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Inheritance QDataStream

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  • K Offline
    K Offline
    klynxe
    wrote on last edited by
    #1

    I try inheritance QDataStream

    class DPCOQDataStream : public QDataStream
    {
    Q_OBJECT
    public:
        DPCOQDataStream();
        DPCOQDataStream(QIODevice *);
        DPCOQDataStream(QByteArray *, QIODevice::OpenMode flags);
        DPCOQDataStream(const QByteArray &);
    };
    
    DPCOQDataStream::DPCOQDataStream(): QDataStream()
    {
        setByteOrder(QDataStream::LittleEndian);
        setVersion(QDataStream::Qt_5_8);
    }
    
    DPCOQDataStream::DPCOQDataStream(QIODevice *io): QDataStream(io)
    {
        setByteOrder(QDataStream::LittleEndian);
        setVersion(QDataStream::Qt_5_8);
    }
    
    DPCOQDataStream::DPCOQDataStream(QByteArray * io, QIODevice::OpenMode flags): QDataStream(io, flags)
    {
        setByteOrder(QDataStream::LittleEndian);
        setVersion(QDataStream::Qt_5_8);
    }
    
    DPCOQDataStream::DPCOQDataStream(const QByteArray & ba): QDataStream(ba)
    {
        setByteOrder(QDataStream::LittleEndian);
        setVersion(QDataStream::Qt_5_8);
    }
    
    

    but have errors:
    'staticMetaObject': is not a member of 'QDataStream'
    left of '->metaObject' must point to class/struct/union/generic type
    left of '->dynamicMetaObject' must point to class/struct/union/generic type
    'qt_metacast': is not a member of 'QDataStream'
    'qt_metacall': is not a member of 'QDataStream'

    kshegunovK 1 Reply Last reply
    0
    • ? Offline
      ? Offline
      A Former User
      wrote on last edited by
      #3

      Hi!

      class DPCOQDataStream : public QDataStream
      {
      Q_OBJECT  // <-- bam!
      public:
      

      QDataStream isn't a QObject.

      K 1 Reply Last reply
      3
      • K klynxe

        I try inheritance QDataStream

        class DPCOQDataStream : public QDataStream
        {
        Q_OBJECT
        public:
            DPCOQDataStream();
            DPCOQDataStream(QIODevice *);
            DPCOQDataStream(QByteArray *, QIODevice::OpenMode flags);
            DPCOQDataStream(const QByteArray &);
        };
        
        DPCOQDataStream::DPCOQDataStream(): QDataStream()
        {
            setByteOrder(QDataStream::LittleEndian);
            setVersion(QDataStream::Qt_5_8);
        }
        
        DPCOQDataStream::DPCOQDataStream(QIODevice *io): QDataStream(io)
        {
            setByteOrder(QDataStream::LittleEndian);
            setVersion(QDataStream::Qt_5_8);
        }
        
        DPCOQDataStream::DPCOQDataStream(QByteArray * io, QIODevice::OpenMode flags): QDataStream(io, flags)
        {
            setByteOrder(QDataStream::LittleEndian);
            setVersion(QDataStream::Qt_5_8);
        }
        
        DPCOQDataStream::DPCOQDataStream(const QByteArray & ba): QDataStream(ba)
        {
            setByteOrder(QDataStream::LittleEndian);
            setVersion(QDataStream::Qt_5_8);
        }
        
        

        but have errors:
        'staticMetaObject': is not a member of 'QDataStream'
        left of '->metaObject' must point to class/struct/union/generic type
        left of '->dynamicMetaObject' must point to class/struct/union/generic type
        'qt_metacast': is not a member of 'QDataStream'
        'qt_metacall': is not a member of 'QDataStream'

        kshegunovK Offline
        kshegunovK Offline
        kshegunov
        Moderators
        wrote on last edited by
        #2

        @klynxe said in Inheritance QDataStream:

        I try inheritance QDataStream

        Why??

        Read and abide by the Qt Code of Conduct

        1 Reply Last reply
        0
        • ? Offline
          ? Offline
          A Former User
          wrote on last edited by
          #3

          Hi!

          class DPCOQDataStream : public QDataStream
          {
          Q_OBJECT  // <-- bam!
          public:
          

          QDataStream isn't a QObject.

          K 1 Reply Last reply
          3
          • ? A Former User

            Hi!

            class DPCOQDataStream : public QDataStream
            {
            Q_OBJECT  // <-- bam!
            public:
            

            QDataStream isn't a QObject.

            K Offline
            K Offline
            klynxe
            wrote on last edited by
            #4

            @Wieland
            Thank

            @kshegunov
            I use QDataStream in many place and I want default setting to version and byte order

            1 Reply Last reply
            0

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