CODEWITHSUNDEEP
androidc++qtqml
user123_456
user123_456

Reputation: 5805

Connecting QML and Qt

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.

Upvotes: 1

Views: 1265

Answers (1)

Kunal
Kunal

Reputation: 3535

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.

Upvotes: 2

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