qerrormessage.cpp

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1 /**************************************************************************** -

2 ** -

4 ** Contact: https://www.qt.io/licensing/ -

5 ** -

6 ** This file is part of the QtWidgets module of the Qt Toolkit. -

7 ** -

8 ** $QT_BEGIN_LICENSE:LGPL$ -

9 ** Commercial License Usage -

10 ** Licensees holding valid commercial Qt licenses may use this file in -

11 ** accordance with the commercial license agreement provided with the -

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15 ** information use the contact form at https://www.qt.io/contact-us. -

16 ** -

17 ** GNU Lesser General Public License Usage -

18 ** Alternatively, this file may be used under the terms of the GNU Lesser -

19 ** General Public License version 3 as published by the Free Software -

20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the -

21 ** packaging of this file. Please review the following information to -

22 ** ensure the GNU Lesser General Public License version 3 requirements -

23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -

24 ** -

25 ** GNU General Public License Usage -

26 ** Alternatively, this file may be used under the terms of the GNU -

27 ** General Public License version 2.0 or (at your option) the GNU General -

28 ** Public license version 3 or any later version approved by the KDE Free -

29 ** Qt Foundation. The licenses are as published by the Free Software -

30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -

31 ** included in the packaging of this file. Please review the following -

32 ** information to ensure the GNU General Public License requirements will -

33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and -

34 ** https://www.gnu.org/licenses/gpl-3.0.html. -

35 ** -

36 ** $QT_END_LICENSE$ -

37 ** -

38 ****************************************************************************/ -

39 -

40 #include "qerrormessage.h" -

41 -

42 #ifndef QT_NO_ERRORMESSAGE -

43 -

44 #include "qapplication.h" -

45 #include "qcheckbox.h" -

46 #include "qlabel.h" -

47 #include "qlayout.h" -

48 #include "qmessagebox.h" -

49 #include "qpushbutton.h" -

50 #include "qstringlist.h" -

51 #include "qtextedit.h" -

52 #include "qdialog_p.h" -

53 #include "qpixmap.h" -

54 #include "qmetaobject.h" -

55 #include "qthread.h" -

56 #include "qset.h" -

57 -

58 #include <queue> -

59 -

60 #include <stdio.h> -

61 #include <stdlib.h> -

62 -

63 #ifdef Q_OS_WINCE -

64 extern bool qt_wince_is_mobile(); //defined in qguifunctions_wince.cpp -

65 extern bool qt_wince_is_high_dpi(); //defined in qguifunctions_wince.cpp -

66 #endif -

67 -

68 QT_BEGIN_NAMESPACE -

69 -

70 class QErrorMessagePrivate : public QDialogPrivate -

71 { -

72 Q_DECLARE_PUBLIC(QErrorMessage) -

73 public: -

74 QPushButton * ok; -

75 QCheckBox * again; -

76 QTextEdit * errors; -

77 QLabel * icon; -

78 std::queue<QPair<QString, QString> > pending; -

79 QSet<QString> doNotShow; -

80 QSet<QString> doNotShowType; -

81 QString currentMessage; -

82 QString currentType; -

83 -

84 bool isMessageToBeShown(const QString &message, const QString &type) const; -

85 bool nextPending(); -

86 void retranslateStrings(); -

87 }; -

88 -

89 namespace { -

90 class QErrorMessageTextView : public QTextEdit -

91 { -

92 public: -

93 QErrorMessageTextView(QWidget *parent) -

: QTextEdit(parent) { setReadOnly(true); }

never executed: end of block

95 -

96 virtual QSize minimumSizeHint() const Q_DECL_OVERRIDE; -

97 virtual QSize sizeHint() const Q_DECL_OVERRIDE; -

98 }; -

99 } // unnamed namespace -

100 -

101 QSize QErrorMessageTextView::minimumSizeHint() const -

102 { -

103 #ifdef Q_OS_WINCE -

104 if (qt_wince_is_mobile()) -

105 if (qt_wince_is_high_dpi()) -

106 return QSize(200, 200); -

107 else -

108 return QSize(100, 100); -

109 else -

110 return QSize(70, 70); -

111 #else -

112

return QSize(50, 50);

never executed: return QSize(50, 50);

113 #endif -

114 } -

115 -

116 QSize QErrorMessageTextView::sizeHint() const -

117 { -

118 #ifdef Q_OS_WINCE -

119 if (qt_wince_is_mobile()) -

120 if (qt_wince_is_high_dpi()) -

121 return QSize(400, 200); -

122 else -

123 return QSize(320, 120); -

124 else -

125 return QSize(300, 100); -

126 #else -

127

return QSize(250, 75);

never executed: return QSize(250, 75);

128 #endif //Q_OS_WINCE -

129 } -

130 -

131 /*! -

132 \class QErrorMessage -

133 -

134 \brief The QErrorMessage class provides an error message display dialog. -

135 -

136 \ingroup standard-dialog -

137 \inmodule QtWidgets -

138 -

139 An error message widget consists of a text label and a checkbox. The -

140 checkbox lets the user control whether the same error message will be -

141 displayed again in the future, typically displaying the text, -

142 "Show this message again" translated into the appropriate local -

143 language. -

144 -

145 For production applications, the class can be used to display messages which -

146 the user only needs to see once. To use QErrorMessage like this, you create -

147 the dialog in the usual way, and show it by calling the showMessage() slot or -

148 connecting signals to it. -

149 -

150 The static qtHandler() function installs a message handler -

151 using qInstallMessageHandler() and creates a QErrorMessage that displays -

152 qDebug(), qWarning() and qFatal() messages. This is most useful in -

153 environments where no console is available to display warnings and -

154 error messages. -

155 -

156 In both cases QErrorMessage will queue pending messages and display -

157 them in order, with each new message being shown as soon as the user -

158 has accepted the previous message. Once the user has specified that a -

159 message is not to be shown again it is automatically skipped, and the -

160 dialog will show the next appropriate message in the queue. -

161 -

162 The \l{dialogs/standarddialogs}{Standard Dialogs} example shows -

163 how to use QErrorMessage as well as other built-in Qt dialogs. -

164 -

165 \image qerrormessage.png -

166 -

167 \sa QMessageBox, QStatusBar::showMessage(), {Standard Dialogs Example} -

168 */ -

169 -

170 static QErrorMessage * qtMessageHandler = 0; -

171 -

172 static void deleteStaticcQErrorMessage() // post-routine -

173 { -

174

if (qtMessageHandler) {

qtMessageHandler	Description
TRUE	never evaluated
FALSE	never evaluated

175 delete qtMessageHandler; -

176 qtMessageHandler = 0; -

177

}

never executed: end of block

178

}

never executed: end of block

179 -

180 static bool metFatal = false; -

181 -

182 static void jump(QtMsgType t, const QMessageLogContext & /*context*/, const QString &m) -

183 { -

184

if (!qtMessageHandler)

!qtMessageHandler	Description
TRUE	never evaluated
FALSE	never evaluated

185

return;

never executed: return;

186 -

187 QString rich; -

188 -

189 switch (t) { -

190

case QtDebugMsg:

never executed: case QtDebugMsg:

191

default:

never executed: default:

192 rich = QErrorMessage::tr("Debug Message:"); -

193

break;

never executed: break;

194

case QtWarningMsg:

never executed: case QtWarningMsg:

195 rich = QErrorMessage::tr("Warning:"); -

196

break;

never executed: break;

197

case QtFatalMsg:

never executed: case QtFatalMsg:

198 rich = QErrorMessage::tr("Fatal Error:"); -

199

}

never executed: end of block

200 rich = QString::fromLatin1("%1").arg(rich); -

201 rich += Qt::convertFromPlainText(m, Qt::WhiteSpaceNormal); -

202 -

203 // ### work around text engine quirk -

204

if (rich.endsWith(QLatin1String("")))

rich.endsWith(...tring("</p>"))	Description
TRUE	never evaluated
FALSE	never evaluated

205

rich.chop(4);

never executed: rich.chop(4);

206 -

207

if (!metFatal) {

!metFatal	Description
TRUE	never evaluated
FALSE	never evaluated

208

if (QThread::currentThread() == qApp->thread()) {

QThread::curre...()))->thread()	Description
TRUE	never evaluated
FALSE	never evaluated

209 qtMessageHandler->showMessage(rich); -

210

} else {

never executed: end of block

211 QMetaObject::invokeMethod(qtMessageHandler, -

212 "showMessage", -

213 Qt::QueuedConnection, -

214 Q_ARG(QString, rich)); -

215

}

never executed: end of block

216 metFatal = (t == QtFatalMsg); -

217

}

never executed: end of block

218

}

never executed: end of block

219 -

220 -

221 /*! -

222 Constructs and installs an error handler window with the given \a -

223 parent. -

224 */ -

225 -

226 QErrorMessage::QErrorMessage(QWidget * parent) -

227 : QDialog(*new QErrorMessagePrivate, parent) -

228 { -

229 Q_D(QErrorMessage); -

230 -

231 d->icon = new QLabel(this); -

232 d->errors = new QErrorMessageTextView(this); -

233 d->again = new QCheckBox(this); -

234 d->ok = new QPushButton(this); -

235 QGridLayout * grid = new QGridLayout(this); -

236 -

237 connect(d->ok, SIGNAL(clicked()), this, SLOT(accept())); -

238 -

239 grid->addWidget(d->icon, 0, 0, Qt::AlignTop); -

240 grid->addWidget(d->errors, 0, 1); -

241 grid->addWidget(d->again, 1, 1, Qt::AlignTop); -

242 grid->addWidget(d->ok, 2, 0, 1, 2, Qt::AlignCenter); -

243 grid->setColumnStretch(1, 42); -

244 grid->setRowStretch(0, 42); -

245 -

246 #ifndef QT_NO_MESSAGEBOX -

247 d->icon->setPixmap(QMessageBox::standardIcon(QMessageBox::Information)); -

248 d->icon->setAlignment(Qt::AlignHCenter | Qt::AlignTop); -

249 #endif -

250 d->again->setChecked(true); -

251 #if defined(Q_OS_WINCE) -

252 d->ok->setFixedSize(0,0); -

253 #endif -

254 d->ok->setFocus(); -

255 -

256 d->retranslateStrings(); -

257

}

never executed: end of block

258 -

259 -

260 /*! -

261 Destroys the error message dialog. -

262 */ -

263 -

264 QErrorMessage::~QErrorMessage() -

265 { -

266

if (this == qtMessageHandler) {

this == qtMessageHandler	Description
TRUE	never evaluated
FALSE	never evaluated

267 qtMessageHandler = 0; -

268 QtMessageHandler tmp = qInstallMessageHandler(0); -

269 // in case someone else has later stuck in another... -

270

if (tmp != jump)

tmp != jump	Description
TRUE	never evaluated
FALSE	never evaluated

271

qInstallMessageHandler(tmp);

never executed: qInstallMessageHandler(tmp);

272

}

never executed: end of block

273

}

never executed: end of block

274 -

275 -

276 /*! \reimp */ -

277 -

278 void QErrorMessage::done(int a) -

279 { -

280 Q_D(QErrorMessage); -

281

if (!d->again->isChecked()) {

!d->again->isChecked()	Description
TRUE	never evaluated
FALSE	never evaluated

282

if (d->currentType.isEmpty()) {

d->currentType.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

283

if (!d->currentMessage.isEmpty())

!d->currentMessage.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

284

d->doNotShow.insert(d->currentMessage);

never executed: d->doNotShow.insert(d->currentMessage);

285

} else {

never executed: end of block

286 d->doNotShowType.insert(d->currentType); -

287

}

never executed: end of block

288 } -

289 d->currentMessage.clear(); -

290 d->currentType.clear(); -

291

if (!d->nextPending()) {

!d->nextPending()	Description
TRUE	never evaluated
FALSE	never evaluated

292 QDialog::done(a); -

293

if (this == qtMessageHandler && metFatal)

this == qtMessageHandler	Description
TRUE	never evaluated
FALSE	never evaluated

metFatal	Description
TRUE	never evaluated
FALSE	never evaluated

294

exit(1);

never executed: exit(1);

295

}

never executed: end of block

296

}

never executed: end of block

297 -

298 -

299 /*! -

300 Returns a pointer to a QErrorMessage object that outputs the -

301 default Qt messages. This function creates such an object, if there -

302 isn't one already. -

303 */ -

304 -

305 QErrorMessage * QErrorMessage::qtHandler() -

306 { -

307

if (!qtMessageHandler) {

!qtMessageHandler	Description
TRUE	never evaluated
FALSE	never evaluated

308 qtMessageHandler = new QErrorMessage(0); -

309 qAddPostRoutine(deleteStaticcQErrorMessage); // clean up -

310 qtMessageHandler->setWindowTitle(QApplication::applicationName()); -

311 qInstallMessageHandler(jump); -

312

}

never executed: end of block

313

return qtMessageHandler;

never executed: return qtMessageHandler;

314 } -

315 -

316 -

317 /*! \internal */ -

318 -

319 bool QErrorMessagePrivate::isMessageToBeShown(const QString &message, const QString &type) const -

320 { -

321

return !message.isEmpty()

never executed: return !message.isEmpty() && (type.isEmpty() ? !doNotShow.contains(message) : !doNotShowType.contains(type));

322

&& (type.isEmpty() ? !doNotShow.contains(message) : !doNotShowType.contains(type));

never executed: return !message.isEmpty() && (type.isEmpty() ? !doNotShow.contains(message) : !doNotShowType.contains(type));

323 } -

324 -

325 bool QErrorMessagePrivate::nextPending() -

326 { -

327

while (!pending.empty()) {

!pending.empty()	Description
TRUE	never evaluated
FALSE	never evaluated

328 QPair<QString,QString> &pendingMessage = pending.front(); -

329 QString message = qMove(pendingMessage.first); -

330 QString type = qMove(pendingMessage.second); -

331 pending.pop(); -

332

if (isMessageToBeShown(message, type)) {

isMessageToBeS...message, type)	Description
TRUE	never evaluated
FALSE	never evaluated

333 #ifndef QT_NO_TEXTHTMLPARSER -

334 errors->setHtml(message); -

335 #else -

336 errors->setPlainText(message); -

337 #endif -

338 currentMessage = qMove(message); -

339 currentType = qMove(type); -

340

return true;

never executed: return true;

341 } -

342

}

never executed: end of block

343

return false;

never executed: return false;

344 } -

345 -

346 -

347 /*! -

348 Shows the given message, \a message, and returns immediately. If the user -

349 has requested for the message not to be shown again, this function does -

350 nothing. -

351 -

352 Normally, the message is displayed immediately. However, if there are -

353 pending messages, it will be queued to be displayed later. -

354 */ -

355 -

356 void QErrorMessage::showMessage(const QString &message) -

357 { -

358 showMessage(message, QString()); -

359

}

never executed: end of block

360 -

361 /*! -

362 \since 4.5 -

363 \overload -

364 -

365 Shows the given message, \a message, and returns immediately. If the user -

366 has requested for messages of type, \a type, not to be shown again, this -

367 function does nothing. -

368 -

369 Normally, the message is displayed immediately. However, if there are -

370 pending messages, it will be queued to be displayed later. -

371 -

372 \sa showMessage() -

373 */ -

374 -

375 void QErrorMessage::showMessage(const QString &message, const QString &type) -

376 { -

377 Q_D(QErrorMessage); -

378

if (!d->isMessageToBeShown(message, type))

!d->isMessageT...message, type)	Description
TRUE	never evaluated
FALSE	never evaluated

379

return;

never executed: return;

380 d->pending.push(qMakePair(message, type)); -

381

if (!isVisible() && d->nextPending())

!isVisible()	Description
TRUE	never evaluated
FALSE	never evaluated

d->nextPending()	Description
TRUE	never evaluated
FALSE	never evaluated

382

show();

never executed: show();

383

}

never executed: end of block

384 -

385 /*! -

386 \reimp -

387 */ -

388 void QErrorMessage::changeEvent(QEvent *e) -

389 { -

390 Q_D(QErrorMessage); -

391

if (e->type() == QEvent::LanguageChange) {

e->type() == Q...LanguageChange	Description
TRUE	never evaluated
FALSE	never evaluated

392 d->retranslateStrings(); -

393

}

never executed: end of block

394 QDialog::changeEvent(e); -

395

}

never executed: end of block

396 -

397 void QErrorMessagePrivate::retranslateStrings() -

398 { -

399 again->setText(QErrorMessage::tr("&Show this message again")); -

400 ok->setText(QErrorMessage::tr("&OK")); -

401

}

never executed: end of block

402 -

403 QT_END_NAMESPACE -

404 -

405 #include "moc_qerrormessage.cpp" -

406 -

407 #endif // QT_NO_ERRORMESSAGE -

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