src/msw/metafile.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        msw/metafile.cpp
// Purpose:     wxMetafileDC etc.
// Author:      Julian Smart
// Modified by: VZ 07.01.00: implemented wxMetaFileDataObject
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/setup.h"
#endif

#ifndef WX_PRECOMP
    #include "wx/utils.h"
    #include "wx/app.h"
#endif

#include "wx/metafile.h"

#if wxUSE_METAFILE && !defined(wxMETAFILE_IS_ENH)

#include "wx/clipbrd.h"
#include "wx/msw/private.h"

#include <stdio.h>
#include <string.h>

// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxMetafile, wxObject)
IMPLEMENT_ABSTRACT_CLASS(wxMetafileDC, wxDC)

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// wxMetafileRefData
// ----------------------------------------------------------------------------

/*
 * Metafiles
 * Currently, the only purpose for making a metafile is to put
 * it on the clipboard.
 */

wxMetafileRefData::wxMetafileRefData()
{
    m_metafile = 0;
    m_windowsMappingMode = wxMM_ANISOTROPIC;
    m_width = m_height = 0;
}

wxMetafileRefData::~wxMetafileRefData()
{
    if (m_metafile)
    {
        DeleteMetaFile((HMETAFILE) m_metafile);
        m_metafile = 0;
    }
}

// ----------------------------------------------------------------------------
// wxMetafile
// ----------------------------------------------------------------------------

wxMetafile::wxMetafile(const wxString& file)
{
    m_refData = new wxMetafileRefData;

    M_METAFILEDATA->m_windowsMappingMode = wxMM_ANISOTROPIC;
    M_METAFILEDATA->m_metafile = 0;
    if (!file.empty())
        M_METAFILEDATA->m_metafile = (WXHANDLE) GetMetaFile(file);
}

wxMetafile::~wxMetafile()
{
}

bool wxMetafile::SetClipboard(int width, int height)
{
#if !wxUSE_CLIPBOARD
    return false;
#else
    if (!m_refData)
        return false;

    bool alreadyOpen = wxClipboardOpen();
    if (!alreadyOpen)
    {
        wxOpenClipboard();
        if (!wxEmptyClipboard())
            return false;
    }
    bool success = wxSetClipboardData(wxDF_METAFILE, this, width,height);
    if (!alreadyOpen)
        wxCloseClipboard();

    return success;
#endif
}

bool wxMetafile::Play(wxDC *dc)
{
    if (!m_refData)
        return false;

    dc->BeginDrawing();

    if (dc->GetHDC() && M_METAFILEDATA->m_metafile)
    {
        if ( !::PlayMetaFile(GetHdcOf(*dc), (HMETAFILE)
                             M_METAFILEDATA->m_metafile) )
        {
            wxLogLastError(_T("PlayMetaFile"));
        }
    }

    dc->EndDrawing();

    return true;
}

void wxMetafile::SetHMETAFILE(WXHANDLE mf)
{
    if (!m_refData)
        m_refData = new wxMetafileRefData;

    M_METAFILEDATA->m_metafile = mf;
}

void wxMetafile::SetWindowsMappingMode(int mm)
{
    if (!m_refData)
        m_refData = new wxMetafileRefData;

    M_METAFILEDATA->m_windowsMappingMode = mm;
}

// ----------------------------------------------------------------------------
// 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)
{
    m_metaFile = NULL;
    m_minX = 10000;
    m_minY = 10000;
    m_maxX = -10000;
    m_maxY = -10000;
    //  m_title = NULL;

    if (!file.IsNull() && wxFileExists(file))
        wxRemoveFile(file);

    if (!file.IsNull() && (file != wxEmptyString))
        m_hDC = (WXHDC) CreateMetaFile(file);
    else
        m_hDC = (WXHDC) CreateMetaFile(NULL);

    m_ok = (m_hDC != (WXHDC) 0) ;

    // Actual Windows mapping mode, for future reference.
    m_windowsMappingMode = wxMM_TEXT;

    SetMapMode(wxMM_TEXT); // NOTE: does not set HDC mapmode (this is correct)
}

// 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)
{
    m_minX = 10000;
    m_minY = 10000;
    m_maxX = -10000;
    m_maxY = -10000;
    if ( !file.IsEmpty() && wxFileExists(file))
        wxRemoveFile(file);
    m_hDC = (WXHDC) CreateMetaFile(file);

    m_ok = true;

    ::SetWindowOrgEx((HDC) m_hDC,xorg,yorg, NULL);
    ::SetWindowExtEx((HDC) m_hDC,xext,yext, NULL);

    // Actual Windows mapping mode, for future reference.
    m_windowsMappingMode = wxMM_ANISOTROPIC;

    SetMapMode(wxMM_TEXT); // NOTE: does not set HDC mapmode (this is correct)
}

wxMetafileDC::~wxMetafileDC()
{
    m_hDC = 0;
}

void wxMetafileDC::GetTextExtent(const wxString& string, long *x, long *y,
                                 long *descent, long *externalLeading, wxFont *theFont, bool WXUNUSED(use16bit)) const
{
    wxFont *fontToUse = theFont;
    if (!fontToUse)
        fontToUse = (wxFont*) &m_font;

    HDC dc = GetDC(NULL);

    SIZE sizeRect;
    TEXTMETRIC tm;
    ::GetTextExtentPoint32(dc, WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
    GetTextMetrics(dc, &tm);

    ReleaseDC(NULL, dc);

    if ( x )
        *x = sizeRect.cx;
    if ( y )
        *y = sizeRect.cy;
    if ( descent )
        *descent = tm.tmDescent;
    if ( externalLeading )
        *externalLeading = tm.tmExternalLeading;
}

void wxMetafileDC::DoGetSize(int *width, int *height) const
{
    wxCHECK_RET( m_refData, _T("invalid wxMetafileDC") );

    if ( width )
        *width = M_METAFILEDATA->m_width;
    if ( height )
        *height = M_METAFILEDATA->m_height;
}

wxMetafile *wxMetafileDC::Close()
{
    SelectOldObjects(m_hDC);
    HANDLE mf = CloseMetaFile((HDC) m_hDC);
    m_hDC = 0;
    if (mf)
    {
        wxMetafile *wx_mf = new wxMetafile;
        wx_mf->SetHMETAFILE((WXHANDLE) mf);
        wx_mf->SetWindowsMappingMode(m_windowsMappingMode);
        return wx_mf;
    }
    return NULL;
}

void wxMetafileDC::SetMapMode(int mode)
{
    m_mappingMode = mode;

    //  int pixel_width = 0;
    //  int pixel_height = 0;
    //  int mm_width = 0;
    //  int mm_height = 0;

    float mm2pixelsX = 10.0;
    float mm2pixelsY = 10.0;

    switch (mode)
    {
        case wxMM_TWIPS:
            {
                m_logicalScaleX = (float)(twips2mm * mm2pixelsX);
                m_logicalScaleY = (float)(twips2mm * mm2pixelsY);
                break;
            }
        case wxMM_POINTS:
            {
                m_logicalScaleX = (float)(pt2mm * mm2pixelsX);
                m_logicalScaleY = (float)(pt2mm * mm2pixelsY);
                break;
            }
        case wxMM_METRIC:
            {
                m_logicalScaleX = mm2pixelsX;
                m_logicalScaleY = mm2pixelsY;
                break;
            }
        case wxMM_LOMETRIC:
            {
                m_logicalScaleX = (float)(mm2pixelsX/10.0);
                m_logicalScaleY = (float)(mm2pixelsY/10.0);
                break;
            }
        default:
        case wxMM_TEXT:
            {
                m_logicalScaleX = 1.0;
                m_logicalScaleY = 1.0;
                break;
            }
    }
}

// ----------------------------------------------------------------------------
// wxMakeMetafilePlaceable
// ----------------------------------------------------------------------------

#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 = wxFopen(filename.fn_str(), _T("rb"));
    if (!fd) return false;

    wxChar tempFileBuf[256];
    wxGetTempFileName(wxT("mf"), tempFileBuf);
    FILE *fHandle = wxFopen(wxFNCONV(tempFileBuf), _T("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;
}


#if wxUSE_DRAG_AND_DROP

// ----------------------------------------------------------------------------
// wxMetafileDataObject
// ----------------------------------------------------------------------------

size_t wxMetafileDataObject::GetDataSize() const
{
    return sizeof(METAFILEPICT);
}

bool wxMetafileDataObject::GetDataHere(void *buf) const
{
    METAFILEPICT *mfpict = (METAFILEPICT *)buf;
    const wxMetafile& mf = GetMetafile();

    wxCHECK_MSG( mf.GetHMETAFILE(), false, _T("copying invalid metafile") );

    // doesn't seem to work with any other mapping mode...
    mfpict->mm   = MM_ANISOTROPIC; //mf.GetWindowsMappingMode();
    mfpict->xExt = mf.GetWidth();
    mfpict->yExt = mf.GetHeight();

    // transform the picture size to HIMETRIC units (0.01mm) - as we don't know
    // what DC the picture will be rendered to, use the default display one
    PixelToHIMETRIC(&mfpict->xExt, &mfpict->yExt);

    mfpict->hMF  = CopyMetaFile((HMETAFILE)mf.GetHMETAFILE(), NULL);

    return true;
}

bool wxMetafileDataObject::SetData(size_t WXUNUSED(len), const void *buf)
{
    const METAFILEPICT *mfpict = (const METAFILEPICT *)buf;

    wxMetafile mf;
    mf.SetWindowsMappingMode(mfpict->mm);

    LONG w = mfpict->xExt,
         h = mfpict->yExt;
    if ( mfpict->mm == MM_ANISOTROPIC )
    {
        // in this case xExt and yExt contain suggested size in HIMETRIC units
        // (0.01 mm) - transform this to something more reasonable (pixels)
        HIMETRICToPixel(&w, &h);
    }

    mf.SetWidth(w);
    mf.SetHeight(h);
    mf.SetHMETAFILE((WXHANDLE)mfpict->hMF);

    wxCHECK_MSG( mfpict->hMF, false, _T("pasting invalid metafile") );

    SetMetafile(mf);

    return true;
}

#endif // wxUSE_DRAG_AND_DROP

#endif // wxUSE_METAFILE
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: msw/metafile.cpp
	3	// Purpose: wxMetafileDC etc.
	4	// Author: Julian Smart
	5	// Modified by: VZ 07.01.00: implemented wxMetaFileDataObject
	6	// Created: 04/01/98
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	// ============================================================================
	13	// declarations
	14	// ============================================================================
	15
	16	// ----------------------------------------------------------------------------
	17	// headers
	18	// ----------------------------------------------------------------------------
	19
	20	// For compilers that support precompilation, includes "wx.h".
	21	#include "wx/wxprec.h"
	22
	23	#ifdef __BORLANDC__
	24	#pragma hdrstop
	25	#endif
	26
	27	#ifndef WX_PRECOMP
	28	#include "wx/setup.h"
	29	#endif
	30
	31	#ifndef WX_PRECOMP
	32	#include "wx/utils.h"
	33	#include "wx/app.h"
	34	#endif
	35
	36	#include "wx/metafile.h"
	37
	38	#if wxUSE_METAFILE && !defined(wxMETAFILE_IS_ENH)
	39
	40	#include "wx/clipbrd.h"
	41	#include "wx/msw/private.h"
	42
	43	#include <stdio.h>
	44	#include <string.h>
	45
	46	// ----------------------------------------------------------------------------
	47	// wxWin macros
	48	// ----------------------------------------------------------------------------
	49
	50	IMPLEMENT_DYNAMIC_CLASS(wxMetafile, wxObject)
	51	IMPLEMENT_ABSTRACT_CLASS(wxMetafileDC, wxDC)
	52
	53	// ============================================================================
	54	// implementation
	55	// ============================================================================
	56
	57	// ----------------------------------------------------------------------------
	58	// wxMetafileRefData
	59	// ----------------------------------------------------------------------------
	60
	61	/*
	62	* Metafiles
	63	* Currently, the only purpose for making a metafile is to put
	64	* it on the clipboard.
	65	*/
	66
	67	wxMetafileRefData::wxMetafileRefData()
	68	{
	69	m_metafile = 0;
	70	m_windowsMappingMode = wxMM_ANISOTROPIC;
	71	m_width = m_height = 0;
	72	}
	73
	74	wxMetafileRefData::~wxMetafileRefData()
	75	{
	76	if (m_metafile)
	77	{
	78	DeleteMetaFile((HMETAFILE) m_metafile);
	79	m_metafile = 0;
	80	}
	81	}
	82
	83	// ----------------------------------------------------------------------------
	84	// wxMetafile
	85	// ----------------------------------------------------------------------------
	86
	87	wxMetafile::wxMetafile(const wxString& file)
	88	{
	89	m_refData = new wxMetafileRefData;
	90
	91	M_METAFILEDATA->m_windowsMappingMode = wxMM_ANISOTROPIC;
	92	M_METAFILEDATA->m_metafile = 0;
	93	if (!file.empty())
	94	M_METAFILEDATA->m_metafile = (WXHANDLE) GetMetaFile(file);
	95	}
	96
	97	wxMetafile::~wxMetafile()
	98	{
	99	}
	100
	101	bool wxMetafile::SetClipboard(int width, int height)
	102	{
	103	#if !wxUSE_CLIPBOARD
	104	return false;
	105	#else
	106	if (!m_refData)
	107	return false;
	108
	109	bool alreadyOpen = wxClipboardOpen();
	110	if (!alreadyOpen)
	111	{
	112	wxOpenClipboard();
	113	if (!wxEmptyClipboard())
	114	return false;
	115	}
	116	bool success = wxSetClipboardData(wxDF_METAFILE, this, width,height);
	117	if (!alreadyOpen)
	118	wxCloseClipboard();
	119
	120	return success;
	121	#endif
	122	}
	123
	124	bool wxMetafile::Play(wxDC *dc)
	125	{
	126	if (!m_refData)
	127	return false;
	128
	129	dc->BeginDrawing();
	130
	131	if (dc->GetHDC() && M_METAFILEDATA->m_metafile)
	132	{
	133	if ( !::PlayMetaFile(GetHdcOf(*dc), (HMETAFILE)
	134	M_METAFILEDATA->m_metafile) )
	135	{
	136	wxLogLastError(_T("PlayMetaFile"));
	137	}
	138	}
	139
	140	dc->EndDrawing();
	141
	142	return true;
	143	}
	144
	145	void wxMetafile::SetHMETAFILE(WXHANDLE mf)
	146	{
	147	if (!m_refData)
	148	m_refData = new wxMetafileRefData;
	149
	150	M_METAFILEDATA->m_metafile = mf;
	151	}
	152
	153	void wxMetafile::SetWindowsMappingMode(int mm)
	154	{
	155	if (!m_refData)
	156	m_refData = new wxMetafileRefData;
	157
	158	M_METAFILEDATA->m_windowsMappingMode = mm;
	159	}
	160
	161	// ----------------------------------------------------------------------------
	162	// Metafile device context
	163	// ----------------------------------------------------------------------------
	164
	165	// Original constructor that does not takes origin and extent. If you use this,
	166	// DO give origin/extent arguments to wxMakeMetafilePlaceable.
	167	wxMetafileDC::wxMetafileDC(const wxString& file)
	168	{
	169	m_metaFile = NULL;
	170	m_minX = 10000;
	171	m_minY = 10000;
	172	m_maxX = -10000;
	173	m_maxY = -10000;
	174	// m_title = NULL;
	175
	176	if (!file.IsNull() && wxFileExists(file))
	177	wxRemoveFile(file);
	178
	179	if (!file.IsNull() && (file != wxEmptyString))
	180	m_hDC = (WXHDC) CreateMetaFile(file);
	181	else
	182	m_hDC = (WXHDC) CreateMetaFile(NULL);
	183
	184	m_ok = (m_hDC != (WXHDC) 0) ;
	185
	186	// Actual Windows mapping mode, for future reference.
	187	m_windowsMappingMode = wxMM_TEXT;
	188
	189	SetMapMode(wxMM_TEXT); // NOTE: does not set HDC mapmode (this is correct)
	190	}
	191
	192	// New constructor that takes origin and extent. If you use this, don't
	193	// give origin/extent arguments to wxMakeMetafilePlaceable.
	194	wxMetafileDC::wxMetafileDC(const wxString& file, int xext, int yext, int xorg, int yorg)
	195	{
	196	m_minX = 10000;
	197	m_minY = 10000;
	198	m_maxX = -10000;
	199	m_maxY = -10000;
	200	if ( !file.IsEmpty() && wxFileExists(file))
	201	wxRemoveFile(file);
	202	m_hDC = (WXHDC) CreateMetaFile(file);
	203
	204	m_ok = true;
	205
	206	::SetWindowOrgEx((HDC) m_hDC,xorg,yorg, NULL);
	207	::SetWindowExtEx((HDC) m_hDC,xext,yext, NULL);
	208
	209	// Actual Windows mapping mode, for future reference.
	210	m_windowsMappingMode = wxMM_ANISOTROPIC;
	211
	212	SetMapMode(wxMM_TEXT); // NOTE: does not set HDC mapmode (this is correct)
	213	}
	214
	215	wxMetafileDC::~wxMetafileDC()
	216	{
	217	m_hDC = 0;
	218	}
	219
	220	void wxMetafileDC::GetTextExtent(const wxString& string, long x, long y,
	221	long descent, long externalLeading, wxFont *theFont, bool WXUNUSED(use16bit)) const
	222	{
	223	wxFont *fontToUse = theFont;
	224	if (!fontToUse)
	225	fontToUse = (wxFont*) &m_font;
	226
	227	HDC dc = GetDC(NULL);
	228
	229	SIZE sizeRect;
	230	TEXTMETRIC tm;
	231	::GetTextExtentPoint32(dc, WXSTRINGCAST string, wxStrlen(WXSTRINGCAST string), &sizeRect);
	232	GetTextMetrics(dc, &tm);
	233
	234	ReleaseDC(NULL, dc);
	235
	236	if ( x )
	237	*x = sizeRect.cx;
	238	if ( y )
	239	*y = sizeRect.cy;
	240	if ( descent )
	241	*descent = tm.tmDescent;
	242	if ( externalLeading )
	243	*externalLeading = tm.tmExternalLeading;
	244	}
	245
	246	void wxMetafileDC::DoGetSize(int width, int height) const
	247	{
	248	wxCHECK_RET( m_refData, _T("invalid wxMetafileDC") );
	249
	250	if ( width )
	251	*width = M_METAFILEDATA->m_width;
	252	if ( height )
	253	*height = M_METAFILEDATA->m_height;
	254	}
	255
	256	wxMetafile *wxMetafileDC::Close()
	257	{
	258	SelectOldObjects(m_hDC);
	259	HANDLE mf = CloseMetaFile((HDC) m_hDC);
	260	m_hDC = 0;
	261	if (mf)
	262	{
	263	wxMetafile *wx_mf = new wxMetafile;
	264	wx_mf->SetHMETAFILE((WXHANDLE) mf);
	265	wx_mf->SetWindowsMappingMode(m_windowsMappingMode);
	266	return wx_mf;
	267	}
	268	return NULL;
	269	}
	270
	271	void wxMetafileDC::SetMapMode(int mode)
	272	{
	273	m_mappingMode = mode;
	274
	275	// int pixel_width = 0;
	276	// int pixel_height = 0;
	277	// int mm_width = 0;
	278	// int mm_height = 0;
	279
	280	float mm2pixelsX = 10.0;
	281	float mm2pixelsY = 10.0;
	282
	283	switch (mode)
	284	{
	285	case wxMM_TWIPS:
	286	{
	287	m_logicalScaleX = (float)(twips2mm * mm2pixelsX);
	288	m_logicalScaleY = (float)(twips2mm * mm2pixelsY);
	289	break;
	290	}
	291	case wxMM_POINTS:
	292	{
	293	m_logicalScaleX = (float)(pt2mm * mm2pixelsX);
	294	m_logicalScaleY = (float)(pt2mm * mm2pixelsY);
	295	break;
	296	}
	297	case wxMM_METRIC:
	298	{
	299	m_logicalScaleX = mm2pixelsX;
	300	m_logicalScaleY = mm2pixelsY;
	301	break;
	302	}
	303	case wxMM_LOMETRIC:
	304	{
	305	m_logicalScaleX = (float)(mm2pixelsX/10.0);
	306	m_logicalScaleY = (float)(mm2pixelsY/10.0);
	307	break;
	308	}
	309	default:
	310	case wxMM_TEXT:
	311	{
	312	m_logicalScaleX = 1.0;
	313	m_logicalScaleY = 1.0;
	314	break;
	315	}
	316	}
	317	}
	318
	319	// ----------------------------------------------------------------------------
	320	// wxMakeMetafilePlaceable
	321	// ----------------------------------------------------------------------------
	322
	323	#ifdef __WIN32__
	324	struct RECT32
	325	{
	326	short left;
	327	short top;
	328	short right;
	329	short bottom;
	330	};
	331
	332	struct mfPLACEABLEHEADER {
	333	DWORD key;
	334	short hmf;
	335	RECT32 bbox;
	336	WORD inch;
	337	DWORD reserved;
	338	WORD checksum;
	339	};
	340	#else
	341	struct mfPLACEABLEHEADER {
	342	DWORD key;
	343	HANDLE hmf;
	344	RECT bbox;
	345	WORD inch;
	346	DWORD reserved;
	347	WORD checksum;
	348	};
	349	#endif
	350
	351	/*
	352	* Pass filename of existing non-placeable metafile, and bounding box.
	353	* Adds a placeable metafile header, sets the mapping mode to anisotropic,
	354	* and sets the window origin and extent to mimic the wxMM_TEXT mapping mode.
	355	*
	356	*/
	357
	358	bool wxMakeMetafilePlaceable(const wxString& filename, float scale)
	359	{
	360	return wxMakeMetafilePlaceable(filename, 0, 0, 0, 0, scale, false);
	361	}
	362
	363	bool wxMakeMetafilePlaceable(const wxString& filename, int x1, int y1, int x2, int y2, float scale, bool useOriginAndExtent)
	364	{
	365	// I'm not sure if this is the correct way of suggesting a scale
	366	// to the client application, but it's the only way I can find.
	367	int unitsPerInch = (int)(576/scale);
	368
	369	mfPLACEABLEHEADER header;
	370	header.key = 0x9AC6CDD7L;
	371	header.hmf = 0;
	372	header.bbox.left = (int)(x1);
	373	header.bbox.top = (int)(y1);
	374	header.bbox.right = (int)(x2);
	375	header.bbox.bottom = (int)(y2);
	376	header.inch = unitsPerInch;
	377	header.reserved = 0;
	378
	379	// Calculate checksum
	380	WORD *p;
	381	mfPLACEABLEHEADER *pMFHead = &header;
	382	for (p =(WORD *)pMFHead,pMFHead -> checksum = 0;
	383	p < (WORD *)&pMFHead ->checksum; ++p)
	384	pMFHead ->checksum ^= *p;
	385
	386	FILE *fd = wxFopen(filename.fn_str(), _T("rb"));
	387	if (!fd) return false;
	388
	389	wxChar tempFileBuf[256];
	390	wxGetTempFileName(wxT("mf"), tempFileBuf);
	391	FILE *fHandle = wxFopen(wxFNCONV(tempFileBuf), _T("wb"));
	392	if (!fHandle)
	393	return false;
	394	fwrite((void *)&header, sizeof(unsigned char), sizeof(mfPLACEABLEHEADER), fHandle);
	395
	396	// Calculate origin and extent
	397	int originX = x1;
	398	int originY = y1;
	399	int extentX = x2 - x1;
	400	int extentY = (y2 - y1);
	401
	402	// Read metafile header and write
	403	METAHEADER metaHeader;
	404	fread((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fd);
	405
	406	if (useOriginAndExtent)
	407	metaHeader.mtSize += 15;
	408	else
	409	metaHeader.mtSize += 5;
	410
	411	fwrite((void *)&metaHeader, sizeof(unsigned char), sizeof(metaHeader), fHandle);
	412
	413	// Write SetMapMode, SetWindowOrigin and SetWindowExt records
	414	char modeBuffer[8];
	415	char originBuffer[10];
	416	char extentBuffer[10];
	417	METARECORD modeRecord = (METARECORD )&modeBuffer;
	418
	419	METARECORD originRecord = (METARECORD )&originBuffer;
	420	METARECORD extentRecord = (METARECORD )&extentBuffer;
	421
	422	modeRecord->rdSize = 4;
	423	modeRecord->rdFunction = META_SETMAPMODE;
	424	modeRecord->rdParm[0] = MM_ANISOTROPIC;
	425
	426	originRecord->rdSize = 5;
	427	originRecord->rdFunction = META_SETWINDOWORG;
	428	originRecord->rdParm[0] = originY;
	429	originRecord->rdParm[1] = originX;
	430
	431	extentRecord->rdSize = 5;
	432	extentRecord->rdFunction = META_SETWINDOWEXT;
	433	extentRecord->rdParm[0] = extentY;
	434	extentRecord->rdParm[1] = extentX;
	435
	436	fwrite((void *)modeBuffer, sizeof(char), 8, fHandle);
	437
	438	if (useOriginAndExtent)
	439	{
	440	fwrite((void *)originBuffer, sizeof(char), 10, fHandle);
	441	fwrite((void *)extentBuffer, sizeof(char), 10, fHandle);
	442	}
	443
	444	int ch = -2;
	445	while (ch != EOF)
	446	{
	447	ch = getc(fd);
	448	if (ch != EOF)
	449	{
	450	putc(ch, fHandle);
	451	}
	452	}
	453	fclose(fHandle);
	454	fclose(fd);
	455	wxRemoveFile(filename);
	456	wxCopyFile(tempFileBuf, filename);
	457	wxRemoveFile(tempFileBuf);
	458	return true;
	459	}
	460
	461
	462	#if wxUSE_DRAG_AND_DROP
	463
	464	// ----------------------------------------------------------------------------
	465	// wxMetafileDataObject
	466	// ----------------------------------------------------------------------------
	467
	468	size_t wxMetafileDataObject::GetDataSize() const
	469	{
	470	return sizeof(METAFILEPICT);
	471	}
	472
	473	bool wxMetafileDataObject::GetDataHere(void *buf) const
	474	{
	475	METAFILEPICT mfpict = (METAFILEPICT )buf;
	476	const wxMetafile& mf = GetMetafile();
	477
	478	wxCHECK_MSG( mf.GetHMETAFILE(), false, _T("copying invalid metafile") );
	479
	480	// doesn't seem to work with any other mapping mode...
	481	mfpict->mm = MM_ANISOTROPIC; //mf.GetWindowsMappingMode();
	482	mfpict->xExt = mf.GetWidth();
	483	mfpict->yExt = mf.GetHeight();
	484
	485	// transform the picture size to HIMETRIC units (0.01mm) - as we don't know
	486	// what DC the picture will be rendered to, use the default display one
	487	PixelToHIMETRIC(&mfpict->xExt, &mfpict->yExt);
	488
	489	mfpict->hMF = CopyMetaFile((HMETAFILE)mf.GetHMETAFILE(), NULL);
	490
	491	return true;
	492	}
	493
	494	bool wxMetafileDataObject::SetData(size_t WXUNUSED(len), const void *buf)
	495	{
	496	const METAFILEPICT mfpict = (const METAFILEPICT )buf;
	497
	498	wxMetafile mf;
	499	mf.SetWindowsMappingMode(mfpict->mm);
	500
	501	LONG w = mfpict->xExt,
	502	h = mfpict->yExt;
	503	if ( mfpict->mm == MM_ANISOTROPIC )
	504	{
	505	// in this case xExt and yExt contain suggested size in HIMETRIC units
	506	// (0.01 mm) - transform this to something more reasonable (pixels)
	507	HIMETRICToPixel(&w, &h);
	508	}
	509
	510	mf.SetWidth(w);
	511	mf.SetHeight(h);
	512	mf.SetHMETAFILE((WXHANDLE)mfpict->hMF);
	513
	514	wxCHECK_MSG( mfpict->hMF, false, _T("pasting invalid metafile") );
	515
	516	SetMetafile(mf);
	517
	518	return true;
	519	}
	520
	521	#endif // wxUSE_DRAG_AND_DROP
	522
	523	#endif // wxUSE_METAFILE
	524