popprnt.c

Windows Programming source code

/*----------------------------------------------
   POPPRNT.C -- Popup Editor Printing Functions
  ----------------------------------------------*/

#include <windows.h>
#include <commdlg.h>
#include "resource.h"

BOOL bUserAbort ;
HWND hDlgPrint ;

BOOL CALLBACK PrintDlgProc (HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
     switch (msg)
     {
     case WM_INITDIALOG :
          EnableMenuItem (GetSystemMenu (hDlg, FALSE), SC_CLOSE, MF_GRAYED) ;
          return TRUE ;
          
     case WM_COMMAND :
          bUserAbort = TRUE ;
          EnableWindow (GetParent (hDlg), TRUE) ;
          DestroyWindow (hDlg) ;
          hDlgPrint = NULL ;
          return TRUE ;
     }
     return FALSE ;
}          

BOOL CALLBACK AbortProc (HDC hPrinterDC, int iCode)
{
     MSG msg ;
     
     while (!bUserAbort && PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
     {
          if (!hDlgPrint || !IsDialogMessage (hDlgPrint, &msg))
          {
               TranslateMessage (&msg) ;
               DispatchMessage (&msg) ;
          }
     }
     return !bUserAbort ;
}

BOOL PopPrntPrintFile (HINSTANCE hInst, HWND hwnd, HWND hwndEdit, 
                       PTSTR szTitleName)
{
     static DOCINFO  di = { sizeof (DOCINFO) } ;
     static PRINTDLG pd ;
     BOOL            bSuccess ;
     int             yChar, iCharsPerLine, iLinesPerPage, iTotalLines,
                     iTotalPages, iPage, iLine, iLineNum ;
     PTSTR           pstrBuffer ;
     TCHAR           szJobName [64 + MAX_PATH] ;
     TEXTMETRIC      tm ;
     WORD            iColCopy, iNoiColCopy ;

          // Invoke Print common dialog box
     
     pd.lStructSize         = sizeof (PRINTDLG) ;
     pd.hwndOwner           = hwnd ;
     pd.hDevMode            = NULL ;
     pd.hDevNames           = NULL ;
     pd.hDC                 = NULL ;
     pd.Flags               = PD_ALLPAGES | PD_COLLATE | 
                              PD_RETURNDC | PD_NOSELECTION ;
     pd.nFromPage           = 0 ;
     pd.nToPage             = 0 ;
     pd.nMinPage            = 0 ;
     pd.nMaxPage            = 0 ;
     pd.nCopies             = 1 ;
     pd.hInstance           = NULL ;
     pd.lCustData           = 0L ;
     pd.lpfnPrintHook       = NULL ;
     pd.lpfnSetupHook       = NULL ;
     pd.lpPrintTemplateName = NULL ;
     pd.lpSetupTemplateName = NULL ;
     pd.hPrintTemplate      = NULL ;
     pd.hSetupTemplate      = NULL ;
     
     if (!PrintDlg (&pd))
          return TRUE ;
     
     if (0 == (iTotalLines = SendMessage (hwndEdit, EM_GETLINECOUNT, 0, 0)))
          return TRUE ;

          // Calculate necessary metrics for file 
     
     GetTextMetrics (pd.hDC, &tm) ;
     yChar = tm.tmHeight + tm.tmExternalLeading ;
     
     iCharsPerLine = GetDeviceCaps (pd.hDC, HORZRES) / tm.tmAveCharWidth ;
     iLinesPerPage = GetDeviceCaps (pd.hDC, VERTRES) / yChar ;
     iTotalPages   = (iTotalLines + iLinesPerPage - 1) / iLinesPerPage ;

          // Allocate a buffer for each line of text
     
     pstrBuffer = malloc (sizeof (TCHAR) * (iCharsPerLine + 1)) ;

          // Display the printing dialog box
     
     EnableWindow (hwnd, FALSE) ;
     
     bSuccess   = TRUE ;
     bUserAbort = FALSE ;
     
     hDlgPrint = CreateDialog (hInst, TEXT ("PrintDlgBox"), 
                               hwnd, PrintDlgProc) ;

     SetDlgItemText (hDlgPrint, IDC_FILENAME, szTitleName) ;
     SetAbortProc (pd.hDC, AbortProc) ;

          // Start the document

     GetWindowText (hwnd, szJobName, sizeof (szJobName)) ;
     di.lpszDocName = szJobName ;
     
     if (StartDoc (pd.hDC, &di) > 0)
     {
               // Collation requires this loop and iNoiColCopy

          for (iColCopy = 0 ;
               iColCopy < ((WORD) pd.Flags & PD_COLLATE ? pd.nCopies : 1) ;
               iColCopy++)
          {
               for (iPage = 0 ; iPage < iTotalPages ; iPage++)
               {
                    for (iNoiColCopy = 0 ;
                         iNoiColCopy < (pd.Flags & PD_COLLATE ? 1 : pd.nCopies);
                         iNoiColCopy++)
                    {
                              // Start the page

                         if (StartPage (pd.hDC) < 0)
                         {
                              bSuccess = FALSE ;
                              break ;
                         }

                              // For each page, print the lines
                         
                         for (iLine = 0 ; iLine < iLinesPerPage ; iLine++)
                         {
                              iLineNum = iLinesPerPage * iPage + iLine ;
                              
                              if (iLineNum > iTotalLines)
                                   break ;
                              
                              *(int *) pstrBuffer = iCharsPerLine ;
                              
                              TextOut (pd.hDC, 0, yChar * iLine, pstrBuffer,
                                       (int) SendMessage (hwndEdit, EM_GETLINE,
                                       (WPARAM) iLineNum, (LPARAM) pstrBuffer));
                         }
                         
                         if (EndPage (pd.hDC) < 0)
                         {
                              bSuccess = FALSE ;
                              break ;
                         }
                         
                         if (bUserAbort)
                              break ;
                    }
                    
                    if (!bSuccess || bUserAbort)
                         break ;
               }
               
               if (!bSuccess || bUserAbort)
                    break ;
          }
     }
     else
          bSuccess = FALSE ;
     
     if (bSuccess)
          EndDoc (pd.hDC) ;
     
     if (!bUserAbort)
     {
          EnableWindow (hwnd, TRUE) ;
          DestroyWindow (hDlgPrint) ;
     }
     
     free (pstrBuffer) ;
     DeleteDC (pd.hDC) ;
     
     return bSuccess && !bUserAbort ;
}