src/msw/metafile.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/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/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;

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

    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.empty() && wxFileExists(file) )
        wxRemoveFile(file);
    m_hDC = (WXHDC) CreateMetaFile(file.empty() ? NULL : file.wx_str());

    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::DoGetTextExtent(const wxString& string,
                                   wxCoord *x, wxCoord *y,
                                   wxCoord *descent, wxCoord *externalLeading,
                                   const wxFont *theFont) const
{
    const wxFont *fontToUse = theFont;
    if (!fontToUse)
        fontToUse = &m_font;

    ScreenHDC dc;
    SelectInHDC selFont(dc, GetHfontOf(*fontToUse));

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

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