Corretade way to extend a component



  • Hello. I tried to create an inherited component of QLineEdit class. But it is giving error: undefined symbol Link2019 external. I do not know what can be. For I have put my diretrize "include".
    @
    #ifndef MEUCAMPO_H
    #define MEUCAMPO_H

    #include <QLineEdit>
     
    class MeuCampo : public QLineEdit
    {
        Q_OBJECT
    public:
        explicit MeuCampo(QWidget *parent = 0);
     
    signals:
     
    public slots:
     
    };
     
    #endif // MEUCAMPO_H
     
    #include "meucampo.h"
     
    MeuCampo::MeuCampo(QWidget *parent) :
        QLineEdit(parent)
    {
    }
    

    @


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