programs/view/view.c

   1 /*
   2  * Copyright 1998 Douglas Ridgway
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include <windows.h>
  20 #include "resource.h"
  21
  22 /*
  23 #include <windowsx.h>
  24    Wine doesn't have windowsx.h, so we use this
  25 */
  26 #define       GET_WM_COMMAND_ID(wp,lp)        LOWORD(wp)
  27
  28 /* Wine seems to need this */
  29 #include <commdlg.h>
  30
  31 #include "globals.h"
  32 #include <stdio.h>
  33
  34 BOOL FileIsPlaceable( LPCSTR szFileName );
  35 HMETAFILE GetPlaceableMetaFile( HWND hwnd, LPCSTR szFileName );
  36
  37 #define FN_LENGTH 80
  38
  39 HMETAFILE hmf;
  40 int deltax = 0, deltay = 0;
  41 int width = 0, height = 0;
  42 BOOL isAldus;
  43
  44 BOOL FileOpen(HWND hWnd, char *fn)
  45 {
  46   OPENFILENAME ofn = { sizeof(OPENFILENAME),
  47                        0, 0, NULL, NULL, 0, 0, NULL,
  48                        FN_LENGTH, NULL, 0, NULL, NULL, OFN_CREATEPROMPT |
  49                        OFN_SHOWHELP, 0, 0, NULL, 0, NULL };
  50   ofn.lpstrFilter = "Metafiles\0*.wmf\0";
  51   ofn.hwndOwner = hWnd;
  52   ofn.lpstrFile = fn;
  53   return GetOpenFileName(&ofn);
  54 }
  55
  56
  57 LRESULT CALLBACK WndProc(HWND hwnd,
  58                          UINT uMessage,
  59                          WPARAM wparam,
  60                          LPARAM lparam)
  61 {
  62   switch (uMessage)
  63     {
  64     case WM_PAINT:
  65       {
  66         PAINTSTRUCT ps;
  67         BeginPaint(hwnd, &ps);
  68         SetMapMode(ps.hdc, MM_ANISOTROPIC);
  69         SetViewportExtEx(ps.hdc, width, height, NULL);
  70         SetViewportOrgEx(ps.hdc, deltax, deltay, NULL);
  71         if(hmf) PlayMetaFile(ps.hdc, hmf);
  72         EndPaint(hwnd, &ps);
  73
  74       }
  75       break;
  76
  77     case WM_COMMAND: /* message: command from application menu */
  78       switch (GET_WM_COMMAND_ID(wparam,lparam))
  79         {
  80         case IDM_HELLO:
  81           MessageBox( hwnd , "Hello there world!", "Hello", MB_OK);
  82           break;
  83
  84         case IDM_OPEN:
  85           {
  86             char filename[FN_LENGTH];
  87             if (FileOpen(hwnd, filename)) {
  88               isAldus = FileIsPlaceable(filename);
  89               if (isAldus) {
  90                 hmf = GetPlaceableMetaFile(hwnd, filename);
  91               } else {
  92                 RECT r;
  93                 hmf = GetMetaFile(filename);
  94                 GetClientRect(hwnd, &r);
  95                 width = r.right - r.left;
  96                 height = r.bottom - r.top;
  97               }
  98               InvalidateRect( hwnd, NULL, TRUE );
  99             }
 100           }
 101           break;
 102
 103         case IDM_SET_EXT_TO_WIN:
 104           {
 105             RECT r;
 106             GetClientRect(hwnd, &r);
 107             width = r.right - r.left;
 108             height = r.bottom - r.top;
 109             InvalidateRect( hwnd, NULL, TRUE );
 110           }
 111           break;
 112
 113
 114         case IDM_LEFT:
 115           deltax += 100;
 116           InvalidateRect( hwnd, NULL, TRUE );
 117           break;
 118         case IDM_RIGHT:
 119           deltax -= 100;
 120           InvalidateRect( hwnd, NULL, TRUE );
 121           break;
 122         case IDM_UP:
 123           deltay += 100;
 124           InvalidateRect( hwnd, NULL, TRUE );
 125           break;
 126         case IDM_DOWN:
 127           deltay -= 100;
 128           InvalidateRect( hwnd, NULL, TRUE );
 129           break;
 130
 131         case IDM_EXIT:
 132           DestroyWindow(hwnd);
 133           break;
 134
 135         default:
 136           return DefWindowProc(hwnd, uMessage, wparam, lparam);
 137         }
 138       break;
 139
 140     case WM_DESTROY:  /* message: window being destroyed */
 141       PostQuitMessage(0);
 142       break;
 143
 144     default:          /* Passes it on if unproccessed */
 145       return DefWindowProc(hwnd, uMessage, wparam, lparam);
 146     }
 147     return 0;
 148 }
 149
 150 BOOL FileIsPlaceable( LPCSTR szFileName )
 151 {
 152   HFILE         hInFile;
 153   APMFILEHEADER apmh;
 154
 155   if( (hInFile = _lopen( szFileName, OF_READ ) ) == HFILE_ERROR )
 156     return FALSE;
 157
 158   if( _lread( hInFile, &apmh, sizeof(APMFILEHEADER) )
 159       != sizeof(APMFILEHEADER) )
 160     {
 161       _lclose( hInFile );
 162       return FALSE;
 163     }
 164   _lclose( hInFile );
 165
 166   /* Is it placeable? */
 167   return (apmh.key == APMHEADER_KEY);
 168 }
 169
 170 HMETAFILE GetPlaceableMetaFile( HWND hwnd, LPCSTR szFileName )
 171 {
 172   LPSTR lpData;
 173   METAHEADER mfHeader;
 174   APMFILEHEADER APMHeader;
 175   HFILE fh;
 176   HMETAFILE hmf;
 177   WORD checksum, *p;
 178   int i;
 179
 180   if( (fh = _lopen( szFileName, OF_READ ) ) == HFILE_ERROR ) return 0;
 181   _llseek(fh, 0, 0);
 182   if (!_lread(fh, (LPSTR)&APMHeader, sizeof(APMFILEHEADER))) return 0;
 183   _llseek(fh, sizeof(APMFILEHEADER), 0);
 184   checksum = 0;
 185   p = (WORD *) &APMHeader;
 186
 187   for(i=0; i<10; i++)
 188     checksum ^= *p++;
 189   if (checksum != APMHeader.checksum) {
 190     char msg[128];
 191     sprintf(msg, "Computed checksum %04x != stored checksum %04x\n",
 192            checksum, APMHeader.checksum);
 193         MessageBox(hwnd, msg, "Checksum failed", MB_OK);
 194     return 0;
 195   }
 196
 197   if (!_lread(fh, (LPSTR)&mfHeader, sizeof(METAHEADER))) return 0;
 198
 199   if (!(lpData = (LPSTR) GlobalAlloc(GPTR, (mfHeader.mtSize * 2L)))) return 0;
 200
 201   _llseek(fh, sizeof(APMFILEHEADER), 0);
 202   if (!_lread(fh, lpData, (UINT)(mfHeader.mtSize * 2L)))
 203   {
 204     GlobalFree((HGLOBAL)lpData);
 205     _lclose(fh);
 206     return 0;
 207   }
 208   _lclose(fh);
 209
 210   if (!(hmf = SetMetaFileBitsEx(mfHeader.mtSize*2, lpData)))
 211     return 0;
 212
 213
 214   width = APMHeader.bbox.Right - APMHeader.bbox.Left;
 215   height = APMHeader.bbox.Bottom - APMHeader.bbox.Top;
 216
 217   /*      printf("Ok! width %d height %d inch %d\n", width, height, APMHeader.inch);  */
 218   width = width*96/APMHeader.inch;
 219   height = height*96/APMHeader.inch;
 220
 221   deltax = 0;
 222   deltay = 0 ;
 223   return hmf;
 224 }
 225
 226