src/motif/metafile.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        metafile.cpp
   3 // Purpose:     wxMetaFile, wxMetaFileDC etc. These classes are optional.
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   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/motif/metafile.h"
  20 #include "wx/clipbrd.h"
  21
  22 extern bool wxClipboardIsOpen;
  23
  24 IMPLEMENT_DYNAMIC_CLASS(wxMetaFile, wxObject)
  25 IMPLEMENT_ABSTRACT_CLASS(wxMetaFileDC, wxDC)
  26
  27 wxMetaFile::wxMetaFile(const wxString& file)
  28 {
  29     // TODO
  30 }
  31
  32 wxMetaFile::~wxMetaFile()
  33 {
  34     // TODO
  35 }
  36
  37 bool wxMetaFile::SetClipboard(int width, int height)
  38 {
  39     bool alreadyOpen=wxClipboardOpen();
  40     if (!alreadyOpen)
  41     {
  42         wxOpenClipboard();
  43         if (!wxEmptyClipboard()) return FALSE;
  44     }
  45     bool success = wxSetClipboardData(wxDF_METAFILE,this, width,height);
  46     if (!alreadyOpen) wxCloseClipboard();
  47     return (bool) success;
  48 }
  49
  50 bool wxMetaFile::Play(wxDC *dc)
  51 {
  52     // TODO
  53     return FALSE;
  54 }
  55
  56 /*
  57  * Metafile device context
  58  *
  59  */
  60
  61 // Original constructor that does not takes origin and extent. If you use this,
  62 // *DO* give origin/extent arguments to wxMakeMetaFilePlaceable.
  63 wxMetaFileDC::wxMetaFileDC(const wxString& file)
  64 {
  65     // TODO
  66 }
  67
  68 // New constructor that takes origin and extent. If you use this, don't
  69 // give origin/extent arguments to wxMakeMetaFilePlaceable.
  70 wxMetaFileDC::wxMetaFileDC(const wxString& file, int xext, int yext, int xorg, int yorg)
  71 {
  72     // TODO
  73 }
  74
  75 wxMetaFileDC::~wxMetaFileDC()
  76 {
  77 }
  78
  79 void wxMetaFileDC::GetTextExtent(const wxString& string, float *x, float *y,
  80                                  float *descent, float *externalLeading, wxFont *theFont, bool use16bit)
  81 {
  82     // TODO
  83 }
  84
  85 wxMetaFile *wxMetaFileDC::Close()
  86 {
  87     // TODO
  88     return NULL;
  89 }
  90
  91 void wxMetaFileDC::SetMapMode(int mode)
  92 {
  93     // TODO
  94 }
  95
  96 #if 0
  97
  98 #ifdef __WIN32__
  99 struct RECT32
 100 {
 101   short left;
 102   short top;
 103   short right;
 104   short bottom;
 105 };
 106
 107 struct mfPLACEABLEHEADER {
 108         DWORD   key;
 109         short   hmf;
 110         RECT32  bbox;
 111         WORD    inch;
 112         DWORD   reserved;
 113         WORD    checksum;
 114 };
 115 #else
 116 struct mfPLACEABLEHEADER {
 117         DWORD   key;
 118         HANDLE  hmf;
 119         RECT    bbox;
 120         WORD    inch;
 121         DWORD   reserved;
 122         WORD    checksum;
 123 };
 124 #endif
 125
 126 /*
 127  * Pass filename of existing non-placeable metafile, and bounding box.
 128  * Adds a placeable metafile header, sets the mapping mode to anisotropic,
 129  * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
 130  *
 131  */
 132
 133 bool wxMakeMetaFilePlaceable(const wxString& filename, float scale)
 134 {
 135   return wxMakeMetaFilePlaceable(filename, 0, 0, 0, 0, scale, FALSE);
 136 }
 137
 138 bool wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale, bool useOriginAndExtent)
 139 {
 140   // I'm not sure if this is the correct way of suggesting a scale
 141   // to the client application, but it's the only way I can find.
 142   int unitsPerInch = (int)(576/scale);
 143
 144   mfPLACEABLEHEADER header;
 145   header.key = 0x9AC6CDD7L;
 146   header.hmf = 0;
 147   header.bbox.left = (int)(x1);
 148   header.bbox.top = (int)(y1);
 149   header.bbox.right = (int)(x2);
 150   header.bbox.bottom = (int)(y2);
 151   header.inch = unitsPerInch;
 152   header.reserved = 0;
 153
 154   // Calculate checksum
 155   WORD *p;
 156   mfPLACEABLEHEADER *pMFHead = &header;
 157   for (p =(WORD *)pMFHead,pMFHead -> checksum = 0;
 158         p < (WORD *)&pMFHead ->checksum; ++p)
 159        pMFHead ->checksum ^= *p;
 160
 161   FILE *fd = fopen((char *)(const char *)filename, "rb");
 162   if (!fd) return FALSE;
 163
 164   char tempFileBuf[256];
 165   wxGetTempFileName("mf", tempFileBuf);
 166   FILE *fHandle = fopen(tempFileBuf, "wb");
 167   if (!fHandle)
 168     return FALSE;
 169   fwrite((void *)&header, sizeof(unsigned char), sizeof(mfPLACEABLEHEADER), fHandle);
 170
 171   // Calculate origin and extent
 172   int originX = x1;
 173   int originY = y1;
 174   int extentX = x2 - x1;
 175   int extentY = (y2 - y1);
 176
 177   // Read metafile header and write
 178   METAHEADER metaHeader;
 179   fread((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fd);
 180
 181   if (useOriginAndExtent)
 182     metaHeader.mtSize += 15;
 183   else
 184     metaHeader.mtSize += 5;
 185
 186   fwrite((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fHandle);
 187
 188   // Write SetMapMode, SetWindowOrigin and SetWindowExt records
 189   char modeBuffer[8];
 190   char originBuffer[10];
 191   char extentBuffer[10];
 192   METARECORD *modeRecord = (METARECORD *)&modeBuffer;
 193
 194   METARECORD *originRecord = (METARECORD *)&originBuffer;
 195   METARECORD *extentRecord = (METARECORD *)&extentBuffer;
 196
 197   modeRecord->rdSize = 4;
 198   modeRecord->rdFunction = META_SETMAPMODE;
 199   modeRecord->rdParm[0] = wxMM_ANISOTROPIC;
 200
 201   originRecord->rdSize = 5;
 202   originRecord->rdFunction = META_SETWINDOWORG;
 203   originRecord->rdParm[0] = originY;
 204   originRecord->rdParm[1] = originX;
 205
 206   extentRecord->rdSize = 5;
 207   extentRecord->rdFunction = META_SETWINDOWEXT;
 208   extentRecord->rdParm[0] = extentY;
 209   extentRecord->rdParm[1] = extentX;
 210
 211   fwrite((void *)modeBuffer, sizeof(char), 8, fHandle);
 212
 213   if (useOriginAndExtent)
 214   {
 215     fwrite((void *)originBuffer, sizeof(char), 10, fHandle);
 216     fwrite((void *)extentBuffer, sizeof(char), 10, fHandle);
 217   }
 218
 219   int ch = -2;
 220   while (ch != EOF)
 221   {
 222     ch = getc(fd);
 223     if (ch != EOF)
 224     {
 225       putc(ch, fHandle);
 226     }
 227   }
 228   fclose(fHandle);
 229   fclose(fd);
 230   wxRemoveFile(filename);
 231   wxCopyFile(tempFileBuf, filename);
 232   wxRemoveFile(tempFileBuf);
 233   return TRUE;
 234 }
 235
 236 #endif
 237