Re: CRichEditCtrl contents from RTF file

From:

Goran <goran.pusic@gmail.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Tue, 27 Apr 2010 07:12:06 -0700 (PDT)

Message-ID:

<96fe22f8-5833-4366-a407-d419b4620bb2@12g2000yqi.googlegroups.com>

Whoops! That went out sooner than I wanted... The above worked for
me, regardless of the file size, using unicode in project settings,
and using rtf in two rather distinctive languages.

I don't know why you use OnCreate. It should work, your code, but...
DDX_Control in DoDataExchange is easier.

Other than that, note a canonical form for any non-trivial
OnInitDialog is e.g:

bool CXDialog::OnInitDialog()
{
  CDialog::OnInitDialog();
  TRY
  {
     InitBabyInit();
  }
  CATCH(CException* pe)
  {
    ReportErrorSomehow(pe);
    EndDialog(PROBABLY_ID_CANCEL); // But it's up to you.
  }
}

It's a bad idea to let exception escape your callback (possible due to
use of MFC in it), so you should e.g. do:

struct RichEditStreamInContext
{
  RichEditStreamInContext(const CString& csFileName) :
m_File(csFileName, CFile::modeRead), m_pError(NULL) {}

  CFile m_File;
  CException* m_pError;
};

static DWORD CALLBACK MyStreamInCallback(DWORD_PTR dwCookie, LPBYTE
pbBuff, LONG cb, LONG *pcb)
{
  RichEditStreamInContext& Ctx =
*reinterpret_cast<RichEditStreamInContext*>(dwCookie);
  try
  {
    *pcb = Ctx.m_File.Read(pbBuff, cb);
    return 0;
  }
  catch (CException* p)
  {
    ASSERT(FALSE);
    Ctx.m_pError = p;
    return -1;
  }
}

and in OnInitDialog:

....
RichEditStreamInContext Ctx(RTF_PATH_HERE);
EDITSTREAM es = { (DWORD_PTR)&Ctx, 0, &MyStreamInCallback };
MCALLBACK)MyStreamInCallback;
m_Edit.StreamIn(SF_RTF, es);
if (es.dwError)
  HandleError(Ctx); // Including looking at Ctx.m_pError;

HTH,

Goran.