bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat)
{
wxDataFormat::NativeFormat cf = dataFormat.GetFormatId();
if ( ::IsClipboardFormatAvailable(cf) )
{
// ok from the first try
return true;
}
// for several standard formats, we can convert from some other ones too
switch ( cf )
{
// for bitmaps, DIBs will also do
case CF_BITMAP:
return ::IsClipboardFormatAvailable(CF_DIB) != 0;
#if wxUSE_ENH_METAFILE && !defined(__WXWINCE__)
case CF_METAFILEPICT:
return ::IsClipboardFormatAvailable(CF_ENHMETAFILE) != 0;
#endif // wxUSE_ENH_METAFILE
default:
return false;
}
}
size_t wxBitmapDataObject::GetDataSize(const wxDataFormat& format) const
{
if ( format.GetFormatId() == CF_DIB )
{
// create the DIB
ScreenHDC hdc;
// shouldn't be selected into a DC or GetDIBits() would fail
wxASSERT_MSG( !m_bitmap.GetSelectedInto(),
wxT("can't copy bitmap selected into wxMemoryDC") );
// first get the info
BITMAPINFO bi;
if ( !GetDIBits(hdc, (HBITMAP)m_bitmap.GetHBITMAP(), 0, 0,
NULL, &bi, DIB_RGB_COLORS) )
{
wxLogLastError(wxT("GetDIBits(NULL)"));
return 0;
}
return sizeof(BITMAPINFO) + bi.bmiHeader.biSizeImage;
}
else // CF_BITMAP
{
// no data to copy - we don't pass HBITMAP via global memory
return 0;
}
}
///////////////////////////////////////////////////////////////////////////////
// Provides support for multiple clipboard formats.
//
bool ClipboardDataObject::SetData( const wxDataFormat& format, size_t len, const void* buf )
{
bool result = false;
if ( format == GetFormat() )
{
// Editor clipboard format
result = wxCustomDataObject::SetData( format, len, buf );
}
else if ( format.IsStandard() && format.GetFormatId() == wxDF_FILENAME )
{
// File name list format. Convert to our own type of filename list.
wxFileDataObject fileData;
fileData.SetData( len, buf );
if ( fileData.GetFilenames().size() > 0 )
{
ClipboardFileListPtr fileList = new ClipboardFileList();
wxArrayString::const_iterator fileItr = fileData.GetFilenames().begin();
wxArrayString::const_iterator fileEnd = fileData.GetFilenames().end();
for ( ; fileItr != fileEnd; ++fileItr )
{
const wxChar* file = fileItr->c_str();
fileList->AddFilePath( file );
}
result = ToBuffer( fileList );
}
}
return result;
}
bool wxBitmapDataObject::SetData(const wxDataFormat& format,
size_t size, const void *pBuf)
{
HBITMAP hbmp;
if ( format.GetFormatId() == CF_DIB )
{
// here we get BITMAPINFO struct followed by the actual bitmap bits and
// BITMAPINFO starts with BITMAPINFOHEADER followed by colour info
ScreenHDC hdc;
BITMAPINFO *pbmi = (BITMAPINFO *)pBuf;
BITMAPINFOHEADER *pbmih = &pbmi->bmiHeader;
hbmp = CreateDIBitmap(hdc, pbmih, CBM_INIT,
pbmi + 1, pbmi, DIB_RGB_COLORS);
if ( !hbmp )
{
wxLogLastError(wxT("CreateDIBitmap"));
}
m_bitmap.SetWidth(pbmih->biWidth);
m_bitmap.SetHeight(pbmih->biHeight);
}
else // CF_BITMAP
{
// it's easy with bitmaps: we pass them by handle
hbmp = *(HBITMAP *)pBuf;
BITMAP bmp;
if ( !GetObject(hbmp, sizeof(BITMAP), &bmp) )
{
wxLogLastError(wxT("GetObject(HBITMAP)"));
}
m_bitmap.SetWidth(bmp.bmWidth);
m_bitmap.SetHeight(bmp.bmHeight);
m_bitmap.SetDepth(bmp.bmPlanes);
}
m_bitmap.SetHBITMAP((WXHBITMAP)hbmp);
wxASSERT_MSG( m_bitmap.IsOk(), wxT("pasting invalid bitmap") );
return true;
}
bool wxBitmapDataObject::GetDataHere(const wxDataFormat& format,
void *pBuf) const
{
wxASSERT_MSG( m_bitmap.IsOk(), wxT("copying invalid bitmap") );
HBITMAP hbmp = (HBITMAP)m_bitmap.GetHBITMAP();
if ( format.GetFormatId() == CF_DIB )
{
// create the DIB
ScreenHDC hdc;
// shouldn't be selected into a DC or GetDIBits() would fail
wxASSERT_MSG( !m_bitmap.GetSelectedInto(),
wxT("can't copy bitmap selected into wxMemoryDC") );
// first get the info
BITMAPINFO *pbi = (BITMAPINFO *)pBuf;
if ( !GetDIBits(hdc, hbmp, 0, 0, NULL, pbi, DIB_RGB_COLORS) )
{
wxLogLastError(wxT("GetDIBits(NULL)"));
return 0;
}
// and now copy the bits
if ( !GetDIBits(hdc, hbmp, 0, pbi->bmiHeader.biHeight, pbi + 1,
pbi, DIB_RGB_COLORS) )
{
wxLogLastError(wxT("GetDIBits"));
return false;
}
}
else // CF_BITMAP
{
// we put a bitmap handle into pBuf
*(HBITMAP *)pBuf = hbmp;
}
return true;
}