Advanced MFC Programming

Chapter 9. Font
int CALLBACK EnumFontProc
(
LPLOGFONT lplf,
LPNEWTEXTMETRIC lpntm,
DWORD FontType,
LPVOID pLfArray
)
{
static int nRaster=0;
static int nVector=0;
static int nTrueType=0;
}
LPLOGFONT *lpLogFont=(LPLOGFONT *)pLfArray;
if(FontType & RASTER_FONTTYPE)
{
memcpy((*lpLogFont+nRaster), lplf, sizeof(LOGFONT));
nRaster++;
}
else if(FontType & TRUETYPE_FONTTYPE)
{
memcpy((*(lpLogFont+2)+nTrueType), lplf, sizeof(LOGFONT));
nTrueType++;
}
else
{
memcpy((*(lpLogFont+1)+nVector), lplf, sizeof(LOGFONT));
nVector++;
}
return TRUE;
Three static variables are declared here to act as the counters for each type of fonts. When this function
is called, the information of the font is copied from lplf to the buffers allocated in CGDIView::
OnInitialUpdate(), whose address is passed through user-defined parameter.
In function CGDIView::OnInitialUpdate(), after the font families are enumerated, we need to allocate
enough memory, implement the enumeration again for every single type of font:
void CGDIView::OnInitialUpdate()
{
CClientDC dc(this);
CScrollView::OnInitialUpdate();
CSize sizeTotal=CSize(100, 80);
int i;
CFont *ptrFont;
ASSERT(dc.GetSafeHdc());
::EnumFontFamilies
(
dc.GetSafeHdc(),
(LPCTSTR)NULL,
(FONTENUMPROC)EnumFontFamProc,
(LPARAM)m_nFontCount
);
if(m_nFontCount[0] != 0)
{
m_lpLf[0]=(LPLOGFONT) new BYTE[sizeof(LOGFONT)*m_nFontCount[0]];
}
if(m_nFontCount[1] != 0)
{
m_lpLf[1]=(LPLOGFONT) new BYTE[sizeof(LOGFONT)*m_nFontCount[1]];
}
if(m_nFontCount[2] != 0)
{
m_lpLf[2]=(LPLOGFONT) new BYTE[sizeof(LOGFONT)*m_nFontCount[2]];
}
::EnumFontFamilies
(
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