Nice Solution to push Class on QVariant and take back...

[patrik08]

You like the Long or fast way to transport self made class on QObject?

Here a short way..

class Qmailf;
 
/// 6 okt. 2013 save on svn 
/// great this to push class on qvariant
//// http://qt-gmail-access.googlecode.com/svn/trunk/GmailHand/mime_standard.h
 
template <class T> class VPtr {
public:
 
    static T* asPtr(QVariant v) {
        return (T *) v.value<void *>();
    }
 
    static QVariant asQVariant(T* ptr) {
        return qVariantFromValue((void *) ptr);
    }
};
 
/*
 http://blog.bigpixel.ro/2010/04/storing-pointer-in-qvariant/
 MyClass *p;
QVariant v = VPtr<MyClass>::asQVariant(p);
 
MyClass *p1 = VPtr<MyClass>::asPtr(v);
 *  MMime::MimeTypes help;
 */

class Qmailf;

/// 6 okt. 2013 save on svn 
/// great this to push class on qvariant
//// http://qt-gmail-access.googlecode.com/svn/trunk/GmailHand/mime_standard.h

template <class T> class VPtr {
public:

    static T* asPtr(QVariant v) {
        return (T *) v.value<void *>();
    }

    static QVariant asQVariant(T* ptr) {
        return qVariantFromValue((void *) ptr);
    }
};

/*
 http://blog.bigpixel.ro/2010/04/storing-pointer-in-qvariant/
 MyClass *p;
QVariant v = VPtr<MyClass>::asQVariant(p);

MyClass *p1 = VPtr<MyClass>::asPtr(v);
 *  MMime::MimeTypes help;
 */

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Or the long long way...

class Qmailf {
public:
    Qmailf(int id) : chunk(""), mime("txt"), file("file.txt"), ext("txt"), uuid(id) {
 
    }
    void SetChunk(const QByteArray& x) {
        chunk = x;
        ///// qDebug() << "incomming <" << uuid << ">  ";
    }
    /// set mime automatic 
    /// todo filename resolver from header && id from inline image 
    void SetMeta(const QString x) {
        meta_header = x;
        MMime::MimeTypes help;
        mime = help.Contenttype_Resolver(x);
        ext = help.MimeFromContent(mime);
        QString def(QString("mail_header_%1.%2").arg(uuid).arg(ext));
        file = def;
    }
     /// no make file or db  take the chunk from mail and send at the right place
    void SetFile(const QString dfile) {
        MMime::MimeTypes fmime;
        QFileInfo fi(dfile);
        file = fi.fileName();
        ext = fi.suffix();
        mime = fmime.value(ext);
    }
    QByteArray Chunk() {
        return chunk;
    }
    QString Mime() {
        return mime;
    }
    int Uid() {
        return uuid;
    }
    QString Filename() {
        return file;
    }
    void Info() {
        QByteArray text = QByteArray::fromBase64(chunk);
        qDebug() << "Content-Type:" << Mime() << " - " <<   Filename();
        qDebug() << "Meta:" << meta_header;
        qDebug() << "Body first 28 chunk:" << text.mid(0,20).simplified();
        text.clear();
    }
private:
    QByteArray chunk; // base64 encoded or other meta_heade having info
    QString mime;
    QString meta_header;  /// meta info  to create a file or o drupal node 
    QString file;
    QString ext;
    int uuid;
};
 
typedef QMap<int, QVariant> Attach_File_Map;
//// http://www.qtcentre.org/wiki/index.php?title=Using_custom_data_types_with_Qt
 
/// from this can create 
/// mail dir format or other 
/// i need to convert on drupal node and send on cms 
 
struct ICmail {
    quint64 uuid;
    QString msgid;
    quint64 multipart;
    QString sender;  //// long chunk history from one mail 
    QString md5; /// from incomming file server
    QString from;
    QString to;
    QString subject;
    QByteArray charcodec;
    QString transferencoding;
    QString language;
    QString date;
    QString txt;
    QString html; // image inline base64 encodet
    QString master;
    QString boundary;
    QString root_cmd;
    QMap<int, QVariant> alist;
    operator QVariant() const {
        return QVariant::fromValue(*this);
    }
};
 
/// todo a textstream for console to insert chort info from this mail
 
inline QDataStream& operator<<(QDataStream& out, const ICmail& mail) {
    out << mail.from;
    out << mail.subject;
    out << mail.md5;
    out << mail.date;
    out << mail.boundary;
    return out;
}
inline QDataStream& operator>>(QDataStream& in, ICmail& mail) {
    in >> mail.from;
    in >> mail.subject;
    in >> mail.md5;
    in >> mail.date;
    in >> mail.boundary;
    return in;
}
 
/*
 
  << mail.txt << ",\n"
  << mail.html << ",\n"
 */
inline QDebug &operator <<(QDebug debug, const ICmail &mail) {
    debug.nospace() << "ICmail{start(\n"
            << mail.from << ",\n"
            << mail.subject << ",\nContent-Transfer-Encoding:"
            << mail.transferencoding << "\n,"
            << mail.date << "\n,"
            << mail.boundary << "\n,"
            << mail.multipart << "\n,\nRoot cmd Content-Type:\n"
            << mail.root_cmd << ")end}\n";
 
    return debug.space();
}
Q_DECLARE_METATYPE(ICmail);

class Qmailf {
public:
    Qmailf(int id) : chunk(""), mime("txt"), file("file.txt"), ext("txt"), uuid(id) {

    }
    void SetChunk(const QByteArray& x) {
        chunk = x;
        ///// qDebug() << "incomming <" << uuid << ">  ";
    }
    /// set mime automatic 
    /// todo filename resolver from header && id from inline image 
    void SetMeta(const QString x) {
        meta_header = x;
        MMime::MimeTypes help;
        mime = help.Contenttype_Resolver(x);
        ext = help.MimeFromContent(mime);
        QString def(QString("mail_header_%1.%2").arg(uuid).arg(ext));
        file = def;
    }
     /// no make file or db  take the chunk from mail and send at the right place
    void SetFile(const QString dfile) {
        MMime::MimeTypes fmime;
        QFileInfo fi(dfile);
        file = fi.fileName();
        ext = fi.suffix();
        mime = fmime.value(ext);
    }
    QByteArray Chunk() {
        return chunk;
    }
    QString Mime() {
        return mime;
    }
    int Uid() {
        return uuid;
    }
    QString Filename() {
        return file;
    }
    void Info() {
        QByteArray text = QByteArray::fromBase64(chunk);
        qDebug() << "Content-Type:" << Mime() << " - " <<   Filename();
        qDebug() << "Meta:" << meta_header;
        qDebug() << "Body first 28 chunk:" << text.mid(0,20).simplified();
        text.clear();
    }
private:
    QByteArray chunk; // base64 encoded or other meta_heade having info
    QString mime;
    QString meta_header;  /// meta info  to create a file or o drupal node 
    QString file;
    QString ext;
    int uuid;
};

typedef QMap<int, QVariant> Attach_File_Map;
//// http://www.qtcentre.org/wiki/index.php?title=Using_custom_data_types_with_Qt

/// from this can create 
/// mail dir format or other 
/// i need to convert on drupal node and send on cms 

struct ICmail {
    quint64 uuid;
    QString msgid;
    quint64 multipart;
    QString sender;  //// long chunk history from one mail 
    QString md5; /// from incomming file server
    QString from;
    QString to;
    QString subject;
    QByteArray charcodec;
    QString transferencoding;
    QString language;
    QString date;
    QString txt;
    QString html; // image inline base64 encodet
    QString master;
    QString boundary;
    QString root_cmd;
    QMap<int, QVariant> alist;
    operator QVariant() const {
        return QVariant::fromValue(*this);
    }
};

/// todo a textstream for console to insert chort info from this mail

inline QDataStream& operator<<(QDataStream& out, const ICmail& mail) {
    out << mail.from;
    out << mail.subject;
    out << mail.md5;
    out << mail.date;
    out << mail.boundary;
    return out;
}
inline QDataStream& operator>>(QDataStream& in, ICmail& mail) {
    in >> mail.from;
    in >> mail.subject;
    in >> mail.md5;
    in >> mail.date;
    in >> mail.boundary;
    return in;
}

/*

  << mail.txt << ",\n"
  << mail.html << ",\n"
 */
inline QDebug &operator <<(QDebug debug, const ICmail &mail) {
    debug.nospace() << "ICmail{start(\n"
            << mail.from << ",\n"
            << mail.subject << ",\nContent-Transfer-Encoding:"
            << mail.transferencoding << "\n,"
            << mail.date << "\n,"
            << mail.boundary << "\n,"
            << mail.multipart << "\n,\nRoot cmd Content-Type:\n"
            << mail.root_cmd << ")end}\n";

    return debug.space();
}
Q_DECLARE_METATYPE(ICmail);

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[anda_skoa]

The long way looks a lot shorter then the short way

The long way requires a Q_DECLARE_METATYPE, the short way requires a helper template and C-style casts.

Cheers,
_

[wysota]

The short way doesn't check validity of the cast.