Article: Q145696
Product(s): Microsoft C Compiler
Version(s): 4.0
Operating System(s):
Keyword(s): kbcode kbDocView kbFont kbGDI kbMFC kbVC400bug kbVC410fix kbNoUpdate
Last Modified: 20-OCT-2001
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The information in this article applies to:
- The Microsoft Foundation Classes (MFC), used with:
- Microsoft Visual C++, 32-bit Editions, version 4.0
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SYMPTOMS
========
Calling CDC::CreatePointFont() results in a font that is not of the point size
requested. This will occur when the y component of the DC's viewport origin is
not at 0. A common place for this to occur would be in a CScrollView class where
the user has scrolled the view vertically.
CAUSE
=====
MFC uses DPtoLP() to map the given device coordinates to logical coordinates.
The case where the viewport origin is not at 0 is not taken into consideration
by this code.
RESOLUTION
==========
Set the y component of the viewport origin to 0 before calling
CreatePointFont(). The following code demonstrates the workaround. Here pDC is a
pointer to a CDC.
Sample Code
-----------
/* Compile options needed: default
*/
POINT pt;
SetViewportOrgEx(pDC->GetSafeHdc(), 0, 0, &pt); // set origin to 0,0
CreatePointFont(120, "Courier", pDC);
SetViewportOrgEx(pDC->GetSafeHdc(), pt.x, pt,y, NULL); // restore origin
STATUS
======
Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This bug was corrected in Visual C++ 4.1.
Additional query words: kbVC400bug 4.10 4.00
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Keywords : kbcode kbDocView kbFont kbGDI kbMFC kbVC400bug kbVC410fix kbNoUpdate
Technology : kbAudDeveloper kbMFC
Version : :4.0
Issue type : kbbug
Solution Type : kbfix
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