Q153239: BUG: Multiple CRichEditView::PrintInsideRect’s Are Distorted

Article: Q153239
Product(s): Microsoft C Compiler
Version(s): 4.0,4.1,4.2,5.0,6.0
Operating System(s): 
Keyword(s): kbprint kbMFC kbPrinting kbVC400bug kbVC410bug kbVC420bug kbVC500bug kbVC600bug kbGrpDS
Last Modified: 07-FEB-2002

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

- The Microsoft Foundation Classes (MFC), used with:
   - Microsoft Visual C++, 32-bit Editions, versions 4.0, 4.1 
   - Microsoft Visual C++, 32-bit Enterprise Edition, versions 4.2, 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Professional Edition, versions 4.2, 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
   - Microsoft Visual C++.NET (2002) 
-------------------------------------------------------------------------------

SYMPTOMS
========

When you use CRichEditView::PrintInsideRect() more than once during printing,
the text printed by calls after the first one appears either distorted or
missing in Print Preview mode.

CAUSE
=====

The PrintInsideRect() scales the window extents of the DC before formatting and
printing the requested text to that DC. This scaling is necessary and works for
the first call. However, PrintInsideRect() does not undo the scaling before
returning. Hence, the scaling will be cumulative, causing future prints to be
distorted or scaled out of the visible portion of the DC.

RESOLUTION
==========

Save the DC before calling PrintInsideRect(), and restore it after returning.
Refer to the "Sample Code" section of this article for details.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. We are researching this bug and will post new
information here in the Microsoft Knowledge Base as it becomes available.

Sample Code
-----------

Here is an example of making multiple PrintInsideRect calls per page using
SaveDC() and RestoreDC() to keep the scaling from accumulating:

     void CThatSillyRichEditView::OnPrint(CDC* pDC, CPrintInfo* pInfo)
     {
         // Get the current paper size and construct an actual printing
         // rectangle by leaving out one half inch margin from each side.
         CSize sizePaper = GetPaperSize();
         CRect rectMargins(720, 720, sizePaper.cx - 720, sizePaper.cy - 720);

         // Need to set the margins when printing from CRichEditView
         SetMargins(rectMargins);

         // Set up three rectangular regions spaced an inch apart
         CRect rectHeader(0, 0, rectMargins.right, 1440);
         CRect rectBody(0, 1440, rectMargins.right, 1440 * 2);
         CRect rectFooter(0, 1440 * 2, rectMargins.right, 1440 * 3);

         // Format the first 10 characters in the buffer.
         int nSavedDC = pDC->SaveDC();
         PrintInsideRect(pDC, rectHeader, 0, 10, TRUE); // characters 0-10
         pDC->RestoreDC(nSavedDC);

         // Format the second 10 characters in the buffer.
         nSavedDC = pDC->SaveDC();
         PrintInsideRect(pDC, rectBody, 10, 20, TRUE); // characters 10-20
         pDC->RestoreDC(nSavedDC);

         // Format the third 10 characters in the buffer.
         nSavedDC = pDC->SaveDC();
         PrintInsideRect(pDC, rectFooter, 20, 30, TRUE); // characters 20-30
         pDC->RestoreDC(nSavedDC);
     }

(c) Microsoft Corporation 1999, All Rights Reserved.
Contributions by Jason Strayer, Microsoft Corporation


Additional query words: MfcPrinting

======================================================================
Keywords          : kbprint kbMFC kbPrinting kbVC400bug kbVC410bug kbVC420bug kbVC500bug kbVC600bug kbGrpDSMFCATL 
Technology        : kbAudDeveloper kbMFC
Version           : :4.0,4.1,4.2,5.0,6.0
Issue type        : kbbug
Solution Type     : kbnofix

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

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.

Copyright Microsoft Corporation 1986-2002.