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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/gtk/region.cpp | |
3 | // Purpose: | |
4 | // Author: Robert Roebling | |
5 | // Modified: VZ at 05.10.00: use AllocExclusive(), comparison fixed | |
6 | // Id: $Id$ | |
7 | // Copyright: (c) 1998 Robert Roebling | |
8 | // Licence: wxWindows licence | |
9 | ///////////////////////////////////////////////////////////////////////////// | |
10 | ||
11 | // ============================================================================ | |
12 | // declarations | |
13 | // ============================================================================ | |
14 | ||
15 | // ---------------------------------------------------------------------------- | |
16 | // headers | |
17 | // ---------------------------------------------------------------------------- | |
18 | ||
19 | // For compilers that support precompilation, includes "wx.h". | |
20 | #include "wx/wxprec.h" | |
21 | ||
22 | #include "wx/region.h" | |
23 | ||
24 | #ifndef WX_PRECOMP | |
25 | #include "wx/log.h" | |
26 | #endif | |
27 | ||
28 | #include "wx/gtk/private.h" | |
29 | ||
30 | ||
31 | // ---------------------------------------------------------------------------- | |
32 | // wxRegionRefData: private class containing the information about the region | |
33 | // ---------------------------------------------------------------------------- | |
34 | ||
35 | class wxRegionRefData : public wxObjectRefData | |
36 | { | |
37 | public: | |
38 | wxRegionRefData() | |
39 | { | |
40 | m_region = NULL; | |
41 | } | |
42 | ||
43 | wxRegionRefData(const wxRegionRefData& refData) | |
44 | : wxObjectRefData() | |
45 | { | |
46 | m_region = gdk_region_copy(refData.m_region); | |
47 | } | |
48 | ||
49 | virtual ~wxRegionRefData() | |
50 | { | |
51 | if (m_region) | |
52 | gdk_region_destroy( m_region ); | |
53 | } | |
54 | ||
55 | GdkRegion *m_region; | |
56 | }; | |
57 | ||
58 | // ---------------------------------------------------------------------------- | |
59 | // macros | |
60 | // ---------------------------------------------------------------------------- | |
61 | ||
62 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) | |
63 | #define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData)) | |
64 | ||
65 | IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject) | |
66 | IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject) | |
67 | ||
68 | // ---------------------------------------------------------------------------- | |
69 | // wxRegion construction | |
70 | // ---------------------------------------------------------------------------- | |
71 | ||
72 | #define M_REGIONDATA ((wxRegionRefData *)m_refData) | |
73 | ||
74 | void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h) | |
75 | { | |
76 | GdkRectangle rect; | |
77 | rect.x = x; | |
78 | rect.y = y; | |
79 | rect.width = w; | |
80 | rect.height = h; | |
81 | ||
82 | m_refData = new wxRegionRefData(); | |
83 | ||
84 | M_REGIONDATA->m_region = gdk_region_rectangle( &rect ); | |
85 | } | |
86 | ||
87 | wxRegion::wxRegion( GdkRegion *region ) | |
88 | { | |
89 | m_refData = new wxRegionRefData(); | |
90 | M_REGIONDATA->m_region = gdk_region_copy( region ); | |
91 | } | |
92 | ||
93 | wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle ) | |
94 | { | |
95 | GdkPoint *gdkpoints = new GdkPoint[n]; | |
96 | for ( size_t i = 0 ; i < n ; i++ ) | |
97 | { | |
98 | gdkpoints[i].x = points[i].x; | |
99 | gdkpoints[i].y = points[i].y; | |
100 | } | |
101 | ||
102 | m_refData = new wxRegionRefData(); | |
103 | ||
104 | GdkRegion* reg = gdk_region_polygon | |
105 | ( | |
106 | gdkpoints, | |
107 | n, | |
108 | fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE | |
109 | : GDK_EVEN_ODD_RULE | |
110 | ); | |
111 | ||
112 | M_REGIONDATA->m_region = reg; | |
113 | ||
114 | delete [] gdkpoints; | |
115 | } | |
116 | ||
117 | wxRegion::~wxRegion() | |
118 | { | |
119 | // m_refData unrefed in ~wxObject | |
120 | } | |
121 | ||
122 | wxObjectRefData *wxRegion::CreateRefData() const | |
123 | { | |
124 | return new wxRegionRefData; | |
125 | } | |
126 | ||
127 | wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const | |
128 | { | |
129 | return new wxRegionRefData(*(wxRegionRefData *)data); | |
130 | } | |
131 | ||
132 | // ---------------------------------------------------------------------------- | |
133 | // wxRegion comparison | |
134 | // ---------------------------------------------------------------------------- | |
135 | ||
136 | bool wxRegion::DoIsEqual(const wxRegion& region) const | |
137 | { | |
138 | return gdk_region_equal(M_REGIONDATA->m_region, | |
139 | M_REGIONDATA_OF(region)->m_region); | |
140 | } | |
141 | ||
142 | // ---------------------------------------------------------------------------- | |
143 | // wxRegion operations | |
144 | // ---------------------------------------------------------------------------- | |
145 | ||
146 | void wxRegion::Clear() | |
147 | { | |
148 | UnRef(); | |
149 | } | |
150 | ||
151 | bool wxRegion::DoUnionWithRect(const wxRect& r) | |
152 | { | |
153 | // workaround for a strange GTK/X11 bug: taking union with an empty | |
154 | // rectangle results in an empty region which is definitely not what we | |
155 | // want | |
156 | if ( r.IsEmpty() ) | |
157 | return true; | |
158 | ||
159 | if ( !m_refData ) | |
160 | { | |
161 | InitRect(r.x, r.y, r.width, r.height); | |
162 | } | |
163 | else | |
164 | { | |
165 | AllocExclusive(); | |
166 | ||
167 | GdkRectangle rect; | |
168 | rect.x = r.x; | |
169 | rect.y = r.y; | |
170 | rect.width = r.width; | |
171 | rect.height = r.height; | |
172 | ||
173 | gdk_region_union_with_rect( M_REGIONDATA->m_region, &rect ); | |
174 | } | |
175 | ||
176 | return true; | |
177 | } | |
178 | ||
179 | bool wxRegion::DoUnionWithRegion( const wxRegion& region ) | |
180 | { | |
181 | wxCHECK_MSG( region.Ok(), false, _T("invalid region") ); | |
182 | ||
183 | if (!m_refData) | |
184 | { | |
185 | m_refData = new wxRegionRefData(); | |
186 | M_REGIONDATA->m_region = gdk_region_new(); | |
187 | } | |
188 | else | |
189 | { | |
190 | AllocExclusive(); | |
191 | } | |
192 | ||
193 | gdk_region_union( M_REGIONDATA->m_region, region.GetRegion() ); | |
194 | ||
195 | return true; | |
196 | } | |
197 | ||
198 | bool wxRegion::DoIntersect( const wxRegion& region ) | |
199 | { | |
200 | wxCHECK_MSG( region.Ok(), false, _T("invalid region") ); | |
201 | ||
202 | if (!m_refData) | |
203 | { | |
204 | // intersecting with invalid region doesn't make sense | |
205 | return false; | |
206 | } | |
207 | ||
208 | AllocExclusive(); | |
209 | ||
210 | gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() ); | |
211 | ||
212 | return true; | |
213 | } | |
214 | ||
215 | bool wxRegion::DoSubtract( const wxRegion& region ) | |
216 | { | |
217 | wxCHECK_MSG( region.Ok(), false, _T("invalid region") ); | |
218 | ||
219 | if (!m_refData) | |
220 | { | |
221 | // subtracting from an invalid region doesn't make sense | |
222 | return false; | |
223 | } | |
224 | ||
225 | AllocExclusive(); | |
226 | ||
227 | gdk_region_subtract( M_REGIONDATA->m_region, region.GetRegion() ); | |
228 | ||
229 | return true; | |
230 | } | |
231 | ||
232 | bool wxRegion::DoXor( const wxRegion& region ) | |
233 | { | |
234 | wxCHECK_MSG( region.Ok(), false, _T("invalid region") ); | |
235 | ||
236 | if (!m_refData) | |
237 | { | |
238 | return false; | |
239 | } | |
240 | ||
241 | AllocExclusive(); | |
242 | ||
243 | gdk_region_xor( M_REGIONDATA->m_region, region.GetRegion() ); | |
244 | ||
245 | return true; | |
246 | } | |
247 | ||
248 | bool wxRegion::DoOffset( wxCoord x, wxCoord y ) | |
249 | { | |
250 | if (!m_refData) | |
251 | return false; | |
252 | ||
253 | AllocExclusive(); | |
254 | ||
255 | gdk_region_offset( M_REGIONDATA->m_region, x, y ); | |
256 | ||
257 | return true; | |
258 | } | |
259 | ||
260 | // ---------------------------------------------------------------------------- | |
261 | // wxRegion tests | |
262 | // ---------------------------------------------------------------------------- | |
263 | ||
264 | bool wxRegion::DoGetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const | |
265 | { | |
266 | if ( m_refData ) | |
267 | { | |
268 | GdkRectangle rect; | |
269 | gdk_region_get_clipbox( M_REGIONDATA->m_region, &rect ); | |
270 | x = rect.x; | |
271 | y = rect.y; | |
272 | w = rect.width; | |
273 | h = rect.height; | |
274 | ||
275 | return true; | |
276 | } | |
277 | else | |
278 | { | |
279 | x = 0; | |
280 | y = 0; | |
281 | w = -1; | |
282 | h = -1; | |
283 | ||
284 | return false; | |
285 | } | |
286 | } | |
287 | ||
288 | bool wxRegion::IsEmpty() const | |
289 | { | |
290 | if (!m_refData) | |
291 | return true; | |
292 | ||
293 | return gdk_region_empty( M_REGIONDATA->m_region ); | |
294 | } | |
295 | ||
296 | wxRegionContain wxRegion::DoContainsPoint( wxCoord x, wxCoord y ) const | |
297 | { | |
298 | if (!m_refData) | |
299 | return wxOutRegion; | |
300 | ||
301 | if (gdk_region_point_in( M_REGIONDATA->m_region, x, y )) | |
302 | return wxInRegion; | |
303 | else | |
304 | return wxOutRegion; | |
305 | } | |
306 | ||
307 | wxRegionContain wxRegion::DoContainsRect(const wxRect& r) const | |
308 | { | |
309 | if (!m_refData) | |
310 | return wxOutRegion; | |
311 | ||
312 | GdkRectangle rect; | |
313 | rect.x = r.x; | |
314 | rect.y = r.y; | |
315 | rect.width = r.width; | |
316 | rect.height = r.height; | |
317 | GdkOverlapType res = gdk_region_rect_in( M_REGIONDATA->m_region, &rect ); | |
318 | switch (res) | |
319 | { | |
320 | case GDK_OVERLAP_RECTANGLE_IN: return wxInRegion; | |
321 | case GDK_OVERLAP_RECTANGLE_OUT: return wxOutRegion; | |
322 | case GDK_OVERLAP_RECTANGLE_PART: return wxPartRegion; | |
323 | } | |
324 | return wxOutRegion; | |
325 | } | |
326 | ||
327 | GdkRegion *wxRegion::GetRegion() const | |
328 | { | |
329 | if (!m_refData) | |
330 | return (GdkRegion*) NULL; | |
331 | ||
332 | return M_REGIONDATA->m_region; | |
333 | } | |
334 | ||
335 | // ---------------------------------------------------------------------------- | |
336 | // wxRegionIterator | |
337 | // ---------------------------------------------------------------------------- | |
338 | ||
339 | class wxRIRefData: public wxObjectRefData | |
340 | { | |
341 | public: | |
342 | wxRIRefData() { Init(); } | |
343 | virtual ~wxRIRefData(); | |
344 | ||
345 | void CreateRects( const wxRegion& r ); | |
346 | ||
347 | void Init() { m_rects = NULL; m_numRects = 0; } | |
348 | ||
349 | wxRect *m_rects; | |
350 | size_t m_numRects; | |
351 | }; | |
352 | ||
353 | wxRIRefData::~wxRIRefData() | |
354 | { | |
355 | delete [] m_rects; | |
356 | } | |
357 | ||
358 | void wxRIRefData::CreateRects( const wxRegion& region ) | |
359 | { | |
360 | delete [] m_rects; | |
361 | ||
362 | Init(); | |
363 | ||
364 | GdkRegion *gdkregion = region.GetRegion(); | |
365 | if (!gdkregion) | |
366 | return; | |
367 | ||
368 | GdkRectangle *gdkrects = NULL; | |
369 | gint numRects = 0; | |
370 | gdk_region_get_rectangles( gdkregion, &gdkrects, &numRects ); | |
371 | ||
372 | m_numRects = numRects; | |
373 | if (numRects) | |
374 | { | |
375 | m_rects = new wxRect[m_numRects]; | |
376 | for (size_t i=0; i < m_numRects; ++i) | |
377 | { | |
378 | GdkRectangle &gr = gdkrects[i]; | |
379 | wxRect &wr = m_rects[i]; | |
380 | wr.x = gr.x; | |
381 | wr.y = gr.y; | |
382 | wr.width = gr.width; | |
383 | wr.height = gr.height; | |
384 | } | |
385 | } | |
386 | g_free( gdkrects ); | |
387 | } | |
388 | ||
389 | wxRegionIterator::wxRegionIterator() | |
390 | { | |
391 | m_refData = new wxRIRefData(); | |
392 | Reset(); | |
393 | } | |
394 | ||
395 | wxRegionIterator::wxRegionIterator( const wxRegion& region ) | |
396 | { | |
397 | m_refData = new wxRIRefData(); | |
398 | Reset(region); | |
399 | } | |
400 | ||
401 | void wxRegionIterator::Reset( const wxRegion& region ) | |
402 | { | |
403 | m_region = region; | |
404 | ((wxRIRefData*)m_refData)->CreateRects(region); | |
405 | Reset(); | |
406 | } | |
407 | ||
408 | bool wxRegionIterator::HaveRects() const | |
409 | { | |
410 | return m_current < ((wxRIRefData*)m_refData)->m_numRects; | |
411 | } | |
412 | ||
413 | wxRegionIterator& wxRegionIterator::operator ++ () | |
414 | { | |
415 | if (HaveRects()) | |
416 | ++m_current; | |
417 | ||
418 | return *this; | |
419 | } | |
420 | ||
421 | wxRegionIterator wxRegionIterator::operator ++ (int) | |
422 | { | |
423 | wxRegionIterator tmp = *this; | |
424 | if (HaveRects()) | |
425 | ++m_current; | |
426 | ||
427 | return tmp; | |
428 | } | |
429 | ||
430 | wxCoord wxRegionIterator::GetX() const | |
431 | { | |
432 | wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") ); | |
433 | ||
434 | return ((wxRIRefData*)m_refData)->m_rects[m_current].x; | |
435 | } | |
436 | ||
437 | wxCoord wxRegionIterator::GetY() const | |
438 | { | |
439 | wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") ); | |
440 | ||
441 | return ((wxRIRefData*)m_refData)->m_rects[m_current].y; | |
442 | } | |
443 | ||
444 | wxCoord wxRegionIterator::GetW() const | |
445 | { | |
446 | wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") ); | |
447 | ||
448 | return ((wxRIRefData*)m_refData)->m_rects[m_current].width; | |
449 | } | |
450 | ||
451 | wxCoord wxRegionIterator::GetH() const | |
452 | { | |
453 | wxCHECK_MSG( HaveRects(), 0, _T("invalid wxRegionIterator") ); | |
454 | ||
455 | return ((wxRIRefData*)m_refData)->m_rects[m_current].height; | |
456 | } | |
457 | ||
458 | wxRect wxRegionIterator::GetRect() const | |
459 | { | |
460 | wxRect r; | |
461 | if( HaveRects() ) | |
462 | r = ((wxRIRefData*)m_refData)->m_rects[m_current]; | |
463 | ||
464 | return r; | |
465 | } |