;
    int offset = (t && d->scrolls) ? t->r.x() : 0;
    while ( t ) {
	int lw = fm.width( t->label );
	lw -= t->label.contains('&') * fm.width('&');
	lw += t->label.contains("&&") * fm.width('&');
	int iw = 0;
	int ih = 0;
	if ( t->iconset != 0 ) {
	    iw = t->iconset->pixmap( TQIconSet::Small, TQIconSet::Normal ).width() + 4;
	    ih = t->iconset->pixmap( TQIconSet::Small, TQIconSet::Normal ).height();
	}
	int h = TQMAX( fm.height(), ih );
	h = TQMAX( h, TQApplication::globalStrut().height() );

	h += vframe;
	t->r = TQRect(TQPoint(x, 0), style().sizeFromContents(TQStyle::CT_TabBarTab, this,
	             TQSize( TQMAX( lw + hframe + iw, TQApplication::globalStrut().width() ), h ),
		     TQStyleOption(t, hoverTab) ));
	x += t->r.width() - overlap;
	r = r.unite( t->r );
	if ( reverse )
	    t = lstatic->prev();
	else
	    t = lstatic->next();
    }
    x += overlap;
    int w = (d->scrolls) ? d->leftB->x() : width();
    if (x + offset < w)
	offset = w - x;
    if (offset > 0)
	offset = 0;

    for ( t = lstatic->first(); t; t = lstatic->next() ) {
	t->r.moveBy( offset, 0 );
	t->r.setHeight( r.height() );
    }

    if ( sizeHint() != oldSh )
	updateGeometry();

    emit layoutChanged();
}

/*!
    \reimp
*/

bool TQTabBar::event( TQEvent *e )
{
    if ( e->type() == TQEvent::LanguageChange ) {
	layoutTabs();
	updateArrowButtons();
	makeVisible( tab( currentTab() ));
    }

    return TQWidget::event( e );
}

/*!
  \reimp
*/

void TQTabBar::styleChange( TQStyle& old )
{
    layoutTabs();
    updateArrowButtons();
    TQWidget::styleChange( old );
}

/*!
    \reimp
*/
void TQTabBar::focusInEvent( TQFocusEvent * )
{
    TQTab *t = tab( d->focus );
    if ( t )
	repaint( t->r, FALSE );
}

/*!
    \reimp
*/
void TQTabBar::focusOutEvent( TQFocusEvent * )
{
    TQTab *t = tab( d->focus );
    if ( t )
	repaint( t->r, FALSE );
}

/*!
    \reimp
*/
void TQTabBar::resizeEvent( TQResizeEvent * )
{
    const int arrowWidth = TQMAX( d->btnWidth, TQApplication::globalStrut().width() );;
    d->rightB->setGeometry( width() - arrowWidth, 0, arrowWidth, height() );
    d->leftB->setGeometry( width() - 2*arrowWidth, 0, arrowWidth, height() );
    layoutTabs();
    updateArrowButtons();
    makeVisible( tab( currentTab() ));
}

void TQTabBar::scrollTabs()
{
    TQTab* left = 0;
    TQTab* right = 0;
    for ( TQTab* t = lstatic->first(); t; t = lstatic->next() ) {
	if ( t->r.left() < 0 && t->r.right() > 0 )
	    left = t;
	if ( t->r.left() < d->leftB->x()+2 )
	    right = t;
    }

    if ( sender() == d->leftB )
	makeVisible( left );
    else  if ( sender() == d->rightB )
	makeVisible( right );
}

void TQTabBar::makeVisible( TQTab* tab  )
{
    bool tooFarLeft = ( tab && tab->r.left() < 0 );
    bool tooFarRight = ( tab && tab->r.right() >= d->leftB->x() );

    if ( !d->scrolls || ( !tooFarLeft && ! tooFarRight ) )
	return;

    bool bs = signalsBlocked();
    blockSignals(TRUE);
    layoutTabs();
    blockSignals(bs);

    int offset = 0;

    if ( tooFarLeft ) {
	offset = tab->r.left();
	if (tab != lstatic->first())
	    offset -= 8;
    } else if ( tooFarRight ) {
	offset = tab->r.right() - d->leftB->x() + 1;
    }

    for ( TQTab* t = lstatic->first(); t; t = lstatic->next() )
	t->r.moveBy( -offset, 0 );

    d->leftB->setEnabled( lstatic->first()->r.left() < 0);
    d->rightB->setEnabled( lstatic->last()->r.right() >= d->leftB->x() );

    // Make sure disabled buttons pop up again
    if ( !d->leftB->isEnabled() && d->leftB->isDown() )
	d->leftB->setDown( FALSE );
    if ( !d->rightB->isEnabled() && d->rightB->isDown() )
	d->rightB->setDown( FALSE );

    update();
    emit layoutChanged();
}

void TQTabBar::updateArrowButtons()
{
    if (lstatic->isEmpty()) {
	d->scrolls = FALSE;
    } else {
	d->scrolls = (lstatic->last()->r.right() - lstatic->first()->r.left() > width());
    }
    if ( d->scrolls ) {
	const int arrowWidth = TQMAX( d->btnWidth, TQApplication::globalStrut().width() );
	if ( TQApplication::reverseLayout() ) {
	    d->rightB->setGeometry( arrowWidth, 0, arrowWidth, height() );
	    d->leftB->setGeometry( 0, 0, arrowWidth, height() );
	} else {
	    d->rightB->setGeometry( width() - arrowWidth, 0, arrowWidth, height() );
	    d->leftB->setGeometry( width() - 2*arrowWidth, 0, arrowWidth, height() );
	}

	d->leftB->setEnabled( lstatic->first()->r.left() < 0);
	d->rightB->setEnabled( lstatic->last()->r.right() >= d->leftB->x() );
	d->leftB->show();
	d->rightB->show();
    } else {
	d->leftB->hide();
	d->rightB->hide();
	layoutTabs();
    }
}

/*!
    Removes the tool tip for the tab at index position \a index.
*/
void TQTabBar::removeToolTip( int index )
{
#ifndef TQT_NO_TOOLTIP
    TQTab * tab = tabAt( index );
    if ( !tab || !d->toolTips )
	return;
    d->toolTips->remove( tab );
#endif
}

/*!
    Sets the tool tip for the tab at index position \a index to \a
    tip.
*/
void TQTabBar::setToolTip( int index, const TQString & tip )
{
#ifndef TQT_NO_TOOLTIP
    TQTab * tab = tabAt( index );
    if ( !tab )
	return;
    if ( d->toolTips == 0 )
	d->toolTips = new TQTabBarToolTip( this );
    d->toolTips->add( tab, tip );
#endif
}

/*!
    Returns the tool tip for the tab at index position \a index.
*/
TQString TQTabBar::toolTip( int index ) const
{
#ifndef TQT_NO_TOOLTIP
    if ( d->toolTips )
	return d->toolTips->tipForTab( tabAt( index ) );
    else
#endif
	return TQString();
}

/*!
    Sets the text of the tab to \a text.
*/
void TQTab::setText( const TQString& text )
{
    label = text;
    if ( tb ) {
#ifndef TQT_NO_ACCEL
	tb->d->a->removeItem( id );
	int p = TQAccel::shortcutKey( text );
	if ( p )
	    tb->d->a->insertItem( p, id );
#endif
	tb->layoutTabs();
	tb->repaint(FALSE);

#if defined(QT_ACCESSIBILITY_SUPPORT)
	TQAccessible::updateAccessibility( tb, tb->indexOf(id)+1, TQAccessible::NameChanged );
#endif
    }
}

/*!
    Sets the tab's iconset to \a icon
*/
void TQTab::setIconSet( const TQIconSet &icon )
{
    iconset = new TQIconSet( icon );
}

// this allows us to handle accelerators that are in a TQTabBar.
void TQTab::setTabBar( TQTabBar *newTb )
{
    tb = newTb;
}

/*!
    \internal
*/
void TQTabBar::fontChange( const TQFont & oldFont )
{
    layoutTabs();
    TQWidget::fontChange( oldFont );
}

/*!
    Returns the tab currently under the mouse pointer, or NULL if no tab is under the cursor
*/
TQTab *TQTabBar::mouseHoverTab() const
{
    return hoverTab;
}

#endif