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