Using same constants in QML Scripts and C++

[FabQ]

Hello,

I have started a QML application and I would like to use same constants in QML scripts AND in C++ part.
I will have 50 to 100 constants (most of them will be some strings) to define.
What are possibilities to do it ?

Thanks.

[ODБOï]

@FabQ hi
this is 6 years old but still can help https://forum.qt.io/topic/19557/solved-exporting-functions-and-constants-from-c-to-qml

might i ask you what to use these constants ?

[J.Hilk]

@FabQ

I think, what you're looking for is the QGlobalStatic Class, To access it in QML, you should make it available via

rootContext()->setContextProperty("Name",Instance Pointer);
This this link for more information

[GPBeta]

Please consider using the Q_ENUM tag:

class Constants : public QObject {
    Q_OBJECT
public:

    enum ConstantValues{ MinValue = 0, MaxValue = 65535 };
    Q_ENUM(ConstantValues)

};

Now you can access Constants::MinValue with C++ and Constants.MinValue with QML.

[Diracsbracket]

@FabQ
To add to what @GPBeta wrote, this requires you to register the Constants class

 qmlRegisterType<Constants>("your.module", 0, 1, "Constants");

http://doc.qt.io/qt-5/qtqml-cppintegration-data.html#enumeration-types

[dheerendra]

All solutions revolve around registering the class with QML. You can consider using Q_GADGET, if you don't want to inherit from QObject while exposing constants to QML.

[FabQ]

Thanks to all for your responses.
I did a mix of your answers (using more the answer of @J.Hilk) and it works perfectly.