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 #ifdef __VMS__
  19 #pragma message disable nosimpint
  20 #endif
  21 #include <Xm/Xm.h>
  22 #ifdef __VMS__
  23 #pragma message enable nosimpint
  24 #endif
  25 // #include "wx/motif/private.h"
  26
  27     IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
  28     IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
  29
  30 // ----------------------------------------------------------------------------
  31 // list types
  32 // ----------------------------------------------------------------------------
  33
  34 #include "wx/listimpl.cpp"
  35
  36 WX_DEFINE_LIST(wxRectList);
  37
  38 //-----------------------------------------------------------------------------
  39 // wxRegionRefData implementation
  40 //-----------------------------------------------------------------------------
  41
  42 class WXDLLEXPORT wxRegionRefData : public wxGDIRefData {
  43 public:
  44     wxRegionRefData()
  45     {
  46         m_region = XCreateRegion();
  47         m_usingRects = FALSE;
  48         m_rects = (wxRect*) NULL;
  49         m_rectCount = 0;
  50     }
  51
  52     wxRegionRefData(const wxRegionRefData& data)
  53     {
  54         m_region = XCreateRegion();
  55         m_rects = (wxRect*) NULL;
  56         m_rectCount = 0;
  57         XUnionRegion(m_region, data.m_region, m_region);
  58
  59         SetRects(data.m_rectCount, data.m_rects);
  60     }
  61
  62     ~wxRegionRefData()
  63     {
  64         XDestroyRegion(m_region);
  65         DeleteRects();
  66     }
  67
  68     wxRect* GetRects() { return m_rects; };
  69     void SetRects(const wxRectList& rectList);
  70     void SetRects(int count, const wxRect* rects);
  71     bool UsingRects() const { return m_usingRects; }
  72     int GetRectCount() const { return m_rectCount; }
  73
  74     void DeleteRects();
  75
  76     Region      m_region;
  77     wxRect*     m_rects;
  78     int         m_rectCount;
  79     bool        m_usingRects;  // TRUE if we're using the above.
  80 };
  81
  82 void wxRegionRefData::SetRects(const wxRectList& rectList)
  83 {
  84     DeleteRects();
  85     m_usingRects = (rectList.Number() > 0);
  86     if (m_usingRects)
  87     {
  88       m_rectCount = rectList.Number();
  89       m_rects = new wxRect[m_rectCount];
  90     }
  91
  92     wxRectList::Node* node = rectList.GetFirst();
  93     int i = 0;
  94     while (node) {
  95         wxRect* rect = node->GetData();
  96         m_rects[i] = * rect;
  97         node = node->GetNext();
  98         i ++;
  99     }
 100 }
 101
 102 void wxRegionRefData::SetRects(int count, const wxRect* rects)
 103 {
 104     DeleteRects();
 105     m_usingRects = (count > 0);
 106     if (m_usingRects)
 107     {
 108       m_rectCount = count;
 109       m_rects = new wxRect[m_rectCount];
 110       int i;
 111       for (i = 0; i < m_rectCount; i++)
 112         m_rects[i] = rects[i];
 113     }
 114 }
 115
 116 void wxRegionRefData::DeleteRects()
 117 {
 118    if (m_rects)
 119    {
 120       delete[] m_rects;
 121       m_rects = (wxRect*) NULL;
 122    }
 123    m_rectCount = 0;
 124    m_usingRects = FALSE;
 125  }
 126
 127 #define M_REGION (((wxRegionRefData*)m_refData)->m_region)
 128
 129 //-----------------------------------------------------------------------------
 130 // wxRegion
 131 //-----------------------------------------------------------------------------
 132
 133 /*!
 134  * Create an empty region.
 135  */
 136 wxRegion::wxRegion()
 137 {
 138 }
 139
 140 wxRegion::wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 141 {
 142     m_refData = new wxRegionRefData;
 143
 144     XRectangle rect;
 145     rect.x        = x;
 146     rect.y        = y;
 147     rect.width    = w;
 148     rect.height = h;
 149     XUnionRectWithRegion(&rect, M_REGION, M_REGION);
 150 }
 151
 152 wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight)
 153 {
 154     m_refData = new wxRegionRefData;
 155
 156     XRectangle rect;
 157     rect.x        = topLeft.x;
 158     rect.y        = topLeft.y;
 159     rect.width    = bottomRight.x - topLeft.x;
 160     rect.height = bottomRight.y - topLeft.y;
 161     XUnionRectWithRegion(&rect, M_REGION, M_REGION);
 162 }
 163
 164 wxRegion::wxRegion(const wxRect& rect)
 165 {
 166     m_refData = new wxRegionRefData;
 167
 168     XRectangle rect1;
 169     rect1.x        = rect.x;
 170     rect1.y        = rect.y;
 171     rect1.width    = rect.width;
 172     rect1.height = rect.height;
 173     XUnionRectWithRegion(&rect1, M_REGION, M_REGION);
 174 }
 175
 176 /*!
 177  * Destroy the region.
 178  */
 179 wxRegion::~wxRegion()
 180 {
 181     // m_refData unrefed in ~wxObject
 182 }
 183
 184 // Get the internal region handle
 185 WXRegion wxRegion::GetXRegion() const
 186 {
 187     wxASSERT( m_refData !=NULL );
 188
 189     return (WXRegion) ((wxRegionRefData*)m_refData)->m_region;
 190 }
 191
 192 //-----------------------------------------------------------------------------
 193 //# Modify region
 194 //-----------------------------------------------------------------------------
 195
 196 //! Clear current region
 197 void wxRegion::Clear()
 198 {
 199     UnRef();
 200 }
 201
 202 //! Combine rectangle (x, y, w, h) with this.
 203 bool wxRegion::Combine(wxCoord x, wxCoord y, wxCoord width, wxCoord height, wxRegionOp op)
 204 {
 205     // Don't change shared data
 206     if (!m_refData) {
 207         m_refData = new wxRegionRefData();
 208     } else if (m_refData->GetRefCount() > 1) {
 209         wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 210         UnRef();
 211         m_refData = new wxRegionRefData(*ref);
 212     }
 213     // If ref count is 1, that means it's 'ours' anyway so no action.
 214
 215     Region rectRegion = XCreateRegion();
 216
 217     XRectangle rect;
 218     rect.x        = x;
 219     rect.y        = y;
 220     rect.width    = width;
 221     rect.height = height;
 222     XUnionRectWithRegion(&rect, rectRegion, rectRegion);
 223
 224     switch (op)
 225     {
 226         case wxRGN_AND:
 227             XIntersectRegion(M_REGION, rectRegion, M_REGION);
 228             break ;
 229         case wxRGN_OR:
 230             XUnionRegion(M_REGION, rectRegion, M_REGION);
 231             break ;
 232         case wxRGN_XOR:
 233             // TODO
 234             break ;
 235         case wxRGN_DIFF:
 236             // TODO
 237             break ;
 238         case wxRGN_COPY: // Don't have to do this one
 239         default:
 240             // TODO
 241             break ;
 242     }
 243
 244     return FALSE;
 245 }
 246
 247 //! Union /e region with this.
 248 bool wxRegion::Combine(const wxRegion& region, wxRegionOp op)
 249 {
 250     if (region.Empty())
 251         return FALSE;
 252
 253     // Don't change shared data
 254     if (!m_refData) {
 255         m_refData = new wxRegionRefData();
 256     } else    if (m_refData->GetRefCount() > 1) {
 257         wxRegionRefData* ref = (wxRegionRefData*)m_refData;
 258         UnRef();
 259         m_refData = new wxRegionRefData(*ref);
 260     }
 261
 262     switch (op)
 263     {
 264         case wxRGN_AND:
 265             XIntersectRegion(M_REGION, ((wxRegionRefData*)region.m_refData)->m_region,
 266                  M_REGION);
 267             break ;
 268         case wxRGN_OR:
 269             XUnionRegion(M_REGION, ((wxRegionRefData*)region.m_refData)->m_region,
 270                  M_REGION);
 271             break ;
 272         case wxRGN_XOR:
 273             // TODO
 274             break ;
 275         case wxRGN_DIFF:
 276             // TODO
 277             break ;
 278         case wxRGN_COPY: // Don't have to do this one
 279         default:
 280             // TODO
 281             break ;
 282     }
 283
 284   return FALSE;
 285 }
 286
 287 bool wxRegion::Combine(const wxRect& rect, wxRegionOp op)
 288 {
 289     return Combine(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight(), op);
 290 }
 291
 292 //-----------------------------------------------------------------------------
 293 //# Information on region
 294 //-----------------------------------------------------------------------------
 295
 296 // Outer bounds of region
 297 void wxRegion::GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const
 298 {
 299     if (m_refData) {
 300         XRectangle rect;
 301         XClipBox(M_REGION, &rect);
 302         x = rect.x;
 303         y = rect.y;
 304         w = rect.width;
 305         h = rect.height;
 306     } else {
 307         x = y = w = h = 0;
 308     }
 309 }
 310
 311 wxRect wxRegion::GetBox() const
 312 {
 313     wxCoord x, y, w, h;
 314     GetBox(x, y, w, h);
 315     return wxRect(x, y, w, h);
 316 }
 317
 318 // Is region empty?
 319 bool wxRegion::Empty() const
 320 {
 321     return m_refData ? XEmptyRegion(M_REGION) : TRUE;
 322 }
 323
 324 //-----------------------------------------------------------------------------
 325 //# Tests
 326 //-----------------------------------------------------------------------------
 327
 328 // Does the region contain the point (x,y)?
 329 wxRegionContain wxRegion::Contains(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y)) const
 330 {
 331     if (!m_refData)
 332         return wxOutRegion;
 333
 334     // TODO. Return wxInRegion if within region.
 335     if (0)
 336         return wxInRegion;
 337     return wxOutRegion;
 338 }
 339
 340 // Does the region contain the point pt?
 341 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 342 {
 343     if (!m_refData)
 344         return wxOutRegion;
 345
 346     return XPointInRegion(M_REGION, pt.x, pt.y) ? wxInRegion : wxOutRegion;
 347 }
 348
 349 // Does the region contain the rectangle (x, y, w, h)?
 350 wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const
 351 {
 352     if (!m_refData)
 353         return wxOutRegion;
 354
 355     switch (XRectInRegion(M_REGION, x, y, w, h)) {
 356         case RectangleIn:    return wxInRegion;
 357         case RectanglePart: return wxPartRegion;
 358     }
 359     return wxOutRegion;
 360 }
 361
 362 // Does the region contain the rectangle rect
 363 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 364 {
 365     if (!m_refData)
 366         return wxOutRegion;
 367
 368     wxCoord x, y, w, h;
 369     x = rect.x;
 370     y = rect.y;
 371     w = rect.GetWidth();
 372     h = rect.GetHeight();
 373     return Contains(x, y, w, h);
 374 }
 375
 376 bool wxRegion::UsingRects() const
 377 {
 378     return ((wxRegionRefData*)m_refData)->UsingRects();
 379 }
 380
 381 /*
 382 wxRectList& wxRegion::GetRectList()
 383 {
 384     return ((wxRegionRefData*)m_refData)->GetRectList();
 385 }
 386 */
 387
 388 wxRect* wxRegion::GetRects()
 389 {
 390     return ((wxRegionRefData*)m_refData)->GetRects();
 391 }
 392
 393 int wxRegion::GetRectCount() const
 394 {
 395     return ((wxRegionRefData*)m_refData)->GetRectCount();
 396 }
 397
 398 void wxRegion::SetRects(const wxRectList& rectList)
 399 {
 400     ((wxRegionRefData*)m_refData)->SetRects(rectList);
 401 }
 402
 403 void wxRegion::SetRects(int count, const wxRect* rects)
 404 {
 405     ((wxRegionRefData*)m_refData)->SetRects(count, rects);
 406 }
 407
 408 ///////////////////////////////////////////////////////////////////////////////
 409 //                                                                             //
 410 //                               wxRegionIterator                                 //
 411 //                                                                             //
 412 ///////////////////////////////////////////////////////////////////////////////
 413
 414 /*!
 415  * Initialize empty iterator
 416  */
 417 wxRegionIterator::wxRegionIterator() : m_current(0), m_numRects(0), m_rects(NULL)
 418 {
 419 }
 420
 421 wxRegionIterator::~wxRegionIterator()
 422 {
 423     if (m_rects)
 424         delete[] m_rects;
 425 }
 426
 427 /*!
 428  * Initialize iterator for region
 429  */
 430 wxRegionIterator::wxRegionIterator(const wxRegion& region)
 431 {
 432     m_rects = NULL;
 433
 434     Reset(region);
 435 }
 436
 437 /*!
 438  * Reset iterator for a new /e region.
 439  */
 440 void wxRegionIterator::Reset(const wxRegion& region)
 441 {
 442     m_current = 0;
 443     m_region = region;
 444
 445     if (m_rects)
 446         delete[] m_rects;
 447
 448     m_rects = NULL;
 449
 450     if (m_region.Empty())
 451         m_numRects = 0;
 452     else
 453     {
 454         // Create m_rects and fill with rectangles for this region.
 455         // Since we can't find the rectangles in a region, we cheat
 456         // by retrieving the rectangles explicitly set in wxPaintDC::wxPaintDC
 457         // (dcclient.cpp).
 458         if (m_region.UsingRects())
 459         {
 460             wxRect* rects = m_region.GetRects();
 461             int count = m_region.GetRectCount();
 462             m_numRects = count;
 463             m_rects = new wxRect[m_numRects];
 464
 465             for (size_t i = 0; i < m_numRects; i++)
 466                m_rects[i] = rects[i];
 467
 468             /*
 469             int i = 0;
 470             wxRectList::Node* node = rectList.GetFirst();
 471             while (node) {
 472                 wxRect* rect = node->GetData();
 473                 m_rects[i] = * rect;
 474                 node = node->GetNext();
 475                 i ++;
 476             }
 477             */
 478         }
 479         else
 480         {
 481             // For now, fudge by getting the whole bounding box.
 482             m_rects = new wxRect[1];
 483             m_numRects = 1;
 484             m_rects[0] = m_region.GetBox();
 485         }
 486     }
 487 }
 488
 489 /*!
 490  * Increment iterator. The rectangle returned is the one after the
 491  * incrementation.
 492  */
 493 void wxRegionIterator::operator ++ ()
 494 {
 495     if (m_current < m_numRects)
 496         ++m_current;
 497 }
 498
 499 /*!
 500  * Increment iterator. The rectangle returned is the one before the
 501  * incrementation.
 502  */
 503 void wxRegionIterator::operator ++ (int)
 504 {
 505     if (m_current < m_numRects)
 506         ++m_current;
 507 }
 508
 509 wxCoord wxRegionIterator::GetX() const
 510 {
 511     if (m_current < m_numRects)
 512         return m_rects[m_current].x;
 513     return 0;
 514 }
 515
 516 wxCoord wxRegionIterator::GetY() const
 517 {
 518     if (m_current < m_numRects)
 519         return m_rects[m_current].y;
 520     return 0;
 521 }
 522
 523 wxCoord wxRegionIterator::GetW() const
 524 {
 525     if (m_current < m_numRects)
 526         return m_rects[m_current].width ;
 527     return 0;
 528 }
 529
 530 wxCoord wxRegionIterator::GetH() const
 531 {
 532     if (m_current < m_numRects)
 533         return m_rects[m_current].height;
 534     return 0;
 535 }
 536