Can I define "anonnymous" slots somehow?

[agnus]

Hello, I have this class:

class MyWindow : public QMainWindow {
    Q_OBJECT
 
    public:
    MyWindow();
 
    signals:
    void aspectRatioChange(AspectRatio aspectRatio);
 
    private slots:
    void setAspectRatio(QAction* action);
 
    private:
    struct Impl;
    std::auto_ptr<Impl> imp;
};

class MyWindow : public QMainWindow {
    Q_OBJECT

    public:
    MyWindow();

    signals:
    void aspectRatioChange(AspectRatio aspectRatio);

    private slots:
    void setAspectRatio(QAction* action);

    private:
    struct Impl;
    std::auto_ptr<Impl> imp;
};

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which works alright as it is. I would like to know if I could get rid of that setAspectRatio() private slot somehow by using an "anonymous" function (callback?) in the QObject::connect() statement. My goal is to reduce as much possible the implementation details from my header files.

Thank you