| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/gtk1/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/gtk1/private.h" |
| 29 | |
| 30 | |
| 31 | // ---------------------------------------------------------------------------- |
| 32 | // wxGdkRegion: creates a new region in ctor and destroys in dtor |
| 33 | // ---------------------------------------------------------------------------- |
| 34 | |
| 35 | class wxGdkRegion |
| 36 | { |
| 37 | public: |
| 38 | wxGdkRegion() { m_region = gdk_region_new(); } |
| 39 | ~wxGdkRegion() { gdk_region_destroy(m_region); } |
| 40 | |
| 41 | operator GdkRegion *() const { return m_region; } |
| 42 | |
| 43 | private: |
| 44 | GdkRegion *m_region; |
| 45 | }; |
| 46 | |
| 47 | |
| 48 | // ---------------------------------------------------------------------------- |
| 49 | // wxRegionRefData: private class containing the information about the region |
| 50 | // ---------------------------------------------------------------------------- |
| 51 | |
| 52 | class wxRegionRefData : public wxGDIRefData |
| 53 | { |
| 54 | public: |
| 55 | wxRegionRefData() |
| 56 | { |
| 57 | m_region = NULL; |
| 58 | } |
| 59 | |
| 60 | wxRegionRefData(const wxRegionRefData& refData) |
| 61 | : wxGDIRefData() |
| 62 | { |
| 63 | m_region = gdk_regions_union(wxGdkRegion(), refData.m_region); |
| 64 | } |
| 65 | |
| 66 | virtual ~wxRegionRefData() |
| 67 | { |
| 68 | if (m_region) |
| 69 | gdk_region_destroy( m_region ); |
| 70 | } |
| 71 | |
| 72 | GdkRegion *m_region; |
| 73 | }; |
| 74 | |
| 75 | // ---------------------------------------------------------------------------- |
| 76 | // macros |
| 77 | // ---------------------------------------------------------------------------- |
| 78 | |
| 79 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) |
| 80 | #define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData)) |
| 81 | |
| 82 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject) |
| 83 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject) |
| 84 | |
| 85 | // ---------------------------------------------------------------------------- |
| 86 | // wxRegion construction |
| 87 | // ---------------------------------------------------------------------------- |
| 88 | |
| 89 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) |
| 90 | |
| 91 | void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h) |
| 92 | { |
| 93 | GdkRectangle rect; |
| 94 | rect.x = x; |
| 95 | rect.y = y; |
| 96 | rect.width = w; |
| 97 | rect.height = h; |
| 98 | |
| 99 | m_refData = new wxRegionRefData(); |
| 100 | |
| 101 | M_REGIONDATA->m_region = gdk_region_union_with_rect( wxGdkRegion(), &rect ); |
| 102 | } |
| 103 | |
| 104 | wxRegion::wxRegion( GdkRegion *region ) |
| 105 | { |
| 106 | m_refData = new wxRegionRefData(); |
| 107 | M_REGIONDATA->m_region = gdk_regions_union(wxGdkRegion(), region); |
| 108 | } |
| 109 | |
| 110 | wxRegion::wxRegion( size_t n, const wxPoint *points, wxPolygonFillMode fillStyle ) |
| 111 | { |
| 112 | GdkPoint *gdkpoints = new GdkPoint[n]; |
| 113 | for ( size_t i = 0 ; i < n ; i++ ) |
| 114 | { |
| 115 | gdkpoints[i].x = points[i].x; |
| 116 | gdkpoints[i].y = points[i].y; |
| 117 | } |
| 118 | |
| 119 | m_refData = new wxRegionRefData(); |
| 120 | |
| 121 | GdkRegion* reg = gdk_region_polygon |
| 122 | ( |
| 123 | gdkpoints, |
| 124 | n, |
| 125 | fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE |
| 126 | : GDK_EVEN_ODD_RULE |
| 127 | ); |
| 128 | |
| 129 | M_REGIONDATA->m_region = reg; |
| 130 | |
| 131 | delete [] gdkpoints; |
| 132 | } |
| 133 | |
| 134 | wxRegion::~wxRegion() |
| 135 | { |
| 136 | // m_refData unrefed in ~wxObject |
| 137 | } |
| 138 | |
| 139 | wxGDIRefData *wxRegion::CreateGDIRefData() const |
| 140 | { |
| 141 | return new wxRegionRefData; |
| 142 | } |
| 143 | |
| 144 | wxGDIRefData *wxRegion::CloneGDIRefData(const wxGDIRefData *data) const |
| 145 | { |
| 146 | return new wxRegionRefData(*(wxRegionRefData *)data); |
| 147 | } |
| 148 | |
| 149 | // ---------------------------------------------------------------------------- |
| 150 | // wxRegion comparison |
| 151 | // ---------------------------------------------------------------------------- |
| 152 | |
| 153 | bool wxRegion::DoIsEqual(const wxRegion& region) const |
| 154 | { |
| 155 | return gdk_region_equal(M_REGIONDATA->m_region, |
| 156 | M_REGIONDATA_OF(region)->m_region); |
| 157 | } |
| 158 | |
| 159 | // ---------------------------------------------------------------------------- |
| 160 | // wxRegion operations |
| 161 | // ---------------------------------------------------------------------------- |
| 162 | |
| 163 | void wxRegion::Clear() |
| 164 | { |
| 165 | UnRef(); |
| 166 | } |
| 167 | |
| 168 | bool wxRegion::DoUnionWithRect(const wxRect& r) |
| 169 | { |
| 170 | // workaround for a strange GTK/X11 bug: taking union with an empty |
| 171 | // rectangle results in an empty region which is definitely not what we |
| 172 | // want |
| 173 | if ( r.IsEmpty() ) |
| 174 | return TRUE; |
| 175 | |
| 176 | if ( !m_refData ) |
| 177 | { |
| 178 | InitRect(r.x, r.y, r.width, r.height); |
| 179 | } |
| 180 | else |
| 181 | { |
| 182 | AllocExclusive(); |
| 183 | |
| 184 | GdkRectangle rect; |
| 185 | rect.x = r.x; |
| 186 | rect.y = r.y; |
| 187 | rect.width = r.width; |
| 188 | rect.height = r.height; |
| 189 | |
| 190 | GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect ); |
| 191 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 192 | M_REGIONDATA->m_region = reg; |
| 193 | } |
| 194 | |
| 195 | return TRUE; |
| 196 | } |
| 197 | |
| 198 | bool wxRegion::DoUnionWithRegion( const wxRegion& region ) |
| 199 | { |
| 200 | if (region.IsNull()) |
| 201 | return FALSE; |
| 202 | |
| 203 | if (!m_refData) |
| 204 | { |
| 205 | m_refData = new wxRegionRefData(); |
| 206 | M_REGIONDATA->m_region = gdk_region_new(); |
| 207 | } |
| 208 | else |
| 209 | { |
| 210 | AllocExclusive(); |
| 211 | } |
| 212 | |
| 213 | GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() ); |
| 214 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 215 | M_REGIONDATA->m_region = reg; |
| 216 | |
| 217 | return TRUE; |
| 218 | } |
| 219 | |
| 220 | bool wxRegion::DoIntersect( const wxRegion& region ) |
| 221 | { |
| 222 | wxCHECK_MSG( region.IsOk(), false, wxT("invalid region") ); |
| 223 | |
| 224 | if (!m_refData) |
| 225 | { |
| 226 | // intersecting with invalid region doesn't make sense |
| 227 | return FALSE; |
| 228 | } |
| 229 | |
| 230 | AllocExclusive(); |
| 231 | |
| 232 | GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() ); |
| 233 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 234 | M_REGIONDATA->m_region = reg; |
| 235 | |
| 236 | return TRUE; |
| 237 | } |
| 238 | |
| 239 | bool wxRegion::DoSubtract( const wxRegion& region ) |
| 240 | { |
| 241 | wxCHECK_MSG( region.IsOk(), false, wxT("invalid region") ); |
| 242 | |
| 243 | if (!m_refData) |
| 244 | { |
| 245 | // subtracting from an invalid region doesn't make sense |
| 246 | return FALSE; |
| 247 | } |
| 248 | |
| 249 | AllocExclusive(); |
| 250 | |
| 251 | GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() ); |
| 252 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 253 | M_REGIONDATA->m_region = reg; |
| 254 | |
| 255 | return TRUE; |
| 256 | } |
| 257 | |
| 258 | bool wxRegion::DoXor( const wxRegion& region ) |
| 259 | { |
| 260 | wxCHECK_MSG( region.IsOk(), false, wxT("invalid region") ); |
| 261 | |
| 262 | if (!m_refData) |
| 263 | { |
| 264 | return FALSE; |
| 265 | } |
| 266 | |
| 267 | AllocExclusive(); |
| 268 | |
| 269 | GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() ); |
| 270 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 271 | M_REGIONDATA->m_region = reg; |
| 272 | |
| 273 | return TRUE; |
| 274 | } |
| 275 | |
| 276 | bool wxRegion::DoOffset( wxCoord x, wxCoord y ) |
| 277 | { |
| 278 | if (!m_refData) |
| 279 | return FALSE; |
| 280 | |
| 281 | AllocExclusive(); |
| 282 | |
| 283 | gdk_region_offset( M_REGIONDATA->m_region, x, y ); |
| 284 | |
| 285 | return TRUE; |
| 286 | } |
| 287 | |
| 288 | // ---------------------------------------------------------------------------- |
| 289 | // wxRegion tests |
| 290 | // ---------------------------------------------------------------------------- |
| 291 | |
| 292 | bool wxRegion::DoGetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const |
| 293 | { |
| 294 | if ( m_refData ) |
| 295 | { |
| 296 | GdkRectangle rect; |
| 297 | gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect ); |
| 298 | x = rect.x; |
| 299 | y = rect.y; |
| 300 | w = rect.width; |
| 301 | h = rect.height; |
| 302 | |
| 303 | return true; |
| 304 | } |
| 305 | else |
| 306 | { |
| 307 | x = 0; |
| 308 | y = 0; |
| 309 | w = -1; |
| 310 | h = -1; |
| 311 | |
| 312 | return false; |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | bool wxRegion::IsEmpty() const |
| 317 | { |
| 318 | if (!m_refData) |
| 319 | return TRUE; |
| 320 | |
| 321 | return gdk_region_empty( M_REGIONDATA->m_region ); |
| 322 | } |
| 323 | |
| 324 | wxRegionContain wxRegion::DoContainsPoint( wxCoord x, wxCoord y ) const |
| 325 | { |
| 326 | if (!m_refData) |
| 327 | return wxOutRegion; |
| 328 | |
| 329 | if (gdk_region_point_in( M_REGIONDATA->m_region, x, y )) |
| 330 | return wxInRegion; |
| 331 | else |
| 332 | return wxOutRegion; |
| 333 | } |
| 334 | |
| 335 | wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const |
| 336 | { |
| 337 | if (!m_refData) |
| 338 | return wxOutRegion; |
| 339 | |
| 340 | GdkRectangle rect; |
| 341 | rect.x = r.x; |
| 342 | rect.y = r.y; |
| 343 | rect.width = r.width; |
| 344 | rect.height = r.height; |
| 345 | GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect ); |
| 346 | switch (res) |
| 347 | { |
| 348 | case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion; |
| 349 | case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion; |
| 350 | case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion; |
| 351 | } |
| 352 | return wxOutRegion; |
| 353 | } |
| 354 | |
| 355 | GdkRegion *wxRegion::GetRegion() const |
| 356 | { |
| 357 | if (!m_refData) |
| 358 | return NULL; |
| 359 | |
| 360 | return M_REGIONDATA->m_region; |
| 361 | } |
| 362 | |
| 363 | // ---------------------------------------------------------------------------- |
| 364 | // wxRegionIterator |
| 365 | // ---------------------------------------------------------------------------- |
| 366 | |
| 367 | // the following structures must match the private structures |
| 368 | // in X11 region code ( xc/lib/X11/region.h ) |
| 369 | |
| 370 | // this makes the Region type transparent |
| 371 | // and we have access to the region rectangles |
| 372 | |
| 373 | #include <gdk/gdkprivate.h> |
| 374 | |
| 375 | struct _XBox { |
| 376 | short x1, x2, y1, y2; |
| 377 | }; |
| 378 | |
| 379 | struct _XRegion { |
| 380 | long size , numRects; |
| 381 | _XBox *rects, extents; |
| 382 | }; |
| 383 | |
| 384 | |
| 385 | class wxRIRefData : public wxGDIRefData |
| 386 | { |
| 387 | public: |
| 388 | wxRIRefData() { Init(); } |
| 389 | virtual ~wxRIRefData(); |
| 390 | |
| 391 | void CreateRects( const wxRegion& r ); |
| 392 | |
| 393 | void Init() { m_rects = NULL; m_numRects = 0; } |
| 394 | |
| 395 | wxRect *m_rects; |
| 396 | size_t m_numRects; |
| 397 | }; |
| 398 | |
| 399 | wxRIRefData::~wxRIRefData() |
| 400 | { |
| 401 | delete [] m_rects; |
| 402 | } |
| 403 | |
| 404 | void wxRIRefData::CreateRects( const wxRegion& region ) |
| 405 | { |
| 406 | delete [] m_rects; |
| 407 | |
| 408 | Init(); |
| 409 | |
| 410 | GdkRegion *gdkregion = region.GetRegion(); |
| 411 | if (!gdkregion) |
| 412 | return; |
| 413 | |
| 414 | Region r = ((GdkRegionPrivate *)gdkregion)->xregion; |
| 415 | if (r) |
| 416 | { |
| 417 | m_numRects = r->numRects; |
| 418 | if (m_numRects) |
| 419 | { |
| 420 | m_rects = new wxRect[m_numRects]; |
| 421 | for (size_t i=0; i < m_numRects; ++i) |
| 422 | { |
| 423 | _XBox &xr = r->rects[i]; |
| 424 | wxRect &wr = m_rects[i]; |
| 425 | wr.x = xr.x1; |
| 426 | wr.y = xr.y1; |
| 427 | wr.width = xr.x2-xr.x1; |
| 428 | wr.height = xr.y2-xr.y1; |
| 429 | } |
| 430 | } |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | wxRegionIterator::wxRegionIterator() |
| 435 | { |
| 436 | m_refData = new wxRIRefData(); |
| 437 | Reset(); |
| 438 | } |
| 439 | |
| 440 | wxRegionIterator::wxRegionIterator( const wxRegion& region ) |
| 441 | { |
| 442 | m_refData = new wxRIRefData(); |
| 443 | Reset(region); |
| 444 | } |
| 445 | |
| 446 | void wxRegionIterator::Reset( const wxRegion& region ) |
| 447 | { |
| 448 | m_region = region; |
| 449 | ((wxRIRefData*)m_refData)->CreateRects(region); |
| 450 | Reset(); |
| 451 | } |
| 452 | |
| 453 | bool wxRegionIterator::HaveRects() const |
| 454 | { |
| 455 | return m_current < ((wxRIRefData*)m_refData)->m_numRects; |
| 456 | } |
| 457 | |
| 458 | wxRegionIterator& wxRegionIterator::operator ++ () |
| 459 | { |
| 460 | if (HaveRects()) |
| 461 | ++m_current; |
| 462 | |
| 463 | return *this; |
| 464 | } |
| 465 | |
| 466 | wxRegionIterator wxRegionIterator::operator ++ (int) |
| 467 | { |
| 468 | wxRegionIterator tmp = *this; |
| 469 | if (HaveRects()) |
| 470 | ++m_current; |
| 471 | |
| 472 | return tmp; |
| 473 | } |
| 474 | |
| 475 | wxCoord wxRegionIterator::GetX() const |
| 476 | { |
| 477 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 478 | |
| 479 | return ((wxRIRefData*)m_refData)->m_rects[m_current].x; |
| 480 | } |
| 481 | |
| 482 | wxCoord wxRegionIterator::GetY() const |
| 483 | { |
| 484 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 485 | |
| 486 | return ((wxRIRefData*)m_refData)->m_rects[m_current].y; |
| 487 | } |
| 488 | |
| 489 | wxCoord wxRegionIterator::GetW() const |
| 490 | { |
| 491 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 492 | |
| 493 | return ((wxRIRefData*)m_refData)->m_rects[m_current].width; |
| 494 | } |
| 495 | |
| 496 | wxCoord wxRegionIterator::GetH() const |
| 497 | { |
| 498 | wxCHECK_MSG( HaveRects(), 0, wxT("invalid wxRegionIterator") ); |
| 499 | |
| 500 | return ((wxRIRefData*)m_refData)->m_rects[m_current].height; |
| 501 | } |
| 502 | |
| 503 | wxRect wxRegionIterator::GetRect() const |
| 504 | { |
| 505 | wxRect r; |
| 506 | if( HaveRects() ) |
| 507 | r = ((wxRIRefData*)m_refData)->m_rects[m_current]; |
| 508 | |
| 509 | return r; |
| 510 | } |