Parse QList<QVariantMap> to QML

CharlieG

Hello,

With this code :

Folder2Xml.h

Q_PROPERTY(QList<QVariantMap> mapList READ mapList WRITE setMapList NOTIFY mapListChanged)

//........

QList<QVariantMap> mapList() const;
void setMapList(const QList<QVariantMap> &a);

Folder2Xml.cpp

QList<QVariantMap> Folder2Xml::mapList() const
{
    return m_mapList;
}

void Folder2Xml::setMapList(const QList<QVariantMap> &a)
{
    if (a != m_mapList) {
        m_mapList = a;
        emit mapListChanged();
    }
}

//............

void Folder2Xml::getRecursive()
{
    m_mapList.clear();
    QDirIterator it(m_pathDoc, QDir::Files | QDir::NoDotAndDotDot, QDirIterator::Subdirectories);
    while (it.hasNext()) {
        QFileInfo fileInfo(it.next());
        // m_map is a QVariantMap public member 
        m_map["fileName"] = fileInfo.baseName();
        m_map["filePath"] = fileInfo.absoluteFilePath();

        m_mapList.append(m_map);
    }

    qDebug() << "m_pathDoc" << m_pathDoc;
    qDebug() << "m_mapList.length()" << m_mapList.length();
}

In my case, m_mapList.length() = 219.

But in my QML file, I can't use mapList :

Folder2Xml{
        id: folder2Xml
        pathDoc: "/Path/to/my/dir/"
    }

function myFunction(){
        folder2Xml.getRecursive()
        console.log(folder2Xml.mapList)  // = QVariant(QList<QVariantMap>)
        console.log(folder2Xml.mapList.length) // = 0
}

Could you help me ?

Thank you very much in advance.

Charlie

? Offline

Hi! I think you can only return certain built-in QList<Something>'s. With a quick look at the docs I think you can actually only use:

QList<int>
QList<qreal>
QList<bool>
QList<QString> and QStringList
QList<QUrl>
QVector<int>
QVector<qreal>
QVector<bool>

and QList<QObject*>. Not even sure about QVector<QObject*>.

For any other QList<Something> you'd use a QVariantList as your Q_PROPERTY / as return value from a Q_INVOKABLE.

CharlieG

Hi,

Thank you for your answer. This is that I thought.
So, I modified my code with :

QVariant Folder2Xml::getRecursive(QString path)
{
    QVariantMap map;
    QVariantList vList;
    QDirIterator it(path, QDir::Files | QDir::NoDotAndDotDot, QDirIterator::Subdirectories);
    while (it.hasNext()) {
        QFileInfo fileInfo(it.next());

        map["fileName"] = fileInfo.baseName();
        map["filePath"] = fileInfo.absoluteFilePath();
        map["opt"] = false;

        vList.append(map);
        map.clear();
    }

    return QVariant::fromValue(vList);
}

Thank you.

Bye

-C