summaryrefslogtreecommitdiffstats
path: root/src/dialogs/qtabdialog.cpp
blob: e770a4acc50c79d49e1a4825d5ba5f4a218a0631 (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
/****************************************************************************
**
** Implementation of QTabDialog class
**
** Created : 960825
**
** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the dialogs module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file.  Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/

#include "qtabdialog.h"

#ifndef QT_NO_TABDIALOG

#include "qobjectlist.h"
#include "qtabbar.h"
#include "qtabwidget.h"
#include "qpushbutton.h"
#include "qpainter.h"
#include "qpixmap.h"
#include "qapplication.h"
#include "qtabwidget.h"
#include "qwidgetstack.h"
#include "qlayout.h"

/*!
  \class QTabDialog qtabdialog.h

  \brief The QTabDialog class provides a stack of tabbed widgets.

  \ingroup dialogs
  \mainclass

  A tabbed dialog is one in which several "tab pages" are available.
  By clicking on a tab page's tab or by pressing the indicated
  Alt+\e{letter} key combination, the user can select which tab page
  they want to use.

  QTabDialog provides a tab bar consisting of single row of tabs at
  the top; each tab has an associated widget which is that tab's
  tab page. In addition, QTabDialog provides an OK button and the
  following optional buttons: Apply, Cancel, Defaults and Help.

  The normal way to use QTabDialog is to do the following in the
  constructor:
  \list 1
  \i Create a QTabDialog.
  \i Create a QWidget for each of the pages in the tab dialog, insert
  children into it, set up geometry management for it, and use
  addTab() (or insertTab()) to set up a tab and keyboard accelerator
  for it.
  \i Set up the buttons for the tab dialog using setOkButton(),
  setApplyButton(), setDefaultsButton(), setCancelButton() and
  setHelpButton().
  \i Connect to the signals and slots.
  \endlist

  If you don't call addTab() the page you have created will not be
  visible. Don't confuse the object name you supply to the
  QWidget constructor and the tab label you supply to addTab();
  addTab() takes user-visible name that appears on the widget's tab
  and may identify an accelerator, whereas the widget name is used
  primarily for debugging.

  Almost all applications have to connect the applyButtonPressed()
  signal to something. applyButtonPressed() is emitted when either OK
  or Apply is clicked, and your slot must copy the dialog's state into
  the application.

  There are also several other signals which may be useful:
  \list
  \i cancelButtonPressed() is emitted when the user clicks Cancel.
  \i defaultButtonPressed() is emitted when the user clicks Defaults;
  the slot it is connected to should reset the state of the dialog to
  the application defaults.
  \i helpButtonPressed() is emitted when the user clicks Help.
  \i aboutToShow() is emitted at the start of show(); if there is any
  chance that the state of the application may change between the
  creation of the tab dialog and the time show() is called, you must
  connect this signal to a slot that resets the state of the dialog.
  \i currentChanged() is emitted when the user selects a page.
  \endlist

  Each tab is either enabled or disabled at any given time (see
  setTabEnabled()). If a tab is enabled the tab text is drawn in
  black and the user can select that tab. If it is disabled the tab
  is drawn in a different way and the user cannot select that tab.
  Note that even if a tab is disabled, the page can still be visible;
  for example, if all of the tabs happen to be disabled.

  You can change a tab's label and iconset using changeTab(). A tab
  page can be removed with removePage() and shown with showPage(). The
  current page is given by currentPage().

  QTabDialog does not support tabs on the sides or bottom, nor can
  you set or retrieve the visible page. If you need more functionality
  than QTabDialog provides, consider creating a QDialog and using a
  QTabBar with QTabWidgets.

  Most of the functionality in QTabDialog is provided by a QTabWidget.

  <img src=qtabdlg-m.png> <img src=qtabdlg-w.png>

  \sa QDialog
*/

/*!
  \fn void QTabDialog::selected( const QString & );
  \obsolete

  This signal is emitted whenever a tab is selected (raised),
  including during the first show().

  \sa raise()
*/

/*! \fn void QTabDialog::currentChanged( QWidget* );

  This signal is emitted whenever the current page changes.

  \sa currentPage(), showPage(), tabLabel()
*/


// add comments about delete, ok and apply

class QTabDialogPrivate
{
public:
    QTabDialogPrivate();

    QTabWidget* tw;

    QPushButton * ok;
    QPushButton * cb;
    QPushButton * db;
    QPushButton * hb;
    QPushButton * ab;

    QBoxLayout * tll;
};

QTabDialogPrivate::QTabDialogPrivate()
	: tw(0),
	  ok(0), cb(0), db(0), hb(0), ab(0),
	  tll(0)
{ }

/*!
  Constructs a QTabDialog with only an OK button.
  The \a parent, \a name, \a modal and widget flag, \a f, arguments
  are passed on to the QDialog constructor.
*/

QTabDialog::QTabDialog( QWidget *parent, const char *name, bool modal,
			WFlags f )
    : QDialog( parent, name, modal, f )
{
    d = new QTabDialogPrivate;
    Q_CHECK_PTR( d );

    d->tw = new QTabWidget( this, "tab widget" );
    connect ( d->tw, SIGNAL ( selected(const QString&) ), this, SIGNAL( selected(const QString&) ) );
    connect ( d->tw, SIGNAL ( currentChanged(QWidget*) ), this, SIGNAL( currentChanged(QWidget*) ) );

    d->ok = new QPushButton( this, "ok" );
    Q_CHECK_PTR( d->ok );
    d->ok->setText( tr("OK") );
    d->ok->setDefault( TRUE );
    connect( d->ok, SIGNAL(clicked()),
	     this, SIGNAL(applyButtonPressed()) );
    connect( d->ok, SIGNAL(clicked()),
	     this, SLOT(accept()) );
}


/*!
  Destroys the tab dialog.
*/

QTabDialog::~QTabDialog()
{
    delete d;
}


/*!
  Sets the font for the tabs to \a font.

  If the widget is visible, the display is updated with the new font
  immediately. There may be some geometry changes, depending on the
  size of the old and new fonts.
*/

void QTabDialog::setFont( const QFont & font )
{
    QDialog::setFont( font );
    setSizes();
}


/*!
  \fn void QTabDialog::applyButtonPressed();

  This signal is emitted when either the Apply or OK button is clicked.

  It should be connected to a slot (or several slots) that change the
  application's state according to the state of the dialog.

  \sa cancelButtonPressed() defaultButtonPressed() setApplyButton()
*/


/*!
  Returns TRUE if the tab dialog has a Defaults button; otherwise
  returns FALSE.

  \sa setDefaultButton() defaultButtonPressed() hasApplyButton()
  hasCancelButton()
*/

bool QTabDialog::hasDefaultButton() const
{
     return d->db != 0;
}


/*!
  Returns TRUE if the tab dialog has a Help button; otherwise returns
  FALSE.

  \sa setHelpButton() helpButtonPressed() hasApplyButton()
  hasCancelButton()
*/

bool QTabDialog::hasHelpButton() const
{
     return d->hb != 0;
}


/*!
  \fn void QTabDialog::cancelButtonPressed();

  This signal is emitted when the Cancel button is clicked. It is
  automatically connected to QDialog::reject(), which will hide the
  dialog.

  The Cancel button should not change the application's state at all,
  so you should generally not need to connect it to any slot.

  \sa applyButtonPressed() defaultButtonPressed() setCancelButton()
*/


/*!
  Returns TRUE if the tab dialog has a Cancel button; otherwise
  returns FALSE.

  \sa setCancelButton() cancelButtonPressed() hasApplyButton()
  hasDefaultButton()
*/

bool QTabDialog::hasCancelButton() const
{
     return d->cb != 0;
}


/*!
  \fn void QTabDialog::defaultButtonPressed();

  This signal is emitted when the Defaults button is pressed. It
  should reset the dialog (but not the application) to the "factory
  defaults".

  The application's state should not be changed until the user clicks
  Apply or OK.

  \sa applyButtonPressed() cancelButtonPressed() setDefaultButton()
*/


/*!
  \fn void QTabDialog::helpButtonPressed();

  This signal is emitted when the Help button is pressed. It
  could be used to present information about how to use the dialog.

  \sa applyButtonPressed() cancelButtonPressed() setHelpButton()
*/


/*!
  Returns TRUE if the tab dialog has an Apply button; otherwise
  returns FALSE.

  \sa setApplyButton() applyButtonPressed() hasCancelButton()
  hasDefaultButton()
*/

bool QTabDialog::hasApplyButton() const
{
    return d->ab != 0;
}


/*!
  Returns TRUE if the tab dialog has an OK button; otherwise returns
  FALSE.

  \sa setOkButton() hasApplyButton() hasCancelButton()
  hasDefaultButton()
*/

bool QTabDialog::hasOkButton() const
{
    return d->ok != 0;
}


/*!
  \fn void QTabDialog::aboutToShow()

  This signal is emitted by show() when it is time to set the state of
  the dialog's contents. The dialog should reflect the current state
  of the application when it appears; if there is any possibility that
  the state of the application may change between the time you call
  QTabDialog::QTabDialog() and QTabDialog::show(), you should set the
  dialog's state in a slot and connect this signal to it.

  This applies mainly to QTabDialog objects that are kept around
  hidden, rather than being created, shown, and deleted afterwards.

  \sa applyButtonPressed(), show(), cancelButtonPressed()
*/


/*!\reimp
*/
void QTabDialog::show()
{
    //   Reimplemented in order to delay show()'ing of every page
    //   except the initially visible one, and in order to emit the
    //   aboutToShow() signal.
    if ( topLevelWidget() == this )
	d->tw->setFocus();
    emit aboutToShow();
    setSizes();
    setUpLayout();
    QDialog::show();
}


/*!
  Ensures that tab page \a i is visible and appropriately sized.
*/

void QTabDialog::showTab( int i )
{
    d->tw->showTab( i );
}


/*!
  Adds another tab and page to the tab view.

  The new page is \a child; the tab's label is \a label.
  Note the difference between the widget name (which you supply to
  widget constructors and to setTabEnabled(), for example) and the tab
  label. The name is internal to the program and invariant, whereas
  the label is shown on-screen and may vary according to language and
  other factors.

  If the tab's \a 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.

  If you call addTab() after show() the screen will flicker and the
  user may be confused.

  \sa insertTab()
*/

void QTabDialog::addTab( QWidget * child, const QString &label )
{
    d->tw->addTab( child, label );
}



/*! \overload

  This version of the function shows the \a iconset as well as the \a
  label on the tab of \a child.
*/
void QTabDialog::addTab( QWidget *child, const QIconSet& iconset, const QString &label)
{
    d->tw->addTab( child, iconset, label );
}

/*!
  \overload

  This is a lower-level method for adding tabs, similar to the other
  addTab() method. It is useful if you are using setTabBar() to set a
  QTabBar subclass with an overridden QTabBar::paint() function for a
  subclass of QTab.

  The \a child is the widget to be placed on the new tab page. The \a
  tab is the tab to display on the tab page -- normally this shows a
  label or an icon that identifies the tab page.

*/
void QTabDialog::addTab( QWidget * child, QTab* tab )
{
    d->tw->addTab( child, tab );
}

/*!
  Inserts another tab and page to the tab view.

  The new page is \a child; the tab's label is \a label.
  Note the difference between the widget name (which you supply to
  widget constructors and to setTabEnabled(), for example) and the tab
  label. The name is internal to the program and invariant, whereas
  the label is shown on-screen and may vary according to language and
  other factors.

  If the tab's \a 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.

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

  If you call insertTab() after show(), the screen will flicker and the
  user may be confused.

  \sa addTab()
*/

void QTabDialog::insertTab( QWidget * child, const QString &label, int index )
{
    d->tw->insertTab( child, label, index );
}


/*! \overload

  This version of the function shows the \a iconset as well as the \a
  label on the tab of \a child.
 */
void QTabDialog::insertTab( QWidget *child, const QIconSet& iconset, const QString &label, int index)
{
    d->tw->insertTab( child, iconset, label, index );
}

/*!
    \overload

  This is a lower-level method for inserting tabs, similar to the other
  insertTab() method. It is useful if you are using setTabBar() to set a
  QTabBar subclass with an overridden QTabBar::paint() function for a
  subclass of QTab.

  The \a child is the widget to be placed on the new tab page. The \a
  tab is the tab to display on the tab page -- normally this shows a
  label or an icon that identifies the tab page. The \a index is the
  position where this tab page should be inserted.

*/
void QTabDialog::insertTab( QWidget * child, QTab* tab, int index )
{
    d->tw->insertTab( child, tab, index );
}

/*!
  Replaces the QTabBar heading the dialog by the given tab bar, \a tb.
  Note that this must be called \e before any tabs have been added,
  or the behavior is undefined.
  \sa tabBar()
*/
void QTabDialog::setTabBar( QTabBar* tb )
{
    d->tw->setTabBar( tb );
    setUpLayout();
}

/*!
  Returns the currently set QTabBar.
  \sa setTabBar()
*/
QTabBar* QTabDialog::tabBar() const
{
    return d->tw->tabBar();
}

/*!  Ensures that widget \a w is shown. This is mainly useful for accelerators.

  \warning If used carelessly, this function can easily surprise or
  confuse the user.

  \sa QTabBar::setCurrentTab()
*/

void QTabDialog::showPage( QWidget * w )
{
    d->tw->showPage( w );
}


/*! \obsolete
  Returns TRUE if the page with object name \a name is enabled and
  FALSE if it is disabled.

  If \a name is 0 or not the name of any of the pages, isTabEnabled()
  returns FALSE.

  \sa setTabEnabled(), QWidget::isEnabled()
*/

bool QTabDialog::isTabEnabled( const char* name ) const
{
    if ( !name )
	return FALSE;
    QObjectList * l
	= ((QTabDialog *)this)->queryList( "QWidget", name, FALSE, TRUE );
    if ( l && l->first() ) {
	QWidget * w;
	while( l->current() ) {
	    while( l->current() && !l->current()->isWidgetType() )
		l->next();
	    w = (QWidget *)(l->current());
	    if ( w ) {
		bool enabled = d->tw->isTabEnabled( w );
		delete l;
		return enabled;
	    }
	}
    }
    delete l;
    return FALSE;
}


/*!\obsolete

  Finds the page with object name \a name, enables/disables it
  according to the value of \a enable and redraws the page's tab
  appropriately.

  QTabDialog uses QWidget::setEnabled() internally, rather than keeping a
  separate flag.

  Note that even a disabled tab/page may be visible. If the page is
  already visible QTabDialog will not hide it; if all the pages
  are disabled QTabDialog will show one of them.

  The object name is used (rather than the tab label) because the tab
  text may not be invariant in multi-language applications.

  \sa isTabEnabled(), QWidget::setEnabled()
*/

void QTabDialog::setTabEnabled( const char* name, bool enable )
{
    if ( !name )
	return;
    QObjectList * l
	= ((QTabDialog *)this)->queryList( "QWidget", name, FALSE, TRUE );
    if ( l && l->first() ) {
	QObjectListIt it(*l);
	QObject *o;
	while( (o = it.current()) ) {
	    ++it;
	    if( o->isWidgetType() )
		d->tw->setTabEnabled( (QWidget*)o, enable );
	}
    }
    delete l;
}


/* ### SHOULD THIS BE HERE?
  Adds an Apply button to the dialog. The button's text is set to \e
  text (and defaults to "Apply").

  The Apply button should apply the current settings in the dialog box
  to the application, while keeping the dialog visible.

  When Apply is clicked, the applyButtonPressed() signal is emitted.

  If \a text is a
  \link QString::operator!() null string\endlink,
  no button is shown.

  \sa setCancelButton() setDefaultButton() applyButtonPressed()
*/


/*!
  Returns TRUE if the page \a w is enabled; otherwise returns FALSE.

  \sa setTabEnabled(), QWidget::isEnabled()
*/

bool QTabDialog::isTabEnabled( QWidget* w ) const
{
    return d->tw->isTabEnabled( w );
}

/*!
  If \a enable is TRUE the page \a w is enabled; otherwise \a w is
  disabled. The page's tab is redrawn appropriately.

  QTabWidget uses QWidget::setEnabled() internally, rather than keeping a
  separate flag.

  Note that even a disabled tab and tab page may be visible. If the
  page is already visible QTabWidget will not hide it; if all the
  pages are disabled QTabWidget will show one of them.

  \sa isTabEnabled(), QWidget::setEnabled()
*/

void QTabDialog::setTabEnabled( QWidget* w, bool enable)
{
    d->tw->setTabEnabled( w, enable );
}


/*!
  Adds an Apply button to the dialog. The button's text is set to \a
  text.

  The Apply button should apply the current settings in the dialog box
  to the application while keeping the dialog visible.

  When Apply is clicked, the applyButtonPressed() signal is emitted.

  If \a text is a
  \link QString::operator!() null string\endlink,
  no button is shown.

  \sa setCancelButton() setDefaultButton() applyButtonPressed()
*/
void QTabDialog::setApplyButton( const QString &text )
{
    if ( !text && d->ab ) {
	delete d->ab;
	d->ab = 0;
	setSizes();
    } else {
	if ( !d->ab ) {
	    d->ab = new QPushButton( this, "apply settings" );
	    connect( d->ab, SIGNAL(clicked()),
		     this, SIGNAL(applyButtonPressed()) );
	    setUpLayout();
	}
	d->ab->setText( text );
	setSizes();
	//d->ab->show();
    }
}

/*!
    \overload

  Adds an Apply button to the dialog. The button's text is set to
  a localizable "Apply".
 */
void QTabDialog::setApplyButton()
{
    setApplyButton( tr("Apply") );
}


/*!
  Adds a Help button to the dialog. The button's text is set to \a
  text.

  When Help is clicked, the helpButtonPressed() signal is emitted.

  If \a text is a
  \link QString::operator!() null string\endlink,
  no button is shown.

  \sa setApplyButton() setCancelButton() helpButtonPressed()
*/

void QTabDialog::setHelpButton( const QString &text )
{
    if ( !text ) {
	delete d->hb;
	d->hb = 0;
	setSizes();
    } else {
	if ( !d->hb ) {
	    d->hb = new QPushButton( this, "give help" );
	    connect( d->hb, SIGNAL(clicked()),
		     this, SIGNAL(helpButtonPressed()) );
	    setUpLayout();
	}
	d->hb->setText( text );
	setSizes();
	//d->hb->show();
    }
}


/*!
    \overload

  Adds a Help button to the dialog. The button's text is set to
  a localizable "Help".
 */
void QTabDialog::setHelpButton()
{
    setHelpButton( tr("Help") );
}

/*!
  Adds a Defaults button to the dialog. The button's text is set to \a
  text.

  The Defaults button should set the dialog (but not the application)
  back to the application defaults.

  When Defaults is clicked, the defaultButtonPressed() signal is emitted.

  If \a text is a
  \link QString::operator!() null string\endlink,
  no button is shown.

  \sa setApplyButton() setCancelButton() defaultButtonPressed()
*/

void QTabDialog::setDefaultButton( const QString &text )
{
    if ( !text ) {
	delete d->db;
	d->db = 0;
	setSizes();
    } else {
	if ( !d->db ) {
	    d->db = new QPushButton( this, "back to default" );
	    connect( d->db, SIGNAL(clicked()),
		     this, SIGNAL(defaultButtonPressed()) );
	    setUpLayout();
	}
	d->db->setText( text );
	setSizes();
	//d->db->show();
    }
}


/*!
    \overload

  Adds a Defaults button to the dialog. The button's text is set to
  a localizable "Defaults".
 */
void QTabDialog::setDefaultButton()
{
    setDefaultButton( tr("Defaults") );
}

/*!
  Adds a Cancel button to the dialog. The button's text is set to \a
  text.

  The cancel button should always return the application to the state
  it was in before the tab view popped up, or if the user has clicked
  Apply, back to the state immediately after the last Apply.

  When Cancel is clicked, the cancelButtonPressed() signal is emitted.
  The dialog is closed at the same time.

  If \a text is a
  \link QString::operator!() null string\endlink,
  no button is shown.

  \sa setApplyButton() setDefaultButton() cancelButtonPressed()
*/

void QTabDialog::setCancelButton( const QString &text )
{
    if ( !text ) {
	delete d->cb;
	d->cb = 0;
	setSizes();
    } else {
	if ( !d->cb ) {
	    d->cb = new QPushButton( this, "cancel dialog" );
	    connect( d->cb, SIGNAL(clicked()),
		     this, SIGNAL(cancelButtonPressed()) );
	    connect( d->cb, SIGNAL(clicked()),
		     this, SLOT(reject()) );
	    setUpLayout();
	}
	d->cb->setText( text );
	setSizes();
	//d->cb->show();
    }
}


/*!
    \overload

  Adds a Cancel button to the dialog. The button's text is set to
  a localizable "Cancel".
 */

void QTabDialog::setCancelButton()
{
    setCancelButton( tr("Cancel") );
}


/*!  Sets up the layout manager for the tab dialog.

  \sa setSizes() setApplyButton() setCancelButton() setDefaultButton()
*/

void QTabDialog::setUpLayout()
{
    // the next four are probably the same, really?
    const int topMargin = 6;
    const int leftMargin = 6;
    const int rightMargin = 6;
    const int bottomMargin = 6;
    const int betweenButtonsMargin = 7;
    const int aboveButtonsMargin = 8;

    delete d->tll;
    d->tll = new QBoxLayout( this, QBoxLayout::Down );

    // top margin
    d->tll->addSpacing( topMargin );

    QBoxLayout * tmp = new QHBoxLayout();
    d->tll->addLayout( tmp, 1 );
    tmp->addSpacing( leftMargin );
    tmp->addWidget( d->tw, 1);
    tmp->addSpacing( rightMargin + 2 );

    d->tll->addSpacing( aboveButtonsMargin + 2 );
    QBoxLayout * buttonRow = new QBoxLayout(QBoxLayout::RightToLeft);
    d->tll->addLayout( buttonRow, 0 );
    d->tll->addSpacing( bottomMargin );

    buttonRow->addSpacing( rightMargin );
    if ( d->cb ) {
	buttonRow->addWidget( d->cb, 0 );
	buttonRow->addSpacing( betweenButtonsMargin );
	d->cb->raise();
    }

    if ( d->ab ) {
	buttonRow->addWidget( d->ab, 0 );
	buttonRow->addSpacing( betweenButtonsMargin );
	d->ab->raise();
    }

    if ( d->db ) {
	buttonRow->addWidget( d->db, 0 );
	buttonRow->addSpacing( betweenButtonsMargin );
	d->db->raise();
    }

    if ( d->hb ) {
	buttonRow->addWidget( d->hb, 0 );
	buttonRow->addSpacing( betweenButtonsMargin );
	d->hb->raise();
    }

    if ( d->ok ) {
	buttonRow->addWidget( d->ok, 0 );
	buttonRow->addSpacing( betweenButtonsMargin );
	d->ok->raise();
    }

    // add one custom widget here
    buttonRow->addStretch( 1 );
    // add another custom widget here

    d->tll->activate();
}


/*!  Sets up the minimum and maximum sizes for each child widget.

  \sa setUpLayout() setFont()
*/

void QTabDialog::setSizes()
{
    // compute largest button size
    QSize s( 0, 0 );
    int bw = s.width();
    int bh = s.height();

    if ( d->ok ) {
	s = d->ok->sizeHint();
	if ( s.width() > bw )
	    bw = s.width();
	if ( s.height() > bh )
	    bh = s.height();
    }

    if ( d->ab ) {
	s = d->ab->sizeHint();
	if ( s.width() > bw )
	    bw = s.width();
	if ( s.height() > bh )
	    bh = s.height();
    }

    if ( d->db ) {
	s = d->db->sizeHint();
	if ( s.width() > bw )
	    bw = s.width();
	if ( s.height() > bh )
	    bh = s.height();
    }

    if ( d->hb ) {
	s = d->hb->sizeHint();
	if ( s.width() > bw )
	    bw = s.width();
	if ( s.height() > bh )
	    bh = s.height();
    }

    if ( d->cb ) {
	s = d->cb->sizeHint();
	if ( s.width() > bw )
	    bw = s.width();
	if ( s.height() > bh )
	    bh = s.height();
    }

    // and set all the buttons to that size
    if ( d->ok )
	d->ok->setFixedSize( bw, bh );
    if ( d->ab )
	d->ab->setFixedSize( bw, bh );
    if ( d->db )
	d->db->setFixedSize( bw, bh );
    if ( d->hb )
	d->hb->setFixedSize( bw, bh );
    if ( d->cb )
	d->cb->setFixedSize( bw, bh );

    // fiddle the tab chain so the buttons are in their natural order
    QWidget * w = d->ok;

    if ( d->hb ) {
	if ( w )
	    setTabOrder( w, d->hb );
	w = d->hb;
    }
    if ( d->db ) {
	if ( w )
	    setTabOrder( w, d->db );
	w = d->db;
    }
    if ( d->ab ) {
	if ( w )
	    setTabOrder( w, d->ab );
	w = d->ab;
    }
    if ( d->cb ) {
	if ( w )
	    setTabOrder( w, d->cb );
	w = d->cb;
    }
    setTabOrder( w, d->tw );
}

/*!\reimp
*/
void QTabDialog::resizeEvent( QResizeEvent * e )
{
    QDialog::resizeEvent( e );
}


/*!\reimp
*/
void QTabDialog::paintEvent( QPaintEvent * )
{
}


/*!
  Adds an OK button to the dialog and sets the button's text to \a text.

  When the OK button is clicked, the applyButtonPressed() signal is emitted,
  and the current settings in the dialog box should be applied to
  the application. The dialog then closes.

  If \a text is a
  \link QString::operator!() null string\endlink,
  no button is shown.

  \sa setCancelButton() setDefaultButton() applyButtonPressed()
*/

void QTabDialog::setOkButton( const QString &text )
{
    if ( !text ) {
	delete d->ok;
	d->ok = 0;
	setSizes();
    } else {
	if ( !d->ok ) {
	    d->ok = new QPushButton( this, "ok" );
	    connect( d->ok, SIGNAL(clicked()),
		     this, SIGNAL(applyButtonPressed()) );
	    setUpLayout();
	}
	d->ok->setText( text );
	setSizes();
	//d->ok->show();
    }
}
/*!
  \overload

  Adds an OK button to the dialog. The button's text is set to
  a localizable "OK".
 */

void QTabDialog::setOkButton()
{
    setOkButton( tr("OK") );
}


/*
    \overload
  Old version of setOkButton(), provided for backward compatibility.
*/
void QTabDialog::setOKButton( const QString &text )
{
    // Ugly workaround for original "OK" default argument
    QString newText( text );
    if ( text.isNull() )
	newText = QString::fromLatin1( "OK" );
    setOkButton( newText );
}


/*!  Returns the text in the tab for page \a w.
*/

QString QTabDialog::tabLabel( QWidget * w )
{
    return d->tw->tabLabel( w );
}


/*!  \reimp
*/
void QTabDialog::styleChange( QStyle& s )
{
    QDialog::styleChange( s );
    setSizes();
}


/*!  Returns a pointer to the page currently being displayed by the
tab dialog. The tab dialog does its best to make sure that this value
is never 0 (but if you try hard enough, it can be).
*/

QWidget * QTabDialog::currentPage() const
{
    return d->tw->currentPage();
}

/*!
 \overload
  Defines a new \a label for the tab of page \a w
 */
void QTabDialog::changeTab( QWidget *w, const QString &label)
{
    d->tw->changeTab( w, label );
}

/*!
    Changes tab page \a w's iconset to \a iconset and label to \a label.

 */
void QTabDialog::changeTab( QWidget *w, const QIconSet& iconset, const QString &label)
{
    d->tw->changeTab( w, iconset, label );
}

/*! Removes page \a w from this stack of widgets. Does not
  delete \a w.
  \sa showPage(), QTabWidget::removePage(), QWidgetStack::removeWidget()
*/
void QTabDialog::removePage( QWidget * w )
{
    d->tw->removePage( w );
}

#endif