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 #include "wx/mac/uma.h"
  18
  19 #if !USE_SHARED_LIBRARY
  20         IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
  21         IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
  22 #endif
  23
  24 //-----------------------------------------------------------------------------
  25 // wxRegionRefData implementation
  26 //-----------------------------------------------------------------------------
  27
  28 class WXDLLEXPORT wxRegionRefData : public wxGDIRefData {
  29 public:
  30         wxRegionRefData()
  31         {
  32                 m_macRgn = NewRgn() ;
  33         }
  34
  35         wxRegionRefData(const wxRegionRefData& data)
  36         {
  37                 m_macRgn = NewRgn() ;
  38         CopyRgn( data.m_macRgn , m_macRgn ) ;
  39         }
  40
  41         ~wxRegionRefData()
  42         {
  43         DisposeRgn( m_macRgn ) ;
  44         }
  45         RgnHandle       m_macRgn ;
  46 };
  47
  48 #define M_REGION (((wxRegionRefData*)m_refData)->m_macRgn)
  49 #define OTHER_M_REGION(a) (((wxRegionRefData*)(a.m_refData))->m_macRgn)
  50
  51 //-----------------------------------------------------------------------------
  52 // wxRegion
  53 //-----------------------------------------------------------------------------
  54
  55 /*!
  56  * Create an empty region.
  57  */
  58 wxRegion::wxRegion()
  59 {
  60     m_refData = new wxRegionRefData;
  61 }
  62
  63 wxRegion::wxRegion(WXHRGN hRegion )
  64 {
  65     m_refData = new wxRegionRefData;
  66     CopyRgn( hRegion , M_REGION ) ;
  67 }
  68
  69 wxRegion::wxRegion(long x, long y, long w, long h)
  70 {
  71     m_refData = new wxRegionRefData;
  72     SetRectRgn( M_REGION , x , y , x+w , y+h ) ;
  73 }
  74
  75 wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight)
  76 {
  77     m_refData = new wxRegionRefData;
  78     SetRectRgn( M_REGION , topLeft.x , topLeft.y , bottomRight.x , bottomRight.y ) ;
  79 }
  80
  81 wxRegion::wxRegion(const wxRect& rect)
  82 {
  83     m_refData = new wxRegionRefData;
  84     SetRectRgn( M_REGION , rect.x , rect.y , rect.x+rect.width , rect.y+rect.height ) ;
  85 }
  86
  87 /*!
  88  * Destroy the region.
  89  */
  90 wxRegion::~wxRegion()
  91 {
  92     // m_refData unrefed in ~wxObject
  93 }
  94
  95 //-----------------------------------------------------------------------------
  96 //# Modify region
  97 //-----------------------------------------------------------------------------
  98
  99 //! Clear current region
 100 void wxRegion::Clear()
 101 {
 102     UnRef();
 103 }
 104
 105 //! Combine rectangle (x, y, w, h) with this.
 106 bool wxRegion::Combine(long x, long y, long width, long height, wxRegionOp op)
 107 {
 108         // Don't change shared data
 109         if (!m_refData)
 110         {
 111                 m_refData = new wxRegionRefData();
 112         }
 113         else if (m_refData->GetRefCount() > 1)
 114         {
 115                 wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 116                 UnRef();
 117                 m_refData = new wxRegionRefData(*ref);
 118         }
 119     RgnHandle rgn = NewRgn() ;
 120                 SetRectRgn( rgn , x , y, x+width,y + height ) ;
 121
 122     switch (op)
 123     {
 124         case wxRGN_AND:
 125             SectRgn( M_REGION , rgn , M_REGION ) ;
 126             break ;
 127         case wxRGN_OR:
 128             UnionRgn( M_REGION , rgn , M_REGION ) ;
 129             break ;
 130         case wxRGN_XOR:
 131              XorRgn( M_REGION , rgn , M_REGION ) ;
 132             break ;
 133         case wxRGN_DIFF:
 134             DiffRgn( M_REGION , rgn , M_REGION ) ;
 135             break ;
 136         case wxRGN_COPY:
 137         default:
 138                         CopyRgn( rgn ,M_REGION ) ;
 139             break ;
 140     }
 141
 142                 DisposeRgn( rgn ) ;
 143
 144     return TRUE;
 145 }
 146
 147 //! Union /e region with this.
 148 bool wxRegion::Combine(const wxRegion& region, wxRegionOp op)
 149 {
 150         if (region.Empty())
 151                 return FALSE;
 152
 153         // Don't change shared data
 154         if (!m_refData) {
 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
 164     switch (op)
 165     {
 166         case wxRGN_AND:
 167             SectRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 168             break ;
 169         case wxRGN_OR:
 170             UnionRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 171             break ;
 172         case wxRGN_XOR:
 173              XorRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 174             break ;
 175         case wxRGN_DIFF:
 176             DiffRgn( M_REGION , OTHER_M_REGION(region) , M_REGION ) ;
 177             break ;
 178         case wxRGN_COPY:
 179         default:
 180                         CopyRgn( OTHER_M_REGION(region) ,M_REGION ) ;
 181             break ;
 182     }
 183
 184         return TRUE;
 185 }
 186
 187 bool wxRegion::Combine(const wxRect& rect, wxRegionOp op)
 188 {
 189     return Combine(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight(), op);
 190 }
 191
 192 //-----------------------------------------------------------------------------
 193 //# Information on region
 194 //-----------------------------------------------------------------------------
 195
 196 // Outer bounds of region
 197 void wxRegion::GetBox(long& x, long& y, long&w, long &h) const
 198 {
 199         if (m_refData)
 200         {
 201                 Rect box ;
 202                 GetRegionBounds( M_REGION , &box ) ;
 203         x = box.left ;
 204         y = box.top ;
 205         w = box.right - box.left ;
 206         h = box.bottom - box.top ;
 207         }
 208         else
 209         {
 210                 x = y = w = h = 0;
 211         }
 212 }
 213
 214 wxRect wxRegion::GetBox() const
 215 {
 216     long x, y, w, h;
 217     GetBox(x, y, w, h);
 218     return wxRect(x, y, w, h);
 219 }
 220
 221 // Is region empty?
 222 bool wxRegion::Empty() const
 223 {
 224     return EmptyRgn( M_REGION ) ;
 225 }
 226
 227 const WXHRGN wxRegion::GetWXHRGN() const
 228 {
 229         return M_REGION ;
 230 }
 231
 232 //-----------------------------------------------------------------------------
 233 //# Tests
 234 //-----------------------------------------------------------------------------
 235
 236 // Does the region contain the point (x,y)?
 237 wxRegionContain wxRegion::Contains(long x, long y) const
 238 {
 239         if (!m_refData)
 240                 return wxOutRegion;
 241
 242     // TODO. Return wxInRegion if within region.
 243     if (0)
 244         return wxInRegion;
 245     return wxOutRegion;
 246 }
 247
 248 // Does the region contain the point pt?
 249 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 250 {
 251         if (!m_refData)
 252                 return wxOutRegion;
 253
 254     Point p = { pt.y , pt.x } ;
 255     if (PtInRgn( p , M_REGION ) )
 256         return wxInRegion;
 257
 258     return wxOutRegion;
 259 }
 260
 261 // Does the region contain the rectangle (x, y, w, h)?
 262 wxRegionContain wxRegion::Contains(long x, long y, long w, long h) const
 263 {
 264         if (!m_refData)
 265                 return wxOutRegion;
 266
 267     Rect rect = { y , x , y + h , x + w } ;
 268     if (RectInRgn( &rect , M_REGION ) )
 269         return wxInRegion;
 270     else
 271         return wxOutRegion;
 272 }
 273
 274 // Does the region contain the rectangle rect
 275 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 276 {
 277         if (!m_refData)
 278                 return wxOutRegion;
 279
 280     long x, y, w, h;
 281     x = rect.x;
 282     y = rect.y;
 283     w = rect.GetWidth();
 284     h = rect.GetHeight();
 285     return Contains(x, y, w, h);
 286 }
 287
 288 ///////////////////////////////////////////////////////////////////////////////
 289 //                                                                                                                                                       //
 290 //                                                         wxRegionIterator                                                              //
 291 //                                                                                                                                                       //
 292 ///////////////////////////////////////////////////////////////////////////////
 293
 294 /*!
 295  * Initialize empty iterator
 296  */
 297 wxRegionIterator::wxRegionIterator() : m_current(0), m_numRects(0), m_rects(NULL)
 298 {
 299 }
 300
 301 wxRegionIterator::~wxRegionIterator()
 302 {
 303     if (m_rects)
 304         delete[] m_rects;
 305 }
 306
 307 /*!
 308  * Initialize iterator for region
 309  */
 310 wxRegionIterator::wxRegionIterator(const wxRegion& region)
 311 {
 312     m_rects = NULL;
 313
 314         Reset(region);
 315 }
 316
 317 /*!
 318  * Reset iterator for a new /e region.
 319  */
 320 void wxRegionIterator::Reset(const wxRegion& region)
 321 {
 322         m_current = 0;
 323         m_region = region;
 324
 325     if (m_rects)
 326         delete[] m_rects;
 327
 328     m_rects = NULL;
 329
 330         if (m_region.Empty())
 331                 m_numRects = 0;
 332         else
 333     {
 334         // we cannot dissolve it into rects on mac
 335         m_rects = new wxRect[1];
 336                 Rect rect ;
 337                 GetRegionBounds( OTHER_M_REGION( region ) , &rect ) ;
 338         m_rects[0].x = rect.left;
 339         m_rects[0].y = rect.top;
 340         m_rects[0].width = rect.right - rect.left;
 341         m_rects[0].height = rect.bottom - rect.top;
 342         m_numRects = 1;
 343     }
 344 }
 345
 346 /*!
 347  * Increment iterator. The rectangle returned is the one after the
 348  * incrementation.
 349  */
 350 void wxRegionIterator::operator ++ ()
 351 {
 352         if (m_current < m_numRects)
 353                 ++m_current;
 354 }
 355
 356 /*!
 357  * Increment iterator. The rectangle returned is the one before the
 358  * incrementation.
 359  */
 360 void wxRegionIterator::operator ++ (int)
 361 {
 362         if (m_current < m_numRects)
 363                 ++m_current;
 364 }
 365
 366 long wxRegionIterator::GetX() const
 367 {
 368         if (m_current < m_numRects)
 369                 return m_rects[m_current].x;
 370         return 0;
 371 }
 372
 373 long wxRegionIterator::GetY() const
 374 {
 375         if (m_current < m_numRects)
 376                 return m_rects[m_current].y;
 377         return 0;
 378 }
 379
 380 long wxRegionIterator::GetW() const
 381 {
 382         if (m_current < m_numRects)
 383                 return m_rects[m_current].width ;
 384         return 0;
 385 }
 386
 387 long wxRegionIterator::GetH() const
 388 {
 389         if (m_current < m_numRects)
 390                 return m_rects[m_current].height;
 391         return 0;
 392 }
 393