| 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/region.h" |
| 24 | |
| 25 | #include <gdk/gdk.h> |
| 26 | #include <gtk/gtk.h> |
| 27 | |
| 28 | #include "wx/log.h" |
| 29 | |
| 30 | // ---------------------------------------------------------------------------- |
| 31 | // wxRegionRefData: private class containing the information about the region |
| 32 | // ---------------------------------------------------------------------------- |
| 33 | |
| 34 | class wxRegionRefData : public wxObjectRefData |
| 35 | { |
| 36 | public: |
| 37 | wxRegionRefData() |
| 38 | { |
| 39 | m_region = NULL; |
| 40 | } |
| 41 | |
| 42 | wxRegionRefData(const wxRegionRefData& refData) |
| 43 | { |
| 44 | #ifdef __WXGTK20__ |
| 45 | m_region = gdk_region_copy(refData.m_region); |
| 46 | #else |
| 47 | m_region = gdk_region_new(); |
| 48 | GdkRegion *regCopy = gdk_regions_union(m_region, refData.m_region); |
| 49 | gdk_region_destroy(m_region); |
| 50 | m_region = regCopy; |
| 51 | #endif |
| 52 | } |
| 53 | |
| 54 | ~wxRegionRefData() |
| 55 | { |
| 56 | if (m_region) |
| 57 | gdk_region_destroy( m_region ); |
| 58 | } |
| 59 | |
| 60 | GdkRegion *m_region; |
| 61 | }; |
| 62 | |
| 63 | // ---------------------------------------------------------------------------- |
| 64 | // macros |
| 65 | // ---------------------------------------------------------------------------- |
| 66 | |
| 67 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) |
| 68 | #define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData)) |
| 69 | |
| 70 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject); |
| 71 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject); |
| 72 | |
| 73 | // ---------------------------------------------------------------------------- |
| 74 | // wxRegion construction |
| 75 | // ---------------------------------------------------------------------------- |
| 76 | |
| 77 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) |
| 78 | |
| 79 | void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h) |
| 80 | { |
| 81 | GdkRectangle rect; |
| 82 | rect.x = x; |
| 83 | rect.y = y; |
| 84 | rect.width = w; |
| 85 | rect.height = h; |
| 86 | |
| 87 | m_refData = new wxRegionRefData(); |
| 88 | |
| 89 | #ifdef __WXGTK20__ |
| 90 | M_REGIONDATA->m_region = gdk_region_rectangle( rect ); |
| 91 | #else |
| 92 | GdkRegion *reg = gdk_region_new(); |
| 93 | M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect ); |
| 94 | gdk_region_destroy( reg ); |
| 95 | #endif |
| 96 | } |
| 97 | |
| 98 | wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle ) |
| 99 | { |
| 100 | GdkPoint *gdkpoints = new GdkPoint[n]; |
| 101 | for ( size_t i = 0 ; i < n ; i++ ) |
| 102 | { |
| 103 | gdkpoints[i].x = points[i].x; |
| 104 | gdkpoints[i].y = points[i].y; |
| 105 | } |
| 106 | |
| 107 | m_refData = new wxRegionRefData(); |
| 108 | |
| 109 | GdkRegion* reg = gdk_region_polygon |
| 110 | ( |
| 111 | gdkpoints, |
| 112 | n, |
| 113 | fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE |
| 114 | : GDK_EVEN_ODD_RULE |
| 115 | ); |
| 116 | |
| 117 | M_REGIONDATA->m_region = reg; |
| 118 | |
| 119 | delete [] gdkpoints; |
| 120 | } |
| 121 | |
| 122 | wxRegion::~wxRegion() |
| 123 | { |
| 124 | // m_refData unrefed in ~wxObject |
| 125 | } |
| 126 | |
| 127 | wxObjectRefData *wxRegion::CreateRefData() const |
| 128 | { |
| 129 | return new wxRegionRefData; |
| 130 | } |
| 131 | |
| 132 | wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const |
| 133 | { |
| 134 | return new wxRegionRefData(*(wxRegionRefData *)data); |
| 135 | } |
| 136 | |
| 137 | // ---------------------------------------------------------------------------- |
| 138 | // wxRegion comparison |
| 139 | // ---------------------------------------------------------------------------- |
| 140 | |
| 141 | bool wxRegion::operator==( const wxRegion& region ) |
| 142 | { |
| 143 | if (m_refData == region.m_refData) return TRUE; |
| 144 | |
| 145 | if (!m_refData || !region.m_refData) return FALSE; |
| 146 | |
| 147 | // compare the regions themselves, not the pointers to ref data! |
| 148 | return gdk_region_equal(M_REGIONDATA->m_region, |
| 149 | M_REGIONDATA_OF(region)->m_region); |
| 150 | } |
| 151 | |
| 152 | // ---------------------------------------------------------------------------- |
| 153 | // wxRegion operations |
| 154 | // ---------------------------------------------------------------------------- |
| 155 | |
| 156 | void wxRegion::Clear() |
| 157 | { |
| 158 | UnRef(); |
| 159 | } |
| 160 | |
| 161 | bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) |
| 162 | { |
| 163 | GdkRectangle rect; |
| 164 | rect.x = x; |
| 165 | rect.y = y; |
| 166 | rect.width = width; |
| 167 | rect.height = height; |
| 168 | |
| 169 | if (!m_refData) |
| 170 | { |
| 171 | m_refData = new wxRegionRefData(); |
| 172 | #ifdef __WXGTK20__ |
| 173 | M_REGIONDATA->m_region = gdk_region_rectangle( rect ); |
| 174 | #else |
| 175 | GdkRegion *reg = gdk_region_new(); |
| 176 | M_REGIONDATA->m_region = gdk_region_union_with_rect( reg, &rect ); |
| 177 | gdk_region_destroy( reg ); |
| 178 | #endif |
| 179 | } |
| 180 | else |
| 181 | { |
| 182 | AllocExclusive(); |
| 183 | |
| 184 | #ifdef __WXGTK20__ |
| 185 | gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect ); |
| 186 | #else |
| 187 | GdkRegion *reg = gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect ); |
| 188 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 189 | M_REGIONDATA->m_region = reg; |
| 190 | #endif |
| 191 | } |
| 192 | |
| 193 | return TRUE; |
| 194 | } |
| 195 | |
| 196 | bool wxRegion::Union( const wxRect& rect ) |
| 197 | { |
| 198 | return Union( rect.x, rect.y, rect.width, rect.height ); |
| 199 | } |
| 200 | |
| 201 | bool wxRegion::Union( const wxRegion& region ) |
| 202 | { |
| 203 | if (region.IsNull()) |
| 204 | return FALSE; |
| 205 | |
| 206 | if (!m_refData) |
| 207 | { |
| 208 | m_refData = new wxRegionRefData(); |
| 209 | M_REGIONDATA->m_region = gdk_region_new(); |
| 210 | } |
| 211 | else |
| 212 | { |
| 213 | AllocExclusive(); |
| 214 | } |
| 215 | |
| 216 | #ifdef __WXGTK20__ |
| 217 | gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() ); |
| 218 | #else |
| 219 | GdkRegion *reg = gdk_regions_union( M_REGIONDATA->m_region, region.GetRegion() ); |
| 220 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 221 | M_REGIONDATA->m_region = reg; |
| 222 | #endif |
| 223 | |
| 224 | return TRUE; |
| 225 | } |
| 226 | |
| 227 | bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) |
| 228 | { |
| 229 | wxRegion reg( x, y, width, height ); |
| 230 | |
| 231 | return Intersect( reg ); |
| 232 | } |
| 233 | |
| 234 | bool wxRegion::Intersect( const wxRect& rect ) |
| 235 | { |
| 236 | wxRegion reg( rect ); |
| 237 | |
| 238 | return Intersect( reg ); |
| 239 | } |
| 240 | |
| 241 | bool wxRegion::Intersect( const wxRegion& region ) |
| 242 | { |
| 243 | if (region.IsNull()) |
| 244 | return FALSE; |
| 245 | |
| 246 | if (!m_refData) |
| 247 | { |
| 248 | m_refData = new wxRegionRefData(); |
| 249 | M_REGIONDATA->m_region = gdk_region_new(); |
| 250 | |
| 251 | // leave here |
| 252 | return TRUE; |
| 253 | } |
| 254 | else |
| 255 | { |
| 256 | AllocExclusive(); |
| 257 | } |
| 258 | |
| 259 | #ifdef __WXGTK20__ |
| 260 | gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() ); |
| 261 | #else |
| 262 | GdkRegion *reg = gdk_regions_intersect( M_REGIONDATA->m_region, region.GetRegion() ); |
| 263 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 264 | M_REGIONDATA->m_region = reg; |
| 265 | #endif |
| 266 | |
| 267 | return TRUE; |
| 268 | } |
| 269 | |
| 270 | bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) |
| 271 | { |
| 272 | wxRegion reg( x, y, width, height ); |
| 273 | return Subtract( reg ); |
| 274 | } |
| 275 | |
| 276 | bool wxRegion::Subtract( const wxRect& rect ) |
| 277 | { |
| 278 | wxRegion reg( rect ); |
| 279 | return Subtract( reg ); |
| 280 | } |
| 281 | |
| 282 | bool wxRegion::Subtract( const wxRegion& region ) |
| 283 | { |
| 284 | if (region.IsNull()) |
| 285 | return FALSE; |
| 286 | |
| 287 | if (!m_refData) |
| 288 | { |
| 289 | m_refData = new wxRegionRefData(); |
| 290 | M_REGIONDATA->m_region = gdk_region_new(); |
| 291 | } |
| 292 | else |
| 293 | { |
| 294 | AllocExclusive(); |
| 295 | } |
| 296 | |
| 297 | #ifdef __WXGTK20__ |
| 298 | gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() ); |
| 299 | #else |
| 300 | GdkRegion *reg = gdk_regions_subtract( M_REGIONDATA->m_region, region.GetRegion() ); |
| 301 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 302 | M_REGIONDATA->m_region = reg; |
| 303 | #endif |
| 304 | |
| 305 | return TRUE; |
| 306 | } |
| 307 | |
| 308 | bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) |
| 309 | { |
| 310 | wxRegion reg( x, y, width, height ); |
| 311 | return Xor( reg ); |
| 312 | } |
| 313 | |
| 314 | bool wxRegion::Xor( const wxRect& rect ) |
| 315 | { |
| 316 | wxRegion reg( rect ); |
| 317 | return Xor( reg ); |
| 318 | } |
| 319 | |
| 320 | bool wxRegion::Xor( const wxRegion& region ) |
| 321 | { |
| 322 | if (region.IsNull()) |
| 323 | return FALSE; |
| 324 | |
| 325 | if (!m_refData) |
| 326 | { |
| 327 | m_refData = new wxRegionRefData(); |
| 328 | M_REGIONDATA->m_region = gdk_region_new(); |
| 329 | } |
| 330 | else |
| 331 | { |
| 332 | AllocExclusive(); |
| 333 | } |
| 334 | |
| 335 | #ifdef __WXGTK20__ |
| 336 | gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() ); |
| 337 | #else |
| 338 | GdkRegion *reg = gdk_regions_xor( M_REGIONDATA->m_region, region.GetRegion() ); |
| 339 | gdk_region_destroy( M_REGIONDATA->m_region ); |
| 340 | M_REGIONDATA->m_region = reg; |
| 341 | #endif |
| 342 | |
| 343 | return TRUE; |
| 344 | } |
| 345 | |
| 346 | // ---------------------------------------------------------------------------- |
| 347 | // wxRegion tests |
| 348 | // ---------------------------------------------------------------------------- |
| 349 | |
| 350 | void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const |
| 351 | { |
| 352 | if ( m_refData ) |
| 353 | { |
| 354 | GdkRectangle rect; |
| 355 | gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect ); |
| 356 | x = rect.x; |
| 357 | y = rect.y; |
| 358 | w = rect.width; |
| 359 | h = rect.height; |
| 360 | } |
| 361 | else |
| 362 | { |
| 363 | x = 0; |
| 364 | y = 0; |
| 365 | w = -1; |
| 366 | h = -1; |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | wxRect wxRegion::GetBox() const |
| 371 | { |
| 372 | wxCoord x, y, w, h; |
| 373 | GetBox( x, y, w, h ); |
| 374 | return wxRect( x, y, w, h ); |
| 375 | } |
| 376 | |
| 377 | bool wxRegion::Offset( wxCoord x, wxCoord y ) |
| 378 | { |
| 379 | if (!m_refData) |
| 380 | return FALSE; |
| 381 | |
| 382 | AllocExclusive(); |
| 383 | |
| 384 | gdk_region_offset( M_REGIONDATA->m_region, x, y ); |
| 385 | |
| 386 | return TRUE; |
| 387 | } |
| 388 | |
| 389 | bool wxRegion::Empty() const |
| 390 | { |
| 391 | if (!m_refData) |
| 392 | return TRUE; |
| 393 | |
| 394 | return gdk_region_empty( M_REGIONDATA->m_region ); |
| 395 | } |
| 396 | |
| 397 | wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const |
| 398 | { |
| 399 | if (!m_refData) |
| 400 | return wxOutRegion; |
| 401 | |
| 402 | if (gdk_region_point_in( M_REGIONDATA->m_region, x, y )) |
| 403 | return wxInRegion; |
| 404 | else |
| 405 | return wxOutRegion; |
| 406 | } |
| 407 | |
| 408 | wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const |
| 409 | { |
| 410 | if (!m_refData) |
| 411 | return wxOutRegion; |
| 412 | |
| 413 | GdkRectangle rect; |
| 414 | rect.x = x; |
| 415 | rect.y = y; |
| 416 | rect.width = w; |
| 417 | rect.height = h; |
| 418 | GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect ); |
| 419 | switch (res) |
| 420 | { |
| 421 | case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion; |
| 422 | case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion; |
| 423 | case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion; |
| 424 | } |
| 425 | return wxOutRegion; |
| 426 | } |
| 427 | |
| 428 | wxRegionContain wxRegion::Contains(const wxPoint& pt) const |
| 429 | { |
| 430 | return Contains( pt.x, pt.y ); |
| 431 | } |
| 432 | |
| 433 | wxRegionContain wxRegion::Contains(const wxRect& rect) const |
| 434 | { |
| 435 | return Contains( rect.x, rect.y, rect.width, rect.height ); |
| 436 | } |
| 437 | |
| 438 | GdkRegion *wxRegion::GetRegion() const |
| 439 | { |
| 440 | if (!m_refData) |
| 441 | return (GdkRegion*) NULL; |
| 442 | |
| 443 | return M_REGIONDATA->m_region; |
| 444 | } |
| 445 | |
| 446 | // ---------------------------------------------------------------------------- |
| 447 | // wxRegionIterator |
| 448 | // ---------------------------------------------------------------------------- |
| 449 | |
| 450 | #ifndef __WXGTK20__ |
| 451 | |
| 452 | // the following structures must match the private structures |
| 453 | // in X11 region code ( xc/lib/X11/region.h ) |
| 454 | |
| 455 | // this makes the Region type transparent |
| 456 | // and we have access to the region rectangles |
| 457 | |
| 458 | #include <gdk/gdkprivate.h> |
| 459 | |
| 460 | struct _XBox { |
| 461 | short x1, x2, y1, y2; |
| 462 | }; |
| 463 | |
| 464 | struct _XRegion { |
| 465 | long size , numRects; |
| 466 | _XBox *rects, extents; |
| 467 | }; |
| 468 | |
| 469 | #endif |
| 470 | |
| 471 | class wxRIRefData: public wxObjectRefData |
| 472 | { |
| 473 | public: |
| 474 | |
| 475 | wxRIRefData() : m_rects(0), m_numRects(0){} |
| 476 | ~wxRIRefData(); |
| 477 | |
| 478 | wxRect *m_rects; |
| 479 | size_t m_numRects; |
| 480 | |
| 481 | void CreateRects( const wxRegion& r ); |
| 482 | }; |
| 483 | |
| 484 | wxRIRefData::~wxRIRefData() |
| 485 | { |
| 486 | delete m_rects; |
| 487 | } |
| 488 | |
| 489 | void wxRIRefData::CreateRects( const wxRegion& region ) |
| 490 | { |
| 491 | if (m_rects) |
| 492 | delete m_rects; |
| 493 | |
| 494 | m_rects = 0; |
| 495 | m_numRects = 0; |
| 496 | |
| 497 | GdkRegion *gdkregion = region.GetRegion(); |
| 498 | if (!gdkregion) return; |
| 499 | |
| 500 | #ifdef __WXGTK20__ |
| 501 | GdkRectangles *gdkrects = NULL; |
| 502 | gint numRects = 0; |
| 503 | gdk_region_get_rectangles( gdkregion, &gdkrect, &numRects ); |
| 504 | |
| 505 | m_numRects = numRects; |
| 506 | if (numRects) |
| 507 | { |
| 508 | m_rects = new wxRect[m_numRects]; |
| 509 | for (size_t i=0; i < m_numRects; ++i) |
| 510 | { |
| 511 | GdkRectangle &gr = gdkrects[i]; |
| 512 | wxRect &wr = m_rects[i]; |
| 513 | wr.x = gr.x; |
| 514 | wr.y = gr.y; |
| 515 | wr.width = gr.width; |
| 516 | wr.height = gr.height; |
| 517 | } |
| 518 | } |
| 519 | g_delete( gdkrects ); // delete [] |
| 520 | #else |
| 521 | Region r = ((GdkRegionPrivate *)gdkregion)->xregion; |
| 522 | if (r) |
| 523 | { |
| 524 | m_numRects = r->numRects; |
| 525 | if (m_numRects) |
| 526 | { |
| 527 | m_rects = new wxRect[m_numRects]; |
| 528 | for (size_t i=0; i < m_numRects; ++i) |
| 529 | { |
| 530 | _XBox &xr = r->rects[i]; |
| 531 | wxRect &wr = m_rects[i]; |
| 532 | wr.x = xr.x1; |
| 533 | wr.y = xr.y1; |
| 534 | wr.width = xr.x2-xr.x1; |
| 535 | wr.height = xr.y2-xr.y1; |
| 536 | } |
| 537 | } |
| 538 | } |
| 539 | #endif |
| 540 | } |
| 541 | |
| 542 | wxRegionIterator::wxRegionIterator() |
| 543 | { |
| 544 | m_refData = new wxRIRefData(); |
| 545 | Reset(); |
| 546 | } |
| 547 | |
| 548 | wxRegionIterator::wxRegionIterator( const wxRegion& region ) |
| 549 | { |
| 550 | m_refData = new wxRIRefData(); |
| 551 | Reset(region); |
| 552 | } |
| 553 | |
| 554 | void wxRegionIterator::Reset( const wxRegion& region ) |
| 555 | { |
| 556 | m_region = region; |
| 557 | ((wxRIRefData*)m_refData)->CreateRects(region); |
| 558 | Reset(); |
| 559 | } |
| 560 | |
| 561 | bool wxRegionIterator::HaveRects() const |
| 562 | { |
| 563 | return m_current < ((wxRIRefData*)m_refData)->m_numRects; |
| 564 | } |
| 565 | |
| 566 | wxRegionIterator::operator bool () const |
| 567 | { |
| 568 | return HaveRects(); |
| 569 | } |
| 570 | |
| 571 | void wxRegionIterator::operator ++ () |
| 572 | { |
| 573 | if (HaveRects()) ++m_current; |
| 574 | } |
| 575 | |
| 576 | void wxRegionIterator::operator ++ (int) |
| 577 | { |
| 578 | if (HaveRects()) ++m_current; |
| 579 | } |
| 580 | |
| 581 | wxCoord wxRegionIterator::GetX() const |
| 582 | { |
| 583 | if( !HaveRects() ) return 0; |
| 584 | return ((wxRIRefData*)m_refData)->m_rects[m_current].x; |
| 585 | } |
| 586 | |
| 587 | wxCoord wxRegionIterator::GetY() const |
| 588 | { |
| 589 | if( !HaveRects() ) return 0; |
| 590 | return ((wxRIRefData*)m_refData)->m_rects[m_current].y; |
| 591 | } |
| 592 | |
| 593 | wxCoord wxRegionIterator::GetW() const |
| 594 | { |
| 595 | if( !HaveRects() ) return -1; |
| 596 | return ((wxRIRefData*)m_refData)->m_rects[m_current].width; |
| 597 | } |
| 598 | |
| 599 | wxCoord wxRegionIterator::GetH() const |
| 600 | { |
| 601 | if( !HaveRects() ) return -1; |
| 602 | return ((wxRIRefData*)m_refData)->m_rects[m_current].height; |
| 603 | } |
| 604 | |
| 605 | wxRect wxRegionIterator::GetRect() const |
| 606 | { |
| 607 | wxRect r; |
| 608 | if( HaveRects() ) |
| 609 | r = ((wxRIRefData*)m_refData)->m_rects[m_current]; |
| 610 | |
| 611 | return r; |
| 612 | } |
| 613 | |