spaceship.h

VC技术内幕

// Spaceship.h

class CSpaceship;

//----------class declarations-----------------------------------------------
class CSpaceshipFactory : public CSimulatedCmdTarget
{
public:
    CSpaceshipFactory()
        { TRACE("Entering CSpaceshipFactory ctor %p\n", this); }
    ~CSpaceshipFactory()
        { TRACE("Entering CSpaceshipFactory dtor %p\n", this); }
    BOOL ExternalQueryInterface(int lRid, void** ppvObj);
    class XClassFactory : public IClassFactory
    {
    public:
        XClassFactory()
            { TRACE("Entering XClassFactory ctor %p\n", this); }
        virtual BOOL QueryInterface(int lRid, void** ppvObj);
        virtual DWORD Release();
        virtual DWORD AddRef();
        virtual BOOL CreateInstance(int lRid, void** ppvObj);
    } m_xClassFactory;
    friend class XClassFactory;
};

class CSpaceship : public CSimulatedCmdTarget
{
private:
    int m_nPosition; // We can access these from
                     //  all the interfaces
    int m_nAcceleration;
    int m_nColor;
public:
    CSpaceship() {
        TRACE("Entering CSpaceship ctor %p\n", this);
        m_nPosition = 100;
        m_nAcceleration = 101;
        m_nColor = 102;
    }
    ~CSpaceship()
        { TRACE("Entering CSpaceship dtor %p\n", this); }
    BOOL ExternalQueryInterface(int lRid, void** ppvObj);
    class XMotion : public IMotion
    {
    public:
        XMotion()
            { TRACE("Entering XMotion ctor %p\n", this); }
        virtual BOOL QueryInterface(int lRid, void** ppvObj);
        virtual DWORD Release();
        virtual DWORD AddRef();
        virtual void Fly();
        virtual int& GetPosition();
    } m_xMotion;
    
    class XVisual : public IVisual
    {
    public:
        XVisual() {    TRACE("Entering XVisual ctor\n"); }
        virtual BOOL QueryInterface(int lRid, void** ppvObj);
        virtual DWORD Release();
        virtual DWORD AddRef();
        virtual void Display();
    } m_xVisual;

    friend class XVisual;  // These must be at the bottom!
    friend class XMotion;
    friend class CSpaceshipFactory::XClassFactory;
};