C / C++ / MFC

charlieg wrote:

For example - suppose I want to format a log message. Beloved printf/sprintf:

sprintf(&buf[0], "Now is the time (%s) for all good %s blah blah.\r\n", GetTime(), "men");

charlieg wrote:

Why would you write a class for doing something like this?

Quote:

sprintf(&buf[0], "Now is the time (%s) for all good %s blah blah.\r\n", GetTime(), "men");

ostringstream oss;
oss << "Now is the time (" << GetTime() << ") for all good " << "men" << " blah blah." << endl;
string buf = oss.str();

ForNow wrote:

For some reason the DrawItem gets called repeatedly unit a stack exception occurs

void CMyStatic::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
    ASSERT(lpDrawItemStruct->CtlType == ODT_STATIC);
    CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
    ASSERT(pDC != NULL);
    pDC->FillSolidRect(&lpDrawItemStruct->rcItem, m_clrBkGnd);
    
    CString str;
    GetWindowText(str);
    if (!str.IsEmpty())
    {
        // Get text format options.
        UINT nFormat = m_nFormat;
        // get actual settings in case they has been changed
        DWORD dwStyle = GetStyle(); 
        // Don't process '&' prefix sequences
        if (dwStyle & SS_NOPREFIX) 
            nFormat |= DT_NOPREFIX;
        // vertically centered text and no new line
        if ((dwStyle & SS_CENTERIMAGE) && str.Find(_T('\n')) < 0)
        {
            nFormat &= ~DT_WORDBREAK;
            nFormat |= DT_VCENTER | DT_SINGLELINE;	// must set both!
        }
        if (dwStyle & SS_ELLIPSISMASK)
        {
            nFormat &= ~DT_EXPANDTABS; // not supported with ellipsis
            switch (dwStyle & SS_ELLIPSISMASK)
            {
                case SS_ENDELLIPSIS : 
                    nFormat |= DT_END_ELLIPSIS | DT_MODIFYSTRING; break;
                case SS_PATHELLIPSIS : 
                    nFormat |= DT_PATH_ELLIPSIS | DT_MODIFYSTRING; break;
                case SS_WORDELLIPSIS : 
                    nFormat |= DT_WORD_ELLIPSIS; break;
            }
        }
        // The complete background has just been filled.
        // So use transparent mode for faster text drawing.
        // Saving and restoring of colors and mode is not necessary (drawing only performed here).
        pDC->SetBkMode(TRANSPARENT);
        pDC->SetTextColor(bDisabled ? ::GetSysColor(COLOR_GRAYTEXT) : m_clrText);
        
        // The text string may be modified if DT_MODIFYSTRING is set!
        LPTSTR lpszText = str.GetBuffer();
        pDC->DrawText(lpszText, -1, &lpDrawItemStruct->rcItem, nFormat);
        str.ReleaseBuffer();
    }
}

CFont l_font;
         LOGFONT lf;
         lf.lfHeight = 12;
         lf.lfWeight = 700;
         strcpy(lf.lfFaceName, "Arial"); // Need a face name "Arial".
         l_font.CreateFontIndirect(&lf);
         CFont* l_old_font = pDC->SelectObject(&l_font);

abendlabel->Create(_T("Abend Label"),WS_CHILD | SS_OWNERDRAW | WS_VISIBLE | WS_CLIPSIBLINGS, CRect(138, 14, 205, 31), this, IDC_ABEND_LABEL);

_tcscpy(lf.lfFaceName, _T("Arial"));

memset(&lf, 0, sizeof(lf));

mylabel->Dump(afxDump);