poppad.c

有关C语言的控制打印机的程序

/*---------------------------------------
   POPPAD.C -- Popup Editor
               (c) Charles Petzold, 1996
  ---------------------------------------*/

#include <windows.h>
#include <commdlg.h>
#include <stdlib.h>
#include "poppad.h"

#define EDITID   1
#define UNTITLED "(untitled)"

LRESULT CALLBACK WndProc      (HWND, UINT, WPARAM, LPARAM) ;
BOOL    CALLBACK AboutDlgProc (HWND, UINT, WPARAM, LPARAM) ;

          // Functions in POPFILE.C

void PopFileInitialize (HWND) ;
BOOL PopFileOpenDlg    (HWND, PSTR, PSTR) ;
BOOL PopFileSaveDlg    (HWND, PSTR, PSTR) ;
BOOL PopFileRead       (HWND, PSTR) ;
BOOL PopFileWrite      (HWND, PSTR) ;

          // Functions in POPFIND.C

HWND PopFindFindDlg     (HWND) ;
HWND PopFindReplaceDlg  (HWND) ;
BOOL PopFindFindText    (HWND, int *, LPFINDREPLACE) ;
BOOL PopFindReplaceText (HWND, int *, LPFINDREPLACE) ;
BOOL PopFindNextText    (HWND, int *) ;
BOOL PopFindValidFind   (void) ;

          // Functions in POPFONT.C

void PopFontInitialize   (HWND) ;
BOOL PopFontChooseFont   (HWND) ;
void PopFontSetFont      (HWND) ;
void PopFontDeinitialize (void) ;

          // Functions in POPPRNT.C

BOOL PopPrntPrintFile (HINSTANCE, HWND, HWND, PSTR) ;

          // Global variables

static char szAppName[] = "PopPad" ;
static HWND hDlgModeless ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
     {
     MSG        msg ;
     HWND       hwnd ;
     HACCEL     hAccel ;
     WNDCLASSEX wndclass ;

     wndclass.cbSize        = sizeof (wndclass) ;
     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (hInstance, szAppName) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass.lpszMenuName  = szAppName ;
     wndclass.lpszClassName = szAppName ;
     wndclass.hIconSm       = LoadIcon (hInstance, szAppName) ;

     RegisterClassEx (&wndclass) ;

     hwnd = CreateWindow (szAppName, NULL,
                          WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          NULL, NULL, hInstance, szCmdLine) ;

     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ; 

     hAccel = LoadAccelerators (hInstance, szAppName) ;

     while (GetMessage (&msg, NULL, 0, 0))
          {
          if (hDlgModeless == NULL || !IsDialogMessage (hDlgModeless, &msg))
               {
               if (!TranslateAccelerator (hwnd, hAccel, &msg))
                    {
                    TranslateMessage (&msg) ;
                    DispatchMessage (&msg) ;
                    }
               }
          }
     return msg.wParam ;
     }

void DoCaption (HWND hwnd, char *szTitleName)
     {
     char szCaption[64 + _MAX_FNAME + _MAX_EXT] ;

     wsprintf (szCaption, "%s - %s", szAppName,
               szTitleName[0] ? szTitleName : UNTITLED) ;

     SetWindowText (hwnd, szCaption) ;
     }

void OkMessage (HWND hwnd, char *szMessage, char *szTitleName)
     {
     char szBuffer[64 + _MAX_FNAME + _MAX_EXT] ;

     wsprintf (szBuffer, szMessage, szTitleName[0] ? szTitleName : UNTITLED) ;

     MessageBox (hwnd, szBuffer, szAppName, MB_OK | MB_ICONEXCLAMATION) ;
     }

short AskAboutSave (HWND hwnd, char *szTitleName)
     {
     char szBuffer[64 + _MAX_FNAME + _MAX_EXT] ;
     int  iReturn ;

     wsprintf (szBuffer, "Save current changes in %s?",
               szTitleName[0] ? szTitleName : UNTITLED) ;

     iReturn = MessageBox (hwnd, szBuffer, szAppName,
                           MB_YESNOCANCEL | MB_ICONQUESTION) ;

     if (iReturn == IDYES)
          if (!SendMessage (hwnd, WM_COMMAND, IDM_SAVE, 0L))
               iReturn = IDCANCEL ;

     return iReturn ;
     }

LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
     {
     static BOOL      bNeedSave = FALSE ;
     static char      szFileName[_MAX_PATH] ;
     static char      szTitleName[_MAX_FNAME + _MAX_EXT] ;
     static HINSTANCE hInst ;
     static HWND      hwndEdit ;
     static int       iOffset ;
     static UINT      iMsgFindReplace ;
     int              iSelBeg, iSelEnd, iEnable ;
     LPFINDREPLACE    pfr ;

     switch (iMsg)
          {
          case WM_CREATE :
               hInst = ((LPCREATESTRUCT) lParam) -> hInstance ;

                         // Create the edit control child window

               hwndEdit = CreateWindow ("edit", NULL,
                         WS_CHILD | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL |
                              WS_BORDER | ES_LEFT | ES_MULTILINE |
                              ES_NOHIDESEL | ES_AUTOHSCROLL | ES_AUTOVSCROLL,
                         0, 0, 0, 0,
                         hwnd, (HMENU) EDITID, hInst, NULL) ;

               SendMessage (hwndEdit, EM_LIMITTEXT, 32000, 0L) ;

                         // Initialize common dialog box stuff

               PopFileInitialize (hwnd) ;
               PopFontInitialize (hwndEdit) ;

               iMsgFindReplace = RegisterWindowMessage (FINDMSGSTRING) ;

                         // Process command line

               lstrcpy (szFileName, (PSTR)
                        (((LPCREATESTRUCT) lParam)->lpCreateParams)) ;

               if (strlen (szFileName) > 0)
                    {
                    GetFileTitle (szFileName, szTitleName,
                                  sizeof (szTitleName)) ;

                    if (!PopFileRead (hwndEdit, szFileName))
                         OkMessage (hwnd, "File %s cannot be read!",
                                          szTitleName) ;
                    }

               DoCaption (hwnd, szTitleName) ;
               return 0 ;

          case WM_SETFOCUS :
               SetFocus (hwndEdit) ;
               return 0 ;

          case WM_SIZE : 
               MoveWindow (hwndEdit, 0, 0, LOWORD (lParam),
                                           HIWORD (lParam), TRUE) ;
               return 0 ;

          case WM_INITMENUPOPUP :
               switch (lParam)
                    {
                    case 1 :        // Edit menu

                              // Enable Undo if edit control can do it

                         EnableMenuItem ((HMENU) wParam, IDM_UNDO,
                              SendMessage (hwndEdit, EM_CANUNDO, 0, 0L) ?
                                   MF_ENABLED : MF_GRAYED) ;

                              // Enable Paste if text is in the clipboard

                         EnableMenuItem ((HMENU) wParam, IDM_PASTE,
                              IsClipboardFormatAvailable (CF_TEXT) ?
                                   MF_ENABLED : MF_GRAYED) ;

                              // Enable Cut, Copy, and Del if text is selected

                         SendMessage (hwndEdit, EM_GETSEL, (WPARAM) &iSelBeg,
                                                           (LPARAM) &iSelEnd) ;

                         iEnable = iSelBeg != iSelEnd ? MF_ENABLED : MF_GRAYED ;

                         EnableMenuItem ((HMENU) wParam, IDM_CUT,   iEnable) ;
                         EnableMenuItem ((HMENU) wParam, IDM_COPY,  iEnable) ;
                         EnableMenuItem ((HMENU) wParam, IDM_CLEAR, iEnable) ;
                         break ;

                    case 2 :        // Search menu

                              // Enable Find, Next, and Replace if modeless
                              //   dialogs are not already active

                         iEnable = hDlgModeless == NULL ?
                                        MF_ENABLED : MF_GRAYED ;

                         EnableMenuItem ((HMENU) wParam, IDM_FIND,    iEnable) ;
                         EnableMenuItem ((HMENU) wParam, IDM_NEXT,    iEnable) ;
                         EnableMenuItem ((HMENU) wParam, IDM_REPLACE, iEnable) ;
                         break ;