DATAOBJ.H

///////////////////////////////////////////////////////////////////////////// 
// dataobj.h : IDataObject Interface to communicate data 
// 
// This is a part of the MMC SDK. 
// Copyright (C) 1997 Microsoft Corporation 
// All rights reserved. 
// 
// This source code is only intended as a supplement to the 
// MMC SDK Reference and related 
// electronic documentation provided with the library. 
// See these sources for detailed information regarding the 
// MMC Library product. 
// 
 
#ifndef __DATAOBJ_H_ 
#define __DATAOBJ_H_ 
 
#include <mmc.h> 
 
// 
// Defines, Types etc... 
// 
 
typedef enum tagCOOKIETYPE 
{ 
  COOKIE_IS_ROOT, 
  COOKIE_IS_STATUS 
 
} COOKIETYPE; 
 
 
class CComponentData;        // Forward declaration 
 
 
///////////////////////////////////////////////////////////////////////////// 
// CDataObject - This class is used to pass data back and forth with MMC. It 
//               uses a standard interface, IDataObject to acomplish this. Refer 
//               to OLE documentation for a description of clipboard formats and 
//               the IdataObject interface. 
 
class CDataObject: 
public IDataObject, 
  public CComObjectRoot 
{ 
public: 
 
// ATL Maps 
DECLARE_NOT_AGGREGATABLE(CDataObject) 
 
BEGIN_COM_MAP(CDataObject) 
COM_INTERFACE_ENTRY(IDataObject) 
END_COM_MAP() 
 
 
  CDataObject(); 
  ~CDataObject(); 
 
  VOID SetCookie(ULONG ulCookie, DATA_OBJECT_TYPES Type, COOKIETYPE ct); 
  
  //  
  // IUnknown overrides 
  // 
 
  STDMETHOD(QueryInterface) (REFIID riid, LPVOID FAR* ppvObj); 
  STDMETHOD_(ULONG, AddRef) (); 
  STDMETHOD_(ULONG, Release) (); 
 
  // 
  // IDataObject implementation methods 
  // 
 
  STDMETHOD(GetDataHere)(FORMATETC *pformatetc, STGMEDIUM *pmedium); 
 
  // Not Implemented 
private: 
  STDMETHOD(GetData)(LPFORMATETC lpFormatetcIn, LPSTGMEDIUM lpMedium) 
  { return E_NOTIMPL; }; 
 
  STDMETHOD(EnumFormatEtc)(DWORD dwDirection, LPENUMFORMATETC* ppEnumFormatEtc) 
  { return E_NOTIMPL; }; 
 
  STDMETHOD(QueryGetData)(LPFORMATETC lpFormatetc)  
  { return E_NOTIMPL; }; 
 
  STDMETHOD(GetCanonicalFormatEtc)(LPFORMATETC lpFormatetcIn, LPFORMATETC lpFormatetcOut) 
  { return E_NOTIMPL; }; 
 
  STDMETHOD(SetData)(LPFORMATETC lpFormatetc, LPSTGMEDIUM lpMedium, BOOL bRelease) 
  { return E_NOTIMPL; }; 
 
  STDMETHOD(DAdvise)(LPFORMATETC lpFormatetc, DWORD advf, LPADVISESINK pAdvSink, LPDWORD pdwConnection) 
  { return E_NOTIMPL; }; 
     
  STDMETHOD(DUnadvise)(DWORD dwConnection) 
  { return E_NOTIMPL; }; 
 
  STDMETHOD(EnumDAdvise)(LPENUMSTATDATA* ppEnumAdvise) 
  { return E_NOTIMPL; }; 
 
  // 
  // Non-interface member functions 
  // 
public: 
  DATA_OBJECT_TYPES  GetContext()    { return m_Context; } 
  COOKIETYPE         GetCookieType() { return m_Type; }  
  ULONG CDataObject::GetCookie()     { return m_ulCookie; } 
 
private: 
  HRESULT  _WriteInternal(IStream *pstm); 
  HRESULT  _WriteDisplayName(IStream *pstm); 
  HRESULT  _WriteNodeType(IStream *pstm); 
  HRESULT  _WriteClsid(IStream *pstm); 
 
  ULONG               m_cRefs;     // object refcount 
  ULONG               m_ulCookie;  // what this obj refers to 
  DATA_OBJECT_TYPES   m_Context;   // context in which this was created 
  COOKIETYPE          m_Type;      // how to interpret _ulCookie 
 
public: 
  // At a minimum we have to implement these clipboard formats 
  // to keep MMC happy. We will ASSERT if we don't 
  static UINT s_cfInternal;       // Our custom clipboard format 
  static UINT s_cfDisplayName; 
  static UINT s_cfNodeType; 
  static UINT s_cfSnapinClsid; 
}; 
 
#endif // __DATAOBJ_H_