What is QQmlEngine?
The QQmlEngine class provides an environment for instantiating QML components.
What is qmlRegisterType?
“Sometimes a QObject-derived class may need to be registered with the QML type system but not as an instantiable type.” Use qmlRegisterType, if you want reuse a QObject-derived class with in one or more than one qml file with different property.
What is Q_unused?
# define Q_UNUSED(x) (void)x; To disable unused variable warnings. You can use the variable after this macro without any problem. However, if you pass an expression or something else to the macro and the compiler has to evaluate the expression it may has side effects†. Follow this answer to receive notifications.
What is Qml_element?
The most important one is “QML_ELEMENT”. It provides the surrounding class in QML as an element named by the C++ class name. The meta object compiler (moc) will find the information given this way.
What is a QML plugin?
QML extension plugins are for either application-specific or library-like plugins. Library plugins should limit themselves to registering types, as any manipulation of the engine’s root context may cause conflicts or other issues in the library user’s code.
What is quint32?
quint32. Typedef for unsigned int . This type is guaranteed to be 32-bit on all platforms supported by Qt.
How does Qt translation work?
The Qt tools provide context information for each of the phrases to help the translator, and the developer is able to add additional context information to phrases when necessary. The release manager generates a set of translation files that are produced from the source files and passes these to the translator.
What is Q_invokable?
Q_INVOKABLE simply marks a method to be callable via moc (and thus also via QML for example), nothing more. Similar to slots for example.
What is QML coding?
QML (Qt Modeling Language) is a user interface markup language. It is a declarative language (similar to CSS and JSON) for designing user interface–centric applications. Inline JavaScript code handles imperative aspects.
What are QML objects?
A QML object type is a type from which a QML object can be instantiated. In syntactic terms, a QML object type is one which can be used to declare an object by specifying the type name followed by a set of curly braces that encompasses the attributes of that object.
Where is QML used?
It is associated with Qt Quick, the UI creation kit originally developed by Nokia within the Qt framework. Qt Quick is used for mobile applications where touch input, fluid animations and user experience are crucial. QML is also used with Qt3D to describe a 3D scene and a “frame graph” rendering methodology.