src/os2/region.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // File:      region.cpp
   3 // Purpose:   Region class
   4 // Author:    David Webster
   5 // Modified by:
   6 // Created:   10/15/99
   7 // RCS-ID:    $Id$
   8 // Copyright: (c) Davdi Webster
   9 // Licence:   wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #include "wx/app.h"
  16 #include "wx/os2/region.h"
  17 #include "wx/gdicmn.h"
  18
  19 #include "wx/window.h"
  20 #include "wx/os2/private.h"
  21
  22     IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
  23     IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
  24
  25 //-----------------------------------------------------------------------------
  26 // wxRegionRefData implementation
  27 //-----------------------------------------------------------------------------
  28
  29 class WXDLLEXPORT wxRegionRefData : public wxGDIRefData {
  30 public:
  31     wxRegionRefData()
  32     {
  33         m_hRegion = 0;
  34         m_hPS     = 0;
  35     }
  36
  37     wxRegionRefData(const wxRegionRefData& rData)
  38     {
  39         RGNRECT                     vRgnData;
  40         PRECTL                      pRect = NULL;
  41
  42         vRgnData.ulDirection = RECTDIR_LFRT_TOPBOT;
  43         if (::GpiQueryRegionRects( rData.m_hPS      // Pres space
  44                                   ,rData.m_hRegion  // Handle of region to query
  45                                   ,NULL             // Return all RECTs
  46                                   ,&vRgnData        // Will contain number or RECTs in region
  47                                   ,NULL             // NULL to return number of RECTs
  48                                  ))
  49         {
  50             pRect = new RECTL[vRgnData.crcReturned];
  51             vRgnData.crc = vRgnData.crcReturned;
  52             vRgnData.ircStart = 1;
  53             if (::GpiQueryRegionRects( rData.m_hPS     // Pres space of source
  54                                       ,rData.m_hRegion // Handle of source region
  55                                       ,NULL            // Return all RECTs
  56                                       ,&vRgnData       // Operations set to return rects
  57                                       ,pRect           // Will contain the actual RECTS
  58                                      ))
  59             {
  60                 m_hRegion = ::GpiCreateRegion( rData.m_hPS
  61                                               ,vRgnData.crcReturned
  62                                               ,pRect
  63                                              );
  64                 m_hPS = rData.m_hPS;
  65             }
  66             delete [] pRect;
  67         }
  68     }
  69
  70     ~wxRegionRefData()
  71     {
  72         ::GpiDestroyRegion(m_hPS, m_hRegion);
  73     }
  74
  75     HRGN                            m_hRegion;
  76     HPS                             m_hPS;
  77 };
  78
  79 #define M_REGION (((wxRegionRefData*)m_refData)->m_hRegion)
  80 #define M_REGION_OF(rgn) (((wxRegionRefData*)(rgn.m_refData))->m_hRegion)
  81
  82 //-----------------------------------------------------------------------------
  83 // wxRegion
  84 //-----------------------------------------------------------------------------
  85
  86 /*!
  87  * Create an empty region.
  88  */
  89 wxRegion::wxRegion()
  90 {
  91     m_refData = new wxRegionRefData;
  92 } // end of wxRegion::wxRegion
  93
  94 wxRegion::wxRegion(
  95   WXHRGN                            hRegion,
  96   WXHDC                             hPS
  97 )
  98 {
  99     m_refData = new wxRegionRefData;
 100     M_REGION = (HRGN) hRegion;
 101     (((wxRegionRefData*)m_refData)->m_hPS) = hPS;
 102 } // end of wxRegion::wxRegion
 103
 104 wxRegion::wxRegion(
 105   wxCoord                           x
 106 , wxCoord                           y
 107 , wxCoord                           vWidth
 108 , wxCoord                           vHeight
 109 )
 110 {
 111     RECTL                           vRect;
 112     SIZEL                           vSize = {0, 0};
 113     DEVOPENSTRUC                    vDop = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
 114     HDC                             hDC = ::DevOpenDC( vHabmain
 115                                                       ,OD_MEMORY
 116                                                       ,"*"
 117                                                       ,5L
 118                                                       ,(PDEVOPENDATA)&vDop
 119                                                       ,NULLHANDLE
 120                                                      );
 121
 122
 123     vRect.xLeft   = x;
 124     vRect.xRight  = x + vWidth;
 125     vRect.yBottom = y;
 126     vRect.yTop    = y + vHeight;
 127
 128     m_refData     = new wxRegionRefData;
 129
 130     //
 131     // Need a PS to create a Region
 132     //
 133     ((wxRegionRefData*)m_refData)->m_hPS = ::GpiCreatePS( vHabmain
 134                                                          ,hDC
 135                                                          ,&vSize
 136                                                          ,PU_PELS | GPIT_MICRO | GPIA_ASSOC
 137                                                         );
 138     M_REGION      = ::GpiCreateRegion( ((wxRegionRefData*)m_refData)->m_hPS
 139                                       ,1
 140                                       ,&vRect
 141                                      );
 142 } // end of wxRegion::wxRegion
 143
 144 wxRegion::wxRegion(
 145   const wxPoint&                    rTopLeft
 146 , const wxPoint&                    rBottomRight
 147 )
 148 {
 149     RECTL                           vRect;
 150     SIZEL                           vSize = {0, 0};
 151     DEVOPENSTRUC                    vDop = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
 152     HDC                             hDC = ::DevOpenDC( vHabmain
 153                                                       ,OD_MEMORY
 154                                                       ,"*"
 155                                                       ,5L
 156                                                       ,(PDEVOPENDATA)&vDop
 157                                                       ,NULLHANDLE
 158                                                      );
 159
 160     vRect.xLeft   = rTopLeft.x;
 161     vRect.xRight  = rBottomRight.x;
 162     vRect.yBottom = rBottomRight.y;
 163     vRect.yTop    = rTopLeft.y;
 164
 165     m_refData     = new wxRegionRefData;
 166
 167     //
 168     // Need a PS to create a Region
 169     //
 170     ((wxRegionRefData*)m_refData)->m_hPS = ::GpiCreatePS( vHabmain
 171                                                          ,hDC
 172                                                          ,&vSize
 173                                                          ,PU_PELS | GPIT_MICRO | GPIA_ASSOC
 174                                                         );
 175     M_REGION      = ::GpiCreateRegion( ((wxRegionRefData*)m_refData)->m_hPS
 176                                       ,1
 177                                       ,&vRect
 178                                      );
 179 } // end of wxRegion::wxRegion
 180
 181 wxRegion::wxRegion(
 182   const wxRect&                     rRect
 183 )
 184 {
 185     RECTL                           vRect;
 186     SIZEL                           vSize = {0, 0};
 187     DEVOPENSTRUC                    vDop = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
 188     HDC                             hDC = ::DevOpenDC( vHabmain
 189                                                       ,OD_MEMORY
 190                                                       ,"*"
 191                                                       ,5L
 192                                                       ,(PDEVOPENDATA)&vDop
 193                                                       ,NULLHANDLE
 194                                                      );
 195
 196
 197     vRect.xLeft   = rRect.x;
 198     vRect.xRight  = rRect.x + rRect.width;
 199     vRect.yBottom = rRect.y;
 200     vRect.yTop    = rRect.y + rRect.height;
 201
 202     m_refData     = new wxRegionRefData;
 203
 204     //
 205     // Need a PS to create a Region
 206     //
 207     ((wxRegionRefData*)m_refData)->m_hPS = ::GpiCreatePS( vHabmain
 208                                                          ,hDC
 209                                                          ,&vSize
 210                                                          ,PU_PELS | GPIT_MICRO | GPIA_ASSOC
 211                                                         );
 212     M_REGION      = ::GpiCreateRegion( ((wxRegionRefData*)m_refData)->m_hPS
 213                                       ,1
 214                                       ,&vRect
 215                                      );
 216 } // end of wxRegion::wxRegion
 217
 218 //
 219 // Destroy the region.
 220 //
 221 wxRegion::~wxRegion()
 222 {
 223 } // end of wxRegion::~wxRegion
 224
 225 wxObjectRefData *wxRegion::CreateData() const
 226 {
 227     return new wxRegionRefData;
 228 }
 229
 230 wxObjectRefData *wxRegion::CloneData(const wxObjectRefData *data) const
 231 {
 232     return new wxRegionRefData(*(wxRegionRefData *)data);
 233 }
 234
 235 //-----------------------------------------------------------------------------
 236 //# Modify region
 237 //-----------------------------------------------------------------------------
 238
 239 bool wxRegion::Offset(
 240   wxCoord                           x
 241 , wxCoord                           y
 242 )
 243 {
 244     if ( !x && !y )
 245     {
 246         // nothing to do
 247         return TRUE;
 248     }
 249
 250     AllocExclusive();
 251
 252 #if 0
 253     if ( ::OffsetRgn(GetHrgn(), x, y) == ERROR )
 254     {
 255         wxLogLastError(_T("OffsetRgn"));
 256
 257         return FALSE;
 258     }
 259 #endif
 260     return TRUE;
 261 }
 262
 263 //
 264 // Clear current region
 265 //
 266 void wxRegion::Clear()
 267 {
 268     UnRef();
 269 } // end of wxRegion::Clear
 270
 271 //
 272 // Combine rectangle (x, y, w, h) with this.
 273 //
 274 bool wxRegion::Combine(
 275   wxCoord                           x
 276 , wxCoord                           y
 277 , wxCoord                           vWidth
 278 , wxCoord                           vHeight
 279 , wxRegionOp                        eOp
 280 )
 281 {
 282     return Combine(wxRegion(x, y, vWidth, vHeight), eOp);
 283 } // end of wxRegion::Combine
 284
 285 //
 286 // Union region with this.
 287 //
 288 bool wxRegion::Combine(
 289   const wxRegion&                   rRegion
 290 , wxRegionOp                        eOp
 291 )
 292 {
 293     //
 294     // We can't use the API functions if we don't have a valid region handle
 295     //
 296     if (!m_refData)
 297     {
 298         // combining with an empty/invalid region works differently depending
 299         // on the operation
 300         switch (eOp)
 301         {
 302             case wxRGN_COPY:
 303             case wxRGN_OR:
 304             case wxRGN_XOR:
 305                 *this = rRegion;
 306                 break;
 307
 308             default:
 309                 wxFAIL_MSG( _T("unknown region operation") );
 310                 // fall through
 311
 312             case wxRGN_AND:
 313             case wxRGN_DIFF:
 314                 // leave empty/invalid
 315                 return FALSE;
 316         }
 317     }
 318     else // we have a valid region
 319     {
 320
 321         LONG                        lMode = 0;
 322
 323         switch (eOp)
 324         {
 325             case wxRGN_AND:
 326                 lMode = CRGN_AND;
 327                 break;
 328
 329             case wxRGN_OR:
 330                 lMode = CRGN_OR;
 331                 break;
 332
 333             case wxRGN_XOR:
 334                 lMode = CRGN_XOR;
 335                 break;
 336
 337             case wxRGN_DIFF:
 338                 lMode = CRGN_DIFF;
 339                 break;
 340
 341             case wxRGN_COPY:
 342             default:
 343                 lMode = CRGN_COPY;
 344                 break;
 345         }
 346         return (::GpiCombineRegion( ((wxRegionRefData*)rRegion.m_refData)->m_hPS
 347                                    ,M_REGION
 348                                    ,M_REGION
 349                                    ,((wxRegionRefData*)rRegion.m_refData)->m_hRegion
 350                                    ,lMode
 351                                   ) != RGN_ERROR);
 352     }
 353     return TRUE;
 354 } // end of wxRegion::Combine
 355
 356 bool wxRegion::Combine(
 357   const wxRect&                     rRect
 358 , wxRegionOp                        eOp
 359 )
 360 {
 361     return Combine( rRect.GetLeft()
 362                    ,rRect.GetTop()
 363                    ,rRect.GetWidth()
 364                    ,rRect.GetHeight()
 365                    ,eOp
 366                   );
 367 } // end of wxRegion::Combine
 368
 369 //-----------------------------------------------------------------------------
 370 //# Information on region
 371 //-----------------------------------------------------------------------------
 372
 373 //
 374 // Outer bounds of region
 375 //
 376 void wxRegion::GetBox(
 377   wxCoord&                          x
 378 , wxCoord&                          y
 379 , wxCoord&                          vWidth
 380 , wxCoord&                          vHeight
 381 ) const
 382 {
 383     if (m_refData)
 384     {
 385         RECTL                       vRect;
 386         APIRET                      rc;
 387
 388         rc = ::GpiQueryRegionBox( ((wxRegionRefData*)m_refData)->m_hPS
 389                             ,M_REGION
 390                             ,&vRect
 391                            );
 392         x       = vRect.xLeft;
 393         y       = vRect.yBottom;
 394         vWidth  = vRect.xRight - vRect.xLeft;
 395         vHeight = vRect.yTop - vRect.yBottom;
 396     }
 397     else
 398     {
 399         x = y = vWidth = vHeight = 0L;
 400     }
 401 } // end of wxRegion::GetBox
 402
 403 wxRect wxRegion::GetBox() const
 404 {
 405     wxCoord x, y, w, h;
 406     GetBox(x, y, w, h);
 407     return wxRect(x, y, w, h);
 408 }
 409
 410 //
 411 // Is region empty?
 412 //
 413 bool wxRegion::Empty() const
 414 {
 415     wxCoord                         x;
 416     wxCoord                         y;
 417     wxCoord                         vWidth;
 418     wxCoord                         vHeight;
 419
 420     if (M_REGION == 0)
 421         return TRUE;
 422
 423     GetBox( x
 424            ,y
 425            ,vWidth
 426            ,vHeight
 427           );
 428     return ((vWidth == 0) && (vHeight == 0));
 429 } // end of wxRegion::Empty
 430
 431 //-----------------------------------------------------------------------------
 432 // Tests
 433 //-----------------------------------------------------------------------------
 434
 435 //
 436 // Does the region contain the point (x,y)?
 437 wxRegionContain wxRegion::Contains(
 438   wxCoord                           x
 439 , wxCoord                           y
 440 ) const
 441 {
 442     POINTL                          vPoint;
 443
 444     vPoint.x = x;
 445     vPoint.y = y;
 446
 447     if (!m_refData)
 448         return wxOutRegion;
 449
 450     LONG                            lInside = ::GpiPtInRegion( ((wxRegionRefData*)m_refData)->m_hPS
 451                                                               ,M_REGION
 452                                                               ,&vPoint
 453                                                              );
 454     if (lInside == PRGN_INSIDE)
 455         return wxInRegion;
 456     return wxOutRegion;
 457 } // end of wxRegion::Contains
 458
 459 //
 460 // Does the region contain the point pt?
 461 //
 462 wxRegionContain wxRegion::Contains(
 463   const wxPoint&                    rPoint
 464 ) const
 465 {
 466     POINTL                          vPoint = { rPoint.x, rPoint.y };
 467
 468     if (!m_refData)
 469         return wxOutRegion;
 470
 471     LONG                            lInside = ::GpiPtInRegion( ((wxRegionRefData*)m_refData)->m_hPS
 472                                                               ,M_REGION
 473                                                               ,&vPoint
 474                                                              );
 475     if (lInside == PRGN_INSIDE)
 476         return wxInRegion;
 477     else
 478         return wxOutRegion;
 479 } // end of wxRegion::Contains
 480
 481 //
 482 // Does the region contain the rectangle (x, y, w, h)?
 483 //
 484 wxRegionContain wxRegion::Contains(
 485   wxCoord                           x
 486 , wxCoord                           y
 487 , wxCoord                           vWidth
 488 , wxCoord                           vHeight
 489 ) const
 490 {
 491     RECTL                           vRect;
 492
 493     if (!m_refData)
 494         return wxOutRegion;
 495
 496     vRect.xLeft   = x;
 497     vRect.yTop    = y;
 498     vRect.xRight  = x + vWidth;
 499     vRect.yBottom = y + vHeight;
 500
 501     if (PRGN_INSIDE == ::GpiRectInRegion( ((wxRegionRefData*)m_refData)->m_hPS
 502                                          ,M_REGION
 503                                          ,&vRect
 504                                         ))
 505         return wxInRegion;
 506     else
 507         return wxOutRegion;
 508 } // end of wxRegion::Contains
 509
 510 //
 511 // Does the region contain the rectangle rect
 512 //
 513 wxRegionContain wxRegion::Contains(
 514   const wxRect&                     rRect
 515 ) const
 516 {
 517     if (!m_refData)
 518         return wxOutRegion;
 519
 520     wxCoord                         x;
 521     wxCoord                         y;
 522     wxCoord                         vWidth;
 523     wxCoord                         vHeight;
 524
 525     x       = rRect.x;
 526     y       = rRect.y;
 527     vWidth  = rRect.GetWidth();
 528     vHeight = rRect.GetHeight();
 529     return Contains( x
 530                     ,y
 531                     ,vWidth
 532                     ,vHeight
 533                    );
 534 } // end of wxRegion::Contains
 535
 536 //
 537 // Get internal region handle
 538 //
 539 WXHRGN wxRegion::GetHRGN() const
 540 {
 541     if (!m_refData)
 542         return (WXHRGN) 0;
 543     return (WXHRGN) M_REGION;
 544 }
 545
 546 //
 547 // Set a new PS, this means we have to recreate the old region in the new
 548 // PS
 549 //
 550 void wxRegion::SetPS(
 551   HPS                               hPS
 552 )
 553 {
 554     RGNRECT                     vRgnData;
 555     PRECTL                      pRect = NULL;
 556
 557     vRgnData.ulDirection = RECTDIR_LFRT_TOPBOT;
 558     if (::GpiQueryRegionRects( ((wxRegionRefData*)m_refData)->m_hPS
 559                               ,((wxRegionRefData*)m_refData)->m_hRegion
 560                               ,NULL
 561                               ,&vRgnData
 562                               ,NULL
 563                              ))
 564     {
 565         pRect = new RECTL[vRgnData.crcReturned];
 566         vRgnData.crc = vRgnData.crcReturned;
 567         vRgnData.ircStart = 1;
 568         if (::GpiQueryRegionRects( ((wxRegionRefData*)m_refData)->m_hPS
 569                                   ,((wxRegionRefData*)m_refData)->m_hRegion
 570                                   ,NULL
 571                                   ,&vRgnData
 572                                   ,pRect
 573                                  ))
 574         {
 575             //
 576             // First destroy the region out of the old PS
 577             // and then create it in the new and set the new to current
 578             //
 579             ::GpiDestroyRegion( ((wxRegionRefData*)m_refData)->m_hPS
 580                                ,M_REGION
 581                               );
 582             ((wxRegionRefData*)m_refData)->m_hRegion = ::GpiCreateRegion( hPS
 583                                                                          ,vRgnData.crcReturned
 584                                                                          ,pRect
 585                                                                         );
 586             ((wxRegionRefData*)m_refData)->m_hPS = hPS;
 587         }
 588         delete [] pRect;
 589     }
 590 } // end of wxRegion::SetPS
 591
 592 ///////////////////////////////////////////////////////////////////////////////
 593 //                                                                           //
 594 //                             wxRegionIterator                              //
 595 //                                                                           //
 596 ///////////////////////////////////////////////////////////////////////////////
 597
 598 //
 599 // Initialize empty iterator
 600 //
 601 wxRegionIterator::wxRegionIterator()
 602 : m_lCurrent(0)
 603 , m_lNumRects(0)
 604 , m_pRects(NULL)
 605 {
 606 } // end of wxRegionIterator::wxRegionIterator
 607
 608 wxRegionIterator::~wxRegionIterator()
 609 {
 610     if (m_pRects)
 611         delete[] m_pRects;
 612 } // end of wxRegionIterator::~wxRegionIterator
 613
 614 //
 615 // Initialize iterator for region
 616 //
 617 wxRegionIterator::wxRegionIterator(
 618   const wxRegion&                   rRegion
 619 )
 620 {
 621     m_pRects = NULL;
 622     Reset(rRegion);
 623 } // end of wxRegionIterator::wxRegionIterator
 624
 625 //
 626 // Reset iterator for a new /e region.
 627 //
 628 void wxRegionIterator::Reset(
 629   const wxRegion&                   rRegion
 630 )
 631 {
 632     m_lCurrent = 0;
 633     m_lNumRects = 0;
 634     m_vRegion  = rRegion;
 635
 636     if (m_pRects)
 637         delete[] m_pRects;
 638
 639     m_pRects = NULL;
 640
 641     if (m_vRegion.Empty())
 642         m_lNumRects = 0;
 643     else
 644     {
 645         RGNRECT                     vRgnData;
 646         PRECTL                      pRect;
 647
 648         vRgnData.ulDirection = RECTDIR_LFRT_TOPBOT;
 649         if (::GpiQueryRegionRects( ((wxRegionRefData*)rRegion.m_refData)->m_hPS     // Pres space
 650                                   ,((wxRegionRefData*)rRegion.m_refData)->m_hRegion // Handle of region to query
 651                                   ,NULL                                             // Return all RECTs
 652                                   ,&vRgnData                                        // Will contain number or RECTs in region
 653                                   ,NULL                                             // NULL to return number of RECTs
 654                                  ))
 655         {
 656             pRect = new RECTL[vRgnData.crcReturned];
 657             m_pRects = new wxRect[vRgnData.crcReturned];
 658             vRgnData.crc = vRgnData.crcReturned;
 659             m_lNumRects = vRgnData.crcReturned;
 660             vRgnData.ircStart = 1;
 661             if (::GpiQueryRegionRects( ((wxRegionRefData*)rRegion.m_refData)->m_hPS     // Pres space of source
 662                                       ,((wxRegionRefData*)rRegion.m_refData)->m_hRegion // Handle of source region
 663                                       ,NULL                                             // Return all RECTs
 664                                       ,&vRgnData                                        // Operations set to return rects
 665                                       ,pRect                                            // Will contain the actual RECTS
 666                                      ))
 667             {
 668 #if 0
 669                 M_REGION = ::GpiCreateRegion( ((wxRegionRefData*)rRegion.m_refData)->m_hPS
 670                                              ,vRgnData.crcReturned
 671                                              ,pRect
 672                                             );
 673 #endif
 674                 for( LONG i = 0; i < m_lNumRects; i++)
 675                 {
 676                     m_pRects[i].x      = pRect[i].xLeft;
 677                     m_pRects[i].width  = pRect[i].xRight - pRect[i].xLeft;
 678                     m_pRects[i].y      = pRect[i].yBottom;
 679                     m_pRects[i].height = pRect[i].yTop - pRect[i].yBottom;
 680                 }
 681 #if 0
 682                 ((wxRegionRefData*)m_refData)->m_hPS = ((wxRegionRefData*)rRegion.m_refData)->m_hPS;
 683 #endif
 684             }
 685         }
 686     }
 687 } // end of wxRegionIterator::Reset
 688
 689 //
 690 // Increment iterator. The rectangle returned is the one after the
 691 // incrementation.
 692 //
 693 void wxRegionIterator::operator++ ()
 694 {
 695     if (m_lCurrent < m_lNumRects)
 696         ++m_lCurrent;
 697 } // end of wxRegionIterator::operator ++
 698
 699 //
 700 // Increment iterator. The rectangle returned is the one before the
 701 // incrementation.
 702 //
 703 void wxRegionIterator::operator++ (int)
 704 {
 705     if (m_lCurrent < m_lNumRects)
 706         ++m_lCurrent;
 707 } // end of wxRegionIterator::operator++
 708
 709 wxCoord wxRegionIterator::GetX() const
 710 {
 711     if (m_lCurrent < m_lNumRects)
 712         return m_pRects[m_lCurrent].x;
 713     return 0L;
 714 } // end of wxRegionIterator::GetX
 715
 716 wxCoord wxRegionIterator::GetY() const
 717 {
 718     if (m_lCurrent < m_lNumRects)
 719         return m_pRects[m_lCurrent].y;
 720     return 0L;
 721 } // end of wxRegionIterator::GetY
 722
 723 wxCoord wxRegionIterator::GetW() const
 724 {
 725     if (m_lCurrent < m_lNumRects)
 726         return m_pRects[m_lCurrent].width ;
 727     return 0L;
 728 } // end of wxRegionIterator::GetW
 729
 730 wxCoord wxRegionIterator::GetH() const
 731 {
 732     if (m_lCurrent < m_lNumRects)
 733         return m_pRects[m_lCurrent].height;
 734     return 0L;
 735 } // end of wxRegionIterator::GetH
 736