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

// 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 : 
// 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "ImageDataObject.h" 
 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
 
////////////////////////////////////////////////////////////////////// 
// Static member functions 
////////////////////////////////////////////////////////////////////// 
 
void CImageDataObject::InsertBitmap(IRichEditOle* pRichEditOle, HBITMAP hBitmap, DWORD dwData) 
{ 
	SCODE sc; 
 
	// Get the image data object 
	// 
	CImageDataObject *pods = new CImageDataObject; 
	LPDATAOBJECT lpDataObject; 
	pods->QueryInterface(IID_IDataObject, (void **)&lpDataObject); 
 
	pods->SetBitmap(hBitmap); 
 
	// Get the RichEdit container site 
	// 
	IOleClientSite *pOleClientSite;	 
	pRichEditOle->GetClientSite(&pOleClientSite); 
 
	// Initialize a Storage Object 
	// 
	IStorage *pStorage;	 
 
	LPLOCKBYTES lpLockBytes = NULL; 
	sc = ::CreateILockBytesOnHGlobal(NULL, TRUE, &lpLockBytes); 
	if (sc != S_OK) 
		AfxThrowOleException(sc); 
	ASSERT(lpLockBytes != NULL); 
	 
	sc = ::StgCreateDocfileOnILockBytes(lpLockBytes, 
		STGM_SHARE_EXCLUSIVE|STGM_CREATE|STGM_READWRITE, 0, &pStorage); 
	if (sc != S_OK) 
	{ 
		VERIFY(lpLockBytes->Release() == 0); 
		lpLockBytes = NULL; 
		AfxThrowOleException(sc); 
	} 
	ASSERT(pStorage != NULL); 
 
	// The final ole object which will be inserted in the richedit control 
	// 
	IOleObject *pOleObject;  
	pOleObject = pods->GetOleObject(pOleClientSite, pStorage); 
 
	// all items are "contained" -- this makes our reference to this object 
	//  weak -- which is needed for links to embedding silent update. 
	OleSetContainedObject(pOleObject, TRUE); 
 
	// Now Add the object to the RichEdit  
	// 
	REOBJECT reobject; 
	ZeroMemory(&reobject, sizeof(REOBJECT)); 
	reobject.cbStruct = sizeof(REOBJECT); 
	 
	CLSID clsid; 
	sc = pOleObject->GetUserClassID(&clsid); 
	if (sc != S_OK) 
		AfxThrowOleException(sc); 
 
	reobject.clsid = clsid; 
	reobject.cp = REO_CP_SELECTION; 
	reobject.dvaspect = DVASPECT_CONTENT; 
	reobject.poleobj = pOleObject; 
	reobject.polesite = pOleClientSite; 
	reobject.pstg = pStorage; 
	reobject.dwUser = dwData; 
 
	// Insert the bitmap at the current location in the richedit control 
	// 
	pRichEditOle->InsertObject(&reobject); 
 
	// Release all unnecessary interfaces 
	// 
	pOleObject->Release(); 
	pOleClientSite->Release(); 
	pStorage->Release(); 
	lpDataObject->Release(); 
} 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
 
void CImageDataObject::SetBitmap(HBITMAP hBitmap) 
{ 
	ASSERT(hBitmap); 
 
	STGMEDIUM stgm; 
	stgm.tymed = TYMED_GDI;					// Storage medium = HBITMAP handle		 
	stgm.hBitmap = hBitmap; 
	stgm.pUnkForRelease = NULL;				// Use ReleaseStgMedium 
 
	FORMATETC fm; 
	fm.cfFormat = CF_BITMAP;				// Clipboard format = CF_BITMAP 
	fm.ptd = NULL;							// Target Device = Screen 
	fm.dwAspect = DVASPECT_CONTENT;			// Level of detail = Full content 
	fm.lindex = -1;							// Index = Not applicaple 
	fm.tymed = TYMED_GDI;					// Storage medium = HBITMAP handle 
 
	this->SetData(&fm, &stgm, TRUE);		 
} 
 
IOleObject *CImageDataObject::GetOleObject(IOleClientSite *pOleClientSite, IStorage *pStorage) 
{ 
	ASSERT(m_stgmed.hBitmap); 
 
	SCODE sc; 
	IOleObject *pOleObject; 
	sc = ::OleCreateStaticFromData(this, IID_IOleObject, OLERENDER_FORMAT,  
			&m_fromat, pOleClientSite, pStorage, (void **)&pOleObject); 
	if (sc != S_OK) 
		AfxThrowOleException(sc); 
	return pOleObject; 
}