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1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // File: region.cpp | |
3 | // Purpose: Region handling for wxWindows/X11 | |
4 | // Author: Markus Holzem | |
5 | // Created: Fri Oct 24 10:46:34 MET 1997 | |
6 | // RCS-ID: $Id$ | |
7 | // Copyright: (c) 1997 Julian Smart and Markus Holzem | |
8 | // Licence: wxWindows licence | |
9 | ///////////////////////////////////////////////////////////////////////////// | |
10 | ||
11 | #ifdef __GNUG__ | |
12 | #pragma implementation "region.h" | |
13 | #endif | |
14 | ||
15 | #include "wx/wxprec.h" | |
16 | ||
17 | #ifdef __BORLANDC__ | |
18 | #pragma hdrstop | |
19 | #endif | |
20 | ||
21 | #include "wx/msw/region.h" | |
22 | #include "wx/gdicmn.h" | |
23 | ||
24 | #include <windows.h> | |
25 | ||
26 | #if !USE_SHARED_LIBRARY | |
27 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject) | |
28 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject) | |
29 | #endif | |
30 | ||
31 | //----------------------------------------------------------------------------- | |
32 | // wxRegionRefData implementation | |
33 | //----------------------------------------------------------------------------- | |
34 | ||
35 | class WXDLLEXPORT wxRegionRefData : public wxGDIRefData { | |
36 | public: | |
37 | wxRegionRefData(void) | |
38 | { | |
b823f5a1 | 39 | m_region = 0; |
2bda0e17 KB |
40 | } |
41 | ||
42 | wxRegionRefData(const wxRegionRefData& data) | |
43 | { | |
44 | #if defined(__WIN32__) | |
45 | DWORD noBytes = ::GetRegionData(data.m_region, 0, NULL); | |
46 | RGNDATA *rgnData = (RGNDATA*) new char[noBytes]; | |
47 | ::GetRegionData(data.m_region, noBytes, rgnData); | |
48 | m_region = ::ExtCreateRegion(NULL, noBytes, rgnData); | |
49 | delete[] (char*) rgnData; | |
50 | #else | |
51 | RECT rect; | |
52 | ::GetRgnBox(data.m_region, &rect); | |
53 | m_region = ::CreateRectRgnIndirect(&rect); | |
54 | #endif | |
55 | } | |
56 | ||
57 | ~wxRegionRefData(void) | |
58 | { | |
59 | ::DeleteObject(m_region); | |
60 | m_region = 0; | |
61 | } | |
62 | ||
63 | HRGN m_region; | |
64 | }; | |
65 | ||
66 | #define M_REGION (((wxRegionRefData*)m_refData)->m_region) | |
67 | ||
68 | //----------------------------------------------------------------------------- | |
69 | // wxRegion | |
70 | //----------------------------------------------------------------------------- | |
71 | ||
72 | /*! | |
73 | * Create an empty region. | |
74 | */ | |
75 | wxRegion::wxRegion(void) | |
76 | { | |
77 | m_refData = new wxRegionRefData; | |
78 | M_REGION = ::CreateRectRgn(0, 0, 0, 0); | |
79 | } | |
80 | ||
81d66cf3 JS |
81 | wxRegion::wxRegion(WXHRGN hRegion) |
82 | { | |
83 | m_refData = new wxRegionRefData; | |
84 | M_REGION = (HRGN) hRegion; | |
85 | } | |
86 | ||
2bda0e17 KB |
87 | wxRegion::wxRegion(long x, long y, long w, long h) |
88 | { | |
89 | m_refData = new wxRegionRefData; | |
90 | M_REGION = ::CreateRectRgn(x, y, x + w, y + h); | |
91 | } | |
92 | ||
93 | wxRegion::wxRegion(const wxPoint& topLeft, const wxPoint& bottomRight) | |
94 | { | |
95 | m_refData = new wxRegionRefData; | |
96 | M_REGION = ::CreateRectRgn(topLeft.x, topLeft.y, bottomRight.x, bottomRight.y); | |
97 | } | |
98 | ||
99 | wxRegion::wxRegion(const wxRect& rect) | |
100 | { | |
101 | m_refData = new wxRegionRefData; | |
102 | M_REGION = ::CreateRectRgn(rect.GetLeft(), rect.GetTop(), rect.GetRight(), rect.GetBottom()); | |
103 | } | |
104 | ||
105 | /*! | |
106 | * Destroy the region. | |
107 | */ | |
108 | wxRegion::~wxRegion(void) | |
109 | { | |
110 | // m_refData unrefed in ~wxObject | |
111 | } | |
112 | ||
113 | //----------------------------------------------------------------------------- | |
114 | //# Modify region | |
115 | //----------------------------------------------------------------------------- | |
116 | ||
117 | //! Clear current region | |
118 | void wxRegion::Clear(void) | |
119 | { | |
120 | UnRef(); | |
121 | } | |
122 | ||
123 | //! Combine rectangle (x, y, w, h) with this. | |
124 | bool wxRegion::Combine(long x, long y, long width, long height, wxRegionOp op) | |
125 | { | |
126 | // Don't change shared data | |
127 | if (!m_refData) { | |
128 | m_refData = new wxRegionRefData(); | |
129 | } else if (m_refData->GetRefCount() > 1) { | |
130 | wxRegionRefData* ref = (wxRegionRefData*)m_refData; | |
131 | UnRef(); | |
132 | m_refData = new wxRegionRefData(*ref); | |
133 | } | |
134 | // If ref count is 1, that means it's 'ours' anyway so no action. | |
135 | ||
136 | HRGN rectRegion = ::CreateRectRgn(x, y, x + width, y + height); | |
137 | ||
138 | int mode = 0; | |
139 | switch (op) | |
140 | { | |
141 | case wxRGN_AND: mode = RGN_AND; break ; | |
142 | case wxRGN_OR: mode = RGN_OR; break ; | |
143 | case wxRGN_XOR: mode = RGN_XOR; break ; | |
144 | case wxRGN_DIFF: mode = RGN_DIFF; break ; | |
145 | case wxRGN_COPY: | |
146 | default: | |
147 | mode = RGN_COPY; break ; | |
148 | } | |
149 | ||
150 | bool success = (ERROR != ::CombineRgn(M_REGION, M_REGION, rectRegion, mode)); | |
151 | ||
152 | ::DeleteObject(rectRegion); | |
153 | ||
154 | return success; | |
155 | } | |
156 | ||
157 | //! Union /e region with this. | |
158 | bool wxRegion::Combine(const wxRegion& region, wxRegionOp op) | |
159 | { | |
160 | if (region.Empty()) | |
161 | return FALSE; | |
162 | ||
163 | // Don't change shared data | |
164 | if (!m_refData) { | |
165 | m_refData = new wxRegionRefData(); | |
166 | } else if (m_refData->GetRefCount() > 1) { | |
167 | wxRegionRefData* ref = (wxRegionRefData*)m_refData; | |
168 | UnRef(); | |
169 | m_refData = new wxRegionRefData(*ref); | |
170 | } | |
171 | ||
172 | int mode = 0; | |
173 | switch (op) | |
174 | { | |
175 | case wxRGN_AND: mode = RGN_AND; break ; | |
176 | case wxRGN_OR: mode = RGN_OR; break ; | |
177 | case wxRGN_XOR: mode = RGN_XOR; break ; | |
178 | case wxRGN_DIFF: mode = RGN_DIFF; break ; | |
179 | case wxRGN_COPY: | |
180 | default: | |
181 | mode = RGN_COPY; break ; | |
182 | } | |
183 | ||
184 | return (ERROR != ::CombineRgn(M_REGION, M_REGION, ((wxRegionRefData*)region.m_refData)->m_region, mode)); | |
185 | } | |
186 | ||
187 | bool wxRegion::Combine(const wxRect& rect, wxRegionOp op) | |
188 | { | |
189 | return Combine(rect.GetLeft(), rect.GetTop(), rect.GetWidth(), rect.GetHeight(), op); | |
190 | } | |
191 | ||
192 | //----------------------------------------------------------------------------- | |
193 | //# Information on region | |
194 | //----------------------------------------------------------------------------- | |
195 | ||
196 | // Outer bounds of region | |
197 | void wxRegion::GetBox(long& x, long& y, long&w, long &h) const | |
198 | { | |
199 | if (m_refData) { | |
200 | RECT rect; | |
201 | ::GetRgnBox(M_REGION, & rect); | |
202 | x = rect.left; | |
203 | y = rect.top; | |
204 | w = rect.right - rect.left; | |
205 | h = rect.bottom - rect.top; | |
206 | } else { | |
207 | x = y = w = h = 0; | |
208 | } | |
209 | } | |
210 | ||
211 | wxRect wxRegion::GetBox(void) const | |
212 | { | |
213 | long x, y, w, h; | |
214 | GetBox(x, y, w, h); | |
215 | return wxRect(x, y, w, h); | |
216 | } | |
217 | ||
218 | // Is region empty? | |
219 | bool wxRegion::Empty(void) const | |
220 | { | |
221 | if (M_REGION == 0) | |
222 | return TRUE; | |
223 | long x, y, w, h; | |
224 | GetBox(x, y, w, h); | |
225 | ||
226 | return ((w == 0) && (h == 0)); | |
227 | } | |
228 | ||
229 | //----------------------------------------------------------------------------- | |
230 | //# Tests | |
231 | //----------------------------------------------------------------------------- | |
232 | ||
233 | // Does the region contain the point (x,y)? | |
234 | wxRegionContain wxRegion::Contains(long x, long y) const | |
235 | { | |
236 | if (!m_refData) | |
237 | return wxOutRegion; | |
238 | ||
239 | if (::PtInRegion(M_REGION, (int) x, (int) y)) | |
240 | return wxInRegion; | |
241 | else | |
242 | return wxOutRegion; | |
243 | } | |
244 | ||
245 | // Does the region contain the point pt? | |
246 | wxRegionContain wxRegion::Contains(const wxPoint& pt) const | |
247 | { | |
248 | if (!m_refData) | |
249 | return wxOutRegion; | |
250 | ||
251 | if (::PtInRegion(M_REGION, (int) pt.x, (int) pt.y)) | |
252 | return wxInRegion; | |
253 | else | |
254 | return wxOutRegion; | |
255 | } | |
256 | ||
257 | // Does the region contain the rectangle (x, y, w, h)? | |
258 | wxRegionContain wxRegion::Contains(long x, long y, long w, long h) const | |
259 | { | |
260 | if (!m_refData) | |
261 | return wxOutRegion; | |
262 | ||
263 | RECT rect; | |
264 | rect.left = x; | |
265 | rect.top = y; | |
266 | rect.right = x + w; | |
267 | rect.bottom = y + h; | |
268 | ||
269 | if (::RectInRegion(M_REGION, & rect)) | |
270 | return wxInRegion; | |
271 | else | |
272 | return wxOutRegion; | |
273 | } | |
274 | ||
275 | // Does the region contain the rectangle rect | |
276 | wxRegionContain wxRegion::Contains(const wxRect& rect) const | |
277 | { | |
278 | if (!m_refData) | |
279 | return wxOutRegion; | |
280 | ||
281 | long x, y, w, h; | |
282 | x = rect.x; | |
283 | y = rect.y; | |
284 | w = rect.GetWidth(); | |
285 | h = rect.GetHeight(); | |
286 | return Contains(x, y, w, h); | |
287 | } | |
288 | ||
289 | /////////////////////////////////////////////////////////////////////////////// | |
290 | // // | |
291 | // wxRegionIterator // | |
292 | // // | |
293 | /////////////////////////////////////////////////////////////////////////////// | |
294 | ||
295 | /*! | |
296 | * Initialize empty iterator | |
297 | */ | |
298 | wxRegionIterator::wxRegionIterator(void) : m_current(0), m_numRects(0), m_rects(NULL) | |
299 | { | |
300 | } | |
301 | ||
302 | wxRegionIterator::~wxRegionIterator(void) | |
303 | { | |
304 | if (m_rects) | |
305 | delete[] m_rects; | |
306 | } | |
307 | ||
308 | /*! | |
309 | * Initialize iterator for region | |
310 | */ | |
311 | wxRegionIterator::wxRegionIterator(const wxRegion& region) | |
312 | { | |
313 | m_rects = NULL; | |
314 | ||
315 | Reset(region); | |
316 | } | |
317 | ||
318 | /*! | |
319 | * Reset iterator for a new /e region. | |
320 | */ | |
321 | void wxRegionIterator::Reset(const wxRegion& region) | |
322 | { | |
323 | m_current = 0; | |
324 | m_region = region; | |
325 | ||
326 | if (m_rects) | |
327 | delete[] m_rects; | |
328 | ||
329 | m_rects = NULL; | |
330 | ||
331 | if (m_region.Empty()) | |
332 | m_numRects = 0; | |
333 | else | |
334 | { | |
335 | #if defined(__WIN32__) | |
336 | DWORD noBytes = ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, 0, NULL); | |
337 | RGNDATA *rgnData = (RGNDATA*) new char[noBytes]; | |
338 | ::GetRegionData(((wxRegionRefData*)region.m_refData)->m_region, noBytes, rgnData); | |
339 | ||
340 | RGNDATAHEADER* header = (RGNDATAHEADER*) rgnData; | |
341 | ||
342 | m_rects = new wxRect[header->nCount]; | |
343 | ||
344 | RECT* rect = (RECT*) (rgnData + sizeof(RGNDATAHEADER)) ; | |
345 | uint i; | |
346 | for (i = 0; i < header->nCount; i++) | |
347 | { | |
348 | m_rects[i] = wxRect(rect->left, rect->top, | |
349 | rect->right - rect->left, rect->bottom - rect->top); | |
350 | rect += sizeof(RECT); | |
351 | } | |
352 | ||
353 | m_numRects = header->nCount; | |
354 | ||
355 | delete[] (char*) rgnData; | |
356 | #else | |
357 | RECT rect; | |
358 | ::GetRgnBox(((wxRegionRefData*)region.m_refData)->m_region, &rect); | |
359 | m_rects = new wxRect[1]; | |
360 | m_rects[0].x = rect.left; | |
361 | m_rects[0].y = rect.top; | |
362 | m_rects[0].width = rect.right - rect.left; | |
363 | m_rects[0].height = rect.bottom - rect.top; | |
364 | ||
365 | m_numRects = 1; | |
366 | #endif | |
367 | } | |
368 | } | |
369 | ||
370 | /*! | |
371 | * Increment iterator. The rectangle returned is the one after the | |
372 | * incrementation. | |
373 | */ | |
374 | void wxRegionIterator::operator ++ (void) | |
375 | { | |
376 | if (m_current < m_numRects) | |
377 | ++m_current; | |
378 | } | |
379 | ||
380 | /*! | |
381 | * Increment iterator. The rectangle returned is the one before the | |
382 | * incrementation. | |
383 | */ | |
384 | void wxRegionIterator::operator ++ (int) | |
385 | { | |
386 | if (m_current < m_numRects) | |
387 | ++m_current; | |
388 | } | |
389 | ||
390 | long wxRegionIterator::GetX(void) const | |
391 | { | |
392 | if (m_current < m_numRects) | |
393 | return m_rects[m_current].x; | |
394 | return 0; | |
395 | } | |
396 | ||
397 | long wxRegionIterator::GetY(void) const | |
398 | { | |
399 | if (m_current < m_numRects) | |
400 | return m_rects[m_current].y; | |
401 | return 0; | |
402 | } | |
403 | ||
404 | long wxRegionIterator::GetW(void) const | |
405 | { | |
406 | if (m_current < m_numRects) | |
407 | return m_rects[m_current].width ; | |
408 | return 0; | |
409 | } | |
410 | ||
411 | long wxRegionIterator::GetH(void) const | |
412 | { | |
413 | if (m_current < m_numRects) | |
414 | return m_rects[m_current].height; | |
415 | return 0; | |
416 | } | |
417 |