src/mac/carbon/region.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // File:      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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  12 #pragma implementation "region.h"
  13 #endif
  14
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/region.h"
  18 #include "wx/gdicmn.h"
  19 #include "wx/mac/uma.h"
  20
  21 #if !USE_SHARED_LIBRARY
  22     IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
  23     IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
  24 #endif
  25
  26 //-----------------------------------------------------------------------------
  27 // wxRegionRefData implementation
  28 //-----------------------------------------------------------------------------
  29
  30 class WXDLLEXPORT wxRegionRefData : public wxGDIRefData {
  31 public:
  32     wxRegionRefData()
  33     {
  34         m_macRgn = NewRgn() ;
  35     }
  36
  37     wxRegionRefData(const wxRegionRefData& data)
  38         : wxGDIRefData()
  39     {
  40         m_macRgn = NewRgn() ;
  41         CopyRgn( data.m_macRgn , m_macRgn ) ;
  42     }
  43
  44     ~wxRegionRefData()
  45     {
  46         DisposeRgn( m_macRgn ) ;
  47     }
  48     RgnHandle    m_macRgn ;
  49 };
  50
  51 #define M_REGION (((wxRegionRefData*)m_refData)->m_macRgn)
  52 #define OTHER_M_REGION(a) (((wxRegionRefData*)(a.m_refData))->m_macRgn)
  53
  54 //-----------------------------------------------------------------------------
  55 // wxRegion
  56 //-----------------------------------------------------------------------------
  57
  58 /*!
  59  * Create an empty region.
  60  */
  61 wxRegion::wxRegion()
  62 {
  63     m_refData = new wxRegionRefData;
  64 }
  65
  66 wxRegion::wxRegion(WXHRGN hRegion )
  67 {
  68     m_refData = new wxRegionRefData;
  69     CopyRgn( (RgnHandle) hRegion , (RgnHandle) M_REGION ) ;
  70 }
  71
  72 wxRegion::wxRegion(long x, long y, long w, long h)
  73 {
  74     m_refData = new wxRegionRefData;
  75     SetRectRgn( (RgnHandle) M_REGION , x , y , x+w , y+h ) ;
  76 }
  77
  78 wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight)
  79 {
  80     m_refData = new wxRegionRefData;
  81     SetRectRgn( (RgnHandle) M_REGION , topLeft.x , topLeft.y , bottomRight.x , bottomRight.y ) ;
  82 }
  83
  84 wxRegion::wxRegion(const wxRect& rect)
  85 {
  86     m_refData = new wxRegionRefData;
  87     SetRectRgn( (RgnHandle) M_REGION , rect.x , rect.y , rect.x+rect.width , rect.y+rect.height ) ;
  88 }
  89
  90 wxRegion::wxRegion(size_t n, const wxPoint *points, int WXUNUSED(fillStyle))
  91 {
  92     m_refData = new wxRegionRefData;
  93
  94     OpenRgn();
  95
  96     wxCoord x1, x2 , y1 , y2 ;
  97     x2 = x1 = points[0].x ;
  98     y2 = y1 = points[0].y ;
  99     ::MoveTo(x1,y1);
 100     for (size_t i = 1; i < n; i++)
 101     {
 102         x2 = points[i].x ;
 103         y2 = points[i].y ;
 104         ::LineTo(x2, y2);
 105     }
 106     // close the polyline if necessary
 107     if ( x1 != x2 || y1 != y2 )
 108     {
 109         ::LineTo(x1,y1 ) ;
 110     }
 111     ClosePoly();
 112     CloseRgn( M_REGION ) ;
 113 }
 114
 115 /*!
 116  * Destroy the region.
 117  */
 118 wxRegion::~wxRegion()
 119 {
 120     // m_refData unrefed in ~wxObject
 121 }
 122
 123 //-----------------------------------------------------------------------------
 124 //# Modify region
 125 //-----------------------------------------------------------------------------
 126
 127 //! Clear current region
 128 void wxRegion::Clear()
 129 {
 130     UnRef();
 131 }
 132
 133 // Move the region
 134 bool wxRegion::Offset(wxCoord x, wxCoord y)
 135 {
 136     wxCHECK_MSG( M_REGION, false, _T("invalid wxRegion") );
 137
 138     if ( !x && !y )
 139     {
 140         // nothing to do
 141         return true;
 142     }
 143
 144     OffsetRgn( M_REGION , x , y ) ;
 145     return true ;
 146 }
 147
 148
 149 //! Combine rectangle (x, y, w, h) with this.
 150 bool wxRegion::Combine(long x, long y, long width, long height, wxRegionOp op)
 151 {
 152     // Don't change shared data
 153     if (!m_refData)
 154     {
 155         m_refData = new wxRegionRefData();
 156     }
 157     else if (m_refData->GetRefCount() > 1)
 158     {
 159         wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 160         UnRef();
 161         m_refData = new wxRegionRefData(*ref);
 162     }
 163     RgnHandle rgn = NewRgn() ;
 164         SetRectRgn( rgn , x , y, x+width,y + height ) ;
 165
 166     switch (op)
 167     {
 168         case wxRGN_AND:
 169             SectRgn( M_REGION , rgn , M_REGION ) ;
 170             break ;
 171         case wxRGN_OR:
 172             UnionRgn( M_REGION , rgn , M_REGION ) ;
 173             break ;
 174         case wxRGN_XOR:
 175              XorRgn( M_REGION , rgn , M_REGION ) ;
 176             break ;
 177         case wxRGN_DIFF:
 178             DiffRgn( M_REGION , rgn , M_REGION ) ;
 179             break ;
 180         case wxRGN_COPY:
 181         default:
 182                    CopyRgn( rgn ,M_REGION ) ;
 183             break ;
 184     }
 185
 186         DisposeRgn( rgn ) ;
 187
 188     return TRUE;
 189 }
 190
 191 //! Union /e region with this.
 192 bool wxRegion::Combine(const wxRegion& region, wxRegionOp op)
 193 {
 194     if (region.Empty())
 195         return FALSE;
 196
 197     // Don't change shared data
 198     if (!m_refData) {
 199         m_refData = new wxRegionRefData();
 200     }
 201     else    if (m_refData->GetRefCount() > 1)
 202     {
 203         wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 204         UnRef();
 205         m_refData = new wxRegionRefData(*ref);
 206     }
 207
 208     switch (op)
 209     {
 210         case wxRGN_AND:
 211             SectRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 212             break ;
 213         case wxRGN_OR:
 214             UnionRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 215             break ;
 216         case wxRGN_XOR:
 217              XorRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 218             break ;
 219         case wxRGN_DIFF:
 220             DiffRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 221             break ;
 222         case wxRGN_COPY:
 223         default:
 224                    CopyRgn( OTHER_M_REGION(region) ,M_REGION ) ;
 225             break ;
 226     }
 227
 228     return TRUE;
 229 }
 230
 231 bool wxRegion::Combine(const wxRect& rect, wxRegionOp op)
 232 {
 233     return Combine(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight(), op);
 234 }
 235
 236 //-----------------------------------------------------------------------------
 237 //# Information on region
 238 //-----------------------------------------------------------------------------
 239
 240 // Outer bounds of region
 241 void wxRegion::GetBox(wxCoord& x, wxCoord& y, wxCoord& w, wxCoord& h) const
 242 {
 243     if (m_refData)
 244     {
 245         Rect box ;
 246         GetRegionBounds( M_REGION , &box ) ;
 247         x = box.left ;
 248         y = box.top ;
 249         w = box.right - box.left ;
 250         h = box.bottom - box.top ;
 251     }
 252     else
 253     {
 254         x = y = w = h = 0;
 255     }
 256 }
 257
 258 wxRect wxRegion::GetBox() const
 259 {
 260     wxCoord x, y, w, h;
 261     GetBox(x, y, w, h);
 262     return wxRect(x, y, w, h);
 263 }
 264
 265 // Is region empty?
 266 bool wxRegion::Empty() const
 267 {
 268     return EmptyRgn( M_REGION ) ;
 269 }
 270
 271 const WXHRGN wxRegion::GetWXHRGN() const
 272 {
 273     return M_REGION ;
 274 }
 275
 276 //-----------------------------------------------------------------------------
 277 //# Tests
 278 //-----------------------------------------------------------------------------
 279
 280 // Does the region contain the point (x,y)?
 281 wxRegionContain wxRegion::Contains(long x, long y) const
 282 {
 283     if (!m_refData)
 284         return wxOutRegion;
 285
 286     // TODO. Return wxInRegion if within region.
 287     if (0)
 288         return wxInRegion;
 289     return wxOutRegion;
 290 }
 291
 292 // Does the region contain the point pt?
 293 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 294 {
 295     if (!m_refData)
 296         return wxOutRegion;
 297
 298     Point p = { pt.y , pt.x } ;
 299     if (PtInRgn( p , M_REGION ) )
 300         return wxInRegion;
 301
 302     return wxOutRegion;
 303 }
 304
 305 // Does the region contain the rectangle (x, y, w, h)?
 306 wxRegionContain wxRegion::Contains(long x, long y, long w, long h) const
 307 {
 308     if (!m_refData)
 309         return wxOutRegion;
 310
 311     Rect rect = { y , x , y + h , x + w } ;
 312     if (RectInRgn( &rect , M_REGION ) )
 313         return wxInRegion;
 314     else
 315         return wxOutRegion;
 316 }
 317
 318 // Does the region contain the rectangle rect
 319 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 320 {
 321     if (!m_refData)
 322         return wxOutRegion;
 323
 324     long x, y, w, h;
 325     x = rect.x;
 326     y = rect.y;
 327     w = rect.GetWidth();
 328     h = rect.GetHeight();
 329     return Contains(x, y, w, h);
 330 }
 331
 332 ///////////////////////////////////////////////////////////////////////////////
 333 //                                                                           //
 334 //                               wxRegionIterator                            //
 335 //                                                                           //
 336 ///////////////////////////////////////////////////////////////////////////////
 337
 338 /*!
 339  * Initialize empty iterator
 340  */
 341 wxRegionIterator::wxRegionIterator()
 342     : m_current(0), m_numRects(0), m_rects(NULL)
 343 {
 344 }
 345
 346 wxRegionIterator::~wxRegionIterator()
 347 {
 348     if (m_rects) {
 349         delete[] m_rects;
 350         m_rects = NULL;
 351     }
 352 }
 353
 354 wxRegionIterator::wxRegionIterator(const wxRegionIterator& iterator)
 355     : wxObject()
 356     , m_current(iterator.m_current)
 357     , m_numRects(0)
 358     , m_rects(NULL)
 359 {
 360     SetRects(iterator.m_numRects, iterator.m_rects);
 361 }
 362
 363 wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& iterator)
 364 {
 365     m_current  = iterator.m_current;
 366     SetRects(iterator.m_numRects, iterator.m_rects);
 367     return *this;
 368 }
 369
 370 /*!
 371  * Set iterator rects for region
 372  */
 373 void wxRegionIterator::SetRects(long numRects, wxRect *rects)
 374 {
 375     if (m_rects) {
 376         delete[] m_rects;
 377         m_rects = NULL;
 378     }
 379     if (rects)
 380     {
 381         int i;
 382         m_rects = new wxRect[numRects];
 383         for (i = 0; i < numRects; i++)
 384             m_rects[i] = rects[i];
 385     }
 386     m_numRects = numRects;
 387 }
 388
 389 /*!
 390  * Initialize iterator for region
 391  */
 392 wxRegionIterator::wxRegionIterator(const wxRegion& region)
 393 {
 394     m_rects = NULL;
 395
 396     Reset(region);
 397 }
 398
 399 /*!
 400  * Reset iterator for a new /e region.
 401  */
 402
 403 OSStatus wxMacRegionToRectsCounterCallback (
 404     UInt16 message, RgnHandle region, const Rect *rect, void *data)
 405 {
 406     long *m_numRects = (long*) data ;
 407     if ( message == kQDRegionToRectsMsgInit )
 408     {
 409         (*m_numRects) = 0 ;
 410     }
 411     else if (message == kQDRegionToRectsMsgParse)
 412     {
 413         (*m_numRects) += 1 ;
 414     }
 415     return noErr;
 416 }
 417
 418 class RegionToRectsCallbackData
 419 {
 420 public :
 421     wxRect* m_rects ;
 422     long m_current ;
 423 } ;
 424
 425 OSStatus wxMacRegionToRectsSetterCallback (
 426     UInt16 message, RgnHandle region, const Rect *rect, void *data)
 427 {
 428     if (message == kQDRegionToRectsMsgParse)
 429     {
 430         RegionToRectsCallbackData *cb = (RegionToRectsCallbackData*) data ;
 431         cb->m_rects[cb->m_current++] = wxRect( rect->left , rect->top , rect->right - rect->left , rect->bottom - rect->top ) ;
 432     }
 433     return noErr;
 434 }
 435
 436 void wxRegionIterator::Reset(const wxRegion& region)
 437 {
 438     m_current = 0;
 439     m_region = region;
 440
 441     if (m_rects) {
 442         delete[] m_rects;
 443         m_rects = NULL;
 444     }
 445
 446     if (m_region.Empty())
 447         m_numRects = 0;
 448     else
 449     {
 450         RegionToRectsUPP proc = NewRegionToRectsUPP (wxMacRegionToRectsCounterCallback);
 451
 452         OSStatus err = noErr;
 453         err = QDRegionToRects (OTHER_M_REGION( region ) , kQDParseRegionFromTopLeft, proc, (void*)&m_numRects);
 454         if (err == noErr)
 455         {
 456             DisposeRegionToRectsUPP (proc);
 457             proc = NewRegionToRectsUPP (wxMacRegionToRectsSetterCallback);
 458             m_rects = new wxRect[m_numRects];
 459             RegionToRectsCallbackData data ;
 460             data.m_rects = m_rects ;
 461             data.m_current = 0 ;
 462             QDRegionToRects (OTHER_M_REGION( region ) , kQDParseRegionFromTopLeft, proc, (void*)&data);
 463         }
 464         else
 465         {
 466             m_numRects = 0 ;
 467         }
 468         DisposeRegionToRectsUPP (proc);
 469     }
 470 }
 471
 472 /*!
 473  * Increment iterator. The rectangle returned is the one after the
 474  * incrementation.
 475  */
 476 wxRegionIterator& wxRegionIterator::operator ++ ()
 477 {
 478     if (m_current < m_numRects)
 479         ++m_current;
 480     return *this;
 481 }
 482
 483 /*!
 484  * Increment iterator. The rectangle returned is the one before the
 485  * incrementation.
 486  */
 487 wxRegionIterator wxRegionIterator::operator ++ (int)
 488 {
 489     wxRegionIterator previous(*this);
 490
 491     if (m_current < m_numRects)
 492         ++m_current;
 493
 494     return previous;
 495 }
 496
 497 long wxRegionIterator::GetX() const
 498 {
 499     if (m_current < m_numRects)
 500         return m_rects[m_current].x;
 501     return 0;
 502 }
 503
 504 long wxRegionIterator::GetY() const
 505 {
 506     if (m_current < m_numRects)
 507         return m_rects[m_current].y;
 508     return 0;
 509 }
 510
 511 long wxRegionIterator::GetW() const
 512 {
 513     if (m_current < m_numRects)
 514         return m_rects[m_current].width ;
 515     return 0;
 516 }
 517
 518 long wxRegionIterator::GetH() const
 519 {
 520     if (m_current < m_numRects)
 521         return m_rects[m_current].height;
 522     return 0;
 523 }
 524