// ----------------------------------------------------------------------------
#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 <windows.h>
+#include "wx/msw/private.h" // includes <windows.h>
+
#ifdef wxUSE_NORLANDER_HEADERS
#include <ole2.h>
#endif
#include <olestd.h>
#endif
-#include "wx/msw/ole/oleutils.h"
+#include <shlobj.h>
+
+#include "wx/msw/ole/oleutils.h"
+
+#include "wx/msw/dib.h"
// ----------------------------------------------------------------------------
// functions
#define GetTymedName(tymed) ""
#endif // Debug/!Debug
-// to be moved into wx/msw/bitmap.h
-extern size_t wxConvertBitmapToDIB(BITMAPINFO *pbi, const wxBitmap& bitmap);
-extern wxBitmap wxConvertDIBToBitmap(const BITMAPINFO *bmi);
-
// ----------------------------------------------------------------------------
// wxIEnumFORMATETC interface implementation
// ----------------------------------------------------------------------------
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
// ============================================================================
break;
case wxDF_METAFILE:
+ pmedium->hGlobal = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE,
+ sizeof(METAFILEPICT));
+ if ( !pmedium->hGlobal ) {
+ wxLogLastError("GlobalAlloc");
+ return E_OUTOFMEMORY;
+ }
pmedium->tymed = TYMED_MFPICT;
break;
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);
}
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"));
- break;
-
case TYMED_HGLOBAL:
{
// copy data
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"));
- break;
-
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 ) {
// 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 ( pformatetc->cfFormat )
+ switch ( format )
{
case CF_TEXT:
case CF_OEMTEXT:
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
}
}
- wxDataFormat format = pformatetc->cfFormat;
bool ok = m_pDataObject->SetData(format, size, pBuf);
GlobalUnlock(pmedium->hGlobal);
}
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;
}
ReleaseStgMedium(pmedium);
bool wxBitmapDataObject::GetDataHere(void *buf) const
{
- return wxConvertBitmapToDIB((BITMAPINFO *)buf, GetBitmap()) != 0;
+ return wxConvertBitmapToDIB((LPBITMAPINFO)buf, GetBitmap()) != 0;
}
bool wxBitmapDataObject::SetData(size_t len, const void *buf)
{
- wxBitmap bitmap(wxConvertDIBToBitmap((const BITMAPINFO *)buf));
+ wxBitmap bitmap(wxConvertDIBToBitmap((const LPBITMAPINFO)buf));
if ( !bitmap.Ok() ) {
wxFAIL_MSG(wxT("pasting/dropping invalid bitmap"));
return TRUE;
}
-bool wxBitmapDataObject2::SetData(size_t len, const void *pBuf)
+bool wxBitmapDataObject2::SetData(size_t WXUNUSED(len), const void *pBuf)
{
HBITMAP hbmp = *(HBITMAP *)pBuf;
// 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;
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
// ----------------------------------------------------------------------------
-// otherwise VC++ would give here:
-// "local variable 'bi' may be used without having been initialized"
-// even though in fact it may not
-#ifdef __VISUALC__
- #pragma warning(disable:4701)
-#endif // __VISUALC__
+static size_t wxGetNumOfBitmapColors(size_t bitsPerPixel)
+{
+ switch ( bitsPerPixel )
+ {
+ case 1:
+ // monochrome bitmap, 2 entries
+ return 2;
+
+ case 4:
+ return 16;
-size_t wxConvertBitmapToDIB(BITMAPINFO *pbi, const wxBitmap& bitmap)
+ 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("GetObject(bitmap)");
- BITMAPINFO bi;
+ 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;
- // first get the info
+ 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, 0, NULL, pbi ? pbi : &bi, DIB_RGB_COLORS) )
+ if ( !GetDIBits(hdc, hbmp, 0, bi.biHeight, NULL, pbi, DIB_RGB_COLORS) )
{
wxLogLastError("GetDIBits(NULL)");
return 0;
}
- if ( !pbi )
+ if ( wantSizeOnly )
{
- // we were only asked for size needed for the buffer, not to actually
- // copy the data
- return sizeof(BITMAPINFO) + bi.bmiHeader.biSizeImage;
+ // size of the header + size of the image
+ return dwLen + bi.biSizeImage;
}
// and now copy the bits
- if ( !GetDIBits(hdc, hbmp, 0, pbi->bmiHeader.biHeight, pbi + 1,
- pbi, DIB_RGB_COLORS) )
+ void *image = (char *)pbi + dwLen;
+ if ( !GetDIBits(hdc, hbmp, 0, bi.biHeight, image, pbi, DIB_RGB_COLORS) )
{
wxLogLastError("GetDIBits");
return 0;
}
- return sizeof(BITMAPINFO) + pbi->bmiHeader.biSizeImage;
+ return dwLen + bi.biSizeImage;
}
-#ifdef __VISUALC__
- #pragma warning(default:4701)
-#endif // __VISUALC__
-
-wxBitmap wxConvertDIBToBitmap(const BITMAPINFO *pbmi)
+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,
- pbmi + 1, pbmi, DIB_RGB_COLORS);
+ image, pbmi, DIB_RGB_COLORS);
if ( !hbmp )
{
wxLogLastError("CreateDIBitmap");
projects / wxWidgets.git / blobdiff