Iterate through all groups and keys in QSettings

gistfile1.cpp

QString allGroupsString;
QSettings* settings = Settings::globalObject();
foreach (const QString &group, settings->childGroups()) {
    QString groupString = QString("<table><th>..%1..</th>").arg(group);
    settings->beginGroup(group);

    foreach (const QString &key, settings->childKeys()) {
        groupString.append(QString("<tr><td>%1</td><td>%2</td></tr>").arg(key, settings->value(key).toString()));
    }
    
    settings->endGroup();
    groupString.append("</table>");

    allGroupsString.append(groupString);
}

// allGroupsString now should contain all groups in table