src/msw/clipbrd.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        clipbrd.cpp
   3 // Purpose:     Clipboard functionality
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "clipbrd.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/setup.h"
  33 #endif
  34
  35 #if wxUSE_CLIPBOARD
  36
  37 #ifndef WX_PRECOMP
  38     #include "wx/object.h"
  39     #include "wx/event.h"
  40     #include "wx/app.h"
  41     #include "wx/frame.h"
  42     #include "wx/bitmap.h"
  43     #include "wx/utils.h"
  44     #include "wx/intl.h"
  45 #endif
  46
  47 #if wxUSE_METAFILE
  48     #include "wx/metafile.h"
  49 #endif
  50
  51 #include "wx/log.h"
  52 #include "wx/clipbrd.h"
  53
  54 #include <string.h>
  55 #include <windows.h>
  56
  57 #include "wx/msw/private.h"
  58 #include "wx/msw/dib.h"
  59
  60 // wxDataObject is tied to OLE/drag and drop implementation, therefore so are
  61 // the functions using wxDataObject in wxClipboard
  62 #define wxUSE_DATAOBJ wxUSE_DRAG_AND_DROP
  63
  64 #if wxUSE_DATAOBJ
  65     #include "wx/dataobj.h"
  66
  67     // use OLE clipboard
  68     #define wxUSE_OLE_CLIPBOARD 1
  69 #else // !wxUSE_DATAOBJ
  70     // use Win clipboard API
  71     #define wxUSE_OLE_CLIPBOARD 0
  72 #endif
  73
  74 #if wxUSE_OLE_CLIPBOARD
  75     #include <ole2.h>
  76 #endif // wxUSE_OLE_CLIPBOARD
  77
  78 #ifdef __WIN16__
  79     #define memcpy hmemcpy
  80 #endif
  81
  82 // ===========================================================================
  83 // implementation
  84 // ===========================================================================
  85
  86 // ---------------------------------------------------------------------------
  87 // old-style clipboard functions using Windows API
  88 // ---------------------------------------------------------------------------
  89
  90 static bool gs_wxClipboardIsOpen = FALSE;
  91
  92 bool wxOpenClipboard()
  93 {
  94     wxCHECK_MSG( !gs_wxClipboardIsOpen, TRUE, wxT("clipboard already opened.") );
  95
  96     wxWindow *win = wxTheApp->GetTopWindow();
  97     if ( win )
  98     {
  99         gs_wxClipboardIsOpen = ::OpenClipboard((HWND)win->GetHWND()) != 0;
 100
 101         if ( !gs_wxClipboardIsOpen )
 102             wxLogSysError(_("Failed to open the clipboard."));
 103
 104         return gs_wxClipboardIsOpen;
 105     }
 106     else
 107     {
 108         wxLogDebug(wxT("Can not open clipboard without a main window."));
 109
 110         return FALSE;
 111     }
 112 }
 113
 114 bool wxCloseClipboard()
 115 {
 116     wxCHECK_MSG( gs_wxClipboardIsOpen, FALSE, wxT("clipboard is not opened") );
 117
 118     gs_wxClipboardIsOpen = FALSE;
 119
 120     if ( ::CloseClipboard() == 0 )
 121     {
 122         wxLogSysError(_("Failed to close the clipboard."));
 123
 124         return FALSE;
 125     }
 126
 127     return TRUE;
 128 }
 129
 130 bool wxEmptyClipboard()
 131 {
 132     if ( ::EmptyClipboard() == 0 )
 133     {
 134         wxLogSysError(_("Failed to empty the clipboard."));
 135
 136         return FALSE;
 137     }
 138
 139     return TRUE;
 140 }
 141
 142 bool wxIsClipboardOpened()
 143 {
 144   return gs_wxClipboardIsOpen;
 145 }
 146
 147 bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat)
 148 {
 149     // for bitmaps, DIBs will also do
 150     return (::IsClipboardFormatAvailable(dataFormat) != 0) ||
 151            (dataFormat.GetFormatId() == CF_BITMAP &&
 152             ::IsClipboardFormatAvailable(CF_DIB));
 153 }
 154
 155 bool wxSetClipboardData(wxDataFormat dataFormat,
 156                         const void *data,
 157                         int width, int height)
 158 {
 159     HANDLE handle = 0; // return value of SetClipboardData
 160
 161     switch (dataFormat)
 162     {
 163         case wxDF_BITMAP:
 164             {
 165                 wxBitmap *bitmap = (wxBitmap *)data;
 166
 167                 HDC hdcMem = CreateCompatibleDC((HDC) NULL);
 168                 HDC hdcSrc = CreateCompatibleDC((HDC) NULL);
 169                 HBITMAP old = (HBITMAP)
 170                     ::SelectObject(hdcSrc, (HBITMAP)bitmap->GetHBITMAP());
 171                 HBITMAP hBitmap = CreateCompatibleBitmap(hdcSrc,
 172                                                          bitmap->GetWidth(),
 173                                                          bitmap->GetHeight());
 174                 if (!hBitmap)
 175                 {
 176                     SelectObject(hdcSrc, old);
 177                     DeleteDC(hdcMem);
 178                     DeleteDC(hdcSrc);
 179                     return FALSE;
 180                 }
 181
 182                 HBITMAP old1 = (HBITMAP) SelectObject(hdcMem, hBitmap);
 183                 BitBlt(hdcMem, 0, 0, bitmap->GetWidth(), bitmap->GetHeight(),
 184                        hdcSrc, 0, 0, SRCCOPY);
 185
 186                 // Select new bitmap out of memory DC
 187                 SelectObject(hdcMem, old1);
 188
 189                 // Set the data
 190                 handle = ::SetClipboardData(CF_BITMAP, hBitmap);
 191
 192                 // Clean up
 193                 SelectObject(hdcSrc, old);
 194                 DeleteDC(hdcSrc);
 195                 DeleteDC(hdcMem);
 196                 break;
 197             }
 198
 199         case wxDF_DIB:
 200             {
 201 #if wxUSE_IMAGE_LOADING_IN_MSW
 202                 wxBitmap *bitmap = (wxBitmap *)data;
 203                 HBITMAP hBitmap = (HBITMAP)bitmap->GetHBITMAP();
 204                 // NULL palette means to use the system one
 205                 HANDLE hDIB = wxBitmapToDIB(hBitmap, (HPALETTE)NULL);
 206                 handle = SetClipboardData(CF_DIB, hDIB);
 207 #endif // wxUSE_IMAGE_LOADING_IN_MSW
 208                 break;
 209             }
 210
 211 #if wxUSE_METAFILE
 212         case wxDF_METAFILE:
 213             {
 214                 wxMetafile *wxMF = (wxMetafile *)data;
 215                 HANDLE data = GlobalAlloc(GHND, sizeof(METAFILEPICT) + 1);
 216                 METAFILEPICT *mf = (METAFILEPICT *)GlobalLock(data);
 217
 218                 mf->mm = wxMF->GetWindowsMappingMode();
 219                 mf->xExt = width;
 220                 mf->yExt = height;
 221                 mf->hMF = (HMETAFILE) wxMF->GetHMETAFILE();
 222                 GlobalUnlock(data);
 223                 wxMF->SetHMETAFILE((WXHANDLE) NULL);
 224
 225                 handle = SetClipboardData(CF_METAFILEPICT, data);
 226                 break;
 227             }
 228 #endif
 229         case CF_SYLK:
 230         case CF_DIF:
 231         case CF_TIFF:
 232         case CF_PALETTE:
 233         default:
 234             {
 235                 wxLogError(_("Unsupported clipboard format."));
 236                 return FALSE;
 237             }
 238
 239         case wxDF_OEMTEXT:
 240             dataFormat = wxDF_TEXT;
 241             // fall through
 242
 243         case wxDF_TEXT:
 244             {
 245                 char *s = (char *)data;
 246
 247                 width = strlen(s) + 1;
 248                 height = 1;
 249                 DWORD l = (width * height);
 250                 HANDLE hGlobalMemory = GlobalAlloc(GHND, l);
 251                 if ( hGlobalMemory )
 252                 {
 253                     LPSTR lpGlobalMemory = (LPSTR)GlobalLock(hGlobalMemory);
 254
 255                     memcpy(lpGlobalMemory, s, l);
 256
 257                     GlobalUnlock(hGlobalMemory);
 258                 }
 259
 260                 handle = SetClipboardData(dataFormat, hGlobalMemory);
 261                 break;
 262             }
 263     }
 264
 265     if ( handle == 0 )
 266     {
 267         wxLogSysError(_("Failed to set clipboard data."));
 268
 269         return FALSE;
 270     }
 271
 272     return TRUE;
 273 }
 274
 275 void *wxGetClipboardData(wxDataFormat dataFormat, long *len)
 276 {
 277     void *retval = NULL;
 278
 279     switch ( dataFormat )
 280     {
 281         case wxDF_BITMAP:
 282             {
 283                 BITMAP bm;
 284                 HBITMAP hBitmap = (HBITMAP) GetClipboardData(CF_BITMAP);
 285                 if (!hBitmap)
 286                     break;
 287
 288                 HDC hdcMem = CreateCompatibleDC((HDC) NULL);
 289                 HDC hdcSrc = CreateCompatibleDC((HDC) NULL);
 290
 291                 HBITMAP old = (HBITMAP) ::SelectObject(hdcSrc, hBitmap);
 292                 GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bm);
 293
 294                 HBITMAP hNewBitmap = CreateBitmapIndirect(&bm);
 295
 296                 if (!hNewBitmap)
 297                 {
 298                     SelectObject(hdcSrc, old);
 299                     DeleteDC(hdcMem);
 300                     DeleteDC(hdcSrc);
 301                     break;
 302                 }
 303
 304                 HBITMAP old1 = (HBITMAP) SelectObject(hdcMem, hNewBitmap);
 305                 BitBlt(hdcMem, 0, 0, bm.bmWidth, bm.bmHeight,
 306                        hdcSrc, 0, 0, SRCCOPY);
 307
 308                 // Select new bitmap out of memory DC
 309                 SelectObject(hdcMem, old1);
 310
 311                 // Clean up
 312                 SelectObject(hdcSrc, old);
 313                 DeleteDC(hdcSrc);
 314                 DeleteDC(hdcMem);
 315
 316                 // Create and return a new wxBitmap
 317                 wxBitmap *wxBM = new wxBitmap;
 318                 wxBM->SetHBITMAP((WXHBITMAP) hNewBitmap);
 319                 wxBM->SetWidth(bm.bmWidth);
 320                 wxBM->SetHeight(bm.bmHeight);
 321                 wxBM->SetDepth(bm.bmPlanes);
 322 #if WXWIN_COMPATIBILITY_2
 323                 wxBM->SetOk(TRUE);
 324 #endif // WXWIN_COMPATIBILITY_2
 325                 retval = wxBM;
 326                 break;
 327             }
 328
 329         case wxDF_METAFILE:
 330         case CF_SYLK:
 331         case CF_DIF:
 332         case CF_TIFF:
 333         case CF_PALETTE:
 334         case wxDF_DIB:
 335             {
 336                 wxLogError(_("Unsupported clipboard format."));
 337                 return FALSE;
 338             }
 339
 340         case wxDF_OEMTEXT:
 341             dataFormat = wxDF_TEXT;
 342             // fall through
 343
 344         case wxDF_TEXT:
 345             {
 346                 HANDLE hGlobalMemory = ::GetClipboardData(dataFormat);
 347                 if (!hGlobalMemory)
 348                     break;
 349
 350                 DWORD hsize = ::GlobalSize(hGlobalMemory);
 351                 if (len)
 352                     *len = hsize;
 353
 354                 char *s = new char[hsize];
 355                 if (!s)
 356                     break;
 357
 358                 LPSTR lpGlobalMemory = (LPSTR)::GlobalLock(hGlobalMemory);
 359
 360                 memcpy(s, lpGlobalMemory, hsize);
 361
 362                 ::GlobalUnlock(hGlobalMemory);
 363
 364                 retval = s;
 365                 break;
 366             }
 367
 368         default:
 369             {
 370                 HANDLE hGlobalMemory = ::GetClipboardData(dataFormat);
 371                 if ( !hGlobalMemory )
 372                     break;
 373
 374                 DWORD size = ::GlobalSize(hGlobalMemory);
 375                 if ( len )
 376                     *len = size;
 377
 378                 void *buf = malloc(size);
 379                 if ( !buf )
 380                     break;
 381
 382                 LPSTR lpGlobalMemory = (LPSTR)::GlobalLock(hGlobalMemory);
 383
 384                 memcpy(buf, lpGlobalMemory, size);
 385
 386                 ::GlobalUnlock(hGlobalMemory);
 387
 388                 retval = buf;
 389                 break;
 390             }
 391     }
 392
 393     if ( !retval )
 394     {
 395         wxLogSysError(_("Failed to retrieve data from the clipboard."));
 396     }
 397
 398     return retval;
 399 }
 400
 401 wxDataFormat wxEnumClipboardFormats(wxDataFormat dataFormat)
 402 {
 403   return ::EnumClipboardFormats(dataFormat);
 404 }
 405
 406 int wxRegisterClipboardFormat(wxChar *formatName)
 407 {
 408   return ::RegisterClipboardFormat(formatName);
 409 }
 410
 411 bool wxGetClipboardFormatName(wxDataFormat dataFormat,
 412                               wxChar *formatName,
 413                               int maxCount)
 414 {
 415   return ::GetClipboardFormatName((int)dataFormat, formatName, maxCount) > 0;
 416 }
 417
 418 // ---------------------------------------------------------------------------
 419 // wxClipboard
 420 // ---------------------------------------------------------------------------
 421
 422 IMPLEMENT_DYNAMIC_CLASS(wxClipboard, wxObject)
 423
 424 wxClipboard::wxClipboard()
 425 {
 426     m_clearOnExit = FALSE;
 427 }
 428
 429 wxClipboard::~wxClipboard()
 430 {
 431     if ( m_clearOnExit )
 432     {
 433         Clear();
 434     }
 435 }
 436
 437 void wxClipboard::Clear()
 438 {
 439 #if wxUSE_OLE_CLIPBOARD
 440     if ( FAILED(OleSetClipboard(NULL)) )
 441     {
 442         wxLogLastError("OleSetClipboard(NULL)");
 443     }
 444 #endif
 445 }
 446
 447 bool wxClipboard::Flush()
 448 {
 449 #if wxUSE_OLE_CLIPBOARD
 450     if ( FAILED(OleFlushClipboard()) )
 451     {
 452         wxLogLastError("OleFlushClipboard");
 453
 454         return FALSE;
 455     }
 456     else
 457     {
 458         m_clearOnExit = FALSE;
 459
 460         return TRUE;
 461     }
 462 #else // !wxUSE_OLE_CLIPBOARD
 463     return FALSE;
 464 #endif // wxUSE_OLE_CLIPBOARD/!wxUSE_OLE_CLIPBOARD
 465 }
 466
 467 bool wxClipboard::Open()
 468 {
 469     // OLE opens clipboard for us
 470 #if wxUSE_OLE_CLIPBOARD
 471     return TRUE;
 472 #else
 473     return wxOpenClipboard();
 474 #endif
 475 }
 476
 477 bool wxClipboard::IsOpened() const
 478 {
 479 #if wxUSE_OLE_CLIPBOARD
 480     return TRUE;
 481 #else
 482     return wxIsClipboardOpened();
 483 #endif
 484 }
 485
 486 bool wxClipboard::SetData( wxDataObject *data )
 487 {
 488 #if !wxUSE_OLE_CLIPBOARD
 489     (void)wxEmptyClipboard();
 490 #endif // wxUSE_OLE_CLIPBOARD
 491
 492     if ( data )
 493         return AddData(data);
 494     else
 495         return TRUE;
 496 }
 497
 498 bool wxClipboard::AddData( wxDataObject *data )
 499 {
 500     wxCHECK_MSG( data, FALSE, wxT("data is invalid") );
 501
 502 #if wxUSE_OLE_CLIPBOARD
 503     HRESULT hr = OleSetClipboard(data->GetInterface());
 504     if ( FAILED(hr) )
 505     {
 506         wxLogSysError(hr, _("Failed to put data on the clipboard"));
 507
 508         // don't free anything in this case
 509
 510         return FALSE;
 511     }
 512
 513     // we have a problem here because we should delete wxDataObject, but we
 514     // can't do it because IDataObject which we just gave to the clipboard
 515     // would try to use it when it will need the data. IDataObject is ref
 516     // counted and so doesn't suffer from such problem, so we release it now
 517     // and tell it to delete wxDataObject when it is deleted itself.
 518     data->SetAutoDelete();
 519
 520     // we have to call either OleSetClipboard(NULL) or OleFlushClipboard() when
 521     // using OLE clipboard when the app terminates - by default, we call
 522     // OleSetClipboard(NULL) which won't waste RAM, but the app can call
 523     // wxClipboard::Flush() to chaneg this
 524     m_clearOnExit = TRUE;
 525
 526     return TRUE;
 527 #elif wxUSE_DATAOBJ
 528     wxCHECK_MSG( wxIsClipboardOpened(), FALSE, wxT("clipboard not open") );
 529
 530     wxDataFormat format = data->GetFormat();
 531
 532     switch ( format )
 533     {
 534         case wxDF_TEXT:
 535         case wxDF_OEMTEXT:
 536         {
 537             wxTextDataObject* textDataObject = (wxTextDataObject*) data;
 538             wxString str(textDataObject->GetText());
 539             return wxSetClipboardData(format, str.c_str());
 540         }
 541
 542         case wxDF_BITMAP:
 543         case wxDF_DIB:
 544         {
 545             wxBitmapDataObject* bitmapDataObject = (wxBitmapDataObject*) data;
 546             wxBitmap bitmap(bitmapDataObject->GetBitmap());
 547             return wxSetClipboardData(data->GetFormat(), &bitmap);
 548         }
 549
 550 #if wxUSE_METAFILE
 551         case wxDF_METAFILE:
 552         {
 553             wxMetafileDataObject* metaFileDataObject =
 554                 (wxMetafileDataObject*) data;
 555             wxMetafile metaFile = metaFileDataObject->GetMetafile();
 556             return wxSetClipboardData(wxDF_METAFILE, &metaFile,
 557                                       metaFileDataObject->GetWidth(),
 558                                       metaFileDataObject->GetHeight());
 559         }
 560 #endif // wxUSE_METAFILE
 561
 562         default:
 563             return wxSetClipboardData(data);
 564     }
 565 #else // !wxUSE_DATAOBJ
 566     return FALSE;
 567 #endif // wxUSE_DATAOBJ/!wxUSE_DATAOBJ
 568 }
 569
 570 void wxClipboard::Close()
 571 {
 572     // OLE closes clipboard for us
 573 #if !wxUSE_OLE_CLIPBOARD
 574     wxCloseClipboard();
 575 #endif
 576 }
 577
 578 bool wxClipboard::IsSupported( wxDataFormat format )
 579 {
 580     return wxIsClipboardFormatAvailable(format);
 581 }
 582
 583 bool wxClipboard::GetData( wxDataObject& data )
 584 {
 585 #if wxUSE_OLE_CLIPBOARD
 586     IDataObject *pDataObject = NULL;
 587     HRESULT hr = OleGetClipboard(&pDataObject);
 588     if ( FAILED(hr) || !pDataObject )
 589     {
 590         wxLogSysError(hr, _("Failed to get data from the clipboard"));
 591
 592         return FALSE;
 593     }
 594
 595     // build the list of supported formats
 596     size_t nFormats = data.GetFormatCount(wxDataObject::Set);
 597     wxDataFormat format, *formats;
 598     if ( nFormats == 1 )
 599     {
 600         // the most common case
 601         formats = &format;
 602     }
 603     else
 604     {
 605         // bad luck, need to alloc mem
 606         formats = new wxDataFormat[nFormats];
 607     }
 608
 609     data.GetAllFormats(formats, wxDataObject::Set);
 610
 611     // get the format enumerator
 612     bool result = FALSE;
 613     wxArrayInt supportedFormats;
 614     IEnumFORMATETC *pEnumFormatEtc = NULL;
 615     hr = pDataObject->EnumFormatEtc(DATADIR_GET, &pEnumFormatEtc);
 616     if ( FAILED(hr) || !pEnumFormatEtc )
 617     {
 618         wxLogSysError(hr,
 619                       _("Failed to retrieve the supported clipboard formats"));
 620     }
 621     else
 622     {
 623         // ask for the supported formats and see if there are any we support
 624         FORMATETC formatEtc;
 625         for ( ;; )
 626         {
 627             ULONG nCount;
 628             hr = pEnumFormatEtc->Next(1, &formatEtc, &nCount);
 629
 630             // don't use FAILED() because S_FALSE would pass it
 631             if ( hr != S_OK )
 632             {
 633                 // no more formats
 634                 break;
 635             }
 636
 637             CLIPFORMAT cf = formatEtc.cfFormat;
 638
 639 #ifdef __WXDEBUG__
 640             wxLogTrace(wxTRACE_OleCalls,
 641                        wxT("Object on the clipboard supports format %s."),
 642                        wxDataObject::GetFormatName(cf));
 643 #endif // Debug
 644
 645             // is supported?
 646             for ( size_t n = 0; n < nFormats; n++ )
 647             {
 648                 if ( formats[n].GetFormatId() == cf )
 649                 {
 650                     if ( supportedFormats.Index(cf) == wxNOT_FOUND )
 651                     {
 652                         supportedFormats.Add(cf);
 653                     }
 654                 }
 655             }
 656         }
 657
 658         pEnumFormatEtc->Release();
 659     }
 660
 661     if ( formats != &format )
 662     {
 663         delete [] formats;
 664     }
 665     //else: we didn't allocate any memory
 666
 667     if ( !supportedFormats.IsEmpty() )
 668     {
 669         FORMATETC formatEtc;
 670         formatEtc.ptd      = NULL;
 671         formatEtc.dwAspect = DVASPECT_CONTENT;
 672         formatEtc.lindex   = -1;
 673         formatEtc.tymed    = TYMED_HGLOBAL;
 674
 675         size_t nSupportedFormats = supportedFormats.GetCount();
 676         for ( size_t n = 0; !result && (n < nSupportedFormats); n++ )
 677         {
 678             STGMEDIUM medium;
 679             formatEtc.cfFormat = supportedFormats[n];
 680
 681             // try to get data
 682             hr = pDataObject->GetData(&formatEtc, &medium);
 683             if ( FAILED(hr) )
 684             {
 685                 // try other tymed for GDI objects
 686                 if ( formatEtc.cfFormat == CF_BITMAP )
 687                 {
 688                     formatEtc.tymed = TYMED_HGLOBAL;
 689                     hr = pDataObject->GetData(&formatEtc, &medium);
 690                 }
 691             }
 692
 693             if ( SUCCEEDED(hr) )
 694             {
 695                 // pass the data to the data object
 696                 hr = data.GetInterface()->SetData(&formatEtc, &medium, TRUE);
 697                 if ( FAILED(hr) )
 698                 {
 699                     wxLogDebug(wxT("Failed to set data in wxIDataObject"));
 700
 701                     // IDataObject only takes the ownership of data if it
 702                     // successfully got it - which is not the case here
 703                     ReleaseStgMedium(&medium);
 704                 }
 705                 else
 706                 {
 707                     result = TRUE;
 708                 }
 709             }
 710             //else: unsupported tymed?
 711         }
 712     }
 713     //else: unsupported format
 714
 715     // clean up and return
 716     pDataObject->Release();
 717
 718     return result;
 719 #elif wxUSE_DATAOBJ
 720     wxCHECK_MSG( wxIsClipboardOpened(), FALSE, wxT("clipboard not open") );
 721
 722     wxDataFormat format = data.GetFormat();
 723     switch ( format )
 724     {
 725         case wxDF_TEXT:
 726         case wxDF_OEMTEXT:
 727         {
 728             wxTextDataObject& textDataObject = (wxTextDataObject &)data;
 729             char* s = (char*)wxGetClipboardData(format);
 730             if ( !s )
 731                 return FALSE;
 732
 733             textDataObject.SetText(s);
 734             delete [] s;
 735
 736             return TRUE;
 737         }
 738
 739         case wxDF_BITMAP:
 740         case wxDF_DIB:
 741         {
 742             wxBitmapDataObject& bitmapDataObject = (wxBitmapDataObject &)data;
 743             wxBitmap* bitmap = (wxBitmap *)wxGetClipboardData(data->GetFormat());
 744             if ( !bitmap )
 745                 return FALSE;
 746
 747             bitmapDataObject.SetBitmap(*bitmap);
 748             delete bitmap;
 749
 750             return TRUE;
 751         }
 752 #if wxUSE_METAFILE
 753         case wxDF_METAFILE:
 754         {
 755             wxMetafileDataObject& metaFileDataObject = (wxMetafileDataObject &)data;
 756             wxMetafile* metaFile = (wxMetafile *)wxGetClipboardData(wxDF_METAFILE);
 757             if ( !metaFile )
 758                 return FALSE;
 759
 760             metaFileDataObject.SetMetafile(*metaFile);
 761             delete metaFile;
 762
 763             return TRUE;
 764         }
 765 #endif // wxUSE_METAFILE
 766     }
 767 #else // !wxUSE_DATAOBJ
 768     wxFAIL_MSG( wxT("no clipboard implementation") );
 769 #endif // wxUSE_OLE_CLIPBOARD/wxUSE_DATAOBJ
 770
 771     return FALSE;
 772 }
 773
 774 #else
 775     #error "Please turn wxUSE_CLIPBOARD on to compile this file."
 776 #endif // wxUSE_CLIPBOARD
 777