src/mac/region.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // File:      region.cpp
   3 // Purpose:   Region class
   4 // Author:    Markus Holzem/Julian Smart/AUTHOR
   5 // Created:   Fri Oct 24 10:46:34 MET 1997
   6 // RCS-ID:        $Id$
   7 // Copyright: (c) 1997 Markus Holzem/Julian Smart/AUTHOR
   8 // Licence:   wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #ifdef __GNUG__
  12 #pragma implementation "region.h"
  13 #endif
  14
  15 #include "wx/region.h"
  16 #include "wx/gdicmn.h"
  17
  18 #if !USE_SHARED_LIBRARY
  19         IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
  20         IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
  21 #endif
  22
  23 //-----------------------------------------------------------------------------
  24 // wxRegionRefData implementation
  25 //-----------------------------------------------------------------------------
  26
  27 class WXDLLEXPORT wxRegionRefData : public wxGDIRefData {
  28 public:
  29         wxRegionRefData()
  30         {
  31                 m_macRgn = NewRgn() ;
  32         }
  33
  34         wxRegionRefData(const wxRegionRefData& data)
  35         {
  36                 m_macRgn = NewRgn() ;
  37         CopyRgn( data.m_macRgn , m_macRgn ) ;
  38         }
  39
  40         ~wxRegionRefData()
  41         {
  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( hRegion , M_REGION ) ;
  66 }
  67
  68 wxRegion::wxRegion(long x, long y, long w, long h)
  69 {
  70     m_refData = new wxRegionRefData;
  71     SetRectRgn( 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( 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( M_REGION , rect.x , rect.y , rect.x+rect.width , rect.y+rect.height ) ;
  84 }
  85
  86 /*!
  87  * Destroy the region.
  88  */
  89 wxRegion::~wxRegion()
  90 {
  91     // m_refData unrefed in ~wxObject
  92 }
  93
  94 //-----------------------------------------------------------------------------
  95 //# Modify region
  96 //-----------------------------------------------------------------------------
  97
  98 //! Clear current region
  99 void wxRegion::Clear()
 100 {
 101     UnRef();
 102 }
 103
 104 //! Combine rectangle (x, y, w, h) with this.
 105 bool wxRegion::Combine(long x, long y, long width, long height, wxRegionOp op)
 106 {
 107         // Don't change shared data
 108         if (!m_refData)
 109         {
 110                 m_refData = new wxRegionRefData();
 111         }
 112         else if (m_refData->GetRefCount() > 1)
 113         {
 114                 wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 115                 UnRef();
 116                 m_refData = new wxRegionRefData(*ref);
 117         }
 118     RgnHandle rgn = NewRgn() ;
 119                 SetRectRgn( rgn , x , y, x+width,y + height ) ;
 120
 121     switch (op)
 122     {
 123         case wxRGN_AND:
 124             SectRgn( M_REGION , rgn , M_REGION ) ;
 125             break ;
 126         case wxRGN_OR:
 127             UnionRgn( M_REGION , rgn , M_REGION ) ;
 128             break ;
 129         case wxRGN_XOR:
 130              XorRgn( M_REGION , rgn , M_REGION ) ;
 131             break ;
 132         case wxRGN_DIFF:
 133             DiffRgn( M_REGION , rgn , M_REGION ) ;
 134             break ;
 135         case wxRGN_COPY:
 136         default:
 137                         CopyRgn( rgn ,M_REGION ) ;
 138             break ;
 139     }
 140
 141                 DisposeRgn( rgn ) ;
 142
 143     return TRUE;
 144 }
 145
 146 //! Union /e region with this.
 147 bool wxRegion::Combine(const wxRegion& region, wxRegionOp op)
 148 {
 149         if (region.Empty())
 150                 return FALSE;
 151
 152         // Don't change shared data
 153         if (!m_refData) {
 154                 m_refData = new wxRegionRefData();
 155         }
 156         else    if (m_refData->GetRefCount() > 1)
 157         {
 158                 wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 159                 UnRef();
 160                 m_refData = new wxRegionRefData(*ref);
 161         }
 162
 163     switch (op)
 164     {
 165         case wxRGN_AND:
 166             SectRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 167             break ;
 168         case wxRGN_OR:
 169             UnionRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 170             break ;
 171         case wxRGN_XOR:
 172              XorRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 173             break ;
 174         case wxRGN_DIFF:
 175             DiffRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 176             break ;
 177         case wxRGN_COPY:
 178         default:
 179                         CopyRgn( OTHER_M_REGION(region) ,M_REGION ) ;
 180             break ;
 181     }
 182
 183         return TRUE;
 184 }
 185
 186 bool wxRegion::Combine(const wxRect& rect, wxRegionOp op)
 187 {
 188     return Combine(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight(), op);
 189 }
 190
 191 //-----------------------------------------------------------------------------
 192 //# Information on region
 193 //-----------------------------------------------------------------------------
 194
 195 // Outer bounds of region
 196 void wxRegion::GetBox(long& x, long& y, long&w, long &h) const
 197 {
 198         if (m_refData)
 199         {
 200                 Rect box = (**M_REGION).rgnBBox ;
 201         x = box.left ;
 202         y = box.top ;
 203         w = box.right - box.left ;
 204         h = box.bottom - box.top ;
 205         }
 206         else
 207         {
 208                 x = y = w = h = 0;
 209         }
 210 }
 211
 212 wxRect wxRegion::GetBox() const
 213 {
 214     long x, y, w, h;
 215     GetBox(x, y, w, h);
 216     return wxRect(x, y, w, h);
 217 }
 218
 219 // Is region empty?
 220 bool wxRegion::Empty() const
 221 {
 222     return EmptyRgn( M_REGION ) ;
 223 }
 224
 225 const WXHRGN wxRegion::GetWXHRGN() const
 226 {
 227         return M_REGION ;
 228 }
 229
 230 //-----------------------------------------------------------------------------
 231 //# Tests
 232 //-----------------------------------------------------------------------------
 233
 234 // Does the region contain the point (x,y)?
 235 wxRegionContain wxRegion::Contains(long x, long y) const
 236 {
 237         if (!m_refData)
 238                 return wxOutRegion;
 239
 240     // TODO. Return wxInRegion if within region.
 241     if (0)
 242         return wxInRegion;
 243     return wxOutRegion;
 244 }
 245
 246 // Does the region contain the point pt?
 247 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 248 {
 249         if (!m_refData)
 250                 return wxOutRegion;
 251
 252     Point p = { pt.y , pt.x } ;
 253     if (PtInRgn( p , M_REGION ) )
 254         return wxInRegion;
 255
 256     return wxOutRegion;
 257 }
 258
 259 // Does the region contain the rectangle (x, y, w, h)?
 260 wxRegionContain wxRegion::Contains(long x, long y, long w, long h) const
 261 {
 262         if (!m_refData)
 263                 return wxOutRegion;
 264
 265     Rect rect = { y , x , y + h , x + w } ;
 266     if (RectInRgn( &rect , M_REGION ) )
 267         return wxInRegion;
 268     else
 269         return wxOutRegion;
 270 }
 271
 272 // Does the region contain the rectangle rect
 273 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 274 {
 275         if (!m_refData)
 276                 return wxOutRegion;
 277
 278     long x, y, w, h;
 279     x = rect.x;
 280     y = rect.y;
 281     w = rect.GetWidth();
 282     h = rect.GetHeight();
 283     return Contains(x, y, w, h);
 284 }
 285
 286 ///////////////////////////////////////////////////////////////////////////////
 287 //                                                                                                                                                       //
 288 //                                                         wxRegionIterator                                                              //
 289 //                                                                                                                                                       //
 290 ///////////////////////////////////////////////////////////////////////////////
 291
 292 /*!
 293  * Initialize empty iterator
 294  */
 295 wxRegionIterator::wxRegionIterator() : m_current(0), m_numRects(0), m_rects(NULL)
 296 {
 297 }
 298
 299 wxRegionIterator::~wxRegionIterator()
 300 {
 301     if (m_rects)
 302         delete[] m_rects;
 303 }
 304
 305 /*!
 306  * Initialize iterator for region
 307  */
 308 wxRegionIterator::wxRegionIterator(const wxRegion& region)
 309 {
 310     m_rects = NULL;
 311
 312         Reset(region);
 313 }
 314
 315 /*!
 316  * Reset iterator for a new /e region.
 317  */
 318 void wxRegionIterator::Reset(const wxRegion& region)
 319 {
 320         m_current = 0;
 321         m_region = region;
 322
 323     if (m_rects)
 324         delete[] m_rects;
 325
 326     m_rects = NULL;
 327
 328         if (m_region.Empty())
 329                 m_numRects = 0;
 330         else
 331     {
 332         // we cannot dissolve it into rects on mac
 333         m_rects = new wxRect[1];
 334         Rect rect = (**OTHER_M_REGION( region )).rgnBBox ;
 335         m_rects[0].x = rect.left;
 336         m_rects[0].y = rect.top;
 337         m_rects[0].width = rect.right - rect.left;
 338         m_rects[0].height = rect.bottom - rect.top;
 339         m_numRects = 1;
 340     }
 341 }
 342
 343 /*!
 344  * Increment iterator. The rectangle returned is the one after the
 345  * incrementation.
 346  */
 347 void wxRegionIterator::operator ++ ()
 348 {
 349         if (m_current < m_numRects)
 350                 ++m_current;
 351 }
 352
 353 /*!
 354  * Increment iterator. The rectangle returned is the one before the
 355  * incrementation.
 356  */
 357 void wxRegionIterator::operator ++ (int)
 358 {
 359         if (m_current < m_numRects)
 360                 ++m_current;
 361 }
 362
 363 long wxRegionIterator::GetX() const
 364 {
 365         if (m_current < m_numRects)
 366                 return m_rects[m_current].x;
 367         return 0;
 368 }
 369
 370 long wxRegionIterator::GetY() const
 371 {
 372         if (m_current < m_numRects)
 373                 return m_rects[m_current].y;
 374         return 0;
 375 }
 376
 377 long wxRegionIterator::GetW() const
 378 {
 379         if (m_current < m_numRects)
 380                 return m_rects[m_current].width ;
 381         return 0;
 382 }
 383
 384 long wxRegionIterator::GetH() const
 385 {
 386         if (m_current < m_numRects)
 387                 return m_rects[m_current].height;
 388         return 0;
 389 }
 390