src/mac/carbon/dataobj.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        mac/dataobj.cpp
   3 // Purpose:     implementation of wxDataObject class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     10/21/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21   #pragma implementation "dataobj.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #if wxUSE_DATAOBJ
  28
  29 #ifndef WX_PRECOMP
  30 #include "wx/intl.h"
  31 #endif
  32
  33 #include "wx/log.h"
  34 #include "wx/dataobj.h"
  35 #include "wx/dcmemory.h"
  36 #include "wx/mstream.h"
  37 #include "wx/image.h"
  38 #include "wx/metafile.h"
  39 #include "wx/mac/private.h"
  40 #include <Scrap.h>
  41
  42 // ----------------------------------------------------------------------------
  43 // functions
  44 // ----------------------------------------------------------------------------
  45
  46 // ----------------------------------------------------------------------------
  47 // wxDataFormat
  48 // ----------------------------------------------------------------------------
  49
  50 wxDataFormat::wxDataFormat()
  51 {
  52     m_type = wxDF_INVALID;
  53     m_format = 0;
  54 }
  55
  56 wxDataFormat::wxDataFormat(  wxDataFormatId   vType )
  57 {
  58     SetType(vType);
  59 }
  60
  61 wxDataFormat::wxDataFormat(  const wxChar*  zId)
  62 {
  63     SetId(zId);
  64 }
  65
  66 wxDataFormat::wxDataFormat(  const wxString&   rId)
  67 {
  68     SetId(rId);
  69 }
  70
  71 wxDataFormat::wxDataFormat( NativeFormat vFormat)
  72 {
  73     SetId(vFormat);
  74 }
  75
  76 void wxDataFormat::SetType(  wxDataFormatId  Type )
  77 {
  78     m_type = Type;
  79
  80     if (m_type == wxDF_TEXT )
  81         m_format = kScrapFlavorTypeText;
  82     else if (m_type == wxDF_UNICODETEXT )
  83         m_format = kScrapFlavorTypeUnicode ;
  84     else if (m_type == wxDF_BITMAP || m_type == wxDF_METAFILE )
  85         m_format = kScrapFlavorTypePicture;
  86     else if (m_type == wxDF_FILENAME)
  87         m_format = kDragFlavorTypeHFS ;
  88     else
  89     {
  90        wxFAIL_MSG( wxT("invalid dataformat") );
  91
  92        // this is '????' but it can't be used in the code because ??' is
  93        // parsed as a trigraph!
  94        m_format = 0x3f3f3f3f;
  95     }
  96 }
  97
  98 wxString wxDataFormat::GetId() const
  99 {
 100     // note that m_format is not a pointer to string, it *is* itself a 4
 101     // character string
 102     char text[5] ;
 103     strncpy( text , (char*) &m_format , 4 ) ;
 104     text[4] = 0 ;
 105
 106     return wxString::FromAscii( text ) ;
 107 }
 108
 109 void wxDataFormat::SetId(  NativeFormat  format )
 110 {
 111     m_format = format;
 112
 113     if (m_format == kScrapFlavorTypeText)
 114         m_type = wxDF_TEXT;
 115     else if (m_format == kScrapFlavorTypeUnicode )
 116         m_type = wxDF_UNICODETEXT;
 117     else if (m_format == kScrapFlavorTypePicture)
 118         m_type = wxDF_BITMAP;
 119     else if (m_format == kDragFlavorTypeHFS )
 120         m_type = wxDF_FILENAME;
 121     else
 122         m_type = wxDF_PRIVATE;
 123 }
 124
 125 void wxDataFormat::SetId( const wxChar* zId )
 126 {
 127     m_type = wxDF_PRIVATE;
 128     m_format = 0;// TODO: get the format gdk_atom_intern( wxMBSTRINGCAST tmp.mbc_str(), FALSE );
 129 }
 130
 131 //-------------------------------------------------------------------------
 132 // wxDataObject
 133 //-------------------------------------------------------------------------
 134
 135 wxDataObject::wxDataObject()
 136 {
 137 }
 138
 139 bool wxDataObject::IsSupportedFormat(
 140   const wxDataFormat&               rFormat
 141 , Direction                         vDir
 142 ) const
 143 {
 144     size_t                          nFormatCount = GetFormatCount(vDir);
 145
 146     if (nFormatCount == 1)
 147     {
 148         return rFormat == GetPreferredFormat();
 149     }
 150     else
 151     {
 152         wxDataFormat* pFormats = new wxDataFormat[nFormatCount];
 153         GetAllFormats( pFormats
 154                       ,vDir
 155                      );
 156
 157         size_t                      n;
 158
 159         for (n = 0; n < nFormatCount; n++)
 160         {
 161             if (pFormats[n] == rFormat)
 162                 break;
 163         }
 164
 165         delete [] pFormats;
 166
 167         // found?
 168         return n < nFormatCount;
 169     }
 170 }
 171
 172 // ----------------------------------------------------------------------------
 173 // wxTextDataObject
 174 // ----------------------------------------------------------------------------
 175
 176 #if wxUSE_UNICODE
 177 void wxTextDataObject::GetAllFormats(wxDataFormat *formats, wxDataObjectBase::Direction dir) const
 178 {
 179     *formats++ = wxDataFormat( wxDF_TEXT );
 180     *formats = wxDataFormat( wxDF_UNICODETEXT );
 181 }
 182
 183 #endif
 184
 185 // ----------------------------------------------------------------------------
 186 // wxFileDataObject
 187 // ----------------------------------------------------------------------------
 188
 189 bool wxFileDataObject::GetDataHere(
 190   void*                             pBuf
 191 ) const
 192 {
 193     wxString                        sFilenames;
 194
 195     for (size_t i = 0; i < m_filenames.GetCount(); i++)
 196     {
 197         sFilenames += m_filenames[i];
 198         sFilenames += (wxChar)0;
 199     }
 200
 201     memcpy(pBuf, sFilenames.mbc_str(), sFilenames.Len() + 1);
 202     return TRUE;
 203 }
 204
 205 size_t wxFileDataObject::GetDataSize() const
 206 {
 207     size_t nRes = 0;
 208
 209     for (size_t i = 0; i < m_filenames.GetCount(); i++)
 210     {
 211         nRes += m_filenames[i].Len();
 212         nRes += 1;
 213     }
 214
 215     return nRes + 1;
 216 }
 217
 218 bool wxFileDataObject::SetData(
 219   size_t                            WXUNUSED(nSize)
 220 , const void*                       pBuf
 221 )
 222 {
 223     m_filenames.Empty();
 224
 225     // only add if this is not an empty string
 226     // we can therefore clear the list by just setting an empty string
 227     if ( (*(char*)pBuf) != 0 )
 228         AddFile(wxString::FromAscii((char*)pBuf));
 229
 230     return TRUE;
 231 }
 232
 233 void wxFileDataObject::AddFile(
 234   const wxString&                   rFilename
 235 )
 236 {
 237     m_filenames.Add(rFilename);
 238 }
 239
 240 // ----------------------------------------------------------------------------
 241 // wxBitmapDataObject
 242 // ----------------------------------------------------------------------------
 243
 244 wxBitmapDataObject::wxBitmapDataObject()
 245 {
 246     Init();
 247 }
 248
 249 wxBitmapDataObject::wxBitmapDataObject(
 250   const wxBitmap& rBitmap
 251 )
 252 : wxBitmapDataObjectBase(rBitmap)
 253 {
 254     Init();
 255     if ( m_bitmap.Ok() )
 256     {
 257         m_pictHandle = wxMacCreatePicHandle( rBitmap ) ;
 258         m_pictCreated = true ;
 259     }
 260 }
 261
 262 wxBitmapDataObject::~wxBitmapDataObject()
 263 {
 264     Clear();
 265 }
 266
 267 void wxBitmapDataObject::SetBitmap(
 268   const wxBitmap&                   rBitmap
 269 )
 270 {
 271     Clear();
 272     wxBitmapDataObjectBase::SetBitmap(rBitmap);
 273     if ( m_bitmap.Ok() )
 274     {
 275         m_pictHandle = wxMacCreatePicHandle( rBitmap ) ;
 276         m_pictCreated = true ;
 277     }
 278 }
 279
 280 void wxBitmapDataObject::Init()
 281 {
 282     m_pictHandle = NULL ;
 283     m_pictCreated = false ;
 284 }
 285
 286 void wxBitmapDataObject::Clear()
 287 {
 288     if ( m_pictCreated && m_pictHandle )
 289     {
 290         KillPicture( (PicHandle) m_pictHandle ) ;
 291     }
 292     m_pictHandle = NULL ;
 293 }
 294
 295 bool wxBitmapDataObject::GetDataHere(
 296   void*                             pBuf
 297 ) const
 298 {
 299     if (!m_pictHandle)
 300     {
 301         wxFAIL_MSG(wxT("attempt to copy empty bitmap failed"));
 302         return FALSE;
 303     }
 304     memcpy(pBuf, *(Handle)m_pictHandle, GetHandleSize((Handle)m_pictHandle));
 305     return TRUE;
 306 }
 307
 308 size_t wxBitmapDataObject::GetDataSize() const
 309 {
 310     return GetHandleSize((Handle)m_pictHandle) ;
 311 }
 312
 313 bool wxBitmapDataObject::SetData(
 314   size_t                            nSize
 315 , const void*                       pBuf
 316 )
 317 {
 318     Clear();
 319     PicHandle picHandle = (PicHandle) NewHandle( nSize ) ;
 320     memcpy( *picHandle , pBuf , nSize ) ;
 321     m_pictHandle = picHandle ;
 322     // ownership is transferred to the bitmap
 323     m_pictCreated = false ;
 324     Rect frame = (**picHandle).picFrame ;
 325
 326     wxMetafile mf ;
 327     mf.SetHMETAFILE( (WXHMETAFILE) m_pictHandle ) ;
 328     wxMemoryDC mdc ;
 329     m_bitmap.Create( frame.right - frame.left ,frame.bottom - frame.top ) ;
 330     mdc.SelectObject(m_bitmap ) ;
 331     mf.Play( &mdc ) ;
 332     mdc.SelectObject( wxNullBitmap ) ;
 333
 334     return m_bitmap.Ok();
 335 }
 336
 337 #endif