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
  20 //-----------------------------------------------------------------------------
  21 // wxRegion
  22 //-----------------------------------------------------------------------------
  23
  24 class wxRegionRefData: public wxObjectRefData
  25 {
  26 public:
  27     wxRegionRefData();
  28     ~wxRegionRefData();
  29
  30     GdkRegion  *m_region;
  31     wxList      m_rects;
  32 };
  33
  34 wxRegionRefData::wxRegionRefData()
  35 {
  36     m_region = (GdkRegion *) NULL;
  37 }
  38
  39 wxRegionRefData::~wxRegionRefData()
  40 {
  41     if (m_region) gdk_region_destroy( m_region );
  42
  43     wxNode *node = m_rects.First();
  44     while (node)
  45     {
  46         wxRect *r = (wxRect*)node->Data();
  47         delete r;
  48         node = node->Next();
  49     }
  50 }
  51
  52 //-----------------------------------------------------------------------------
  53
  54 #define M_REGIONDATA ((wxRegionRefData *)m_refData)
  55
  56 IMPLEMENT_DYNAMIC_CLASS(wxRegion,wxGDIObject);
  57
  58 wxRegion::wxRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
  59 {
  60     m_refData = new wxRegionRefData();
  61     GdkRegion *reg = gdk_region_new();
  62     GdkRectangle rect;
  63     rect.x = x;
  64     rect.y = y;
  65     rect.width = w;
  66     rect.height = h;
  67     M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
  68     gdk_region_destroy( reg );
  69     M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,w,h) );
  70 }
  71
  72 wxRegion::wxRegion( const wxPoint& topLeft, const wxPoint& bottomRight )
  73 {
  74     m_refData = new wxRegionRefData();
  75     GdkRegion *reg = gdk_region_new();
  76     GdkRectangle rect;
  77     rect.x = topLeft.x;
  78     rect.y = topLeft.y;
  79     rect.width = bottomRight.x - rect.x;
  80     rect.height = bottomRight.y - rect.y;
  81     M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
  82     gdk_region_destroy( reg );
  83     M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(topLeft,bottomRight) );
  84 }
  85
  86 wxRegion::wxRegion( const wxRect& rect )
  87 {
  88     m_refData = new wxRegionRefData();
  89     GdkRegion *reg = gdk_region_new();
  90     GdkRectangle g_rect;
  91     g_rect.x = rect.x;
  92     g_rect.y = rect.y;
  93     g_rect.width = rect.width;
  94     g_rect.height = rect.height;
  95     M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &g_rect );
  96     gdk_region_destroy( reg );
  97     M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(rect.x,rect.y,rect.width,rect.height) );
  98 }
  99
 100 wxRegion::wxRegion()
 101 {
 102 }
 103
 104 wxRegion::~wxRegion()
 105 {
 106 }
 107
 108 bool wxRegion::operator == ( const wxRegion& region )
 109 {
 110     return m_refData == region.m_refData;
 111 }
 112
 113 bool wxRegion::operator != ( const wxRegion& region )
 114 {
 115     return m_refData != region.m_refData;
 116 }
 117
 118 void wxRegion::Clear()
 119 {
 120     UnRef();
 121 }
 122
 123 bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 124 {
 125     GdkRectangle rect;
 126     rect.x = x;
 127     rect.y = y;
 128     rect.width = width;
 129     rect.height = height;
 130     if (!m_refData)
 131     {
 132         m_refData = new wxRegionRefData();
 133         GdkRegion *reg = gdk_region_new();
 134         M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect );
 135         gdk_region_destroy( reg );
 136     }
 137     else
 138     {
 139         GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect );
 140         gdk_region_destroy( M_REGIONDATA->m_region );
 141         M_REGIONDATA->m_region = reg;
 142     }
 143
 144     M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(x,y,width,height) );
 145
 146     return TRUE;
 147 }
 148
 149 bool wxRegion::Union( const wxRect& rect )
 150 {
 151     return Union( rect.x, rect.y, rect.width, rect.height );
 152 }
 153
 154 bool wxRegion::Union( const wxRegion& region )
 155 {
 156     if (region.IsNull())
 157         return FALSE;
 158
 159     if (!m_refData)
 160     {
 161         m_refData = new wxRegionRefData();
 162         M_REGIONDATA->m_region = gdk_region_new();
 163     }
 164
 165     GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() );
 166     gdk_region_destroy( M_REGIONDATA->m_region );
 167     M_REGIONDATA->m_region = reg;
 168
 169     wxNode *node = region.GetRectList()->First();
 170     while (node)
 171     {
 172         wxRect *r = (wxRect*)node->Data();
 173         M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
 174         node = node->Next();
 175     }
 176
 177     return TRUE;
 178 }
 179
 180 bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 181 {
 182     if (!m_refData)
 183     {
 184         m_refData = new wxRegionRefData();
 185         M_REGIONDATA->m_region = gdk_region_new();
 186     }
 187
 188     wxRegion reg( x, y, width, height );
 189     Intersect( reg );
 190     return TRUE;
 191 }
 192
 193 bool wxRegion::Intersect( const wxRect& rect )
 194 {
 195     if (!m_refData)
 196     {
 197         m_refData = new wxRegionRefData();
 198         M_REGIONDATA->m_region = gdk_region_new();
 199     }
 200
 201     wxRegion reg( rect );
 202     Intersect( reg );
 203     return TRUE;
 204 }
 205
 206 bool wxRegion::Intersect( const wxRegion& region )
 207 {
 208     if (region.IsNull())
 209         return FALSE;
 210
 211     if (!m_refData)
 212     {
 213         m_refData = new wxRegionRefData();
 214         M_REGIONDATA->m_region = gdk_region_new();
 215         return TRUE;
 216     }
 217
 218     GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() );
 219     gdk_region_destroy( M_REGIONDATA->m_region );
 220     M_REGIONDATA->m_region = reg;
 221     return TRUE;
 222 }
 223
 224 bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 225 {
 226     if (!m_refData)
 227     {
 228         m_refData = new wxRegionRefData();
 229         M_REGIONDATA->m_region = gdk_region_new();
 230     }
 231
 232     wxRegion reg( x, y, width, height );
 233     Subtract( reg );
 234     return TRUE;
 235 }
 236
 237 bool wxRegion::Subtract( const wxRect& rect )
 238 {
 239     if (!m_refData)
 240     {
 241         m_refData = new wxRegionRefData();
 242         M_REGIONDATA->m_region = gdk_region_new();
 243     }
 244
 245     wxRegion reg( rect );
 246     Subtract( reg );
 247     return TRUE;
 248 }
 249
 250 bool wxRegion::Subtract( const wxRegion& region )
 251 {
 252     if (region.IsNull())
 253         return FALSE;
 254
 255     if (!m_refData)
 256     {
 257         m_refData = new wxRegionRefData();
 258         M_REGIONDATA->m_region = gdk_region_new();
 259     }
 260
 261     GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() );
 262     gdk_region_destroy( M_REGIONDATA->m_region );
 263     M_REGIONDATA->m_region = reg;
 264     return TRUE;
 265 }
 266
 267 bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 268 {
 269     if (!m_refData)
 270     {
 271         m_refData = new wxRegionRefData();
 272         M_REGIONDATA->m_region = gdk_region_new();
 273     }
 274
 275     wxRegion reg( x, y, width, height );
 276     Xor( reg );
 277     return TRUE;
 278 }
 279
 280 bool wxRegion::Xor( const wxRect& rect )
 281 {
 282     if (!m_refData)
 283     {
 284         m_refData = new wxRegionRefData();
 285         M_REGIONDATA->m_region = gdk_region_new();
 286     }
 287
 288     wxRegion reg( rect );
 289     Xor( reg );
 290     return TRUE;
 291 }
 292
 293 bool wxRegion::Xor( const wxRegion& region )
 294 {
 295     if (region.IsNull())
 296         return FALSE;
 297
 298     if (!m_refData)
 299     {
 300         m_refData = new wxRegionRefData();
 301         M_REGIONDATA->m_region = gdk_region_new();
 302     }
 303
 304     GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() );
 305     gdk_region_destroy( M_REGIONDATA->m_region );
 306     M_REGIONDATA->m_region = reg;
 307
 308     wxNode *node = region.GetRectList()->First();
 309     while (node)
 310     {
 311         wxRect *r = (wxRect*)node->Data();
 312         M_REGIONDATA->m_rects.Append( (wxObject*) new wxRect(r->x,r->y,r->width,r->height) );
 313         node = node->Next();
 314     }
 315
 316     return TRUE;
 317 }
 318
 319 void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
 320 {
 321     x = 0;
 322     y = 0;
 323     w = -1;
 324     h = -1;
 325     if (!m_refData)
 326         return;
 327
 328     GdkRectangle rect;
 329     gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect );
 330     x = rect.x;
 331     y = rect.y;
 332     w = rect.width;
 333     h = rect.height;
 334 }
 335
 336 wxRect wxRegion::GetBox() const
 337 {
 338     wxCoord x = 0;
 339     wxCoord y = 0;
 340     wxCoord w = -1;
 341     wxCoord h = -1;
 342     GetBox( x, y, w, h );
 343     return wxRect( x, y, w, h );
 344 }
 345
 346 bool wxRegion::Empty() const
 347 {
 348     if (!m_refData)
 349         return TRUE;
 350
 351     return gdk_region_empty( M_REGIONDATA->m_region );
 352 }
 353
 354 wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
 355 {
 356     if (!m_refData)
 357         return wxOutRegion;
 358
 359     if (gdk_region_point_in( M_REGIONDATA->m_region, x, y ))
 360         return wxInRegion;
 361     else
 362         return wxOutRegion;
 363 }
 364
 365 wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
 366 {
 367     if (!m_refData)
 368         return wxOutRegion;
 369
 370     GdkRectangle rect;
 371     rect.x = x;
 372     rect.y = y;
 373     rect.width = w;
 374     rect.height = h;
 375     GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect );
 376     switch (res)
 377     {
 378         case GDK_OVERLAP_RECTANGLE_IN:   return wxInRegion;
 379         case GDK_OVERLAP_RECTANGLE_OUT:  return wxOutRegion;
 380         case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion;
 381     }
 382     return wxOutRegion;
 383 }
 384
 385 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 386 {
 387     return Contains( pt.x, pt.y );
 388 }
 389
 390 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 391 {
 392     return Contains( rect.x, rect.y, rect.width, rect.height );
 393 }
 394
 395 GdkRegion *wxRegion::GetRegion() const
 396 {
 397     if (!m_refData)
 398         return (GdkRegion*) NULL;
 399
 400     return M_REGIONDATA->m_region;
 401 }
 402
 403 wxList *wxRegion::GetRectList() const
 404 {
 405     if (!m_refData)
 406         return (wxList*) NULL;
 407
 408     return &(M_REGIONDATA->m_rects);
 409 }
 410
 411 //-----------------------------------------------------------------------------
 412 // wxRegion
 413 //-----------------------------------------------------------------------------
 414
 415 IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
 416
 417 wxRegionIterator::wxRegionIterator()
 418 {
 419     Reset();
 420 }
 421
 422 wxRegionIterator::wxRegionIterator( const wxRegion& region )
 423 {
 424     Reset(region);
 425 }
 426
 427 void wxRegionIterator::Reset( const wxRegion& region )
 428 {
 429     m_region = region;
 430     Reset();
 431 }
 432
 433 wxRegionIterator::operator bool () const
 434 {
 435     return m_current < (size_t)m_region.GetRectList()->Number();
 436 }
 437
 438 bool wxRegionIterator::HaveRects() const
 439 {
 440     return m_current < (size_t)m_region.GetRectList()->Number();
 441 }
 442
 443 void wxRegionIterator::operator ++ ()
 444 {
 445     if (m_current < (size_t)m_region.GetRectList()->Number()) ++m_current;
 446 }
 447
 448 void wxRegionIterator::operator ++ (int)
 449 {
 450     if (m_current < (size_t)m_region.GetRectList()->Number()) ++m_current;
 451 }
 452
 453 wxCoord wxRegionIterator::GetX() const
 454 {
 455     wxNode *node = m_region.GetRectList()->Nth( m_current );
 456     if (!node) return 0;
 457     wxRect *r = (wxRect*)node->Data();
 458     return r->x;
 459 }
 460
 461 wxCoord wxRegionIterator::GetY() const
 462 {
 463     wxNode *node = m_region.GetRectList()->Nth( m_current );
 464     if (!node) return 0;
 465     wxRect *r = (wxRect*)node->Data();
 466     return r->y;
 467 }
 468
 469 wxCoord wxRegionIterator::GetW() const
 470 {
 471     wxNode *node = m_region.GetRectList()->Nth( m_current );
 472     if (!node) return 0;
 473     wxRect *r = (wxRect*)node->Data();
 474     return r->width;
 475 }
 476
 477 wxCoord wxRegionIterator::GetH() const
 478 {
 479     wxNode *node = m_region.GetRectList()->Nth( m_current );
 480     if (!node) return 0;
 481     wxRect *r = (wxRect*)node->Data();
 482     return r->height;
 483 }
 484
 485