| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: region.cpp |
| 3 | // Purpose: Region handling for wxWidgets/MGL |
| 4 | // Author: Vaclav Slavik |
| 5 | // RCS-ID: $Id$ |
| 6 | // Copyright: (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com) |
| 7 | // Licence: wxWindows licence |
| 8 | ///////////////////////////////////////////////////////////////////////////// |
| 9 | |
| 10 | #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) |
| 11 | #pragma implementation "region.h" |
| 12 | #endif |
| 13 | |
| 14 | // For compilers that support precompilation, includes "wx.h". |
| 15 | #include "wx/wxprec.h" |
| 16 | |
| 17 | #ifdef __BORLANDC__ |
| 18 | #pragma hdrstop |
| 19 | #endif |
| 20 | |
| 21 | #include "wx/region.h" |
| 22 | #include "wx/gdicmn.h" |
| 23 | #include "wx/thread.h" |
| 24 | #include "wx/module.h" |
| 25 | |
| 26 | #include <mgraph.hpp> |
| 27 | |
| 28 | #include "wx/listimpl.cpp" |
| 29 | WX_DEFINE_LIST(wxRegionRectList) |
| 30 | |
| 31 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject) |
| 32 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject) |
| 33 | |
| 34 | //----------------------------------------------------------------------------- |
| 35 | // wxRegionRefData implementation |
| 36 | //----------------------------------------------------------------------------- |
| 37 | |
| 38 | class WXDLLEXPORT wxRegionRefData : public wxGDIRefData |
| 39 | { |
| 40 | public: |
| 41 | wxRegionRefData() {} |
| 42 | |
| 43 | wxRegionRefData(const wxRegionRefData& data) |
| 44 | { |
| 45 | m_region = data.m_region; |
| 46 | } |
| 47 | |
| 48 | ~wxRegionRefData() {} |
| 49 | |
| 50 | MGLRegion m_region; |
| 51 | }; |
| 52 | |
| 53 | #define M_REGION (((wxRegionRefData*)m_refData)->m_region) |
| 54 | #define M_REGION_OF(r) (((wxRegionRefData*)(r.m_refData))->m_region) |
| 55 | |
| 56 | //----------------------------------------------------------------------------- |
| 57 | // wxRegion |
| 58 | //----------------------------------------------------------------------------- |
| 59 | |
| 60 | wxObjectRefData *wxRegion::CreateRefData() const |
| 61 | { |
| 62 | return new wxRegionRefData; |
| 63 | } |
| 64 | |
| 65 | wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const |
| 66 | { |
| 67 | return new wxRegionRefData(*(wxRegionRefData *)data); |
| 68 | } |
| 69 | |
| 70 | /* |
| 71 | * Create an empty region. |
| 72 | */ |
| 73 | wxRegion::wxRegion() |
| 74 | { |
| 75 | m_refData = NULL; |
| 76 | } |
| 77 | |
| 78 | wxRegion::wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h) |
| 79 | { |
| 80 | m_refData = new wxRegionRefData; |
| 81 | MGLRect rect(x, y, x + w, y + h); |
| 82 | M_REGION = rect; |
| 83 | } |
| 84 | |
| 85 | wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight) |
| 86 | { |
| 87 | m_refData = new wxRegionRefData; |
| 88 | MGLRect rect(topLeft.x, topLeft.y, bottomRight.x+1, bottomRight.y+1); |
| 89 | M_REGION = rect; |
| 90 | } |
| 91 | |
| 92 | wxRegion::wxRegion(const wxRect& r) |
| 93 | { |
| 94 | m_refData = new wxRegionRefData; |
| 95 | MGLRect rect(r.GetLeft(), r.GetTop(), r.GetRight()+1, r.GetBottom()+1); |
| 96 | M_REGION = rect; |
| 97 | } |
| 98 | |
| 99 | wxRegion::wxRegion(const MGLRegion& region) |
| 100 | { |
| 101 | m_refData = new wxRegionRefData; |
| 102 | M_REGION = region; |
| 103 | } |
| 104 | |
| 105 | wxRegion::~wxRegion() |
| 106 | { |
| 107 | // m_refData unrefed in ~wxObject |
| 108 | } |
| 109 | |
| 110 | const MGLRegion& wxRegion::GetMGLRegion() const |
| 111 | { |
| 112 | return M_REGION; |
| 113 | } |
| 114 | |
| 115 | //----------------------------------------------------------------------------- |
| 116 | // Modify region |
| 117 | //----------------------------------------------------------------------------- |
| 118 | |
| 119 | // Clear current region |
| 120 | void wxRegion::Clear() |
| 121 | { |
| 122 | UnRef(); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | //----------------------------------------------------------------------------- |
| 127 | // Information on region |
| 128 | //----------------------------------------------------------------------------- |
| 129 | |
| 130 | // Outer bounds of region |
| 131 | void wxRegion::GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const |
| 132 | { |
| 133 | if (m_refData) |
| 134 | { |
| 135 | rect_t rect; |
| 136 | rect = M_REGION.getBounds(); |
| 137 | x = rect.left; |
| 138 | y = rect.top; |
| 139 | w = rect.right - rect.left; |
| 140 | h = rect.bottom - rect.top; |
| 141 | } |
| 142 | else |
| 143 | { |
| 144 | x = y = w = h = 0; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | wxRect wxRegion::GetBox() const |
| 149 | { |
| 150 | wxCoord x, y, w, h; |
| 151 | GetBox(x, y, w, h); |
| 152 | return wxRect(x, y, w, h); |
| 153 | } |
| 154 | |
| 155 | // Is region empty? |
| 156 | bool wxRegion::Empty() const |
| 157 | { |
| 158 | if (!m_refData) return TRUE; |
| 159 | return M_REGION.isEmpty(); |
| 160 | } |
| 161 | |
| 162 | //----------------------------------------------------------------------------- |
| 163 | // Modifications |
| 164 | //----------------------------------------------------------------------------- |
| 165 | |
| 166 | bool wxRegion::Offset(wxCoord x, wxCoord y) |
| 167 | { |
| 168 | AllocExclusive(); |
| 169 | M_REGION.offset(x, y); |
| 170 | return TRUE; |
| 171 | } |
| 172 | |
| 173 | // Union rectangle or region with this. |
| 174 | bool wxRegion::Union(wxCoord x, wxCoord y, wxCoord width, wxCoord height) |
| 175 | { |
| 176 | AllocExclusive(); |
| 177 | M_REGION += MGLRect(x, y, x + width, y + height); |
| 178 | return TRUE; |
| 179 | } |
| 180 | |
| 181 | bool wxRegion::Union(const wxRegion& region) |
| 182 | { |
| 183 | AllocExclusive(); |
| 184 | M_REGION += M_REGION_OF(region); |
| 185 | return TRUE; |
| 186 | } |
| 187 | |
| 188 | // Intersect rectangle or region with this. |
| 189 | bool wxRegion::Intersect(wxCoord x, wxCoord y, wxCoord width, wxCoord height) |
| 190 | { |
| 191 | AllocExclusive(); |
| 192 | M_REGION &= MGLRect(x, y, x + width, y + height); |
| 193 | return TRUE; |
| 194 | } |
| 195 | |
| 196 | bool wxRegion::Intersect(const wxRegion& region) |
| 197 | { |
| 198 | AllocExclusive(); |
| 199 | M_REGION &= M_REGION_OF(region); |
| 200 | return TRUE; |
| 201 | } |
| 202 | |
| 203 | // Subtract rectangle or region from this: |
| 204 | // Combines the parts of 'this' that are not part of the second region. |
| 205 | bool wxRegion::Subtract(wxCoord x, wxCoord y, wxCoord width, wxCoord height) |
| 206 | { |
| 207 | AllocExclusive(); |
| 208 | M_REGION -= MGLRect(x, y, x + width, y + height); |
| 209 | return TRUE; |
| 210 | } |
| 211 | |
| 212 | bool wxRegion::Subtract(const wxRegion& region) |
| 213 | { |
| 214 | AllocExclusive(); |
| 215 | M_REGION -= M_REGION_OF(region); |
| 216 | return TRUE; |
| 217 | } |
| 218 | |
| 219 | // XOR: the union of two combined regions except for any overlapping areas. |
| 220 | bool wxRegion::Xor(wxCoord x, wxCoord y, wxCoord width, wxCoord height) |
| 221 | { |
| 222 | AllocExclusive(); |
| 223 | MGLRect rect(x, y, x + width, y + height); |
| 224 | MGLRegion rg1 = M_REGION + rect, |
| 225 | rg2 = M_REGION & rect; |
| 226 | M_REGION = rg1 - rg2; |
| 227 | return TRUE; |
| 228 | } |
| 229 | |
| 230 | bool wxRegion::Xor(const wxRegion& region) |
| 231 | { |
| 232 | AllocExclusive(); |
| 233 | MGLRegion rg1 = M_REGION + M_REGION_OF(region), |
| 234 | rg2 = M_REGION & M_REGION_OF(region); |
| 235 | M_REGION = rg1 - rg2; |
| 236 | return TRUE; |
| 237 | } |
| 238 | |
| 239 | |
| 240 | //----------------------------------------------------------------------------- |
| 241 | // Tests |
| 242 | //----------------------------------------------------------------------------- |
| 243 | |
| 244 | // Does the region contain the point (x,y)? |
| 245 | wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y) const |
| 246 | { |
| 247 | if (!m_refData) |
| 248 | return wxOutRegion; |
| 249 | |
| 250 | if (M_REGION.includes((int)x, (int)y)) |
| 251 | return wxInRegion; |
| 252 | else |
| 253 | return wxOutRegion; |
| 254 | } |
| 255 | |
| 256 | // Does the region contain the point pt? |
| 257 | wxRegionContain wxRegion::Contains(const wxPoint& pt) const |
| 258 | { |
| 259 | return Contains(pt.x, pt.y); |
| 260 | } |
| 261 | |
| 262 | // Does the region contain the rectangle (x, y, w, h)? |
| 263 | wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const |
| 264 | { |
| 265 | if (!m_refData) |
| 266 | return wxOutRegion; |
| 267 | |
| 268 | MGLRect rect(x, y, x + w, y + h); |
| 269 | MGLRegion rg; |
| 270 | |
| 271 | // 1) is the rectangle entirely covered by the region? |
| 272 | rg = MGLRegion(rect) - M_REGION; |
| 273 | if (rg.isEmpty()) return wxInRegion; |
| 274 | |
| 275 | // 2) is the rectangle completely outside the region? |
| 276 | rg = M_REGION & rect; // intersection |
| 277 | if (rg.isEmpty()) return wxOutRegion; |
| 278 | |
| 279 | // 3) neither case happened => it is partially covered: |
| 280 | return wxPartRegion; |
| 281 | } |
| 282 | |
| 283 | // Does the region contain the rectangle rect |
| 284 | wxRegionContain wxRegion::Contains(const wxRect& rect) const |
| 285 | { |
| 286 | return Contains(rect.x, rect.y, rect.width, rect.height); |
| 287 | } |
| 288 | |
| 289 | |
| 290 | /////////////////////////////////////////////////////////////////////////////// |
| 291 | // wxRegionIterator // |
| 292 | /////////////////////////////////////////////////////////////////////////////// |
| 293 | |
| 294 | #if wxUSE_THREADS |
| 295 | static wxMutex *gs_mutexIterator; |
| 296 | |
| 297 | class wxMglRegionModule : public wxModule |
| 298 | { |
| 299 | public: |
| 300 | virtual bool OnInit() |
| 301 | { |
| 302 | gs_mutexIterator = new wxMutex(); |
| 303 | return TRUE; |
| 304 | } |
| 305 | virtual void OnExit() |
| 306 | { |
| 307 | wxDELETE(gs_mutexIterator); |
| 308 | } |
| 309 | |
| 310 | DECLARE_DYNAMIC_CLASS(wxMglRegionModule) |
| 311 | }; |
| 312 | IMPLEMENT_DYNAMIC_CLASS(wxMglRegionModule, wxModule) |
| 313 | #endif |
| 314 | |
| 315 | /* |
| 316 | * Initialize empty iterator |
| 317 | */ |
| 318 | wxRegionIterator::wxRegionIterator() : m_currentNode(NULL) |
| 319 | { |
| 320 | m_rects.DeleteContents(TRUE); |
| 321 | } |
| 322 | |
| 323 | wxRegionIterator::~wxRegionIterator() |
| 324 | { |
| 325 | } |
| 326 | |
| 327 | /* |
| 328 | * Initialize iterator for region |
| 329 | */ |
| 330 | wxRegionIterator::wxRegionIterator(const wxRegion& region) |
| 331 | { |
| 332 | m_rects.DeleteContents(TRUE); |
| 333 | Reset(region); |
| 334 | } |
| 335 | |
| 336 | /* |
| 337 | * Reset iterator for a new /e region. |
| 338 | */ |
| 339 | |
| 340 | |
| 341 | static wxRegionRectList *gs_rectList; |
| 342 | |
| 343 | static void MGLAPI wxMGL_region_callback(const rect_t *r) |
| 344 | { |
| 345 | gs_rectList->Append(new wxRect(r->left, r->top, |
| 346 | r->right - r->left, r->bottom - r->top)); |
| 347 | } |
| 348 | |
| 349 | void wxRegionIterator::Reset(const wxRegion& region) |
| 350 | { |
| 351 | m_currentNode = NULL; |
| 352 | m_rects.Clear(); |
| 353 | |
| 354 | if (!region.Empty()) |
| 355 | { |
| 356 | #if wxUSE_THREADS |
| 357 | wxMutexLocker(*gs_mutexIterator); |
| 358 | #endif |
| 359 | gs_rectList = &m_rects; |
| 360 | M_REGION_OF(region).traverse(wxMGL_region_callback); |
| 361 | m_currentNode = m_rects.GetFirst(); |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | * Increment iterator. The rectangle returned is the one after the |
| 367 | * incrementation. |
| 368 | */ |
| 369 | void wxRegionIterator::operator ++ () |
| 370 | { |
| 371 | if (m_currentNode) |
| 372 | m_currentNode = m_currentNode->GetNext(); |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * Increment iterator. The rectangle returned is the one before the |
| 377 | * incrementation. |
| 378 | */ |
| 379 | void wxRegionIterator::operator ++ (int) |
| 380 | { |
| 381 | if (m_currentNode) |
| 382 | m_currentNode = m_currentNode->GetNext(); |
| 383 | } |
| 384 | |
| 385 | wxCoord wxRegionIterator::GetX() const |
| 386 | { |
| 387 | if (m_currentNode) |
| 388 | return m_currentNode->GetData()->x; |
| 389 | else |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | wxCoord wxRegionIterator::GetY() const |
| 394 | { |
| 395 | if (m_currentNode) |
| 396 | return m_currentNode->GetData()->y; |
| 397 | else |
| 398 | return 0; |
| 399 | } |
| 400 | |
| 401 | wxCoord wxRegionIterator::GetW() const |
| 402 | { |
| 403 | if (m_currentNode) |
| 404 | return m_currentNode->GetData()->width; |
| 405 | else |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | wxCoord wxRegionIterator::GetH() const |
| 410 | { |
| 411 | if (m_currentNode) |
| 412 | return m_currentNode->GetData()->height; |
| 413 | else |
| 414 | return 0; |
| 415 | } |