src/gtk/region.cpp

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