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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3190 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/os2/metafile.cpp

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+/////////////////////////////////////////////////////////////////////////////
+// Name:        metafile.cpp
+// Purpose:     wxMetaFile, wxMetaFileDC etc. These classes are optional.
+// Author:      AUTHOR
+// Modified by:
+// Created:     04/01/98
+// RCS-ID:      $Id$
+// Copyright:   (c) AUTHOR
+// Licence:   	wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifdef __GNUG__
+#pragma implementation "metafile.h"
+#endif
+
+#include "wx/object.h"
+#include "wx/string.h"
+#include "wx/dc.h"
+#include "wx/stubs/metafile.h"
+#include "wx/clipbrd.h"
+
+extern bool wxClipboardIsOpen;
+
+#if !USE_SHARED_LIBRARY
+IMPLEMENT_DYNAMIC_CLASS(wxMetaFile, wxObject)
+IMPLEMENT_ABSTRACT_CLASS(wxMetaFileDC, wxDC)
+#endif
+
+wxMetaFile::wxMetaFile(const wxString& file)
+{
+    // TODO
+}
+
+wxMetaFile::~wxMetaFile()
+{
+    // TODO
+}
+
+bool wxMetaFile::SetClipboard(int width, int height)
+{
+    bool alreadyOpen=wxClipboardOpen();
+    if (!alreadyOpen)
+    {
+        wxOpenClipboard();
+        if (!wxEmptyClipboard()) return FALSE;
+    }
+    bool success = wxSetClipboardData(wxDF_METAFILE,this, width,height);
+    if (!alreadyOpen) wxCloseClipboard();
+    return (bool) success;
+}
+
+bool wxMetaFile::Play(wxDC *dc)
+{
+    // TODO
+    return FALSE;
+}
+
+/*
+ * Metafile device context
+ *
+ */
+
+// Original constructor that does not takes origin and extent. If you use this,
+// *DO* give origin/extent arguments to wxMakeMetaFilePlaceable.
+wxMetaFileDC::wxMetaFileDC(const wxString& file)
+{
+    // TODO
+}
+
+// New constructor that takes origin and extent. If you use this, don't
+// give origin/extent arguments to wxMakeMetaFilePlaceable.
+wxMetaFileDC::wxMetaFileDC(const wxString& file, int xext, int yext, int xorg, int yorg)
+{
+    // TODO
+}
+
+wxMetaFileDC::~wxMetaFileDC()
+{
+}
+
+void wxMetaFileDC::GetTextExtent(const wxString& string, float *x, float *y,
+                                 float *descent, float *externalLeading, wxFont *theFont, bool use16bit)
+{
+    // TODO
+}
+
+wxMetaFile *wxMetaFileDC::Close()
+{
+    // TODO
+    return NULL;
+}
+
+void wxMetaFileDC::SetMapMode(int mode)
+{
+    // TODO
+}
+
+#if 0
+
+#ifdef __WIN32__
+struct RECT32
+{
+  short left;
+  short top;
+  short right;
+  short bottom;
+};
+
+struct mfPLACEABLEHEADER {
+	DWORD	key;
+	short	hmf;
+	RECT32	bbox;
+	WORD	inch;
+	DWORD	reserved;
+	WORD	checksum;
+};
+#else
+struct mfPLACEABLEHEADER {
+	DWORD	key;
+	HANDLE	hmf;
+	RECT	bbox;
+	WORD	inch;
+	DWORD	reserved;
+	WORD	checksum;
+};
+#endif
+
+/*
+ * Pass filename of existing non-placeable metafile, and bounding box.
+ * Adds a placeable metafile header, sets the mapping mode to anisotropic,
+ * and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
+ *
+ */
+ 
+bool wxMakeMetaFilePlaceable(const wxString& filename, float scale)
+{
+  return wxMakeMetaFilePlaceable(filename, 0, 0, 0, 0, scale, FALSE);
+}
+
+bool wxMakeMetaFilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale, bool useOriginAndExtent)
+{
+  // I'm not sure if this is the correct way of suggesting a scale
+  // to the client application, but it's the only way I can find.
+  int unitsPerInch = (int)(576/scale);
+  
+  mfPLACEABLEHEADER header;
+  header.key = 0x9AC6CDD7L;
+  header.hmf = 0;
+  header.bbox.left = (int)(x1);
+  header.bbox.top = (int)(y1);
+  header.bbox.right = (int)(x2);
+  header.bbox.bottom = (int)(y2);
+  header.inch = unitsPerInch;
+  header.reserved = 0;
+
+  // Calculate checksum  
+  WORD *p;
+  mfPLACEABLEHEADER *pMFHead = &header;
+  for (p =(WORD *)pMFHead,pMFHead -> checksum = 0;
+	p < (WORD *)&pMFHead ->checksum; ++p)
+       pMFHead ->checksum ^= *p;
+
+  FILE *fd = fopen((char *)(const char *)filename, "rb");
+  if (!fd) return FALSE;
+  
+  char tempFileBuf[256];
+  wxGetTempFileName("mf", tempFileBuf);
+  FILE *fHandle = fopen(tempFileBuf, "wb");
+  if (!fHandle)
+    return FALSE;
+  fwrite((void *)&header, sizeof(unsigned char), sizeof(mfPLACEABLEHEADER), fHandle);
+
+  // Calculate origin and extent
+  int originX = x1;
+  int originY = y1;
+  int extentX = x2 - x1;
+  int extentY = (y2 - y1);
+
+  // Read metafile header and write
+  METAHEADER metaHeader;
+  fread((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fd);
+  
+  if (useOriginAndExtent)
+    metaHeader.mtSize += 15;
+  else
+    metaHeader.mtSize += 5;
+    
+  fwrite((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fHandle);
+
+  // Write SetMapMode, SetWindowOrigin and SetWindowExt records
+  char modeBuffer[8];
+  char originBuffer[10];
+  char extentBuffer[10];
+  METARECORD *modeRecord = (METARECORD *)&modeBuffer;
+
+  METARECORD *originRecord = (METARECORD *)&originBuffer;
+  METARECORD *extentRecord = (METARECORD *)&extentBuffer;
+
+  modeRecord->rdSize = 4;
+  modeRecord->rdFunction = META_SETMAPMODE;
+  modeRecord->rdParm[0] = MM_ANISOTROPIC;
+
+  originRecord->rdSize = 5;
+  originRecord->rdFunction = META_SETWINDOWORG;
+  originRecord->rdParm[0] = originY;
+  originRecord->rdParm[1] = originX;
+
+  extentRecord->rdSize = 5;
+  extentRecord->rdFunction = META_SETWINDOWEXT;
+  extentRecord->rdParm[0] = extentY;
+  extentRecord->rdParm[1] = extentX;
+
+  fwrite((void *)modeBuffer, sizeof(char), 8, fHandle);
+  
+  if (useOriginAndExtent)
+  {
+    fwrite((void *)originBuffer, sizeof(char), 10, fHandle);
+    fwrite((void *)extentBuffer, sizeof(char), 10, fHandle);
+  }
+
+  int ch = -2;
+  while (ch != EOF)
+  {
+    ch = getc(fd);
+    if (ch != EOF)
+    {
+      putc(ch, fHandle);
+    }
+  }
+  fclose(fHandle);
+  fclose(fd);
+  wxRemoveFile(filename);
+  wxCopyFile(tempFileBuf, filename);
+  wxRemoveFile(tempFileBuf);
+  return TRUE;
+}
+
+#endif
+