src/gtk/region.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gtk/region.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "region.h"
  12 #endif
  13
  14 #include "wx/region.h"
  15
  16 #include <gdk/gdk.h>
  17 #include <gtk/gtk.h>
  18
  19 #define OLDCODE 0
  20
  21 //-----------------------------------------------------------------------------
  22 // wxRegion
  23 //-----------------------------------------------------------------------------
  24
  25 class wxRegionRefData: public wxObjectRefData
  26 {
  27 public:
  28     wxRegionRefData();
  29     ~wxRegionRefData();
  30
  31     GdkRegion  *m_region;
  32 #if OLDCODE
  33     wxList      m_rects;
  34 #endif
  35 };
  36
  37 wxRegionRefData::wxRegionRefData()
  38 {
  39     m_region = (GdkRegion *) NULL;
  40 }
  41
  42 wxRegionRefData::~wxRegionRefData()
  43 {
  44     if (m_region) gdk_region_destroy( m_region );
  45
  46 #if OLDCODE
  47     wxNode *node = m_rects.First();
  48     while (node)
  49     {
  50         wxRect *r = (wxRect*)node->Data();
  51         delete r;
  52         node = node->Next();
  53     }
  54 #endif
  55 }
  56
  57 //-----------------------------------------------------------------------------
  58
  59 #define M_REGIONDATA ((wxRegionRefData *)m_refData)
  60
  61 IMPLEMENT_DYNAMIC_CLASS(wxRegion,wxGDIObject);
  62
  63 wxRegion::wxRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
  64 {
  65     m_refData = new wxRegionRefData();
  66     GdkRegion *reg = gdk_region_new();
  67     GdkRectangle rect;
  68     rect.x = x;
  69     rect.y = y;
  70     rect.width = w;
  71     rect.height = h;
  72 #ifdef __WXGTK20__
  73     gdk_region_union_with_rect( reg, &rect );
  74     M_REGIONDATA->m_region = reg;
  75 #else
  76     M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
  77     gdk_region_destroy( reg );
  78 #endif
  79 #if OLDCODE
  80     M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,w,h) );
  81 #endif
  82 }
  83
  84 wxRegion::wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
  85 {
  86     m_refData = new wxRegionRefData();
  87     GdkRegion *reg = gdk_region_new();
  88     GdkRectangle rect;
  89     rect.x = topLeft.x;
  90     rect.y = topLeft.y;
  91     rect.width = bottomRight.x - rect.x;
  92     rect.height = bottomRight.y - rect.y;
  93 #ifdef __WXGTK20__
  94     gdk_region_union_with_rect( reg, &rect );
  95     M_REGIONDATA->m_region = reg;
  96 #else
  97     M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
  98     gdk_region_destroy( reg );
  99 #endif
 100 #if OLDCODE
 101     M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(topLeft,bottomRight) );
 102 #endif
 103 }
 104
 105 wxRegion::wxRegion( const wxRect& rect )
 106 {
 107     m_refData = new wxRegionRefData();
 108     GdkRegion *reg = gdk_region_new();
 109     GdkRectangle g_rect;
 110     g_rect.x = rect.x;
 111     g_rect.y = rect.y;
 112     g_rect.width = rect.width;
 113     g_rect.height = rect.height;
 114 #ifdef __WXGTK20__
 115     gdk_region_union_with_rect( reg, &g_rect );
 116     M_REGIONDATA->m_region = reg;
 117 #else
 118     M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &g_rect );
 119     gdk_region_destroy( reg );
 120 #endif
 121 #if OLDCODE
 122     M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(rect.x,rect.y,rect.width,rect.height) );
 123 #endif
 124 }
 125
 126 wxRegion::wxRegion()
 127 {
 128 }
 129
 130 wxRegion::~wxRegion()
 131 {
 132 }
 133
 134 bool wxRegion::operator == ( const wxRegion& region )
 135 {
 136     return m_refData == region.m_refData;
 137 }
 138
 139 bool wxRegion::operator != ( const wxRegion& region )
 140 {
 141     return m_refData != region.m_refData;
 142 }
 143
 144 void wxRegion::Clear()
 145 {
 146     UnRef();
 147 }
 148
 149 bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 150 {
 151     GdkRectangle rect;
 152     rect.x = x;
 153     rect.y = y;
 154     rect.width = width;
 155     rect.height = height;
 156     if (!m_refData)
 157     {
 158         m_refData = new wxRegionRefData();
 159         GdkRegion *reg = gdk_region_new();
 160 #ifdef __WXGTK20__
 161         gdk_region_union_with_rect( reg, &rect );
 162         M_REGIONDATA->m_region = reg;
 163 #else
 164         M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
 165         gdk_region_destroy( reg );
 166 #endif
 167     }
 168     else
 169     {
 170 #ifdef __WXGTK20__
 171         gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
 172 #else
 173         GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
 174         gdk_region_destroy( M_REGIONDATA->m_region );
 175         M_REGIONDATA->m_region = reg;
 176 #endif
 177     }
 178
 179 #if OLDCODE
 180     M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,width,height) );
 181 #endif
 182
 183     return TRUE;
 184 }
 185
 186 bool wxRegion::Union( const wxRect& rect )
 187 {
 188     return Union( rect.x, rect.y, rect.width, rect.height );
 189 }
 190
 191 bool wxRegion::Union( const wxRegion& region )
 192 {
 193     if (region.IsNull())
 194         return FALSE;
 195
 196     if (!m_refData)
 197     {
 198         m_refData = new wxRegionRefData();
 199         M_REGIONDATA->m_region = gdk_region_new();
 200     }
 201
 202 #ifdef __WXGTK20__
 203     gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
 204 #else
 205     GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
 206     gdk_region_destroy( M_REGIONDATA->m_region );
 207     M_REGIONDATA->m_region = reg;
 208 #endif
 209
 210 #if OLDCODE
 211     wxNode *node = region.GetRectList()->First();
 212     while (node)
 213     {
 214         wxRect *r = (wxRect*)node->Data();
 215         M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
 216         node = node->Next();
 217     }
 218 #endif
 219
 220     return TRUE;
 221 }
 222
 223 bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 224 {
 225     if (!m_refData)
 226     {
 227         m_refData = new wxRegionRefData();
 228         M_REGIONDATA->m_region = gdk_region_new();
 229     }
 230
 231     wxRegion reg( x, y, width, height );
 232     Intersect( reg );
 233     return TRUE;
 234 }
 235
 236 bool wxRegion::Intersect( const wxRect& rect )
 237 {
 238     if (!m_refData)
 239     {
 240         m_refData = new wxRegionRefData();
 241         M_REGIONDATA->m_region = gdk_region_new();
 242     }
 243
 244     wxRegion reg( rect );
 245     Intersect( reg );
 246     return TRUE;
 247 }
 248
 249 bool wxRegion::Intersect( const wxRegion& region )
 250 {
 251     if (region.IsNull())
 252         return FALSE;
 253
 254     if (!m_refData)
 255     {
 256         m_refData = new wxRegionRefData();
 257         M_REGIONDATA->m_region = gdk_region_new();
 258         return TRUE;
 259     }
 260
 261 #ifdef __WXGTK20__
 262     gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
 263 #else
 264     GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
 265     gdk_region_destroy( M_REGIONDATA->m_region );
 266     M_REGIONDATA->m_region = reg;
 267 #endif
 268     return TRUE;
 269 }
 270
 271 bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 272 {
 273     if (!m_refData)
 274     {
 275         m_refData = new wxRegionRefData();
 276         M_REGIONDATA->m_region = gdk_region_new();
 277     }
 278
 279     wxRegion reg( x, y, width, height );
 280     Subtract( reg );
 281     return TRUE;
 282 }
 283
 284 bool wxRegion::Subtract( const wxRect& rect )
 285 {
 286     if (!m_refData)
 287     {
 288         m_refData = new wxRegionRefData();
 289         M_REGIONDATA->m_region = gdk_region_new();
 290     }
 291
 292     wxRegion reg( rect );
 293     Subtract( reg );
 294     return TRUE;
 295 }
 296
 297 bool wxRegion::Subtract( const wxRegion& region )
 298 {
 299     if (region.IsNull())
 300         return FALSE;
 301
 302     if (!m_refData)
 303     {
 304         m_refData = new wxRegionRefData();
 305         M_REGIONDATA->m_region = gdk_region_new();
 306     }
 307
 308 #ifdef __WXGTK20__
 309     gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
 310 #else
 311     GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
 312     gdk_region_destroy( M_REGIONDATA->m_region );
 313     M_REGIONDATA->m_region = reg;
 314 #endif
 315     return TRUE;
 316 }
 317
 318 bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 319 {
 320     if (!m_refData)
 321     {
 322         m_refData = new wxRegionRefData();
 323         M_REGIONDATA->m_region = gdk_region_new();
 324     }
 325
 326     wxRegion reg( x, y, width, height );
 327     Xor( reg );
 328     return TRUE;
 329 }
 330
 331 bool wxRegion::Xor( const wxRect& rect )
 332 {
 333     if (!m_refData)
 334     {
 335         m_refData = new wxRegionRefData();
 336         M_REGIONDATA->m_region = gdk_region_new();
 337     }
 338
 339     wxRegion reg( rect );
 340     Xor( reg );
 341     return TRUE;
 342 }
 343
 344 bool wxRegion::Xor( const wxRegion& region )
 345 {
 346     if (region.IsNull())
 347         return FALSE;
 348
 349     if (!m_refData)
 350     {
 351         m_refData = new wxRegionRefData();
 352         M_REGIONDATA->m_region = gdk_region_new();
 353     }
 354
 355 #ifdef __WXGTK20__
 356     gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
 357 #else
 358     GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
 359     gdk_region_destroy( M_REGIONDATA->m_region );
 360     M_REGIONDATA->m_region = reg;
 361 #endif
 362
 363 #if OLDCODE
 364     wxNode *node = region.GetRectList()->First();
 365     while (node)
 366     {
 367         wxRect *r = (wxRect*)node->Data();
 368         M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
 369         node = node->Next();
 370     }
 371 #endif
 372
 373     return TRUE;
 374 }
 375
 376 void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
 377 {
 378     x = 0;
 379     y = 0;
 380     w = -1;
 381     h = -1;
 382     if (!m_refData)
 383         return;
 384
 385     GdkRectangle rect;
 386     gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
 387     x = rect.x;
 388     y = rect.y;
 389     w = rect.width;
 390     h = rect.height;
 391 }
 392
 393 wxRect wxRegion::GetBox() const
 394 {
 395     wxCoord x = 0;
 396     wxCoord y = 0;
 397     wxCoord w = -1;
 398     wxCoord h = -1;
 399     GetBox( x, y, w, h );
 400     return wxRect( x, y, w, h );
 401 }
 402
 403 bool wxRegion::Empty() const
 404 {
 405     if (!m_refData)
 406         return TRUE;
 407
 408     return gdk_region_empty( M_REGIONDATA->m_region );
 409 }
 410
 411 wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
 412 {
 413     if (!m_refData)
 414         return wxOutRegion;
 415
 416     if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
 417         return wxInRegion;
 418     else
 419         return wxOutRegion;
 420 }
 421
 422 wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
 423 {
 424     if (!m_refData)
 425         return wxOutRegion;
 426
 427     GdkRectangle rect;
 428     rect.x = x;
 429     rect.y = y;
 430     rect.width = w;
 431     rect.height = h;
 432     GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
 433     switch (res)
 434     {
 435         case GDK_OVERLAP_RECTANGLE_IN:   return wxInRegion;
 436         case GDK_OVERLAP_RECTANGLE_OUT:  return wxOutRegion;
 437         case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
 438     }
 439     return wxOutRegion;
 440 }
 441
 442 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 443 {
 444     return Contains( pt.x, pt.y );
 445 }
 446
 447 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 448 {
 449     return Contains( rect.x, rect.y, rect.width, rect.height );
 450 }
 451
 452 GdkRegion *wxRegion::GetRegion() const
 453 {
 454     if (!m_refData)
 455         return (GdkRegion*) NULL;
 456
 457     return M_REGIONDATA->m_region;
 458 }
 459
 460 wxList *wxRegion::GetRectList() const
 461 {
 462 #if OLDCODE
 463     if (!m_refData)
 464         return (wxList*) NULL;
 465
 466     return &(M_REGIONDATA->m_rects);
 467 #else
 468     return (wxList*) NULL;
 469 #endif
 470 }
 471
 472 //-----------------------------------------------------------------------------
 473 // wxRegionIterator
 474 //-----------------------------------------------------------------------------
 475
 476 #if OLDCODE
 477
 478 IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
 479
 480 wxRegionIterator::wxRegionIterator()
 481 {
 482     Reset();
 483 }
 484
 485 wxRegionIterator::wxRegionIterator( const wxRegion& region )
 486 {
 487     Reset(region);
 488 }
 489
 490 void wxRegionIterator::Reset( const wxRegion& region )
 491 {
 492     m_region = region;
 493     Reset();
 494 }
 495
 496 wxRegionIterator::operator bool () const
 497 {
 498     return m_region.GetRectList() && m_current < (size_t)m_region.GetRectList()->Number();
 499 }
 500
 501 bool wxRegionIterator::HaveRects() const
 502 {
 503     return m_region.GetRectList() && m_current < (size_t)m_region.GetRectList()->Number();
 504 }
 505
 506 void wxRegionIterator::operator ++ ()
 507 {
 508     if (HaveRects()) ++m_current;
 509 }
 510
 511 void wxRegionIterator::operator ++ (int)
 512 {
 513     if (HaveRects()) ++m_current;
 514 }
 515
 516 wxCoord wxRegionIterator::GetX() const
 517 {
 518     wxNode *node = m_region.GetRectList()->Nth( m_current );
 519     if (!node) return 0;
 520     wxRect *r = (wxRect*)node->Data();
 521     return r->x;
 522 }
 523
 524 wxCoord wxRegionIterator::GetY() const
 525 {
 526     wxNode *node = m_region.GetRectList()->Nth( m_current );
 527     if (!node) return 0;
 528     wxRect *r = (wxRect*)node->Data();
 529     return r->y;
 530 }
 531
 532 wxCoord wxRegionIterator::GetW() const
 533 {
 534     wxNode *node = m_region.GetRectList()->Nth( m_current );
 535     if (!node) return 0;
 536     wxRect *r = (wxRect*)node->Data();
 537     return r->width;
 538 }
 539
 540 wxCoord wxRegionIterator::GetH() const
 541 {
 542     wxNode *node = m_region.GetRectList()->Nth( m_current );
 543     if (!node) return 0;
 544     wxRect *r = (wxRect*)node->Data();
 545     return r->height;
 546 }
 547
 548 #else
 549
 550 // the following structures must match the private structures
 551 // in X11 region code ( xc/lib/X11/region.h )
 552
 553 // this makes the Region type transparent
 554 // and we have access to the region rectangles
 555
 556 struct _XBox {
 557     short x1, x2, y1, y2;
 558 };
 559
 560 struct _XRegion {
 561     long   size , numRects;
 562     _XBox *rects, extents;
 563 };
 564
 565 class wxRIRefData: public wxObjectRefData
 566 {
 567 public:
 568
 569     wxRIRefData() : m_rects(0), m_numRects(0){}
 570    ~wxRIRefData();
 571
 572     wxRect *m_rects;
 573     size_t  m_numRects;
 574
 575     void CreateRects( const wxRegion& r );
 576 };
 577
 578 wxRIRefData::~wxRIRefData()
 579 {
 580     delete m_rects;
 581 }
 582
 583 #include <gdk/gdkprivate.h>
 584
 585 void wxRIRefData::CreateRects( const wxRegion& region )
 586 {
 587   if( m_rects )
 588     delete m_rects;
 589   m_rects   = 0;
 590   m_numRects= 0;
 591   GdkRegion *gdkregion= region.GetRegion();
 592   if( gdkregion ){
 593     Region r= ((GdkRegionPrivate *)gdkregion)->xregion;
 594     if( r ){
 595       m_numRects= r->numRects;
 596       if( m_numRects )
 597       {
 598         m_rects= new wxRect[m_numRects];
 599         for( size_t i=0; i<m_numRects; ++i )
 600         {
 601           _XBox &xr= r->rects[i];
 602           wxRect&wr= m_rects[i];
 603           wr.x     = xr.x1;
 604           wr.y     = xr.y1;
 605           wr.width = xr.x2-xr.x1;
 606           wr.height= xr.y2-xr.y1;
 607         }
 608       }
 609     }
 610   }
 611 }
 612
 613 IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
 614
 615 wxRegionIterator::wxRegionIterator()
 616 {
 617     m_refData = new wxRIRefData();
 618     Reset();
 619 }
 620
 621 wxRegionIterator::wxRegionIterator( const wxRegion& region )
 622 {
 623     m_refData = new wxRIRefData();
 624     Reset(region);
 625 }
 626
 627 void wxRegionIterator::Reset( const wxRegion& region )
 628 {
 629     m_region = region;
 630     ((wxRIRefData*)m_refData)->CreateRects(region);
 631     Reset();
 632 }
 633
 634 bool wxRegionIterator::HaveRects() const
 635 {
 636     return m_current < ((wxRIRefData*)m_refData)->m_numRects;
 637 }
 638
 639 wxRegionIterator::operator bool () const
 640 {
 641     return HaveRects();
 642 }
 643
 644 void wxRegionIterator::operator ++ ()
 645 {
 646     if (HaveRects()) ++m_current;
 647 }
 648
 649 void wxRegionIterator::operator ++ (int)
 650 {
 651     if (HaveRects()) ++m_current;
 652 }
 653
 654 wxCoord wxRegionIterator::GetX() const
 655 {
 656     if( !HaveRects() ) return 0;
 657     return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
 658 }
 659
 660 wxCoord wxRegionIterator::GetY() const
 661 {
 662     if( !HaveRects() ) return 0;
 663     return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
 664 }
 665
 666 wxCoord wxRegionIterator::GetW() const
 667 {
 668     if( !HaveRects() ) return -1;
 669     return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
 670 }
 671
 672 wxCoord wxRegionIterator::GetH() const
 673 {
 674     if( !HaveRects() ) return -1;
 675     return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
 676 }
 677
 678 #endif
 679