How to connect?

[starlon]

How do I connect these slots and signals? The document I got the code from never explained that part, and so far I just crash my program trying.

class ClipboardInterface
    {
    public:
        virtual void cut() = 0;
        virtual void copy() const = 0;
        virtual void paste() = 0;
    };
 
    class ClipboardEvents
    {
    public:
        virtual void copyAvailableChange(bool available) = 0;
        virtual void pasteAvailableChange(bool available) = 0;
    };
 
    class ClipboardWrapper : public QObject,
                             public ClipboardInterface,
                             public ClipboardEvents
    {
        Q_OBJECT
 
    public:
        ClipboardWrapper(QObject *parent);
 
    public slots:
        void cut() { wrappedObject->cut(); }
        void copy() const { wrappedObject->copy(); }
        void paste() { wrappedObject->paste(); }
 
    signals:
        void copyAvailableChange(bool available);
        void pasteAvailableChange(bool available);
 
    private:
        ClipboardInterface *wrappedObject;
    };
 
    class CustomWidget : public QWidget,
                         public ClipboardInterface
    {
        Q_OBJECT
 
    public:
        CustomWidget(QWidget *parent = 0);
 
        void cut();
        void copy() const;
        void paste();
 
    private:
        ClipboardWrapper *wrapper;
    };

class ClipboardInterface
    {
    public:
        virtual void cut() = 0;
        virtual void copy() const = 0;
        virtual void paste() = 0;
    };

    class ClipboardEvents
    {
    public:
        virtual void copyAvailableChange(bool available) = 0;
        virtual void pasteAvailableChange(bool available) = 0;
    };
    
    class ClipboardWrapper : public QObject,
                             public ClipboardInterface,
                             public ClipboardEvents
    {
        Q_OBJECT
    
    public:
        ClipboardWrapper(QObject *parent);
    
    public slots:
        void cut() { wrappedObject->cut(); }
        void copy() const { wrappedObject->copy(); }
        void paste() { wrappedObject->paste(); }
    
    signals:
        void copyAvailableChange(bool available);
        void pasteAvailableChange(bool available);
    
    private:
        ClipboardInterface *wrappedObject;
    };

    class CustomWidget : public QWidget,
                         public ClipboardInterface
    {
        Q_OBJECT
    
    public:
        CustomWidget(QWidget *parent = 0);
    
        void cut();
        void copy() const;
        void paste();
    
    private:
        ClipboardWrapper *wrapper;
    };

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[squidge]

http://doc.trolltech.com/4.5/qobject.html#connect