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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_BASE wxObject;
23
24 #ifndef wxUSE_EXTENDED_RTTI
25 #define wxUSE_EXTENDED_RTTI 0
26 #endif
27
28 #if wxUSE_EXTENDED_RTTI
29 #include "wx/xti.h"
30 #else
31
32 // ----------------------------------------------------------------------------
33 // conditional compilation
34 // ----------------------------------------------------------------------------
35
36 class WXDLLIMPEXP_BASE wxClassInfo;
37 class WXDLLIMPEXP_BASE wxHashTable;
38 class WXDLLIMPEXP_BASE wxObjectRefData;
39
40 // ----------------------------------------------------------------------------
41 // wxClassInfo
42 // ----------------------------------------------------------------------------
43
44 typedef wxObject *(*wxObjectConstructorFn)(void);
45
46 class WXDLLIMPEXP_BASE wxClassInfo
47 {
48 public:
49 wxClassInfo( const wxChar *className,
50 const wxClassInfo *baseInfo1,
51 const wxClassInfo *baseInfo2,
52 int size,
53 wxObjectConstructorFn ctor )
54 : m_className(className)
55 , m_objectSize(size)
56 , m_objectConstructor(ctor)
57 , m_baseInfo1(baseInfo1)
58 , m_baseInfo2(baseInfo2)
59 , m_next(sm_first)
60 {
61 sm_first = this;
62 Register();
63 }
64
65 ~wxClassInfo();
66
67 wxObject *CreateObject() const { return m_objectConstructor ? (*m_objectConstructor)() : 0; }
68 bool IsDynamic() const { return (NULL != m_objectConstructor); }
69
70 const wxChar *GetClassName() const { return m_className; }
71 const wxChar *GetBaseClassName1() const
72 { return m_baseInfo1 ? m_baseInfo1->GetClassName() : NULL; }
73 const wxChar *GetBaseClassName2() const
74 { return m_baseInfo2 ? m_baseInfo2->GetClassName() : NULL; }
75 const wxClassInfo *GetBaseClass1() const { return m_baseInfo1; }
76 const wxClassInfo *GetBaseClass2() const { return m_baseInfo2; }
77 int GetSize() const { return m_objectSize; }
78
79 wxObjectConstructorFn GetConstructor() const { return m_objectConstructor; }
80 static const wxClassInfo *GetFirst() { return sm_first; }
81 const wxClassInfo *GetNext() const { return m_next; }
82 static wxClassInfo *FindClass(const wxChar *className);
83
84 // Climb upwards through inheritance hierarchy.
85 // Dual inheritance is catered for.
86
87 bool IsKindOf(const wxClassInfo *info) const
88 {
89 return info != 0 &&
90 ( info == this ||
91 ( m_baseInfo1 && m_baseInfo1->IsKindOf(info) ) ||
92 ( m_baseInfo2 && m_baseInfo2->IsKindOf(info) ) );
93 }
94
95 #if WXWIN_COMPATIBILITY_2_4
96 // Initializes parent pointers and hash table for fast searching.
97 wxDEPRECATED( static void InitializeClasses() );
98 // Cleans up hash table used for fast searching.
99 wxDEPRECATED( static void CleanUpClasses() );
100 #endif
101
102 public:
103 const wxChar *m_className;
104 int m_objectSize;
105 wxObjectConstructorFn m_objectConstructor;
106
107 // Pointers to base wxClassInfos: set in InitializeClasses
108
109 const wxClassInfo *m_baseInfo1;
110 const wxClassInfo *m_baseInfo2;
111
112 // class info object live in a linked list:
113 // pointers to its head and the next element in it
114
115 static wxClassInfo *sm_first;
116 wxClassInfo *m_next;
117
118 // FIXME: this should be private (currently used directly by way too
119 // many clients)
120 static wxHashTable *sm_classTable;
121
122 private:
123 // InitializeClasses() helper
124 static wxClassInfo *GetBaseByName(const wxChar *name);
125
126 DECLARE_NO_COPY_CLASS(wxClassInfo)
127
128 protected:
129 // registers the class
130 void Register();
131 void Unregister();
132 };
133
134 WXDLLIMPEXP_BASE wxObject *wxCreateDynamicObject(const wxChar *name);
135
136 #if WXWIN_COMPATIBILITY_2_4
137 inline void wxClassInfo::InitializeClasses() {}
138 inline void wxClassInfo::CleanUpClasses() {}
139 #endif
140
141 // ----------------------------------------------------------------------------
142 // Dynamic class macros
143 // ----------------------------------------------------------------------------
144
145 #define DECLARE_ABSTRACT_CLASS(name) \
146 public: \
147 static wxClassInfo ms_classInfo; \
148 virtual wxClassInfo *GetClassInfo() const;
149
150 #define DECLARE_DYNAMIC_CLASS_NO_ASSIGN(name) \
151 DECLARE_NO_ASSIGN_CLASS(name) \
152 DECLARE_DYNAMIC_CLASS(name)
153
154 #define DECLARE_DYNAMIC_CLASS_NO_COPY(name) \
155 DECLARE_NO_COPY_CLASS(name) \
156 DECLARE_DYNAMIC_CLASS(name)
157
158 #define DECLARE_DYNAMIC_CLASS(name) \
159 DECLARE_ABSTRACT_CLASS(name) \
160 static wxObject* wxCreateObject();
161
162 #define DECLARE_CLASS(name) DECLARE_DYNAMIC_CLASS(name)
163
164
165 // common part of the macros below
166 #define wxIMPLEMENT_CLASS_COMMON(name, basename, baseclsinfo2, func) \
167 wxClassInfo name::ms_classInfo(wxT(#name), \
168 &basename::ms_classInfo, \
169 baseclsinfo2, \
170 (int) sizeof(name), \
171 (wxObjectConstructorFn) func); \
172 \
173 wxClassInfo *name::GetClassInfo() const \
174 { return &name::ms_classInfo; }
175
176 #define wxIMPLEMENT_CLASS_COMMON1(name, basename, func) \
177 wxIMPLEMENT_CLASS_COMMON(name, basename, NULL, func)
178
179 #define wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, func) \
180 wxIMPLEMENT_CLASS_COMMON(name, basename1, &basename2::ms_classInfo, func)
181
182 // -----------------------------------
183 // for concrete classes
184 // -----------------------------------
185
186 // Single inheritance with one base class
187 #define IMPLEMENT_DYNAMIC_CLASS(name, basename) \
188 wxIMPLEMENT_CLASS_COMMON1(name, basename, name::wxCreateObject) \
189 wxObject* name::wxCreateObject() \
190 { return new name; }
191
192 // Multiple inheritance with two base classes
193 #define IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) \
194 wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, \
195 name::wxCreateObject) \
196 wxObject* name::wxCreateObject() \
197 { return new name; }
198
199 // -----------------------------------
200 // for abstract classes
201 // -----------------------------------
202
203 // Single inheritance with one base class
204
205 #define IMPLEMENT_ABSTRACT_CLASS(name, basename) \
206 wxIMPLEMENT_CLASS_COMMON1(name, basename, NULL)
207
208 // Multiple inheritance with two base classes
209
210 #define IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) \
211 wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, NULL)
212
213 #define IMPLEMENT_CLASS IMPLEMENT_ABSTRACT_CLASS
214 #define IMPLEMENT_CLASS2 IMPLEMENT_ABSTRACT_CLASS2
215
216 #endif // !wxUSE_EXTENDED_RTTI
217
218
219 // -----------------------------------
220 // for pluggable classes
221 // -----------------------------------
222
223 // NOTE: this should probably be the very first statement
224 // in the class declaration so wxPluginSentinel is
225 // the first member initialised and the last destroyed.
226
227 // _DECLARE_DL_SENTINEL(name) wxPluginSentinel m_pluginsentinel;
228
229 #if wxUSE_NESTED_CLASSES
230
231 #define _DECLARE_DL_SENTINEL(name, exportdecl) \
232 class exportdecl name##PluginSentinel { \
233 private: \
234 static const wxString sm_className; \
235 public: \
236 name##PluginSentinel(); \
237 ~name##PluginSentinel(); \
238 }; \
239 name##PluginSentinel m_pluginsentinel;
240
241 #define _IMPLEMENT_DL_SENTINEL(name) \
242 const wxString name::name##PluginSentinel::sm_className(#name); \
243 name::name##PluginSentinel::name##PluginSentinel() { \
244 wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
245 if( e != 0 ) { e->RefObj(); } \
246 } \
247 name::name##PluginSentinel::~name##PluginSentinel() { \
248 wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
249 if( e != 0 ) { e->UnrefObj(); } \
250 }
251 #else
252
253 #define _DECLARE_DL_SENTINEL(name)
254 #define _IMPLEMENT_DL_SENTINEL(name)
255
256 #endif // wxUSE_NESTED_CLASSES
257
258 #define DECLARE_PLUGGABLE_CLASS(name) \
259 DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT)
260 #define DECLARE_ABSTRACT_PLUGGABLE_CLASS(name) \
261 DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT)
262
263 #define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) \
264 DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo)
265 #define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo) \
266 DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo)
267
268 #define IMPLEMENT_PLUGGABLE_CLASS(name, basename) \
269 IMPLEMENT_DYNAMIC_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
270 #define IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) \
271 IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
272 #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
273 IMPLEMENT_ABSTRACT_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
274 #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
275 IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
276
277 #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) \
278 IMPLEMENT_PLUGGABLE_CLASS(name, basename)
279 #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2) \
280 IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2)
281 #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
282 IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename)
283 #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
284 IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)
285
286 #define CLASSINFO(name) (&name::ms_classInfo)
287
288 #define wxIS_KIND_OF(obj, className) obj->IsKindOf(&className::ms_classInfo)
289
290 // Just seems a bit nicer-looking (pretend it's not a macro)
291 #define wxIsKindOf(obj, className) obj->IsKindOf(&className::ms_classInfo)
292
293 // this cast does some more checks at compile time as it uses static_cast
294 // internally
295 //
296 // note that it still has different semantics from dynamic_cast<> and so can't
297 // be replaced by it as long as there are any compilers not supporting it
298 #define wxDynamicCast(obj, className) \
299 ((className *) wxCheckDynamicCast( \
300 wx_const_cast(wxObject *, wx_static_cast(const wxObject *, \
301 wx_const_cast(className *, wx_static_cast(const className *, obj)))), \
302 &className::ms_classInfo))
303
304 // The 'this' pointer is always true, so use this version
305 // to cast the this pointer and avoid compiler warnings.
306 #define wxDynamicCastThis(className) \
307 (IsKindOf(&className::ms_classInfo) ? (className *)(this) : (className *)0)
308
309 #ifdef __WXDEBUG__
310 inline void* wxCheckCast(void *ptr)
311 {
312 wxASSERT_MSG( ptr, _T("wxStaticCast() used incorrectly") );
313 return ptr;
314 }
315 #define wxStaticCast(obj, className) \
316 ((className *)wxCheckCast(wxDynamicCast(obj, className)))
317
318 #else // !__WXDEBUG__
319 #define wxStaticCast(obj, className) \
320 wx_const_cast(className *, wx_static_cast(const className *, obj))
321
322 #endif // __WXDEBUG__
323
324 // ----------------------------------------------------------------------------
325 // set up memory debugging macros
326 // ----------------------------------------------------------------------------
327
328 /*
329 Which new/delete operator variants do we want?
330
331 _WX_WANT_NEW_SIZET_WXCHAR_INT = void *operator new (size_t size, wxChar *fileName = 0, int lineNum = 0)
332 _WX_WANT_DELETE_VOID = void operator delete (void * buf)
333 _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET = void operator delete (void *buf, const char *_fname, size_t _line)
334 _WX_WANT_DELETE_VOID_WXCHAR_INT = void operator delete(void *buf, wxChar*, int)
335 _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT = void *operator new[] (size_t size, wxChar *fileName , int lineNum = 0)
336 _WX_WANT_ARRAY_DELETE_VOID = void operator delete[] (void *buf)
337 _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT = void operator delete[] (void* buf, wxChar*, int )
338 */
339
340 #if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING
341
342 // All compilers get this one
343 #define _WX_WANT_NEW_SIZET_WXCHAR_INT
344
345 // Everyone except Visage gets the next one
346 #ifndef __VISAGECPP__
347 #define _WX_WANT_DELETE_VOID
348 #endif
349
350 // Only visage gets this one under the correct circumstances
351 #if defined(__VISAGECPP__) && __DEBUG_ALLOC__
352 #define _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
353 #endif
354
355 // Only VC++ 6.0 and CodeWarrior compilers get overloaded delete that matches new
356 #if ( defined(__VISUALC__) && (__VISUALC__ >= 1200) ) || (defined(__MWERKS__) && (__MWERKS__ >= 0x2400))
357 #define _WX_WANT_DELETE_VOID_WXCHAR_INT
358 #endif
359
360 // Now see who (if anyone) gets the array memory operators
361 #if wxUSE_ARRAY_MEMORY_OPERATORS
362
363 // Everyone except Visual C++ (cause problems for VC++ - crashes)
364 #if !defined(__VISUALC__)
365 #define _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
366 #endif
367
368 // Everyone except Visual C++ (cause problems for VC++ - crashes)
369 #if !defined(__VISUALC__)
370 #define _WX_WANT_ARRAY_DELETE_VOID
371 #endif
372
373 // Only CodeWarrior 6 or higher
374 #if defined(__MWERKS__) && (__MWERKS__ >= 0x2400)
375 #define _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
376 #endif
377
378 #endif // wxUSE_ARRAY_MEMORY_OPERATORS
379
380 #endif // __WXDEBUG__ && wxUSE_MEMORY_TRACING
381
382 // ----------------------------------------------------------------------------
383 // wxObjectRefData: ref counted data meant to be stored in wxObject
384 // ----------------------------------------------------------------------------
385
386 class WXDLLIMPEXP_BASE wxObjectRefData
387 {
388 friend class WXDLLIMPEXP_BASE wxObject;
389
390 public:
391 wxObjectRefData() : m_count(1) { }
392 virtual ~wxObjectRefData() { }
393
394 int GetRefCount() const { return m_count; }
395
396 private:
397 int m_count;
398 };
399
400 // ----------------------------------------------------------------------------
401 // wxObject: the root class of wxWidgets object hierarchy
402 // ----------------------------------------------------------------------------
403
404 class WXDLLIMPEXP_BASE wxObject
405 {
406 DECLARE_ABSTRACT_CLASS(wxObject)
407
408 public:
409 wxObject() { m_refData = NULL; }
410 virtual ~wxObject() { UnRef(); }
411
412 wxObject(const wxObject& other)
413 {
414 m_refData = other.m_refData;
415 if (m_refData)
416 m_refData->m_count++;
417 }
418
419 wxObject& operator=(const wxObject& other)
420 {
421 if ( this != &other )
422 {
423 Ref(other);
424 }
425 return *this;
426 }
427
428 bool IsKindOf(wxClassInfo *info) const;
429
430
431 // Turn on the correct set of new and delete operators
432
433 #ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT
434 void *operator new ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 );
435 #endif
436
437 #ifdef _WX_WANT_DELETE_VOID
438 void operator delete ( void * buf );
439 #endif
440
441 #ifdef _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
442 void operator delete ( void *buf, const char *_fname, size_t _line );
443 #endif
444
445 #ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT
446 void operator delete ( void *buf, const wxChar*, int );
447 #endif
448
449 #ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
450 void *operator new[] ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 );
451 #endif
452
453 #ifdef _WX_WANT_ARRAY_DELETE_VOID
454 void operator delete[] ( void *buf );
455 #endif
456
457 #ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
458 void operator delete[] (void* buf, const wxChar*, int );
459 #endif
460
461 // ref counted data handling methods
462
463 // get/set
464 wxObjectRefData *GetRefData() const { return m_refData; }
465 void SetRefData(wxObjectRefData *data) { m_refData = data; }
466
467 // make a 'clone' of the object
468 void Ref(const wxObject& clone);
469
470 // destroy a reference
471 void UnRef();
472
473 // Make sure this object has only one reference
474 void UnShare() { AllocExclusive(); }
475
476 protected:
477 // ensure that our data is not shared with anybody else: if we have no
478 // data, it is created using CreateRefData() below, if we have shared data
479 // it is copied using CloneRefData(), otherwise nothing is done
480 void AllocExclusive();
481
482 // both methods must be implemented if AllocExclusive() is used, not pure virtual
483 // only because of the backwards compatibility reasons
484
485 // create a new m_refData
486 virtual wxObjectRefData *CreateRefData() const;
487
488 // create a new m_refData initialized with the given one
489 virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
490
491 wxObjectRefData *m_refData;
492 };
493
494 inline wxObject *wxCheckDynamicCast(wxObject *obj, wxClassInfo *classInfo)
495 {
496 return obj && obj->GetClassInfo()->IsKindOf(classInfo) ? obj : NULL;
497 }
498
499 #if wxUSE_EXTENDED_RTTI
500 class WXDLLIMPEXP_BASE wxDynamicObject : public wxObject
501 {
502 friend class WXDLLIMPEXP_BASE wxDynamicClassInfo ;
503 public:
504 // instantiates this object with an instance of its superclass
505 wxDynamicObject(wxObject* superClassInstance, const wxDynamicClassInfo *info) ;
506 virtual ~wxDynamicObject();
507
508 void SetProperty (const wxChar *propertyName, const wxxVariant &value);
509 wxxVariant GetProperty (const wxChar *propertyName) const ;
510
511 // get the runtime identity of this object
512 wxClassInfo *GetClassInfo() const
513 {
514 #ifdef _MSC_VER
515 return (wxClassInfo*) m_classInfo;
516 #else
517 return wx_const_cast(wxClassInfo *, m_classInfo);
518 #endif
519 }
520
521 wxObject* GetSuperClassInstance() const
522 {
523 return m_superClassInstance ;
524 }
525 private :
526 // removes an existing runtime-property
527 void RemoveProperty( const wxChar *propertyName ) ;
528
529 // renames an existing runtime-property
530 void RenameProperty( const wxChar *oldPropertyName , const wxChar *newPropertyName ) ;
531
532 wxObject *m_superClassInstance ;
533 const wxDynamicClassInfo *m_classInfo;
534 struct wxDynamicObjectInternal;
535 wxDynamicObjectInternal *m_data;
536 };
537 #endif
538
539 // ----------------------------------------------------------------------------
540 // more debugging macros
541 // ----------------------------------------------------------------------------
542
543 #ifdef __WXDEBUG__
544 #ifndef WXDEBUG_NEW
545 #define WXDEBUG_NEW new(__TFILE__,__LINE__)
546 #endif
547 #else // !__WXDEBUG__
548 #define WXDEBUG_NEW new
549 #endif
550
551 // Redefine new to be the debugging version. This doesn't work with all
552 // compilers, in which case you need to use WXDEBUG_NEW explicitly if you wish
553 // to use the debugging version.
554
555 #if defined(__WXDEBUG__) && wxUSE_GLOBAL_MEMORY_OPERATORS && wxUSE_DEBUG_NEW_ALWAYS
556 #define new new(__TFILE__,__LINE__)
557 #elif (defined(__WXDEBUG__) && defined(__VISUALC__) && !wxUSE_GLOBAL_MEMORY_OPERATORS && wxUSE_DEBUG_NEW_ALWAYS)
558 // Including this file redefines new and allows leak reports to contain line numbers
559 #include "wx/msw/msvcrt.h"
560 #endif
561
562 #endif // _WX_OBJECTH__