About integrating c++ and qml



  • Hello ,
    I would like to ask when should I use the qml register type and when to use the plugin.
    Actually the concept is new to me and I feel confused and I don’t know from where to start.
    I watched the video of Qt developer days 2011 It is discussing this task it clarified a little bit some concepts but I still find it ambiguous .
    Thanks in advance.



  • It looks like plugins are useful when you want to package a QML component or collection of components for the purpose of using them in different projects or making them available to other developers. I used register type in my main c++ program just to make a c++ class accessible from my QML code ...

    qmlRegisterType<WorkerThread>("com.myapp.myclass", 1, 0, "MyApi");

    and then import it in my qml file ...

    import com.myapp.myclass 1.0



  • thanks Duff but I find this concept very difficult .



  • Check out this page in the documentation. This is how I figured out how to integrate my c++ class ...

    http://qt-project.org/doc/qt-5/qtqml-cppintegration-topic.html



  • Thanks Duff, sometimes in the tutorials they say extending qml from c++ and sometimes they say extending c++ from qml do you know what are the differences.



  • Well, it goes both ways. You can access c++ classes from QML and access QML objects from C++. Just depends on what you are trying to accomplish.



  • ok , what about the wrapper object when should I use it and what does it d exactly?


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