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