src/mac/carbon/region.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // File:      src/mac/carbon/region.cpp
   3 // Purpose:   Region class
   4 // Author:    Stefan Csomor
   5 // Created:   Fri Oct 24 10:46:34 MET 1997
   6 // RCS-ID:    $Id$
   7 // Copyright: (c) 1997 Stefan Csomor
   8 // Licence:   wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/region.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/gdicmn.h"
  17 #endif
  18
  19 #include "wx/mac/uma.h"
  20
  21 IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
  22 IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
  23
  24 //-----------------------------------------------------------------------------
  25 // wxRegionRefData implementation
  26 //-----------------------------------------------------------------------------
  27
  28 class WXDLLEXPORT wxRegionRefData : public wxGDIRefData
  29 {
  30 public:
  31     wxRegionRefData()
  32     { m_macRgn = NewRgn(); }
  33
  34     wxRegionRefData(const wxRegionRefData& data)
  35         : wxGDIRefData()
  36     {
  37         m_macRgn = NewRgn();
  38         CopyRgn( data.m_macRgn , m_macRgn );
  39     }
  40
  41     virtual ~wxRegionRefData()
  42     { DisposeRgn( m_macRgn ); }
  43
  44     RgnHandle    m_macRgn;
  45 };
  46
  47 #define M_REGION (((wxRegionRefData*)m_refData)->m_macRgn)
  48 #define OTHER_M_REGION(a) (((wxRegionRefData*)(a.m_refData))->m_macRgn)
  49
  50 //-----------------------------------------------------------------------------
  51 // wxRegion
  52 //-----------------------------------------------------------------------------
  53
  54 /*!
  55  * Create an empty region.
  56  */
  57 wxRegion::wxRegion()
  58 {
  59     m_refData = new wxRegionRefData;
  60 }
  61
  62 wxRegion::wxRegion(WXHRGN hRegion )
  63 {
  64     m_refData = new wxRegionRefData;
  65     CopyRgn( (RgnHandle) hRegion , (RgnHandle) M_REGION ) ;
  66 }
  67
  68 wxRegion::wxRegion(long x, long y, long w, long h)
  69 {
  70     m_refData = new wxRegionRefData;
  71     SetRectRgn( (RgnHandle) M_REGION , x , y , x + w , y + h ) ;
  72 }
  73
  74 wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight)
  75 {
  76     m_refData = new wxRegionRefData;
  77     SetRectRgn( (RgnHandle) M_REGION , topLeft.x , topLeft.y , bottomRight.x , bottomRight.y ) ;
  78 }
  79
  80 wxRegion::wxRegion(const wxRect& rect)
  81 {
  82     m_refData = new wxRegionRefData;
  83     SetRectRgn( (RgnHandle) M_REGION , rect.x , rect.y , rect.x + rect.width , rect.y + rect.height ) ;
  84 }
  85
  86 wxRegion::wxRegion(size_t n, const wxPoint *points, int WXUNUSED(fillStyle))
  87 {
  88     m_refData = new wxRegionRefData;
  89
  90 #ifndef __LP64__
  91     // TODO : any APIs ?
  92     // OS X somehow does not collect the region invisibly as before, so sometimes things
  93     // get drawn on screen instead of just being combined into a region, therefore we allocate a temp gworld now
  94
  95     GWorldPtr gWorld = NULL;
  96     GWorldPtr oldWorld;
  97     GDHandle oldGDHandle;
  98     OSStatus err;
  99     Rect destRect = { 0, 0, 1, 1 };
 100
 101     ::GetGWorld( &oldWorld, &oldGDHandle );
 102     err = ::NewGWorld( &gWorld, 32, &destRect, NULL, NULL, 0 );
 103     if ( err == noErr )
 104     {
 105         ::SetGWorld( gWorld, GetGDevice() );
 106
 107         OpenRgn();
 108
 109         wxCoord x1, x2 , y1 , y2 ;
 110         x2 = x1 = points[0].x ;
 111         y2 = y1 = points[0].y ;
 112
 113         ::MoveTo( x1, y1 );
 114         for (size_t i = 1; i < n; i++)
 115         {
 116             x2 = points[i].x ;
 117             y2 = points[i].y ;
 118             ::LineTo( x2, y2 );
 119         }
 120
 121         // close the polyline if necessary
 122         if ( x1 != x2 || y1 != y2 )
 123             ::LineTo( x1, y1 ) ;
 124
 125         CloseRgn( M_REGION ) ;
 126
 127         ::SetGWorld( oldWorld, oldGDHandle );
 128     }
 129 #endif
 130 }
 131
 132 wxRegion::~wxRegion()
 133 {
 134     // m_refData unrefed in ~wxObject
 135 }
 136
 137 //-----------------------------------------------------------------------------
 138 //# Modify region
 139 //-----------------------------------------------------------------------------
 140
 141 //! Clear current region
 142 void wxRegion::Clear()
 143 {
 144     UnRef();
 145 }
 146
 147 // Move the region
 148 bool wxRegion::DoOffset(wxCoord x, wxCoord y)
 149 {
 150     wxCHECK_MSG( M_REGION, false, _T("invalid wxRegion") );
 151
 152     if ( !x && !y )
 153         // nothing to do
 154         return true;
 155
 156     OffsetRgn( M_REGION , x , y ) ;
 157
 158     return true ;
 159 }
 160
 161
 162 //! Union /e region with this.
 163 bool wxRegion::DoCombine(const wxRegion& region, wxRegionOp op)
 164 {
 165     wxCHECK_MSG( region.Ok(), false, _T("invalid wxRegion") );
 166
 167     // Don't change shared data
 168     if (!m_refData)
 169     {
 170         m_refData = new wxRegionRefData();
 171     }
 172     else if (m_refData->GetRefCount() > 1)
 173     {
 174         wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 175         UnRef();
 176         m_refData = new wxRegionRefData(*ref);
 177     }
 178
 179     switch (op)
 180     {
 181         case wxRGN_AND:
 182             SectRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 183             break ;
 184
 185         case wxRGN_OR:
 186             UnionRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 187             break ;
 188
 189         case wxRGN_XOR:
 190              XorRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 191             break ;
 192
 193         case wxRGN_DIFF:
 194             DiffRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 195             break ;
 196
 197         case wxRGN_COPY:
 198         default:
 199             CopyRgn( OTHER_M_REGION(region) , M_REGION ) ;
 200             break ;
 201     }
 202
 203     return true;
 204 }
 205
 206 //-----------------------------------------------------------------------------
 207 //# Information on region
 208 //-----------------------------------------------------------------------------
 209
 210 bool wxRegion::DoIsEqual(const wxRegion& region) const
 211 {
 212     wxFAIL_MSG( _T("not implemented") );
 213
 214     return false;
 215 }
 216
 217 // Outer bounds of region
 218 bool wxRegion::DoGetBox(wxCoord& x, wxCoord& y, wxCoord& w, wxCoord& h) const
 219 {
 220     if (m_refData)
 221     {
 222         Rect box ;
 223         GetRegionBounds( M_REGION , &box ) ;
 224         x = box.left ;
 225         y = box.top ;
 226         w = box.right - box.left ;
 227         h = box.bottom - box.top ;
 228
 229         return true;
 230     }
 231     else
 232     {
 233         x = y = w = h = 0;
 234
 235         return false;
 236     }
 237 }
 238
 239 // Is region empty?
 240 bool wxRegion::IsEmpty() const
 241 {
 242     if ( m_refData )
 243         return EmptyRgn( M_REGION ) ;
 244     else
 245         return true ;
 246 }
 247
 248 const WXHRGN wxRegion::GetWXHRGN() const
 249 {
 250     return M_REGION ;
 251 }
 252
 253 //-----------------------------------------------------------------------------
 254 //# Tests
 255 //-----------------------------------------------------------------------------
 256
 257 // Does the region contain the point?
 258 wxRegionContain wxRegion::DoContainsPoint(wxCoord x, wxCoord y) const
 259 {
 260     if (!m_refData)
 261         return wxOutRegion;
 262
 263     Point p = { y , x } ;
 264     if (PtInRgn( p , M_REGION ) )
 265         return wxInRegion;
 266
 267     return wxOutRegion;
 268 }
 269
 270 // Does the region contain the rectangle (x, y, w, h)?
 271 wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const
 272 {
 273     if (!m_refData)
 274         return wxOutRegion;
 275
 276     Rect rect = { r.y , r.x , r.y + r.height , r.x + r.width } ;
 277     if (RectInRgn( &rect , M_REGION ) )
 278         return wxInRegion;
 279     else
 280         return wxOutRegion;
 281 }
 282
 283 ///////////////////////////////////////////////////////////////////////////////
 284 //                                                                           //
 285 //                               wxRegionIterator                            //
 286 //                                                                           //
 287 ///////////////////////////////////////////////////////////////////////////////
 288
 289 /*!
 290  * Initialize empty iterator
 291  */
 292 wxRegionIterator::wxRegionIterator()
 293     : m_current(0), m_numRects(0), m_rects(NULL)
 294 {
 295 }
 296
 297 wxRegionIterator::~wxRegionIterator()
 298 {
 299     if (m_rects)
 300     {
 301         delete [] m_rects;
 302         m_rects = NULL;
 303     }
 304 }
 305
 306 wxRegionIterator::wxRegionIterator(const wxRegionIterator& iterator)
 307     : wxObject()
 308     , m_current(iterator.m_current)
 309     , m_numRects(0)
 310     , m_rects(NULL)
 311 {
 312     SetRects(iterator.m_numRects, iterator.m_rects);
 313 }
 314
 315 wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& iterator)
 316 {
 317     m_current  = iterator.m_current;
 318     SetRects(iterator.m_numRects, iterator.m_rects);
 319
 320     return *this;
 321 }
 322
 323 /*!
 324  * Set iterator rects for region
 325  */
 326 void wxRegionIterator::SetRects(long numRects, wxRect *rects)
 327 {
 328     if (m_rects)
 329     {
 330         delete [] m_rects;
 331         m_rects = NULL;
 332     }
 333
 334     if (rects && (numRects > 0))
 335     {
 336         int i;
 337
 338         m_rects = new wxRect[numRects];
 339         for (i = 0; i < numRects; i++)
 340             m_rects[i] = rects[i];
 341     }
 342
 343     m_numRects = numRects;
 344 }
 345
 346 /*!
 347  * Initialize iterator for region
 348  */
 349 wxRegionIterator::wxRegionIterator(const wxRegion& region)
 350 {
 351     m_rects = NULL;
 352
 353     Reset(region);
 354 }
 355
 356 /*!
 357  * Reset iterator for a new /e region.
 358  */
 359
 360 OSStatus wxMacRegionToRectsCounterCallback(
 361     UInt16 message, RgnHandle region, const Rect *rect, void *data )
 362 {
 363     long *m_numRects = (long*) data ;
 364     if ( message == kQDRegionToRectsMsgInit )
 365     {
 366         (*m_numRects) = 0 ;
 367     }
 368     else if (message == kQDRegionToRectsMsgParse)
 369     {
 370         (*m_numRects) += 1 ;
 371     }
 372
 373     return noErr;
 374 }
 375
 376 class RegionToRectsCallbackData
 377 {
 378 public :
 379     wxRect* m_rects ;
 380     long m_current ;
 381 };
 382
 383 OSStatus wxMacRegionToRectsSetterCallback(
 384     UInt16 message, RgnHandle region, const Rect *rect, void *data )
 385 {
 386     if (message == kQDRegionToRectsMsgParse)
 387     {
 388         RegionToRectsCallbackData *cb = (RegionToRectsCallbackData*) data ;
 389         cb->m_rects[cb->m_current++] = wxRect( rect->left , rect->top , rect->right - rect->left , rect->bottom - rect->top ) ;
 390     }
 391
 392     return noErr;
 393 }
 394
 395 void wxRegionIterator::Reset(const wxRegion& region)
 396 {
 397     m_current = 0;
 398     m_region = region;
 399
 400     if (m_rects)
 401     {
 402         delete [] m_rects;
 403         m_rects = NULL;
 404     }
 405
 406     if (m_region.IsEmpty())
 407     {
 408         m_numRects = 0;
 409     }
 410     else
 411     {
 412         RegionToRectsUPP proc =
 413 #ifdef __MACH__
 414         (RegionToRectsUPP) wxMacRegionToRectsCounterCallback;
 415 #else
 416         NewRegionToRectsUPP( wxMacRegionToRectsCounterCallback );
 417 #endif
 418
 419         OSStatus err = noErr;
 420         err = QDRegionToRects (OTHER_M_REGION( region ) , kQDParseRegionFromTopLeft, proc, (void*)&m_numRects);
 421         if (err == noErr)
 422         {
 423 #ifndef __MACH__
 424             DisposeRegionToRectsUPP (proc);
 425 #endif
 426             proc =
 427 #ifdef __MACH__
 428             (RegionToRectsUPP) wxMacRegionToRectsSetterCallback;
 429 #else
 430             NewRegionToRectsUPP (wxMacRegionToRectsSetterCallback);
 431 #endif
 432             m_rects = new wxRect[m_numRects];
 433             RegionToRectsCallbackData data ;
 434             data.m_rects = m_rects ;
 435             data.m_current = 0 ;
 436             QDRegionToRects( OTHER_M_REGION( region ) , kQDParseRegionFromTopLeft, proc, (void*)&data );
 437         }
 438         else
 439         {
 440             m_numRects = 0;
 441         }
 442
 443 #ifndef __MACH__
 444         DisposeRegionToRectsUPP( proc );
 445 #endif
 446     }
 447 }
 448
 449 /*!
 450  * Increment iterator. The rectangle returned is the one after the
 451  * incrementation.
 452  */
 453 wxRegionIterator& wxRegionIterator::operator ++ ()
 454 {
 455     if (m_current < m_numRects)
 456         ++m_current;
 457
 458     return *this;
 459 }
 460
 461 /*!
 462  * Increment iterator. The rectangle returned is the one before the
 463  * incrementation.
 464  */
 465 wxRegionIterator wxRegionIterator::operator ++ (int)
 466 {
 467     wxRegionIterator previous(*this);
 468
 469     if (m_current < m_numRects)
 470         ++m_current;
 471
 472     return previous;
 473 }
 474
 475 long wxRegionIterator::GetX() const
 476 {
 477     if (m_current < m_numRects)
 478         return m_rects[m_current].x;
 479
 480     return 0;
 481 }
 482
 483 long wxRegionIterator::GetY() const
 484 {
 485     if (m_current < m_numRects)
 486         return m_rects[m_current].y;
 487
 488     return 0;
 489 }
 490
 491 long wxRegionIterator::GetW() const
 492 {
 493     if (m_current < m_numRects)
 494         return m_rects[m_current].width ;
 495
 496     return 0;
 497 }
 498
 499 long wxRegionIterator::GetH() const
 500 {
 501     if (m_current < m_numRects)
 502         return m_rects[m_current].height;
 503
 504     return 0;
 505 }