QAbstractListModel dataChanged() refresh not working in QML

clogwog

In my main.cc i set a data-model to a

MyDataModel aDataModel;  // MyDataModel is a subclass of QAbstractListModel
ctxt->setContextProperty("aaModel", &aDataModel);

and in the QML i use it as the model like:

  ListView {
        model: aaModel
       delegate: Item { ...

this works fine when the QML is initially loaded, but when the data is updated it doesn't get re-evaluated and i still see the old data until i pop out of the QML and re-load.

when the data gets updated in the model i emit dataChanged(..) without avail.

any tips on how i can get the refresh can happen ?

jalomic

@clogwog said:

MyDataModel

Can you show some your code of this class ? especially data changing part

clogwog

@jalomic

of coarse:

// called when a REST function returns actual data
void MyDataModel::recentPhotoRequestDone()
{
QNetworkReply *reply = qobject_cast<QNetworkReply *>(sender());
QByteArray data = reply->readAll();
QDomDocument doc;
doc.setContent(data);
QDomNodeList nodes = doc.elementsByTagName("photo");

    image_list.clear();
    for(int t=0; t < nodes.count(); t++ )
    {
        QDomElement photo = nodes.at(t).toElement();
       if( datavalidchecks )
        {
            QString photoUrl = QString("http://farm%1.staticflickr.com/%2/%3_%4_q.jpg").arg(photo.attribute("farm"),photo.attribute("server"),photo.attribute("id"),photo.attribute("secret"));
            TSImageData image1(QUrl(photoUrl) );
            if( photo.hasAttribute("title"))
                image1.setName(photo.attribute("title"));
                image_list.append(image);
        }
    }
    int end1 = image_list.count();
    emit dataChanged (index(0),index(end1 ));
}

}

clogwog

found the answer here http://www.cplusplusdevelop.com/91_21846173/

instead of calling
emit dataChanged(...)

i now use beginInsertRows and endInserRows and it all starts working.

thanks @jalomic your question made me search more.

jalomic

@clogwog As expected