Pass QMap type to QML

[Vinoth Rajendran4]

Hi All,
Is it possible to pass QMap<T1,T2> type as types in Q_PROPERTY and be possible to access them in QML ?

I could see we can use QVariantMap, but i dont want to pass QString as key. I need to pass an enumerator as key .

Can someone point me in correct direction.

Thanks in advance.

[raven-worx]

@Vinoth-Rajendran4
using an enumerator as key is not JSON conform, no way around it.
So there is no direct way to support any types other the ones mentioned here: https://doc.qt.io/qt-5/qtqml-cppintegration-data.html
For everything else you need to create custom QML types or QObject based wrappers for example.

[kenneth.fernandez]

Hi @Vinoth-Rajendran4

@raven-worx is right. Here is an example of a custom C++ type that maybe could help you:

class QCustomMap: public QObject
{
   Q_OBJECT
public :
   QCustomMap();

   Q_INVOKABLE int getId(int id) const
   {
        return _someMap.contains(id) ? _someMap[id] : 0;
   }

private:
    const static QMap<int, int> _someMap;  ///< Map for your elements
}

But It depends on what you want to do and your base code, maybe what you want is to use only a Q_INVOKABLE in your current QObject instead a Q_PROPERTY to get/update the values and also create/register a Q_ENUMS for you to be able to use the ENUM on QML, let me know what is your plan or architecture and I will send you some additional code as reference. I hope this would help you for the moment.

[Kofr]

@Vinoth-Rajendran4 QML works well with QVariantMap