Clean way to keep all private variables in class ( private struct, pimpl idiom )

[atomic]

Hi, I would ask, how you keep private variables in the class? If there are a few then it is not a problem but now I have already over a dozen variables in class and I look for some way to do it more "clean".

Now I use private structure to storage all my private variables, for example

class CustomClass
{ 
    struct Data {
        QTableWidgetItem * hoverItem;
        QLabel label;
        QString text;
        QAction file;
        QAction save;      
        // other variables     
    };
 
public:
    CustomClass();
    ~CustomClass();
 
private:
    Data data;
};

class CustomClass
{ 
    struct Data {
        QTableWidgetItem * hoverItem;
        QLabel label;
        QString text;
        QAction file;
        QAction save;      
        // other variables     
    };

public:
    CustomClass();
    ~CustomClass();
    
private:
    Data data;
};

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I also read about pimpl Idiom
http://qt-project.org/wiki/Dpointer.

How you are doing it in daily work?
Thanks,