Question

(EDITED) In original question I erroneously assumed that GridView natively use 2-dimensional model. Indeed, it takes a list of elements similarly as other QML
views. To make the question and answers more understandable I changed given code
slightly. Moreover, I added working soluton based on answers.

In main program I define an instance of QStandardItemModel:

QScopedPointer<QApplication> app(createApplication(argc, argv));
QmlApplicationViewer viewer;

QStandardItemModel* cppmodel = new QStandardItemModel();
for (int i=0; i<100; i++) {
    QStandardItem* item = new QStandardItem(QString("%1").arg(i,2,10,QChar('0')));
    cppmodel->appendRow(item);
}

Then, I register the model to QML with:

viewer.rootContext()->setContextProperty("cppModel",cppmodel);

QStandardItemModel is a table,isn’t it? Then, how can I write a delegate to
show items in a simple GridView:

    GridView {
        model: cppModel
        delegate: Rectangle {
            Text { text: ??? } //WHAT MUST BE USED HERE ???
        }
    }

Do I have to use named roles or can I just use properly created indices?

Answer 1

Maybe It helps you:
Using QStandardItemModel in QML

Also you can try such code:

GridView {
   anchors.fill: parent
   model: cppModel
   delegate: Rectangle {
      Text {
         text: display;
      }
   }
}