| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/msw/region.cpp |
| 3 | // Purpose: wxRegion implementation using Win32 API |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Modified by: |
| 6 | // Created: Fri Oct 24 10:46:34 MET 1997 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 1997-2002 wxWidgets team |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | // For compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #ifdef __BORLANDC__ |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #include "wx/region.h" |
| 28 | |
| 29 | #ifndef WX_PRECOMP |
| 30 | #include "wx/gdicmn.h" |
| 31 | #endif |
| 32 | |
| 33 | #include "wx/msw/private.h" |
| 34 | |
| 35 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject) |
| 36 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject) |
| 37 | |
| 38 | // ---------------------------------------------------------------------------- |
| 39 | // wxRegionRefData implementation |
| 40 | // ---------------------------------------------------------------------------- |
| 41 | |
| 42 | class WXDLLEXPORT wxRegionRefData : public wxGDIRefData |
| 43 | { |
| 44 | public: |
| 45 | wxRegionRefData() |
| 46 | { |
| 47 | m_region = 0; |
| 48 | } |
| 49 | |
| 50 | wxRegionRefData(const wxRegionRefData& data) : wxGDIRefData() |
| 51 | { |
| 52 | #if defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__) |
| 53 | DWORD noBytes = ::GetRegionData(data.m_region, 0, NULL); |
| 54 | RGNDATA *rgnData = (RGNDATA*) new char[noBytes]; |
| 55 | ::GetRegionData(data.m_region, noBytes, rgnData); |
| 56 | m_region = ::ExtCreateRegion(NULL, noBytes, rgnData); |
| 57 | delete[] (char*) rgnData; |
| 58 | #else |
| 59 | RECT rect; |
| 60 | ::GetRgnBox(data.m_region, &rect); |
| 61 | m_region = ::CreateRectRgnIndirect(&rect); |
| 62 | #endif |
| 63 | } |
| 64 | |
| 65 | virtual ~wxRegionRefData() |
| 66 | { |
| 67 | ::DeleteObject(m_region); |
| 68 | m_region = 0; |
| 69 | } |
| 70 | |
| 71 | HRGN m_region; |
| 72 | |
| 73 | private: |
| 74 | // Cannot use |
| 75 | // DECLARE_NO_COPY_CLASS(wxRegionRefData) |
| 76 | // because copy constructor is explicitly declared above; |
| 77 | // but no copy assignment operator is defined, so declare |
| 78 | // it private to prevent the compiler from defining it: |
| 79 | wxRegionRefData& operator=(const wxRegionRefData&); |
| 80 | }; |
| 81 | |
| 82 | #define M_REGION (((wxRegionRefData*)m_refData)->m_region) |
| 83 | #define M_REGION_OF(rgn) (((wxRegionRefData*)(rgn.m_refData))->m_region) |
| 84 | |
| 85 | // ============================================================================ |
| 86 | // wxRegion implementation |
| 87 | // ============================================================================ |
| 88 | |
| 89 | // ---------------------------------------------------------------------------- |
| 90 | // ctors and dtor |
| 91 | // ---------------------------------------------------------------------------- |
| 92 | |
| 93 | wxRegion::wxRegion() |
| 94 | { |
| 95 | m_refData = (wxRegionRefData *)NULL; |
| 96 | } |
| 97 | |
| 98 | wxRegion::wxRegion(WXHRGN hRegion) |
| 99 | { |
| 100 | m_refData = new wxRegionRefData; |
| 101 | M_REGION = (HRGN) hRegion; |
| 102 | } |
| 103 | |
| 104 | wxRegion::wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h) |
| 105 | { |
| 106 | m_refData = new wxRegionRefData; |
| 107 | M_REGION = ::CreateRectRgn(x, y, x + w, y + h); |
| 108 | } |
| 109 | |
| 110 | wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight) |
| 111 | { |
| 112 | m_refData = new wxRegionRefData; |
| 113 | M_REGION = ::CreateRectRgn(topLeft.x, topLeft.y, bottomRight.x, bottomRight.y); |
| 114 | } |
| 115 | |
| 116 | wxRegion::wxRegion(const wxRect& rect) |
| 117 | { |
| 118 | m_refData = new wxRegionRefData; |
| 119 | M_REGION = ::CreateRectRgn(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height); |
| 120 | } |
| 121 | |
| 122 | wxRegion::wxRegion(size_t n, const wxPoint *points, int fillStyle) |
| 123 | { |
| 124 | #if defined(__WXMICROWIN__) || defined(__WXWINCE__) |
| 125 | wxUnusedVar(n); |
| 126 | wxUnusedVar(points); |
| 127 | wxUnusedVar(fillStyle); |
| 128 | m_refData = NULL; |
| 129 | M_REGION = NULL; |
| 130 | #else |
| 131 | m_refData = new wxRegionRefData; |
| 132 | M_REGION = ::CreatePolygonRgn |
| 133 | ( |
| 134 | (POINT*)points, |
| 135 | n, |
| 136 | fillStyle == wxODDEVEN_RULE ? ALTERNATE : WINDING |
| 137 | ); |
| 138 | #endif |
| 139 | } |
| 140 | |
| 141 | wxRegion::~wxRegion() |
| 142 | { |
| 143 | // m_refData unrefed in ~wxObject |
| 144 | } |
| 145 | |
| 146 | wxObjectRefData *wxRegion::CreateRefData() const |
| 147 | { |
| 148 | return new wxRegionRefData; |
| 149 | } |
| 150 | |
| 151 | wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const |
| 152 | { |
| 153 | return new wxRegionRefData(*(wxRegionRefData *)data); |
| 154 | } |
| 155 | |
| 156 | // ---------------------------------------------------------------------------- |
| 157 | // wxRegion operations |
| 158 | // ---------------------------------------------------------------------------- |
| 159 | |
| 160 | // Clear current region |
| 161 | void wxRegion::Clear() |
| 162 | { |
| 163 | UnRef(); |
| 164 | } |
| 165 | |
| 166 | bool wxRegion::DoOffset(wxCoord x, wxCoord y) |
| 167 | { |
| 168 | wxCHECK_MSG( M_REGION, false, _T("invalid wxRegion") ); |
| 169 | |
| 170 | if ( !x && !y ) |
| 171 | { |
| 172 | // nothing to do |
| 173 | return true; |
| 174 | } |
| 175 | |
| 176 | AllocExclusive(); |
| 177 | |
| 178 | if ( ::OffsetRgn(GetHrgn(), x, y) == ERROR ) |
| 179 | { |
| 180 | wxLogLastError(_T("OffsetRgn")); |
| 181 | |
| 182 | return false; |
| 183 | } |
| 184 | |
| 185 | return true; |
| 186 | } |
| 187 | |
| 188 | // combine another region with this one |
| 189 | bool wxRegion::DoCombine(const wxRegion& rgn, wxRegionOp op) |
| 190 | { |
| 191 | // we can't use the API functions if we don't have a valid region handle |
| 192 | if ( !m_refData ) |
| 193 | { |
| 194 | // combining with an empty/invalid region works differently depending |
| 195 | // on the operation |
| 196 | switch ( op ) |
| 197 | { |
| 198 | case wxRGN_COPY: |
| 199 | case wxRGN_OR: |
| 200 | case wxRGN_XOR: |
| 201 | *this = rgn; |
| 202 | break; |
| 203 | |
| 204 | default: |
| 205 | wxFAIL_MSG( _T("unknown region operation") ); |
| 206 | // fall through |
| 207 | |
| 208 | case wxRGN_AND: |
| 209 | case wxRGN_DIFF: |
| 210 | // leave empty/invalid |
| 211 | return false; |
| 212 | } |
| 213 | } |
| 214 | else // we have a valid region |
| 215 | { |
| 216 | AllocExclusive(); |
| 217 | |
| 218 | int mode; |
| 219 | switch ( op ) |
| 220 | { |
| 221 | case wxRGN_AND: |
| 222 | mode = RGN_AND; |
| 223 | break; |
| 224 | |
| 225 | case wxRGN_OR: |
| 226 | mode = RGN_OR; |
| 227 | break; |
| 228 | |
| 229 | case wxRGN_XOR: |
| 230 | mode = RGN_XOR; |
| 231 | break; |
| 232 | |
| 233 | case wxRGN_DIFF: |
| 234 | mode = RGN_DIFF; |
| 235 | break; |
| 236 | |
| 237 | default: |
| 238 | wxFAIL_MSG( _T("unknown region operation") ); |
| 239 | // fall through |
| 240 | |
| 241 | case wxRGN_COPY: |
| 242 | mode = RGN_COPY; |
| 243 | break; |
| 244 | } |
| 245 | |
| 246 | if ( ::CombineRgn(M_REGION, M_REGION, M_REGION_OF(rgn), mode) == ERROR ) |
| 247 | { |
| 248 | wxLogLastError(_T("CombineRgn")); |
| 249 | |
| 250 | return false; |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | return true; |
| 255 | } |
| 256 | |
| 257 | // ---------------------------------------------------------------------------- |
| 258 | // wxRegion bounding box |
| 259 | // ---------------------------------------------------------------------------- |
| 260 | |
| 261 | // Outer bounds of region |
| 262 | bool wxRegion::DoGetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const |
| 263 | { |
| 264 | if (m_refData) |
| 265 | { |
| 266 | RECT rect; |
| 267 | ::GetRgnBox(M_REGION, & rect); |
| 268 | x = rect.left; |
| 269 | y = rect.top; |
| 270 | w = rect.right - rect.left; |
| 271 | h = rect.bottom - rect.top; |
| 272 | |
| 273 | return true; |
| 274 | } |
| 275 | else |
| 276 | { |
| 277 | x = y = w = h = 0; |
| 278 | |
| 279 | return false; |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | // Is region empty? |
| 284 | bool wxRegion::IsEmpty() const |
| 285 | { |
| 286 | wxCoord x, y, w, h; |
| 287 | GetBox(x, y, w, h); |
| 288 | |
| 289 | return (w == 0) && (h == 0); |
| 290 | } |
| 291 | |
| 292 | bool wxRegion::DoIsEqual(const wxRegion& region) const |
| 293 | { |
| 294 | return ::EqualRgn(M_REGION, M_REGION_OF(region)) != 0; |
| 295 | } |
| 296 | |
| 297 | // ---------------------------------------------------------------------------- |
| 298 | // wxRegion hit testing |
| 299 | // ---------------------------------------------------------------------------- |
| 300 | |
| 301 | // Does the region contain the point (x,y)? |
| 302 | wxRegionContain wxRegion::DoContainsPoint(wxCoord x, wxCoord y) const |
| 303 | { |
| 304 | if (!m_refData) |
| 305 | return wxOutRegion; |
| 306 | |
| 307 | return ::PtInRegion(M_REGION, (int) x, (int) y) ? wxInRegion : wxOutRegion; |
| 308 | } |
| 309 | |
| 310 | // Does the region contain the rectangle (x, y, w, h)? |
| 311 | wxRegionContain wxRegion::DoContainsRect(const wxRect& rect) const |
| 312 | { |
| 313 | if (!m_refData) |
| 314 | return wxOutRegion; |
| 315 | |
| 316 | RECT rc; |
| 317 | wxCopyRectToRECT(rect, rc); |
| 318 | |
| 319 | return ::RectInRegion(M_REGION, &rc) ? wxInRegion : wxOutRegion; |
| 320 | } |
| 321 | |
| 322 | // Get internal region handle |
| 323 | WXHRGN wxRegion::GetHRGN() const |
| 324 | { |
| 325 | return (WXHRGN)(m_refData ? M_REGION : 0); |
| 326 | } |
| 327 | |
| 328 | // ============================================================================ |
| 329 | // wxRegionIterator implementation |
| 330 | // ============================================================================ |
| 331 | |
| 332 | // ---------------------------------------------------------------------------- |
| 333 | // wxRegionIterator ctors/dtor |
| 334 | // ---------------------------------------------------------------------------- |
| 335 | |
| 336 | void wxRegionIterator::Init() |
| 337 | { |
| 338 | m_current = |
| 339 | m_numRects = 0; |
| 340 | |
| 341 | m_rects = NULL; |
| 342 | } |
| 343 | |
| 344 | wxRegionIterator::~wxRegionIterator() |
| 345 | { |
| 346 | delete [] m_rects; |
| 347 | } |
| 348 | |
| 349 | // Initialize iterator for region |
| 350 | wxRegionIterator::wxRegionIterator(const wxRegion& region) |
| 351 | { |
| 352 | m_rects = NULL; |
| 353 | |
| 354 | Reset(region); |
| 355 | } |
| 356 | |
| 357 | wxRegionIterator& wxRegionIterator::operator=(const wxRegionIterator& ri) |
| 358 | { |
| 359 | delete [] m_rects; |
| 360 | |
| 361 | m_current = ri.m_current; |
| 362 | m_numRects = ri.m_numRects; |
| 363 | if ( m_numRects ) |
| 364 | { |
| 365 | m_rects = new wxRect[m_numRects]; |
| 366 | for ( long n = 0; n < m_numRects; n++ ) |
| 367 | m_rects[n] = ri.m_rects[n]; |
| 368 | } |
| 369 | else |
| 370 | { |
| 371 | m_rects = NULL; |
| 372 | } |
| 373 | |
| 374 | return *this; |
| 375 | } |
| 376 | |
| 377 | // ---------------------------------------------------------------------------- |
| 378 | // wxRegionIterator operations |
| 379 | // ---------------------------------------------------------------------------- |
| 380 | |
| 381 | // Reset iterator for a new region. |
| 382 | void wxRegionIterator::Reset(const wxRegion& region) |
| 383 | { |
| 384 | m_current = 0; |
| 385 | m_region = region; |
| 386 | |
| 387 | if (m_rects) |
| 388 | { |
| 389 | delete[] m_rects; |
| 390 | |
| 391 | m_rects = NULL; |
| 392 | } |
| 393 | |
| 394 | if (m_region.Empty()) |
| 395 | m_numRects = 0; |
| 396 | else |
| 397 | { |
| 398 | DWORD noBytes = ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, 0, NULL); |
| 399 | RGNDATA *rgnData = (RGNDATA*) new char[noBytes]; |
| 400 | ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, noBytes, rgnData); |
| 401 | |
| 402 | RGNDATAHEADER* header = (RGNDATAHEADER*) rgnData; |
| 403 | |
| 404 | m_rects = new wxRect[header->nCount]; |
| 405 | |
| 406 | RECT* rect = (RECT*) ((char*)rgnData + sizeof(RGNDATAHEADER)); |
| 407 | size_t i; |
| 408 | for (i = 0; i < header->nCount; i++) |
| 409 | { |
| 410 | m_rects[i] = wxRect(rect->left, rect->top, |
| 411 | rect->right - rect->left, rect->bottom - rect->top); |
| 412 | rect ++; // Advances pointer by sizeof(RECT) |
| 413 | } |
| 414 | |
| 415 | m_numRects = header->nCount; |
| 416 | |
| 417 | delete[] (char*) rgnData; |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | wxRegionIterator& wxRegionIterator::operator++() |
| 422 | { |
| 423 | if (m_current < m_numRects) |
| 424 | ++m_current; |
| 425 | |
| 426 | return *this; |
| 427 | } |
| 428 | |
| 429 | wxRegionIterator wxRegionIterator::operator ++ (int) |
| 430 | { |
| 431 | wxRegionIterator tmp = *this; |
| 432 | if (m_current < m_numRects) |
| 433 | ++m_current; |
| 434 | |
| 435 | return tmp; |
| 436 | } |
| 437 | |
| 438 | // ---------------------------------------------------------------------------- |
| 439 | // wxRegionIterator accessors |
| 440 | // ---------------------------------------------------------------------------- |
| 441 | |
| 442 | wxCoord wxRegionIterator::GetX() const |
| 443 | { |
| 444 | wxCHECK_MSG( m_current < m_numRects, 0, _T("invalid wxRegionIterator") ); |
| 445 | |
| 446 | return m_rects[m_current].x; |
| 447 | } |
| 448 | |
| 449 | wxCoord wxRegionIterator::GetY() const |
| 450 | { |
| 451 | wxCHECK_MSG( m_current < m_numRects, 0, _T("invalid wxRegionIterator") ); |
| 452 | |
| 453 | return m_rects[m_current].y; |
| 454 | } |
| 455 | |
| 456 | wxCoord wxRegionIterator::GetW() const |
| 457 | { |
| 458 | wxCHECK_MSG( m_current < m_numRects, 0, _T("invalid wxRegionIterator") ); |
| 459 | |
| 460 | return m_rects[m_current].width; |
| 461 | } |
| 462 | |
| 463 | wxCoord wxRegionIterator::GetH() const |
| 464 | { |
| 465 | wxCHECK_MSG( m_current < m_numRects, 0, _T("invalid wxRegionIterator") ); |
| 466 | |
| 467 | return m_rects[m_current].height; |
| 468 | } |