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
|
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html><head><title>QMessageBox Class Reference</title><style>h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm }
a:link { color: #004faf; text-decoration: none }
a:visited { color: #672967; text-decoration: none }
td.postheader { font-family: sans-serif }
tr.address { font-family: sans-serif }
body { background: #ffffff; color: black; }
</style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">  </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QMessageBox Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1><p>The QMessageBox class provides a modal dialog for informing the
user or for asking the user a question and receiving an answer.
<a href="#details">More...</a></p>
<p>Inherits <a href="qdialog.html">QDialog</a>.</p><h3>Types</h3><ul><li><div class="fn" />enum <b><a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a></b> { InvalidRole, AcceptRole, RejectRole, DestructiveRole, ..., ApplyRole }</li><li><div class="fn" />enum <b><a href="qmessagebox.html#Icon-enum">Icon</a></b> { NoIcon, Information, Warning, Critical, Question }</li><li><div class="fn" />enum <b><a href="qmessagebox.html#StandardButton-enum">StandardButton</a></b> { NoButton, Ok, Save, SaveAll, ..., ButtonMask }</li><li><div class="fn" />class <b><a href="qmessagebox-standardbuttons.html">StandardButtons</a></b></li></ul><h3>Methods</h3><ul><li><div class="fn" /><b><a href="qmessagebox.html#QMessageBox">__init__</a></b> (<i>self</i>, QWidget <i>parent</i> = None)</li><li><div class="fn" /><b><a href="qmessagebox.html#QMessageBox-2">__init__</a></b> (<i>self</i>, Icon <i>icon</i>, QString <i>title</i>, QString <i>text</i>, StandardButtons <i>buttons</i> = QMessageBox.NoButton, QWidget <i>parent</i> = None, Qt.WindowFlags <i>flags</i> = Qt.Dialog|Qt.MSWindowsFixedSizeDialogHint)</li><li><div class="fn" /><b><a href="qmessagebox.html#QMessageBox-3">__init__</a></b> (<i>self</i>, QString <i>title</i>, QString <i>text</i>, Icon <i>icon</i>, int <i>button0</i>, int <i>button1</i>, int <i>button2</i>, QWidget <i>parent</i> = None, Qt.WindowFlags <i>flags</i> = Qt.Dialog|Qt.MSWindowsFixedSizeDialogHint)</li><li><div class="fn" /><b><a href="qmessagebox.html#addButton">addButton</a></b> (<i>self</i>, QAbstractButton <i>button</i>, ButtonRole <i>role</i>)</li><li><div class="fn" />QPushButton <b><a href="qmessagebox.html#addButton-2">addButton</a></b> (<i>self</i>, QString <i>text</i>, ButtonRole <i>role</i>)</li><li><div class="fn" />QPushButton <b><a href="qmessagebox.html#addButton-3">addButton</a></b> (<i>self</i>, StandardButton <i>button</i>)</li><li><div class="fn" />QAbstractButton <b><a href="qmessagebox.html#button">button</a></b> (<i>self</i>, StandardButton <i>which</i>)</li><li><div class="fn" />ButtonRole <b><a href="qmessagebox.html#buttonRole">buttonRole</a></b> (<i>self</i>, QAbstractButton <i>button</i>)</li><li><div class="fn" />unknown-type <b><a href="qmessagebox.html#buttons">buttons</a></b> (<i>self</i>)</li><li><div class="fn" />QString <b><a href="qmessagebox.html#buttonText">buttonText</a></b> (<i>self</i>, int <i>button</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#changeEvent">changeEvent</a></b> (<i>self</i>, QEvent)</li><li><div class="fn" />QAbstractButton <b><a href="qmessagebox.html#clickedButton">clickedButton</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#closeEvent">closeEvent</a></b> (<i>self</i>, QCloseEvent)</li><li><div class="fn" />QPushButton <b><a href="qmessagebox.html#defaultButton">defaultButton</a></b> (<i>self</i>)</li><li><div class="fn" />QString <b><a href="qmessagebox.html#detailedText">detailedText</a></b> (<i>self</i>)</li><li><div class="fn" />QAbstractButton <b><a href="qmessagebox.html#escapeButton">escapeButton</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qmessagebox.html#event">event</a></b> (<i>self</i>, QEvent <i>e</i>)</li><li><div class="fn" />Icon <b><a href="qmessagebox.html#icon">icon</a></b> (<i>self</i>)</li><li><div class="fn" />QPixmap <b><a href="qmessagebox.html#iconPixmap">iconPixmap</a></b> (<i>self</i>)</li><li><div class="fn" />QString <b><a href="qmessagebox.html#informativeText">informativeText</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#keyPressEvent">keyPressEvent</a></b> (<i>self</i>, QKeyEvent)</li><li><div class="fn" /><b><a href="qmessagebox.html#open">open</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#open-2">open</a></b> (<i>self</i>, QObject <i>receiver</i>, object <i>member</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#open-3">open</a></b> (<i>self</i>, object <i>slot</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#removeButton">removeButton</a></b> (<i>self</i>, QAbstractButton <i>button</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#resizeEvent">resizeEvent</a></b> (<i>self</i>, QResizeEvent)</li><li><div class="fn" /><b><a href="qmessagebox.html#setButtonText">setButtonText</a></b> (<i>self</i>, int <i>button</i>, QString)</li><li><div class="fn" /><b><a href="qmessagebox.html#setDefaultButton">setDefaultButton</a></b> (<i>self</i>, QPushButton <i>button</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#setDefaultButton-2">setDefaultButton</a></b> (<i>self</i>, StandardButton <i>button</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#setDetailedText">setDetailedText</a></b> (<i>self</i>, QString <i>text</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#setEscapeButton">setEscapeButton</a></b> (<i>self</i>, QAbstractButton <i>button</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#setEscapeButton-2">setEscapeButton</a></b> (<i>self</i>, StandardButton <i>button</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#setIcon">setIcon</a></b> (<i>self</i>, Icon)</li><li><div class="fn" /><b><a href="qmessagebox.html#setIconPixmap">setIconPixmap</a></b> (<i>self</i>, QPixmap)</li><li><div class="fn" /><b><a href="qmessagebox.html#setInformativeText">setInformativeText</a></b> (<i>self</i>, QString <i>text</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#setStandardButtons">setStandardButtons</a></b> (<i>self</i>, StandardButtons <i>buttons</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#setText">setText</a></b> (<i>self</i>, QString)</li><li><div class="fn" /><b><a href="qmessagebox.html#setTextFormat">setTextFormat</a></b> (<i>self</i>, Qt.TextFormat)</li><li><div class="fn" /><b><a href="qmessagebox.html#setWindowModality">setWindowModality</a></b> (<i>self</i>, Qt.WindowModality <i>windowModality</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#setWindowTitle">setWindowTitle</a></b> (<i>self</i>, QString <i>title</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#showEvent">showEvent</a></b> (<i>self</i>, QShowEvent)</li><li><div class="fn" />QSize <b><a href="qmessagebox.html#sizeHint">sizeHint</a></b> (<i>self</i>)</li><li><div class="fn" />StandardButton <b><a href="qmessagebox.html#standardButton">standardButton</a></b> (<i>self</i>, QAbstractButton <i>button</i>)</li><li><div class="fn" />StandardButtons <b><a href="qmessagebox.html#standardButtons">standardButtons</a></b> (<i>self</i>)</li><li><div class="fn" />QString <b><a href="qmessagebox.html#text">text</a></b> (<i>self</i>)</li><li><div class="fn" />Qt.TextFormat <b><a href="qmessagebox.html#textFormat">textFormat</a></b> (<i>self</i>)</li></ul><h3>Static Methods</h3><ul><li><div class="fn" /><b><a href="qmessagebox.html#about">about</a></b> (QWidget <i>parent</i>, QString <i>caption</i>, QString <i>text</i>)</li><li><div class="fn" /><b><a href="qmessagebox.html#aboutQt">aboutQt</a></b> (QWidget <i>parent</i>, QString <i>title</i> = '')</li><li><div class="fn" />StandardButton <b><a href="qmessagebox.html#critical">critical</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, StandardButtons <i>buttons</i> = QMessageBox.Ok, StandardButton <i>defaultButton</i> = QMessageBox.NoButton)</li><li><div class="fn" />int <b><a href="qmessagebox.html#critical-2">critical</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, int <i>button0</i>, int <i>button1</i>, int <i>button2</i> = 0)</li><li><div class="fn" />int <b><a href="qmessagebox.html#critical-3">critical</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, QString <i>button0Text</i>, QString <i>button1Text</i> = '', QString <i>button2Text</i> = '', int <i>defaultButtonNumber</i> = 0, int <i>escapeButtonNumber</i> = -1)</li><li><div class="fn" />StandardButton <b><a href="qmessagebox.html#information">information</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, StandardButtons <i>buttons</i> = QMessageBox.Ok, StandardButton <i>defaultButton</i> = QMessageBox.NoButton)</li><li><div class="fn" />int <b><a href="qmessagebox.html#information-2">information</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, int <i>button0</i>, int <i>button1</i> = 0, int <i>button2</i> = 0)</li><li><div class="fn" />int <b><a href="qmessagebox.html#information-3">information</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, QString <i>button0Text</i>, QString <i>button1Text</i> = '', QString <i>button2Text</i> = '', int <i>defaultButtonNumber</i> = 0, int <i>escapeButtonNumber</i> = -1)</li><li><div class="fn" />StandardButton <b><a href="qmessagebox.html#question">question</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, StandardButtons <i>buttons</i> = QMessageBox.Ok, StandardButton <i>defaultButton</i> = QMessageBox.NoButton)</li><li><div class="fn" />int <b><a href="qmessagebox.html#question-2">question</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, int <i>button0</i>, int <i>button1</i> = 0, int <i>button2</i> = 0)</li><li><div class="fn" />int <b><a href="qmessagebox.html#question-3">question</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, QString <i>button0Text</i>, QString <i>button1Text</i> = '', QString <i>button2Text</i> = '', int <i>defaultButtonNumber</i> = 0, int <i>escapeButtonNumber</i> = -1)</li><li><div class="fn" />QPixmap <b><a href="qmessagebox.html#standardIcon">standardIcon</a></b> (Icon <i>icon</i>)</li><li><div class="fn" />StandardButton <b><a href="qmessagebox.html#warning">warning</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, StandardButtons <i>buttons</i> = QMessageBox.Ok, StandardButton <i>defaultButton</i> = QMessageBox.NoButton)</li><li><div class="fn" />int <b><a href="qmessagebox.html#warning-2">warning</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, int <i>button0</i>, int <i>button1</i>, int <i>button2</i> = 0)</li><li><div class="fn" />int <b><a href="qmessagebox.html#warning-3">warning</a></b> (QWidget <i>parent</i>, QString <i>title</i>, QString <i>text</i>, QString <i>button0Text</i>, QString <i>button1Text</i> = '', QString <i>button2Text</i> = '', int <i>defaultButtonNumber</i> = 0, int <i>escapeButtonNumber</i> = -1)</li></ul><h3>Qt Signals</h3><ul><li><div class="fn" />void <b><a href="qmessagebox.html#buttonClicked">buttonClicked</a></b> ( ::QAbstractButton*)</li></ul><a name="details" /><hr /><h2>Detailed Description</h2><p>The QMessageBox class provides a modal dialog for informing the
user or for asking the user a question and receiving an answer.</p>
<p>A message box displays a primary <a href="qmessagebox.html#text-prop">text</a> to alert the user to a
situation, an <a href="qmessagebox.html#informativeText-prop">informative text</a> to
further explain the alert or to ask the user a question, and an
optional <a href="qmessagebox.html#detailedText-prop">detailed
text</a> to provide even more data if the user requests it. A
message box can also display an <a href="qmessagebox.html#icon-prop">icon</a> and <a href="qmessagebox.html#standardButtons-prop">standard buttons</a> for
accepting a user response.</p>
<p>Two APIs for using QMessageBox are provided, the property-based
API, and the static functions. Calling one of the static functions
is the simpler approach, but it is less flexible than using the
property-based API, and the result is less informative. Using the
property-based API is recommended.</p>
<a id="the-property-based-api" name="the-property-based-api" />
<h3>The Property-based API</h3>
<p>To use the property-based API, construct an instance of
QMessageBox, set the desired properties, and call <a href="qmessagebox.html#exec">exec_</a>() to show the message. The
simplest configuration is to set only the <a href="qmessagebox.html#text-prop">message text</a> property.</p>
<pre class="cpp">
<span class="type">QMessageBox</span> msgBox;
msgBox<span class="operator">.</span><a href="qmessagebox.html#text-prop">setText</a>(<span class="string">"The document has been modified."</span>);
msgBox<span class="operator">.</span><a href="qmessagebox.html#exec">exec_</a>();
</pre>
<p>The user must click the <b>OK</b> button to dismiss the message
box. The rest of the GUI is blocked until the message box is
dismissed.</p>
<p class="centerAlign"><img alt="" src="images/msgbox1.png" /></p>
<p>A better approach than just alerting the user to an event is to
also ask the user what to do about it. Store the question in the
<a href="qmessagebox.html#informativeText-prop">informative
text</a> property, and set the <a href="qmessagebox.html#standardButtons-prop">standard buttons</a>
property to the set of buttons you want as the set of user
responses. The buttons are specified by combining values from
<a href="qmessagebox.html#StandardButton-enum">StandardButtons</a>
using the bitwise OR operator. The display order for the buttons is
platform-dependent. For example, on Windows, <b>Save</b> is
displayed to the left of <b>Cancel</b>, whereas on Mac OS, the
order is reversed.</p>
<p>Mark one of your standard buttons to be your <a href="qmessagebox.html#defaultButton">default button</a>.</p>
<pre class="cpp">
<span class="type">QMessageBox</span> msgBox;
msgBox<span class="operator">.</span><a href="qmessagebox.html#text-prop">setText</a>(<span class="string">"The document has been modified."</span>);
msgBox<span class="operator">.</span><a href="qmessagebox.html#informativeText-prop">setInformativeText</a>(<span class="string">"Do you want to save your changes?"</span>);
msgBox<span class="operator">.</span><a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a>(<span class="type">QMessageBox</span><span class="operator">.</span>Save <span class="operator">|</span> <span class="type">QMessageBox</span><span class="operator">.</span>Discard <span class="operator">|</span> <span class="type">QMessageBox</span><span class="operator">.</span>Cancel);
msgBox<span class="operator">.</span><a href="qmessagebox.html#setDefaultButton">setDefaultButton</a>(<span class="type">QMessageBox</span><span class="operator">.</span>Save);
<span class="type">int</span> ret <span class="operator">=</span> msgBox<span class="operator">.</span><a href="qmessagebox.html#exec">exec_</a>();
</pre>
<p>This is the approach recommended in the <a href="http://developer.apple.com/library/mac/documentation/UserExperience/Conceptual/AppleHIGuidelines/Windows/Windows.html#//apple_ref/doc/uid/20000961-BABCAJID">
Mac OS X Guidelines</a>. Similar guidelines apply for the other
platforms, but note the different ways the <a href="qmessagebox.html#informativeText-prop">informative text</a> is
handled for different platforms.</p>
<p class="centerAlign"><img alt="" src="images/msgbox2.png" /></p>
<p>The <a href="qmessagebox.html#exec">exec_</a>() slot returns the
<a href="qmessagebox.html#StandardButton-enum">StandardButtons</a>
value of the button that was clicked.</p>
<pre class="cpp">
<span class="keyword">switch</span> (ret) {
<span class="keyword">case</span> <span class="type">QMessageBox</span><span class="operator">.</span>Save:
<span class="comment">// Save was clicked</span>
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type">QMessageBox</span><span class="operator">.</span>Discard:
<span class="comment">// Don't Save was clicked</span>
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type">QMessageBox</span><span class="operator">.</span>Cancel:
<span class="comment">// Cancel was clicked</span>
<span class="keyword">break</span>;
<span class="keyword">default</span>:
<span class="comment">// should never be reached</span>
<span class="keyword">break</span>;
}
</pre>
<p>To give the user more information to help him answer the
question, set the <a href="qmessagebox.html#detailedText-prop">detailed text</a> property. If
the <a href="qmessagebox.html#detailedText-prop">detailed text</a>
property is set, the <b>Show Details...</b> button will be
shown.</p>
<p class="centerAlign"><img alt="" src="images/msgbox3.png" /></p>
<p>Clicking the <b>Show Details...</b> button displays the detailed
text.</p>
<p class="centerAlign"><img alt="" src="images/msgbox4.png" /></p>
<a id="rich-text-and-the-text-format-property" name="rich-text-and-the-text-format-property" />
<h4>Rich Text and the Text Format Property</h4>
<p>The <a href="qmessagebox.html#detailedText-prop">detailed
text</a> property is always interpreted as plain text. The <a href="qmessagebox.html#text-prop">main text</a> and <a href="qmessagebox.html#informativeText-prop">informative text</a>
properties can be either plain text or rich text. These strings are
interpreted according to the setting of the <a href="qmessagebox.html#textFormat-prop">text format</a> property. The
default setting is <a href="qt.html#TextFormat-enum">auto-text</a>.</p>
<p>Note that for some plain text strings containing XML
meta-characters, the auto-text <a href="qt.html#mightBeRichText">rich text detection test</a> may fail
causing your plain text string to be interpreted incorrectly as
rich text. In these rare cases, use <a href="qt.html#convertFromPlainText">Qt.convertFromPlainText</a>() to
convert your plain text string to a visually equivalent rich text
string, or set the <a href="qmessagebox.html#textFormat-prop">text
format</a> property explicitly with <a href="qmessagebox.html#textFormat-prop">setTextFormat</a>().</p>
<a id="severity-levels-and-the-icon-and-pixmap-properties" name="severity-levels-and-the-icon-and-pixmap-properties" />
<h4>Severity Levels and the Icon and Pixmap Properties</h4>
<p>QMessageBox supports four predefined message severity levels, or
message types, which really only differ in the predefined icon they
each show. Specify one of the four predefined message types by
setting the <a href="qmessagebox.html#icon-prop">icon</a> property
to one of the <a href="qmessagebox.html#Icon-enum">predefined
icons</a>. The following rules are guidelines:</p>
<table class="generic">
<tr class="odd" valign="top">
<td>
<p class="centerAlign"><img alt="" src="images/qmessagebox-quest.png" /></p>
</td>
<td><a href="qmessagebox.html#Icon-enum">Question</a></td>
<td>For asking a question during normal operations.</td>
</tr>
<tr class="even" valign="top">
<td>
<p class="centerAlign"><img alt="" src="images/qmessagebox-info.png" /></p>
</td>
<td><a href="qmessagebox.html#Icon-enum">Information</a></td>
<td>For reporting information about normal operations.</td>
</tr>
<tr class="odd" valign="top">
<td>
<p class="centerAlign"><img alt="" src="images/qmessagebox-warn.png" /></p>
</td>
<td><a href="qmessagebox.html#Icon-enum">Warning</a></td>
<td>For reporting non-critical errors.</td>
</tr>
<tr class="even" valign="top">
<td>
<p class="centerAlign"><img alt="" src="images/qmessagebox-crit.png" /></p>
</td>
<td><a href="qmessagebox.html#Icon-enum">Critical</a></td>
<td>For reporting critical errors.</td>
</tr>
</table>
<p><a href="qmessagebox.html#Icon-enum">Predefined icons</a> are
not defined by QMessageBox, but provided by the style. The default
value is <a href="qmessagebox.html#Icon-enum">No Icon</a>. The
message boxes are otherwise the same for all cases. When using a
standard icon, use the one recommended in the table, or use the one
recommended by the style guidelines for your platform. If none of
the standard icons is right for your message box, you can use a
custom icon by setting the <a href="qmessagebox.html#iconPixmap-prop">icon pixmap</a> property instead
of setting the <a href="qmessagebox.html#icon-prop">icon</a>
property.</p>
<p>In summary, to set an icon, use <i>either</i> <a href="qmessagebox.html#icon-prop">setIcon</a>() for one of the standard
icons, <i>or</i> <a href="qmessagebox.html#iconPixmap-prop">setIconPixmap</a>() for a custom
icon.</p>
<a id="the-static-functions-api" name="the-static-functions-api" />
<h3>The Static Functions API</h3>
<p>Building message boxes with the static functions API, although
convenient, is less flexible than using the property-based API,
because the static function signatures lack parameters for setting
the <a href="qmessagebox.html#informativeText-prop">informative
text</a> and <a href="qmessagebox.html#detailedText-prop">detailed
text</a> properties. One work-around for this has been to use the
<tt>title</tt> parameter as the message box main text and the
<tt>text</tt> parameter as the message box informative text.
Because this has the obvious drawback of making a less readable
message box, platform guidelines do not recommend it. The
<i>Microsoft Windows User Interface Guidelines</i> recommend using
the <a href="qcoreapplication.html#applicationName-prop">application name</a>
as the <a href="qmessagebox.html#setWindowTitle">window's
title</a>, which means that if you have an informative text in
addition to your main text, you must concatenate it to the
<tt>text</tt> parameter.</p>
<p>Note that the static function signatures have changed with
respect to their button parameters, which are now used to set the
<a href="qmessagebox.html#standardButtons-prop">standard
buttons</a> and the <a href="qmessagebox.html#defaultButton">default button</a>.</p>
<p>Static functions are available for creating <a href="qmessagebox.html#information">information</a>(), <a href="qmessagebox.html#question">question</a>(), <a href="qmessagebox.html#warning">warning</a>(), and <a href="qmessagebox.html#critical">critical</a>() message boxes.</p>
<pre class="cpp">
<span class="type">int</span> ret <span class="operator">=</span> <span class="type">QMessageBox</span><span class="operator">.</span><a href="qmessagebox.html#warning">warning</a>(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"My Application"</span>)<span class="operator">,</span>
tr(<span class="string">"The document has been modified.\n"</span>
<span class="string">"Do you want to save your changes?"</span>)<span class="operator">,</span>
<span class="type">QMessageBox</span><span class="operator">.</span>Save <span class="operator">|</span> <span class="type">QMessageBox</span><span class="operator">.</span>Discard
<span class="operator">|</span> <span class="type">QMessageBox</span><span class="operator">.</span>Cancel<span class="operator">,</span>
<span class="type">QMessageBox</span><span class="operator">.</span>Save);
</pre>
<p>The <a href="dialogs-standarddialogs.html">Standard Dialogs</a>
example shows how to use QMessageBox and the other built-in Qt
dialogs.</p>
<a id="advanced-usage" name="advanced-usage" />
<h3>Advanced Usage</h3>
<p>If the <a href="qmessagebox.html#StandardButton-enum">standard
buttons</a> are not flexible enough for your message box, you can
use the <a href="qmessagebox.html#addButton">addButton</a>()
overload that takes a text and a ButtonRoleto to add custom
buttons. The <a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a> is used by
QMessageBox to determine the ordering of the buttons on screen
(which varies according to the platform). You can test the value of
<a href="qmessagebox.html#clickedButton">clickedButton</a>() after
calling <a href="qmessagebox.html#exec">exec_</a>(). For
example,</p>
<pre class="cpp">
<span class="type">QMessageBox</span> msgBox;
<span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>connectButton <span class="operator">=</span> msgBox<span class="operator">.</span><a href="qmessagebox.html#addButton">addButton</a>(tr(<span class="string">"Connect"</span>)<span class="operator">,</span> <span class="type">QMessageBox</span><span class="operator">.</span>ActionRole);
<span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>abortButton <span class="operator">=</span> msgBox<span class="operator">.</span><a href="qmessagebox.html#addButton">addButton</a>(<span class="type">QMessageBox</span><span class="operator">.</span>Abort);
msgBox<span class="operator">.</span><a href="qmessagebox.html#exec">exec_</a>();
<span class="keyword">if</span> (msgBox<span class="operator">.</span>clickedButton() <span class="operator">=</span><span class="operator">=</span> connectButton) {
<span class="comment">// connect</span>
} <span class="keyword">else</span> <span class="keyword">if</span> (msgBox<span class="operator">.</span>clickedButton() <span class="operator">=</span><span class="operator">=</span> abortButton) {
<span class="comment">// abort</span>
}
</pre>
<a id="default-and-escape-keys" name="default-and-escape-keys" />
<h3>Default and Escape Keys</h3>
<p>The default button (i.e., the button activated when <b>Enter</b>
is pressed) can be specified using <a href="qmessagebox.html#setDefaultButton">setDefaultButton</a>(). If a
default button is not specified, QMessageBox tries to find one
based on the <a href="qmessagebox.html#ButtonRole-enum">button
roles</a> of the buttons used in the message box.</p>
<p>The escape button (the button activated when <b>Esc</b> is
pressed) can be specified using <a href="qmessagebox.html#setEscapeButton">setEscapeButton</a>(). If an
escape button is not specified, QMessageBox tries to find one using
these rules:</p>
<ol class="1">
<li>If there is only one button, it is the button activated when
<b>Esc</b> is pressed.</li>
<li>If there is a <a href="qmessagebox.html#StandardButton-enum">Cancel</a> button, it is the
button activated when <b>Esc</b> is pressed.</li>
<li>If there is exactly one button having either <a href="qmessagebox.html#ButtonRole-enum">the Reject role</a> or the
<a href="qmessagebox.html#ButtonRole-enum">the No role</a>, it is
the button activated when <b>Esc</b> is pressed.</li>
</ol>
<p>When an escape button can't be determined using these rules,
pressing <b>Esc</b> has no effect.</p>
<hr /><h2>Type Documentation</h2><h3 class="fn"><a name="ButtonRole-enum" />QMessageBox.ButtonRole</h3><p>This enum describes the roles that can be used to describe
buttons in the button box. Combinations of these roles are as flags
used to describe different aspects of their behavior.</p>
<table class="valuelist">
<tr class="odd" valign="top">
<th class="tblConst">Constant</th>
<th class="tblval">Value</th>
<th class="tbldscr">Description</th>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.InvalidRole</tt></td>
<td class="topAlign"><tt>-1</tt></td>
<td class="topAlign">The button is invalid.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.AcceptRole</tt></td>
<td class="topAlign"><tt>0</tt></td>
<td class="topAlign">Clicking the button causes the dialog to be
accepted (e.g. OK).</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.RejectRole</tt></td>
<td class="topAlign"><tt>1</tt></td>
<td class="topAlign">Clicking the button causes the dialog to be
rejected (e.g. Cancel).</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.DestructiveRole</tt></td>
<td class="topAlign"><tt>2</tt></td>
<td class="topAlign">Clicking the button causes a destructive
change (e.g. for Discarding Changes) and closes the dialog.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.ActionRole</tt></td>
<td class="topAlign"><tt>3</tt></td>
<td class="topAlign">Clicking the button causes changes to the
elements within the dialog.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.HelpRole</tt></td>
<td class="topAlign"><tt>4</tt></td>
<td class="topAlign">The button can be clicked to request
help.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.YesRole</tt></td>
<td class="topAlign"><tt>5</tt></td>
<td class="topAlign">The button is a "Yes"-like button.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.NoRole</tt></td>
<td class="topAlign"><tt>6</tt></td>
<td class="topAlign">The button is a "No"-like button.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.ApplyRole</tt></td>
<td class="topAlign"><tt>8</tt></td>
<td class="topAlign">The button applies current changes.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.ResetRole</tt></td>
<td class="topAlign"><tt>7</tt></td>
<td class="topAlign">The button resets the dialog's fields to
default values.</td>
</tr>
</table>
<p><b>See also</b> <a href="qmessagebox.html#StandardButton-enum">StandardButton</a>.</p>
<h3 class="fn"><a name="Icon-enum" />QMessageBox.Icon</h3><p>This enum has the following values:</p>
<table class="valuelist">
<tr class="odd" valign="top">
<th class="tblConst">Constant</th>
<th class="tblval">Value</th>
<th class="tbldscr">Description</th>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.NoIcon</tt></td>
<td class="topAlign"><tt>0</tt></td>
<td class="topAlign">the message box does not have any icon.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Question</tt></td>
<td class="topAlign"><tt>4</tt></td>
<td class="topAlign">an icon indicating that the message is asking
a question.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Information</tt></td>
<td class="topAlign"><tt>1</tt></td>
<td class="topAlign">an icon indicating that the message is nothing
out of the ordinary.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Warning</tt></td>
<td class="topAlign"><tt>2</tt></td>
<td class="topAlign">an icon indicating that the message is a
warning, but can be dealt with.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Critical</tt></td>
<td class="topAlign"><tt>3</tt></td>
<td class="topAlign">an icon indicating that the message represents
a critical problem.</td>
</tr>
</table>
<h3 class="fn"><a name="StandardButton-enum" />QMessageBox.StandardButton</h3><p>These enums describe flags for standard buttons. Each button has
a defined <a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a>.</p>
<table class="valuelist">
<tr class="odd" valign="top">
<th class="tblConst">Constant</th>
<th class="tblval">Value</th>
<th class="tbldscr">Description</th>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Ok</tt></td>
<td class="topAlign"><tt>0x00000400</tt></td>
<td class="topAlign">An "OK" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Open</tt></td>
<td class="topAlign"><tt>0x00002000</tt></td>
<td class="topAlign">A "Open" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Save</tt></td>
<td class="topAlign"><tt>0x00000800</tt></td>
<td class="topAlign">A "Save" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Cancel</tt></td>
<td class="topAlign"><tt>0x00400000</tt></td>
<td class="topAlign">A "Cancel" button defined with the <a href="qmessagebox.html#ButtonRole-enum">RejectRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Close</tt></td>
<td class="topAlign"><tt>0x00200000</tt></td>
<td class="topAlign">A "Close" button defined with the <a href="qmessagebox.html#ButtonRole-enum">RejectRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Discard</tt></td>
<td class="topAlign"><tt>0x00800000</tt></td>
<td class="topAlign">A "Discard" or "Don't Save" button, depending
on the platform, defined with the <a href="qmessagebox.html#ButtonRole-enum">DestructiveRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Apply</tt></td>
<td class="topAlign"><tt>0x02000000</tt></td>
<td class="topAlign">An "Apply" button defined with the <a href="qmessagebox.html#ButtonRole-enum">ApplyRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Reset</tt></td>
<td class="topAlign"><tt>0x04000000</tt></td>
<td class="topAlign">A "Reset" button defined with the <a href="qmessagebox.html#ButtonRole-enum">ResetRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.RestoreDefaults</tt></td>
<td class="topAlign"><tt>0x08000000</tt></td>
<td class="topAlign">A "Restore Defaults" button defined with the
<a href="qmessagebox.html#ButtonRole-enum">ResetRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Help</tt></td>
<td class="topAlign"><tt>0x01000000</tt></td>
<td class="topAlign">A "Help" button defined with the <a href="qmessagebox.html#ButtonRole-enum">HelpRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.SaveAll</tt></td>
<td class="topAlign"><tt>0x00001000</tt></td>
<td class="topAlign">A "Save All" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Yes</tt></td>
<td class="topAlign"><tt>0x00004000</tt></td>
<td class="topAlign">A "Yes" button defined with the <a href="qmessagebox.html#ButtonRole-enum">YesRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.YesToAll</tt></td>
<td class="topAlign"><tt>0x00008000</tt></td>
<td class="topAlign">A "Yes to All" button defined with the
<a href="qmessagebox.html#ButtonRole-enum">YesRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.No</tt></td>
<td class="topAlign"><tt>0x00010000</tt></td>
<td class="topAlign">A "No" button defined with the <a href="qmessagebox.html#ButtonRole-enum">NoRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.NoToAll</tt></td>
<td class="topAlign"><tt>0x00020000</tt></td>
<td class="topAlign">A "No to All" button defined with the <a href="qmessagebox.html#ButtonRole-enum">NoRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Abort</tt></td>
<td class="topAlign"><tt>0x00040000</tt></td>
<td class="topAlign">An "Abort" button defined with the <a href="qmessagebox.html#ButtonRole-enum">RejectRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Retry</tt></td>
<td class="topAlign"><tt>0x00080000</tt></td>
<td class="topAlign">A "Retry" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Ignore</tt></td>
<td class="topAlign"><tt>0x00100000</tt></td>
<td class="topAlign">An "Ignore" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.NoButton</tt></td>
<td class="topAlign"><tt>0x00000000</tt></td>
<td class="topAlign">An invalid button.</td>
</tr>
</table>
<p>The following values are obsolete:</p>
<table class="valuelist">
<tr class="even" valign="top">
<th class="tblConst">Constant</th>
<th class="tblval">Value</th>
<th class="tbldscr">Description</th>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.YesAll</tt></td>
<td class="topAlign"><tt>YesToAll</tt></td>
<td class="topAlign">Use YesToAll instead.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.NoAll</tt></td>
<td class="topAlign"><tt>NoToAll</tt></td>
<td class="topAlign">Use NoToAll instead.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Default</tt></td>
<td class="topAlign"><tt>0x00000100</tt></td>
<td class="topAlign">Use the <tt>defaultButton</tt> argument of
<a href="qmessagebox.html#information">information</a>(), <a href="qmessagebox.html#warning">warning</a>(), etc. instead, or call
<a href="qmessagebox.html#setDefaultButton">setDefaultButton</a>().</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.Escape</tt></td>
<td class="topAlign"><tt>0x00000200</tt></td>
<td class="topAlign">Call <a href="qmessagebox.html#setEscapeButton">setEscapeButton</a>()
instead.</td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.FlagMask</tt></td>
<td class="topAlign"><tt>0x00000300</tt></td>
<td class="topAlign"> </td>
</tr>
<tr>
<td class="topAlign"><tt>QMessageBox.ButtonMask</tt></td>
<td class="topAlign"><tt>~FlagMask</tt></td>
<td class="topAlign"> </td>
</tr>
</table>
<p>This enum was introduced or modified in Qt 4.2.</p>
<p>The StandardButtons type is a typedef for <a href="qflags.html">QFlags</a><StandardButton>. It stores an OR
combination of StandardButton values.</p>
<p><b>See also</b> <a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a> and <a href="qmessagebox.html#standardButtons-prop">standardButtons</a>.</p>
<hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QMessageBox" />QMessageBox.__init__ (<i>self</i>, <a href="qwidget.html">QWidget</a> <i>parent</i> = None)</h3><p>The <i>parent</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><p>Constructs a message box with no text and no buttons.
<i>parent</i> is passed to the <a href="qdialog.html">QDialog</a>
constructor.</p>
<p>On Mac OS X, if you want your message box to appear as a
<a href="qt.html#WindowType-enum">Qt.Sheet</a> of its
<i>parent</i>, set the message box's <a href="qmessagebox.html#setWindowModality">window modality</a> to
<a href="qt.html#WindowModality-enum">Qt.WindowModal</a> or use
<a href="qmessagebox.html#open">open</a>(). Otherwise, the message
box will be a standard dialog.</p>
<h3 class="fn"><a name="QMessageBox-2" />QMessageBox.__init__ (<i>self</i>, <a href="qmessagebox.html#Icon-enum">Icon</a> <i>icon</i>, QString <i>title</i>, QString <i>text</i>, <a href="qmessagebox-standardbuttons.html">StandardButtons</a> <i>buttons</i> = QMessageBox.NoButton, <a href="qwidget.html">QWidget</a> <i>parent</i> = None, <a href="qt-windowflags.html">Qt.WindowFlags</a> <i>flags</i> = Qt.Dialog|Qt.MSWindowsFixedSizeDialogHint)</h3><p>The <i>parent</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><p>Constructs a message box with the given <i>icon</i>,
<i>title</i>, <i>text</i>, and standard <i>buttons</i>. Standard or
custom buttons can be added at any time using <a href="qmessagebox.html#addButton">addButton</a>(). The <i>parent</i> and
<i>f</i> arguments are passed to the <a href="qdialog.html">QDialog</a> constructor.</p>
<p>The message box is an <a href="qt.html#WindowModality-enum">application modal</a> dialog box.</p>
<p>On Mac OS X, if <i>parent</i> is not 0 and you want your message
box to appear as a <a href="qt.html#WindowType-enum">Qt.Sheet</a>
of that parent, set the message box's <a href="qmessagebox.html#setWindowModality">window modality</a> to
<a href="qt.html#WindowModality-enum">Qt.WindowModal</a>
(default). Otherwise, the message box will be a standard
dialog.</p>
<p><b>See also</b> <a href="qmessagebox.html#setWindowTitle">setWindowTitle</a>(), <a href="qmessagebox.html#text-prop">setText</a>(), <a href="qmessagebox.html#icon-prop">setIcon</a>(), and <a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a>().</p>
<h3 class="fn"><a name="QMessageBox-3" />QMessageBox.__init__ (<i>self</i>, QString <i>title</i>, QString <i>text</i>, <a href="qmessagebox.html#Icon-enum">Icon</a> <i>icon</i>, int <i>button0</i>, int <i>button1</i>, int <i>button2</i>, <a href="qwidget.html">QWidget</a> <i>parent</i> = None, <a href="qt-windowflags.html">Qt.WindowFlags</a> <i>flags</i> = Qt.Dialog|Qt.MSWindowsFixedSizeDialogHint)</h3><p>The <i>parent</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><h3 class="fn"><a name="about" />QMessageBox.about (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>caption</i>, QString <i>text</i>)</h3><p>Displays a simple about box with title <i>title</i> and text
<i>text</i>. The about box's parent is <i>parent</i>.</p>
<p>about() looks for a suitable icon in four locations:</p>
<ol class="1">
<li>It prefers <a href="qwidget.html#windowIcon-prop">parent->icon()</a> if that
exists.</li>
<li>If not, it tries the top-level widget containing
<i>parent</i>.</li>
<li>If that fails, it tries the <a href="qapplication.html#activeWindow">active window.</a></li>
<li>As a last resort it uses the Information icon.</li>
</ol>
<p>The about box has a single button labelled "OK". On Mac OS X,
the about box is popped up as a modeless window; on other
platforms, it is currently application modal.</p>
<p><b>See also</b> <a href="qwidget.html#windowIcon-prop">QWidget.windowIcon</a>() and
<a href="qapplication.html#activeWindow">QApplication.activeWindow</a>().</p>
<h3 class="fn"><a name="aboutQt" />QMessageBox.aboutQt (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i> = '')</h3><p>Displays a simple message box about Qt, with the given
<i>title</i> and centered over <i>parent</i> (if <i>parent</i> is
not 0). The message includes the version number of Qt being used by
the application.</p>
<p>This is useful for inclusion in the <b>Help</b> menu of an
application, as shown in the <a href="mainwindows-menus.html">Menus</a> example.</p>
<p><a href="qapplication.html">QApplication</a> provides this
functionality as a slot.</p>
<p>On Mac OS X, the about box is popped up as a modeless window; on
other platforms, it is currently application modal.</p>
<p><b>See also</b> <a href="qapplication.html#aboutQt">QApplication.aboutQt</a>().</p>
<h3 class="fn"><a name="addButton" />QMessageBox.addButton (<i>self</i>, <a href="qabstractbutton.html">QAbstractButton</a> <i>button</i>, <a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a> <i>role</i>)</h3><p>The <i>button</i> argument has it's ownership transferred to Qt.</p><p>Adds the given <i>button</i> to the message box with the
specified <i>role</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#removeButton">removeButton</a>(), <a href="qmessagebox.html#button">button</a>(), and <a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a>().</p>
<h3 class="fn"><a name="addButton-2" /><a href="qpushbutton.html">QPushButton</a> QMessageBox.addButton (<i>self</i>, QString <i>text</i>, <a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a> <i>role</i>)</h3><p>This is an overloaded function.</p>
<p>Creates a button with the given <i>text</i>, adds it to the
message box for the specified <i>role</i>, and returns it.</p>
<p>This function was introduced in Qt 4.2.</p>
<h3 class="fn"><a name="addButton-3" /><a href="qpushbutton.html">QPushButton</a> QMessageBox.addButton (<i>self</i>, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>button</i>)</h3><p>This is an overloaded function.</p>
<p>Adds a standard <i>button</i> to the message box if it is valid
to do so, and returns the push button.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a>().</p>
<h3 class="fn"><a name="button" /><a href="qabstractbutton.html">QAbstractButton</a> QMessageBox.button (<i>self</i>, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>which</i>)</h3><p>Returns a pointer corresponding to the standard button
<i>which</i>, or 0 if the standard button doesn't exist in this
message box.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#standardButtons-prop">standardButtons</a> and
<a href="qmessagebox.html#standardButton">standardButton</a>().</p>
<h3 class="fn"><a name="buttonRole" /><a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a> QMessageBox.buttonRole (<i>self</i>, <a href="qabstractbutton.html">QAbstractButton</a> <i>button</i>)</h3><p>Returns the button role for the specified <i>button</i>. This
function returns <a href="qmessagebox.html#ButtonRole-enum">InvalidRole</a> if <i>button</i>
is 0 or has not been added to the message box.</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qmessagebox.html#buttons">buttons</a>()
and <a href="qmessagebox.html#addButton">addButton</a>().</p>
<h3 class="fn"><a name="buttons" />unknown-type QMessageBox.buttons (<i>self</i>)</h3><p>Returns a list of all the buttons that have been added to the
message box.</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qmessagebox.html#buttonRole">buttonRole</a>(), <a href="qmessagebox.html#addButton">addButton</a>(), and <a href="qmessagebox.html#removeButton">removeButton</a>().</p>
<h3 class="fn"><a name="buttonText" />QString QMessageBox.buttonText (<i>self</i>, int <i>button</i>)</h3><h3 class="fn"><a name="changeEvent" />QMessageBox.changeEvent (<i>self</i>, <a href="qevent.html">QEvent</a>)</h3><p>Reimplemented from <a href="qwidget.html#changeEvent">QWidget.changeEvent</a>().</p>
<h3 class="fn"><a name="clickedButton" /><a href="qabstractbutton.html">QAbstractButton</a> QMessageBox.clickedButton (<i>self</i>)</h3><p>Returns the button that was clicked by the user, or 0 if the
user hit the <b>Esc</b> key and no <a href="qmessagebox.html#setEscapeButton">escape button</a> was set.</p>
<p>If <a href="qmessagebox.html#exec">exec_</a>() hasn't been called
yet, returns 0.</p>
<p>Example:</p>
<pre class="cpp">
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span> messageBox(<span class="keyword">this</span>);
<span class="type"><a href="qabstractbutton.html">QAbstractButton</a></span> <span class="operator">*</span>disconnectButton <span class="operator">=</span>
messageBox<span class="operator">.</span><a href="qmessagebox.html#addButton">addButton</a>(tr(<span class="string">"Disconnect"</span>)<span class="operator">,</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">.</span>ActionRole);
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
messageBox<span class="operator">.</span><a href="qmessagebox.html#exec">exec_</a>();
<span class="keyword">if</span> (messageBox<span class="operator">.</span>clickedButton() <span class="operator">=</span><span class="operator">=</span> disconnectButton) {
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
}
</pre>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#standardButton">standardButton</a>() and <a href="qmessagebox.html#button">button</a>().</p>
<h3 class="fn"><a name="closeEvent" />QMessageBox.closeEvent (<i>self</i>, <a href="qcloseevent.html">QCloseEvent</a>)</h3><p>Reimplemented from <a href="qwidget.html#closeEvent">QWidget.closeEvent</a>().</p>
<h3 class="fn"><a name="critical" /><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox.critical (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, <a href="qmessagebox-standardbuttons.html">StandardButtons</a> <i>buttons</i> = QMessageBox.Ok, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>defaultButton</i> = QMessageBox.NoButton)</h3><p>Opens a critical message box with the given <i>title</i> and
<i>text</i> in front of the specified <i>parent</i> widget.</p>
<p>The standard <i>buttons</i> are added to the message box.
<i>defaultButton</i> specifies the button used when <b>Enter</b> is
pressed. <i>defaultButton</i> must refer to a button that was given
in <i>buttons</i>. If <i>defaultButton</i> is <a href="qmessagebox.html#StandardButton-enum">QMessageBox.NoButton</a>,
<a href="qmessagebox.html">QMessageBox</a> chooses a suitable
default automatically.</p>
<p>Returns the identity of the standard button that was clicked. If
<b>Esc</b> was pressed instead, the <a href="qmessagebox.html#default-and-escape-keys">escape button</a> is
returned.</p>
<p>The message box is an <a href="qt.html#WindowModality-enum">application modal</a> dialog box.</p>
<p><b>Warning:</b> Do not delete <i>parent</i> during the execution
of the dialog. If you want to do this, you should create the dialog
yourself using one of the <a href="qmessagebox.html">QMessageBox</a> constructors.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#question">question</a>(), <a href="qmessagebox.html#warning">warning</a>(), and <a href="qmessagebox.html#information">information</a>().</p>
<h3 class="fn"><a name="critical-2" />int QMessageBox.critical (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, int <i>button0</i>, int <i>button1</i>, int <i>button2</i> = 0)</h3><h3 class="fn"><a name="critical-3" />int QMessageBox.critical (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, QString <i>button0Text</i>, QString <i>button1Text</i> = '', QString <i>button2Text</i> = '', int <i>defaultButtonNumber</i> = 0, int <i>escapeButtonNumber</i> = -1)</h3><h3 class="fn"><a name="defaultButton" /><a href="qpushbutton.html">QPushButton</a> QMessageBox.defaultButton (<i>self</i>)</h3><p>Returns the button that should be the message box's <a href="qpushbutton.html#default-prop">default button</a>. Returns 0 if no
default button was set.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#setDefaultButton">setDefaultButton</a>(),
<a href="qmessagebox.html#addButton">addButton</a>(), and <a href="qpushbutton.html#default-prop">QPushButton.setDefault</a>().</p>
<h3 class="fn"><a name="detailedText" />QString QMessageBox.detailedText (<i>self</i>)</h3><h3 class="fn"><a name="escapeButton" /><a href="qabstractbutton.html">QAbstractButton</a> QMessageBox.escapeButton (<i>self</i>)</h3><p>Returns the button that is activated when escape is pressed.</p>
<p>By default, <a href="qmessagebox.html">QMessageBox</a> attempts
to automatically detect an escape button as follows:</p>
<ol class="1">
<li>If there is only one button, it is made the escape button.</li>
<li>If there is a <a href="qmessagebox.html#StandardButton-enum">Cancel</a> button, it is
made the escape button.</li>
<li>On Mac OS X only, if there is exactly one button with the role
<a href="qmessagebox.html#ButtonRole-enum">QMessageBox.RejectRole</a>, it
is made the escape button.</li>
</ol>
<p>When an escape button could not be automatically detected,
pressing <b>Esc</b> has no effect.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#setEscapeButton">setEscapeButton</a>() and
<a href="qmessagebox.html#addButton">addButton</a>().</p>
<h3 class="fn"><a name="event" />bool QMessageBox.event (<i>self</i>, <a href="qevent.html">QEvent</a> <i>e</i>)</h3><p>Reimplemented from <a href="qobject.html#event">QObject.event</a>().</p>
<h3 class="fn"><a name="icon" /><a href="qmessagebox.html#Icon-enum">Icon</a> QMessageBox.icon (<i>self</i>)</h3><h3 class="fn"><a name="iconPixmap" /><a href="qpixmap.html">QPixmap</a> QMessageBox.iconPixmap (<i>self</i>)</h3><h3 class="fn"><a name="information" /><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox.information (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, <a href="qmessagebox-standardbuttons.html">StandardButtons</a> <i>buttons</i> = QMessageBox.Ok, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>defaultButton</i> = QMessageBox.NoButton)</h3><p>Opens an information message box with the given <i>title</i> and
<i>text</i> in front of the specified <i>parent</i> widget.</p>
<p>The standard <i>buttons</i> are added to the message box.
<i>defaultButton</i> specifies the button used when <b>Enter</b> is
pressed. <i>defaultButton</i> must refer to a button that was given
in <i>buttons</i>. If <i>defaultButton</i> is <a href="qmessagebox.html#StandardButton-enum">QMessageBox.NoButton</a>,
<a href="qmessagebox.html">QMessageBox</a> chooses a suitable
default automatically.</p>
<p>Returns the identity of the standard button that was clicked. If
<b>Esc</b> was pressed instead, the <a href="qmessagebox.html#default-and-escape-keys">escape button</a> is
returned.</p>
<p>The message box is an <a href="qt.html#WindowModality-enum">application modal</a> dialog box.</p>
<p><b>Warning:</b> Do not delete <i>parent</i> during the execution
of the dialog. If you want to do this, you should create the dialog
yourself using one of the <a href="qmessagebox.html">QMessageBox</a> constructors.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#question">question</a>(), <a href="qmessagebox.html#warning">warning</a>(), and <a href="qmessagebox.html#critical">critical</a>().</p>
<h3 class="fn"><a name="information-2" />int QMessageBox.information (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, int <i>button0</i>, int <i>button1</i> = 0, int <i>button2</i> = 0)</h3><h3 class="fn"><a name="information-3" />int QMessageBox.information (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, QString <i>button0Text</i>, QString <i>button1Text</i> = '', QString <i>button2Text</i> = '', int <i>defaultButtonNumber</i> = 0, int <i>escapeButtonNumber</i> = -1)</h3><h3 class="fn"><a name="informativeText" />QString QMessageBox.informativeText (<i>self</i>)</h3><h3 class="fn"><a name="keyPressEvent" />QMessageBox.keyPressEvent (<i>self</i>, <a href="qkeyevent.html">QKeyEvent</a>)</h3><p>Reimplemented from <a href="qwidget.html#keyPressEvent">QWidget.keyPressEvent</a>().</p>
<h3 class="fn"><a name="open" />QMessageBox.open (<i>self</i>)</h3><p>This is an overloaded function.</p>
<p>Opens the dialog and connects its <a href="qdialog.html#finished">finished</a>() or <a href="qmessagebox.html#buttonClicked">buttonClicked</a>() signal to the
slot specified by <i>receiver</i> and <i>member</i>. If the slot in
<i>member</i> has a pointer for its first parameter the connection
is to <a href="qmessagebox.html#buttonClicked">buttonClicked</a>(),
otherwise the connection is to <a href="qdialog.html#finished">finished</a>().</p>
<p>The signal will be disconnected from the slot when the dialog is
closed.</p>
<h3 class="fn"><a name="open-2" />QMessageBox.open (<i>self</i>, <a href="qobject.html">QObject</a> <i>receiver</i>, object <i>member</i>)</h3><h3 class="fn"><a name="open-3" />QMessageBox.open (<i>self</i>, object <i>slot</i>)</h3><h3 class="fn"><a name="question" /><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox.question (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, <a href="qmessagebox-standardbuttons.html">StandardButtons</a> <i>buttons</i> = QMessageBox.Ok, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>defaultButton</i> = QMessageBox.NoButton)</h3><p>Opens a question message box with the given <i>title</i> and
<i>text</i> in front of the specified <i>parent</i> widget.</p>
<p>The standard <i>buttons</i> are added to the message box.
<i>defaultButton</i> specifies the button used when <b>Enter</b> is
pressed. <i>defaultButton</i> must refer to a button that was given
in <i>buttons</i>. If <i>defaultButton</i> is <a href="qmessagebox.html#StandardButton-enum">QMessageBox.NoButton</a>,
<a href="qmessagebox.html">QMessageBox</a> chooses a suitable
default automatically.</p>
<p>Returns the identity of the standard button that was clicked. If
<b>Esc</b> was pressed instead, the <a href="qmessagebox.html#default-and-escape-keys">escape button</a> is
returned.</p>
<p>The message box is an <a href="qt.html#WindowModality-enum">application modal</a> dialog box.</p>
<p><b>Warning:</b> Do not delete <i>parent</i> during the execution
of the dialog. If you want to do this, you should create the dialog
yourself using one of the <a href="qmessagebox.html">QMessageBox</a> constructors.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#information">information</a>(), <a href="qmessagebox.html#warning">warning</a>(), and <a href="qmessagebox.html#critical">critical</a>().</p>
<h3 class="fn"><a name="question-2" />int QMessageBox.question (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, int <i>button0</i>, int <i>button1</i> = 0, int <i>button2</i> = 0)</h3><h3 class="fn"><a name="question-3" />int QMessageBox.question (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, QString <i>button0Text</i>, QString <i>button1Text</i> = '', QString <i>button2Text</i> = '', int <i>defaultButtonNumber</i> = 0, int <i>escapeButtonNumber</i> = -1)</h3><h3 class="fn"><a name="removeButton" />QMessageBox.removeButton (<i>self</i>, <a href="qabstractbutton.html">QAbstractButton</a> <i>button</i>)</h3><p>The <i>button</i> argument</p><p>Removes <i>button</i> from the button box without deleting
it.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#addButton">addButton</a>() and <a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a>().</p>
<h3 class="fn"><a name="resizeEvent" />QMessageBox.resizeEvent (<i>self</i>, <a href="qresizeevent.html">QResizeEvent</a>)</h3><p>Reimplemented from <a href="qwidget.html#resizeEvent">QWidget.resizeEvent</a>().</p>
<h3 class="fn"><a name="setButtonText" />QMessageBox.setButtonText (<i>self</i>, int <i>button</i>, QString)</h3><h3 class="fn"><a name="setDefaultButton" />QMessageBox.setDefaultButton (<i>self</i>, <a href="qpushbutton.html">QPushButton</a> <i>button</i>)</h3><p>Sets the message box's <a href="qpushbutton.html#default-prop">default button</a> to
<i>button</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#defaultButton">defaultButton</a>(), <a href="qmessagebox.html#addButton">addButton</a>(), and <a href="qpushbutton.html#default-prop">QPushButton.setDefault</a>().</p>
<h3 class="fn"><a name="setDefaultButton-2" />QMessageBox.setDefaultButton (<i>self</i>, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>button</i>)</h3><p>Sets the message box's <a href="qpushbutton.html#default-prop">default button</a> to
<i>button</i>.</p>
<p>This function was introduced in Qt 4.3.</p>
<p><b>See also</b> <a href="qmessagebox.html#addButton">addButton</a>() and <a href="qpushbutton.html#default-prop">QPushButton.setDefault</a>().</p>
<h3 class="fn"><a name="setDetailedText" />QMessageBox.setDetailedText (<i>self</i>, QString <i>text</i>)</h3><h3 class="fn"><a name="setEscapeButton" />QMessageBox.setEscapeButton (<i>self</i>, <a href="qabstractbutton.html">QAbstractButton</a> <i>button</i>)</h3><p>Sets the button that gets activated when the <b>Escape</b> key
is pressed to <i>button</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#escapeButton">escapeButton</a>(), <a href="qmessagebox.html#addButton">addButton</a>(), and <a href="qmessagebox.html#clickedButton">clickedButton</a>().</p>
<h3 class="fn"><a name="setEscapeButton-2" />QMessageBox.setEscapeButton (<i>self</i>, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>button</i>)</h3><p>Sets the buttons that gets activated when the <b>Escape</b> key
is pressed to <i>button</i>.</p>
<p>This function was introduced in Qt 4.3.</p>
<p><b>See also</b> <a href="qmessagebox.html#addButton">addButton</a>() and <a href="qmessagebox.html#clickedButton">clickedButton</a>().</p>
<h3 class="fn"><a name="setIcon" />QMessageBox.setIcon (<i>self</i>, <a href="qmessagebox.html#Icon-enum">Icon</a>)</h3><h3 class="fn"><a name="setIconPixmap" />QMessageBox.setIconPixmap (<i>self</i>, <a href="qpixmap.html">QPixmap</a>)</h3><h3 class="fn"><a name="setInformativeText" />QMessageBox.setInformativeText (<i>self</i>, QString <i>text</i>)</h3><h3 class="fn"><a name="setStandardButtons" />QMessageBox.setStandardButtons (<i>self</i>, <a href="qmessagebox-standardbuttons.html">StandardButtons</a> <i>buttons</i>)</h3><h3 class="fn"><a name="setText" />QMessageBox.setText (<i>self</i>, QString)</h3><h3 class="fn"><a name="setTextFormat" />QMessageBox.setTextFormat (<i>self</i>, <a href="qt.html#TextFormat-enum">Qt.TextFormat</a>)</h3><h3 class="fn"><a name="setWindowModality" />QMessageBox.setWindowModality (<i>self</i>, <a href="qt.html#WindowModality-enum">Qt.WindowModality</a> <i>windowModality</i>)</h3><p>This function shadows <a href="qwidget.html#windowModality-prop">QWidget.setWindowModality</a>().</p>
<p>Sets the modality of the message box to
<i>windowModality</i>.</p>
<p>On Mac OS X, if the modality is set to <a href="qt.html#WindowModality-enum">Qt.WindowModal</a> and the message
box has a parent, then the message box will be a <a href="qt.html#WindowType-enum">Qt.Sheet</a>, otherwise the message box
will be a standard dialog.</p>
<p>This function was introduced in Qt 4.2.</p>
<h3 class="fn"><a name="setWindowTitle" />QMessageBox.setWindowTitle (<i>self</i>, QString <i>title</i>)</h3><p>This function shadows <a href="qwidget.html#windowTitle-prop">QWidget.setWindowTitle</a>().</p>
<p>Sets the title of the message box to <i>title</i>. On Mac OS X,
the window title is ignored (as required by the Mac OS X
Guidelines).</p>
<p>This function was introduced in Qt 4.2.</p>
<h3 class="fn"><a name="showEvent" />QMessageBox.showEvent (<i>self</i>, <a href="qshowevent.html">QShowEvent</a>)</h3><p>Reimplemented from <a href="qwidget.html#showEvent">QWidget.showEvent</a>().</p>
<h3 class="fn"><a name="sizeHint" /><a href="qsize.html">QSize</a> QMessageBox.sizeHint (<i>self</i>)</h3><h3 class="fn"><a name="standardButton" /><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox.standardButton (<i>self</i>, <a href="qabstractbutton.html">QAbstractButton</a> <i>button</i>)</h3><p>Returns the standard button enum value corresponding to the
given <i>button</i>, or <a href="qmessagebox.html#StandardButton-enum">NoButton</a> if the given
<i>button</i> isn't a standard button.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#button">button</a>()
and <a href="qmessagebox.html#standardButtons-prop">standardButtons</a>().</p>
<h3 class="fn"><a name="standardButtons" /><a href="qmessagebox-standardbuttons.html">StandardButtons</a> QMessageBox.standardButtons (<i>self</i>)</h3><h3 class="fn"><a name="standardIcon" /><a href="qpixmap.html">QPixmap</a> QMessageBox.standardIcon (<a href="qmessagebox.html#Icon-enum">Icon</a> <i>icon</i>)</h3><h3 class="fn"><a name="text" />QString QMessageBox.text (<i>self</i>)</h3><h3 class="fn"><a name="textFormat" /><a href="qt.html#TextFormat-enum">Qt.TextFormat</a> QMessageBox.textFormat (<i>self</i>)</h3><h3 class="fn"><a name="warning" /><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox.warning (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, <a href="qmessagebox-standardbuttons.html">StandardButtons</a> <i>buttons</i> = QMessageBox.Ok, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>defaultButton</i> = QMessageBox.NoButton)</h3><p>Opens a warning message box with the given <i>title</i> and
<i>text</i> in front of the specified <i>parent</i> widget.</p>
<p>The standard <i>buttons</i> are added to the message box.
<i>defaultButton</i> specifies the button used when <b>Enter</b> is
pressed. <i>defaultButton</i> must refer to a button that was given
in <i>buttons</i>. If <i>defaultButton</i> is <a href="qmessagebox.html#StandardButton-enum">QMessageBox.NoButton</a>,
<a href="qmessagebox.html">QMessageBox</a> chooses a suitable
default automatically.</p>
<p>Returns the identity of the standard button that was clicked. If
<b>Esc</b> was pressed instead, the <a href="qmessagebox.html#default-and-escape-keys">escape button</a> is
returned.</p>
<p>The message box is an <a href="qt.html#WindowModality-enum">application modal</a> dialog box.</p>
<p><b>Warning:</b> Do not delete <i>parent</i> during the execution
of the dialog. If you want to do this, you should create the dialog
yourself using one of the <a href="qmessagebox.html">QMessageBox</a> constructors.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qmessagebox.html#question">question</a>(), <a href="qmessagebox.html#information">information</a>(), and <a href="qmessagebox.html#critical">critical</a>().</p>
<h3 class="fn"><a name="warning-2" />int QMessageBox.warning (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, int <i>button0</i>, int <i>button1</i>, int <i>button2</i> = 0)</h3><h3 class="fn"><a name="warning-3" />int QMessageBox.warning (<a href="qwidget.html">QWidget</a> <i>parent</i>, QString <i>title</i>, QString <i>text</i>, QString <i>button0Text</i>, QString <i>button1Text</i> = '', QString <i>button2Text</i> = '', int <i>defaultButtonNumber</i> = 0, int <i>escapeButtonNumber</i> = -1)</h3><hr /><h2>Qt Signal Documentation</h2><h3 class="fn"><a name="buttonClicked" />void buttonClicked ( ::QAbstractButton*)</h3><p>This is the default overload of this signal.</p><p>This signal is emitted whenever a button is clicked inside the
<a href="qmessagebox.html">QMessageBox</a>. The button that was
clicked in returned in <i>button</i>.</p>
<address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td align="left" width="25%">PyQt 4.12.1 for X11</td><td align="center" width="50%">Copyright © <a href="http://www.riverbankcomputing.com">Riverbank Computing Ltd</a> and <a href="http://www.qt.io">The Qt Company</a> 2015</td><td align="right" width="25%">Qt 4.8.7</td></tr></table></div></address></body></html>
|
