src/motif/region.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // File:      region.cpp
   3 // Purpose:   Region class
   4 // Author:    Markus Holzem/Julian Smart
   5 // Created:   Fri Oct 24 10:46:34 MET 1997
   6 // RCS-ID:      $Id$
   7 // Copyright: (c) 1997 Markus Holzem/Julian Smart
   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 #include <Xm/Xm.h>
  19 // #include "wx/motif/private.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_region = XCreateRegion();
  35     }
  36
  37     wxRegionRefData(const wxRegionRefData& data)
  38     {
  39         m_region = XCreateRegion();
  40         XUnionRegion(m_region, data.m_region, m_region);
  41     }
  42
  43     ~wxRegionRefData()
  44     {
  45         XDestroyRegion(m_region);
  46     }
  47     Region  m_region;
  48 };
  49
  50 #define M_REGION (((wxRegionRefData*)m_refData)->m_region)
  51
  52 //-----------------------------------------------------------------------------
  53 // wxRegion
  54 //-----------------------------------------------------------------------------
  55
  56 /*!
  57  * Create an empty region.
  58  */
  59 wxRegion::wxRegion()
  60 {
  61 }
  62
  63 wxRegion::wxRegion(long x, long y, long w, long h)
  64 {
  65     m_refData = new wxRegionRefData;
  66
  67     XRectangle rect;
  68     rect.x        = x;
  69     rect.y        = y;
  70     rect.width    = w;
  71     rect.height = h;
  72     XUnionRectWithRegion(&rect, M_REGION, M_REGION);
  73 }
  74
  75 wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight)
  76 {
  77     m_refData = new wxRegionRefData;
  78
  79     XRectangle rect;
  80     rect.x        = topLeft.x;
  81     rect.y        = topLeft.y;
  82     rect.width    = bottomRight.x - topLeft.x;
  83     rect.height = bottomRight.y - topLeft.y;
  84     XUnionRectWithRegion(&rect, M_REGION, M_REGION);
  85 }
  86
  87 wxRegion::wxRegion(const wxRect& rect)
  88 {
  89     m_refData = new wxRegionRefData;
  90
  91     XRectangle rect1;
  92     rect1.x        = rect.x;
  93     rect1.y        = rect.y;
  94     rect1.width    = rect.width;
  95     rect1.height = rect.height;
  96     XUnionRectWithRegion(&rect1, M_REGION, M_REGION);
  97 }
  98
  99 /*!
 100  * Destroy the region.
 101  */
 102 wxRegion::~wxRegion()
 103 {
 104     // m_refData unrefed in ~wxObject
 105 }
 106
 107 // Get the internal region handle
 108 WXRegion wxRegion::GetXRegion() const
 109 {
 110     wxASSERT( m_refData !=NULL );
 111
 112     return (WXRegion) ((wxRegionRefData*)m_refData)->m_region;
 113 }
 114
 115 //-----------------------------------------------------------------------------
 116 //# Modify region
 117 //-----------------------------------------------------------------------------
 118
 119 //! Clear current region
 120 void wxRegion::Clear()
 121 {
 122     UnRef();
 123 }
 124
 125 //! Combine rectangle (x, y, w, h) with this.
 126 bool wxRegion::Combine(long x, long y, long width, long height, wxRegionOp op)
 127 {
 128     // Don't change shared data
 129     if (!m_refData) {
 130         m_refData = new wxRegionRefData();
 131     } else if (m_refData->GetRefCount() > 1) {
 132         wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 133         UnRef();
 134         m_refData = new wxRegionRefData(*ref);
 135     }
 136     // If ref count is 1, that means it's 'ours' anyway so no action.
 137
 138     Region rectRegion = XCreateRegion();
 139
 140     XRectangle rect;
 141     rect.x        = x;
 142     rect.y        = y;
 143     rect.width    = width;
 144     rect.height = height;
 145     XUnionRectWithRegion(&rect, rectRegion, rectRegion);
 146
 147     switch (op)
 148     {
 149         case wxRGN_AND:
 150             XIntersectRegion(M_REGION, rectRegion, M_REGION);
 151             break ;
 152         case wxRGN_OR:
 153             XUnionRegion(M_REGION, rectRegion, M_REGION);
 154             break ;
 155         case wxRGN_XOR:
 156             // TODO
 157             break ;
 158         case wxRGN_DIFF:
 159             // TODO
 160             break ;
 161         case wxRGN_COPY: // Don't have to do this one
 162         default:
 163             // TODO
 164             break ;
 165     }
 166
 167     return FALSE;
 168 }
 169
 170 //! Union /e region with this.
 171 bool wxRegion::Combine(const wxRegion& region, wxRegionOp op)
 172 {
 173     if (region.Empty())
 174         return FALSE;
 175
 176     // Don't change shared data
 177     if (!m_refData) {
 178         m_refData = new wxRegionRefData();
 179     } else    if (m_refData->GetRefCount() > 1) {
 180         wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 181         UnRef();
 182         m_refData = new wxRegionRefData(*ref);
 183     }
 184
 185     switch (op)
 186     {
 187         case wxRGN_AND:
 188             XIntersectRegion(M_REGION, ((wxRegionRefData*)region.m_refData)->m_region,
 189                  M_REGION);
 190             break ;
 191         case wxRGN_OR:
 192             XUnionRegion(M_REGION, ((wxRegionRefData*)region.m_refData)->m_region,
 193                  M_REGION);
 194             break ;
 195         case wxRGN_XOR:
 196             // TODO
 197             break ;
 198         case wxRGN_DIFF:
 199             // TODO
 200             break ;
 201         case wxRGN_COPY: // Don't have to do this one
 202         default:
 203             // TODO
 204             break ;
 205     }
 206
 207   return FALSE;
 208 }
 209
 210 bool wxRegion::Combine(const wxRect& rect, wxRegionOp op)
 211 {
 212     return Combine(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight(), op);
 213 }
 214
 215 //-----------------------------------------------------------------------------
 216 //# Information on region
 217 //-----------------------------------------------------------------------------
 218
 219 // Outer bounds of region
 220 void wxRegion::GetBox(long& x, long& y, long&w, long &h) const
 221 {
 222     if (m_refData) {
 223         XRectangle rect;
 224         XClipBox(M_REGION, &rect);
 225         x = rect.x;
 226         y = rect.y;
 227         w = rect.width;
 228         h = rect.height;
 229     } else {
 230         x = y = w = h = 0;
 231     }
 232 }
 233
 234 wxRect wxRegion::GetBox() const
 235 {
 236     long x, y, w, h;
 237     GetBox(x, y, w, h);
 238     return wxRect(x, y, w, h);
 239 }
 240
 241 // Is region empty?
 242 bool wxRegion::Empty() const
 243 {
 244     return m_refData ? XEmptyRegion(M_REGION) : TRUE;
 245 }
 246
 247 //-----------------------------------------------------------------------------
 248 //# Tests
 249 //-----------------------------------------------------------------------------
 250
 251 // Does the region contain the point (x,y)?
 252 wxRegionContain wxRegion::Contains(long WXUNUSED(x), long WXUNUSED(y)) const
 253 {
 254     if (!m_refData)
 255         return wxOutRegion;
 256
 257     // TODO. Return wxInRegion if within region.
 258     if (0)
 259         return wxInRegion;
 260     return wxOutRegion;
 261 }
 262
 263 // Does the region contain the point pt?
 264 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 265 {
 266     if (!m_refData)
 267         return wxOutRegion;
 268
 269     return XPointInRegion(M_REGION, pt.x, pt.y) ? wxInRegion : wxOutRegion;
 270 }
 271
 272 // Does the region contain the rectangle (x, y, w, h)?
 273 wxRegionContain wxRegion::Contains(long x, long y, long w, long h) const
 274 {
 275     if (!m_refData)
 276         return wxOutRegion;
 277
 278     switch (XRectInRegion(M_REGION, x, y, w, h)) {
 279         case RectangleIn:    return wxInRegion;
 280         case RectanglePart: return wxPartRegion;
 281     }
 282     return wxOutRegion;
 283 }
 284
 285 // Does the region contain the rectangle rect
 286 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 287 {
 288     if (!m_refData)
 289         return wxOutRegion;
 290
 291     long x, y, w, h;
 292     x = rect.x;
 293     y = rect.y;
 294     w = rect.GetWidth();
 295     h = rect.GetHeight();
 296     return Contains(x, y, w, h);
 297 }
 298
 299 ///////////////////////////////////////////////////////////////////////////////
 300 //                                                                             //
 301 //                               wxRegionIterator                                 //
 302 //                                                                             //
 303 ///////////////////////////////////////////////////////////////////////////////
 304
 305 /*!
 306  * Initialize empty iterator
 307  */
 308 wxRegionIterator::wxRegionIterator() : m_current(0), m_numRects(0), m_rects(NULL)
 309 {
 310 }
 311
 312 wxRegionIterator::~wxRegionIterator()
 313 {
 314     if (m_rects)
 315         delete[] m_rects;
 316 }
 317
 318 /*!
 319  * Initialize iterator for region
 320  */
 321 wxRegionIterator::wxRegionIterator(const wxRegion& region)
 322 {
 323     m_rects = NULL;
 324
 325     Reset(region);
 326 }
 327
 328 /*!
 329  * Reset iterator for a new /e region.
 330  */
 331 void wxRegionIterator::Reset(const wxRegion& region)
 332 {
 333     m_current = 0;
 334     m_region = region;
 335
 336     if (m_rects)
 337         delete[] m_rects;
 338
 339     m_rects = NULL;
 340
 341     if (m_region.Empty())
 342         m_numRects = 0;
 343     else
 344     {
 345         // TODO create m_rects and fill with rectangles for this region
 346         m_numRects = 0;
 347     }
 348 }
 349
 350 /*!
 351  * Increment iterator. The rectangle returned is the one after the
 352  * incrementation.
 353  */
 354 void wxRegionIterator::operator ++ ()
 355 {
 356     if (m_current < m_numRects)
 357         ++m_current;
 358 }
 359
 360 /*!
 361  * Increment iterator. The rectangle returned is the one before the
 362  * incrementation.
 363  */
 364 void wxRegionIterator::operator ++ (int)
 365 {
 366     if (m_current < m_numRects)
 367         ++m_current;
 368 }
 369
 370 long wxRegionIterator::GetX() const
 371 {
 372     if (m_current < m_numRects)
 373         return m_rects[m_current].x;
 374     return 0;
 375 }
 376
 377 long wxRegionIterator::GetY() const
 378 {
 379     if (m_current < m_numRects)
 380         return m_rects[m_current].y;
 381     return 0;
 382 }
 383
 384 long wxRegionIterator::GetW() const
 385 {
 386     if (m_current < m_numRects)
 387         return m_rects[m_current].width ;
 388     return 0;
 389 }
 390
 391 long wxRegionIterator::GetH() const
 392 {
 393     if (m_current < m_numRects)
 394         return m_rects[m_current].height;
 395     return 0;
 396 }
 397