[Interest] Context ambiguities when exposing a Qt Stringlist to QML

[Willem Ferguson]

Here are QML and C++ snippets. The root context provides a context to 
the top-level QML rectangle. But the QStringList is required by the 
grandchild of the top-level rectangle. I suspect the context for 
exposing the QStringList is inappropriate. What is the correct approach 
here?

C++:

int  main(int  argc,  char  **  argv)
{
    QGuiApplication <http://doc.qt.io/qt-5/qguiapplication.html>  app(argc,  
argv);

    QStringList <http://doc.qt.io/qt-5/qstringlist.html>  dataList;
    dataList.append("Apples");
    dataList.append("Oranges");
    dataList.append("Bananas");
    dataList.append("Grapes");

    QQuickView <http://doc.qt.io/qt-5/qquickview.html>  view;
    QQmlContext <http://doc.qt.io/qt-5/qqmlcontext.html>  *ctxt=  
view.rootContext();
    ctxt->setContextProperty("myModel",  QVariant 
<http://doc.qt.io/qt-5/qvariant.html>::fromValue(dataList));

    view.setSource(QUrl <http://doc.qt.io/qt-5/qurl.html>("qrc:view.qml"));
    view.show();

    return  app.exec();
}

QML:

import QtQuick 2.0

Rectangle { <http://doc.qt.io/qt-5/qml-qtquick-listview.html> width: 
400; height 400 Rectangle { width: 200; height 200 ListView 
<http://doc.qt.io/qt-5/qml-qtquick-listview.html>  {
    width:100;height:100
            model:myModel
            delegate:Rectangle  {
                height:25;  width:100
            Text <http://doc.qt.io/qt-5/qml-qtquick-text.html>  {text:modelData 
 }
            }
        }

   }
}

ctxt in the C++ code relates to the outer bounding rectangle, thus the 
context of myModel is inappropriate with respect to the ListView item. 
Am I correct? If so, how should one correct this? Any feedback will be 
highly appreciated. The QQmlContext documentation gives no indication 
about solutions for this.
Kind regards,
Willem




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