summaryrefslogtreecommitdiffstats
path: root/src/widgets/dialogs/qdialog.cpp
blob: 906022a18577f26d8b151969f9f15fd4268b950c (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
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWidgets 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtWidgets/qtwidgetsglobal.h>
#if QT_CONFIG(colordialog)
#include "qcolordialog.h"
#endif
#if QT_CONFIG(fontdialog)
#include "qfontdialog.h"
#endif
#if QT_CONFIG(filedialog)
#include "qfiledialog.h"
#endif

#include "qevent.h"
#include "qdesktopwidget.h"
#include <private/qdesktopwidget_p.h>
#include "qapplication.h"
#include "qlayout.h"
#if QT_CONFIG(sizegrip)
#include "qsizegrip.h"
#endif
#if QT_CONFIG(whatsthis)
#include "qwhatsthis.h"
#endif
#if QT_CONFIG(menu)
#include "qmenu.h"
#endif
#include "qcursor.h"
#if QT_CONFIG(messagebox)
#include "qmessagebox.h"
#endif
#if QT_CONFIG(errormessage)
#include "qerrormessage.h"
#endif
#include <qpa/qplatformtheme.h>
#include "private/qdialog_p.h"
#include "private/qguiapplication_p.h"
#ifndef QT_NO_ACCESSIBILITY
#include "qaccessible.h"
#endif

QT_BEGIN_NAMESPACE

static inline int themeDialogType(const QDialog *dialog)
{
#if QT_CONFIG(filedialog)
    if (qobject_cast<const QFileDialog *>(dialog))
        return QPlatformTheme::FileDialog;
#endif
#if QT_CONFIG(colordialog)
    if (qobject_cast<const QColorDialog *>(dialog))
        return QPlatformTheme::ColorDialog;
#endif
#if QT_CONFIG(fontdialog)
    if (qobject_cast<const QFontDialog *>(dialog))
        return QPlatformTheme::FontDialog;
#endif
#if QT_CONFIG(messagebox)
    if (qobject_cast<const QMessageBox *>(dialog))
        return QPlatformTheme::MessageDialog;
#endif
#if QT_CONFIG(errormessage)
    if (qobject_cast<const QErrorMessage *>(dialog))
        return QPlatformTheme::MessageDialog;
#endif
#if !QT_CONFIG(filedialog) && !QT_CONFIG(colordialog) && !QT_CONFIG(fontdialog) && \
    !QT_CONFIG(messagebox) && !QT_CONFIG(errormessage)
    Q_UNUSED(dialog);
#endif
    return -1;
}

QDialogPrivate::~QDialogPrivate()
{
    delete m_platformHelper;
}

QPlatformDialogHelper *QDialogPrivate::platformHelper() const
{
    // Delayed creation of the platform, ensuring that
    // that qobject_cast<> on the dialog works in the plugin.
    if (!m_platformHelperCreated && canBeNativeDialog()) {
        m_platformHelperCreated = true;
        QDialogPrivate *ncThis = const_cast<QDialogPrivate *>(this);
        QDialog *dialog = ncThis->q_func();
        const int type = themeDialogType(dialog);
        if (type >= 0) {
            m_platformHelper = QGuiApplicationPrivate::platformTheme()
                    ->createPlatformDialogHelper(static_cast<QPlatformTheme::DialogType>(type));
            if (m_platformHelper) {
                QObject::connect(m_platformHelper, SIGNAL(accept()), dialog, SLOT(accept()));
                QObject::connect(m_platformHelper, SIGNAL(reject()), dialog, SLOT(reject()));
                ncThis->initHelper(m_platformHelper);
            }
        }
    }
    return m_platformHelper;
}

bool QDialogPrivate::canBeNativeDialog() const
{
    QDialogPrivate *ncThis = const_cast<QDialogPrivate *>(this);
    QDialog *dialog = ncThis->q_func();
    const int type = themeDialogType(dialog);
    if (type >= 0)
        return QGuiApplicationPrivate::platformTheme()
                ->usePlatformNativeDialog(static_cast<QPlatformTheme::DialogType>(type));
    return false;
}

/*!
    \internal

    Properly hides dialog and sets the \a resultCode.
 */
void QDialogPrivate::hide(int resultCode)
{
    Q_Q(QDialog);

    q->setResult(resultCode);
    q->hide();

    close_helper(QWidgetPrivate::CloseNoEvent);
    resetModalitySetByOpen();
}

/*!
    \internal

    Emits finished() signal with \a resultCode. If the \a dialogCode
    is equal to 0 emits rejected(), if the \a dialogCode is equal to
    1 emits accepted().
 */
void QDialogPrivate::finalize(int resultCode, int dialogCode)
{
    Q_Q(QDialog);

    if (dialogCode == QDialog::Accepted)
        emit q->accepted();
    else if (dialogCode == QDialog::Rejected)
        emit q->rejected();

    emit q->finished(resultCode);
}

QWindow *QDialogPrivate::transientParentWindow() const
{
    Q_Q(const QDialog);
    if (const QWidget *parent = q->nativeParentWidget())
        return parent->windowHandle();
    else if (q->windowHandle())
        return q->windowHandle()->transientParent();
    return nullptr;
}

bool QDialogPrivate::setNativeDialogVisible(bool visible)
{
    if (QPlatformDialogHelper *helper = platformHelper()) {
        if (visible) {
            Q_Q(QDialog);
            helperPrepareShow(helper);
            nativeDialogInUse = helper->show(q->windowFlags(), q->windowModality(), transientParentWindow());
        } else if (nativeDialogInUse) {
            helper->hide();
        }
    }
    return nativeDialogInUse;
}

QVariant QDialogPrivate::styleHint(QPlatformDialogHelper::StyleHint hint) const
{
    if (const QPlatformDialogHelper *helper = platformHelper())
        return helper->styleHint(hint);
    return QPlatformDialogHelper::defaultStyleHint(hint);
}

void QDialogPrivate::deletePlatformHelper()
{
    delete m_platformHelper;
    m_platformHelper = nullptr;
    m_platformHelperCreated = false;
    nativeDialogInUse = false;
}

/*!
    \class QDialog
    \brief The QDialog class is the base class of dialog windows.

    \ingroup dialog-classes
    \ingroup abstractwidgets
    \inmodule QtWidgets

    A dialog window is a top-level window mostly used for short-term
    tasks and brief communications with the user. QDialogs may be
    modal or modeless. QDialogs can
    provide a \l{#return}{return value}, and they can have \l{#default}{default buttons}. QDialogs can also have a QSizeGrip in their
    lower-right corner, using setSizeGripEnabled().

    Note that QDialog (and any other widget that has type \c Qt::Dialog) uses
    the parent widget slightly differently from other classes in Qt. A dialog is
    always a top-level widget, but if it has a parent, its default location is
    centered on top of the parent's top-level widget (if it is not top-level
    itself). It will also share the parent's taskbar entry.

    Use the overload of the QWidget::setParent() function to change
    the ownership of a QDialog widget. This function allows you to
    explicitly set the window flags of the reparented widget; using
    the overloaded function will clear the window flags specifying the
    window-system properties for the widget (in particular it will
    reset the Qt::Dialog flag).

    \note The parent relationship of the dialog does \e{not} imply
    that the dialog will always be stacked on top of the parent
    window. To ensure that the dialog is always on top, make the
    dialog modal. This also applies for child windows of the dialog
    itself. To ensure that child windows of the dialog stay on top
    of the dialog, make the child windows modal as well.

    \section1 Modal Dialogs

    A \b{modal} dialog is a dialog that blocks input to other
    visible windows in the same application. Dialogs that are used to
    request a file name from the user or that are used to set
    application preferences are usually modal. Dialogs can be
    \l{Qt::ApplicationModal}{application modal} (the default) or
    \l{Qt::WindowModal}{window modal}.

    When an application modal dialog is opened, the user must finish
    interacting with the dialog and close it before they can access
    any other window in the application. Window modal dialogs only
    block access to the window associated with the dialog, allowing
    the user to continue to use other windows in an application.

    The most common way to display a modal dialog is to call its
    exec() function. When the user closes the dialog, exec() will
    provide a useful \l{#return}{return value}. To close the dialog
    and return the appropriate value, you must connect a default button,
    e.g. an \uicontrol OK button to the accept() slot and a
    \uicontrol Cancel button to the reject() slot. Alternatively, you
    can call the done() slot with \c Accepted or \c Rejected.

    An alternative is to call setModal(true) or setWindowModality(),
    then show(). Unlike exec(), show() returns control to the caller
    immediately. Calling setModal(true) is especially useful for
    progress dialogs, where the user must have the ability to interact
    with the dialog, e.g.  to cancel a long running operation. If you
    use show() and setModal(true) together to perform a long operation,
    you must call QCoreApplication::processEvents() periodically during
    processing to enable the user to interact with the dialog. (See
    QProgressDialog.)

    \section1 Modeless Dialogs

    A \b{modeless} dialog is a dialog that operates
    independently of other windows in the same application. Find and
    replace dialogs in word-processors are often modeless to allow the
    user to interact with both the application's main window and with
    the dialog.

    Modeless dialogs are displayed using show(), which returns control
    to the caller immediately.

    If you invoke the \l{QWidget::show()}{show()} function after hiding
    a dialog, the dialog will be displayed in its original position. This is
    because the window manager decides the position for windows that
    have not been explicitly placed by the programmer. To preserve the
    position of a dialog that has been moved by the user, save its position
    in your \l{QWidget::closeEvent()}{closeEvent()}  handler and then
    move the dialog to that position, before showing it again.

    \target default
    \section1 Default Button

    A dialog's \e default button is the button that's pressed when the
    user presses Enter (Return). This button is used to signify that
    the user accepts the dialog's settings and wants to close the
    dialog. Use QPushButton::setDefault(), QPushButton::isDefault()
    and QPushButton::autoDefault() to set and control the dialog's
    default button.

    \target escapekey
    \section1 Escape Key

    If the user presses the Esc key in a dialog, QDialog::reject()
    will be called. This will cause the window to close: The \l{QCloseEvent}{close event} cannot be \l{QEvent::ignore()}{ignored}.

    \section1 Extensibility

    Extensibility is the ability to show the dialog in two ways: a
    partial dialog that shows the most commonly used options, and a
    full dialog that shows all the options. Typically an extensible
    dialog will initially appear as a partial dialog, but with a
    \uicontrol More toggle button. If the user presses the \uicontrol More button down,
    the dialog is expanded. The \l{Extension Example} shows how to achieve
    extensible dialogs using Qt.

    \target return
    \section1 Return Value (Modal Dialogs)

    Modal dialogs are often used in situations where a return value is
    required, e.g. to indicate whether the user pressed \uicontrol OK or
    \uicontrol Cancel. A dialog can be closed by calling the accept() or the
    reject() slots, and exec() will return \c Accepted or \c Rejected
    as appropriate. The exec() call returns the result of the dialog.
    The result is also available from result() if the dialog has not
    been destroyed.

    In order to modify your dialog's close behavior, you can reimplement
    the functions accept(), reject() or done(). The
    \l{QWidget::closeEvent()}{closeEvent()} function should only be
    reimplemented to preserve the dialog's position or to override the
    standard close or reject behavior.

    \target examples
    \section1 Code Examples

    A modal dialog:

    \snippet dialogs/dialogs.cpp 1

    A modeless dialog:

    \snippet dialogs/dialogs.cpp 0

    \sa QDialogButtonBox, QTabWidget, QWidget, QProgressDialog,
        {fowler}{GUI Design Handbook: Dialogs, Standard}, {Extension Example},
        {Standard Dialogs Example}
*/

/*! \enum QDialog::DialogCode

    The value returned by a modal dialog.

    \value Accepted
    \value Rejected
*/

/*!
  \property QDialog::sizeGripEnabled
  \brief whether the size grip is enabled

  A QSizeGrip is placed in the bottom-right corner of the dialog when this
  property is enabled. By default, the size grip is disabled.
*/


/*!
  Constructs a dialog with parent \a parent.

  A dialog is always a top-level widget, but if it has a parent, its
  default location is centered on top of the parent. It will also
  share the parent's taskbar entry.

  The widget flags \a f are passed on to the QWidget constructor.
  If, for example, you don't want a What's This button in the title bar
  of the dialog, pass Qt::WindowTitleHint | Qt::WindowSystemMenuHint in \a f.

  \sa QWidget::setWindowFlags()
*/

QDialog::QDialog(QWidget *parent, Qt::WindowFlags f)
    : QWidget(*new QDialogPrivate, parent,
              f | ((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : Qt::WindowType(0)))
{
}

/*!
  \overload
  \internal
*/
QDialog::QDialog(QDialogPrivate &dd, QWidget *parent, Qt::WindowFlags f)
    : QWidget(dd, parent, f | ((f & Qt::WindowType_Mask) == 0 ? Qt::Dialog : Qt::WindowType(0)))
{
}

/*!
  Destroys the QDialog, deleting all its children.
*/

QDialog::~QDialog()
{
    QT_TRY {
        // Need to hide() here, as our (to-be) overridden hide()
        // will not be called in ~QWidget.
        hide();
    } QT_CATCH(...) {
        // we're in the destructor - just swallow the exception
    }
}

/*!
  \internal
  This function is called by the push button \a pushButton when it
  becomes the default button. If \a pushButton is \nullptr, the dialogs
  default default button becomes the default button. This is what a
  push button calls when it loses focus.
*/
#if QT_CONFIG(pushbutton)
void QDialogPrivate::setDefault(QPushButton *pushButton)
{
    Q_Q(QDialog);
    bool hasMain = false;
    QList<QPushButton*> list = q->findChildren<QPushButton*>();
    for (int i=0; i<list.size(); ++i) {
        QPushButton *pb = list.at(i);
        if (pb->window() == q) {
            if (pb == mainDef)
                hasMain = true;
            if (pb != pushButton)
                pb->setDefault(false);
        }
    }
    if (!pushButton && hasMain)
        mainDef->setDefault(true);
    if (!hasMain)
        mainDef = pushButton;
}

/*!
  \internal
  This function sets the default default push button to \a pushButton.
  This function is called by QPushButton::setDefault().
*/
void QDialogPrivate::setMainDefault(QPushButton *pushButton)
{
    mainDef = nullptr;
    setDefault(pushButton);
}

/*!
  \internal
  Hides the default button indicator. Called when non auto-default
  push button get focus.
 */
void QDialogPrivate::hideDefault()
{
    Q_Q(QDialog);
    QList<QPushButton*> list = q->findChildren<QPushButton*>();
    for (int i=0; i<list.size(); ++i) {
        list.at(i)->setDefault(false);
    }
}
#endif

void QDialogPrivate::resetModalitySetByOpen()
{
    Q_Q(QDialog);
    if (resetModalityTo != -1 && !q->testAttribute(Qt::WA_SetWindowModality)) {
        // open() changed the window modality and the user didn't touch it afterwards; restore it
        q->setWindowModality(Qt::WindowModality(resetModalityTo));
        q->setAttribute(Qt::WA_SetWindowModality, wasModalitySet);
#ifdef Q_OS_MAC
        Q_ASSERT(resetModalityTo != Qt::WindowModal);
        q->setParent(q->parentWidget(), Qt::Dialog);
#endif
    }
    resetModalityTo = -1;
}

/*!
  In general returns the modal dialog's result code, \c Accepted or
  \c Rejected.

  \note When called on a QMessageBox instance, the returned value is a
  value of the \l QMessageBox::StandardButton enum.

  Do not call this function if the dialog was constructed with the
  Qt::WA_DeleteOnClose attribute.
*/
int QDialog::result() const
{
    Q_D(const QDialog);
    return d->rescode;
}

/*!
  \fn void QDialog::setResult(int i)

  Sets the modal dialog's result code to \a i.

  \note We recommend that you use one of the values defined by
  QDialog::DialogCode.
*/
void QDialog::setResult(int r)
{
    Q_D(QDialog);
    d->rescode = r;
}

/*!
    \since 4.5

    Shows the dialog as a \l{QDialog#Modal Dialogs}{window modal dialog},
    returning immediately.

    \sa exec(), show(), result(), setWindowModality()
*/
void QDialog::open()
{
    Q_D(QDialog);

    Qt::WindowModality modality = windowModality();
    if (modality != Qt::WindowModal) {
        d->resetModalityTo = modality;
        d->wasModalitySet = testAttribute(Qt::WA_SetWindowModality);
        setWindowModality(Qt::WindowModal);
        setAttribute(Qt::WA_SetWindowModality, false);
#ifdef Q_OS_MAC
        setParent(parentWidget(), Qt::Sheet);
#endif
    }

    setResult(0);
    show();
}

/*!
    Shows the dialog as a \l{QDialog#Modal Dialogs}{modal dialog},
    blocking until the user closes it. The function returns a \l
    DialogCode result.

    If the dialog is \l{Qt::ApplicationModal}{application modal}, users cannot
    interact with any other window in the same application until they close
    the dialog. If the dialog is \l{Qt::ApplicationModal}{window modal}, only
    interaction with the parent window is blocked while the dialog is open.
    By default, the dialog is application modal.

    \note Avoid using this function; instead, use \c{open()}. Unlike exec(),
    open() is asynchronous, and does not spin an additional event loop. This
    prevents a series of dangerous bugs from happening (e.g. deleting the
    dialog's parent while the dialog is open via exec()). When using open() you
    can connect to the finished() signal of QDialog to be notified when the
    dialog is closed.

    \sa open(), show(), result(), setWindowModality()
*/

int QDialog::exec()
{
    Q_D(QDialog);

    if (Q_UNLIKELY(d->eventLoop)) {
        qWarning("QDialog::exec: Recursive call detected");
        return -1;
    }

    bool deleteOnClose = testAttribute(Qt::WA_DeleteOnClose);
    setAttribute(Qt::WA_DeleteOnClose, false);

    d->resetModalitySetByOpen();

    bool wasShowModal = testAttribute(Qt::WA_ShowModal);
    setAttribute(Qt::WA_ShowModal, true);
    setResult(0);

    show();

    QPointer<QDialog> guard = this;
    if (d->nativeDialogInUse) {
        d->platformHelper()->exec();
    } else {
        QEventLoop eventLoop;
        d->eventLoop = &eventLoop;
        (void) eventLoop.exec(QEventLoop::DialogExec);
    }
    if (guard.isNull())
        return QDialog::Rejected;
    d->eventLoop = nullptr;

    setAttribute(Qt::WA_ShowModal, wasShowModal);

    int res = result();
    if (d->nativeDialogInUse)
        d->helperDone(static_cast<QDialog::DialogCode>(res), d->platformHelper());
    if (deleteOnClose)
        delete this;
    return res;
}

/*!
  Closes the dialog and sets its result code to \a r. The finished() signal
  will emit \a r; if \a r is QDialog::Accepted or QDialog::Rejected, the
  accepted() or the rejected() signals will also be emitted, respectively.

  If this dialog is shown with exec(), done() also causes the local event loop
  to finish, and exec() to return \a r.

  As with QWidget::close(), done() deletes the dialog if the
  Qt::WA_DeleteOnClose flag is set. If the dialog is the application's
  main widget, the application terminates. If the dialog is the
  last window closed, the QApplication::lastWindowClosed() signal is
  emitted.

  \sa accept(), reject(), QApplication::activeWindow(), QCoreApplication::quit()
*/

void QDialog::done(int r)
{
    Q_D(QDialog);
    d->hide(r);
    d->finalize(r, r);
}

/*!
  Hides the modal dialog and sets the result code to \c Accepted.

  \sa reject(), done()
*/

void QDialog::accept()
{
    done(Accepted);
}

/*!
  Hides the modal dialog and sets the result code to \c Rejected.

  \sa accept(), done()
*/

void QDialog::reject()
{
    done(Rejected);
}

/*! \reimp */
bool QDialog::eventFilter(QObject *o, QEvent *e)
{
    return QWidget::eventFilter(o, e);
}

/*****************************************************************************
  Event handlers
 *****************************************************************************/

#ifndef QT_NO_CONTEXTMENU
/*! \reimp */
void QDialog::contextMenuEvent(QContextMenuEvent *e)
{
#if !QT_CONFIG(whatsthis) || !QT_CONFIG(menu)
    Q_UNUSED(e);
#else
    QWidget *w = childAt(e->pos());
    if (!w) {
        w = rect().contains(e->pos()) ? this : nullptr;
        if (!w)
            return;
    }
    while (w && w->whatsThis().size() == 0 && !w->testAttribute(Qt::WA_CustomWhatsThis))
        w = w->isWindow() ? nullptr : w->parentWidget();
    if (w) {
        QPointer<QMenu> p = new QMenu(this);
        QAction *wt = p.data()->addAction(tr("What's This?"));
        if (p.data()->exec(e->globalPos()) == wt) {
            QHelpEvent e(QEvent::WhatsThis, w->rect().center(),
                         w->mapToGlobal(w->rect().center()));
            QCoreApplication::sendEvent(w, &e);
        }
        delete p.data();
    }
#endif
}
#endif // QT_NO_CONTEXTMENU

/*! \reimp */
void QDialog::keyPressEvent(QKeyEvent *e)
{
#ifndef QT_NO_SHORTCUT
    //   Calls reject() if Escape is pressed. Simulates a button
    //   click for the default button if Enter is pressed. Move focus
    //   for the arrow keys. Ignore the rest.
    if (e->matches(QKeySequence::Cancel)) {
        reject();
    } else
#endif
    if (!e->modifiers() || (e->modifiers() & Qt::KeypadModifier && e->key() == Qt::Key_Enter)) {
        switch (e->key()) {
#if QT_CONFIG(pushbutton)
        case Qt::Key_Enter:
        case Qt::Key_Return: {
            QList<QPushButton*> list = findChildren<QPushButton*>();
            for (int i=0; i<list.size(); ++i) {
                QPushButton *pb = list.at(i);
                if (pb->isDefault() && pb->isVisible()) {
                    if (pb->isEnabled())
                        pb->click();
                    return;
                }
            }
        }
        break;
#endif
        default:
            e->ignore();
            return;
        }
    } else {
        e->ignore();
    }
}

/*! \reimp */
void QDialog::closeEvent(QCloseEvent *e)
{
#if QT_CONFIG(whatsthis)
    if (isModal() && QWhatsThis::inWhatsThisMode())
        QWhatsThis::leaveWhatsThisMode();
#endif
    if (isVisible()) {
        QPointer<QObject> that = this;
        reject();
        if (that && isVisible())
            e->ignore();
    } else {
        e->accept();
    }
}

/*****************************************************************************
  Geometry management.
 *****************************************************************************/

/*! \reimp
*/

void QDialog::setVisible(bool visible)
{
    Q_D(QDialog);
    if (!testAttribute(Qt::WA_DontShowOnScreen) && d->canBeNativeDialog() && d->setNativeDialogVisible(visible))
        return;

    // We should not block windows by the invisible modal dialog
    // if a platform-specific dialog is implemented as an in-process
    // Qt window, because in this case it will also be blocked.
    const bool dontBlockWindows = testAttribute(Qt::WA_DontShowOnScreen)
            && d->styleHint(QPlatformDialogHelper::DialogIsQtWindow).toBool();
    Qt::WindowModality oldModality;
    bool wasModalitySet;

    if (dontBlockWindows) {
        oldModality = windowModality();
        wasModalitySet = testAttribute(Qt::WA_SetWindowModality);
        setWindowModality(Qt::NonModal);
    }

    if (visible) {
        if (testAttribute(Qt::WA_WState_ExplicitShowHide) && !testAttribute(Qt::WA_WState_Hidden))
            return;

        QWidget::setVisible(visible);
#if QT_DEPRECATED_SINCE(5, 13)
QT_WARNING_PUSH
QT_WARNING_DISABLE_DEPRECATED
        showExtension(d->doShowExtension);
QT_WARNING_POP
#endif
        QWidget *fw = window()->focusWidget();
        if (!fw)
            fw = this;

        /*
          The following block is to handle a special case, and does not
          really follow propper logic in concern of autoDefault and TAB
          order. However, it's here to ease usage for the users. If a
          dialog has a default QPushButton, and first widget in the TAB
          order also is a QPushButton, then we give focus to the main
          default QPushButton. This simplifies code for the developers,
          and actually catches most cases... If not, then they simply
          have to use [widget*]->setFocus() themselves...
        */
#if QT_CONFIG(pushbutton)
        if (d->mainDef && fw->focusPolicy() == Qt::NoFocus) {
            QWidget *first = fw;
            while ((first = first->nextInFocusChain()) != fw && first->focusPolicy() == Qt::NoFocus)
                ;
            if (first != d->mainDef && qobject_cast<QPushButton*>(first))
                d->mainDef->setFocus();
        }
        if (!d->mainDef && isWindow()) {
            QWidget *w = fw;
            while ((w = w->nextInFocusChain()) != fw) {
                QPushButton *pb = qobject_cast<QPushButton *>(w);
                if (pb && pb->autoDefault() && pb->focusPolicy() != Qt::NoFocus) {
                    pb->setDefault(true);
                    break;
                }
            }
        }
#endif
        if (fw && !fw->hasFocus()) {
            QFocusEvent e(QEvent::FocusIn, Qt::TabFocusReason);
            QCoreApplication::sendEvent(fw, &e);
        }

#ifndef QT_NO_ACCESSIBILITY
        QAccessibleEvent event(this, QAccessible::DialogStart);
        QAccessible::updateAccessibility(&event);
#endif

    } else {
        if (testAttribute(Qt::WA_WState_ExplicitShowHide) && testAttribute(Qt::WA_WState_Hidden))
            return;

#ifndef QT_NO_ACCESSIBILITY
        if (isVisible()) {
            QAccessibleEvent event(this, QAccessible::DialogEnd);
            QAccessible::updateAccessibility(&event);
        }
#endif

        // Reimplemented to exit a modal event loop when the dialog is hidden.
        QWidget::setVisible(visible);
        if (d->eventLoop)
            d->eventLoop->exit();
    }

    if (dontBlockWindows) {
        setWindowModality(oldModality);
        setAttribute(Qt::WA_SetWindowModality, wasModalitySet);
    }

#if QT_CONFIG(pushbutton)
    const QPlatformTheme *theme = QGuiApplicationPrivate::platformTheme();
    if (d->mainDef && isActiveWindow()
        && theme->themeHint(QPlatformTheme::DialogSnapToDefaultButton).toBool())
        QCursor::setPos(d->mainDef->mapToGlobal(d->mainDef->rect().center()));
#endif
}

/*!\reimp */
void QDialog::showEvent(QShowEvent *event)
{
    if (!event->spontaneous() && !testAttribute(Qt::WA_Moved)) {
        Qt::WindowStates  state = windowState();
        adjustPosition(parentWidget());
        setAttribute(Qt::WA_Moved, false); // not really an explicit position
        if (state != windowState())
            setWindowState(state);
    }
}

/*! \internal */
void QDialog::adjustPosition(QWidget* w)
{

    if (const QPlatformTheme *theme = QGuiApplicationPrivate::platformTheme())
        if (theme->themeHint(QPlatformTheme::WindowAutoPlacement).toBool())
            return;
    QPoint p(0, 0);
    int extraw = 0, extrah = 0, scrn = 0;
    if (w)
        w = w->window();
    QRect desk;
    if (w) {
        scrn = QDesktopWidgetPrivate::screenNumber(w);
    } else if (QDesktopWidgetPrivate::isVirtualDesktop()) {
        scrn = QDesktopWidgetPrivate::screenNumber(QCursor::pos());
    } else {
        scrn = QDesktopWidgetPrivate::screenNumber(this);
    }
    desk = QDesktopWidgetPrivate::availableGeometry(scrn);

    QWidgetList list = QApplication::topLevelWidgets();
    for (int i = 0; (extraw == 0 || extrah == 0) && i < list.size(); ++i) {
        QWidget * current = list.at(i);
        if (current->isVisible()) {
            int framew = current->geometry().x() - current->x();
            int frameh = current->geometry().y() - current->y();

            extraw = qMax(extraw, framew);
            extrah = qMax(extrah, frameh);
        }
    }

    // sanity check for decoration frames. With embedding, we
    // might get extraordinary values
    if (extraw == 0 || extrah == 0 || extraw >= 10 || extrah >= 40) {
        extrah = 40;
        extraw = 10;
    }


    if (w) {
        // Use pos() if the widget is embedded into a native window
        QPoint pp;
        if (w->windowHandle() && qvariant_cast<WId>(w->windowHandle()->property("_q_embedded_native_parent_handle")))
            pp = w->pos();
        else
            pp = w->mapToGlobal(QPoint(0,0));
        p = QPoint(pp.x() + w->width()/2,
                    pp.y() + w->height()/ 2);
    } else {
        // p = middle of the desktop
        p = QPoint(desk.x() + desk.width()/2, desk.y() + desk.height()/2);
    }

    // p = origin of this
    p = QPoint(p.x()-width()/2 - extraw,
                p.y()-height()/2 - extrah);


    if (p.x() + extraw + width() > desk.x() + desk.width())
        p.setX(desk.x() + desk.width() - width() - extraw);
    if (p.x() < desk.x())
        p.setX(desk.x());

    if (p.y() + extrah + height() > desk.y() + desk.height())
        p.setY(desk.y() + desk.height() - height() - extrah);
    if (p.y() < desk.y())
        p.setY(desk.y());

    // QTBUG-52735: Manually set the correct target screen since scaling in a
    // subsequent call to QWindow::resize() may otherwise use the wrong factor
    // if the screen changed notification is still in an event queue.
    if (scrn >= 0) {
        if (QWindow *window = windowHandle())
            window->setScreen(QGuiApplication::screens().at(scrn));
    }

    move(p);
}

#if QT_DEPRECATED_SINCE(5, 13)
/*!
    \obsolete

    If \a orientation is Qt::Horizontal, the extension will be displayed
    to the right of the dialog's main area. If \a orientation is
    Qt::Vertical, the extension will be displayed below the dialog's main
    area.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa setExtension()
*/
void QDialog::setOrientation(Qt::Orientation orientation)
{
    Q_D(QDialog);
    d->orientation = orientation;
}

/*!
    \obsolete

    Returns the dialog's extension orientation.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa extension()
*/
Qt::Orientation QDialog::orientation() const
{
    Q_D(const QDialog);
    return d->orientation;
}

/*!
    \obsolete

    Sets the widget, \a extension, to be the dialog's extension,
    deleting any previous extension. The dialog takes ownership of the
    extension. Note that if \nullptr is passed, any existing extension will be
    deleted. This function must only be called while the dialog is hidden.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa showExtension(), setOrientation()
*/
void QDialog::setExtension(QWidget* extension)
{
    Q_D(QDialog);
    delete d->extension;
    d->extension = extension;

    if (!extension)
        return;

    if (extension->parentWidget() != this)
        extension->setParent(this);
    extension->hide();
}

/*!
    \obsolete

    Returns the dialog's extension or \nullptr if no extension has been
    defined.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa showExtension(), setOrientation()
*/
QWidget* QDialog::extension() const
{
    Q_D(const QDialog);
    return d->extension;
}


/*!
    \obsolete

    If \a showIt is true, the dialog's extension is shown; otherwise the
    extension is hidden.

    Instead of using this functionality, we recommend that you simply call
    show() or hide() on the part of the dialog that you want to use as an
    extension. See the \l{Extension Example} for details.

    \sa show(), setExtension(), setOrientation()
*/
void QDialog::showExtension(bool showIt)
{
    Q_D(QDialog);
    d->doShowExtension = showIt;
    if (!d->extension)
        return;
    if (!testAttribute(Qt::WA_WState_Visible))
        return;
    if (d->extension->isVisible() == showIt)
        return;

    if (showIt) {
        d->size = size();
        d->min = minimumSize();
        d->max = maximumSize();
        if (layout())
            layout()->setEnabled(false);
        QSize s(d->extension->sizeHint()
                 .expandedTo(d->extension->minimumSize())
                 .boundedTo(d->extension->maximumSize()));
        if (d->orientation == Qt::Horizontal) {
            int h = qMax(height(), s.height());
            d->extension->setGeometry(width(), 0, s.width(), h);
            setFixedSize(width() + s.width(), h);
        } else {
            int w = qMax(width(), s.width());
            d->extension->setGeometry(0, height(), w, s.height());
            setFixedSize(w, height() + s.height());
        }
        d->extension->show();
#if QT_CONFIG(sizegrip)
        const bool sizeGripEnabled = isSizeGripEnabled();
        setSizeGripEnabled(false);
        d->sizeGripEnabled = sizeGripEnabled;
#endif
    } else {
        d->extension->hide();
        // workaround for CDE window manager that won't shrink with (-1,-1)
        setMinimumSize(d->min.expandedTo(QSize(1, 1)));
        setMaximumSize(d->max);
        resize(d->size);
        if (layout())
            layout()->setEnabled(true);
#if QT_CONFIG(sizegrip)
        setSizeGripEnabled(d->sizeGripEnabled);
#endif
    }
}
#endif

/*! \reimp */
QSize QDialog::sizeHint() const
{
    Q_D(const QDialog);
    if (d->extension) {
        if (d->orientation == Qt::Horizontal)
            return QSize(QWidget::sizeHint().width(),
                        qMax(QWidget::sizeHint().height(),d->extension->sizeHint().height()));
        else
            return QSize(qMax(QWidget::sizeHint().width(), d->extension->sizeHint().width()),
                        QWidget::sizeHint().height());
    }
    return QWidget::sizeHint();
}


/*! \reimp */
QSize QDialog::minimumSizeHint() const
{
    Q_D(const QDialog);
    if (d->extension) {
        if (d->orientation == Qt::Horizontal)
            return QSize(QWidget::minimumSizeHint().width(),
                        qMax(QWidget::minimumSizeHint().height(), d->extension->minimumSizeHint().height()));
        else
            return QSize(qMax(QWidget::minimumSizeHint().width(), d->extension->minimumSizeHint().width()),
                        QWidget::minimumSizeHint().height());
    }

    return QWidget::minimumSizeHint();
}

/*!
    \property QDialog::modal
    \brief whether show() should pop up the dialog as modal or modeless

    By default, this property is \c false and show() pops up the dialog
    as modeless. Setting this property to true is equivalent to setting
    QWidget::windowModality to Qt::ApplicationModal.

    exec() ignores the value of this property and always pops up the
    dialog as modal.

    \sa QWidget::windowModality, show(), exec()
*/

void QDialog::setModal(bool modal)
{
    setAttribute(Qt::WA_ShowModal, modal);
}


bool QDialog::isSizeGripEnabled() const
{
#if QT_CONFIG(sizegrip)
    Q_D(const QDialog);
    return !!d->resizer;
#else
    return false;
#endif
}


void QDialog::setSizeGripEnabled(bool enabled)
{
#if !QT_CONFIG(sizegrip)
    Q_UNUSED(enabled);
#else
    Q_D(QDialog);
#if QT_CONFIG(sizegrip)
    d->sizeGripEnabled = enabled;
    if (enabled && d->doShowExtension)
        return;
#endif
    if (!enabled != !d->resizer) {
        if (enabled) {
            d->resizer = new QSizeGrip(this);
            // adjustSize() processes all events, which is suboptimal
            d->resizer->resize(d->resizer->sizeHint());
            if (isRightToLeft())
                d->resizer->move(rect().bottomLeft() -d->resizer->rect().bottomLeft());
            else
                d->resizer->move(rect().bottomRight() -d->resizer->rect().bottomRight());
            d->resizer->raise();
            d->resizer->show();
        } else {
            delete d->resizer;
            d->resizer = nullptr;
        }
    }
#endif // QT_CONFIG(sizegrip)
}



/*! \reimp */
void QDialog::resizeEvent(QResizeEvent *)
{
#if QT_CONFIG(sizegrip)
    Q_D(QDialog);
    if (d->resizer) {
        if (isRightToLeft())
            d->resizer->move(rect().bottomLeft() -d->resizer->rect().bottomLeft());
        else
            d->resizer->move(rect().bottomRight() -d->resizer->rect().bottomRight());
        d->resizer->raise();
    }
#endif
}

/*! \fn void QDialog::finished(int result)
    \since 4.1

    This signal is emitted when the dialog's \a result code has been
    set, either by the user or by calling done(), accept(), or
    reject().

    Note that this signal is \e not emitted when hiding the dialog
    with hide() or setVisible(false). This includes deleting the
    dialog while it is visible.

    \sa accepted(), rejected()
*/

/*! \fn void QDialog::accepted()
    \since 4.1

    This signal is emitted when the dialog has been accepted either by
    the user or by calling accept() or done() with the
    QDialog::Accepted argument.

    Note that this signal is \e not emitted when hiding the dialog
    with hide() or setVisible(false). This includes deleting the
    dialog while it is visible.

    \sa finished(), rejected()
*/

/*! \fn void QDialog::rejected()
    \since 4.1

    This signal is emitted when the dialog has been rejected either by
    the user or by calling reject() or done() with the
    QDialog::Rejected argument.

    Note that this signal is \e not emitted when hiding the dialog
    with hide() or setVisible(false). This includes deleting the
    dialog while it is visible.

    \sa finished(), accepted()
*/

QT_END_NAMESPACE
#include "moc_qdialog.cpp"