diff options
| -rw-r--r-- | src/qml/qml/qqmlengine.cpp | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/src/qml/qml/qqmlengine.cpp b/src/qml/qml/qqmlengine.cpp index f97612ab75..ad57b1f74b 100644 --- a/src/qml/qml/qqmlengine.cpp +++ b/src/qml/qml/qqmlengine.cpp @@ -1360,12 +1360,16 @@ void QQmlEngine::setOutputWarningsToStandardError(bool enabled) \code class MySingleton : public QObject { Q_OBJECT + + // Register as default constructed singleton. + QML_ELEMENT + QML_SINGLETON + static int typeId; // ... }; - // Register with QObject* callback - MySingleton::typeId = qmlRegisterSingletonType<MySingleton>(...); + MySingleton::typeId = qmlTypeId(...); // Retrieve as QObject* QQmlEngine engine; @@ -1382,11 +1386,10 @@ void QQmlEngine::setOutputWarningsToStandardError(bool enabled) QJSValue instance = engine.singletonInstance<QJSValue>(typeId); \endcode - It is recommended to store the QML type id during registration, e.g. as a static member - in the singleton class. Otherwise, a costly lookup via qmlTypeId() has to be performed - at run-time. + It is recommended to store the QML type id, e.g. as a static member in the + singleton class. The lookup via qmlTypeId() is costly. - \sa qmlRegisterSingletonType(), qmlTypeId() + \sa QML_SINGLETON, qmlRegisterSingletonType(), qmlTypeId() \since 5.12 */ template<> |