qerrormessage.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2015 The Qt Company Ltd.-
4** Contact: http://www.qt.io/licensing/-
5**-
6** This file is part of the QtWidgets module of the Qt Toolkit.-
7**-
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9** Commercial License Usage-
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16**-
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18** Alternatively, this file may be used under the terms of the GNU Lesser-
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28** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.-
29**-
30** $QT_END_LICENSE$-
31**-
32****************************************************************************/-
33-
34#include "qerrormessage.h"-
35-
36#ifndef QT_NO_ERRORMESSAGE-
37-
38#include "qapplication.h"-
39#include "qcheckbox.h"-
40#include "qlabel.h"-
41#include "qlayout.h"-
42#include "qmessagebox.h"-
43#include "qpushbutton.h"-
44#include "qstringlist.h"-
45#include "qtextedit.h"-
46#include "qdialog_p.h"-
47#include "qpixmap.h"-
48#include "qmetaobject.h"-
49#include "qthread.h"-
50#include "qset.h"-
51-
52#include <queue>-
53-
54#include <stdio.h>-
55#include <stdlib.h>-
56-
57#ifdef Q_OS_WINCE-
58extern bool qt_wince_is_mobile(); //defined in qguifunctions_wince.cpp-
59extern bool qt_wince_is_high_dpi(); //defined in qguifunctions_wince.cpp-
60#endif-
61-
62QT_BEGIN_NAMESPACE-
63-
64class QErrorMessagePrivate : public QDialogPrivate-
65{-
66 Q_DECLARE_PUBLIC(QErrorMessage)-
67public:-
68 QPushButton * ok;-
69 QCheckBox * again;-
70 QTextEdit * errors;-
71 QLabel * icon;-
72 std::queue<QPair<QString, QString> > pending;-
73 QSet<QString> doNotShow;-
74 QSet<QString> doNotShowType;-
75 QString currentMessage;-
76 QString currentType;-
77-
78 bool isMessageToBeShown(const QString &message, const QString &type) const;-
79 bool nextPending();-
80 void retranslateStrings();-
81};-
82-
83namespace {-
84class QErrorMessageTextView : public QTextEdit-
85{-
86public:-
87 QErrorMessageTextView(QWidget *parent)-
88 : QTextEdit(parent) { setReadOnly(true); }
never executed: end of block
0
89-
90 virtual QSize minimumSizeHint() const Q_DECL_OVERRIDE;-
91 virtual QSize sizeHint() const Q_DECL_OVERRIDE;-
92};-
93} // unnamed namespace-
94-
95QSize QErrorMessageTextView::minimumSizeHint() const-
96{-
97#ifdef Q_OS_WINCE-
98 if (qt_wince_is_mobile())-
99 if (qt_wince_is_high_dpi())-
100 return QSize(200, 200);-
101 else-
102 return QSize(100, 100);-
103 else-
104 return QSize(70, 70);-
105#else-
106 return QSize(50, 50);
never executed: return QSize(50, 50);
0
107#endif-
108}-
109-
110QSize QErrorMessageTextView::sizeHint() const-
111{-
112#ifdef Q_OS_WINCE-
113 if (qt_wince_is_mobile())-
114 if (qt_wince_is_high_dpi())-
115 return QSize(400, 200);-
116 else-
117 return QSize(320, 120);-
118 else-
119 return QSize(300, 100);-
120#else-
121 return QSize(250, 75);
never executed: return QSize(250, 75);
0
122#endif //Q_OS_WINCE-
123}-
124-
125/*!-
126 \class QErrorMessage-
127-
128 \brief The QErrorMessage class provides an error message display dialog.-
129-
130 \ingroup standard-dialog-
131 \inmodule QtWidgets-
132-
133 An error message widget consists of a text label and a checkbox. The-
134 checkbox lets the user control whether the same error message will be-
135 displayed again in the future, typically displaying the text,-
136 "Show this message again" translated into the appropriate local-
137 language.-
138-
139 For production applications, the class can be used to display messages which-
140 the user only needs to see once. To use QErrorMessage like this, you create-
141 the dialog in the usual way, and show it by calling the showMessage() slot or-
142 connecting signals to it.-
143-
144 The static qtHandler() function installs a message handler-
145 using qInstallMessageHandler() and creates a QErrorMessage that displays-
146 qDebug(), qWarning() and qFatal() messages. This is most useful in-
147 environments where no console is available to display warnings and-
148 error messages.-
149-
150 In both cases QErrorMessage will queue pending messages and display-
151 them in order, with each new message being shown as soon as the user-
152 has accepted the previous message. Once the user has specified that a-
153 message is not to be shown again it is automatically skipped, and the-
154 dialog will show the next appropriate message in the queue.-
155-
156 The \l{dialogs/standarddialogs}{Standard Dialogs} example shows-
157 how to use QErrorMessage as well as other built-in Qt dialogs.-
158-
159 \image qerrormessage.png-
160-
161 \sa QMessageBox, QStatusBar::showMessage(), {Standard Dialogs Example}-
162*/-
163-
164static QErrorMessage * qtMessageHandler = 0;-
165-
166static void deleteStaticcQErrorMessage() // post-routine-
167{-
168 if (qtMessageHandler) {
qtMessageHandlerDescription
TRUEnever evaluated
FALSEnever evaluated
0
169 delete qtMessageHandler;-
170 qtMessageHandler = 0;-
171 }
never executed: end of block
0
172}
never executed: end of block
0
173-
174static bool metFatal = false;-
175-
176static void jump(QtMsgType t, const QMessageLogContext & /*context*/, const QString &m)-
177{-
178 if (!qtMessageHandler)
!qtMessageHandlerDescription
TRUEnever evaluated
FALSEnever evaluated
0
179 return;
never executed: return;
0
180-
181 QString rich;-
182-
183 switch (t) {-
184 case QtDebugMsg:
never executed: case QtDebugMsg:
0
185 default:
never executed: default:
0
186 rich = QErrorMessage::tr("Debug Message:");-
187 break;
never executed: break;
0
188 case QtWarningMsg:
never executed: case QtWarningMsg:
0
189 rich = QErrorMessage::tr("Warning:");-
190 break;
never executed: break;
0
191 case QtFatalMsg:
never executed: case QtFatalMsg:
0
192 rich = QErrorMessage::tr("Fatal Error:");-
193 }
never executed: end of block
0
194 rich = QString::fromLatin1("<p><b>%1</b></p>").arg(rich);-
195 rich += Qt::convertFromPlainText(m, Qt::WhiteSpaceNormal);-
196-
197 // ### work around text engine quirk-
198 if (rich.endsWith(QLatin1String("</p>")))
rich.endsWith(...tring("</p>"))Description
TRUEnever evaluated
FALSEnever evaluated
0
199 rich.chop(4);
never executed: rich.chop(4);
0
200-
201 if (!metFatal) {
!metFatalDescription
TRUEnever evaluated
FALSEnever evaluated
0
202 if (QThread::currentThread() == qApp->thread()) {
QThread::curre...()))->thread()Description
TRUEnever evaluated
FALSEnever evaluated
0
203 qtMessageHandler->showMessage(rich);-
204 } else {
never executed: end of block
0
205 QMetaObject::invokeMethod(qtMessageHandler,-
206 "showMessage",-
207 Qt::QueuedConnection,-
208 Q_ARG(QString, rich));-
209 }
never executed: end of block
0
210 metFatal = (t == QtFatalMsg);-
211 }
never executed: end of block
0
212}
never executed: end of block
0
213-
214-
215/*!-
216 Constructs and installs an error handler window with the given \a-
217 parent.-
218*/-
219-
220QErrorMessage::QErrorMessage(QWidget * parent)-
221 : QDialog(*new QErrorMessagePrivate, parent)-
222{-
223 Q_D(QErrorMessage);-
224-
225 d->icon = new QLabel(this);-
226 d->errors = new QErrorMessageTextView(this);-
227 d->again = new QCheckBox(this);-
228 d->ok = new QPushButton(this);-
229 QGridLayout * grid = new QGridLayout(this);-
230-
231 connect(d->ok, SIGNAL(clicked()), this, SLOT(accept()));-
232-
233 grid->addWidget(d->icon, 0, 0, Qt::AlignTop);-
234 grid->addWidget(d->errors, 0, 1);-
235 grid->addWidget(d->again, 1, 1, Qt::AlignTop);-
236 grid->addWidget(d->ok, 2, 0, 1, 2, Qt::AlignCenter);-
237 grid->setColumnStretch(1, 42);-
238 grid->setRowStretch(0, 42);-
239-
240#ifndef QT_NO_MESSAGEBOX-
241 d->icon->setPixmap(QMessageBox::standardIcon(QMessageBox::Information));-
242 d->icon->setAlignment(Qt::AlignHCenter | Qt::AlignTop);-
243#endif-
244 d->again->setChecked(true);-
245#if defined(Q_OS_WINCE)-
246 d->ok->setFixedSize(0,0);-
247#endif-
248 d->ok->setFocus();-
249-
250 d->retranslateStrings();-
251}
never executed: end of block
0
252-
253-
254/*!-
255 Destroys the error message dialog.-
256*/-
257-
258QErrorMessage::~QErrorMessage()-
259{-
260 if (this == qtMessageHandler) {
this == qtMessageHandlerDescription
TRUEnever evaluated
FALSEnever evaluated
0
261 qtMessageHandler = 0;-
262 QtMessageHandler tmp = qInstallMessageHandler(0);-
263 // in case someone else has later stuck in another...-
264 if (tmp != jump)
tmp != jumpDescription
TRUEnever evaluated
FALSEnever evaluated
0
265 qInstallMessageHandler(tmp);
never executed: qInstallMessageHandler(tmp);
0
266 }
never executed: end of block
0
267}
never executed: end of block
0
268-
269-
270/*! \reimp */-
271-
272void QErrorMessage::done(int a)-
273{-
274 Q_D(QErrorMessage);-
275 if (!d->again->isChecked()) {
!d->again->isChecked()Description
TRUEnever evaluated
FALSEnever evaluated
0
276 if (d->currentType.isEmpty()) {
d->currentType.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
277 if (!d->currentMessage.isEmpty())
!d->currentMessage.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
278 d->doNotShow.insert(d->currentMessage);
never executed: d->doNotShow.insert(d->currentMessage);
0
279 } else {
never executed: end of block
0
280 d->doNotShowType.insert(d->currentType);-
281 }
never executed: end of block
0
282 }-
283 d->currentMessage.clear();-
284 d->currentType.clear();-
285 if (!d->nextPending()) {
!d->nextPending()Description
TRUEnever evaluated
FALSEnever evaluated
0
286 QDialog::done(a);-
287 if (this == qtMessageHandler && metFatal)
this == qtMessageHandlerDescription
TRUEnever evaluated
FALSEnever evaluated
metFatalDescription
TRUEnever evaluated
FALSEnever evaluated
0
288 exit(1);
never executed: exit(1);
0
289 }
never executed: end of block
0
290}
never executed: end of block
0
291-
292-
293/*!-
294 Returns a pointer to a QErrorMessage object that outputs the-
295 default Qt messages. This function creates such an object, if there-
296 isn't one already.-
297*/-
298-
299QErrorMessage * QErrorMessage::qtHandler()-
300{-
301 if (!qtMessageHandler) {
!qtMessageHandlerDescription
TRUEnever evaluated
FALSEnever evaluated
0
302 qtMessageHandler = new QErrorMessage(0);-
303 qAddPostRoutine(deleteStaticcQErrorMessage); // clean up-
304 qtMessageHandler->setWindowTitle(QApplication::applicationName());-
305 qInstallMessageHandler(jump);-
306 }
never executed: end of block
0
307 return qtMessageHandler;
never executed: return qtMessageHandler;
0
308}-
309-
310-
311/*! \internal */-
312-
313bool QErrorMessagePrivate::isMessageToBeShown(const QString &message, const QString &type) const-
314{-
315 return !message.isEmpty()
never executed: return !message.isEmpty() && (type.isEmpty() ? !doNotShow.contains(message) : !doNotShowType.contains(type));
!message.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
316 && (type.isEmpty() ? !doNotShow.contains(message) : !doNotShowType.contains(type));
never executed: return !message.isEmpty() && (type.isEmpty() ? !doNotShow.contains(message) : !doNotShowType.contains(type));
type.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
(type.isEmpty(...ontains(type))Description
TRUEnever evaluated
FALSEnever evaluated
0
317}-
318-
319bool QErrorMessagePrivate::nextPending()-
320{-
321 while (!pending.empty()) {
!pending.empty()Description
TRUEnever evaluated
FALSEnever evaluated
0
322 QPair<QString,QString> &pendingMessage = pending.front();-
323 QString message = qMove(pendingMessage.first);-
324 QString type = qMove(pendingMessage.second);-
325 pending.pop();-
326 if (isMessageToBeShown(message, type)) {
isMessageToBeS...message, type)Description
TRUEnever evaluated
FALSEnever evaluated
0
327#ifndef QT_NO_TEXTHTMLPARSER-
328 errors->setHtml(message);-
329#else-
330 errors->setPlainText(message);-
331#endif-
332 currentMessage = qMove(message);-
333 currentType = qMove(type);-
334 return true;
never executed: return true;
0
335 }-
336 }
never executed: end of block
0
337 return false;
never executed: return false;
0
338}-
339-
340-
341/*!-
342 Shows the given message, \a message, and returns immediately. If the user-
343 has requested for the message not to be shown again, this function does-
344 nothing.-
345-
346 Normally, the message is displayed immediately. However, if there are-
347 pending messages, it will be queued to be displayed later.-
348*/-
349-
350void QErrorMessage::showMessage(const QString &message)-
351{-
352 showMessage(message, QString());-
353}
never executed: end of block
0
354-
355/*!-
356 \since 4.5-
357 \overload-
358-
359 Shows the given message, \a message, and returns immediately. If the user-
360 has requested for messages of type, \a type, not to be shown again, this-
361 function does nothing.-
362-
363 Normally, the message is displayed immediately. However, if there are-
364 pending messages, it will be queued to be displayed later.-
365-
366 \sa showMessage()-
367*/-
368-
369void QErrorMessage::showMessage(const QString &message, const QString &type)-
370{-
371 Q_D(QErrorMessage);-
372 if (!d->isMessageToBeShown(message, type))
!d->isMessageT...message, type)Description
TRUEnever evaluated
FALSEnever evaluated
0
373 return;
never executed: return;
0
374 d->pending.push(qMakePair(message, type));-
375 if (!isVisible() && d->nextPending())
!isVisible()Description
TRUEnever evaluated
FALSEnever evaluated
d->nextPending()Description
TRUEnever evaluated
FALSEnever evaluated
0
376 show();
never executed: show();
0
377}
never executed: end of block
0
378-
379/*!-
380 \reimp-
381*/-
382void QErrorMessage::changeEvent(QEvent *e)-
383{-
384 Q_D(QErrorMessage);-
385 if (e->type() == QEvent::LanguageChange) {
e->type() == Q...LanguageChangeDescription
TRUEnever evaluated
FALSEnever evaluated
0
386 d->retranslateStrings();-
387 }
never executed: end of block
0
388 QDialog::changeEvent(e);-
389}
never executed: end of block
0
390-
391void QErrorMessagePrivate::retranslateStrings()-
392{-
393 again->setText(QErrorMessage::tr("&Show this message again"));-
394 ok->setText(QErrorMessage::tr("&OK"));-
395}
never executed: end of block
0
396-
397QT_END_NAMESPACE-
398-
399#include "moc_qerrormessage.cpp"-
400-
401#endif // QT_NO_ERRORMESSAGE-
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