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Editorial Team
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Asked: 2026-05-30T09:38:55+00:00

So here is my complicated question and I hope you know the answer :)

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So here is my complicated question and I hope you know the answer 🙂

I am developing app for android using Qt Necessitas.
I have made .ui file for GUI and I didn’t find it what I really want so a lot of people suggested QML as it is very dynamic and a lot of options available.

But problem to me is as I have never been working with QML before.

I need a bit of help just with few functions so I can know how to do it later.

For example. this is my function which I call it to read data from database using a post method and calling php script.

void MainWindow::Citanje_korisnika()  //read users
{
    init();
    QUrl params;
    params.addQueryItem("action","Citanje_korisnika");
    QByteArray data;
    data.append(params.toString());
    data.remove(0,1);
    QNetworkRequest request;
    request.setUrl(url);
    request.setHeader(QNetworkRequest::ContentTypeHeader,
    QVariant("application/x-www-form-urlencoded"));
    reply = manager->post(request, data);
    connect(reply, SIGNAL(downloadProgress(qint64, qint64)),this, SLOT(updateDataTransferProgress(qint64,qint64)));
}

  1. So my question is how to call this function from qml code? For example when user presses button?

  2. After that I have this function which puts me everything into my form.

    void MainWindow::Pokazi(QList< QMap<QString,QString> >& osobe)  //show
{
    i_max=osobe.count();
    osobe_next=osobe;
    osoba = osobe.at(0);
    //trenutni_id=osoba["id"];
    ui->label_ID->setText(osoba["id"]);
    ui->line_ime->insert(osoba["ime"]);
    ui->line_prezime->insert(osoba["prezime"]);
    ui->line_telefon->insert(osoba["broj"]);
    ui->line_adresa->insert(osoba["adresa"]);
}

So this is where I want to display all persons on my list.

  1. Is it possible to load this above QList into QML ListView which looks like this?
    Can I populate it dynamically?

    ListModel {
    ListElement {
        name: "Bill Smith"
        number: "555 3264"
    }
    ListElement {
        name: "John Brown"
        number: "555 8426"
    }
}

This is only example with already inserted values. My question is how to make it populate from qml code dynamically?

And I want to get my list looks like second picture in this link: http://doc.qt.nokia.com/4.7-snapshot/qml-listview.html

I managed to make it looks like this but problem is I want to load my data dynamically inside I don’t want it predefined.

If you need more code let me know.

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1 Answer

  1. Editorial Team

    1) calling c++ function from QML is easy.
    You need to expose your object via setContextProperty
    QDeclarativeContext *ctxt = view.rootContext();
    ctxt->setContextProperty(“timer”, &timerObj);

    Then you can call any slots of exposed object or function which is declated as Q_INVOKABLE.

    This link may help you more.

    2) You need to create model, you can use QStringListModel, or you can create custom model derived from QAbstractListModel.

    Hope this will help you.

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