KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q173249: FIX: Print Preview Doesn’t Honor Font Width Setting

Article: Q173249
Product(s): Microsoft C Compiler
Version(s): winnt:2.0,2.1,2.2,4.0,4.1,4.2,5.0
Operating System(s): 
Keyword(s): kbDocView kbMFC KbUIDesign kbVC200bug kbVC210bug kbVC220bug kbVC400bug kbVC410bug kbVC4
Last Modified: 17-JUL-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- The Microsoft Foundation Classes (MFC), used with:
   - Microsoft Visual C++, 32-bit Editions, versions 2.0, 2.1, 2.2, 4.0, 4.1 
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 4.2 
   - Microsoft Visual C++, 32-bit Professional Edition, version 4.2 
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0 
   - Microsoft Visual C++, 32-bit Professional Edition, version 5.0 
   - Microsoft Visual C++ for Windows, 16-bit edition, version 1.52 
-------------------------------------------------------------------------------

SYMPTOMS
========

MFC has a Print Preview feature that shows you on the screen what your document
should look like when it is printed. However, if you use a font with a non-zero
width in your OnDraw routine to make the text appear "condensed" or "squished",
then the preview MFC shows you on the screen does not appear as the document
will look when it is actually printed.

CAUSE
=====

A bug in the MFC CPreviewDC::MirrorFont forces a zero value for the font width
which causes a normal-looking font to be used in the Print Preview.

RESOLUTION
==========

Insert an exact copy of the MFC function into one of your project source files
and make the needed corrections. A linker option override will force it to use
your corrected version of the function and ignore MFC's function.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This problem was corrected in Visual C++ version 6.0.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

     void CFntWidthView::OnDraw(CDC* pDC)
     {
        pDC->SetMapMode(MM_LOENGLISH);

        LOGFONT lfFont;
        CFont fontNew, *fontOld;
        ZeroMemory(&lfFont, sizeof(lfFont));
        lstrcpy(lfFont.lfFaceName, "Arial");
        lfFont.lfWidth = 10;
        lfFont.lfHeight = 50;
        fontNew.CreateFontIndirect(&lfFont);

        fontOld = pDC->SelectObject(&fontNew);
        pDC->TextOut(0, -100, "Font Width lfWidth = 10.", 24);
        pDC->SelectObject(fontOld);
     }

Steps to Workaround
-------------------

You can work around the problem only for projects statically linked to MFC. The
workaround uses the linker /FORCE:MULTIPLE option to override MFC's version of
CPreviewDC::MirrorFont with your corrected version. Follow the steps below to
work around this problem:

1. Insert the following statements at the very end of one of your source files:

        #include "afxpriv.h"
        void AFXAPI AfxDeleteObject(HGDIOBJ* pObject);

2. Locate MFC's CPreviewDC::MirrorFont function (in source file dcprev.cpp) and
  copy the entire function just after the statements listed above.

3. Make the following corrections to the function:

Change:

  logFont.lfWidth = 0;

To:

  logFont.lfWidth = tm.tmAveCharWidth;

4. From the Build menu, click Settings, and on the General tab, select "Use MFC
  in a static library" in the Microsoft Foundation Classes drop-down box.

5. Click the Project Settings Link tab. In the Category drop-down box, select
  Customize and make sure the "Force file output" option is set.

6. Rebuild your application. When you rebuild, you will get three warnings that
  can be ignored:

  

    LINK : warning LNK4075: ignoring /INCREMENTAL due to /FORCE
      specification

  

    nafxcwd.lib(dcprev.obj) : warning LNK4006: "protected: void __thiscall
      CPreviewDC::MirrorFont(void)"(?MirrorFont@CPreviewDC@@IAEXXZ)
      already defined in FntWidthView.obj; second definition ignored

  

    Debug/FntWidth.exe : warning LNK4088: image being generated due to
      /FORCE option; image may not run

Now your application should behave correctly. The force option causes the linker
to ignore MFC's version of the function and to use your function instead.

For dynamically linked projects, there are no good workarounds other than
avoiding custom-width fonts.

Additional query words:

======================================================================
Keywords          : kbDocView kbMFC KbUIDesign kbVC200bug kbVC210bug kbVC220bug kbVC400bug kbVC410bug kbVC420bug kbVC500bug kbVC600fix kbGrpDSMFCATL kbNoUpdate 
Technology        : kbAudDeveloper kbMFC
Version           : winnt:2.0,2.1,2.2,4.0,4.1,4.2,5.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.