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

  • When individual departments procure cloud service for their own use, they usually don't consider the hazardous organization-wide implications. Read this paper to learn best practices for setting up an internal, IT-based cloud brokerage function that service the entire organization. Find out how this approach enables you to retain top-down visibility and control of network security and manage the impact of cloud traffic on your WAN.

  • As the mobile enterprise marketplace expands and customer needs grow more diverse, Samsung recognizes that solution partners and developers play an essential role by continually innovating to meet their customers' needs. Samsung works to provide these developers and partners with the latest tools and resources needed to create these solutions. Read this program guide to learn how the Samsung Enterprise Alliance Program provides partners and developers with Samsung enterprise software development kits (SDKs) …

Most Popular Programming Stories

More for Developers

RSS Feeds

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