src/os2/dataobj.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        os2/dataobj.cpp
   3 // Purpose:     implementation of wx[I]DataObject class
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/21/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 David Webster
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21   #pragma implementation "dataobj.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifndef WX_PRECOMP
  28 #include "wx/intl.h"
  29 #endif
  30 #include "wx/defs.h"
  31
  32 #include "wx/log.h"
  33 #include "wx/dataobj.h"
  34 #include "wx/mstream.h"
  35 #include "wx/image.h"
  36
  37 #define INCL_DOS
  38 #include <os2.h>
  39
  40 // ----------------------------------------------------------------------------
  41 // functions
  42 // ----------------------------------------------------------------------------
  43
  44 // ----------------------------------------------------------------------------
  45 // wxDataFormat
  46 // ----------------------------------------------------------------------------
  47
  48 wxString wxDataFormat::GetId() const
  49 {
  50     wxChar                          zBuf[256];
  51     wxString                        sRet;
  52
  53     ::WinQueryAtomName( ::WinQuerySystemAtomTable()
  54                        ,m_uFormat
  55                        ,(PSZ)zBuf
  56                        ,256
  57                       );
  58     sRet = zBuf;
  59     return sRet;
  60 } // end of wxDataFormat::GetId()
  61
  62 void wxDataFormat::SetId (
  63   const wxChar*                     zId
  64 )
  65 {
  66     m_uFormat = ::WinAddAtom( ::WinQuerySystemAtomTable()
  67                              ,(PSZ)zId
  68                             );
  69 } // end of wxDataFormat::SetId
  70
  71 class CIDataObject
  72 {
  73 public:
  74     CIDataObject(wxDataObject* pDataObject);
  75     ~CIDataObject();
  76
  77     //
  78     // Operations on the DRAGITEM struct
  79     //
  80     bool GetData( const wxDataFormat& rFormat
  81                  ,char*               pzBuffer
  82                  ,ULONG               ulLen
  83                 );
  84     void GetDataHere( const wxDataFormat& rFormat
  85                      ,char*               pzBuffer
  86                      ,ULONG               ulLen
  87                     );
  88     void QueryGetData(const wxDataFormat& rFormat);
  89     void SetData( const wxDataFormat& rFormat
  90                  ,char*               pzBuffer
  91                 );
  92 private:
  93     wxDataObject*                   m_pDataObject;      // pointer to C++ class we belong to
  94     DRAGITEM                        m_vDragItem;
  95 }; // end of CLASS CIDataObject
  96
  97 bool CIDataObject::GetData (
  98   const wxDataFormat&               rFormat
  99 , char*                             pzBuffer
 100 , ULONG                             ulLen
 101 )
 102 {
 103     QueryGetData(rFormat);
 104     if (rFormat.GetType() == wxDF_INVALID)
 105         return FALSE;
 106
 107     ULONG                           ulSize = m_pDataObject->GetDataSize(rFormat);
 108
 109     if (ulSize == 0)
 110     {
 111         //
 112         // It probably means that the method is just not implemented
 113         //
 114         return FALSE;
 115     }
 116     if (rFormat.GetType() == wxDF_PRIVATE)
 117     {
 118         //
 119         // For custom formats, put the size with the data - alloc the
 120         // space for it
 121         //
 122         ulSize += sizeof(ULONG);
 123     }
 124
 125     if (ulSize > ulLen) // not enough room to copy
 126         return FALSE;
 127
 128     //
 129     // Copy the data
 130     //
 131     GetDataHere( rFormat
 132                 ,pzBuffer
 133                 ,ulSize
 134                );
 135     return TRUE;
 136 } // end of CIDataObject::GetData
 137
 138 void CIDataObject::GetDataHere(
 139   const wxDataFormat&               rFormat
 140 , char*                             pzBuffer
 141 , ULONG                             WXUNUSED(ulLen)
 142 )
 143 {
 144     m_pDataObject->GetDataHere( rFormat
 145                                ,(void*)pzBuffer
 146                               );
 147 } // end of CIDataObject::GetDataHere
 148
 149 void CIDataObject::QueryGetData (
 150   const wxDataFormat&               rFormat
 151 )
 152 {
 153     m_pDataObject->IsSupportedFormat(rFormat);
 154 } // end of CIDataObject::QueryGetData
 155
 156 void CIDataObject::SetData (
 157   const wxDataFormat&               rFormat
 158 , char*                             pzBuffer
 159 )
 160 {
 161     ULONG                           ulSize = 0;
 162
 163     switch (rFormat.GetType())
 164     {
 165         case wxDF_TEXT:
 166         case wxDF_OEMTEXT:
 167         case wxDF_FILENAME:
 168         case wxDF_HTML:
 169             ulSize = strlen((const char *)pzBuffer);
 170             break;
 171
 172 #if wxUSE_UNICODE
 173         case wxDF_UNICODETEXT:
 174              ulSize = ::wcslen((const wchar_t *)pzBuffer);
 175              break;
 176 #endif
 177
 178         case wxDF_BITMAP:
 179         case wxDF_METAFILE:
 180         case wxDF_ENHMETAFILE:
 181         case wxDF_TIFF:
 182         case wxDF_DIB:
 183             ulSize = 0; // pass via a handle
 184             break;
 185
 186
 187         case wxDF_SYLK:
 188         case wxDF_DIF:
 189         case wxDF_PALETTE:
 190         case wxDF_PENDATA:
 191         case wxDF_RIFF:
 192         case wxDF_WAVE:
 193         case wxDF_LOCALE:
 194             //PUNT
 195             break;
 196
 197         case wxDF_PRIVATE:
 198             size_t*                 p = (size_t *)pzBuffer;
 199
 200             ulSize = *p++;
 201             pzBuffer = (char*)p;
 202             break;
 203     }
 204     m_pDataObject->SetData( rFormat
 205                            ,ulSize
 206                            ,(void*)pzBuffer
 207                           );
 208 } // end of CIDataObject::SetData
 209
 210 //-------------------------------------------------------------------------
 211 // wxDataObject
 212 //-------------------------------------------------------------------------
 213
 214 wxDataObject::wxDataObject ()
 215 {
 216     m_pDataObject = new DRAGITEM;
 217 } // end of wxDataObject::wxDataObject
 218
 219 wxDataObject::~wxDataObject ()
 220 {
 221     delete m_pDataObject;
 222 } // end of wxDataObject::~wxDataObject
 223
 224 // ----------------------------------------------------------------------------
 225 // wxFileDataObject
 226 // ----------------------------------------------------------------------------
 227
 228 bool wxFileDataObject::GetDataHere(
 229   void*                             pBuf
 230 ) const
 231 {
 232     wxString                        sFilenames;
 233
 234     for (size_t i = 0; i < m_filenames.GetCount(); i++)
 235     {
 236         sFilenames += m_filenames[i];
 237         sFilenames += (wxChar)0;
 238     }
 239
 240     memcpy(pBuf, sFilenames.mbc_str(), sFilenames.Len() + 1);
 241     return TRUE;
 242 }
 243
 244 size_t wxFileDataObject::GetDataSize() const
 245 {
 246     size_t                          nRes = 0;
 247
 248     for (size_t i = 0; i < m_filenames.GetCount(); i++)
 249     {
 250         nRes += m_filenames[i].Len();
 251         nRes += 1;
 252     }
 253
 254     return nRes + 1;
 255 }
 256
 257 bool wxFileDataObject::SetData(
 258   size_t                            WXUNUSED(nSize)
 259 , const void*                       pBuf
 260 )
 261 {
 262     /* TODO */
 263
 264     wxString                        sFile((const wxChar *)pBuf);  /* char, not wxChar */
 265
 266     AddFile(sFile);
 267
 268     return TRUE;
 269 }
 270
 271 void wxFileDataObject::AddFile(
 272   const wxString&                   rFilename
 273 )
 274 {
 275     m_filenames.Add(rFilename);
 276 }
 277
 278 // ----------------------------------------------------------------------------
 279 // wxBitmapDataObject
 280 // ----------------------------------------------------------------------------
 281
 282 wxBitmapDataObject::wxBitmapDataObject()
 283 {
 284     Init();
 285 }
 286
 287 wxBitmapDataObject::wxBitmapDataObject(
 288   const wxBitmap&                   rBitmap
 289 )
 290 : wxBitmapDataObjectBase(rBitmap)
 291 {
 292     Init();
 293
 294     DoConvertToPng();
 295 }
 296
 297 wxBitmapDataObject::~wxBitmapDataObject()
 298 {
 299     Clear();
 300 }
 301
 302 void wxBitmapDataObject::SetBitmap(
 303   const wxBitmap&                   rBitmap
 304 )
 305 {
 306     ClearAll();
 307     wxBitmapDataObjectBase::SetBitmap(rBitmap);
 308     DoConvertToPng();
 309 }
 310
 311 bool wxBitmapDataObject::GetDataHere(
 312   void*                             pBuf
 313 ) const
 314 {
 315     if (!m_pngSize)
 316     {
 317         wxFAIL_MSG(wxT("attempt to copy empty bitmap failed"));
 318         return FALSE;
 319     }
 320     memcpy(pBuf, m_pngData, m_pngSize);
 321     return TRUE;
 322 }
 323
 324 bool wxBitmapDataObject::SetData(
 325   size_t                            nSize
 326 , const void*                       pBuf
 327 )
 328 {
 329     Clear();
 330     m_pngSize = nSize;
 331     m_pngData = malloc(m_pngSize);
 332
 333     memcpy(m_pngData, pBuf, m_pngSize);
 334
 335 #if wxUSE_STREAMS
 336     wxMemoryInputStream             vMstream((char*)m_pngData, m_pngSize);
 337     wxImage                         vImage;
 338     wxPNGHandler                    vHandler;
 339
 340     if (!vHandler.LoadFile(&vImage, vMstream))
 341     {
 342         return FALSE;
 343     }
 344
 345     m_bitmap = wxBitmap(vImage);
 346 #endif //wxUSE_STREAMS
 347
 348     return m_bitmap.Ok();
 349 }
 350
 351 void wxBitmapDataObject::DoConvertToPng()
 352 {
 353     if (!m_bitmap.Ok())
 354         return;
 355
 356 #if wxUSE_STREAMS
 357     wxImage                         vImage = m_bitmap.ConvertToImage();
 358     wxPNGHandler                    vHandler;
 359     wxCountingOutputStream          vCount;
 360
 361     vHandler.SaveFile(&vImage, vCount);
 362
 363     m_pngSize = vCount.GetSize() + 100; // sometimes the size seems to vary ???
 364     m_pngData = malloc(m_pngSize);
 365
 366     wxMemoryOutputStream            vMstream((char*) m_pngData, m_pngSize);
 367
 368     vHandler.SaveFile(&vImage, vMstream );
 369 #endif
 370 }
 371