Inserting a bitmap file into a CRichEditCtrl

Here is a way to put a bitmap file into an RTF control. It will insert the file, pWorkSpace->GetWkspTempDirectory() + _T("\\") + plotName, into the CRichEditCtrl m_reportCtrl:

This goes in the ".h" file:


        LPSTORAGE m_lpStorage;  // provides storage for m_lpObject
        LPLOCKBYTES m_lpLockBytes;  // part of implementation of m_lpStorage
        LPOLEOBJECT m_lpObject; // in case you want direct access to the OLE object
        LPVIEWOBJECT2 m_lpViewObject;// IViewObject for IOleObject above

The rest of this goes in the ".cpp" file:


LPUNKNOWN AFXAPI _AfxQueryInterface(LPUNKNOWN lpUnknown, REFIID iid)
{
        ASSERT(lpUnknown != NULL);

        LPUNKNOWN lpW = NULL;
        if (lpUnknown->QueryInterface(iid, (LPLP)&lpW) != S_OK)
                return NULL;

        return lpW;
}

void CSimulationReportView::InsertPlotBitmap()
{
        USES_CONVERSION;
        SCODE sc = ::CreateILockBytesOnHGlobal(NULL, TRUE, &m_lpLockBytes);
        if (sc != S_OK)
                AfxThrowOleException(sc);
        ASSERT(m_lpLockBytes != NULL);

        sc = ::StgCreateDocfileOnILockBytes(m_lpLockBytes,
                STGM_SHARE_EXCLUSIVE|STGM_CREATE|STGM_READWRITE, 0, &m_lpStorage);
        if (sc != S_OK)
        {
                VERIFY(m_lpLockBytes->Release() == 0);
                m_lpLockBytes = NULL;
                AfxThrowOleException(sc);
        }

        CWorkSpace * pWorkSpace = GetDocument()->GetWorkSpace();
    if ( !pWorkSpace )
      return;
        CString plotName;
        plotName.LoadString( IDS_PLOT_FILENAME );
    CString szFileName( pWorkSpace->GetWkspTempDirectory() + 
                                                _T("\\") + plotName );

        // attempt to create the object
        sc = ::OleCreateFromFile(CLSID_NULL, T2COLE(szFileName),
                                                         IID_IUnknown, OLERENDER_DRAW, NULL, NULL, 
                                                         m_lpStorage, (void **)&m_lpObject);
        if ( sc != S_OK )
        {
                TCHAR * lpMsgBuf;
                ::FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | 
                                                 FORMAT_MESSAGE_FROM_SYSTEM, NULL, 
                                                 ::GetLastError(),
                                                 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                                                 (LPTSTR) &lpMsgBuf, 0, NULL );
                CString msg( lpMsgBuf );
                msg += _T("\n\n\nThe following file, created in\n"
                                  "Simulation->Plot, may be missing due\n"
                                  "to not doing a File->Save Workspace:\n\n" );
                msg += szFileName;
                AfxMessageBox( msg, MB_OK );
                ::LocalFree( lpMsgBuf );
                return;
        }
        
        // m_lpObject is currently an IUnknown, convert to IOleObject
        if (m_lpObject != NULL)
        {
                LPUNKNOWN lpUnk = m_lpObject;
                m_lpObject = QUERYINTERFACE(lpUnk, IOleObject);
                lpUnk->Release();
                if (m_lpObject == NULL)
                        AfxThrowOleException(E_OUTOFMEMORY);
        }

        // cache the IViewObject interface
        m_lpViewObject = QUERYINTERFACE(m_lpObject, IViewObject2);
        if (m_lpViewObject == NULL)
                return;

        // setup for advises; we assume that OLE cleans them up properly
        LPADVISESINK lpAdviseSink =
                (LPADVISESINK)GetInterface(&IID_IAdviseSink);

        // set up view advise
        VERIFY(m_lpViewObject->SetAdvise(DVASPECT_CONTENT, 0, lpAdviseSink)
                == S_OK);

        // the server shows these in its user-interface
        //  (as document title and in File Exit menu)
        m_lpObject->SetHostNames(T2COLE(AfxGetAppName()),
                T2COLE(GetDocument()->GetTitle()));

        // all items are "contained" -- this makes our reference to this object
        //  weak -- which is needed for links to embedding silent update.
        OleSetContainedObject(m_lpObject, TRUE);

        CHARRANGE cr;
        m_reportCtrl.GetSel( cr );
        cr.cpMin = cr.cpMax -1;
        m_reportCtrl.SetSel( cr );

        REOBJECT reo;
        memset( &reo, 0, sizeof( reo ) );
        reo.cbStruct = sizeof( reo );
        CLSID classID;
        if ( m_lpObject->GetUserClassID( &classID ) != S_OK)
                classID = CLSID_NULL;
        reo.clsid = classID;
        reo.cp = REO_CP_SELECTION;
        reo.poleobj = m_lpObject;
        reo.pstg = m_lpStorage;
        LPOLECLIENTSITE lpClientSite;
        m_reportCtrl.GetIRichEditOle()->GetClientSite( &lpClientSite );
        reo.polesite = lpClientSite;
        SIZEL sizel;
        sizel.cx = sizel.cy = 0; // let richedit determine initial size
        reo.sizel = sizel;
        reo.dvaspect = DVASPECT_CONTENT;
        reo.dwFlags = REO_RESIZABLE;
        reo.dwUser = 0;
        HRESULT hr = m_reportCtrl.GetIRichEditOle()->InsertObject(&reo);
}


Download demo project - 38 KB

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