| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: msw/region.cpp |
| 3 | // Purpose: Region handling for wxWindows/X11 |
| 4 | // Author: Markus Holzem |
| 5 | // Modified by: |
| 6 | // Created: Fri Oct 24 10:46:34 MET 1997 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 1997 Julian Smart and Markus Holzem |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifdef __GNUG__ |
| 13 | #pragma implementation "region.h" |
| 14 | #endif |
| 15 | |
| 16 | // For compilers that support precompilation, includes "wx.h". |
| 17 | #include "wx/wxprec.h" |
| 18 | |
| 19 | #ifdef __BORLANDC__ |
| 20 | #pragma hdrstop |
| 21 | #endif |
| 22 | |
| 23 | #include "wx/msw/region.h" |
| 24 | #include "wx/gdicmn.h" |
| 25 | |
| 26 | #include "wx/window.h" |
| 27 | #include "wx/msw/private.h" |
| 28 | |
| 29 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject) |
| 30 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject) |
| 31 | |
| 32 | //----------------------------------------------------------------------------- |
| 33 | // wxRegionRefData implementation |
| 34 | //----------------------------------------------------------------------------- |
| 35 | |
| 36 | class WXDLLEXPORT wxRegionRefData : public wxGDIRefData |
| 37 | { |
| 38 | public: |
| 39 | wxRegionRefData() |
| 40 | { |
| 41 | m_region = 0; |
| 42 | } |
| 43 | |
| 44 | wxRegionRefData(const wxRegionRefData& data) |
| 45 | { |
| 46 | #if defined(__WIN32__) && !defined(__WXMICROWIN__) |
| 47 | DWORD noBytes = ::GetRegionData(data.m_region, 0, NULL); |
| 48 | RGNDATA *rgnData = (RGNDATA*) new char[noBytes]; |
| 49 | ::GetRegionData(data.m_region, noBytes, rgnData); |
| 50 | m_region = ::ExtCreateRegion(NULL, noBytes, rgnData); |
| 51 | delete[] (char*) rgnData; |
| 52 | #else |
| 53 | RECT rect; |
| 54 | ::GetRgnBox(data.m_region, &rect); |
| 55 | m_region = ::CreateRectRgnIndirect(&rect); |
| 56 | #endif |
| 57 | } |
| 58 | |
| 59 | ~wxRegionRefData() |
| 60 | { |
| 61 | ::DeleteObject(m_region); |
| 62 | m_region = 0; |
| 63 | } |
| 64 | |
| 65 | HRGN m_region; |
| 66 | }; |
| 67 | |
| 68 | #define M_REGION (((wxRegionRefData*)m_refData)->m_region) |
| 69 | |
| 70 | //----------------------------------------------------------------------------- |
| 71 | // wxRegion |
| 72 | //----------------------------------------------------------------------------- |
| 73 | |
| 74 | /* |
| 75 | * Create an empty region. |
| 76 | */ |
| 77 | wxRegion::wxRegion() |
| 78 | { |
| 79 | m_refData = (wxRegionRefData *)NULL; |
| 80 | } |
| 81 | |
| 82 | wxRegion::wxRegion(WXHRGN hRegion) |
| 83 | { |
| 84 | m_refData = new wxRegionRefData; |
| 85 | M_REGION = (HRGN) hRegion; |
| 86 | } |
| 87 | |
| 88 | wxRegion::wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h) |
| 89 | { |
| 90 | m_refData = new wxRegionRefData; |
| 91 | M_REGION = ::CreateRectRgn(x, y, x + w, y + h); |
| 92 | } |
| 93 | |
| 94 | wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight) |
| 95 | { |
| 96 | m_refData = new wxRegionRefData; |
| 97 | M_REGION = ::CreateRectRgn(topLeft.x, topLeft.y, bottomRight.x, bottomRight.y); |
| 98 | } |
| 99 | |
| 100 | wxRegion::wxRegion(const wxRect& rect) |
| 101 | { |
| 102 | m_refData = new wxRegionRefData; |
| 103 | M_REGION = ::CreateRectRgn(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height); |
| 104 | } |
| 105 | |
| 106 | wxRegion::wxRegion(size_t n, const wxPoint *points, int fillStyle) |
| 107 | { |
| 108 | m_refData = new wxRegionRefData; |
| 109 | M_REGION = ::CreatePolygonRgn |
| 110 | ( |
| 111 | (POINT*)points, |
| 112 | n, |
| 113 | fillStyle == wxODDEVEN_RULE ? ALTERNATE : WINDING |
| 114 | ); |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * Destroy the region. |
| 119 | */ |
| 120 | wxRegion::~wxRegion() |
| 121 | { |
| 122 | // m_refData unrefed in ~wxObject |
| 123 | } |
| 124 | |
| 125 | //----------------------------------------------------------------------------- |
| 126 | // Modify region |
| 127 | //----------------------------------------------------------------------------- |
| 128 | |
| 129 | // Clear current region |
| 130 | void wxRegion::Clear() |
| 131 | { |
| 132 | UnRef(); |
| 133 | } |
| 134 | |
| 135 | // Combine rectangle (x, y, w, h) with this. |
| 136 | bool wxRegion::Combine(wxCoord x, wxCoord y, wxCoord width, wxCoord height, wxRegionOp op) |
| 137 | { |
| 138 | // Don't change shared data |
| 139 | if (!m_refData) { |
| 140 | m_refData = new wxRegionRefData(); |
| 141 | } else if (m_refData->GetRefCount() > 1) { |
| 142 | wxRegionRefData* ref = (wxRegionRefData*)m_refData; |
| 143 | UnRef(); |
| 144 | m_refData = new wxRegionRefData(*ref); |
| 145 | } |
| 146 | // If ref count is 1, that means it's 'ours' anyway so no action. |
| 147 | |
| 148 | HRGN rectRegion = ::CreateRectRgn(x, y, x + width, y + height); |
| 149 | |
| 150 | int mode = 0; |
| 151 | switch (op) |
| 152 | { |
| 153 | case wxRGN_AND: mode = RGN_AND; break ; |
| 154 | case wxRGN_OR: mode = RGN_OR; break ; |
| 155 | case wxRGN_XOR: mode = RGN_XOR; break ; |
| 156 | case wxRGN_DIFF: mode = RGN_DIFF; break ; |
| 157 | case wxRGN_COPY: |
| 158 | default: |
| 159 | mode = RGN_COPY; break ; |
| 160 | } |
| 161 | |
| 162 | bool success = (ERROR != ::CombineRgn(M_REGION, M_REGION, rectRegion, mode)); |
| 163 | |
| 164 | ::DeleteObject(rectRegion); |
| 165 | |
| 166 | return success; |
| 167 | } |
| 168 | |
| 169 | // Union /e region with this. |
| 170 | bool wxRegion::Combine(const wxRegion& region, wxRegionOp op) |
| 171 | { |
| 172 | if (region.Empty()) |
| 173 | return FALSE; |
| 174 | |
| 175 | // Don't change shared data |
| 176 | if (!m_refData) { |
| 177 | m_refData = new wxRegionRefData(); |
| 178 | } else if (m_refData->GetRefCount() > 1) { |
| 179 | wxRegionRefData* ref = (wxRegionRefData*)m_refData; |
| 180 | UnRef(); |
| 181 | m_refData = new wxRegionRefData(*ref); |
| 182 | } |
| 183 | |
| 184 | int mode = 0; |
| 185 | switch (op) |
| 186 | { |
| 187 | case wxRGN_AND: mode = RGN_AND; break ; |
| 188 | case wxRGN_OR: mode = RGN_OR; break ; |
| 189 | case wxRGN_XOR: mode = RGN_XOR; break ; |
| 190 | case wxRGN_DIFF: mode = RGN_DIFF; break ; |
| 191 | case wxRGN_COPY: |
| 192 | default: |
| 193 | mode = RGN_COPY; break ; |
| 194 | } |
| 195 | |
| 196 | return (ERROR != ::CombineRgn(M_REGION, M_REGION, ((wxRegionRefData*)region.m_refData)->m_region, mode)); |
| 197 | } |
| 198 | |
| 199 | bool wxRegion::Combine(const wxRect& rect, wxRegionOp op) |
| 200 | { |
| 201 | return Combine(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight(), op); |
| 202 | } |
| 203 | |
| 204 | //----------------------------------------------------------------------------- |
| 205 | // Information on region |
| 206 | //----------------------------------------------------------------------------- |
| 207 | |
| 208 | // Outer bounds of region |
| 209 | void wxRegion::GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const |
| 210 | { |
| 211 | if (m_refData) |
| 212 | { |
| 213 | RECT rect; |
| 214 | ::GetRgnBox(M_REGION, & rect); |
| 215 | x = rect.left; |
| 216 | y = rect.top; |
| 217 | w = rect.right - rect.left; |
| 218 | h = rect.bottom - rect.top; |
| 219 | } |
| 220 | else |
| 221 | { |
| 222 | x = y = w = h = 0; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | wxRect wxRegion::GetBox() const |
| 227 | { |
| 228 | wxCoord x, y, w, h; |
| 229 | GetBox(x, y, w, h); |
| 230 | return wxRect(x, y, w, h); |
| 231 | } |
| 232 | |
| 233 | // Is region empty? |
| 234 | bool wxRegion::Empty() const |
| 235 | { |
| 236 | wxCoord x, y, w, h; |
| 237 | GetBox(x, y, w, h); |
| 238 | |
| 239 | return (w == 0) && (h == 0); |
| 240 | } |
| 241 | |
| 242 | //----------------------------------------------------------------------------- |
| 243 | // Tests |
| 244 | //----------------------------------------------------------------------------- |
| 245 | |
| 246 | // Does the region contain the point (x,y)? |
| 247 | wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y) const |
| 248 | { |
| 249 | if (!m_refData) |
| 250 | return wxOutRegion; |
| 251 | |
| 252 | if (::PtInRegion(M_REGION, (int) x, (int) y)) |
| 253 | return wxInRegion; |
| 254 | else |
| 255 | return wxOutRegion; |
| 256 | } |
| 257 | |
| 258 | // Does the region contain the point pt? |
| 259 | wxRegionContain wxRegion::Contains(const wxPoint& pt) const |
| 260 | { |
| 261 | if (!m_refData) |
| 262 | return wxOutRegion; |
| 263 | |
| 264 | if (::PtInRegion(M_REGION, (int) pt.x, (int) pt.y)) |
| 265 | return wxInRegion; |
| 266 | else |
| 267 | return wxOutRegion; |
| 268 | } |
| 269 | |
| 270 | // Does the region contain the rectangle (x, y, w, h)? |
| 271 | wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const |
| 272 | { |
| 273 | if (!m_refData) |
| 274 | return wxOutRegion; |
| 275 | |
| 276 | RECT rect; |
| 277 | rect.left = x; |
| 278 | rect.top = y; |
| 279 | rect.right = x + w; |
| 280 | rect.bottom = y + h; |
| 281 | |
| 282 | if (::RectInRegion(M_REGION, & rect)) |
| 283 | return wxInRegion; |
| 284 | else |
| 285 | return wxOutRegion; |
| 286 | } |
| 287 | |
| 288 | // Does the region contain the rectangle rect |
| 289 | wxRegionContain wxRegion::Contains(const wxRect& rect) const |
| 290 | { |
| 291 | if (!m_refData) |
| 292 | return wxOutRegion; |
| 293 | |
| 294 | wxCoord x, y, w, h; |
| 295 | x = rect.x; |
| 296 | y = rect.y; |
| 297 | w = rect.GetWidth(); |
| 298 | h = rect.GetHeight(); |
| 299 | return Contains(x, y, w, h); |
| 300 | } |
| 301 | |
| 302 | // Get internal region handle |
| 303 | WXHRGN wxRegion::GetHRGN() const |
| 304 | { |
| 305 | if (!m_refData) |
| 306 | return (WXHRGN) 0; |
| 307 | return (WXHRGN) M_REGION; |
| 308 | } |
| 309 | |
| 310 | /////////////////////////////////////////////////////////////////////////////// |
| 311 | // // |
| 312 | // wxRegionIterator // |
| 313 | // // |
| 314 | /////////////////////////////////////////////////////////////////////////////// |
| 315 | |
| 316 | /* |
| 317 | * Initialize empty iterator |
| 318 | */ |
| 319 | wxRegionIterator::wxRegionIterator() : m_current(0), m_numRects(0), m_rects(NULL) |
| 320 | { |
| 321 | } |
| 322 | |
| 323 | wxRegionIterator::~wxRegionIterator() |
| 324 | { |
| 325 | if (m_rects) |
| 326 | delete[] m_rects; |
| 327 | } |
| 328 | |
| 329 | /* |
| 330 | * Initialize iterator for region |
| 331 | */ |
| 332 | wxRegionIterator::wxRegionIterator(const wxRegion& region) |
| 333 | { |
| 334 | m_rects = NULL; |
| 335 | |
| 336 | Reset(region); |
| 337 | } |
| 338 | |
| 339 | /* |
| 340 | * Reset iterator for a new /e region. |
| 341 | */ |
| 342 | void wxRegionIterator::Reset(const wxRegion& region) |
| 343 | { |
| 344 | m_current = 0; |
| 345 | m_region = region; |
| 346 | |
| 347 | if (m_rects) |
| 348 | delete[] m_rects; |
| 349 | |
| 350 | m_rects = NULL; |
| 351 | |
| 352 | if (m_region.Empty()) |
| 353 | m_numRects = 0; |
| 354 | else |
| 355 | { |
| 356 | #if defined(__WIN32__) |
| 357 | DWORD noBytes = ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, 0, NULL); |
| 358 | RGNDATA *rgnData = (RGNDATA*) new char[noBytes]; |
| 359 | ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, noBytes, rgnData); |
| 360 | |
| 361 | RGNDATAHEADER* header = (RGNDATAHEADER*) rgnData; |
| 362 | |
| 363 | m_rects = new wxRect[header->nCount]; |
| 364 | |
| 365 | RECT* rect = (RECT*) ((char*)rgnData + sizeof(RGNDATAHEADER)) ; |
| 366 | size_t i; |
| 367 | for (i = 0; i < header->nCount; i++) |
| 368 | { |
| 369 | m_rects[i] = wxRect(rect->left, rect->top, |
| 370 | rect->right - rect->left, rect->bottom - rect->top); |
| 371 | rect ++; // Advances pointer by sizeof(RECT) |
| 372 | } |
| 373 | |
| 374 | m_numRects = header->nCount; |
| 375 | |
| 376 | delete[] (char*) rgnData; |
| 377 | #else |
| 378 | RECT rect; |
| 379 | ::GetRgnBox(((wxRegionRefData*)region.m_refData)->m_region, &rect); |
| 380 | m_rects = new wxRect[1]; |
| 381 | m_rects[0].x = rect.left; |
| 382 | m_rects[0].y = rect.top; |
| 383 | m_rects[0].width = rect.right - rect.left; |
| 384 | m_rects[0].height = rect.bottom - rect.top; |
| 385 | |
| 386 | m_numRects = 1; |
| 387 | #endif |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | * Increment iterator. The rectangle returned is the one after the |
| 393 | * incrementation. |
| 394 | */ |
| 395 | void wxRegionIterator::operator ++ () |
| 396 | { |
| 397 | if (m_current < m_numRects) |
| 398 | ++m_current; |
| 399 | } |
| 400 | |
| 401 | /* |
| 402 | * Increment iterator. The rectangle returned is the one before the |
| 403 | * incrementation. |
| 404 | */ |
| 405 | void wxRegionIterator::operator ++ (int) |
| 406 | { |
| 407 | if (m_current < m_numRects) |
| 408 | ++m_current; |
| 409 | } |
| 410 | |
| 411 | wxCoord wxRegionIterator::GetX() const |
| 412 | { |
| 413 | if (m_current < m_numRects) |
| 414 | return m_rects[m_current].x; |
| 415 | return 0; |
| 416 | } |
| 417 | |
| 418 | wxCoord wxRegionIterator::GetY() const |
| 419 | { |
| 420 | if (m_current < m_numRects) |
| 421 | return m_rects[m_current].y; |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | wxCoord wxRegionIterator::GetW() const |
| 426 | { |
| 427 | if (m_current < m_numRects) |
| 428 | return m_rects[m_current].width ; |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | wxCoord wxRegionIterator::GetH() const |
| 433 | { |
| 434 | if (m_current < m_numRects) |
| 435 | return m_rects[m_current].height; |
| 436 | return 0; |
| 437 | } |
| 438 | |