wndproc.c

有关zip的一个开发实例。主要包括图片和程序源代码。

               hPatternSelectDlg =
               CreateDialog(hInst, "PATTERN", hWnd, lpfnPatternSelect);
               WinAssert(hPatternSelectDlg);
               }
            break;

         case IDM_CLEAR_STATUS:  /* forward to status window */
            SendMessage(hWndEdit, WM_COMMAND, IDM_CLEAR_STATUS, 0L);
            break;

         case IDM_EDIT_SAVE_AS:
            {
            OFSTRUCT ofs;
            char szFilename[PATH_MAX] = "";
            char *p;
#ifdef WIN32
            DWORD bytes_written;
            HANDLE hFile;
#else
            HFILE hFile;
#endif

            memset(&ofnTemp, 0, sizeof (ofnTemp));
            memset(&ofs, 0, sizeof(ofs));
            GetWindowText(hWndStatic, szFilename, PATH_MAX);
            for (p = szFilename; *p; p++)
               if (*p == '/')
                  *p = '\\';
            ofnTemp.lStructSize = sizeof (ofnTemp);
            ofnTemp.hwndOwner = hWndMain;
            ofnTemp.hInstance = hInst;
            ofnTemp.lpstrFilter = "All Files (*.*)\0*.*\0\0";
            ofnTemp.nFilterIndex = 1;
            ofnTemp.lpstrFile = szFilename;
            ofnTemp.nMaxFile = PATH_MAX;
            ofnTemp.lpstrInitialDir = NULL;
            ofnTemp.Flags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT;

             if (GetSaveFileName (&ofnTemp))
               {
               unsigned int txtlen;
               txtlen = (unsigned int)SendMessage(hWndEdit, WM_GETTEXTLENGTH, 0, 0);
               if (txtlen != 0)
                  txtlen++;
               SendMessage(hWndEdit, WM_GETTEXT, txtlen, (LPARAM)pszBuffer);
#ifndef WIN32
               hFile = OpenFile(szFilename, &ofs, OF_CREATE);
               _lwrite (hFile, pszBuffer, lstrlen(pszBuffer));
               _lclose (hFile);
#else
               hFile = CreateFile(szFilename, GENERIC_WRITE, 0, NULL,
                  CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
               WriteFile(hFile, pszBuffer, lstrlen(pszBuffer), &bytes_written,NULL);
               CloseHandle(hFile);
#endif
               SetWindowText(hWndStatic, szFilename);
               }
            }
            break;

         case IDM_EDIT_OPEN_FILE:
            {
            OFSTRUCT ofs;
            char szFilename[PATH_MAX] = "";
#ifdef WIN32
            DWORD bytes_written, dwSize;
            HANDLE hFile;
#else
            HFILE hFile;
#endif

            memset(&ofnTemp, 0, sizeof (ofnTemp));
            memset(&ofs, 0, sizeof(ofs));

            ofnTemp.lStructSize = sizeof (ofnTemp);
            ofnTemp.hwndOwner = hWndMain;
            ofnTemp.hInstance = hInst;
            ofnTemp.lpstrFilter = "All Files (*.*)\0*.*\0\0";
            ofnTemp.nFilterIndex = 1;
            ofnTemp.lpstrFile = szFilename;
            ofnTemp.nMaxFile = PATH_MAX;
            ofnTemp.lpstrInitialDir = NULL;
            ofnTemp.Flags = OFN_FILEMUSTEXIST;

            if (GetOpenFileName (&ofnTemp))
               {
               extern BOOL MapCRtoCRLF(LPSTR);
               SendMessage(hWndEdit, WM_COMMAND, IDM_CLEAR_STATUS, 0L);
#ifndef WIN32
               hFile = OpenFile(szFilename, &ofs, OF_READ);
               _lread (hFile, pszBuffer, (UINT)EDIT_BUF_SIZE);
               _lclose (hFile);
#else
               hFile = CreateFile(szFilename, GENERIC_READ, 0, NULL,
                  OPEN_EXISTING, FILE_ATTRIBUTE_ARCHIVE, NULL);
               dwSize = GetFileSize(hFile, NULL);
               if (dwSize >= (dwEditBufSize - 1))
                  {
                  HGLOBAL hTemp;
                  GlobalUnlock(hEditor);
                  hTemp = GlobalReAlloc(hEditor, dwSize + 0x1000,
                     GMEM_MOVEABLE|GMEM_ZEROINIT);
                  if (hTemp)
                     {
                     hEditor = hTemp;
                     dwEditBufSize = dwSize + 0x1000;
                     }
                  else
                     MessageBox(hWndMain,
                        "Cannot allocate enough memory for file. Truncating file.",
                        "Insufficient Memory",
                        MB_ICONINFORMATION|MB_OK);
                  pszBuffer = GlobalLock(hEditor);
                  memset(pszBuffer, '\0', dwEditBufSize);
                  }
               ReadFile(hFile, pszBuffer, dwSize, &bytes_written, NULL);
               CloseHandle(hFile);
#endif
               /* Convert CR to CRLF and strip formfeeds */
               MapCRtoCRLF(pszBuffer);

               SendMessage(hWndEdit, WM_SETTEXT, 0, (LPARAM)pszBuffer);
               SetWindowText(hWndStatic, szFilename);
               UpdateWindow(hWndEdit);
               }
            }
            break;

         case IDM_MAX_STATUS:
            {
            SendMessage(hStatusButton, WM_LBUTTONDOWN,
                  MK_LBUTTON, MAKELPARAM(5,5) );
            break;
            }

         case IDM_SETFOCUS_ON_STATUS: /* posted from Action() following extract-to-Status */
            SetFocus(hWndEdit);   /* set focus on Status so user can scroll */
            break;

         case IDM_ZIP_STATS:
            {
            char szCompFactor[10];
            char sgn;
            char CompFactorStr[] = "%c%d%%";
            char CompFactor100[] = "100%%";

            if (lpumb->szFileName[0])   /* if file selected */
               {
               if (lpUserFunctions->TotalSizeComp > lpUserFunctions->TotalSize)
                  sgn = '-';
               else
                  sgn = ' ';

               if (lpUserFunctions->CompFactor == 100)
                   sprintf(szCompFactor, CompFactor100);
               else
                   sprintf(szCompFactor, CompFactorStr, sgn,
                      lpUserFunctions->CompFactor);
               wsprintf(szTotalsLine,
               "Total Size\t\t%7lu\nCompressed Size\t%7lu\nRatio\t\t%6s\nTotal Files\t%7u",
                      lpUserFunctions->TotalSize,
                      lpUserFunctions->TotalSizeComp,
                      szCompFactor,
                      lpUserFunctions->NumMembers);
               MessageBox(hWndMain, szTotalsLine,
                  lpumb->szFileName, MB_ICONINFORMATION | MB_OK);
               }
            }
            break;
         default:
            return DefWindowProc(hWnd, wMessage, wParam, lParam);
            }
        } /* bottom of not in help mode */
        break;

    case WM_SETCURSOR:
        /* In help mode it is necessary to reset the cursor in response */
        /* to every WM_SETCURSOR message.Otherwise, by default, Windows */
        /* will reset the cursor to that of the window class. */

        if (uf.fHelp)
        {
            SetCursor(hHelpCursor);
            break;
        }
        return DefWindowProc(hWnd, wMessage, wParam, lParam);


    case WM_INITMENU:
        if (uf.fHelp)
           {
           SetCursor(hHelpCursor);
           }
        return TRUE;

    case WM_ENTERIDLE:
        if ((LOWORD(wParam) == MSGF_MENU) && (GetKeyState(VK_F1) & 0x8000))
           {
           uf.fHelp = TRUE;
           PostMessage(hWnd, WM_KEYDOWN, VK_RETURN, 0L);
           }
        break;

    case WM_CLOSE:
        DestroyWindow(hWnd);
        break;

    case WM_DESTROY:
        if ( uf.fCanDragDrop )
            DragAcceptFiles( hWnd, FALSE );
        DeleteObject(hBrush);
        WinHelp(hWnd, szHelpFileName, HELP_QUIT, 0L);
        PostQuitMessage(0);
        break;

    case WM_DROPFILES:
        {
        WORD    cFiles;

        /* Get the number of files that have been dropped */
        cFiles = (WORD)DragQueryFile( (HDROP)wParam, (UINT)-1, lpumb->szBuffer, (UINT)256);

        /* Only handle one dropped file until MDI-ness happens */
        if (cFiles == 1)
           {
           RECT    rClient;

           DragQueryFile( (HDROP)wParam, 0, lpumb->szFileName, PATH_MAX);
           GetArchiveDir(lpumb->szDirName); /* get archive dir name */
           if (uf.fUnzipToZipDir || /* unzipping to same directory as archive */
               szUnzipToDirName[0] == '\0') /* or no default */
              {
              /* strip off filename to make directory name    */
              lstrcpy(szUnzipToDirName, lpumb->szDirName);
              }
           lstrcpy(lpumb->szBuffer, lpumb->szDirName); /* get scratch copy */
           DlgDirList (hWnd, lpumb->szBuffer, 0, 0, 0); /* change dir */
           UpdateListBox(); /* fill in list box */
#ifndef WIN32
           SendMessage(hWndList, LB_SETSEL, 1, 0L);
#else
           ListViewSetSel(0, TRUE);
#endif           
           UpdateButtons(); /* update state of buttons */

           WinAssert(hWndList);
           GetClientRect( hWndList, &rClient );
           OffsetRect( &rClient, 0, dyChar );
           rClient.top = rClient.bottom;
           rClient.bottom = rClient.top + (2*dyChar);
           InvalidateRect( hWnd, &rClient, TRUE);
           SetCaption(hWnd);
           }
        DragFinish( (HDROP)wParam );
        }
        break;

#ifndef WIN32
    case WM_PAINT:
           {
           PAINTSTRUCT ps;
           RECT    rClient;
           DWORD   dwBackColor;
           char szCompFactor[10];
           char sgn;
           char CompFactorStr[] = "%c%d%%";
           char CompFactor100[] = "100%%";

           hDC = BeginPaint( hWnd, &ps );
           if ( hDC )
              {
              WinAssert(hWndList);
              UpdateWindow( hWndList );
              hOldFont = SelectObject ( hDC, hFixedFont);

              WinAssert(hWnd);
              GetClientRect( hWnd, &rClient );
              dwBackColor = SetBkColor(hDC,GetSysColor(COLOR_SCROLLBAR));

              /* Move "header" down two lines for button room at top */
              rClient.top = 2 * dyChar;
              rClient.left += dxChar/2;
              /* "Draw the header */
              DrawText( hDC, (LPSTR)Headers[uf.fFormatLong], -1,
                  &rClient, DT_NOPREFIX | DT_TOP);

              if (lpumb->szFileName[0])   /* if file selected */
                 {
                 WinAssert(hWndList);
                 GetClientRect( hWndList, &rClient );
                 /* Drop rectangle down 1 vertical char + 2 */
                 OffsetRect( &rClient, 0, dyChar+2);
                 rClient.left += dxChar/2;

                 /* Move totals "trailer" down two lines for button room */
                 rClient.top = rClient.bottom + (2 * dyChar) +
                  (2 * GetSystemMetrics(SM_CYDLGFRAME));
                 rClient.bottom = rClient.top + dyChar;
                 DrawText( hDC, (LPSTR)szTrailers[uf.fFormatLong], -1,
                   &rClient, DT_NOPREFIX | DT_TOP);

                 /* Display totals line at bottom of listbox */
                 rClient.top += dyChar;
                 rClient.bottom += dyChar;

                 if (lpUserFunctions->TotalSizeComp > lpUserFunctions->TotalSize)
                    sgn = '-';
                 else
                    sgn = ' ';

                 if (lpUserFunctions->CompFactor == 100)
                     sprintf(szCompFactor, CompFactor100);
                 else
                     sprintf(szCompFactor, CompFactorStr, sgn,
                        lpUserFunctions->CompFactor);
                 if (uf.fFormatLong)
                     wsprintf(szTotalsLine, LongFileTrailer,
                        lpUserFunctions->TotalSize,
                        lpUserFunctions->TotalSizeComp,
                        szCompFactor,
                        lpUserFunctions->NumMembers,
                        lpUserFunctions->NumMembers == 1 ? "":"s");
                 else
                     wsprintf(szTotalsLine, ShortFileTrailer,
                        lpUserFunctions->TotalSize,
                        lpUserFunctions->NumMembers,
                        lpUserFunctions->NumMembers == 1 ? "" : "s");

                 DrawText( hDC, szTotalsLine, -1,
                    &rClient, DT_NOPREFIX | DT_TOP);
                 }
              SetBkColor(hDC, dwBackColor);
              (void)SelectObject ( hDC, hOldFont);
            }
           EndPaint(hWnd, &ps);
           break;
           }
#endif
   default:
      if (wMessage == uCommDlgHelpMsg)   /* common dialog help message ID */
         {
         WinHelp(hWnd, szHelpFileName, HELP_CONTEXT, dwCommDlgHelpId );
         return 0;
         }
      return DefWindowProc(hWnd, wMessage, wParam, lParam);
    }
    ret