| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // File: region.cpp |
| 3 | // Purpose: Region class |
| 4 | // Author: Julian Smart, Robert Roebling |
| 5 | // Created: Fri Oct 24 10:46:34 MET 1997 |
| 6 | // RCS-ID: $Id$ |
| 7 | // Copyright: (c) 1997 Julian Smart, Robert Roebling |
| 8 | // Licence: wxWindows licence |
| 9 | ///////////////////////////////////////////////////////////////////////////// |
| 10 | |
| 11 | #ifdef __GNUG__ |
| 12 | #pragma implementation "region.h" |
| 13 | #endif |
| 14 | |
| 15 | #include "wx/region.h" |
| 16 | #include "wx/gdicmn.h" |
| 17 | #include "wx/log.h" |
| 18 | |
| 19 | #ifdef __VMS__ |
| 20 | #pragma message disable nosimpint |
| 21 | #endif |
| 22 | #include "wx/x11/private.h" |
| 23 | #include "X11/Xutil.h" |
| 24 | #ifdef __VMS__ |
| 25 | #pragma message enable nosimpint |
| 26 | #endif |
| 27 | |
| 28 | // ---------------------------------------------------------------------------- |
| 29 | // wxRegionRefData: private class containing the information about the region |
| 30 | // ---------------------------------------------------------------------------- |
| 31 | |
| 32 | class wxRegionRefData : public wxObjectRefData |
| 33 | { |
| 34 | public: |
| 35 | wxRegionRefData() |
| 36 | { |
| 37 | m_region = NULL; |
| 38 | } |
| 39 | |
| 40 | wxRegionRefData(const wxRegionRefData& refData) |
| 41 | { |
| 42 | m_region = XCreateRegion(); |
| 43 | XUnionRegion( refData.m_region, m_region, m_region ); |
| 44 | } |
| 45 | |
| 46 | ~wxRegionRefData() |
| 47 | { |
| 48 | if (m_region) |
| 49 | XDestroyRegion( m_region ); |
| 50 | } |
| 51 | |
| 52 | Region m_region; |
| 53 | }; |
| 54 | |
| 55 | // ---------------------------------------------------------------------------- |
| 56 | // macros |
| 57 | // ---------------------------------------------------------------------------- |
| 58 | |
| 59 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) |
| 60 | #define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData)) |
| 61 | |
| 62 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject); |
| 63 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject); |
| 64 | |
| 65 | // ---------------------------------------------------------------------------- |
| 66 | // wxRegion construction |
| 67 | // ---------------------------------------------------------------------------- |
| 68 | |
| 69 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) |
| 70 | |
| 71 | void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h) |
| 72 | { |
| 73 | XRectangle rect; |
| 74 | rect.x = x; |
| 75 | rect.y = y; |
| 76 | rect.width = w; |
| 77 | rect.height = h; |
| 78 | |
| 79 | m_refData = new wxRegionRefData(); |
| 80 | |
| 81 | M_REGIONDATA->m_region = XCreateRegion(); |
| 82 | XUnionRectWithRegion( &rect, M_REGIONDATA->m_region, M_REGIONDATA->m_region ); |
| 83 | } |
| 84 | |
| 85 | wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle ) |
| 86 | { |
| 87 | #if 0 |
| 88 | XPoint *xpoints = new XPoint[n]; |
| 89 | for ( size_t i = 0 ; i < n ; i++ ) |
| 90 | { |
| 91 | xpoints[i].x = points[i].x; |
| 92 | xpoints[i].y = points[i].y; |
| 93 | } |
| 94 | |
| 95 | m_refData = new wxRegionRefData(); |
| 96 | |
| 97 | Region* reg = gdk_region_polygon |
| 98 | ( |
| 99 | gdkpoints, |
| 100 | n, |
| 101 | fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE |
| 102 | : GDK_EVEN_ODD_RULE |
| 103 | ); |
| 104 | |
| 105 | M_REGIONDATA->m_region = reg; |
| 106 | |
| 107 | delete [] xpoints; |
| 108 | #endif |
| 109 | } |
| 110 | |
| 111 | wxRegion::~wxRegion() |
| 112 | { |
| 113 | // m_refData unrefed in ~wxObject |
| 114 | } |
| 115 | |
| 116 | wxObjectRefData *wxRegion::CreateRefData() const |
| 117 | { |
| 118 | return new wxRegionRefData; |
| 119 | } |
| 120 | |
| 121 | wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const |
| 122 | { |
| 123 | return new wxRegionRefData(*(wxRegionRefData *)data); |
| 124 | } |
| 125 | |
| 126 | // ---------------------------------------------------------------------------- |
| 127 | // wxRegion comparison |
| 128 | // ---------------------------------------------------------------------------- |
| 129 | |
| 130 | bool wxRegion::operator==( const wxRegion& region ) |
| 131 | { |
| 132 | if (m_refData == region.m_refData) return TRUE; |
| 133 | |
| 134 | if (!m_refData || !region.m_refData) return FALSE; |
| 135 | |
| 136 | // compare the regions themselves, not the pointers to ref data! |
| 137 | return XEqualRegion( M_REGIONDATA->m_region, |
| 138 | M_REGIONDATA_OF(region)->m_region ); |
| 139 | } |
| 140 | |
| 141 | // ---------------------------------------------------------------------------- |
| 142 | // wxRegion operations |
| 143 | // ---------------------------------------------------------------------------- |
| 144 | |
| 145 | void wxRegion::Clear() |
| 146 | { |
| 147 | UnRef(); |
| 148 | } |
| 149 | |
| 150 | bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) |
| 151 | { |
| 152 | // work around for XUnionRectWithRegion() bug: taking a union with an empty |
| 153 | // rect results in an empty region (at least XFree 3.3.6 and 4.0 have this |
| 154 | // problem) |
| 155 | if ( !width || !height ) |
| 156 | return TRUE; |
| 157 | |
| 158 | XRectangle rect; |
| 159 | rect.x = x; |
| 160 | rect.y = y; |
| 161 | rect.width = width; |
| 162 | rect.height = height; |
| 163 | |
| 164 | if (!m_refData) |
| 165 | { |
| 166 | m_refData = new wxRegionRefData(); |
| 167 | M_REGIONDATA->m_region = XCreateRegion(); |
| 168 | XUnionRectWithRegion( &rect, M_REGIONDATA->m_region, M_REGIONDATA->m_region ); |
| 169 | } |
| 170 | else |
| 171 | { |
| 172 | AllocExclusive(); |
| 173 | |
| 174 | XUnionRectWithRegion( &rect, M_REGIONDATA->m_region, M_REGIONDATA->m_region ); |
| 175 | } |
| 176 | |
| 177 | return TRUE; |
| 178 | } |
| 179 | |
| 180 | bool wxRegion::Union( const wxRect& rect ) |
| 181 | { |
| 182 | return Union( rect.x, rect.y, rect.width, rect.height ); |
| 183 | } |
| 184 | |
| 185 | bool wxRegion::Union( const wxRegion& region ) |
| 186 | { |
| 187 | if (region.IsNull()) |
| 188 | return FALSE; |
| 189 | |
| 190 | if (!m_refData) |
| 191 | { |
| 192 | m_refData = new wxRegionRefData(); |
| 193 | M_REGIONDATA->m_region = XCreateRegion(); |
| 194 | } |
| 195 | else |
| 196 | { |
| 197 | AllocExclusive(); |
| 198 | } |
| 199 | |
| 200 | XUnionRegion( M_REGIONDATA->m_region, |
| 201 | M_REGIONDATA_OF(region)->m_region, |
| 202 | M_REGIONDATA->m_region ); |
| 203 | |
| 204 | return TRUE; |
| 205 | } |
| 206 | |
| 207 | bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) |
| 208 | { |
| 209 | wxRegion reg( x, y, width, height ); |
| 210 | |
| 211 | return Intersect( reg ); |
| 212 | } |
| 213 | |
| 214 | bool wxRegion::Intersect( const wxRect& rect ) |
| 215 | { |
| 216 | wxRegion reg( rect ); |
| 217 | |
| 218 | return Intersect( reg ); |
| 219 | } |
| 220 | |
| 221 | bool wxRegion::Intersect( const wxRegion& region ) |
| 222 | { |
| 223 | if (region.IsNull()) |
| 224 | return FALSE; |
| 225 | |
| 226 | if (!m_refData) |
| 227 | { |
| 228 | m_refData = new wxRegionRefData(); |
| 229 | M_REGIONDATA->m_region = XCreateRegion(); |
| 230 | |
| 231 | // leave here |
| 232 | return TRUE; |
| 233 | } |
| 234 | else |
| 235 | { |
| 236 | AllocExclusive(); |
| 237 | } |
| 238 | |
| 239 | XIntersectRegion( M_REGIONDATA->m_region, |
| 240 | M_REGIONDATA_OF(region)->m_region, |
| 241 | M_REGIONDATA->m_region ); |
| 242 | |
| 243 | return TRUE; |
| 244 | } |
| 245 | |
| 246 | bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) |
| 247 | { |
| 248 | wxRegion reg( x, y, width, height ); |
| 249 | return Subtract( reg ); |
| 250 | } |
| 251 | |
| 252 | bool wxRegion::Subtract( const wxRect& rect ) |
| 253 | { |
| 254 | wxRegion reg( rect ); |
| 255 | return Subtract( reg ); |
| 256 | } |
| 257 | |
| 258 | bool wxRegion::Subtract( const wxRegion& region ) |
| 259 | { |
| 260 | if (region.IsNull()) |
| 261 | return FALSE; |
| 262 | |
| 263 | if (!m_refData) |
| 264 | { |
| 265 | m_refData = new wxRegionRefData(); |
| 266 | M_REGIONDATA->m_region = XCreateRegion(); |
| 267 | } |
| 268 | else |
| 269 | { |
| 270 | AllocExclusive(); |
| 271 | } |
| 272 | |
| 273 | XSubtractRegion( M_REGIONDATA->m_region, |
| 274 | M_REGIONDATA_OF(region)->m_region, |
| 275 | M_REGIONDATA->m_region ); |
| 276 | |
| 277 | return TRUE; |
| 278 | } |
| 279 | |
| 280 | bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height ) |
| 281 | { |
| 282 | wxRegion reg( x, y, width, height ); |
| 283 | return Xor( reg ); |
| 284 | } |
| 285 | |
| 286 | bool wxRegion::Xor( const wxRect& rect ) |
| 287 | { |
| 288 | wxRegion reg( rect ); |
| 289 | return Xor( reg ); |
| 290 | } |
| 291 | |
| 292 | bool wxRegion::Xor( const wxRegion& region ) |
| 293 | { |
| 294 | if (region.IsNull()) |
| 295 | return FALSE; |
| 296 | |
| 297 | if (!m_refData) |
| 298 | { |
| 299 | m_refData = new wxRegionRefData(); |
| 300 | M_REGIONDATA->m_region = XCreateRegion(); |
| 301 | } |
| 302 | else |
| 303 | { |
| 304 | AllocExclusive(); |
| 305 | } |
| 306 | |
| 307 | XXorRegion( M_REGIONDATA->m_region, |
| 308 | M_REGIONDATA_OF(region)->m_region, |
| 309 | M_REGIONDATA->m_region ); |
| 310 | |
| 311 | return TRUE; |
| 312 | } |
| 313 | |
| 314 | // ---------------------------------------------------------------------------- |
| 315 | // wxRegion tests |
| 316 | // ---------------------------------------------------------------------------- |
| 317 | |
| 318 | void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const |
| 319 | { |
| 320 | if (m_refData) |
| 321 | { |
| 322 | XRectangle rect; |
| 323 | XClipBox( M_REGIONDATA->m_region, &rect ); |
| 324 | x = rect.x; |
| 325 | y = rect.y; |
| 326 | w = rect.width; |
| 327 | h = rect.height; |
| 328 | } |
| 329 | else |
| 330 | { |
| 331 | x = 0; |
| 332 | y = 0; |
| 333 | w = -1; |
| 334 | h = -1; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | wxRect wxRegion::GetBox() const |
| 339 | { |
| 340 | wxCoord x, y, w, h; |
| 341 | GetBox( x, y, w, h ); |
| 342 | return wxRect( x, y, w, h ); |
| 343 | } |
| 344 | |
| 345 | bool wxRegion::Offset( wxCoord x, wxCoord y ) |
| 346 | { |
| 347 | if (!m_refData) |
| 348 | return FALSE; |
| 349 | |
| 350 | AllocExclusive(); |
| 351 | |
| 352 | XOffsetRegion( M_REGIONDATA->m_region, x, y ); |
| 353 | |
| 354 | return TRUE; |
| 355 | } |
| 356 | |
| 357 | bool wxRegion::Empty() const |
| 358 | { |
| 359 | if (!m_refData) |
| 360 | return TRUE; |
| 361 | |
| 362 | return XEmptyRegion( M_REGIONDATA->m_region ); |
| 363 | } |
| 364 | |
| 365 | wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const |
| 366 | { |
| 367 | if (!m_refData) |
| 368 | return wxOutRegion; |
| 369 | |
| 370 | if (XPointInRegion( M_REGIONDATA->m_region, x, y )) |
| 371 | return wxInRegion; |
| 372 | else |
| 373 | return wxOutRegion; |
| 374 | } |
| 375 | |
| 376 | wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const |
| 377 | { |
| 378 | if (!m_refData) |
| 379 | return wxOutRegion; |
| 380 | |
| 381 | int res = XRectInRegion( M_REGIONDATA->m_region, x, y, w, h ); |
| 382 | switch (res) |
| 383 | { |
| 384 | case RectangleIn: return wxInRegion; |
| 385 | case RectangleOut: return wxOutRegion; |
| 386 | case RectanglePart: return wxPartRegion; |
| 387 | } |
| 388 | return wxOutRegion; |
| 389 | } |
| 390 | |
| 391 | wxRegionContain wxRegion::Contains(const wxPoint& pt) const |
| 392 | { |
| 393 | return Contains( pt.x, pt.y ); |
| 394 | } |
| 395 | |
| 396 | wxRegionContain wxRegion::Contains(const wxRect& rect) const |
| 397 | { |
| 398 | return Contains( rect.x, rect.y, rect.width, rect.height ); |
| 399 | } |
| 400 | |
| 401 | WXRegion *wxRegion::GetX11Region() const |
| 402 | { |
| 403 | if (!m_refData) |
| 404 | return (WXRegion*) NULL; |
| 405 | |
| 406 | return (WXRegion*) M_REGIONDATA->m_region; |
| 407 | } |
| 408 | |
| 409 | // ---------------------------------------------------------------------------- |
| 410 | // wxRegionIterator |
| 411 | // ---------------------------------------------------------------------------- |
| 412 | |
| 413 | // the following structures must match the private structures |
| 414 | // in X11 region code ( xc/lib/X11/region.h ) |
| 415 | |
| 416 | // this makes the Region type transparent |
| 417 | // and we have access to the region rectangles |
| 418 | |
| 419 | struct _XBox { |
| 420 | short x1, x2, y1, y2; |
| 421 | }; |
| 422 | |
| 423 | struct _XRegion { |
| 424 | long size , numRects; |
| 425 | _XBox *rects, extents; |
| 426 | }; |
| 427 | |
| 428 | class wxRIRefData: public wxObjectRefData |
| 429 | { |
| 430 | public: |
| 431 | |
| 432 | wxRIRefData() : m_rects(0), m_numRects(0){} |
| 433 | ~wxRIRefData(); |
| 434 | |
| 435 | wxRect *m_rects; |
| 436 | size_t m_numRects; |
| 437 | |
| 438 | void CreateRects( const wxRegion& r ); |
| 439 | }; |
| 440 | |
| 441 | wxRIRefData::~wxRIRefData() |
| 442 | { |
| 443 | delete [] m_rects; |
| 444 | } |
| 445 | |
| 446 | void wxRIRefData::CreateRects( const wxRegion& region ) |
| 447 | { |
| 448 | if (m_rects) |
| 449 | delete [] m_rects; |
| 450 | |
| 451 | m_rects = 0; |
| 452 | m_numRects = 0; |
| 453 | |
| 454 | if (region.IsEmpty()) return; |
| 455 | |
| 456 | Region r = (Region) region.GetX11Region(); |
| 457 | if (r) |
| 458 | { |
| 459 | #if wxUSE_NANOX |
| 460 | GR_RECT rect; |
| 461 | GrGetRegionBox(r, & rect); |
| 462 | m_numRects = 1; |
| 463 | m_rects = new wxRect[1]; |
| 464 | m_rects[0].x = rect.x; |
| 465 | m_rects[0].y = rect.y; |
| 466 | m_rects[0].width = rect.width; |
| 467 | m_rects[0].height = rect.height; |
| 468 | #else |
| 469 | m_numRects = r->numRects; |
| 470 | if (m_numRects) |
| 471 | { |
| 472 | m_rects = new wxRect[m_numRects]; |
| 473 | for (size_t i=0; i < m_numRects; ++i) |
| 474 | { |
| 475 | _XBox &xr = r->rects[i]; |
| 476 | wxRect &wr = m_rects[i]; |
| 477 | wr.x = xr.x1; |
| 478 | wr.y = xr.y1; |
| 479 | wr.width = xr.x2-xr.x1; |
| 480 | wr.height = xr.y2-xr.y1; |
| 481 | } |
| 482 | } |
| 483 | #endif |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | wxRegionIterator::wxRegionIterator() |
| 488 | { |
| 489 | m_refData = new wxRIRefData(); |
| 490 | Reset(); |
| 491 | } |
| 492 | |
| 493 | wxRegionIterator::wxRegionIterator( const wxRegion& region ) |
| 494 | { |
| 495 | m_refData = new wxRIRefData(); |
| 496 | Reset(region); |
| 497 | } |
| 498 | |
| 499 | void wxRegionIterator::Reset( const wxRegion& region ) |
| 500 | { |
| 501 | m_region = region; |
| 502 | ((wxRIRefData*)m_refData)->CreateRects(region); |
| 503 | Reset(); |
| 504 | } |
| 505 | |
| 506 | bool wxRegionIterator::HaveRects() const |
| 507 | { |
| 508 | return m_current < ((wxRIRefData*)m_refData)->m_numRects; |
| 509 | } |
| 510 | |
| 511 | wxRegionIterator::operator bool () const |
| 512 | { |
| 513 | return HaveRects(); |
| 514 | } |
| 515 | |
| 516 | void wxRegionIterator::operator ++ () |
| 517 | { |
| 518 | if (HaveRects()) ++m_current; |
| 519 | } |
| 520 | |
| 521 | void wxRegionIterator::operator ++ (int) |
| 522 | { |
| 523 | if (HaveRects()) ++m_current; |
| 524 | } |
| 525 | |
| 526 | wxCoord wxRegionIterator::GetX() const |
| 527 | { |
| 528 | if( !HaveRects() ) return 0; |
| 529 | return ((wxRIRefData*)m_refData)->m_rects[m_current].x; |
| 530 | } |
| 531 | |
| 532 | wxCoord wxRegionIterator::GetY() const |
| 533 | { |
| 534 | if( !HaveRects() ) return 0; |
| 535 | return ((wxRIRefData*)m_refData)->m_rects[m_current].y; |
| 536 | } |
| 537 | |
| 538 | wxCoord wxRegionIterator::GetW() const |
| 539 | { |
| 540 | if( !HaveRects() ) return -1; |
| 541 | return ((wxRIRefData*)m_refData)->m_rects[m_current].width; |
| 542 | } |
| 543 | |
| 544 | wxCoord wxRegionIterator::GetH() const |
| 545 | { |
| 546 | if( !HaveRects() ) return -1; |
| 547 | return ((wxRIRefData*)m_refData)->m_rects[m_current].height; |
| 548 | } |
| 549 | |
| 550 | wxRect wxRegionIterator::GetRect() const |
| 551 | { |
| 552 | wxRect r; |
| 553 | if( HaveRects() ) |
| 554 | r = ((wxRIRefData*)m_refData)->m_rects[m_current]; |
| 555 | |
| 556 | return r; |
| 557 | } |
| 558 | |