www.pudn.com > 200308141526117224仿MSN(网易泡泡)界面.rar > ImageDataObject.h

// ImageDataObject.h: Impementation for IDataObject Interface to be used  
//					     in inserting bitmap to the RichEdit Control. 
// 
// Author : Hani Atassi  (atassi@arabteam2000.com) 
// 
// How to use : Just call the static member InsertBitmap with  
//				the appropriate parrameters.  
// 
// Known bugs : 
// 
// 
////////////////////////////////////////////////////////////////////// 
 
#if !defined(AFX_IMAGEDATAOBJECT_H__7E162227_62B8_49E3_A35B_FEC3F241A78F__INCLUDED_) 
#define AFX_IMAGEDATAOBJECT_H__7E162227_62B8_49E3_A35B_FEC3F241A78F__INCLUDED_ 
 
#if _MSC_VER > 1000 
#pragma once 
#endif // _MSC_VER > 1000 
 
class CImageDataObject : IDataObject 
{ 
public: 
	// This static fumction accepts those parameters: 
	// IRichEditOle* : a pointer to IRochEditOle interface for the RichEdit Control 
	// HBITMAP : the bitmap handle. 
	// 
	// After calling the function, it inserts the image in the current  
	//    position of the RichEdit 
	// 
	static void InsertBitmap(IRichEditOle* pRichEditOle, HBITMAP hBitmap, DWORD dwData = 0); 
 
private: 
	ULONG	m_ulRefCnt; 
	BOOL	m_bRelease; 
 
	// The data being bassed to the richedit 
	// 
	STGMEDIUM m_stgmed; 
	FORMATETC m_fromat; 
 
public: 
	CImageDataObject() : m_ulRefCnt(0) 
	{ 
		m_bRelease = FALSE; 
	} 
 
	~CImageDataObject() 
	{ 
		if (m_bRelease) 
			::ReleaseStgMedium(&m_stgmed); 
	} 
 
	// Methods of the IUnknown interface 
	//  
	STDMETHOD(QueryInterface)(REFIID iid, void ** ppvObject) 
	{ 
		if (iid == IID_IUnknown || iid == IID_IDataObject) 
		{ 
			*ppvObject = this; 
			AddRef(); 
			return S_OK; 
		} 
		else 
			return E_NOINTERFACE; 
	} 
	STDMETHOD_(ULONG, AddRef)(void) 
	{ 
		m_ulRefCnt++; 
		return m_ulRefCnt; 
	} 
	STDMETHOD_(ULONG, Release)(void) 
	{ 
		if (--m_ulRefCnt == 0) 
		{ 
			delete this; 
		} 
 
		return m_ulRefCnt; 
	} 
 
	// Methods of the IDataObject Interface 
	// 
	STDMETHOD(GetData)(FORMATETC *pformatetcIn, STGMEDIUM *pmedium) { 
		HANDLE hDst; 
		hDst = ::OleDuplicateData(m_stgmed.hBitmap, CF_BITMAP, NULL); 
		if (hDst == NULL) 
		{ 
			return E_HANDLE; 
		} 
 
		pmedium->tymed = TYMED_GDI; 
		pmedium->hBitmap = (HBITMAP)hDst; 
		pmedium->pUnkForRelease = NULL; 
 
		return S_OK; 
	} 
	STDMETHOD(GetDataHere)(FORMATETC* pformatetc, STGMEDIUM*  pmedium ) { 
		return E_NOTIMPL; 
	} 
	STDMETHOD(QueryGetData)(FORMATETC*  pformatetc ) { 
		return E_NOTIMPL; 
	} 
	STDMETHOD(GetCanonicalFormatEtc)(FORMATETC*  pformatectIn ,FORMATETC* pformatetcOut ) 	{ 
		return E_NOTIMPL; 
	} 
	STDMETHOD(SetData)(FORMATETC* pformatetc , STGMEDIUM*  pmedium , BOOL  fRelease ) { 
		m_fromat = *pformatetc; 
		m_stgmed = *pmedium; 
 
		return S_OK; 
	} 
	STDMETHOD(EnumFormatEtc)(DWORD  dwDirection , IEnumFORMATETC**  ppenumFormatEtc ) { 
		return E_NOTIMPL; 
	} 
	STDMETHOD(DAdvise)(FORMATETC *pformatetc, DWORD advf, IAdviseSink *pAdvSink, 
		DWORD *pdwConnection) { 
		return E_NOTIMPL; 
	} 
	STDMETHOD(DUnadvise)(DWORD dwConnection) { 
		return E_NOTIMPL; 
	} 
	STDMETHOD(EnumDAdvise)(IEnumSTATDATA **ppenumAdvise) { 
		return E_NOTIMPL; 
	} 
 
	// Some Other helper functions 
	// 
	void SetBitmap(HBITMAP hBitmap); 
	IOleObject *GetOleObject(IOleClientSite *pOleClientSite, IStorage *pStorage); 
 
}; 
 
#endif // !defined(AFX_IMAGEDATAOBJECT_H__7E162227_62B8_49E3_A35B_FEC3F241A78F__INCLUDED_)