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/object.h"
  17 #include "wx/string.h"
  18 #include "wx/dc.h"
  19 #include "wx/stubs/metafile.h"
  20 #include "wx/clipbrd.h"
  21
  22 extern bool wxClipboardIsOpen;
  23
  24 #if !USE_SHARED_LIBRARY
  25 IMPLEMENT_DYNAMIC_CLASS(wxMetaFile, wxObject)
  26 IMPLEMENT_ABSTRACT_CLASS(wxMetaFileDC, wxDC)
  27 #endif
  28
  29 wxMetaFile::wxMetaFile(const wxString& file)
  30 {
  31     // TODO
  32 }
  33
  34 wxMetaFile::~wxMetaFile()
  35 {
  36     // TODO
  37 }
  38
  39 bool wxMetaFile::SetClipboard(int width, int height)
  40 {
  41     bool alreadyOpen=wxClipboardOpen();
  42     if (!alreadyOpen)
  43     {
  44         wxOpenClipboard();
  45         if (!wxEmptyClipboard()) return FALSE;
  46     }
  47     bool success = wxSetClipboardData(wxDF_METAFILE,this, width,height);
  48     if (!alreadyOpen) wxCloseClipboard();
  49     return (bool) success;
  50 }
  51
  52 bool wxMetaFile::Play(wxDC *dc)
  53 {
  54     // TODO
  55     return FALSE;
  56 }
  57
  58 /*
  59  * Metafile device context
  60  *
  61  */
  62
  63 // Original constructor that does not takes origin and extent. If you use this,
  64 // *DO* give origin/extent arguments to wxMakeMetaFilePlaceable.
  65 wxMetaFileDC::wxMetaFileDC(const wxString& file)
  66 {
  67     // TODO
  68 }
  69
  70 // New constructor that takes origin and extent. If you use this, don't
  71 // give origin/extent arguments to wxMakeMetaFilePlaceable.
  72 wxMetaFileDC::wxMetaFileDC(const wxString& file, int xext, int yext, int xorg, int yorg)
  73 {
  74     // TODO
  75 }
  76
  77 wxMetaFileDC::~wxMetaFileDC()
  78 {
  79 }
  80
  81 void wxMetaFileDC::GetTextExtent(const wxString& string, float *x, float *y,
  82                                  float *descent, float *externalLeading, wxFont *theFont, bool use16bit)
  83 {
  84     // TODO
  85 }
  86
  87 wxMetaFile *wxMetaFileDC::Close()
  88 {
  89     // TODO
  90     return NULL;
  91 }
  92
  93 void wxMetaFileDC::SetMapMode(int mode)
  94 {
  95     // TODO
  96 }
  97
  98 #if 0
  99
 100 #ifdef __WIN32__
 101 struct RECT32
 102 {
 103   short left;
 104   short top;
 105   short right;
 106   short bottom;
 107 };
 108
 109 struct mfPLACEABLEHEADER {
 110         DWORD   key;
 111         short   hmf;
 112         RECT32  bbox;
 113         WORD    inch;
 114         DWORD   reserved;
 115         WORD    checksum;
 116 };
 117 #else
 118 struct mfPLACEABLEHEADER {
 119         DWORD   key;
 120         HANDLE  hmf;
 121         RECT    bbox;
 122         WORD    inch;
 123         DWORD   reserved;
 124         WORD    checksum;
 125 };
 126 #endif
 127
 128 /*
 129  * Pass filename of existing non-placeable metafile, and bounding box.
 130  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 131  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 132  *
 133  */
 134
 135 bool wxMakeMetaFilePlaceable(const wxString& filename, float scale)
 136 {
 137   return wxMakeMetaFilePlaceable(filename, 0, 0, 0, 0, scale, FALSE);
 138 }
 139
 140 bool wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale, bool useOriginAndExtent)
 141 {
 142   // I'm not sure if this is the correct way of suggesting a scale
 143   // to the client application, but it's the only way I can find.
 144   int unitsPerInch = (int)(576/scale);
 145
 146   mfPLACEABLEHEADER header;
 147   header.key = 0x9AC6CDD7L;
 148   header.hmf = 0;
 149   header.bbox.left = (int)(x1);
 150   header.bbox.top = (int)(y1);
 151   header.bbox.right = (int)(x2);
 152   header.bbox.bottom = (int)(y2);
 153   header.inch = unitsPerInch;
 154   header.reserved = 0;
 155
 156   // Calculate checksum
 157   WORD *p;
 158   mfPLACEABLEHEADER *pMFHead = &header;
 159   for (p =(WORD *)pMFHead,pMFHead -> checksum = 0;
 160         p < (WORD *)&pMFHead ->checksum; ++p)
 161        pMFHead ->checksum ^= *p;
 162
 163   FILE *fd = fopen((char *)(const char *)filename, "rb");
 164   if (!fd) return FALSE;
 165
 166   char tempFileBuf[256];
 167   wxGetTempFileName("mf", tempFileBuf);
 168   FILE *fHandle = fopen(tempFileBuf, "wb");
 169   if (!fHandle)
 170     return FALSE;
 171   fwrite((void *)&header, sizeof(unsigned char), sizeof(mfPLACEABLEHEADER), fHandle);
 172
 173   // Calculate origin and extent
 174   int originX = x1;
 175   int originY = y1;
 176   int extentX = x2 - x1;
 177   int extentY = (y2 - y1);
 178
 179   // Read metafile header and write
 180   METAHEADER metaHeader;
 181   fread((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fd);
 182
 183   if (useOriginAndExtent)
 184     metaHeader.mtSize += 15;
 185   else
 186     metaHeader.mtSize += 5;
 187
 188   fwrite((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fHandle);
 189
 190   // Write SetMapMode, SetWindowOrigin and SetWindowExt records
 191   char modeBuffer[8];
 192   char originBuffer[10];
 193   char extentBuffer[10];
 194   METARECORD *modeRecord = (METARECORD *)&modeBuffer;
 195
 196   METARECORD *originRecord = (METARECORD *)&originBuffer;
 197   METARECORD *extentRecord = (METARECORD *)&extentBuffer;
 198
 199   modeRecord->rdSize = 4;
 200   modeRecord->rdFunction = META_SETMAPMODE;
 201   modeRecord->rdParm[0] = MM_ANISOTROPIC;
 202
 203   originRecord->rdSize = 5;
 204   originRecord->rdFunction = META_SETWINDOWORG;
 205   originRecord->rdParm[0] = originY;
 206   originRecord->rdParm[1] = originX;
 207
 208   extentRecord->rdSize = 5;
 209   extentRecord->rdFunction = META_SETWINDOWEXT;
 210   extentRecord->rdParm[0] = extentY;
 211   extentRecord->rdParm[1] = extentX;
 212
 213   fwrite((void *)modeBuffer, sizeof(char), 8, fHandle);
 214
 215   if (useOriginAndExtent)
 216   {
 217     fwrite((void *)originBuffer, sizeof(char), 10, fHandle);
 218     fwrite((void *)extentBuffer, sizeof(char), 10, fHandle);
 219   }
 220
 221   int ch = -2;
 222   while (ch != EOF)
 223   {
 224     ch = getc(fd);
 225     if (ch != EOF)
 226     {
 227       putc(ch, fHandle);
 228     }
 229   }
 230   fclose(fHandle);
 231   fclose(fd);
 232   wxRemoveFile(filename);
 233   wxCopyFile(tempFileBuf, filename);
 234   wxRemoveFile(tempFileBuf);
 235   return TRUE;
 236 }
 237
 238 #endif
 239