programs/view/view.c

   1 #include <windows.h>
   2
   3 /*
   4 #include <windowsx.h>
   5    Wine doesn't have windowsx.h, so we use this
   6 */
   7 #define       GET_WM_COMMAND_ID(wp,lp)        LOWORD(wp)
   8
   9 /* Wine seems to need this */
  10 #include <commdlg.h>
  11
  12 #include "globals.h"
  13 #include "resource.h"
  14 #include <stdio.h>
  15
  16 BOOL FileIsPlaceable( LPCSTR szFileName );
  17 HMETAFILE GetPlaceableMetaFile( LPCSTR szFileName );
  18
  19 #define FN_LENGTH 80
  20
  21 HMETAFILE hmf;
  22 int deltax = 0, deltay = 0;
  23 int width = 0, height = 0;
  24 BOOL isAldus;
  25
  26 BOOL FileOpen(HWND hWnd, char *fn)
  27 {
  28   OPENFILENAME ofn = { sizeof(OPENFILENAME),
  29                        0, NULL, "Metafiles\0*.wmf\0", NULL, 0, 0, NULL,
  30                        FN_LENGTH, NULL, 0, NULL, NULL, OFN_CREATEPROMPT |
  31                        OFN_SHOWHELP, 0, 0, NULL, 0, NULL };
  32   ofn.hwndOwner = hWnd;
  33   ofn.lpstrFile = fn;
  34   return GetOpenFileName(&ofn);
  35 }
  36
  37
  38 LRESULT CALLBACK WndProc(HWND hwnd,
  39                          UINT uMessage,
  40                          WPARAM wparam,
  41                          LPARAM lparam)
  42 {
  43   switch (uMessage)
  44     {
  45     case WM_PAINT:
  46       {
  47         PAINTSTRUCT ps;
  48         BeginPaint(hwnd, &ps);
  49         SetMapMode(ps.hdc, MM_ANISOTROPIC);
  50         SetViewportExt(ps.hdc, width, height);
  51         SetViewportOrgEx(ps.hdc, deltax, deltay, NULL);
  52         if(hmf) PlayMetaFile(ps.hdc, hmf);
  53         EndPaint(hwnd, &ps);
  54
  55       }
  56       break;
  57
  58     case WM_COMMAND: /* message: command from application menu */
  59       switch (GET_WM_COMMAND_ID(wparam,lparam))
  60         {
  61         case IDM_HELLO:
  62           MessageBox( hwnd , "Hello there world!", "Hello", MB_OK);
  63           break;
  64
  65         case IDM_OPEN:
  66           {
  67             char filename[FN_LENGTH];
  68             if (FileOpen(hwnd, filename)) {
  69               isAldus = FileIsPlaceable(filename);
  70               if (isAldus) {
  71                 hmf = GetPlaceableMetaFile(filename);
  72               } else {
  73                 RECT r;
  74                 hmf = GetMetaFile(filename);
  75                 GetClientRect(hwnd, &r);
  76                 width = r.right - r.left;
  77                 height = r.bottom - r.top;
  78               }
  79               InvalidateRect( hwnd, NULL, TRUE );
  80             }
  81           }
  82           break;
  83
  84         case IDM_LEFT:
  85           deltax += 100;
  86           InvalidateRect( hwnd, NULL, TRUE );
  87           break;
  88         case IDM_RIGHT:
  89           deltax -= 100;
  90           InvalidateRect( hwnd, NULL, TRUE );
  91           break;
  92         case IDM_UP:
  93           deltay += 100;
  94           InvalidateRect( hwnd, NULL, TRUE );
  95           break;
  96         case IDM_DOWN:
  97           deltay -= 100;
  98           InvalidateRect( hwnd, NULL, TRUE );
  99           break;
 100
 101         case IDM_EXIT:
 102           DestroyWindow(hwnd);
 103           break;
 104
 105         default:
 106           return DefWindowProc(hwnd, uMessage, wparam, lparam);
 107         }
 108       break;
 109
 110     case WM_DESTROY:  /* message: window being destroyed */
 111       PostQuitMessage(0);
 112       break;
 113
 114     default:          /* Passes it on if unproccessed */
 115       return DefWindowProc(hwnd, uMessage, wparam, lparam);
 116     }
 117     return 0;
 118 }
 119
 120 BOOL FileIsPlaceable( LPCSTR szFileName )
 121 {
 122   HFILE         hInFile;
 123   OFSTRUCT              inof;
 124   APMFILEHEADER apmh;
 125
 126   if( (hInFile = OpenFile( szFileName, &inof, OF_READ ) ) == HFILE_ERROR )
 127     return FALSE;
 128
 129   if( _lread( hInFile, &apmh, sizeof(APMFILEHEADER) )
 130       != sizeof(APMFILEHEADER) )
 131     {
 132       _lclose( hInFile );
 133       return FALSE;
 134     }
 135   _lclose( hInFile );
 136
 137   /* Is it placeable? */
 138   return (apmh.key == APMHEADER_KEY);
 139 }
 140
 141 HMETAFILE GetPlaceableMetaFile( LPCSTR szFileName )
 142 {
 143   LPSTR lpData;
 144   METAHEADER mfHeader;
 145   APMFILEHEADER APMHeader;
 146   HFILE fh;
 147   HMETAFILE hmf;
 148   OFSTRUCT inof;
 149   WORD checksum, *p;
 150   int i;
 151
 152   if( (fh = OpenFile( szFileName, &inof, OF_READ ) ) == HFILE_ERROR ) return 0;
 153   _llseek(fh, 0, 0);
 154   if (!_lread(fh, (LPSTR)&APMHeader, sizeof(APMFILEHEADER))) return 0;
 155   _llseek(fh, sizeof(APMFILEHEADER), 0);
 156   checksum = 0;
 157   p = (WORD *) &APMHeader;
 158
 159   for(i=0; i<10; i++)
 160     checksum ^= *p++;
 161   if (checksum != APMHeader.checksum) {
 162     char msg[128];
 163     sprintf(msg, "Computed checksum %04x != stored checksum %04x\n",
 164            checksum, APMHeader.checksum);
 165     /*    MessageBox(hwnd, msg, "Checksum failed", MB_OK); */
 166     return 0;
 167   }
 168
 169   if (!_lread(fh, (LPSTR)&mfHeader, sizeof(METAHEADER))) return 0;
 170
 171   if (!(lpData = GlobalAlloc(GPTR, (mfHeader.mtSize * 2L)))) return 0;
 172
 173   _llseek(fh, sizeof(APMFILEHEADER), 0);
 174   if (!_lread(fh, lpData, (UINT)(mfHeader.mtSize * 2L)))
 175   {
 176     GlobalFree(lpData);
 177     _lclose(fh);
 178     return NULL;
 179   }
 180   _lclose(fh);
 181
 182   if (!(hmf = SetMetaFileBitsEx(mfHeader.mtSize*2, lpData)))
 183     return NULL;
 184
 185
 186   width = APMHeader.bbox.right - APMHeader.bbox.left;
 187   height = APMHeader.bbox.bottom - APMHeader.bbox.top;
 188
 189   /*  printf("Ok! width %d height %d\n", width, height); */
 190   deltax = 0;
 191   deltay = 0 ;
 192   return hmf;
 193 }
 194
 195