X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f6aa3903841dd7e65def0a69f01523afaae7cdcc..56bd6aaca9d758663e202816e1861ee8674526e7:/src/msw/ole/dataobj.cpp diff --git a/src/msw/ole/dataobj.cpp b/src/msw/ole/dataobj.cpp index 14ae6ed6a8..b2521b7143 100644 --- a/src/msw/ole/dataobj.cpp +++ b/src/msw/ole/dataobj.cpp @@ -18,27 +18,28 @@ // ---------------------------------------------------------------------------- #ifdef __GNUG__ - #pragma implementation "dataobj.h" + #pragma implementation "dataobj.h" #endif // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #if defined(__BORLANDC__) - #pragma hdrstop + #pragma hdrstop #endif + +#if defined(__WIN32__) && !defined(__GNUWIN32_OLD__) + #ifndef WX_PRECOMP -#include "wx/intl.h" + #include "wx/intl.h" + #include "wx/log.h" #endif -#include "wx/defs.h" - -#if defined(__WIN32__) && !defined(__GNUWIN32__) || defined(wxUSE_NORLANDER_HEADERS) -#include "wx/log.h" #include "wx/dataobj.h" -#include -#ifdef wxUSE_NORLANDER_HEADERS +#include "wx/msw/private.h" // includes + +#if wxUSE_NORLANDER_HEADERS #include #endif #include @@ -48,7 +49,11 @@ #include #endif -#include "wx/msw/ole/oleutils.h" +#include + +#include "wx/msw/ole/oleutils.h" + +#include "wx/msw/dib.h" // ---------------------------------------------------------------------------- // functions @@ -56,7 +61,9 @@ #ifdef __WXDEBUG__ static const wxChar *GetTymedName(DWORD tymed); -#endif // Debug +#else // !Debug + #define GetTymedName(tymed) "" +#endif // Debug/!Debug // ---------------------------------------------------------------------------- // wxIEnumFORMATETC interface implementation @@ -66,6 +73,12 @@ class wxIEnumFORMATETC : public IEnumFORMATETC { public: wxIEnumFORMATETC(const wxDataFormat* formats, ULONG nCount); + + // to suppress the gcc warning about "class has virtual functions but non + // virtual dtor" +#ifdef __GNUG__ + virtual +#endif ~wxIEnumFORMATETC() { delete [] m_formats; } DECLARE_IUNKNOWN_METHODS; @@ -90,6 +103,12 @@ class wxIDataObject : public IDataObject { public: wxIDataObject(wxDataObject *pDataObject); + + // to suppress the gcc warning about "class has virtual functions but non + // virtual dtor" +#ifdef __GNUG__ + virtual +#endif ~wxIDataObject(); // normally, wxDataObject controls our lifetime (i.e. we're deleted when it @@ -116,22 +135,6 @@ private: bool m_mustDelete; }; -// ---------------------------------------------------------------------------- -// small helper class for getting screen DC (we're working with bitmaps and -// DIBs here) -// ---------------------------------------------------------------------------- - -class ScreenHDC -{ -public: - ScreenHDC() { m_hdc = GetDC(NULL); } - ~ScreenHDC() { ReleaseDC(NULL, m_hdc); } - operator HDC() const { return m_hdc; } - -private: - HDC m_hdc; -}; - // ============================================================================ // implementation // ============================================================================ @@ -306,7 +309,17 @@ STDMETHODIMP wxIDataObject::GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium) pmedium->tymed = TYMED_GDI; break; + case wxDF_ENHMETAFILE: + pmedium->tymed = TYMED_ENHMF; + break; + case wxDF_METAFILE: + pmedium->hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE, + sizeof(METAFILEPICT)); + if ( !pmedium->hGlobal ) { + wxLogLastError(wxT("GlobalAlloc")); + return E_OUTOFMEMORY; + } pmedium->tymed = TYMED_MFPICT; break; @@ -320,9 +333,15 @@ STDMETHODIMP wxIDataObject::GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium) return DV_E_FORMATETC; } + if ( !format.IsStandard() ) { + // for custom formats, put the size with the data - alloc the + // space for it + size += sizeof(size_t); + } + HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE, size); if ( hGlobal == NULL ) { - wxLogLastError("GlobalAlloc"); + wxLogLastError(wxT("GlobalAlloc")); return E_OUTOFMEMORY; } @@ -337,7 +356,7 @@ STDMETHODIMP wxIDataObject::GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium) hr = GetDataHere(pformatetcIn, pmedium); if ( FAILED(hr) ) { // free resources we allocated - if ( pmedium->tymed == TYMED_HGLOBAL ) { + if ( pmedium->tymed & (TYMED_HGLOBAL | TYMED_MFPICT) ) { GlobalFree(pmedium->hGlobal); } @@ -360,26 +379,37 @@ STDMETHODIMP wxIDataObject::GetDataHere(FORMATETC *pformatetc, return E_UNEXPECTED; break; - case TYMED_MFPICT: - // this should be copied on bitmaps - but I don't have time for - // this now - wxFAIL_MSG(wxT("TODO - no support for metafiles in wxDataObject")); + case TYMED_ENHMF: + if ( !m_pDataObject->GetDataHere(wxDF_ENHMETAFILE, + &pmedium->hEnhMetaFile) ) + return E_UNEXPECTED; break; + case TYMED_MFPICT: + // fall through - we pass METAFILEPICT through HGLOBAL + case TYMED_HGLOBAL: { // copy data - void *pBuf = GlobalLock(pmedium->hGlobal); + HGLOBAL hGlobal = pmedium->hGlobal; + void *pBuf = GlobalLock(hGlobal); if ( pBuf == NULL ) { wxLogLastError(wxT("GlobalLock")); return E_OUTOFMEMORY; } - wxDataFormat format = (wxDataFormatId)pformatetc->cfFormat; + if ( !wxDataFormat(pformatetc->cfFormat).IsStandard() ) { + // for custom formats, put the size with the data + size_t *p = (size_t *)pBuf; + *p++ = GlobalSize(hGlobal); + pBuf = p; + } + + wxDataFormat format = pformatetc->cfFormat; if ( !m_pDataObject->GetDataHere(format, pBuf) ) return E_UNEXPECTED; - GlobalUnlock(pmedium->hGlobal); + GlobalUnlock(hGlobal); } break; @@ -390,7 +420,7 @@ STDMETHODIMP wxIDataObject::GetDataHere(FORMATETC *pformatetc, return S_OK; } -// set data functions (not implemented) +// set data functions STDMETHODIMP wxIDataObject::SetData(FORMATETC *pformatetc, STGMEDIUM *pmedium, BOOL fRelease) @@ -400,29 +430,96 @@ STDMETHODIMP wxIDataObject::SetData(FORMATETC *pformatetc, switch ( pmedium->tymed ) { case TYMED_GDI: - m_pDataObject->SetData(wxDF_BITMAP, &pmedium->hBitmap); + m_pDataObject->SetData(wxDF_BITMAP, 0, &pmedium->hBitmap); break; - case TYMED_MFPICT: - // this should be copied on bitmaps - but I don't have time for - // this now - wxFAIL_MSG(wxT("TODO - no support for metafiles in wxDataObject")); + case TYMED_ENHMF: + m_pDataObject->SetData(wxDF_ENHMETAFILE, 0, &pmedium->hEnhMetaFile); break; + case TYMED_MFPICT: + // fall through - we pass METAFILEPICT through HGLOBAL case TYMED_HGLOBAL: { + wxDataFormat format = pformatetc->cfFormat; + + // this is quite weird, but for file drag and drop, explorer + // calls our SetData() with the formats we do *not* support! + // + // as we can't fix this bug in explorer (it's a bug because it + // should only use formats returned by EnumFormatEtc), do the + // check here + if ( !m_pDataObject->IsSupportedFormat(format) ) { + // go away! + return DV_E_FORMATETC; + } + // copy data void *pBuf = GlobalLock(pmedium->hGlobal); if ( pBuf == NULL ) { - wxLogLastError("GlobalLock"); + wxLogLastError(wxT("GlobalLock")); return E_OUTOFMEMORY; } - wxDataFormat format = (wxDataFormatId)pformatetc->cfFormat; - m_pDataObject->SetData(format, pBuf); + // we've got a problem with SetData() here because the base + // class version requires the size parameter which we don't + // have anywhere in OLE data transfer - so we need to + // synthetise it for known formats and we suppose that all data + // in custom formats starts with a DWORD containing the size + size_t size; + switch ( format ) + { + case CF_TEXT: + case CF_OEMTEXT: + size = strlen((const char *)pBuf); + break; +#if !defined(__WATCOMC__) && ! (defined(__BORLANDC__) && (__BORLANDC__ < 0x500)) + case CF_UNICODETEXT: +#if (defined(__BORLANDC__) && (__BORLANDC__ > 0x530)) + size = std::wcslen((const wchar_t *)pBuf); +#else + size = ::wcslen((const wchar_t *)pBuf); +#endif + break; +#endif + case CF_BITMAP: + case CF_HDROP: + // these formats don't use size at all, anyhow (but + // pass data by handle, which is always a single DWORD) + size = 0; + break; + + case CF_DIB: + // the handler will calculate size itself (it's too + // complicated to do it here) + size = 0; + break; + + case CF_METAFILEPICT: + size = sizeof(METAFILEPICT); + break; + + default: + { + // we suppose that the size precedes the data + size_t *p = (size_t *)pBuf; + size = *p++; + pBuf = p; + if (! format.IsStandard() ) { + // see GetData for coresponding increment + size -= sizeof(size_t); + } + } + } + + bool ok = m_pDataObject->SetData(format, size, pBuf); GlobalUnlock(pmedium->hGlobal); + + if ( !ok ) { + return E_UNEXPECTED; + } } break; @@ -431,11 +528,21 @@ STDMETHODIMP wxIDataObject::SetData(FORMATETC *pformatetc, } if ( fRelease ) { - // we own the medium, so we must release it - but do *not* free the - // bitmap handle fi we have it because we have copied it elsewhere - if ( pmedium->tymed == TYMED_GDI ) + // we own the medium, so we must release it - but do *not* free any + // data we pass by handle because we have copied it elsewhere + switch ( pmedium->tymed ) { - pmedium->hBitmap = 0; + case TYMED_GDI: + pmedium->hBitmap = 0; + break; + + case TYMED_MFPICT: + pmedium->hMetaFilePict = 0; + break; + + case TYMED_ENHMF: + pmedium->hEnhMetaFile = 0; + break; } ReleaseStgMedium(pmedium); @@ -474,19 +581,16 @@ STDMETHODIMP wxIDataObject::QueryGetData(FORMATETC *pformatetc) } // and now check the type of data requested - wxDataFormat format = (wxDataFormatId)pformatetc->cfFormat; + wxDataFormat format = pformatetc->cfFormat; if ( m_pDataObject->IsSupportedFormat(format) ) { -#ifdef __WXDEBUG__ wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::QueryGetData: %s ok"), - wxDataObject::GetFormatName(format)); -#endif // Debug + wxGetFormatName(format)); } else { -#ifdef __WXDEBUG__ wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::QueryGetData: %s unsupported"), - wxDataObject::GetFormatName(format)); -#endif + wxGetFormatName(format)); + return DV_E_FORMATETC; } @@ -495,13 +599,11 @@ STDMETHODIMP wxIDataObject::QueryGetData(FORMATETC *pformatetc) if ( (format == wxDF_BITMAP && !(tymed & TYMED_GDI)) && !(tymed & TYMED_HGLOBAL) ) { // it's not what we're waiting for -#ifdef __WXDEBUG__ wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::QueryGetData: %s != %s"), GetTymedName(tymed), GetTymedName(format == wxDF_BITMAP ? TYMED_GDI : TYMED_HGLOBAL)); -#endif // Debug return DV_E_TYMED; } @@ -521,25 +623,18 @@ STDMETHODIMP wxIDataObject::GetCanonicalFormatEtc(FORMATETC *pFormatetcIn, return DATA_S_SAMEFORMATETC; } -STDMETHODIMP wxIDataObject::EnumFormatEtc(DWORD dwDirection, +STDMETHODIMP wxIDataObject::EnumFormatEtc(DWORD dwDir, IEnumFORMATETC **ppenumFormatEtc) { wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::EnumFormatEtc")); - bool allowOutputOnly = dwDirection == DATADIR_GET; + wxDataObject::Direction dir = dwDir == DATADIR_GET ? wxDataObject::Get + : wxDataObject::Set; - size_t nFormatCount = m_pDataObject->GetFormatCount(allowOutputOnly); + size_t nFormatCount = m_pDataObject->GetFormatCount(dir); wxDataFormat format, *formats; - if ( nFormatCount == 1 ) { - // this is the most common case, this is why we consider it separately - formats = &format; - format = m_pDataObject->GetPreferredFormat(); - } - else { - // bad luck, build the array with all formats - formats = new wxDataFormat[nFormatCount]; - m_pDataObject->GetAllFormats(formats, allowOutputOnly); - } + formats = nFormatCount == 1 ? &format : new wxDataFormat[nFormatCount]; + m_pDataObject->GetAllFormats(formats, dir); wxIEnumFORMATETC *pEnum = new wxIEnumFORMATETC(formats, nFormatCount); pEnum->AddRef(); @@ -552,7 +647,10 @@ STDMETHODIMP wxIDataObject::EnumFormatEtc(DWORD dwDirection, return S_OK; } +// ---------------------------------------------------------------------------- // advise sink functions (not implemented) +// ---------------------------------------------------------------------------- + STDMETHODIMP wxIDataObject::DAdvise(FORMATETC *pformatetc, DWORD advf, IAdviseSink *pAdvSink, @@ -595,127 +693,127 @@ void wxDataObject::SetAutoDelete() m_pIDataObject = NULL; } -bool wxDataObject::IsSupportedFormat(const wxDataFormat& format) const -{ - size_t nFormatCount = GetFormatCount(); - if ( nFormatCount == 1 ) { - return format == GetPreferredFormat(); - } - else { - wxDataFormat *formats = new wxDataFormat[nFormatCount]; - GetAllFormats(formats); +#ifdef __WXDEBUG__ - size_t n; - for ( n = 0; n < nFormatCount; n++ ) { - if ( formats[n] == format ) - break; - } +const wxChar *wxDataObject::GetFormatName(wxDataFormat format) +{ + // case 'xxx' is not a valid value for switch of enum 'wxDataFormat' + #ifdef __VISUALC__ + #pragma warning(disable:4063) + #endif // VC++ + + static wxChar s_szBuf[256]; + switch ( format ) { + case CF_TEXT: return wxT("CF_TEXT"); + case CF_BITMAP: return wxT("CF_BITMAP"); + case CF_METAFILEPICT: return wxT("CF_METAFILEPICT"); + case CF_SYLK: return wxT("CF_SYLK"); + case CF_DIF: return wxT("CF_DIF"); + case CF_TIFF: return wxT("CF_TIFF"); + case CF_OEMTEXT: return wxT("CF_OEMTEXT"); + case CF_DIB: return wxT("CF_DIB"); + case CF_PALETTE: return wxT("CF_PALETTE"); + case CF_PENDATA: return wxT("CF_PENDATA"); + case CF_RIFF: return wxT("CF_RIFF"); + case CF_WAVE: return wxT("CF_WAVE"); + case CF_UNICODETEXT: return wxT("CF_UNICODETEXT"); + case CF_ENHMETAFILE: return wxT("CF_ENHMETAFILE"); + case CF_HDROP: return wxT("CF_HDROP"); + case CF_LOCALE: return wxT("CF_LOCALE"); - delete [] formats; + default: + if ( !::GetClipboardFormatName(format, s_szBuf, WXSIZEOF(s_szBuf)) ) + { + // it must be a new predefined format we don't know the name of + wxSprintf(s_szBuf, wxT("unknown CF (0x%04x)"), format.GetFormatId()); + } - // found? - return n < nFormatCount; + return s_szBuf; } -} -#ifdef __WXDEBUG__ -const char *wxDataObject::GetFormatName(wxDataFormat format) -{ - // case 'xxx' is not a valid value for switch of enum 'wxDataFormat' - #ifdef __VISUALC__ - #pragma warning(disable:4063) - #endif // VC++ - - static char s_szBuf[128]; - switch ( format ) { - case CF_TEXT: return "CF_TEXT"; - case CF_BITMAP: return "CF_BITMAP"; - case CF_METAFILEPICT: return "CF_METAFILEPICT"; - case CF_SYLK: return "CF_SYLK"; - case CF_DIF: return "CF_DIF"; - case CF_TIFF: return "CF_TIFF"; - case CF_OEMTEXT: return "CF_OEMTEXT"; - case CF_DIB: return "CF_DIB"; - case CF_PALETTE: return "CF_PALETTE"; - case CF_PENDATA: return "CF_PENDATA"; - case CF_RIFF: return "CF_RIFF"; - case CF_WAVE: return "CF_WAVE"; - case CF_UNICODETEXT: return "CF_UNICODETEXT"; - case CF_ENHMETAFILE: return "CF_ENHMETAFILE"; - case CF_HDROP: return "CF_HDROP"; - case CF_LOCALE: return "CF_LOCALE"; - default: - sprintf(s_szBuf, "clipboard format 0x%x (unknown)", format); - return s_szBuf; - } - - #ifdef __VISUALC__ - #pragma warning(default:4063) - #endif // VC++ + #ifdef __VISUALC__ + #pragma warning(default:4063) + #endif // VC++ } + #endif // Debug // ---------------------------------------------------------------------------- -// wxPrivateDataObject +// wxBitmapDataObject supports CF_DIB format // ---------------------------------------------------------------------------- -wxPrivateDataObject::wxPrivateDataObject() +size_t wxBitmapDataObject::GetDataSize() const { - m_size = 0; - m_data = NULL; + return wxConvertBitmapToDIB(NULL, GetBitmap()); } -void wxPrivateDataObject::Free() +bool wxBitmapDataObject::GetDataHere(void *buf) const { - if ( m_data ) - free(m_data); + return wxConvertBitmapToDIB((LPBITMAPINFO)buf, GetBitmap()) != 0; } -void wxPrivateDataObject::SetData( const void *data, size_t size ) +bool wxBitmapDataObject::SetData(size_t len, const void *buf) { - Free(); + wxBitmap bitmap(wxConvertDIBToBitmap((const LPBITMAPINFO)buf)); - m_size = size; - m_data = malloc(size); + if ( !bitmap.Ok() ) { + wxFAIL_MSG(wxT("pasting/dropping invalid bitmap")); - memcpy( m_data, data, size ); + return FALSE; + } + + SetBitmap(bitmap); + + return TRUE; } -void wxPrivateDataObject::WriteData( void *dest ) const +// ---------------------------------------------------------------------------- +// wxBitmapDataObject2 supports CF_BITMAP format +// ---------------------------------------------------------------------------- + +// the bitmaps aren't passed by value as other types of data (i.e. by copying +// the data into a global memory chunk and passing it to the clipboard or +// another application or whatever), but by handle, so these generic functions +// don't make much sense to them. + +size_t wxBitmapDataObject2::GetDataSize() const { - WriteData( m_data, dest ); + return 0; } -size_t wxPrivateDataObject::GetSize() const +bool wxBitmapDataObject2::GetDataHere(void *pBuf) const { - return m_size; + // we put a bitmap handle into pBuf + *(WXHBITMAP *)pBuf = GetBitmap().GetHBITMAP(); + + return TRUE; } -void wxPrivateDataObject::WriteData( const void *data, void *dest ) const +bool wxBitmapDataObject2::SetData(size_t WXUNUSED(len), const void *pBuf) { - memcpy( dest, data, GetSize() ); -} + HBITMAP hbmp = *(HBITMAP *)pBuf; -// ---------------------------------------------------------------------------- -// wxBitmapDataObject: it supports standard CF_BITMAP and CF_DIB formats -// ---------------------------------------------------------------------------- + BITMAP bmp; + if ( !GetObject(hbmp, sizeof(BITMAP), &bmp) ) + { + wxLogLastError(wxT("GetObject(HBITMAP)")); + } -size_t wxBitmapDataObject::GetFormatCount(bool outputOnlyToo) const -{ - return 2; -} + wxBitmap bitmap(bmp.bmWidth, bmp.bmHeight, bmp.bmPlanes); + bitmap.SetHBITMAP((WXHBITMAP)hbmp); -void wxBitmapDataObject::GetAllFormats(wxDataFormat *formats, - bool outputOnlyToo) const -{ - formats[0] = CF_BITMAP; - formats[1] = CF_DIB; + if ( !bitmap.Ok() ) { + wxFAIL_MSG(wxT("pasting/dropping invalid bitmap")); + + return FALSE; + } + + SetBitmap(bitmap); + + return TRUE; } -// the bitmaps aren't passed by value as other types of data (i.e. by copyign -// the data into a global memory chunk and passing it to the clipboard or -// another application or whatever), but by handle, so these generic functions -// don't make much sense to them. +#if 0 size_t wxBitmapDataObject::GetDataSize(const wxDataFormat& format) const { @@ -733,7 +831,7 @@ size_t wxBitmapDataObject::GetDataSize(const wxDataFormat& format) const if ( !GetDIBits(hdc, (HBITMAP)m_bitmap.GetHBITMAP(), 0, 0, NULL, &bi, DIB_RGB_COLORS) ) { - wxLogLastError("GetDIBits(NULL)"); + wxLogLastError(wxT("GetDIBits(NULL)")); return 0; } @@ -766,7 +864,7 @@ bool wxBitmapDataObject::GetDataHere(const wxDataFormat& format, BITMAPINFO *pbi = (BITMAPINFO *)pBuf; if ( !GetDIBits(hdc, hbmp, 0, 0, NULL, pbi, DIB_RGB_COLORS) ) { - wxLogLastError("GetDIBits(NULL)"); + wxLogLastError(wxT("GetDIBits(NULL)")); return 0; } @@ -775,7 +873,7 @@ bool wxBitmapDataObject::GetDataHere(const wxDataFormat& format, if ( !GetDIBits(hdc, hbmp, 0, pbi->bmiHeader.biHeight, pbi + 1, pbi, DIB_RGB_COLORS) ) { - wxLogLastError("GetDIBits"); + wxLogLastError(wxT("GetDIBits")); return FALSE; } @@ -789,7 +887,8 @@ bool wxBitmapDataObject::GetDataHere(const wxDataFormat& format, return TRUE; } -bool wxBitmapDataObject::SetData(const wxDataFormat& format, const void *pBuf) +bool wxBitmapDataObject::SetData(const wxDataFormat& format, + size_t size, const void *pBuf) { HBITMAP hbmp; if ( format.GetFormatId() == CF_DIB ) @@ -804,7 +903,7 @@ bool wxBitmapDataObject::SetData(const wxDataFormat& format, const void *pBuf) pbmi + 1, pbmi, DIB_RGB_COLORS); if ( !hbmp ) { - wxLogLastError("CreateDIBitmap"); + wxLogLastError(wxT("CreateDIBitmap")); } m_bitmap.SetWidth(pbmih->biWidth); @@ -818,7 +917,7 @@ bool wxBitmapDataObject::SetData(const wxDataFormat& format, const void *pBuf) BITMAP bmp; if ( !GetObject(hbmp, sizeof(BITMAP), &bmp) ) { - wxLogLastError("GetObject(HBITMAP)"); + wxLogLastError(wxT("GetObject(HBITMAP)")); } m_bitmap.SetWidth(bmp.bmWidth); @@ -833,10 +932,250 @@ bool wxBitmapDataObject::SetData(const wxDataFormat& format, const void *pBuf) return TRUE; } +#endif // 0 + +// ---------------------------------------------------------------------------- +// wxFileDataObject +// ---------------------------------------------------------------------------- + +bool wxFileDataObject::SetData(size_t WXUNUSED(size), const void *pData) +{ + m_filenames.Empty(); + + // the documentation states that the first member of DROPFILES structure is + // a "DWORD offset of double NUL terminated file list". What they mean by + // this (I wonder if you see it immediately) is that the list starts at + // ((char *)&(pDropFiles.pFiles)) + pDropFiles.pFiles. We're also advised + // to use DragQueryFile to work with this structure, but not told where and + // how to get HDROP. + HDROP hdrop = (HDROP)pData; // NB: it works, but I'm not sure about it + + // get number of files (magic value -1) + UINT nFiles = ::DragQueryFile(hdrop, (unsigned)-1, NULL, 0u); + + wxCHECK_MSG ( nFiles != (UINT)-1, FALSE, wxT("wrong HDROP handle") ); + + // for each file get the length, allocate memory and then get the name + wxString str; + UINT len, n; + for ( n = 0; n < nFiles; n++ ) { + // +1 for terminating NUL + len = ::DragQueryFile(hdrop, n, NULL, 0) + 1; + + UINT len2 = ::DragQueryFile(hdrop, n, str.GetWriteBuf(len), len); + str.UngetWriteBuf(); + m_filenames.Add(str); + + if ( len2 != len - 1 ) { + wxLogDebug(wxT("In wxFileDropTarget::OnDrop DragQueryFile returned\ + %d characters, %d expected."), len2, len - 1); + } + } + + return TRUE; +} + +void wxFileDataObject::AddFile(const wxString& file) +{ + // just add file to filenames array + // all useful data (such as DROPFILES struct) will be + // created later as necessary + m_filenames.Add(file); +} + +size_t wxFileDataObject::GetDataSize() const +{ + // size returned will be the size of the DROPFILES structure, + // plus the list of filesnames (null byte separated), plus + // a double null at the end + + // if no filenames in list, size is 0 + if ( m_filenames.GetCount() == 0 ) + return 0; + + // inital size of DROPFILES struct + null byte + size_t sz = sizeof(DROPFILES) + 1; + + size_t count = m_filenames.GetCount(); + for ( size_t i = 0; i < count; i++ ) + { + // add filename length plus null byte + sz += m_filenames[i].Len() + 1; + } + + return sz; +} + +bool wxFileDataObject::GetDataHere(void *pData) const +{ + // pData points to an externally allocated memory block + // created using the size returned by GetDataSize() + + // if pData is NULL, or there are no files, return + if ( !pData || m_filenames.GetCount() == 0 ) + return FALSE; + + // convert data pointer to a DROPFILES struct pointer + LPDROPFILES pDrop = (LPDROPFILES) pData; + + // initialize DROPFILES struct + pDrop->pFiles = sizeof(DROPFILES); + pDrop->fNC = FALSE; // not non-client coords +#if wxUSE_UNICODE + pDrop->fWide = TRUE; +#else // ANSI + pDrop->fWide = FALSE; +#endif // Unicode/Ansi + + // set start of filenames list (null separated) + wxChar *pbuf = (wxChar*) ((BYTE *)pDrop + sizeof(DROPFILES)); + + size_t count = m_filenames.GetCount(); + for (size_t i = 0; i < count; i++ ) + { + // copy filename to pbuf and add null terminator + size_t len = m_filenames[i].Len(); + memcpy(pbuf, m_filenames[i], len); + pbuf += len; + *pbuf++ = wxT('\0'); + } + + *pbuf = wxT('\0'); // add final null terminator + + return TRUE; +} + // ---------------------------------------------------------------------------- // private functions // ---------------------------------------------------------------------------- +static size_t wxGetNumOfBitmapColors(size_t bitsPerPixel) +{ + switch ( bitsPerPixel ) + { + case 1: + // monochrome bitmap, 2 entries + return 2; + + case 4: + return 16; + + case 8: + return 256; + + case 24: + // may be used with 24bit bitmaps, but we don't use it here - fall + // through + + case 16: + case 32: + // bmiColors not used at all with these bitmaps + return 0; + + default: + wxFAIL_MSG( wxT("unknown bitmap format") ); + return 0; + } +} + +size_t wxConvertBitmapToDIB(LPBITMAPINFO pbi, const wxBitmap& bitmap) +{ + wxASSERT_MSG( bitmap.Ok(), wxT("invalid bmp can't be converted to DIB") ); + + // shouldn't be selected into a DC or GetDIBits() would fail + wxASSERT_MSG( !bitmap.GetSelectedInto(), + wxT("can't copy bitmap selected into wxMemoryDC") ); + + // prepare all the info we need + BITMAP bm; + HBITMAP hbmp = (HBITMAP)bitmap.GetHBITMAP(); + if ( !GetObject(hbmp, sizeof(bm), &bm) ) + { + wxLogLastError(wxT("GetObject(bitmap)")); + + return 0; + } + + // calculate the number of bits per pixel and the number of items in + // bmiColors array (whose meaning depends on the bitmap format) + WORD biBits = bm.bmPlanes * bm.bmBitsPixel; + WORD biColors = wxGetNumOfBitmapColors(biBits); + + BITMAPINFO bi2; + + bool wantSizeOnly = pbi == NULL; + if ( wantSizeOnly ) + pbi = &bi2; + + // just for convenience + BITMAPINFOHEADER& bi = pbi->bmiHeader; + + bi.biSize = sizeof(BITMAPINFOHEADER); + bi.biWidth = bm.bmWidth; + bi.biHeight = bm.bmHeight; + bi.biPlanes = 1; + bi.biBitCount = biBits; + bi.biCompression = BI_RGB; + bi.biSizeImage = 0; + bi.biXPelsPerMeter = 0; + bi.biYPelsPerMeter = 0; + bi.biClrUsed = 0; + bi.biClrImportant = 0; + + // memory we need for BITMAPINFO only + DWORD dwLen = bi.biSize + biColors * sizeof(RGBQUAD); + + // first get the image size + ScreenHDC hdc; + if ( !GetDIBits(hdc, hbmp, 0, bi.biHeight, NULL, pbi, DIB_RGB_COLORS) ) + { + wxLogLastError(wxT("GetDIBits(NULL)")); + + return 0; + } + + if ( wantSizeOnly ) + { + // size of the header + size of the image + return dwLen + bi.biSizeImage; + } + + // and now copy the bits + void *image = (char *)pbi + dwLen; + if ( !GetDIBits(hdc, hbmp, 0, bi.biHeight, image, pbi, DIB_RGB_COLORS) ) + { + wxLogLastError(wxT("GetDIBits")); + + return 0; + } + + return dwLen + bi.biSizeImage; +} + +wxBitmap wxConvertDIBToBitmap(const LPBITMAPINFO pbmi) +{ + // here we get BITMAPINFO struct followed by the actual bitmap bits and + // BITMAPINFO starts with BITMAPINFOHEADER followed by colour info + const BITMAPINFOHEADER *pbmih = &pbmi->bmiHeader; + + // offset of image from the beginning of the header + DWORD ofs = wxGetNumOfBitmapColors(pbmih->biBitCount) * sizeof(RGBQUAD); + void *image = (char *)pbmih + sizeof(BITMAPINFOHEADER) + ofs; + + ScreenHDC hdc; + HBITMAP hbmp = CreateDIBitmap(hdc, pbmih, CBM_INIT, + image, pbmi, DIB_RGB_COLORS); + if ( !hbmp ) + { + wxLogLastError(wxT("CreateDIBitmap")); + } + + wxBitmap bitmap(pbmih->biWidth, pbmih->biHeight, pbmih->biBitCount); + bitmap.SetHBITMAP((WXHBITMAP)hbmp); + + return bitmap; +} + #ifdef __WXDEBUG__ static const wxChar *GetTymedName(DWORD tymed) @@ -851,7 +1190,7 @@ static const wxChar *GetTymedName(DWORD tymed) case TYMED_MFPICT: return wxT("TYMED_MFPICT"); case TYMED_ENHMF: return wxT("TYMED_ENHMF"); default: - wxSprintf(s_szBuf, wxT("type of media format %d (unknown)"), tymed); + wxSprintf(s_szBuf, wxT("type of media format %ld (unknown)"), tymed); return s_szBuf; } }