Q133275: HOWTO: Print from a Class Other Than CView

Article: Q133275
Product(s): Microsoft C Compiler
Version(s): winnt:1.0,2.0,2.1,4.0,4.1
Operating System(s): 
Keyword(s): kbcode kbProgramming kbprint kbMFC kbPrinting kbVC kbVC150 kbVC200 kbVC400 kbVC410 kbGr
Last Modified: 11-SEP-2001

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The information in this article applies to:

- The Microsoft Foundation Classes (MFC), used with:
   - Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5, 1.51, 1.52 
   - Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 2.1, 4.0, 4.1 
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SUMMARY
=======

The standard method to support printing capability in an MFC application is to
override the OnDraw(CDC* pDC) member function of the CView class that provides
the pointer to the device context (pDC). If the application does not possess a
CView class (for example, a dialog-based application), you can use the code
listed in this article to obtain a pointer to the printing device context to
implement printing.

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

In this example, CMyDialog is publicly derived from CDialog, OnPrintBuf() is a
message handler that is mapped to BN_CLICKED, and SetPrintAlign() is used to
select print settings specified to an application. The sample code prints the
contents of the 'pbuf' buffer.

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

     void CMyDialog::OnPrintBuf()
         {
         char   pbuf[100] = "Hello World.";
         HDC    hdcPrn ;

         // Instantiate a CPrintDialog.
         CPrintDialog *printDlg =
             new CPrintDialog(FALSE, PD_ALLPAGES | PD_RETURNDC, NULL);

         // Initialize some of the fields in PRINTDLG structure.
         printDlg->m_pd.nMinPage = printDlg->m_pd.nMaxPage = 1;
         printDlg->m_pd.nFromPage = printDlg->m_pd.nToPage = 1;

         // Display Windows print dialog box.
         printDlg->DoModal();

         // Obtain a handle to the device context.
         hdcPrn = printDlg->GetPrinterDC();
         if (hdcPrn != NULL)
             {
             CDC *pDC = new CDC;
             pDC->Attach (hdcPrn);      // attach a printer DC

             pDC->StartDoc("test");  // begin a new print job
                                     // for Win32 use
                                     // CDC::StartDoc(LPDOCINFO) override

             pDC->StartPage();          // begin a new page
             SetPrintAlign(pDC, hdcPrn);// set the printing alignment
             pDC->TextOut(10, 10, pbuf);// write the string in pbuf
             pDC->EndPage();            // end a page

             pDC->EndDoc();             // end a print job

             pDC->Detach();             // detach the printer DC
             delete pDC;
             }

         delete printDlg;
         }

     void CMyDialog::SetPrintAlign(CDC *pDC, HDC hdcPrn)
         {
         short cxPage, cyPage;

         cxPage = ::GetDeviceCaps (hdcPrn, HORZRES) ;
         cyPage = ::GetDeviceCaps (hdcPrn, VERTRES) ;
         pDC->SetMapMode (MM_ISOTROPIC) ;
         pDC->SetWindowExt ( 1000, 1000) ;
         pDC->SetViewportExt (cxPage / 2, -cyPage / 2) ;
         pDC->SetViewportOrg (cxPage / 2,  cyPage / 2) ;
         pDC->SetTextAlign (TA_BASELINE | TA_CENTER) ;
         }

REFERENCES
==========

For more information about the MFC printing, please see "Programming with the
Microsoft Foundation Class Library" in Books Online.

Additional query words: 2.52 3.0 3.00 3.1 3.10

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Keywords          : kbcode kbProgramming kbprint kbMFC kbPrinting kbVC kbVC150 kbVC200 kbVC400 kbVC410 kbGrpDSMFCATL 
Technology        : kbAudDeveloper kbMFC
Version           : winnt:1.0,2.0,2.1,4.0,4.1
Issue type        : kbhowto

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