src/os2/dataobj.cpp

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