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qqmlapplicationengine.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 Research In Motion.-
4** Contact: https://www.qt.io/licensing/-
5**-
6** This file is part of the QtQml module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL$-
9** Commercial License Usage-
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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.-
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26** Alternatively, this file may be used under the terms of the GNU-
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38****************************************************************************/-
39-
40#include <QtCore/QCoreApplication>-
41#include <QtCore/QTranslator>-
42#include <QQmlComponent>-
43#include "qqmlapplicationengine.h"-
44#include "qqmlapplicationengine_p.h"-
45#include "qqmlfileselector.h"-
46-
47QT_BEGIN_NAMESPACE-
48-
49QQmlApplicationEnginePrivate::QQmlApplicationEnginePrivate(QQmlEngine *e)-
50 : QQmlEnginePrivate(e)-
51{-
52}
executed 148 times by 7 tests: end of block
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148
53-
54QQmlApplicationEnginePrivate::~QQmlApplicationEnginePrivate()-
55{-
56}-
57-
58void QQmlApplicationEnginePrivate::cleanUp()-
59{-
60 Q_Q(QQmlApplicationEngine);-
61 for (auto obj : qAsConst(objects))-
62 obj->disconnect(q);
executed 178 times by 5 tests: obj->disconnect(q);
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178
63-
64 qDeleteAll(objects);-
65#if QT_CONFIG(translation)-
66 qDeleteAll(translators);-
67#endif-
68}
executed 148 times by 7 tests: end of block
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148
69-
70void QQmlApplicationEnginePrivate::init()-
71{-
72 Q_Q(QQmlApplicationEngine);-
73 q->connect(q, SIGNAL(quit()), QCoreApplication::instance(), SLOT(quit()));-
74 q->connect(q, &QQmlApplicationEngine::exit, QCoreApplication::instance(), &QCoreApplication::exit);-
75#if QT_CONFIG(translation)-
76 QTranslator* qtTranslator = new QTranslator;-
77 if (qtTranslator->load(QLatin1String("qt_") + QLocale::system().name(), QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
qtTranslator->...slationsPath))Description
TRUEnever evaluated
FALSEevaluated 148 times by 7 tests
Evaluated by:
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0-148
78 QCoreApplication::installTranslator(qtTranslator);
never executed: QCoreApplication::installTranslator(qtTranslator);
0
79 translators << qtTranslator;-
80#endif-
81 new QQmlFileSelector(q,q);-
82 QCoreApplication::instance()->setProperty("__qml_using_qqmlapplicationengine", QVariant(true));-
83}
executed 148 times by 7 tests: end of block
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148
84-
85void QQmlApplicationEnginePrivate::loadTranslations(const QUrl &rootFile)-
86{-
87#if QT_CONFIG(translation)-
88 if (rootFile.scheme() != QLatin1String("file") && rootFile.scheme() != QLatin1String("qrc"))
rootFile.schem...String("file")Description
TRUEevaluated 18 times by 2 tests
Evaluated by:
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FALSEevaluated 162 times by 4 tests
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rootFile.schem...1String("qrc")Description
TRUEevaluated 16 times by 1 test
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FALSEevaluated 2 times by 1 test
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2-162
89 return;
executed 16 times by 1 test: return;
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16
90-
91 QFileInfo fi(rootFile.toLocalFile());-
92-
93 QTranslator *translator = new QTranslator;-
94 if (translator->load(QLatin1String("qml_") + QLocale::system().name(), fi.path() + QLatin1String("/i18n"))) {
translator->lo...ring("/i18n"))Description
TRUEnever evaluated
FALSEevaluated 164 times by 4 tests
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0-164
95 QCoreApplication::installTranslator(translator);-
96 translators << translator;-
97 } else {
never executed: end of block
0
98 delete translator;-
99 }
executed 164 times by 4 tests: end of block
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164
100#else-
101 Q_UNUSED(rootFile)-
102#endif-
103}-
104-
105void QQmlApplicationEnginePrivate::startLoad(const QUrl &url, const QByteArray &data, bool dataFlag)-
106{-
107 Q_Q(QQmlApplicationEngine);-
108-
109 loadTranslations(url); //Translations must be loaded before the QML file is-
110 QQmlComponent *c = new QQmlComponent(q, q);-
111-
112 if (dataFlag)
dataFlagDescription
TRUEevaluated 20 times by 3 tests
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FALSEevaluated 160 times by 4 tests
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20-160
113 c->setData(data,url);
executed 20 times by 3 tests: c->setData(data,url);
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20
114 else-
115 c->loadUrl(url);
executed 160 times by 4 tests: c->loadUrl(url);
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160
116-
117 if (!c->isLoading()) {
!c->isLoading()Description
TRUEevaluated 180 times by 5 tests
Evaluated by:
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FALSEnever evaluated
0-180
118 finishLoad(c);-
119 return;
executed 180 times by 5 tests: return;
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180
120 }-
121 QObject::connect(c, &QQmlComponent::statusChanged, q, [this, c] { this->finishLoad(c); });
never executed: end of block
0
122}
never executed: end of block
0
123-
124void QQmlApplicationEnginePrivate::finishLoad(QQmlComponent *c)-
125{-
126 Q_Q(QQmlApplicationEngine);-
127 switch (c->status()) {-
128 case QQmlComponent::Error:
never executed: case QQmlComponent::Error:
0
129 qWarning() << "QQmlApplicationEngine failed to load component";-
130 qWarning() << qPrintable(c->errorString());-
131 q->objectCreated(nullptr, c->url());-
132 break;
never executed: break;
0
133 case QQmlComponent::Ready: {
executed 180 times by 5 tests: case QQmlComponent::Ready:
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180
134 auto newObj = c->create();-
135 objects << newObj;-
136 QObject::connect(newObj, &QObject::destroyed, q, [&](QObject *obj) { objects.removeAll(obj); });
executed 2 times by 1 test: end of block
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137 q->objectCreated(objects.constLast(), c->url());-
138 }-
139 break;
executed 180 times by 5 tests: break;
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180
140 case QQmlComponent::Loading:
never executed: case QQmlComponent::Loading:
0
141 case QQmlComponent::Null:
never executed: case QQmlComponent::Null:
0
142 return; //These cases just wait for the next status update
never executed: return;
0
143 }-
144-
145 c->deleteLater();-
146}
executed 180 times by 5 tests: end of block
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180
147-
148/*!-
149 \class QQmlApplicationEngine-
150 \since 5.1-
151 \inmodule QtQml-
152 \brief QQmlApplicationEngine provides a convenient way to load an application from a single QML file.-
153-
154 This class combines a QQmlEngine and QQmlComponent to provide a convenient way to load a single QML file. It also exposes some central application functionality to QML, which a C++/QML hybrid application would normally control from C++.-
155-
156 It can be used like so:-
157-
158 \code-
159 #include <QGuiApplication>-
160 #include <QQmlApplicationEngine>-
161-
162 int main(int argc, char *argv[])-
163 {-
164 QGuiApplication app(argc, argv);-
165 QQmlApplicationEngine engine("main.qml");-
166 return app.exec();-
167 }-
168 \endcode-
169-
170 Unlike QQuickView, QQmlApplicationEngine does not automatically create a root-
171 window. If you are using visual items from Qt Quick, you will need to place-
172 them inside of a \l [QML] {Window}.-
173-
174 You can also use QCoreApplication with QQmlApplicationEngine, if you are not using any QML modules which require a QGuiApplication (such as \c QtQuick).-
175-
176 List of configuration changes from a default QQmlEngine:-
177-
178 \list-
179 \li Connecting Qt.quit() to QCoreApplication::quit()-
180 \li Automatically loads translation files from an i18n directory adjacent to the main QML file.-
181 \li Automatically sets an incubation controller if the scene contains a QQuickWindow.-
182 \li Automatically sets a \c QQmlFileSelector as the url interceptor, applying file selectors to all-
183 QML files and assets.-
184 \endlist-
185-
186 The engine behavior can be further tweaked by using the inherited methods from QQmlEngine.-
187-
188*/-
189-
190/*!-
191 \fn QQmlApplicationEngine::objectCreated(QObject *object, const QUrl &url)-
192-
193 This signal is emitted when an object finishes loading. If loading was-
194 successful, \a object contains a pointer to the loaded object, otherwise-
195 the pointer is NULL.-
196-
197 The \a url to the component the \a object came from is also provided.-
198-
199 \note If the path to the component was provided as a QString containing a-
200 relative path, the \a url will contain a fully resolved path to the file.-
201*/-
202-
203/*!-
204 Create a new QQmlApplicationEngine with the given \a parent. You will have to call load() later in-
205 order to load a QML file.-
206*/-
207QQmlApplicationEngine::QQmlApplicationEngine(QObject *parent)-
208: QQmlEngine(*(new QQmlApplicationEnginePrivate(this)), parent)-
209{-
210 Q_D(QQmlApplicationEngine);-
211 d->init();-
212 QJSEnginePrivate::addToDebugServer(this);-
213}
executed 148 times by 7 tests: end of block
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148
214-
215/*!-
216 Create a new QQmlApplicationEngine and loads the QML file at the given \a url.-
217 This is provided as a convenience, and is the same as using the empty constructor and calling load afterwards.-
218*/-
219QQmlApplicationEngine::QQmlApplicationEngine(const QUrl &url, QObject *parent)-
220 : QQmlApplicationEngine(parent)-
221{-
222 load(url);-
223}
executed 14 times by 3 tests: end of block
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14
224-
225/*!-
226 Create a new QQmlApplicationEngine and loads the QML file at the given-
227 \a filePath, which must be a local file path. If a relative path is-
228 given then it will be interpreted as relative to the working directory of the-
229 application.-
230-
231 This is provided as a convenience, and is the same as using the empty constructor and calling load afterwards.-
232*/-
233QQmlApplicationEngine::QQmlApplicationEngine(const QString &filePath, QObject *parent)-
234 : QQmlApplicationEngine(QUrl::fromUserInput(filePath, QLatin1String("."), QUrl::AssumeLocalFile), parent)-
235{-
236}
executed 2 times by 1 test: end of block
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2
237-
238/*!-
239 Destroys the QQmlApplicationEngine and all QML objects it loaded.-
240*/-
241QQmlApplicationEngine::~QQmlApplicationEngine()-
242{-
243 Q_D(QQmlApplicationEngine);-
244 QJSEnginePrivate::removeFromDebugServer(this);-
245 d->cleanUp();//Instantiated root objects must be deleted before the engine-
246}
executed 148 times by 7 tests: end of block
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148
247-
248/*!-
249 Loads the root QML file located at \a url. The object tree defined by the file-
250 is created immediately for local file urls. Remote urls are loaded asynchronously,-
251 listen to the objectCreated signal to determine when the object-
252 tree is ready.-
253-
254 If an error occurs, error messages are printed with qWarning.-
255*/-
256void QQmlApplicationEngine::load(const QUrl &url)-
257{-
258 Q_D(QQmlApplicationEngine);-
259 d->startLoad(url);-
260}
executed 158 times by 4 tests: end of block
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158
261-
262/*!-
263 Loads the root QML file located at \a filePath. \a filePath must be a path to-
264 a local file. If \a filePath is a relative path, it is taken as relative to-
265 the application's working directory. The object tree defined by the file is-
266 instantiated immediately.-
267-
268 If an error occurs, error messages are printed with qWarning.-
269*/-
270void QQmlApplicationEngine::load(const QString &filePath)-
271{-
272 Q_D(QQmlApplicationEngine);-
273 d->startLoad(QUrl::fromUserInput(filePath, QLatin1String("."), QUrl::AssumeLocalFile));-
274}
executed 2 times by 1 test: end of block
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2
275-
276/*!-
277 Loads the QML given in \a data. The object tree defined by \a data is-
278 instantiated immediately.-
279-
280 If a \a url is specified it is used as the base url of the component. This affects-
281 relative paths within the data and error messages.-
282-
283 If an error occurs, error messages are printed with qWarning.-
284*/-
285void QQmlApplicationEngine::loadData(const QByteArray &data, const QUrl &url)-
286{-
287 Q_D(QQmlApplicationEngine);-
288 d->startLoad(url, data, true);-
289}
executed 20 times by 3 tests: end of block
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20
290-
291/*!-
292 Returns a list of all the root objects instantiated by the-
293 QQmlApplicationEngine. This will only contain objects loaded via load() or a-
294 convenience constructor.-
295-
296 \note In Qt versions prior to 5.9, this function is marked as non-\c{const}.-
297*/-
298-
299QList<QObject *> QQmlApplicationEngine::rootObjects() const-
300{-
301 Q_D(const QQmlApplicationEngine);-
302 return d->objects;
executed 232 times by 4 tests: return d->objects;
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232
303}-
304-
305#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)-
306/*!-
307 \overload-
308 \internal-
309*/-
310QList<QObject *> QQmlApplicationEngine::rootObjects()-
311{-
312 return qAsConst(*this).rootObjects();
executed 232 times by 4 tests: return qAsConst(*this).rootObjects();
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232
313}-
314#endif // < Qt 6-
315-
316QT_END_NAMESPACE-
317-
318#include "moc_qqmlapplicationengine.cpp"-
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