1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: wxObject class, plus run-time type information macros
4 // Author: Julian Smart
5 // Modified by: Ron Lee
8 // Copyright: (c) 1997 Julian Smart
9 // (c) 2001 Ron Lee <ron@debian.org>
10 // Licence: wxWindows licence
11 /////////////////////////////////////////////////////////////////////////////
16 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
17 #pragma interface "object.h"
20 // ----------------------------------------------------------------------------
22 // ----------------------------------------------------------------------------
25 #include "wx/memory.h"
27 class WXDLLIMPEXP_BASE wxObject
;
29 #ifndef wxUSE_EXTENDED_RTTI
30 #define wxUSE_EXTENDED_RTTI 0
33 #if wxUSE_EXTENDED_RTTI
37 // ----------------------------------------------------------------------------
38 // conditional compilation
39 // ----------------------------------------------------------------------------
41 // this shouldn't be needed any longer as <wx/msw/private.h> does it but it
42 // doesn't hurt neither
50 class WXDLLIMPEXP_BASE wxClassInfo
;
51 class WXDLLIMPEXP_BASE wxHashTable
;
52 class WXDLLIMPEXP_BASE wxObjectRefData
;
54 // ----------------------------------------------------------------------------
56 // ----------------------------------------------------------------------------
58 typedef wxObject
*(*wxObjectConstructorFn
)(void);
60 class WXDLLIMPEXP_BASE wxClassInfo
63 wxClassInfo( const wxChar
*className
,
64 const wxClassInfo
*baseInfo1
,
65 const wxClassInfo
*baseInfo2
,
67 wxObjectConstructorFn ctor
)
68 : m_className(className
)
70 , m_objectConstructor(ctor
)
71 , m_baseInfo1(baseInfo1
)
72 , m_baseInfo2(baseInfo2
)
81 wxObject
*CreateObject() { return m_objectConstructor
? (*m_objectConstructor
)() : 0; }
83 const wxChar
*GetClassName() const { return m_className
; }
84 const wxChar
*GetBaseClassName1() const
85 { return m_baseInfo1
? m_baseInfo1
->GetClassName() : NULL
; }
86 const wxChar
*GetBaseClassName2() const
87 { return m_baseInfo2
? m_baseInfo2
->GetClassName() : NULL
; }
88 const wxClassInfo
*GetBaseClass1() const { return m_baseInfo1
; }
89 const wxClassInfo
*GetBaseClass2() const { return m_baseInfo2
; }
90 int GetSize() const { return m_objectSize
; }
92 wxObjectConstructorFn
GetConstructor() const { return m_objectConstructor
; }
93 static const wxClassInfo
*GetFirst() { return sm_first
; }
94 const wxClassInfo
*GetNext() const { return m_next
; }
95 static wxClassInfo
*FindClass(const wxChar
*className
);
97 // Climb upwards through inheritance hierarchy.
98 // Dual inheritance is catered for.
100 bool IsKindOf(const wxClassInfo
*info
) const
104 ( m_baseInfo1
&& m_baseInfo1
->IsKindOf(info
) ) ||
105 ( m_baseInfo2
&& m_baseInfo2
->IsKindOf(info
) ) );
108 #if WXWIN_COMPATIBILITY_2_4
109 // Initializes parent pointers and hash table for fast searching.
110 wxDEPRECATED( static void InitializeClasses() );
111 // Cleans up hash table used for fast searching.
112 wxDEPRECATED( static void CleanUpClasses() );
114 static void CleanUp();
117 const wxChar
*m_className
;
119 wxObjectConstructorFn m_objectConstructor
;
121 // Pointers to base wxClassInfos: set in InitializeClasses
123 const wxClassInfo
*m_baseInfo1
;
124 const wxClassInfo
*m_baseInfo2
;
126 // class info object live in a linked list:
127 // pointers to its head and the next element in it
129 static wxClassInfo
*sm_first
;
132 // FIXME: this should be private (currently used directly by way too
134 static wxHashTable
*sm_classTable
;
137 // InitializeClasses() helper
138 static wxClassInfo
*GetBaseByName(const wxChar
*name
);
140 DECLARE_NO_COPY_CLASS(wxClassInfo
)
143 // registers the class
148 WXDLLIMPEXP_BASE wxObject
*wxCreateDynamicObject(const wxChar
*name
);
150 #if WXWIN_COMPATIBILITY_2_4
151 inline void wxClassInfo::InitializeClasses() {}
152 inline void wxClassInfo::CleanUpClasses() {}
155 // ----------------------------------------------------------------------------
156 // Dynamic class macros
157 // ----------------------------------------------------------------------------
159 #define DECLARE_ABSTRACT_CLASS(name) \
161 static wxClassInfo ms_classInfo; \
162 virtual wxClassInfo *GetClassInfo() const;
164 #define DECLARE_DYNAMIC_CLASS_NO_ASSIGN(name) \
165 DECLARE_NO_ASSIGN_CLASS(name) \
166 DECLARE_DYNAMIC_CLASS(name)
168 #define DECLARE_DYNAMIC_CLASS_NO_COPY(name) \
169 DECLARE_NO_COPY_CLASS(name) \
170 DECLARE_DYNAMIC_CLASS(name)
172 #define DECLARE_DYNAMIC_CLASS(name) \
173 DECLARE_ABSTRACT_CLASS(name) \
174 static wxObject* wxCreateObject();
176 #define DECLARE_CLASS(name) DECLARE_DYNAMIC_CLASS(name)
179 // common part of the macros below
180 #define wxIMPLEMENT_CLASS_COMMON(name, basename, baseclsinfo2, func) \
181 wxClassInfo name::ms_classInfo(wxT(#name), \
182 &basename::ms_classInfo, \
184 (int) sizeof(name), \
185 (wxObjectConstructorFn) func); \
187 wxClassInfo *name::GetClassInfo() const \
188 { return &name::ms_classInfo; }
190 #define wxIMPLEMENT_CLASS_COMMON1(name, basename, func) \
191 wxIMPLEMENT_CLASS_COMMON(name, basename, NULL, func)
193 #define wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, func) \
194 wxIMPLEMENT_CLASS_COMMON(name, basename1, &basename2::ms_classInfo)
196 // -----------------------------------
197 // for concrete classes
198 // -----------------------------------
200 // Single inheritance with one base class
201 #define IMPLEMENT_DYNAMIC_CLASS(name, basename) \
202 wxIMPLEMENT_CLASS_COMMON1(name, basename, name::wxCreateObject) \
203 wxObject* name::wxCreateObject() \
206 // Multiple inheritance with two base classes
207 #define IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) \
208 wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, \
209 name::wxCreateObject) \
210 wxObject* name::wxCreateObject() \
213 // -----------------------------------
214 // for abstract classes
215 // -----------------------------------
217 // Single inheritance with one base class
219 #define IMPLEMENT_ABSTRACT_CLASS(name, basename) \
220 wxIMPLEMENT_CLASS_COMMON1(name, basename, NULL)
222 // Multiple inheritance with two base classes
224 #define IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) \
225 wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, NULL)
227 #define IMPLEMENT_CLASS IMPLEMENT_ABSTRACT_CLASS
228 #define IMPLEMENT_CLASS2 IMPLEMENT_ABSTRACT_CLASS2
230 #endif // !wxUSE_EXTENDED_RTTI
233 // -----------------------------------
234 // for pluggable classes
235 // -----------------------------------
237 // NOTE: this should probably be the very first statement
238 // in the class declaration so wxPluginSentinel is
239 // the first member initialised and the last destroyed.
241 // _DECLARE_DL_SENTINEL(name) wxPluginSentinel m_pluginsentinel;
243 #if wxUSE_NESTED_CLASSES
245 #define _DECLARE_DL_SENTINEL(name, exportdecl) \
246 class exportdecl name##PluginSentinel { \
248 static const wxString sm_className; \
250 name##PluginSentinel(); \
251 ~name##PluginSentinel(); \
253 name##PluginSentinel m_pluginsentinel;
255 #define _IMPLEMENT_DL_SENTINEL(name) \
256 const wxString name::name##PluginSentinel::sm_className(#name); \
257 name::name##PluginSentinel::name##PluginSentinel() { \
258 wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
259 if( e != 0 ) { e->RefObj(); } \
261 name::name##PluginSentinel::~name##PluginSentinel() { \
262 wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
263 if( e != 0 ) { e->UnrefObj(); } \
267 #define _DECLARE_DL_SENTINEL(name)
268 #define _IMPLEMENT_DL_SENTINEL(name)
270 #endif // wxUSE_NESTED_CLASSES
272 #define DECLARE_PLUGGABLE_CLASS(name) \
273 DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT)
274 #define DECLARE_ABSTRACT_PLUGGABLE_CLASS(name) \
275 DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT)
277 #define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) \
278 DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo)
279 #define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo) \
280 DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo)
282 #define IMPLEMENT_PLUGGABLE_CLASS(name, basename) \
283 IMPLEMENT_DYNAMIC_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
284 #define IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) \
285 IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
286 #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
287 IMPLEMENT_ABSTRACT_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
288 #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
289 IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
291 #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) \
292 IMPLEMENT_PLUGGABLE_CLASS(name, basename)
293 #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2) \
294 IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2)
295 #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
296 IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename)
297 #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
298 IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)
300 #define CLASSINFO(name) (&name::ms_classInfo)
302 #define wxIS_KIND_OF(obj, className) obj->IsKindOf(&className::ms_classInfo)
304 // Just seems a bit nicer-looking (pretend it's not a macro)
305 #define wxIsKindOf(obj, className) obj->IsKindOf(&className::ms_classInfo)
307 // this cast does some more checks at compile time as it uses static_cast
310 // note that it still has different semantics from dynamic_cast<> and so can't
311 // be replaced by it as long as there are any compilers not supporting it
312 #define wxDynamicCast(obj, className) \
313 ((className *) wxCheckDynamicCast( \
314 wx_const_cast(wxObject *, wx_static_cast(const wxObject *, \
315 wx_const_cast(className *, wx_static_cast(const className *, obj)))), \
316 &className::ms_classInfo))
318 // The 'this' pointer is always true, so use this version
319 // to cast the this pointer and avoid compiler warnings.
320 #define wxDynamicCastThis(className) \
321 (IsKindOf(&className::ms_classInfo) ? (className *)(this) : (className *)0)
324 inline void* wxCheckCast(void *ptr
)
326 wxASSERT_MSG( ptr
, _T("wxStaticCast() used incorrectly") );
329 #define wxStaticCast(obj, className) \
330 ((className *)wxCheckCast(wxDynamicCast(obj, className)))
332 #else // !__WXDEBUG__
333 #define wxStaticCast(obj, className) \
334 wx_const_cast(className *, wx_static_cast(const className *, obj))
336 #endif // __WXDEBUG__
338 // ----------------------------------------------------------------------------
339 // set up memory debugging macros
340 // ----------------------------------------------------------------------------
343 Which new/delete operator variants do we want?
345 _WX_WANT_NEW_SIZET_WXCHAR_INT = void *operator new (size_t size, wxChar *fileName = 0, int lineNum = 0)
346 _WX_WANT_DELETE_VOID = void operator delete (void * buf)
347 _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET = void operator delete (void *buf, const char *_fname, size_t _line)
348 _WX_WANT_DELETE_VOID_WXCHAR_INT = void operator delete(void *buf, wxChar*, int)
349 _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT = void *operator new[] (size_t size, wxChar *fileName , int lineNum = 0)
350 _WX_WANT_ARRAY_DELETE_VOID = void operator delete[] (void *buf)
351 _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT = void operator delete[] (void* buf, wxChar*, int )
354 #if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING
356 // All compilers get this one
357 #define _WX_WANT_NEW_SIZET_WXCHAR_INT
359 // Everyone except Visage gets the next one
360 #ifndef __VISAGECPP__
361 #define _WX_WANT_DELETE_VOID
364 // Only visage gets this one under the correct circumstances
365 #if defined(__VISAGECPP__) && __DEBUG_ALLOC__
366 #define _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
369 // Only VC++ 6.0 and CodeWarrior compilers get overloaded delete that matches new
370 #if ( defined(__VISUALC__) && (__VISUALC__ >= 1200) ) || (defined(__MWERKS__) && (__MWERKS__ >= 0x2400))
371 #define _WX_WANT_DELETE_VOID_WXCHAR_INT
374 // Now see who (if anyone) gets the array memory operators
375 #if wxUSE_ARRAY_MEMORY_OPERATORS
377 // Everyone except Visual C++ (cause problems for VC++ - crashes)
378 #if !defined(__VISUALC__)
379 #define _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
382 // Everyone except Visual C++ (cause problems for VC++ - crashes)
383 #if !defined(__VISUALC__)
384 #define _WX_WANT_ARRAY_DELETE_VOID
387 // Only CodeWarrior 6 or higher
388 #if defined(__MWERKS__) && (__MWERKS__ >= 0x2400)
389 #define _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
392 #endif // wxUSE_ARRAY_MEMORY_OPERATORS
394 #endif // WXDEBUG && wxUSE_MEMORY_TRACING
396 // ----------------------------------------------------------------------------
397 // wxObject: the root class of wxWidgets object hierarchy
398 // ----------------------------------------------------------------------------
400 class WXDLLIMPEXP_BASE wxObject
402 DECLARE_ABSTRACT_CLASS(wxObject
)
405 void InitFrom(const wxObject
& other
);
408 wxObject() { m_refData
= NULL
; }
409 virtual ~wxObject() { UnRef(); }
411 wxObject(const wxObject
& other
)
416 wxObject
& operator=(const wxObject
& other
)
418 if ( this != &other
)
426 bool IsKindOf(wxClassInfo
*info
) const;
429 // Turn on the correct set of new and delete operators
431 #ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT
432 void *operator new ( size_t size
, const wxChar
*fileName
= NULL
, int lineNum
= 0 );
435 #ifdef _WX_WANT_DELETE_VOID
436 void operator delete ( void * buf
);
439 #ifdef _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
440 void operator delete ( void *buf
, const char *_fname
, size_t _line
);
443 #ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT
444 void operator delete ( void *buf
, const wxChar
*, int );
447 #ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
448 void *operator new[] ( size_t size
, const wxChar
*fileName
= NULL
, int lineNum
= 0 );
451 #ifdef _WX_WANT_ARRAY_DELETE_VOID
452 void operator delete[] ( void *buf
);
455 #ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
456 void operator delete[] (void* buf
, const wxChar
*, int );
459 // ref counted data handling methods
462 wxObjectRefData
*GetRefData() const { return m_refData
; }
463 void SetRefData(wxObjectRefData
*data
) { m_refData
= data
; }
465 // make a 'clone' of the object
466 void Ref(const wxObject
& clone
);
468 // destroy a reference
472 // ensure that our data is not shared with anybody else: if we have no
473 // data, it is created using CreateRefData() below, if we have shared data
474 // it is copied using CloneRefData(), otherwise nothing is done
475 void AllocExclusive();
477 // both methods must be implemented if Unshare() is used, not pure virtual
478 // only because of the backwards compatibility reasons
480 // create a new m_refData
481 virtual wxObjectRefData
*CreateRefData() const;
483 // create a new m_refData initialized with the given one
484 virtual wxObjectRefData
*CloneRefData(const wxObjectRefData
*data
) const;
486 wxObjectRefData
*m_refData
;
489 // ----------------------------------------------------------------------------
490 // wxObjectRefData: ref counted data meant to be stored in wxObject
491 // ----------------------------------------------------------------------------
493 class WXDLLIMPEXP_BASE wxObjectRefData
495 friend class WXDLLIMPEXP_BASE wxObject
;
498 wxObjectRefData() : m_count(1) { }
499 virtual ~wxObjectRefData() { }
501 int GetRefCount() const { return m_count
; }
508 inline wxObject
*wxCheckDynamicCast(wxObject
*obj
, wxClassInfo
*classInfo
)
510 return obj
&& obj
->GetClassInfo()->IsKindOf(classInfo
) ? obj
: NULL
;
513 #if wxUSE_EXTENDED_RTTI
514 class WXDLLIMPEXP_BASE wxDynamicObject
: public wxObject
516 friend class WXDLLIMPEXP_BASE wxDynamicClassInfo
;
518 // instantiates this object with an instance of its superclass
519 wxDynamicObject(wxObject
* superClassInstance
, const wxDynamicClassInfo
*info
) ;
522 void SetProperty (const wxChar
*propertyName
, const wxxVariant
&value
);
523 wxxVariant
GetProperty (const wxChar
*propertyName
) const ;
525 // get the runtime identity of this object
526 wxClassInfo
*GetClassInfo() const
529 return (wxClassInfo
*) m_classInfo
;
531 return wx_const_cast(wxClassInfo
*, m_classInfo
);
535 wxObject
* GetSuperClassInstance() const
537 return m_superClassInstance
;
540 // removes an existing runtime-property
541 void RemoveProperty( const wxChar
*propertyName
) ;
543 // renames an existing runtime-property
544 void RenameProperty( const wxChar
*oldPropertyName
, const wxChar
*newPropertyName
) ;
546 wxObject
*m_superClassInstance
;
547 const wxDynamicClassInfo
*m_classInfo
;
548 struct wxDynamicObjectInternal
;
549 wxDynamicObjectInternal
*m_data
;
553 // ----------------------------------------------------------------------------
554 // more debugging macros
555 // ----------------------------------------------------------------------------
559 #define WXDEBUG_NEW new(__TFILE__,__LINE__)
561 #else // !__WXDEBUG__
562 #define WXDEBUG_NEW new
565 // Redefine new to be the debugging version. This doesn't work with all
566 // compilers, in which case you need to use WXDEBUG_NEW explicitly if you wish
567 // to use the debugging version.
569 #if defined(__WXDEBUG__) && wxUSE_GLOBAL_MEMORY_OPERATORS && wxUSE_DEBUG_NEW_ALWAYS
570 #define new new(__TFILE__,__LINE__)
571 #elif (defined(__WXDEBUG__) && defined(__VISUALC__) && !wxUSE_GLOBAL_MEMORY_OPERATORS && wxUSE_DEBUG_NEW_ALWAYS)
572 // Including this file redefines new and allows leak reports to contain line numbers
573 #include "wx/msw/msvcrt.h"
576 #endif // _WX_OBJECTH__