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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: wx/object.h | |
3 | // Purpose: wxObject class, plus run-time type information macros | |
4 | // Author: Julian Smart | |
5 | // Modified by: Ron Lee | |
6 | // Created: 01/02/97 | |
7 | // RCS-ID: $Id$ | |
8 | // Copyright: (c) 1997 Julian Smart | |
9 | // (c) 2001 Ron Lee <ron@debian.org> | |
10 | // Licence: wxWindows licence | |
11 | ///////////////////////////////////////////////////////////////////////////// | |
12 | ||
13 | #ifndef _WX_OBJECTH__ | |
14 | #define _WX_OBJECTH__ | |
15 | ||
16 | // ---------------------------------------------------------------------------- | |
17 | // headers | |
18 | // ---------------------------------------------------------------------------- | |
19 | ||
20 | #include "wx/memory.h" | |
21 | ||
22 | class WXDLLIMPEXP_FWD_BASE wxObject; | |
23 | class WXDLLIMPEXP_FWD_BASE wxString; | |
24 | ||
25 | #ifndef wxUSE_EXTENDED_RTTI | |
26 | #define wxUSE_EXTENDED_RTTI 0 | |
27 | #endif | |
28 | ||
29 | #define DECLARE_CLASS_INFO_ITERATORS() \ | |
30 | class WXDLLIMPEXP_BASE const_iterator \ | |
31 | { \ | |
32 | typedef wxHashTable_Node Node; \ | |
33 | public: \ | |
34 | typedef const wxClassInfo* value_type; \ | |
35 | typedef const value_type& const_reference; \ | |
36 | typedef const_iterator itor; \ | |
37 | typedef value_type* ptr_type; \ | |
38 | \ | |
39 | Node* m_node; \ | |
40 | wxHashTable* m_table; \ | |
41 | public: \ | |
42 | typedef const_reference reference_type; \ | |
43 | typedef ptr_type pointer_type; \ | |
44 | \ | |
45 | const_iterator(Node* node, wxHashTable* table) \ | |
46 | : m_node(node), m_table(table) { } \ | |
47 | const_iterator() : m_node(NULL), m_table(NULL) { } \ | |
48 | value_type operator*() const; \ | |
49 | itor& operator++(); \ | |
50 | const itor operator++(int); \ | |
51 | bool operator!=(const itor& it) const \ | |
52 | { return it.m_node != m_node; } \ | |
53 | bool operator==(const itor& it) const \ | |
54 | { return it.m_node == m_node; } \ | |
55 | }; \ | |
56 | \ | |
57 | static const_iterator begin_classinfo(); \ | |
58 | static const_iterator end_classinfo(); | |
59 | ||
60 | #if wxUSE_EXTENDED_RTTI | |
61 | #include "wx/xti.h" | |
62 | #else | |
63 | ||
64 | // ---------------------------------------------------------------------------- | |
65 | // conditional compilation | |
66 | // ---------------------------------------------------------------------------- | |
67 | ||
68 | class WXDLLIMPEXP_FWD_BASE wxClassInfo; | |
69 | class WXDLLIMPEXP_FWD_BASE wxHashTable; | |
70 | class WXDLLIMPEXP_FWD_BASE wxObject; | |
71 | class WXDLLIMPEXP_FWD_BASE wxPluginLibrary; | |
72 | class WXDLLIMPEXP_FWD_BASE wxObjectRefData; | |
73 | class WXDLLIMPEXP_FWD_BASE wxHashTable_Node; | |
74 | ||
75 | // ---------------------------------------------------------------------------- | |
76 | // wxClassInfo | |
77 | // ---------------------------------------------------------------------------- | |
78 | ||
79 | typedef wxObject *(*wxObjectConstructorFn)(void); | |
80 | ||
81 | class WXDLLIMPEXP_BASE wxClassInfo | |
82 | { | |
83 | friend class WXDLLIMPEXP_FWD_BASE wxObject; | |
84 | friend WXDLLIMPEXP_BASE wxObject *wxCreateDynamicObject(const wxString& name); | |
85 | public: | |
86 | wxClassInfo( const wxChar *className, | |
87 | const wxClassInfo *baseInfo1, | |
88 | const wxClassInfo *baseInfo2, | |
89 | int size, | |
90 | wxObjectConstructorFn ctor ) | |
91 | : m_className(className) | |
92 | , m_objectSize(size) | |
93 | , m_objectConstructor(ctor) | |
94 | , m_baseInfo1(baseInfo1) | |
95 | , m_baseInfo2(baseInfo2) | |
96 | , m_next(sm_first) | |
97 | { | |
98 | sm_first = this; | |
99 | Register(); | |
100 | } | |
101 | ||
102 | ~wxClassInfo(); | |
103 | ||
104 | wxObject *CreateObject() const | |
105 | { return m_objectConstructor ? (*m_objectConstructor)() : 0; } | |
106 | bool IsDynamic() const { return (NULL != m_objectConstructor); } | |
107 | ||
108 | const wxChar *GetClassName() const { return m_className; } | |
109 | const wxChar *GetBaseClassName1() const | |
110 | { return m_baseInfo1 ? m_baseInfo1->GetClassName() : NULL; } | |
111 | const wxChar *GetBaseClassName2() const | |
112 | { return m_baseInfo2 ? m_baseInfo2->GetClassName() : NULL; } | |
113 | const wxClassInfo *GetBaseClass1() const { return m_baseInfo1; } | |
114 | const wxClassInfo *GetBaseClass2() const { return m_baseInfo2; } | |
115 | int GetSize() const { return m_objectSize; } | |
116 | ||
117 | wxObjectConstructorFn GetConstructor() const | |
118 | { return m_objectConstructor; } | |
119 | static const wxClassInfo *GetFirst() { return sm_first; } | |
120 | const wxClassInfo *GetNext() const { return m_next; } | |
121 | static wxClassInfo *FindClass(const wxString& className); | |
122 | ||
123 | // Climb upwards through inheritance hierarchy. | |
124 | // Dual inheritance is catered for. | |
125 | ||
126 | bool IsKindOf(const wxClassInfo *info) const | |
127 | { | |
128 | return info != 0 && | |
129 | ( info == this || | |
130 | ( m_baseInfo1 && m_baseInfo1->IsKindOf(info) ) || | |
131 | ( m_baseInfo2 && m_baseInfo2->IsKindOf(info) ) ); | |
132 | } | |
133 | ||
134 | DECLARE_CLASS_INFO_ITERATORS() | |
135 | private: | |
136 | const wxChar *m_className; | |
137 | int m_objectSize; | |
138 | wxObjectConstructorFn m_objectConstructor; | |
139 | ||
140 | // Pointers to base wxClassInfos | |
141 | ||
142 | const wxClassInfo *m_baseInfo1; | |
143 | const wxClassInfo *m_baseInfo2; | |
144 | ||
145 | // class info object live in a linked list: | |
146 | // pointers to its head and the next element in it | |
147 | ||
148 | static wxClassInfo *sm_first; | |
149 | wxClassInfo *m_next; | |
150 | ||
151 | static wxHashTable *sm_classTable; | |
152 | ||
153 | protected: | |
154 | // registers the class | |
155 | void Register(); | |
156 | void Unregister(); | |
157 | ||
158 | wxDECLARE_NO_COPY_CLASS(wxClassInfo); | |
159 | }; | |
160 | ||
161 | WXDLLIMPEXP_BASE wxObject *wxCreateDynamicObject(const wxString& name); | |
162 | ||
163 | // ---------------------------------------------------------------------------- | |
164 | // Dynamic class macros | |
165 | // ---------------------------------------------------------------------------- | |
166 | ||
167 | #define DECLARE_ABSTRACT_CLASS(name) \ | |
168 | public: \ | |
169 | static wxClassInfo ms_classInfo; \ | |
170 | virtual wxClassInfo *GetClassInfo() const; | |
171 | ||
172 | #define DECLARE_DYNAMIC_CLASS_NO_ASSIGN(name) \ | |
173 | DECLARE_NO_ASSIGN_CLASS(name) \ | |
174 | DECLARE_DYNAMIC_CLASS(name) | |
175 | ||
176 | #define DECLARE_DYNAMIC_CLASS_NO_COPY(name) \ | |
177 | DECLARE_NO_COPY_CLASS(name) \ | |
178 | DECLARE_DYNAMIC_CLASS(name) | |
179 | ||
180 | #define DECLARE_DYNAMIC_CLASS(name) \ | |
181 | DECLARE_ABSTRACT_CLASS(name) \ | |
182 | static wxObject* wxCreateObject(); | |
183 | ||
184 | #define DECLARE_CLASS(name) DECLARE_DYNAMIC_CLASS(name) | |
185 | ||
186 | ||
187 | // common part of the macros below | |
188 | #define wxIMPLEMENT_CLASS_COMMON(name, basename, baseclsinfo2, func) \ | |
189 | wxClassInfo name::ms_classInfo(wxT(#name), \ | |
190 | &basename::ms_classInfo, \ | |
191 | baseclsinfo2, \ | |
192 | (int) sizeof(name), \ | |
193 | func); \ | |
194 | \ | |
195 | wxClassInfo *name::GetClassInfo() const \ | |
196 | { return &name::ms_classInfo; } | |
197 | ||
198 | #define wxIMPLEMENT_CLASS_COMMON1(name, basename, func) \ | |
199 | wxIMPLEMENT_CLASS_COMMON(name, basename, NULL, func) | |
200 | ||
201 | #define wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, func) \ | |
202 | wxIMPLEMENT_CLASS_COMMON(name, basename1, &basename2::ms_classInfo, func) | |
203 | ||
204 | // ----------------------------------- | |
205 | // for concrete classes | |
206 | // ----------------------------------- | |
207 | ||
208 | // Single inheritance with one base class | |
209 | #define IMPLEMENT_DYNAMIC_CLASS(name, basename) \ | |
210 | wxIMPLEMENT_CLASS_COMMON1(name, basename, name::wxCreateObject) \ | |
211 | wxObject* name::wxCreateObject() \ | |
212 | { return new name; } | |
213 | ||
214 | // Multiple inheritance with two base classes | |
215 | #define IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) \ | |
216 | wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, \ | |
217 | name::wxCreateObject) \ | |
218 | wxObject* name::wxCreateObject() \ | |
219 | { return new name; } | |
220 | ||
221 | // ----------------------------------- | |
222 | // for abstract classes | |
223 | // ----------------------------------- | |
224 | ||
225 | // Single inheritance with one base class | |
226 | ||
227 | #define IMPLEMENT_ABSTRACT_CLASS(name, basename) \ | |
228 | wxIMPLEMENT_CLASS_COMMON1(name, basename, NULL) | |
229 | ||
230 | // Multiple inheritance with two base classes | |
231 | ||
232 | #define IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) \ | |
233 | wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, NULL) | |
234 | ||
235 | #define IMPLEMENT_CLASS IMPLEMENT_ABSTRACT_CLASS | |
236 | #define IMPLEMENT_CLASS2 IMPLEMENT_ABSTRACT_CLASS2 | |
237 | ||
238 | #endif // !wxUSE_EXTENDED_RTTI | |
239 | ||
240 | ||
241 | // ----------------------------------- | |
242 | // for pluggable classes | |
243 | // ----------------------------------- | |
244 | ||
245 | // NOTE: this should probably be the very first statement | |
246 | // in the class declaration so wxPluginSentinel is | |
247 | // the first member initialised and the last destroyed. | |
248 | ||
249 | // _DECLARE_DL_SENTINEL(name) wxPluginSentinel m_pluginsentinel; | |
250 | ||
251 | #if wxUSE_NESTED_CLASSES | |
252 | ||
253 | #define _DECLARE_DL_SENTINEL(name, exportdecl) \ | |
254 | class exportdecl name##PluginSentinel { \ | |
255 | private: \ | |
256 | static const wxString sm_className; \ | |
257 | public: \ | |
258 | name##PluginSentinel(); \ | |
259 | ~name##PluginSentinel(); \ | |
260 | }; \ | |
261 | name##PluginSentinel m_pluginsentinel; | |
262 | ||
263 | #define _IMPLEMENT_DL_SENTINEL(name) \ | |
264 | const wxString name::name##PluginSentinel::sm_className(#name); \ | |
265 | name::name##PluginSentinel::name##PluginSentinel() { \ | |
266 | wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \ | |
267 | if( e != 0 ) { e->RefObj(); } \ | |
268 | } \ | |
269 | name::name##PluginSentinel::~name##PluginSentinel() { \ | |
270 | wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \ | |
271 | if( e != 0 ) { e->UnrefObj(); } \ | |
272 | } | |
273 | #else | |
274 | ||
275 | #define _DECLARE_DL_SENTINEL(name) | |
276 | #define _IMPLEMENT_DL_SENTINEL(name) | |
277 | ||
278 | #endif // wxUSE_NESTED_CLASSES | |
279 | ||
280 | #define DECLARE_PLUGGABLE_CLASS(name) \ | |
281 | DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLIMPEXP_CORE) | |
282 | #define DECLARE_ABSTRACT_PLUGGABLE_CLASS(name) \ | |
283 | DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLIMPEXP_CORE) | |
284 | ||
285 | #define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) \ | |
286 | DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo) | |
287 | #define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo) \ | |
288 | DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo) | |
289 | ||
290 | #define IMPLEMENT_PLUGGABLE_CLASS(name, basename) \ | |
291 | IMPLEMENT_DYNAMIC_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name) | |
292 | #define IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) \ | |
293 | IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name) | |
294 | #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) \ | |
295 | IMPLEMENT_ABSTRACT_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name) | |
296 | #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \ | |
297 | IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name) | |
298 | ||
299 | #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) \ | |
300 | IMPLEMENT_PLUGGABLE_CLASS(name, basename) | |
301 | #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2) \ | |
302 | IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) | |
303 | #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) \ | |
304 | IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) | |
305 | #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \ | |
306 | IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) | |
307 | ||
308 | #define CLASSINFO(name) (&name::ms_classInfo) | |
309 | ||
310 | #define wxIS_KIND_OF(obj, className) obj->IsKindOf(&className::ms_classInfo) | |
311 | ||
312 | // Just seems a bit nicer-looking (pretend it's not a macro) | |
313 | #define wxIsKindOf(obj, className) obj->IsKindOf(&className::ms_classInfo) | |
314 | ||
315 | // this cast does some more checks at compile time as it uses static_cast | |
316 | // internally | |
317 | // | |
318 | // note that it still has different semantics from dynamic_cast<> and so can't | |
319 | // be replaced by it as long as there are any compilers not supporting it | |
320 | #define wxDynamicCast(obj, className) \ | |
321 | ((className *) wxCheckDynamicCast( \ | |
322 | const_cast<wxObject *>(static_cast<const wxObject *>(\ | |
323 | const_cast<className *>(static_cast<const className *>(obj)))), \ | |
324 | &className::ms_classInfo)) | |
325 | ||
326 | // The 'this' pointer is always true, so use this version | |
327 | // to cast the this pointer and avoid compiler warnings. | |
328 | #define wxDynamicCastThis(className) \ | |
329 | (IsKindOf(&className::ms_classInfo) ? (className *)(this) : (className *)0) | |
330 | ||
331 | // FIXME-VC6: dummy argument needed because VC6 doesn't support explicitly | |
332 | // choosing the template function to call | |
333 | template <class T> | |
334 | inline T *wxCheckCast(const void *ptr, T * = NULL) | |
335 | { | |
336 | wxASSERT_MSG( wxDynamicCast(ptr, T), "wxStaticCast() used incorrectly" ); | |
337 | return const_cast<T *>(static_cast<const T *>(ptr)); | |
338 | } | |
339 | ||
340 | #define wxStaticCast(obj, className) wxCheckCast((obj), (className *)NULL) | |
341 | ||
342 | // ---------------------------------------------------------------------------- | |
343 | // set up memory debugging macros | |
344 | // ---------------------------------------------------------------------------- | |
345 | ||
346 | /* | |
347 | Which new/delete operator variants do we want? | |
348 | ||
349 | _WX_WANT_NEW_SIZET_WXCHAR_INT = void *operator new (size_t size, wxChar *fileName = 0, int lineNum = 0) | |
350 | _WX_WANT_DELETE_VOID = void operator delete (void * buf) | |
351 | _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET = void operator delete (void *buf, const char *_fname, size_t _line) | |
352 | _WX_WANT_DELETE_VOID_WXCHAR_INT = void operator delete(void *buf, wxChar*, int) | |
353 | _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT = void *operator new[] (size_t size, wxChar *fileName , int lineNum = 0) | |
354 | _WX_WANT_ARRAY_DELETE_VOID = void operator delete[] (void *buf) | |
355 | _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT = void operator delete[] (void* buf, wxChar*, int ) | |
356 | */ | |
357 | ||
358 | #if wxUSE_MEMORY_TRACING | |
359 | ||
360 | // All compilers get this one | |
361 | #define _WX_WANT_NEW_SIZET_WXCHAR_INT | |
362 | ||
363 | // Everyone except Visage gets the next one | |
364 | #ifndef __VISAGECPP__ | |
365 | #define _WX_WANT_DELETE_VOID | |
366 | #endif | |
367 | ||
368 | // Only visage gets this one under the correct circumstances | |
369 | #if defined(__VISAGECPP__) && __DEBUG_ALLOC__ | |
370 | #define _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET | |
371 | #endif | |
372 | ||
373 | // Only VC++ 6 and CodeWarrior get overloaded delete that matches new | |
374 | #if (defined(__VISUALC__) && (__VISUALC__ >= 1200)) || \ | |
375 | (defined(__MWERKS__) && (__MWERKS__ >= 0x2400)) | |
376 | #define _WX_WANT_DELETE_VOID_WXCHAR_INT | |
377 | #endif | |
378 | ||
379 | // Now see who (if anyone) gets the array memory operators | |
380 | #if wxUSE_ARRAY_MEMORY_OPERATORS | |
381 | ||
382 | // Everyone except Visual C++ (cause problems for VC++ - crashes) | |
383 | #if !defined(__VISUALC__) | |
384 | #define _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT | |
385 | #endif | |
386 | ||
387 | // Everyone except Visual C++ (cause problems for VC++ - crashes) | |
388 | #if !defined(__VISUALC__) | |
389 | #define _WX_WANT_ARRAY_DELETE_VOID | |
390 | #endif | |
391 | ||
392 | // Only CodeWarrior 6 or higher | |
393 | #if defined(__MWERKS__) && (__MWERKS__ >= 0x2400) | |
394 | #define _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT | |
395 | #endif | |
396 | ||
397 | #endif // wxUSE_ARRAY_MEMORY_OPERATORS | |
398 | ||
399 | #endif // wxUSE_MEMORY_TRACING | |
400 | ||
401 | // ---------------------------------------------------------------------------- | |
402 | // wxObjectRefData: ref counted data meant to be stored in wxObject | |
403 | // ---------------------------------------------------------------------------- | |
404 | ||
405 | class WXDLLIMPEXP_BASE wxObjectRefData | |
406 | { | |
407 | friend class WXDLLIMPEXP_FWD_BASE wxObject; | |
408 | ||
409 | public: | |
410 | wxObjectRefData() : m_count(1) { } | |
411 | ||
412 | int GetRefCount() const { return m_count; } | |
413 | ||
414 | void IncRef() { m_count++; } | |
415 | void DecRef(); | |
416 | ||
417 | protected: | |
418 | // this object should never be destroyed directly but only as a | |
419 | // result of a DecRef() call: | |
420 | virtual ~wxObjectRefData() { } | |
421 | ||
422 | private: | |
423 | // our refcount: | |
424 | int m_count; | |
425 | }; | |
426 | ||
427 | // ---------------------------------------------------------------------------- | |
428 | // wxObjectDataPtr: helper class to avoid memleaks because of missing calls | |
429 | // to wxObjectRefData::DecRef | |
430 | // ---------------------------------------------------------------------------- | |
431 | ||
432 | template <class T> | |
433 | class wxObjectDataPtr | |
434 | { | |
435 | public: | |
436 | typedef T element_type; | |
437 | ||
438 | wxEXPLICIT wxObjectDataPtr(T *ptr = NULL) : m_ptr(ptr) {} | |
439 | ||
440 | // copy ctor | |
441 | wxObjectDataPtr(const wxObjectDataPtr<T> &tocopy) | |
442 | : m_ptr(tocopy.m_ptr) | |
443 | { | |
444 | if (m_ptr) | |
445 | m_ptr->IncRef(); | |
446 | } | |
447 | ||
448 | ~wxObjectDataPtr() | |
449 | { | |
450 | if (m_ptr) | |
451 | m_ptr->DecRef(); | |
452 | } | |
453 | ||
454 | T *get() const { return m_ptr; } | |
455 | ||
456 | // test for pointer validity: defining conversion to unspecified_bool_type | |
457 | // and not more obvious bool to avoid implicit conversions to integer types | |
458 | typedef T *(wxObjectDataPtr<T>::*unspecified_bool_type)() const; | |
459 | operator unspecified_bool_type() const | |
460 | { | |
461 | return m_ptr ? &wxObjectDataPtr<T>::get : NULL; | |
462 | } | |
463 | ||
464 | T& operator*() const | |
465 | { | |
466 | wxASSERT(m_ptr != NULL); | |
467 | return *(m_ptr); | |
468 | } | |
469 | ||
470 | T *operator->() const | |
471 | { | |
472 | wxASSERT(m_ptr != NULL); | |
473 | return get(); | |
474 | } | |
475 | ||
476 | void reset(T *ptr) | |
477 | { | |
478 | if (m_ptr) | |
479 | m_ptr->DecRef(); | |
480 | m_ptr = ptr; | |
481 | } | |
482 | ||
483 | wxObjectDataPtr& operator=(const wxObjectDataPtr &tocopy) | |
484 | { | |
485 | if (m_ptr) | |
486 | m_ptr->DecRef(); | |
487 | m_ptr = tocopy.m_ptr; | |
488 | if (m_ptr) | |
489 | m_ptr->IncRef(); | |
490 | return *this; | |
491 | } | |
492 | ||
493 | wxObjectDataPtr& operator=(T *ptr) | |
494 | { | |
495 | if (m_ptr) | |
496 | m_ptr->DecRef(); | |
497 | m_ptr = ptr; | |
498 | return *this; | |
499 | } | |
500 | ||
501 | private: | |
502 | T *m_ptr; | |
503 | }; | |
504 | ||
505 | // ---------------------------------------------------------------------------- | |
506 | // wxObject: the root class of wxWidgets object hierarchy | |
507 | // ---------------------------------------------------------------------------- | |
508 | ||
509 | class WXDLLIMPEXP_BASE wxObject | |
510 | { | |
511 | DECLARE_ABSTRACT_CLASS(wxObject) | |
512 | ||
513 | public: | |
514 | wxObject() { m_refData = NULL; } | |
515 | virtual ~wxObject() { UnRef(); } | |
516 | ||
517 | wxObject(const wxObject& other) | |
518 | { | |
519 | m_refData = other.m_refData; | |
520 | if (m_refData) | |
521 | m_refData->m_count++; | |
522 | } | |
523 | ||
524 | wxObject& operator=(const wxObject& other) | |
525 | { | |
526 | if ( this != &other ) | |
527 | { | |
528 | Ref(other); | |
529 | } | |
530 | return *this; | |
531 | } | |
532 | ||
533 | bool IsKindOf(const wxClassInfo *info) const; | |
534 | ||
535 | ||
536 | // Turn on the correct set of new and delete operators | |
537 | ||
538 | #ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT | |
539 | void *operator new ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 ); | |
540 | #endif | |
541 | ||
542 | #ifdef _WX_WANT_DELETE_VOID | |
543 | void operator delete ( void * buf ); | |
544 | #endif | |
545 | ||
546 | #ifdef _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET | |
547 | void operator delete ( void *buf, const char *_fname, size_t _line ); | |
548 | #endif | |
549 | ||
550 | #ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT | |
551 | void operator delete ( void *buf, const wxChar*, int ); | |
552 | #endif | |
553 | ||
554 | #ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT | |
555 | void *operator new[] ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 ); | |
556 | #endif | |
557 | ||
558 | #ifdef _WX_WANT_ARRAY_DELETE_VOID | |
559 | void operator delete[] ( void *buf ); | |
560 | #endif | |
561 | ||
562 | #ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT | |
563 | void operator delete[] (void* buf, const wxChar*, int ); | |
564 | #endif | |
565 | ||
566 | // ref counted data handling methods | |
567 | ||
568 | // get/set | |
569 | wxObjectRefData *GetRefData() const { return m_refData; } | |
570 | void SetRefData(wxObjectRefData *data) { m_refData = data; } | |
571 | ||
572 | // make a 'clone' of the object | |
573 | void Ref(const wxObject& clone); | |
574 | ||
575 | // destroy a reference | |
576 | void UnRef(); | |
577 | ||
578 | // Make sure this object has only one reference | |
579 | void UnShare() { AllocExclusive(); } | |
580 | ||
581 | // check if this object references the same data as the other one | |
582 | bool IsSameAs(const wxObject& o) const { return m_refData == o.m_refData; } | |
583 | ||
584 | protected: | |
585 | // ensure that our data is not shared with anybody else: if we have no | |
586 | // data, it is created using CreateRefData() below, if we have shared data | |
587 | // it is copied using CloneRefData(), otherwise nothing is done | |
588 | void AllocExclusive(); | |
589 | ||
590 | // both methods must be implemented if AllocExclusive() is used, not pure | |
591 | // virtual only because of the backwards compatibility reasons | |
592 | ||
593 | // create a new m_refData | |
594 | virtual wxObjectRefData *CreateRefData() const; | |
595 | ||
596 | // create a new m_refData initialized with the given one | |
597 | virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const; | |
598 | ||
599 | wxObjectRefData *m_refData; | |
600 | }; | |
601 | ||
602 | inline wxObject *wxCheckDynamicCast(wxObject *obj, wxClassInfo *classInfo) | |
603 | { | |
604 | return obj && obj->GetClassInfo()->IsKindOf(classInfo) ? obj : NULL; | |
605 | } | |
606 | ||
607 | #if wxUSE_EXTENDED_RTTI | |
608 | class WXDLLIMPEXP_BASE wxDynamicObject : public wxObject | |
609 | { | |
610 | friend class WXDLLIMPEXP_FWD_BASE wxDynamicClassInfo ; | |
611 | public: | |
612 | // instantiates this object with an instance of its superclass | |
613 | wxDynamicObject(wxObject* superClassInstance, const wxDynamicClassInfo *info) ; | |
614 | virtual ~wxDynamicObject(); | |
615 | ||
616 | void SetProperty (const wxChar *propertyName, const wxxVariant &value); | |
617 | wxxVariant GetProperty (const wxChar *propertyName) const ; | |
618 | ||
619 | // get the runtime identity of this object | |
620 | wxClassInfo *GetClassInfo() const | |
621 | { | |
622 | #ifdef _MSC_VER | |
623 | return (wxClassInfo*) m_classInfo; | |
624 | #else | |
625 | wxDynamicClassInfo *nonconst = const_cast<wxDynamicClassInfo *>(m_classInfo); | |
626 | return static_cast<wxClassInfo *>(nonconst); | |
627 | #endif | |
628 | } | |
629 | ||
630 | wxObject* GetSuperClassInstance() const | |
631 | { | |
632 | return m_superClassInstance ; | |
633 | } | |
634 | private : | |
635 | // removes an existing runtime-property | |
636 | void RemoveProperty( const wxChar *propertyName ) ; | |
637 | ||
638 | // renames an existing runtime-property | |
639 | void RenameProperty( const wxChar *oldPropertyName , const wxChar *newPropertyName ) ; | |
640 | ||
641 | wxObject *m_superClassInstance ; | |
642 | const wxDynamicClassInfo *m_classInfo; | |
643 | struct wxDynamicObjectInternal; | |
644 | wxDynamicObjectInternal *m_data; | |
645 | }; | |
646 | #endif | |
647 | ||
648 | // ---------------------------------------------------------------------------- | |
649 | // more debugging macros | |
650 | // ---------------------------------------------------------------------------- | |
651 | ||
652 | #if wxUSE_DEBUG_NEW_ALWAYS | |
653 | #define WXDEBUG_NEW new(__TFILE__,__LINE__) | |
654 | ||
655 | #if wxUSE_GLOBAL_MEMORY_OPERATORS | |
656 | #define new WXDEBUG_NEW | |
657 | #elif defined(__VISUALC__) | |
658 | // Including this file redefines new and allows leak reports to | |
659 | // contain line numbers | |
660 | #include "wx/msw/msvcrt.h" | |
661 | #endif | |
662 | #endif // wxUSE_DEBUG_NEW_ALWAYS | |
663 | ||
664 | #endif // _WX_OBJECTH__ |