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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 | #define M_REGION_OF(rgn) (((wxRegionRefData*)(rgn.m_refData))->m_region) | |
70 | ||
71 | //----------------------------------------------------------------------------- | |
72 | // wxRegion | |
73 | //----------------------------------------------------------------------------- | |
74 | ||
75 | /* | |
76 | * Create an empty region. | |
77 | */ | |
78 | wxRegion::wxRegion() | |
79 | { | |
80 | m_refData = (wxRegionRefData *)NULL; | |
81 | } | |
82 | ||
83 | wxRegion::wxRegion(WXHRGN hRegion) | |
84 | { | |
85 | m_refData = new wxRegionRefData; | |
86 | M_REGION = (HRGN) hRegion; | |
87 | } | |
88 | ||
89 | wxRegion::wxRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h) | |
90 | { | |
91 | m_refData = new wxRegionRefData; | |
92 | M_REGION = ::CreateRectRgn(x, y, x + w, y + h); | |
93 | } | |
94 | ||
95 | wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight) | |
96 | { | |
97 | m_refData = new wxRegionRefData; | |
98 | M_REGION = ::CreateRectRgn(topLeft.x, topLeft.y, bottomRight.x, bottomRight.y); | |
99 | } | |
100 | ||
101 | wxRegion::wxRegion(const wxRect& rect) | |
102 | { | |
103 | m_refData = new wxRegionRefData; | |
104 | M_REGION = ::CreateRectRgn(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height); | |
105 | } | |
106 | ||
107 | wxRegion::wxRegion(size_t n, const wxPoint *points, int fillStyle) | |
108 | { | |
109 | #ifdef __WXMICROWIN__ | |
110 | m_refData = NULL; | |
111 | M_REGION = NULL; | |
112 | #else | |
113 | m_refData = new wxRegionRefData; | |
114 | M_REGION = ::CreatePolygonRgn | |
115 | ( | |
116 | (POINT*)points, | |
117 | n, | |
118 | fillStyle == wxODDEVEN_RULE ? ALTERNATE : WINDING | |
119 | ); | |
120 | #endif | |
121 | } | |
122 | ||
123 | wxRegion::~wxRegion() | |
124 | { | |
125 | // m_refData unrefed in ~wxObject | |
126 | } | |
127 | ||
128 | wxObjectRefData *wxRegion::CreateRefData() const | |
129 | { | |
130 | return new wxRegionRefData; | |
131 | } | |
132 | ||
133 | wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const | |
134 | { | |
135 | return new wxRegionRefData(*(wxRegionRefData *)data); | |
136 | } | |
137 | ||
138 | //----------------------------------------------------------------------------- | |
139 | // Modify region | |
140 | //----------------------------------------------------------------------------- | |
141 | ||
142 | // Clear current region | |
143 | void wxRegion::Clear() | |
144 | { | |
145 | UnRef(); | |
146 | } | |
147 | ||
148 | bool wxRegion::Offset(wxCoord x, wxCoord y) | |
149 | { | |
150 | wxCHECK_MSG( M_REGION, FALSE, _T("invalid wxRegion") ); | |
151 | ||
152 | if ( !x && !y ) | |
153 | { | |
154 | // nothing to do | |
155 | return TRUE; | |
156 | } | |
157 | ||
158 | AllocExclusive(); | |
159 | ||
160 | if ( ::OffsetRgn(GetHrgn(), x, y) == ERROR ) | |
161 | { | |
162 | wxLogLastError(_T("OffsetRgn")); | |
163 | ||
164 | return FALSE; | |
165 | } | |
166 | ||
167 | return TRUE; | |
168 | } | |
169 | ||
170 | // combine another region with this one | |
171 | bool wxRegion::Combine(const wxRegion& rgn, wxRegionOp op) | |
172 | { | |
173 | // we can't use the API functions if we don't have a valid region handle | |
174 | if ( !m_refData ) | |
175 | { | |
176 | // combining with an empty/invalid region works differently depending | |
177 | // on the operation | |
178 | switch ( op ) | |
179 | { | |
180 | case wxRGN_COPY: | |
181 | case wxRGN_OR: | |
182 | case wxRGN_XOR: | |
183 | *this = rgn; | |
184 | break; | |
185 | ||
186 | default: | |
187 | wxFAIL_MSG( _T("unknown region operation") ); | |
188 | // fall through | |
189 | ||
190 | case wxRGN_AND: | |
191 | case wxRGN_DIFF: | |
192 | // leave empty/invalid | |
193 | return FALSE; | |
194 | } | |
195 | } | |
196 | else // we have a valid region | |
197 | { | |
198 | int mode; | |
199 | switch ( op ) | |
200 | { | |
201 | case wxRGN_AND: | |
202 | mode = RGN_AND; | |
203 | break; | |
204 | ||
205 | case wxRGN_OR: | |
206 | mode = RGN_OR; | |
207 | break; | |
208 | ||
209 | case wxRGN_XOR: | |
210 | mode = RGN_XOR; | |
211 | break; | |
212 | ||
213 | case wxRGN_DIFF: | |
214 | mode = RGN_DIFF; | |
215 | break; | |
216 | ||
217 | default: | |
218 | wxFAIL_MSG( _T("unknown region operation") ); | |
219 | // fall through | |
220 | ||
221 | case wxRGN_COPY: | |
222 | mode = RGN_COPY; | |
223 | break; | |
224 | } | |
225 | ||
226 | if ( ::CombineRgn(M_REGION, M_REGION, M_REGION_OF(rgn), mode) == ERROR ) | |
227 | { | |
228 | wxLogLastError(_T("CombineRgn")); | |
229 | ||
230 | return FALSE; | |
231 | } | |
232 | } | |
233 | ||
234 | return TRUE; | |
235 | } | |
236 | ||
237 | // Combine rectangle (x, y, w, h) with this. | |
238 | bool wxRegion::Combine(wxCoord x, wxCoord y, | |
239 | wxCoord width, wxCoord height, | |
240 | wxRegionOp op) | |
241 | { | |
242 | return Combine(wxRegion(x, y, width, height), op); | |
243 | } | |
244 | ||
245 | bool wxRegion::Combine(const wxRect& rect, wxRegionOp op) | |
246 | { | |
247 | return Combine(rect.GetLeft(), rect.GetTop(), | |
248 | rect.GetWidth(), rect.GetHeight(), op); | |
249 | } | |
250 | ||
251 | //----------------------------------------------------------------------------- | |
252 | // Information on region | |
253 | //----------------------------------------------------------------------------- | |
254 | ||
255 | // Outer bounds of region | |
256 | void wxRegion::GetBox(wxCoord& x, wxCoord& y, wxCoord&w, wxCoord &h) const | |
257 | { | |
258 | if (m_refData) | |
259 | { | |
260 | RECT rect; | |
261 | ::GetRgnBox(M_REGION, & rect); | |
262 | x = rect.left; | |
263 | y = rect.top; | |
264 | w = rect.right - rect.left; | |
265 | h = rect.bottom - rect.top; | |
266 | } | |
267 | else | |
268 | { | |
269 | x = y = w = h = 0; | |
270 | } | |
271 | } | |
272 | ||
273 | wxRect wxRegion::GetBox() const | |
274 | { | |
275 | wxCoord x, y, w, h; | |
276 | GetBox(x, y, w, h); | |
277 | return wxRect(x, y, w, h); | |
278 | } | |
279 | ||
280 | // Is region empty? | |
281 | bool wxRegion::Empty() const | |
282 | { | |
283 | wxCoord x, y, w, h; | |
284 | GetBox(x, y, w, h); | |
285 | ||
286 | return (w == 0) && (h == 0); | |
287 | } | |
288 | ||
289 | //----------------------------------------------------------------------------- | |
290 | // Tests | |
291 | //----------------------------------------------------------------------------- | |
292 | ||
293 | // Does the region contain the point (x,y)? | |
294 | wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y) const | |
295 | { | |
296 | if (!m_refData) | |
297 | return wxOutRegion; | |
298 | ||
299 | if (::PtInRegion(M_REGION, (int) x, (int) y)) | |
300 | return wxInRegion; | |
301 | else | |
302 | return wxOutRegion; | |
303 | } | |
304 | ||
305 | // Does the region contain the point pt? | |
306 | wxRegionContain wxRegion::Contains(const wxPoint& pt) const | |
307 | { | |
308 | if (!m_refData) | |
309 | return wxOutRegion; | |
310 | ||
311 | if (::PtInRegion(M_REGION, (int) pt.x, (int) pt.y)) | |
312 | return wxInRegion; | |
313 | else | |
314 | return wxOutRegion; | |
315 | } | |
316 | ||
317 | // Does the region contain the rectangle (x, y, w, h)? | |
318 | wxRegionContain wxRegion::Contains(wxCoord x, wxCoord y, wxCoord w, wxCoord h) const | |
319 | { | |
320 | if (!m_refData) | |
321 | return wxOutRegion; | |
322 | ||
323 | RECT rect; | |
324 | rect.left = x; | |
325 | rect.top = y; | |
326 | rect.right = x + w; | |
327 | rect.bottom = y + h; | |
328 | ||
329 | if (::RectInRegion(M_REGION, & rect)) | |
330 | return wxInRegion; | |
331 | else | |
332 | return wxOutRegion; | |
333 | } | |
334 | ||
335 | // Does the region contain the rectangle rect | |
336 | wxRegionContain wxRegion::Contains(const wxRect& rect) const | |
337 | { | |
338 | if (!m_refData) | |
339 | return wxOutRegion; | |
340 | ||
341 | wxCoord x, y, w, h; | |
342 | x = rect.x; | |
343 | y = rect.y; | |
344 | w = rect.GetWidth(); | |
345 | h = rect.GetHeight(); | |
346 | return Contains(x, y, w, h); | |
347 | } | |
348 | ||
349 | // Get internal region handle | |
350 | WXHRGN wxRegion::GetHRGN() const | |
351 | { | |
352 | if (!m_refData) | |
353 | return (WXHRGN) 0; | |
354 | return (WXHRGN) M_REGION; | |
355 | } | |
356 | ||
357 | /////////////////////////////////////////////////////////////////////////////// | |
358 | // // | |
359 | // wxRegionIterator // | |
360 | // // | |
361 | /////////////////////////////////////////////////////////////////////////////// | |
362 | ||
363 | /* | |
364 | * Initialize empty iterator | |
365 | */ | |
366 | wxRegionIterator::wxRegionIterator() : m_current(0), m_numRects(0), m_rects(NULL) | |
367 | { | |
368 | } | |
369 | ||
370 | wxRegionIterator::~wxRegionIterator() | |
371 | { | |
372 | if (m_rects) | |
373 | delete[] m_rects; | |
374 | } | |
375 | ||
376 | /* | |
377 | * Initialize iterator for region | |
378 | */ | |
379 | wxRegionIterator::wxRegionIterator(const wxRegion& region) | |
380 | { | |
381 | m_rects = NULL; | |
382 | ||
383 | Reset(region); | |
384 | } | |
385 | ||
386 | /* | |
387 | * Reset iterator for a new /e region. | |
388 | */ | |
389 | void wxRegionIterator::Reset(const wxRegion& region) | |
390 | { | |
391 | m_current = 0; | |
392 | m_region = region; | |
393 | ||
394 | if (m_rects) | |
395 | delete[] m_rects; | |
396 | ||
397 | m_rects = NULL; | |
398 | ||
399 | if (m_region.Empty()) | |
400 | m_numRects = 0; | |
401 | else | |
402 | { | |
403 | #if defined(__WIN32__) | |
404 | DWORD noBytes = ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, 0, NULL); | |
405 | RGNDATA *rgnData = (RGNDATA*) new char[noBytes]; | |
406 | ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, noBytes, rgnData); | |
407 | ||
408 | RGNDATAHEADER* header = (RGNDATAHEADER*) rgnData; | |
409 | ||
410 | m_rects = new wxRect[header->nCount]; | |
411 | ||
412 | RECT* rect = (RECT*) ((char*)rgnData + sizeof(RGNDATAHEADER)); | |
413 | size_t i; | |
414 | for (i = 0; i < header->nCount; i++) | |
415 | { | |
416 | m_rects[i] = wxRect(rect->left, rect->top, | |
417 | rect->right - rect->left, rect->bottom - rect->top); | |
418 | rect ++; // Advances pointer by sizeof(RECT) | |
419 | } | |
420 | ||
421 | m_numRects = header->nCount; | |
422 | ||
423 | delete[] (char*) rgnData; | |
424 | #else | |
425 | RECT rect; | |
426 | ::GetRgnBox(((wxRegionRefData*)region.m_refData)->m_region, &rect); | |
427 | m_rects = new wxRect[1]; | |
428 | m_rects[0].x = rect.left; | |
429 | m_rects[0].y = rect.top; | |
430 | m_rects[0].width = rect.right - rect.left; | |
431 | m_rects[0].height = rect.bottom - rect.top; | |
432 | ||
433 | m_numRects = 1; | |
434 | #endif | |
435 | } | |
436 | } | |
437 | ||
438 | /* | |
439 | * Increment iterator. The rectangle returned is the one after the | |
440 | * incrementation. | |
441 | */ | |
442 | void wxRegionIterator::operator ++ () | |
443 | { | |
444 | if (m_current < m_numRects) | |
445 | ++m_current; | |
446 | } | |
447 | ||
448 | /* | |
449 | * Increment iterator. The rectangle returned is the one before the | |
450 | * incrementation. | |
451 | */ | |
452 | void wxRegionIterator::operator ++ (int) | |
453 | { | |
454 | if (m_current < m_numRects) | |
455 | ++m_current; | |
456 | } | |
457 | ||
458 | wxCoord wxRegionIterator::GetX() const | |
459 | { | |
460 | if (m_current < m_numRects) | |
461 | return m_rects[m_current].x; | |
462 | return 0; | |
463 | } | |
464 | ||
465 | wxCoord wxRegionIterator::GetY() const | |
466 | { | |
467 | if (m_current < m_numRects) | |
468 | return m_rects[m_current].y; | |
469 | return 0; | |
470 | } | |
471 | ||
472 | wxCoord wxRegionIterator::GetW() const | |
473 | { | |
474 | if (m_current < m_numRects) | |
475 | return m_rects[m_current].width; | |
476 | return 0; | |
477 | } | |
478 | ||
479 | wxCoord wxRegionIterator::GetH() const | |
480 | { | |
481 | if (m_current < m_numRects) | |
482 | return m_rects[m_current].height; | |
483 | return 0; | |
484 | } | |
485 |