src/stubs/metafile.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        metafile.cpp
   3 // Purpose:     wxMetaFile, wxMetaFileDC etc. These classes are optional.
   4 // Author:      AUTHOR
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) AUTHOR
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "metafile.h"
  14 #endif
  15
  16 #include "wx/metafile.h"
  17 #include "wx/clipbrd.h"
  18
  19 extern bool wxClipboardIsOpen;
  20
  21 #if !USE_SHARED_LIBRARY
  22 IMPLEMENT_DYNAMIC_CLASS(wxMetaFile, wxObject)
  23 IMPLEMENT_ABSTRACT_CLASS(wxMetaFileDC, wxDC)
  24 #endif
  25
  26 wxMetaFile::wxMetaFile(const wxString& file)
  27 {
  28     // TODO
  29 }
  30
  31 wxMetaFile::~wxMetaFile()
  32 {
  33     // TODO
  34 }
  35
  36 bool wxMetaFile::SetClipboard(int width, int height)
  37 {
  38     bool alreadyOpen=wxClipboardOpen();
  39     if (!alreadyOpen)
  40     {
  41         wxOpenClipboard();
  42         if (!wxEmptyClipboard()) return FALSE;
  43     }
  44     bool success = wxSetClipboardData(wxDF_METAFILE,this, width,height);
  45     if (!alreadyOpen) wxCloseClipboard();
  46     return (bool) success;
  47 }
  48
  49 bool wxMetaFile::Play(wxDC *dc)
  50 {
  51     // TODO
  52     return false;
  53 }
  54
  55 /*
  56  * Metafile device context
  57  *
  58  */
  59
  60 // Original constructor that does not takes origin and extent. If you use this,
  61 // *DO* give origin/extent arguments to wxMakeMetaFilePlaceable.
  62 wxMetaFileDC::wxMetaFileDC(const wxString& file)
  63 {
  64     // TODO
  65 }
  66
  67 // New constructor that takes origin and extent. If you use this, don't
  68 // give origin/extent arguments to wxMakeMetaFilePlaceable.
  69 wxMetaFileDC::wxMetaFileDC(const wxString& file, int xext, int yext, int xorg, int yorg)
  70 {
  71     // TODO
  72 }
  73
  74 wxMetaFileDC::~wxMetaFileDC()
  75 {
  76 }
  77
  78 void wxMetaFileDC::GetTextExtent(const wxString& string, float *x, float *y,
  79                                  float *descent, float *externalLeading, wxFont *theFont, bool use16bit)
  80 {
  81     // TODO
  82 }
  83
  84 wxMetaFile *wxMetaFileDC::Close()
  85 {
  86     // TODO
  87     return NULL;
  88 }
  89
  90 void wxMetaFileDC::SetMapMode(int mode)
  91 {
  92     // TODO
  93 }
  94
  95 #if 0
  96
  97 #ifdef __WIN32__
  98 struct RECT32
  99 {
 100   short left;
 101   short top;
 102   short right;
 103   short bottom;
 104 };
 105
 106 struct mfPLACEABLEHEADER {
 107         DWORD   key;
 108         short   hmf;
 109         RECT32  bbox;
 110         WORD    inch;
 111         DWORD   reserved;
 112         WORD    checksum;
 113 };
 114 #else
 115 struct mfPLACEABLEHEADER {
 116         DWORD   key;
 117         HANDLE  hmf;
 118         RECT    bbox;
 119         WORD    inch;
 120         DWORD   reserved;
 121         WORD    checksum;
 122 };
 123 #endif
 124
 125 /*
 126  * Pass filename of existing non-placeable metafile, and bounding box.
 127  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 128  * and sets the window origin and extent to mimic the MM_TEXT mapping mode.
 129  *
 130  */
 131
 132 bool wxMakeMetaFilePlaceable(const wxString& filename, float scale)
 133 {
 134   return wxMakeMetaFilePlaceable(filename, 0, 0, 0, 0, scale, FALSE);
 135 }
 136
 137 bool wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale, bool useOriginAndExtent)
 138 {
 139   // I'm not sure if this is the correct way of suggesting a scale
 140   // to the client application, but it's the only way I can find.
 141   int unitsPerInch = (int)(576/scale);
 142
 143   mfPLACEABLEHEADER header;
 144   header.key = 0x9AC6CDD7L;
 145   header.hmf = 0;
 146   header.bbox.left = (int)(x1);
 147   header.bbox.top = (int)(y1);
 148   header.bbox.right = (int)(x2);
 149   header.bbox.bottom = (int)(y2);
 150   header.inch = unitsPerInch;
 151   header.reserved = 0;
 152
 153   // Calculate checksum
 154   WORD *p;
 155   mfPLACEABLEHEADER *pMFHead = &header;
 156   for (p =(WORD *)pMFHead,pMFHead -> checksum = 0;
 157         p < (WORD *)&pMFHead ->checksum; ++p)
 158        pMFHead ->checksum ^= *p;
 159
 160   FILE *fd = fopen((char *)(const char *)filename, "rb");
 161   if (!fd) return FALSE;
 162
 163   char tempFileBuf[256];
 164   wxGetTempFileName("mf", tempFileBuf);
 165   FILE *fHandle = fopen(tempFileBuf, "wb");
 166   if (!fHandle)
 167     return FALSE;
 168   fwrite((void *)&header, sizeof(unsigned char), sizeof(mfPLACEABLEHEADER), fHandle);
 169
 170   // Calculate origin and extent
 171   int originX = x1;
 172   int originY = y1;
 173   int extentX = x2 - x1;
 174   int extentY = (y2 - y1);
 175
 176   // Read metafile header and write
 177   METAHEADER metaHeader;
 178   fread((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fd);
 179
 180   if (useOriginAndExtent)
 181     metaHeader.mtSize += 15;
 182   else
 183     metaHeader.mtSize += 5;
 184
 185   fwrite((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fHandle);
 186
 187   // Write SetMapMode, SetWindowOrigin and SetWindowExt records
 188   char modeBuffer[8];
 189   char originBuffer[10];
 190   char extentBuffer[10];
 191   METARECORD *modeRecord = (METARECORD *)&modeBuffer;
 192
 193   METARECORD *originRecord = (METARECORD *)&originBuffer;
 194   METARECORD *extentRecord = (METARECORD *)&extentBuffer;
 195
 196   modeRecord->rdSize = 4;
 197   modeRecord->rdFunction = META_SETMAPMODE;
 198   modeRecord->rdParm[0] = MM_ANISOTROPIC;
 199
 200   originRecord->rdSize = 5;
 201   originRecord->rdFunction = META_SETWINDOWORG;
 202   originRecord->rdParm[0] = originY;
 203   originRecord->rdParm[1] = originX;
 204
 205   extentRecord->rdSize = 5;
 206   extentRecord->rdFunction = META_SETWINDOWEXT;
 207   extentRecord->rdParm[0] = extentY;
 208   extentRecord->rdParm[1] = extentX;
 209
 210   fwrite((void *)modeBuffer, sizeof(char), 8, fHandle);
 211
 212   if (useOriginAndExtent)
 213   {
 214     fwrite((void *)originBuffer, sizeof(char), 10, fHandle);
 215     fwrite((void *)extentBuffer, sizeof(char), 10, fHandle);
 216   }
 217
 218   int ch = -2;
 219   while (ch != EOF)
 220   {
 221     ch = getc(fd);
 222     if (ch != EOF)
 223     {
 224       putc(ch, fHandle);
 225     }
 226   }
 227   fclose(fHandle);
 228   fclose(fd);
 229   wxRemoveFile(filename);
 230   wxCopyFile(tempFileBuf, filename);
 231   wxRemoveFile(tempFileBuf);
 232   return TRUE;
 233 }
 234
 235 #endif
 236