Inserting a bitmap file into a CRichEditCtrl

WEBINAR: On-demand webcast

How to Boost Database Development Productivity on Linux, Docker, and Kubernetes with Microsoft SQL Server 2017 REGISTER >

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

  • As all sorts of data becomes available for storage, analysis and retrieval - so called 'Big Data' - there are potentially huge benefits, but equally huge challenges...
  • The agile organization needs knowledge to act on, quickly and effectively. Though many organizations are clamouring for "Big Data", not nearly as many know what to do with it...
  • Cloud-based integration solutions can be confusing. Adding to the confusion are the multiple ways IT departments can deliver such integration...

Most Popular Programming Stories

More for Developers

RSS Feeds

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