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

History



Comments

  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • You may not realize the complexity you could be creating when developing mobile apps – many companies don't initially. You could be doubling your IT costs for development and delivery; not to mention, risking sales, productivity and brand satisfaction. Read this IBM-commissioned Forrester Study to understand the key cost drivers of mobile app delivery -- for both customer-facing and enterprise applications. Find out how you could lower costs and increase success with the right strategy and investment.

  • Several technologies are driving big changes at federal agencies, but at the forefront is cloud computing. Cloud -- the use of remote, Internet-hosted servers for storing, managing and processing data in place of on-site technology -- is helping along technologies such as those related to collaboration and enabling new ones, such as the analysis of Big Data. Cloud is complicated but also growing in importance at federal agencies. Read this technology article to learn how governmental entities are creating a …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date