| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/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 | // ---------------------------------------------------------------------------- |
| 16 | // headers |
| 17 | // ---------------------------------------------------------------------------- |
| 18 | |
| 19 | // For compilers that support precompilation, includes "wx.h". |
| 20 | #include "wx/wxprec.h" |
| 21 | |
| 22 | #include "wx/region.h" |
| 23 | |
| 24 | #ifndef WX_PRECOMP |
| 25 | #include "wx/log.h" |
| 26 | #endif |
| 27 | |
| 28 | #include "wx/gtk/private.h" |
| 29 | |
| 30 | |
| 31 | // ---------------------------------------------------------------------------- |
| 32 | // wxRegionRefData: private class containing the information about the region |
| 33 | // ---------------------------------------------------------------------------- |
| 34 | |
| 35 | class wxRegionRefData : public wxGDIRefData |
| 36 | { |
| 37 | public: |
| 38 | wxRegionRefData() |
| 39 | { |
| 40 | m_region = NULL; |
| 41 | } |
| 42 | |
| 43 | wxRegionRefData(const wxRegionRefData& refData) |
| 44 | : wxGDIRefData() |
| 45 | { |
| 46 | m_region = gdk_region_copy(refData.m_region); |
| 47 | } |
| 48 | |
| 49 | virtual ~wxRegionRefData() |
| 50 | { |
| 51 | if (m_region) |
| 52 | gdk_region_destroy( m_region ); |
| 53 | } |
| 54 | |
| 55 | GdkRegion *m_region; |
| 56 | }; |
| 57 | |
| 58 | // ---------------------------------------------------------------------------- |
| 59 | // macros |
| 60 | // ---------------------------------------------------------------------------- |
| 61 | |
| 62 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) |
| 63 | #define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData)) |
| 64 | |
| 65 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject) |
| 66 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject) |
| 67 | |
| 68 | // ---------------------------------------------------------------------------- |
| 69 | // wxRegion construction |
| 70 | // ---------------------------------------------------------------------------- |
| 71 | |
| 72 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) |
| 73 | |
| 74 | void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h) |
| 75 | { |
| 76 | GdkRectangle rect; |
| 77 | rect.x = x; |
| 78 | rect.y = y; |
| 79 | rect.width = w; |
| 80 | rect.height = h; |
| 81 | |
| 82 | m_refData = new wxRegionRefData(); |
| 83 | |
| 84 | M_REGIONDATA->m_region = gdk_region_rectangle( &rect ); |
| 85 | } |
| 86 | |
| 87 | wxRegion::wxRegion( GdkRegion *region ) |
| 88 | { |
| 89 | m_refData = new wxRegionRefData(); |
| 90 | M_REGIONDATA->m_region = gdk_region_copy( region ); |
| 91 | } |
| 92 | |
| 93 | wxRegion::wxRegion( size_t n, const wxPoint *points, |
| 94 | wxPolygonFillMode fillStyle ) |
| 95 | { |
| 96 | GdkPoint *gdkpoints = new GdkPoint[n]; |
| 97 | for ( size_t i = 0 ; i < n ; i++ ) |
| 98 | { |
| 99 | gdkpoints[i].x = points[i].x; |
| 100 | gdkpoints[i].y = points[i].y; |
| 101 | } |
| 102 | |
| 103 | m_refData = new wxRegionRefData(); |
| 104 | |
| 105 | GdkRegion* reg = gdk_region_polygon |
| 106 | ( |
| 107 | gdkpoints, |
| 108 | n, |
| 109 | fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE |
| 110 | : GDK_EVEN_ODD_RULE |
| 111 | ); |
| 112 | |
| 113 | M_REGIONDATA->m_region = reg; |
| 114 | |
| 115 | delete [] gdkpoints; |
| 116 | } |
| 117 | |
| 118 | wxRegion::~wxRegion() |
| 119 | { |
| 120 | // m_refData unrefed in ~wxObject |
| 121 | } |
| 122 | |
| 123 | wxGDIRefData *wxRegion::CreateGDIRefData() const |
| 124 | { |
| 125 | return new wxRegionRefData; |
| 126 | } |
| 127 | |
| 128 | wxGDIRefData *wxRegion::CloneGDIRefData(const wxGDIRefData *data) const |
| 129 | { |
| 130 | return new wxRegionRefData(*(wxRegionRefData *)data); |
| 131 | } |
| 132 | |
| 133 | // ---------------------------------------------------------------------------- |
| 134 | // wxRegion comparison |
| 135 | // ---------------------------------------------------------------------------- |
| 136 | |
| 137 | bool wxRegion::DoIsEqual(const wxRegion& region) const |
| 138 | { |
| 139 | return gdk_region_equal(M_REGIONDATA->m_region, |
| 140 | M_REGIONDATA_OF(region)->m_region); |
| 141 | } |
| 142 | |
| 143 | // ---------------------------------------------------------------------------- |
| 144 | // wxRegion operations |
| 145 | // ---------------------------------------------------------------------------- |
| 146 | |
| 147 | void wxRegion::Clear() |
| 148 | { |
| 149 | UnRef(); |
| 150 | } |
| 151 | |
| 152 | bool wxRegion::DoUnionWithRect(const wxRect& r) |
| 153 | { |
| 154 | // workaround for a strange GTK/X11 bug: taking union with an empty |
| 155 | // rectangle results in an empty region which is definitely not what we |
| 156 | // want |
| 157 | if ( r.IsEmpty() ) |
| 158 | return true; |
| 159 | |
| 160 | if ( !m_refData ) |
| 161 | { |
| 162 | InitRect(r.x, r.y, r.width, r.height); |
| 163 | } |
| 164 | else |
| 165 | { |
| 166 | AllocExclusive(); |
| 167 | |
| 168 | GdkRectangle rect; |
| 169 | rect.x = r.x; |
| 170 | rect.y = r.y; |
| 171 | rect.width = r.width; |
| 172 | rect.height = r.height; |
| 173 | |
| 174 | gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect ); |
| 175 | } |
| 176 | |
| 177 | return true; |
| 178 | } |
| 179 | |
| 180 | bool wxRegion::DoUnionWithRegion( const wxRegion& region ) |
| 181 | { |
| 182 | wxCHECK_MSG( region.IsOk(), false, wxT("invalid region") ); |
| 183 | |
| 184 | if (!m_refData) |
| 185 | { |
| 186 | m_refData = new wxRegionRefData(); |
| 187 | M_REGIONDATA->m_region = gdk_region_new(); |
| 188 | } |
| 189 | else |
| 190 | { |
| 191 | AllocExclusive(); |
| 192 | } |
| 193 | |
| 194 | gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() ); |
| 195 | |
| 196 | return true; |
| 197 | } |
| 198 | |
| 199 | bool wxRegion::DoIntersect( const wxRegion& region ) |
| 200 | { |
| 201 | wxCHECK_MSG( region.IsOk(), false, wxT("invalid region") ); |
| 202 | |
| 203 | if (!m_refData) |
| 204 | { |
| 205 | // intersecting with invalid region doesn't make sense |
| 206 | return false; |
| 207 | } |
| 208 | |
| 209 | AllocExclusive(); |
| 210 | |
| 211 | gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() ); |
| 212 | |
| 213 | return true; |
| 214 | } |
| 215 | |
| 216 | bool wxRegion::DoSubtract( const wxRegion& region ) |
| 217 | { |
| 218 | wxCHECK_MSG( region.IsOk(), false, wxT("invalid region") ); |
| 219 | |
| 220 | if (!m_refData) |
| 221 | { |
| 222 | // subtracting from an invalid region doesn't make sense |
| 223 | return false; |
| 224 | } |
| 225 | |
| 226 | AllocExclusive(); |
| 227 | |
| 228 | gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() ); |
| 229 | |
| 230 | return true; |
| 231 | } |
| 232 | |
| 233 | bool wxRegion::DoXor( const wxRegion& region ) |
| 234 | { |
| 235 | wxCHECK_MSG( region.IsOk(), false, wxT("invalid region") ); |
| 236 | |
| 237 | if (!m_refData) |
| 238 | { |
| 239 | return false; |
| 240 | } |
| 241 | |
| 242 | AllocExclusive(); |
| 243 | |
| 244 | gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() ); |
| 245 | |
| 246 | return true; |
| 247 | } |
| 248 | |
| 249 | bool wxRegion::DoOffset( wxCoord x, wxCoord y ) |
| 250 | { |
| 251 | if (!m_refData) |
| 252 | return false; |
| 253 | |
| 254 | AllocExclusive(); |
| 255 | |
| 256 | gdk_region_offset( M_REGIONDATA->m_region, x, y ); |
| 257 | |
| 258 | return true; |
| 259 | } |
| 260 | |
| 261 | // ---------------------------------------------------------------------------- |
| 262 | // wxRegion tests |
| 263 | // ---------------------------------------------------------------------------- |
| 264 | |
| 265 | bool wxRegion::DoGetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const |
| 266 | { |
| 267 | if ( m_refData ) |
| 268 | { |
| 269 | GdkRectangle rect; |
| 270 | gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect ); |
| 271 | x = rect.x; |
| 272 | y = rect.y; |
| 273 | w = rect.width; |
| 274 | h = rect.height; |
| 275 | |
| 276 | return true; |
| 277 | } |
| 278 | else |
| 279 | { |
| 280 | x = 0; |
| 281 | y = 0; |
| 282 | w = -1; |
| 283 | h = -1; |
| 284 | |
| 285 | return false; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | bool wxRegion::IsEmpty() const |
| 290 | { |
| 291 | if (!m_refData) |
| 292 | return true; |
| 293 | |
| 294 | return gdk_region_empty( M_REGIONDATA->m_region ); |
| 295 | } |
| 296 | |
| 297 | wxRegionContain wxRegion::DoContainsPoint( wxCoord x, wxCoord y ) const |
| 298 | { |
| 299 | if (!m_refData) |
| 300 | return wxOutRegion; |
| 301 | |
| 302 | if (gdk_region_point_in( M_REGIONDATA->m_region, x, y )) |
| 303 | return wxInRegion; |
| 304 | else |
| 305 | return wxOutRegion; |
| 306 | } |
| 307 | |
| 308 | wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const |
| 309 | { |
| 310 | if (!m_refData) |
| 311 | return wxOutRegion; |
| 312 | |
| 313 | GdkRectangle rect; |
| 314 | rect.x = r.x; |
| 315 | rect.y = r.y; |
| 316 | rect.width = r.width; |
| 317 | rect.height = r.height; |
| 318 | GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect ); |
| 319 | switch (res) |
| 320 | { |
| 321 | case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion; |
| 322 | case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion; |
| 323 | case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion; |
| 324 | } |
| 325 | return wxOutRegion; |
| 326 | } |
| 327 | |
| 328 | GdkRegion *wxRegion::GetRegion() const |
| 329 | { |
| 330 | if (!m_refData) |
| 331 | return NULL; |
| 332 | |
| 333 | return M_REGIONDATA->m_region; |
| 334 | } |
| 335 | |
| 336 | // ---------------------------------------------------------------------------- |
| 337 | // wxRegionIterator |
| 338 | // ---------------------------------------------------------------------------- |
| 339 | |
| 340 | wxRegionIterator::wxRegionIterator() |
| 341 | { |
| 342 | Init(); |
| 343 | Reset(); |
| 344 | } |
| 345 | |
| 346 | wxRegionIterator::wxRegionIterator( const wxRegion& region ) |
| 347 | { |
| 348 | Init(); |
| 349 | Reset(region); |
| 350 | } |
| 351 | |
| 352 | void wxRegionIterator::Init() |
| 353 | { |
| 354 | m_rects = NULL; |
| 355 | m_numRects = 0; |
| 356 | } |
| 357 | |
| 358 | wxRegionIterator::~wxRegionIterator() |
| 359 | { |
| 360 | wxDELETEA(m_rects); |
| 361 | } |
| 362 | |
| 363 | void wxRegionIterator::CreateRects( const wxRegion& region ) |
| 364 | { |
| 365 | wxDELETEA(m_rects); |
| 366 | m_numRects = 0; |
| 367 | |
| 368 | GdkRegion *gdkregion = region.GetRegion(); |
| 369 | if (!gdkregion) |
| 370 | return; |
| 371 | |
| 372 | GdkRectangle *gdkrects = NULL; |
| 373 | gint numRects = 0; |
| 374 | gdk_region_get_rectangles( gdkregion, &gdkrects, &numRects ); |
| 375 | |
| 376 | m_numRects = numRects; |
| 377 | if (numRects) |
| 378 | { |
| 379 | m_rects = new wxRect[m_numRects]; |
| 380 | for (size_t i=0; i < m_numRects; ++i) |
| 381 | { |
| 382 | GdkRectangle &gr = gdkrects[i]; |
| 383 | wxRect &wr = m_rects[i]; |
| 384 | wr.x = gr.x; |
| 385 | wr.y = gr.y; |
| 386 | wr.width = gr.width; |
| 387 | wr.height = gr.height; |
| 388 | } |
| 389 | } |
| 390 | g_free( gdkrects ); |
| 391 | } |
| 392 | |
| 393 | void wxRegionIterator::Reset( const wxRegion& region ) |
| 394 | { |
| 395 | m_region = region; |
| 396 | CreateRects(region); |
| 397 | Reset(); |
| 398 | } |
| 399 | |
| 400 | bool wxRegionIterator::HaveRects() const |
| 401 | { |
| 402 | return m_current < m_numRects; |
| 403 | } |
| 404 | |
| 405 | wxRegionIterator& wxRegionIterator::operator ++ () |
| 406 | { |
| 407 | if (HaveRects()) |
| 408 | ++m_current; |
| 409 | |
| 410 | return *this; |
| 411 | } |
| 412 | |
| 413 | wxRegionIterator wxRegionIterator::operator ++ (int) |
| 414 | { |
| 415 | wxRegionIterator tmp = *this; |
| 416 | |
| 417 | if (HaveRects()) |
| 418 | ++m_current; |
| 419 | |
| 420 | return tmp; |
| 421 | } |
| 422 | |
| 423 | wxCoord wxRegionIterator::GetX() const |
| 424 | { |
| 425 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 426 | |
| 427 | return m_rects[m_current].x; |
| 428 | } |
| 429 | |
| 430 | wxCoord wxRegionIterator::GetY() const |
| 431 | { |
| 432 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 433 | |
| 434 | return m_rects[m_current].y; |
| 435 | } |
| 436 | |
| 437 | wxCoord wxRegionIterator::GetW() const |
| 438 | { |
| 439 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 440 | |
| 441 | return m_rects[m_current].width; |
| 442 | } |
| 443 | |
| 444 | wxCoord wxRegionIterator::GetH() const |
| 445 | { |
| 446 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 447 | |
| 448 | return m_rects[m_current].height; |
| 449 | } |
| 450 | |
| 451 | wxRect wxRegionIterator::GetRect() const |
| 452 | { |
| 453 | wxRect r; |
| 454 | if( HaveRects() ) |
| 455 | r = m_rects[m_current]; |
| 456 | |
| 457 | return r; |
| 458 | } |
| 459 | |
| 460 | wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri) |
| 461 | { |
| 462 | wxDELETEA(m_rects); |
| 463 | |
| 464 | m_current = ri.m_current; |
| 465 | m_numRects = ri.m_numRects; |
| 466 | if ( m_numRects ) |
| 467 | { |
| 468 | m_rects = new wxRect[m_numRects]; |
| 469 | for ( unsigned int n = 0; n < m_numRects; n++ ) |
| 470 | m_rects[n] = ri.m_rects[n]; |
| 471 | } |
| 472 | else |
| 473 | { |
| 474 | m_rects = NULL; |
| 475 | } |
| 476 | |
| 477 | return *this; |
| 478 | } |