include/wx/object.h

   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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  17 #pragma interface "object.h"
  18 #endif
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 #include "wx/defs.h"
  25 #include "wx/memory.h"
  26
  27 class WXDLLIMPEXP_BASE wxObject;
  28
  29 #if wxUSE_DYNAMIC_CLASSES
  30
  31 #ifndef wxUSE_EXTENDED_RTTI
  32 #define wxUSE_EXTENDED_RTTI 0
  33 #endif
  34
  35 #if wxUSE_EXTENDED_RTTI
  36 #include "wx/xti.h"
  37 #else
  38
  39 // ----------------------------------------------------------------------------
  40 // conditional compilation
  41 // ----------------------------------------------------------------------------
  42
  43 // this shouldn't be needed any longer as <wx/msw/private.h> does it but it
  44 // doesn't hurt neither
  45 #ifdef GetClassName
  46 #undef GetClassName
  47 #endif
  48 #ifdef GetClassInfo
  49 #undef GetClassInfo
  50 #endif
  51
  52 class WXDLLIMPEXP_BASE wxClassInfo;
  53 class WXDLLIMPEXP_BASE wxHashTable;
  54 class WXDLLIMPEXP_BASE wxObjectRefData;
  55
  56 // ----------------------------------------------------------------------------
  57 // wxClassInfo
  58 // ----------------------------------------------------------------------------
  59
  60 typedef wxObject *(*wxObjectConstructorFn)(void);
  61
  62 class WXDLLIMPEXP_BASE wxClassInfo
  63 {
  64 public:
  65     wxClassInfo( const wxChar *className,
  66                  const wxClassInfo *baseInfo1,
  67                  const wxClassInfo *baseInfo2,
  68                  int size,
  69                  wxObjectConstructorFn ctor )
  70         : m_className(className)
  71         , m_objectSize(size)
  72         , m_objectConstructor(ctor)
  73         , m_baseInfo1(baseInfo1)
  74         , m_baseInfo2(baseInfo2)
  75         , m_next(sm_first)
  76         {
  77             sm_first = this;
  78             Register();
  79         }
  80
  81     ~wxClassInfo();
  82
  83     wxObject *CreateObject() { return m_objectConstructor ? (*m_objectConstructor)() : 0; }
  84
  85     const wxChar       *GetClassName() const { return m_className; }
  86     const wxChar       *GetBaseClassName1() const { return m_baseInfo1->GetClassName(); }
  87     const wxChar       *GetBaseClassName2() const { return m_baseInfo2->GetClassName(); }
  88     const wxClassInfo  *GetBaseClass1() const { return m_baseInfo1; }
  89     const wxClassInfo  *GetBaseClass2() const { return m_baseInfo2; }
  90     int                 GetSize() const { return m_objectSize; }
  91
  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);
  96
  97         // Climb upwards through inheritance hierarchy.
  98         // Dual inheritance is catered for.
  99
 100     bool IsKindOf(const wxClassInfo *info) const
 101     {
 102         return info != 0 &&
 103                ( info == this ||
 104                  ( m_baseInfo1 && m_baseInfo1->IsKindOf(info) ) ||
 105                  ( m_baseInfo2 && m_baseInfo2->IsKindOf(info) ) );
 106     }
 107
 108 #ifdef 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() );
 113 #endif
 114     static void     CleanUp();
 115
 116 public:
 117     const wxChar            *m_className;
 118     int                      m_objectSize;
 119     wxObjectConstructorFn    m_objectConstructor;
 120
 121         // Pointers to base wxClassInfos: set in InitializeClasses
 122
 123     const wxClassInfo       *m_baseInfo1;
 124     const wxClassInfo       *m_baseInfo2;
 125
 126         // class info object live in a linked list:
 127         // pointers to its head and the next element in it
 128
 129     static wxClassInfo      *sm_first;
 130     wxClassInfo             *m_next;
 131
 132     // FIXME: this should be private (currently used directly by way too
 133     //        many clients)
 134     static wxHashTable      *sm_classTable;
 135
 136 private:
 137     // InitializeClasses() helper
 138     static wxClassInfo *GetBaseByName(const wxChar *name);
 139
 140     DECLARE_NO_COPY_CLASS(wxClassInfo)
 141
 142 protected:
 143     // registers the class
 144     void Register();
 145     void Unregister();
 146 };
 147
 148 WXDLLIMPEXP_BASE wxObject *wxCreateDynamicObject(const wxChar *name);
 149
 150 #ifdef WXWIN_COMPATIBILITY_2_4
 151 inline void wxClassInfo::InitializeClasses() {}
 152 inline void wxClassInfo::CleanUpClasses() {}
 153 #endif
 154
 155 // ----------------------------------------------------------------------------
 156 // Dynamic class macros
 157 // ----------------------------------------------------------------------------
 158
 159 #define DECLARE_DYNAMIC_CLASS(name)           \
 160  public:                                      \
 161   static wxClassInfo sm_class##name;          \
 162   virtual wxClassInfo *GetClassInfo() const   \
 163    { return &name::sm_class##name; }
 164
 165 #define DECLARE_DYNAMIC_CLASS_NO_ASSIGN(name)   \
 166     DECLARE_NO_ASSIGN_CLASS(name)               \
 167     DECLARE_DYNAMIC_CLASS(name)
 168
 169 #define DECLARE_DYNAMIC_CLASS_NO_COPY(name)   \
 170     DECLARE_NO_COPY_CLASS(name)               \
 171     DECLARE_DYNAMIC_CLASS(name)
 172
 173 #define DECLARE_ABSTRACT_CLASS(name) DECLARE_DYNAMIC_CLASS(name)
 174 #define DECLARE_CLASS(name) DECLARE_DYNAMIC_CLASS(name)
 175
 176 // -----------------------------------
 177 // for concrete classes
 178 // -----------------------------------
 179
 180     // Single inheritance with one base class
 181
 182 #define IMPLEMENT_DYNAMIC_CLASS(name, basename)                 \
 183  wxObject* wxConstructorFor##name()                             \
 184   { return new name; }                                          \
 185  wxClassInfo name::sm_class##name(wxT(#name),                   \
 186             &basename::sm_class##basename, NULL,                \
 187             (int) sizeof(name),                                 \
 188             (wxObjectConstructorFn) wxConstructorFor##name);
 189
 190     // Multiple inheritance with two base classes
 191
 192 #define IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2)    \
 193  wxObject* wxConstructorFor##name()                             \
 194   { return new name; }                                          \
 195  wxClassInfo name::sm_class##name(wxT(#name),                   \
 196             &basename1::sm_class##basename1,                    \
 197             &basename2::sm_class##basename2,                    \
 198             wxT(#basename2), (int) sizeof(name),                \
 199             (wxObjectConstructorFn) wxConstructorFor##name);
 200
 201 // -----------------------------------
 202 // for abstract classes
 203 // -----------------------------------
 204
 205     // Single inheritance with one base class
 206
 207 #define IMPLEMENT_ABSTRACT_CLASS(name, basename)                \
 208  wxClassInfo name::sm_class##name(wxT(#name),                   \
 209             &basename::sm_class##basename, NULL,                \
 210             (int) sizeof(name), (wxObjectConstructorFn) 0);
 211
 212     // Multiple inheritance with two base classes
 213
 214 #define IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2)   \
 215  wxClassInfo name::sm_class##name(wxT(#name),                   \
 216             &basename1::sm_class##basename1,                    \
 217             &basename2::sm_class##basename2,                    \
 218             (int) sizeof(name),                                 \
 219             (wxObjectConstructorFn) 0);
 220
 221 #define IMPLEMENT_CLASS IMPLEMENT_ABSTRACT_CLASS
 222 #define IMPLEMENT_CLASS2 IMPLEMENT_ABSTRACT_CLASS2
 223
 224 #endif // !wxUSE_EXTENDED_RTTI
 225
 226
 227 // -----------------------------------
 228 // for pluggable classes
 229 // -----------------------------------
 230
 231     // NOTE: this should probably be the very first statement
 232     //       in the class declaration so wxPluginSentinel is
 233     //       the first member initialised and the last destroyed.
 234
 235 // _DECLARE_DL_SENTINEL(name) wxPluginSentinel m_pluginsentinel;
 236
 237 #if wxUSE_NESTED_CLASSES
 238
 239 #define _DECLARE_DL_SENTINEL(name, exportdecl)  \
 240 class exportdecl name##PluginSentinel {         \
 241 private:                                        \
 242     static const wxString sm_className;         \
 243 public:                                         \
 244     name##PluginSentinel();                     \
 245     ~name##PluginSentinel();                    \
 246 };                                              \
 247 name##PluginSentinel  m_pluginsentinel;
 248
 249 #define _IMPLEMENT_DL_SENTINEL(name)                                \
 250  const wxString name::name##PluginSentinel::sm_className(#name);    \
 251  name::name##PluginSentinel::name##PluginSentinel() {               \
 252     wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name);   \
 253     if( e != 0 ) { e->RefObj(); }                                      \
 254  }                                                                  \
 255  name::name##PluginSentinel::~name##PluginSentinel() {            \
 256     wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name);   \
 257     if( e != 0 ) { e->UnrefObj(); }                                 \
 258  }
 259 #else
 260
 261 #define _DECLARE_DL_SENTINEL(name)
 262 #define _IMPLEMENT_DL_SENTINEL(name)
 263
 264 #endif  // wxUSE_NESTED_CLASSES
 265
 266 #define DECLARE_PLUGGABLE_CLASS(name) \
 267  DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT)
 268 #define DECLARE_ABSTRACT_PLUGGABLE_CLASS(name)  \
 269  DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT)
 270
 271 #define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) \
 272  DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo)
 273 #define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo)  \
 274  DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo)
 275
 276 #define IMPLEMENT_PLUGGABLE_CLASS(name, basename) \
 277  IMPLEMENT_DYNAMIC_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
 278 #define IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2)  \
 279  IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
 280 #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
 281  IMPLEMENT_ABSTRACT_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
 282 #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)  \
 283  IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
 284
 285 #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) \
 286  IMPLEMENT_PLUGGABLE_CLASS(name, basename)
 287 #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2)  \
 288  IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2)
 289 #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
 290  IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename)
 291 #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)  \
 292  IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)
 293
 294 #define CLASSINFO(name) (&name::sm_class##name)
 295
 296 #else // !wxUSE_DYNAMIC_CLASSES
 297
 298     // No dynamic class system: so stub out the macros
 299
 300 #define DECLARE_DYNAMIC_CLASS(name)
 301 #define DECLARE_ABSTRACT_CLASS(name)
 302 #define DECLARE_CLASS(name)
 303 #define IMPLEMENT_DYNAMIC_CLASS(name, basename)
 304 #define IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2)
 305 #define IMPLEMENT_ABSTRACT_CLASS(name, basename)
 306 #define IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2)
 307 #define IMPLEMENT_CLASS IMPLEMENT_ABSTRACT_CLASS
 308 #define IMPLEMENT_CLASS2 IMPLEMENT_ABSTRACT_CLASS2
 309
 310 #define DECLARE_PLUGGABLE_CLASS(name)
 311 #define DECLARE_ABSTRACT_PLUGGABLE_CLASS(name)
 312 #define IMPLEMENT_PLUGGABLE_CLASS(name, basename)
 313 #define IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2)
 314 #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename)
 315 #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)
 316
 317 #define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo)
 318 #define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo)
 319 #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename)
 320 #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2)
 321 #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename)
 322 #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)
 323
 324 #endif // wxUSE_DYNAMIC_CLASSES
 325
 326 #define wxIS_KIND_OF(obj, className) obj->IsKindOf(&className::sm_class##className)
 327
 328 // Just seems a bit nicer-looking (pretend it's not a macro)
 329 #define wxIsKindOf(obj, className) obj->IsKindOf(&className::sm_class##className)
 330
 331 // to be replaced by dynamic_cast<> in the future
 332 #define wxDynamicCast(obj, className) \
 333  ((className *) wxCheckDynamicCast((wxObject*)(obj), &className::sm_class##className))
 334
 335 // The 'this' pointer is always true, so use this version
 336 // to cast the this pointer and avoid compiler warnings.
 337 #define wxDynamicCastThis(className) \
 338  (IsKindOf(&className::sm_class##className) ? (className *)(this) : (className *)0)
 339
 340 #ifdef HAVE_CONST_CAST
 341 #define wxConstCast(obj, className) const_cast<className *>(obj)
 342 #else
 343 #define wxConstCast(obj, className) ((className *)(obj))
 344 #endif
 345
 346
 347 #ifdef __WXDEBUG__
 348 inline void wxCheckCast(void *ptr)
 349 {
 350     wxASSERT_MSG( ptr, _T("wxStaticCast() used incorrectly") );
 351 }
 352 #define wxStaticCast(obj, className) \
 353  (wxCheckCast(wxDynamicCast(obj, className)), ((className *)(obj)))
 354
 355 #else  // !__WXDEBUG__
 356 #define wxStaticCast(obj, className) ((className *)(obj))
 357
 358 #endif  // __WXDEBUG__
 359
 360 // ----------------------------------------------------------------------------
 361 // set up memory debugging macros
 362 // ----------------------------------------------------------------------------
 363
 364 /*
 365     Which new/delete operator variants do we want?
 366
 367     _WX_WANT_NEW_SIZET_WXCHAR_INT             = void *operator new (size_t size, wxChar *fileName = 0, int lineNum = 0)
 368     _WX_WANT_DELETE_VOID                      = void operator delete (void * buf)
 369     _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET      = void operator delete (void *buf, const char *_fname, size_t _line)
 370     _WX_WANT_DELETE_VOID_WXCHAR_INT           = void operator delete(void *buf, wxChar*, int)
 371     _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT       = void *operator new[] (size_t size, wxChar *fileName , int lineNum = 0)
 372     _WX_WANT_ARRAY_DELETE_VOID                = void operator delete[] (void *buf)
 373     _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT     = void operator delete[] (void* buf, wxChar*, int )
 374 */
 375
 376 #if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING
 377
 378 // All compilers get this one
 379 #define _WX_WANT_NEW_SIZET_WXCHAR_INT
 380
 381 // Everyone except Visage gets the next one
 382 #ifndef __VISAGECPP__
 383     #define _WX_WANT_DELETE_VOID
 384 #endif
 385
 386 // Only visage gets this one under the correct circumstances
 387 #if defined(__VISAGECPP__) && __DEBUG_ALLOC__
 388     #define _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
 389 #endif
 390
 391 // Only VC++ 6.0 and CodeWarrior compilers get overloaded delete that matches new
 392 #if ( defined(__VISUALC__) && (__VISUALC__ >= 1200) ) || (defined(__MWERKS__) && (__MWERKS__ >= 0x2400))
 393     #define _WX_WANT_DELETE_VOID_WXCHAR_INT
 394 #endif
 395
 396 // Now see who (if anyone) gets the array memory operators
 397 #if wxUSE_ARRAY_MEMORY_OPERATORS
 398
 399     // Everyone except Visual C++ (cause problems for VC++ - crashes)
 400     #if !defined(__VISUALC__)
 401         #define _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
 402     #endif
 403
 404     // Everyone except Visual C++ (cause problems for VC++ - crashes)
 405     #if !defined(__VISUALC__)
 406         #define _WX_WANT_ARRAY_DELETE_VOID
 407     #endif
 408
 409     // Only CodeWarrior 6 or higher
 410     #if defined(__MWERKS__) && (__MWERKS__ >= 0x2400)
 411         #define _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
 412     #endif
 413
 414 #endif // wxUSE_ARRAY_MEMORY_OPERATORS
 415
 416 #endif // WXDEBUG && wxUSE_MEMORY_TRACING
 417
 418 #if wxUSE_STD_IOSTREAM && (defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT)
 419 // needed by wxObject::Dump
 420 #include "wx/iosfwrap.h"
 421 #endif
 422
 423 // ----------------------------------------------------------------------------
 424 // wxObject: the root class of wxWindows object hierarchy
 425 // ----------------------------------------------------------------------------
 426
 427 class WXDLLIMPEXP_BASE wxObject
 428 {
 429     DECLARE_ABSTRACT_CLASS(wxObject)
 430
 431 private:
 432     void InitFrom(const wxObject& other);
 433
 434 public:
 435     wxObject() { m_refData = NULL; }
 436     virtual ~wxObject() { UnRef(); }
 437
 438     wxObject(const wxObject& other)
 439         {
 440             InitFrom(other);
 441         }
 442
 443     wxObject& operator=(const wxObject& other)
 444     {
 445         if ( this != &other )
 446         {
 447             UnRef();
 448             InitFrom(other);
 449         }
 450         return *this;
 451     }
 452
 453     bool IsKindOf(wxClassInfo *info) const;
 454
 455
 456     // Turn on the correct set of new and delete operators
 457
 458 #ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT
 459     void *operator new ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 );
 460 #endif
 461
 462 #ifdef _WX_WANT_DELETE_VOID
 463     void operator delete ( void * buf );
 464 #endif
 465
 466 #ifdef _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET
 467     void operator delete ( void *buf, const char *_fname, size_t _line );
 468 #endif
 469
 470 #ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT
 471     void operator delete ( void *buf, const wxChar*, int );
 472 #endif
 473
 474 #ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
 475     void *operator new[] ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 );
 476 #endif
 477
 478 #ifdef _WX_WANT_ARRAY_DELETE_VOID
 479     void operator delete[] ( void *buf );
 480 #endif
 481
 482 #ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
 483     void operator delete[] (void* buf, const wxChar*, int );
 484 #endif
 485
 486
 487 #if wxUSE_STD_IOSTREAM && (defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT)
 488     virtual void Dump(wxSTD ostream& str);
 489 #endif
 490
 491     // ref counted data handling methods
 492
 493     // get/set
 494     wxObjectRefData *GetRefData() const { return m_refData; }
 495     void SetRefData(wxObjectRefData *data) { m_refData = data; }
 496
 497     // make a 'clone' of the object
 498     void Ref(const wxObject& clone);
 499
 500     // destroy a reference
 501     void UnRef();
 502
 503 protected:
 504     // ensure that our data is not shared with anybody else: if we have no
 505     // data, it is created using CreateRefData() below, if we have shared data
 506     // it is copied using CloneRefData(), otherwise nothing is done
 507     void AllocExclusive();
 508
 509     // both methods must be implemented if Unshare() is used, not pure virtual
 510     // only because of the backwards compatibility reasons
 511
 512     // create a new m_refData
 513     virtual wxObjectRefData *CreateRefData() const;
 514
 515     // create a new m_refData initialized with the given one
 516     virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
 517
 518     wxObjectRefData *m_refData;
 519 };
 520
 521 // ----------------------------------------------------------------------------
 522 // wxObjectRefData: ref counted data meant to be stored in wxObject
 523 // ----------------------------------------------------------------------------
 524
 525 class WXDLLIMPEXP_BASE wxObjectRefData
 526 {
 527     friend class WXDLLIMPEXP_BASE wxObject;
 528
 529 public:
 530     wxObjectRefData() : m_count(1) { }
 531     virtual ~wxObjectRefData() { }
 532
 533     int GetRefCount() const { return m_count; }
 534
 535 private:
 536     int m_count;
 537 };
 538
 539
 540 inline wxObject *wxCheckDynamicCast(wxObject *obj, wxClassInfo *classInfo)
 541 {
 542     return obj && obj->GetClassInfo()->IsKindOf(classInfo) ? obj : NULL;
 543 }
 544
 545 #if wxUSE_EXTENDED_RTTI
 546 class WXDLLIMPEXP_BASE wxDynamicObject : public wxObject
 547 {
 548 public:
 549     // instantiates this object with an instance of its superclass
 550     wxDynamicObject(wxObject* superClassInstance, const wxDynamicClassInfo *info) ;
 551     ~wxDynamicObject();
 552
 553     void SetProperty (const wxChar *PropertyName, const wxxVariant &Value);
 554     wxxVariant GetProperty (const wxChar *PropertyName) const ;
 555
 556     // get the runtime identity of this object
 557     wxClassInfo *GetClassInfo() const
 558     {
 559                 return const_cast<wxClassInfo*>((const wxClassInfo*)m_classInfo);
 560     }
 561
 562     wxObject* GetSuperClassInstance() const
 563     {
 564         return m_superClassInstance ;
 565     }
 566 private :
 567     wxObject *m_superClassInstance ;
 568     const wxDynamicClassInfo *m_classInfo;
 569     struct wxDynamicObjectInternal;
 570     wxDynamicObjectInternal *m_data;
 571 };
 572 #endif
 573
 574 // ----------------------------------------------------------------------------
 575 // more debugging macros
 576 // ----------------------------------------------------------------------------
 577
 578 #ifdef __WXDEBUG__
 579     #ifndef WXDEBUG_NEW
 580         #define WXDEBUG_NEW new(__TFILE__,__LINE__)
 581     #endif
 582 #else // !__WXDEBUG__
 583     #define WXDEBUG_NEW new
 584 #endif
 585
 586 // Redefine new to be the debugging version. This doesn't work with all
 587 // compilers, in which case you need to use WXDEBUG_NEW explicitly if you wish
 588 // to use the debugging version.
 589
 590 #if defined(__WXDEBUG__) && wxUSE_GLOBAL_MEMORY_OPERATORS && wxUSE_DEBUG_NEW_ALWAYS
 591     #define new new(__TFILE__,__LINE__)
 592 #endif
 593
 594 #endif  // _WX_OBJECTH__
 595