46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
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#ifndef __IPSTG_H__
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#define __IPSTG_H__
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//
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// CImpIPersistStorage works very well along-side an IPersistStreamInit
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// implementation.
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//
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// IE30's CShellEmbedding implemented this interface because it was
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// an embedding must-have. But none of our objects were marked as
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// embeddable, so we really didn't need it.
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//
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// I pulled the implementation to a new class that can easily be
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// included into any object that needs an IPersistStorange implementation
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// that delegates to the object's IPersistStreamInit implementation.
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//
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class CImpIPersistStorage : public IPersistStorage
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{
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public:
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// *** IUnknown ***
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virtual STDMETHODIMP QueryInterface(REFIID riid, LPVOID * ppvObj) PURE;
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virtual STDMETHODIMP_(ULONG) AddRef(void) PURE;
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virtual STDMETHODIMP_(ULONG) Release(void) PURE;
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// *** IPersist ***
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virtual STDMETHODIMP GetClassID(CLSID *pClassID) PURE;
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// *** IPersistStorage ***
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virtual STDMETHODIMP IsDirty(void) PURE; // matches IPersistStreamInit
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virtual STDMETHODIMP InitNew(IStorage *pStg);
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virtual STDMETHODIMP Load(IStorage *pStg);
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virtual STDMETHODIMP Save(IStorage *pStgSave, BOOL fSameAsLoad);
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virtual STDMETHODIMP SaveCompleted(IStorage *pStgNew);
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virtual STDMETHODIMP HandsOffStorage(void);
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// These happen to match IPersistStreamInit methods.
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// They should update the dirty state of the object as
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// returned from IsDirty().
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//
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virtual STDMETHODIMP Load(IStream *pStm) PURE;
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virtual STDMETHODIMP Save(IStream *pStm, BOOL fClearDirty) PURE;
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virtual STDMETHODIMP InitNew(void) PURE;
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};
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#endif // __IPSTG_H__
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