src/gtk/region.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gtk/region.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Modified:    VZ at 05.10.00: use AllocExclusive(), comparison fixed
   6 // Id:          $Id$
   7 // Copyright:   (c) 1998 Robert Roebling
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 #ifdef __GNUG__
  16     #pragma implementation "region.h"
  17 #endif
  18
  19 // ----------------------------------------------------------------------------
  20 // headers
  21 // ----------------------------------------------------------------------------
  22
  23 #include "wx/log.h"
  24
  25 #include "wx/region.h"
  26
  27 #include "wx/gtk/private.h"
  28
  29 // ----------------------------------------------------------------------------
  30 // wxRegionRefData: private class containing the information about the region
  31 // ----------------------------------------------------------------------------
  32
  33 class wxRegionRefData : public wxObjectRefData
  34 {
  35 public:
  36     wxRegionRefData()
  37     {
  38         m_region = NULL;
  39     }
  40
  41     wxRegionRefData(const wxRegionRefData& refData)
  42     {
  43 #ifdef __WXGTK20__
  44         m_region = gdk_region_copy(refData.m_region);
  45 #else
  46         m_region = gdk_region_new();
  47         GdkRegion *regCopy = gdk_regions_union(m_region, refData.m_region);
  48         gdk_region_destroy(m_region);
  49         m_region = regCopy;
  50 #endif
  51     }
  52
  53     ~wxRegionRefData()
  54     {
  55         if (m_region)
  56             gdk_region_destroy( m_region );
  57     }
  58
  59     GdkRegion  *m_region;
  60 };
  61
  62 // ----------------------------------------------------------------------------
  63 // macros
  64 // ----------------------------------------------------------------------------
  65
  66 #define M_REGIONDATA ((wxRegionRefData *)m_refData)
  67 #define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))
  68
  69 IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject);
  70 IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
  71
  72 // ----------------------------------------------------------------------------
  73 // wxRegion construction
  74 // ----------------------------------------------------------------------------
  75
  76 #define M_REGIONDATA ((wxRegionRefData *)m_refData)
  77
  78 void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
  79 {
  80     GdkRectangle rect;
  81     rect.x = x;
  82     rect.y = y;
  83     rect.width = w;
  84     rect.height = h;
  85
  86     m_refData = new wxRegionRefData();
  87
  88 #ifdef __WXGTK20__
  89     M_REGIONDATA->m_region = gdk_region_rectangle( &rect );
  90 #else
  91     GdkRegion *reg = gdk_region_new();
  92     M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
  93     gdk_region_destroy( reg );
  94 #endif
  95 }
  96
  97 wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
  98 {
  99     GdkPoint *gdkpoints = new GdkPoint[n];
 100     for ( size_t i = 0 ; i < n ; i++ )
 101     {
 102         gdkpoints[i].x = points[i].x;
 103         gdkpoints[i].y = points[i].y;
 104     }
 105
 106     m_refData = new wxRegionRefData();
 107
 108     GdkRegion* reg = gdk_region_polygon
 109                      (
 110                         gdkpoints,
 111                         n,
 112                         fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
 113                                                     : GDK_EVEN_ODD_RULE
 114                      );
 115
 116     M_REGIONDATA->m_region = reg;
 117
 118     delete [] gdkpoints;
 119 }
 120
 121 wxRegion::~wxRegion()
 122 {
 123     // m_refData unrefed in ~wxObject
 124 }
 125
 126 wxObjectRefData *wxRegion::CreateRefData() const
 127 {
 128     return new wxRegionRefData;
 129 }
 130
 131 wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const
 132 {
 133     return new wxRegionRefData(*(wxRegionRefData *)data);
 134 }
 135
 136 // ----------------------------------------------------------------------------
 137 // wxRegion comparison
 138 // ----------------------------------------------------------------------------
 139
 140 bool wxRegion::operator==( const wxRegion& region )
 141 {
 142     if (m_refData == region.m_refData) return TRUE;
 143
 144     if (!m_refData || !region.m_refData) return FALSE;
 145
 146     // compare the regions themselves, not the pointers to ref data!
 147     return gdk_region_equal(M_REGIONDATA->m_region,
 148                             M_REGIONDATA_OF(region)->m_region);
 149 }
 150
 151 // ----------------------------------------------------------------------------
 152 // wxRegion operations
 153 // ----------------------------------------------------------------------------
 154
 155 void wxRegion::Clear()
 156 {
 157     UnRef();
 158 }
 159
 160 bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 161 {
 162     GdkRectangle rect;
 163     rect.x = x;
 164     rect.y = y;
 165     rect.width = width;
 166     rect.height = height;
 167
 168     if (!m_refData)
 169     {
 170         m_refData = new wxRegionRefData();
 171 #ifdef __WXGTK20__
 172         M_REGIONDATA->m_region = gdk_region_rectangle( &rect );
 173 #else
 174         GdkRegion *reg = gdk_region_new();
 175         M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
 176         gdk_region_destroy( reg );
 177 #endif
 178     }
 179     else
 180     {
 181         AllocExclusive();
 182
 183 #ifdef __WXGTK20__
 184         gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
 185 #else
 186         GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
 187         gdk_region_destroy( M_REGIONDATA->m_region );
 188         M_REGIONDATA->m_region = reg;
 189 #endif
 190     }
 191
 192     return TRUE;
 193 }
 194
 195 bool wxRegion::Union( const wxRect& rect )
 196 {
 197     return Union( rect.x, rect.y, rect.width, rect.height );
 198 }
 199
 200 bool wxRegion::Union( const wxRegion& region )
 201 {
 202     if (region.IsNull())
 203         return FALSE;
 204
 205     if (!m_refData)
 206     {
 207         m_refData = new wxRegionRefData();
 208         M_REGIONDATA->m_region = gdk_region_new();
 209     }
 210     else
 211     {
 212         AllocExclusive();
 213     }
 214
 215 #ifdef __WXGTK20__
 216     gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() );
 217 #else
 218     GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
 219     gdk_region_destroy( M_REGIONDATA->m_region );
 220     M_REGIONDATA->m_region = reg;
 221 #endif
 222
 223     return TRUE;
 224 }
 225
 226 bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 227 {
 228     wxRegion reg( x, y, width, height );
 229
 230     return Intersect( reg );
 231 }
 232
 233 bool wxRegion::Intersect( const wxRect& rect )
 234 {
 235     wxRegion reg( rect );
 236
 237     return Intersect( reg );
 238 }
 239
 240 bool wxRegion::Intersect( const wxRegion& region )
 241 {
 242     if (region.IsNull())
 243         return FALSE;
 244
 245     if (!m_refData)
 246     {
 247         m_refData = new wxRegionRefData();
 248         M_REGIONDATA->m_region = gdk_region_new();
 249
 250         // leave here
 251         return TRUE;
 252     }
 253     else
 254     {
 255         AllocExclusive();
 256     }
 257
 258 #ifdef __WXGTK20__
 259     gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
 260 #else
 261     GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
 262     gdk_region_destroy( M_REGIONDATA->m_region );
 263     M_REGIONDATA->m_region = reg;
 264 #endif
 265
 266     return TRUE;
 267 }
 268
 269 bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 270 {
 271     wxRegion reg( x, y, width, height );
 272     return Subtract( reg );
 273 }
 274
 275 bool wxRegion::Subtract( const wxRect& rect )
 276 {
 277     wxRegion reg( rect );
 278     return Subtract( reg );
 279 }
 280
 281 bool wxRegion::Subtract( const wxRegion& region )
 282 {
 283     if (region.IsNull())
 284         return FALSE;
 285
 286     if (!m_refData)
 287     {
 288         m_refData = new wxRegionRefData();
 289         M_REGIONDATA->m_region = gdk_region_new();
 290     }
 291     else
 292     {
 293         AllocExclusive();
 294     }
 295
 296 #ifdef __WXGTK20__
 297     gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() );
 298 #else
 299     GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
 300     gdk_region_destroy( M_REGIONDATA->m_region );
 301     M_REGIONDATA->m_region = reg;
 302 #endif
 303
 304     return TRUE;
 305 }
 306
 307 bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 308 {
 309     wxRegion reg( x, y, width, height );
 310     return Xor( reg );
 311 }
 312
 313 bool wxRegion::Xor( const wxRect& rect )
 314 {
 315     wxRegion reg( rect );
 316     return Xor( reg );
 317 }
 318
 319 bool wxRegion::Xor( const wxRegion& region )
 320 {
 321     if (region.IsNull())
 322         return FALSE;
 323
 324     if (!m_refData)
 325     {
 326         m_refData = new wxRegionRefData();
 327         M_REGIONDATA->m_region = gdk_region_new();
 328     }
 329     else
 330     {
 331         AllocExclusive();
 332     }
 333
 334 #ifdef __WXGTK20__
 335     gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() );
 336 #else
 337     GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
 338     gdk_region_destroy( M_REGIONDATA->m_region );
 339     M_REGIONDATA->m_region = reg;
 340 #endif
 341
 342     return TRUE;
 343 }
 344
 345 // ----------------------------------------------------------------------------
 346 // wxRegion tests
 347 // ----------------------------------------------------------------------------
 348
 349 void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
 350 {
 351     if ( m_refData )
 352     {
 353         GdkRectangle rect;
 354         gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
 355         x = rect.x;
 356         y = rect.y;
 357         w = rect.width;
 358         h = rect.height;
 359     }
 360     else
 361     {
 362         x = 0;
 363         y = 0;
 364         w = -1;
 365         h = -1;
 366     }
 367 }
 368
 369 wxRect wxRegion::GetBox() const
 370 {
 371     wxCoord x, y, w, h;
 372     GetBox( x, y, w, h );
 373     return wxRect( x, y, w, h );
 374 }
 375
 376 bool wxRegion::Offset( wxCoord x, wxCoord y )
 377 {
 378     if (!m_refData)
 379         return FALSE;
 380
 381     AllocExclusive();
 382
 383     gdk_region_offset( M_REGIONDATA->m_region, x, y );
 384
 385     return TRUE;
 386 }
 387
 388 bool wxRegion::Empty() const
 389 {
 390     if (!m_refData)
 391         return TRUE;
 392
 393     return gdk_region_empty( M_REGIONDATA->m_region );
 394 }
 395
 396 wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
 397 {
 398     if (!m_refData)
 399         return wxOutRegion;
 400
 401     if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
 402         return wxInRegion;
 403     else
 404         return wxOutRegion;
 405 }
 406
 407 wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
 408 {
 409     if (!m_refData)
 410         return wxOutRegion;
 411
 412     GdkRectangle rect;
 413     rect.x = x;
 414     rect.y = y;
 415     rect.width = w;
 416     rect.height = h;
 417     GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
 418     switch (res)
 419     {
 420         case GDK_OVERLAP_RECTANGLE_IN:   return wxInRegion;
 421         case GDK_OVERLAP_RECTANGLE_OUT:  return wxOutRegion;
 422         case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
 423     }
 424     return wxOutRegion;
 425 }
 426
 427 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 428 {
 429     return Contains( pt.x, pt.y );
 430 }
 431
 432 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 433 {
 434     return Contains( rect.x, rect.y, rect.width, rect.height );
 435 }
 436
 437 GdkRegion *wxRegion::GetRegion() const
 438 {
 439     if (!m_refData)
 440         return (GdkRegion*) NULL;
 441
 442     return M_REGIONDATA->m_region;
 443 }
 444
 445 // ----------------------------------------------------------------------------
 446 // wxRegionIterator
 447 // ----------------------------------------------------------------------------
 448
 449 #ifndef __WXGTK20__
 450
 451 // the following structures must match the private structures
 452 // in X11 region code ( xc/lib/X11/region.h )
 453
 454 // this makes the Region type transparent
 455 // and we have access to the region rectangles
 456
 457 #include <gdk/gdkprivate.h>
 458
 459 struct _XBox {
 460     short x1, x2, y1, y2;
 461 };
 462
 463 struct _XRegion {
 464     long   size , numRects;
 465     _XBox *rects, extents;
 466 };
 467
 468 #endif
 469
 470 class wxRIRefData: public wxObjectRefData
 471 {
 472 public:
 473
 474     wxRIRefData() : m_rects(0), m_numRects(0){}
 475    ~wxRIRefData();
 476
 477     wxRect *m_rects;
 478     size_t  m_numRects;
 479
 480     void CreateRects( const wxRegion& r );
 481 };
 482
 483 wxRIRefData::~wxRIRefData()
 484 {
 485     delete m_rects;
 486 }
 487
 488 void wxRIRefData::CreateRects( const wxRegion& region )
 489 {
 490     if (m_rects)
 491       delete m_rects;
 492
 493     m_rects = 0;
 494     m_numRects = 0;
 495
 496     GdkRegion *gdkregion = region.GetRegion();
 497     if (!gdkregion) return;
 498
 499 #ifdef __WXGTK20__
 500     GdkRectangle *gdkrects = NULL;
 501     gint numRects = 0;
 502     gdk_region_get_rectangles( gdkregion, &gdkrects, &numRects );
 503
 504     m_numRects = numRects;
 505     if (numRects)
 506     {
 507         m_rects = new wxRect[m_numRects];
 508         for (size_t i=0; i < m_numRects; ++i)
 509         {
 510             GdkRectangle &gr = gdkrects[i];
 511             wxRect &wr = m_rects[i];
 512             wr.x = gr.x;
 513             wr.y = gr.y;
 514             wr.width = gr.width;
 515             wr.height = gr.height;
 516         }
 517     }
 518     g_free( gdkrects );
 519 #else // GTK+ 1.x
 520     Region r = ((GdkRegionPrivate *)gdkregion)->xregion;
 521     if (r)
 522     {
 523         m_numRects = r->numRects;
 524         if (m_numRects)
 525         {
 526             m_rects = new wxRect[m_numRects];
 527             for (size_t i=0; i < m_numRects; ++i)
 528             {
 529                 _XBox &xr = r->rects[i];
 530                 wxRect &wr = m_rects[i];
 531                 wr.x = xr.x1;
 532                 wr.y = xr.y1;
 533                 wr.width = xr.x2-xr.x1;
 534                 wr.height = xr.y2-xr.y1;
 535             }
 536         }
 537     }
 538 #endif // GTK+ 2.0/1.x
 539 }
 540
 541 wxRegionIterator::wxRegionIterator()
 542 {
 543     m_refData = new wxRIRefData();
 544     Reset();
 545 }
 546
 547 wxRegionIterator::wxRegionIterator( const wxRegion& region )
 548 {
 549     m_refData = new wxRIRefData();
 550     Reset(region);
 551 }
 552
 553 void wxRegionIterator::Reset( const wxRegion& region )
 554 {
 555     m_region = region;
 556     ((wxRIRefData*)m_refData)->CreateRects(region);
 557     Reset();
 558 }
 559
 560 bool wxRegionIterator::HaveRects() const
 561 {
 562     return m_current < ((wxRIRefData*)m_refData)->m_numRects;
 563 }
 564
 565 wxRegionIterator::operator bool () const
 566 {
 567     return HaveRects();
 568 }
 569
 570 void wxRegionIterator::operator ++ ()
 571 {
 572     if (HaveRects()) ++m_current;
 573 }
 574
 575 void wxRegionIterator::operator ++ (int)
 576 {
 577     if (HaveRects()) ++m_current;
 578 }
 579
 580 wxCoord wxRegionIterator::GetX() const
 581 {
 582     if( !HaveRects() ) return 0;
 583     return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
 584 }
 585
 586 wxCoord wxRegionIterator::GetY() const
 587 {
 588     if( !HaveRects() ) return 0;
 589     return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
 590 }
 591
 592 wxCoord wxRegionIterator::GetW() const
 593 {
 594     if( !HaveRects() ) return -1;
 595     return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
 596 }
 597
 598 wxCoord wxRegionIterator::GetH() const
 599 {
 600     if( !HaveRects() ) return -1;
 601     return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
 602 }
 603
 604 wxRect wxRegionIterator::GetRect() const
 605 {
 606     wxRect r;
 607     if( HaveRects() )
 608         r = ((wxRIRefData*)m_refData)->m_rects[m_current];
 609
 610     return r;
 611 }
 612