Qt everywhere - Step 5: Picture list downloading

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Qt for Maemo

QtWebKit

Qt Mobility: Location

Qt Mobility: Contacts

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Qt Quick

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Step 5: Picture list downloading

In this step you add the functionality to download the picture list and display it on the device screen.

bool FlickrDemo::parsePictureList(QString xmlString)
{
    QString errorStr;
    int errorLine;    
    int errorColumn;

    QDomDocument domDocument;
    if (!domDocument.setContent(xmlString, true, &errorStr,
    &errorLine, &errorColumn)) {
        QMessageBox::information(window(),
                        tr("Flickr Demo"),
                        tr("XML Parse error at line %1, column %2:\n%3")
                        .arg(errorLine).arg(errorColumn).arg(errorStr));
        return false;
    }
    QDomElement root = domDocument.documentElement();

    if (root.tagName() != "rsp") {
        QMessageBox::information(window(), tr("Flickr Demo"),
            tr("Invalid XML format."));
        return false;
    }
    if (root.attribute("stat") != "ok") {
        QMessageBox::information(window(), tr("Flickr Demo"),
            tr("Query failed."));
        return false;
    }

    listWidget->clear();
    QListWidgetItem* listItem;
    QDomElement photosElement = root.firstChildElement("photos");
    if (!photosElement.isNull()) {
        m_pages = (photosElement.attribute("pages")).toInt();
        m_page = (photosElement.attribute("page")).toInt();

        QDomElement child = photosElement.firstChildElement("photo");
        while (!child.isNull()) {
            QString url = "http://farm";
            url.append(child.attribute("farm"));
            url.append(".static.flickr.com/");
            url.append(child.attribute("server"));
            url.append("/");
            url.append(child.attribute("id"));
            url.append("_");
            url.append(child.attribute("secret"));

            m_names << url;

            listItem = new QListWidgetItem(child.attribute("title"));
            QImage image(thumbnailSize, QImage::Format_Mono);
            image.fill(1);
            listItem->setIcon(QPixmap::fromImage(image));
            listItem->setData(Qt::UserRole, url);
            listWidget->addItem(listItem);

            child = child.nextSiblingElement("photo");
        }
    } else {
        return false;
    }
    m_nameCounter = -1;
    downloadNextThumbnail();

    return true;
}

Select All

After making these additions, you can compile and run the application in the device. The result is that when you click "Download Picture List", the picture list appears, but without the picture thumbnails.

In case the application is not working properly, download and use this file.