imagedataobject.cpp

vc++6.0开发网络典型应用实例导航 1. 本光盘提供了本书中所有的实例源程序文件。 2. 附录文件夹下是Winsock 函数参考以及错误码列表

//chucks a bitmap in a richedit control

#include "stdafx.h"
#include "ImageDataObject.h"
#include "ConvEdit.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

void CImageDataObject::InsertBitmap(IRichEditOle* pRichEditOle, CConvEdit *Conv, HBITMAP hBitmap)
{
	SCODE sc;

	CImageDataObject *pods = new CImageDataObject;
	LPDATAOBJECT lpDataObject;
	pods->QueryInterface(IID_IDataObject, (void **)&lpDataObject);

	pods->SetBitmap(hBitmap);

	IOleClientSite *pOleClientSite;	
	pRichEditOle->GetClientSite(&pOleClientSite);

	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);

	IOleObject *pOleObject; 
	pOleObject = pods->GetOleObject(pOleClientSite, pStorage);

	OleSetContainedObject(pOleObject, TRUE);

	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;

	pRichEditOle->InsertObject(&reobject);

	pOleObject->Release();
	pOleClientSite->Release();

	lpLockBytes->Release();

	pStorage->Release();
	lpDataObject->Release();
}

void CImageDataObject::SetBitmap(HBITMAP hBitmap)
{
	ASSERT(hBitmap);

	STGMEDIUM stgm;
	stgm.tymed = TYMED_GDI;
	stgm.hBitmap = hBitmap;
	stgm.pUnkForRelease = NULL;

	FORMATETC fm;
	fm.cfFormat = CF_BITMAP;
	fm.ptd = NULL;
	fm.dwAspect = DVASPECT_CONTENT;
	fm.lindex = -1;
	fm.tymed = TYMED_GDI;

	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;
}