///////////////////////////////////////////////////////////////////////////// // Name: wx/object.h // Purpose: wxObject class, plus run-time type information macros // Author: Julian Smart // Modified by: Ron Lee // Created: 01/02/97 // RCS-ID: $Id$ // Copyright: (c) 1997 Julian Smart // (c) 2001 Ron Lee // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifndef _WX_OBJECTH__ #define _WX_OBJECTH__ #if defined(__GNUG__) && !defined(__APPLE__) #pragma interface "object.h" #endif // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- #include "wx/defs.h" #include "wx/memory.h" class WXDLLEXPORT wxObject; #if wxUSE_DYNAMIC_CLASSES // ---------------------------------------------------------------------------- // conditional compilation // ---------------------------------------------------------------------------- // this shouldn't be needed any longer as does it but it // doesn't hurt neither #ifdef GetClassName #undef GetClassName #endif #ifdef GetClassInfo #undef GetClassInfo #endif class WXDLLEXPORT wxClassInfo; class WXDLLEXPORT wxHashTable; class WXDLLEXPORT wxObjectRefData; // ---------------------------------------------------------------------------- // wxClassInfo // ---------------------------------------------------------------------------- typedef wxObject *(*wxObjectConstructorFn)(void); class WXDLLEXPORT wxClassInfo { public: wxClassInfo( const wxChar *className, const wxChar *baseName1, const wxChar *baseName2, int size, wxObjectConstructorFn ctor ) : m_className(className) , m_baseClassName1(baseName1) , m_baseClassName2(baseName2) , m_objectSize(size) , m_objectConstructor(ctor) , m_baseInfo1(0) , m_baseInfo2(0) , m_next(sm_first) { sm_first = this; } ~wxClassInfo(); wxObject *CreateObject() { return m_objectConstructor ? (*m_objectConstructor)() : 0; } const wxChar *GetClassName() const { return m_className; } const wxChar *GetBaseClassName1() const { return m_baseClassName1; } const wxChar *GetBaseClassName2() const { return m_baseClassName2; } const wxClassInfo *GetBaseClass1() const { return m_baseInfo1; } const wxClassInfo *GetBaseClass2() const { return m_baseInfo2; } int GetSize() const { return m_objectSize; } wxObjectConstructorFn GetConstructor() const { return m_objectConstructor; } static const wxClassInfo *GetFirst() { return sm_first; } const wxClassInfo *GetNext() const { return m_next; } static wxClassInfo *FindClass(const wxChar *className); // Climb upwards through inheritance hierarchy. // Dual inheritance is catered for. bool IsKindOf(const wxClassInfo *info) const { return info != 0 && ( info == this || ( m_baseInfo1 && m_baseInfo1->IsKindOf(info) ) || ( m_baseInfo2 && m_baseInfo2->IsKindOf(info) ) ); } // Initializes parent pointers and hash table for fast searching. static void InitializeClasses(); // Cleans up hash table used for fast searching. static void CleanUpClasses(); public: const wxChar *m_className; const wxChar *m_baseClassName1; const wxChar *m_baseClassName2; int m_objectSize; wxObjectConstructorFn m_objectConstructor; // Pointers to base wxClassInfos: set in InitializeClasses const wxClassInfo *m_baseInfo1; const wxClassInfo *m_baseInfo2; // class info object live in a linked list: // pointers to its head and the next element in it static wxClassInfo *sm_first; wxClassInfo *m_next; // FIXME: this should be private (currently used directly by way too // many clients) static wxHashTable *sm_classTable; private: // InitializeClasses() helper static wxClassInfo *GetBaseByName(const wxChar *name); DECLARE_NO_COPY_CLASS(wxClassInfo) }; WXDLLEXPORT wxObject *wxCreateDynamicObject(const wxChar *name); // ---------------------------------------------------------------------------- // Dynamic class macros // ---------------------------------------------------------------------------- #define DECLARE_DYNAMIC_CLASS(name) \ public: \ static wxClassInfo sm_class##name; \ virtual wxClassInfo *GetClassInfo() const \ { return &name::sm_class##name; } #define DECLARE_ABSTRACT_CLASS(name) DECLARE_DYNAMIC_CLASS(name) #define DECLARE_CLASS(name) DECLARE_DYNAMIC_CLASS(name) // ----------------------------------- // for concrete classes // ----------------------------------- // Single inheritance with one base class #define IMPLEMENT_DYNAMIC_CLASS(name, basename) \ wxObject* WXDLLEXPORT_CTORFN wxConstructorFor##name() \ { return new name; } \ wxClassInfo name::sm_class##name(wxT(#name), wxT(#basename), \ 0, (int) sizeof(name), \ (wxObjectConstructorFn) wxConstructorFor##name); // Multiple inheritance with two base classes #define IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) \ wxObject* WXDLLEXPORT_CTORFN wxConstructorFor##name() \ { return new name; } \ wxClassInfo name::sm_class##name(wxT(#name), wxT(#basename1), \ wxT(#basename2), (int) sizeof(name), \ (wxObjectConstructorFn) wxConstructorFor##name); // ----------------------------------- // for abstract classes // ----------------------------------- // Single inheritance with one base class #define IMPLEMENT_ABSTRACT_CLASS(name, basename) \ wxClassInfo name::sm_class##name(wxT(#name), wxT(#basename), \ 0, (int) sizeof(name), (wxObjectConstructorFn) 0); // Multiple inheritance with two base classes #define IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) \ wxClassInfo name::sm_class##name(wxT(#name), wxT(#basename1), \ wxT(#basename2), (int) sizeof(name), \ (wxObjectConstructorFn) 0); #define IMPLEMENT_CLASS IMPLEMENT_ABSTRACT_CLASS #define IMPLEMENT_CLASS2 IMPLEMENT_ABSTRACT_CLASS2 // ----------------------------------- // for pluggable classes // ----------------------------------- // NOTE: this should probably be the very first statement // in the class declaration so wxPluginSentinel is // the first member initialised and the last destroyed. // _DECLARE_DL_SENTINEL(name) wxPluginSentinel m_pluginsentinel; #if wxUSE_NESTED_CLASSES #define _DECLARE_DL_SENTINEL(name, exportdecl) \ class exportdecl name##PluginSentinel { \ private: \ static const wxString sm_className; \ public: \ name##PluginSentinel(); \ ~name##PluginSentinel(); \ }; \ name##PluginSentinel m_pluginsentinel; #define _IMPLEMENT_DL_SENTINEL(name) \ const wxString name::name##PluginSentinel::sm_className(#name); \ name::name##PluginSentinel::name##PluginSentinel() { \ wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \ if( e != 0 ) { e->RefObj(); } \ } \ name::name##PluginSentinel::~name##PluginSentinel() { \ wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \ if( e != 0 ) { e->UnrefObj(); } \ } #else #define _DECLARE_DL_SENTINEL(name) #define _IMPLEMENT_DL_SENTINEL(name) #endif // wxUSE_NESTED_CLASSES #define DECLARE_PLUGGABLE_CLASS(name) \ DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT) #define DECLARE_ABSTRACT_PLUGGABLE_CLASS(name) \ DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, WXDLLEXPORT) #define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) \ DECLARE_DYNAMIC_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo) #define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo) \ DECLARE_ABSTRACT_CLASS(name) _DECLARE_DL_SENTINEL(name, usergoo) #define IMPLEMENT_PLUGGABLE_CLASS(name, basename) \ IMPLEMENT_DYNAMIC_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name) #define IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) \ IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name) #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) \ IMPLEMENT_ABSTRACT_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name) #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \ IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name) #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) \ IMPLEMENT_PLUGGABLE_CLASS(name, basename) #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2) \ IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) \ IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \ IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) #define CLASSINFO(name) (&name::sm_class##name) #else // !wxUSE_DYNAMIC_CLASSES // No dynamic class system: so stub out the macros #define DECLARE_DYNAMIC_CLASS(name) #define DECLARE_ABSTRACT_CLASS(name) #define DECLARE_CLASS(name) #define IMPLEMENT_DYNAMIC_CLASS(name, basename) #define IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) #define IMPLEMENT_ABSTRACT_CLASS(name, basename) #define IMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) #define IMPLEMENT_CLASS IMPLEMENT_ABSTRACT_CLASS #define IMPLEMENT_CLASS2 IMPLEMENT_ABSTRACT_CLASS2 #define DECLARE_PLUGGABLE_CLASS(name) #define DECLARE_ABSTRACT_PLUGGABLE_CLASS(name) #define IMPLEMENT_PLUGGABLE_CLASS(name, basename) #define IMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) #define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) #define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) #define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo) #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) #define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2) #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) #define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) #endif // wxUSE_DYNAMIC_CLASSES #define wxIS_KIND_OF(obj, className) obj->IsKindOf(&className::sm_class##className) // Just seems a bit nicer-looking (pretend it's not a macro) #define wxIsKindOf(obj, className) obj->IsKindOf(&className::sm_class##className) // to be replaced by dynamic_cast<> in the future #define wxDynamicCast(obj, className) \ ((className *) wxCheckDynamicCast((wxObject*)(obj), &className::sm_class##className)) // The 'this' pointer is always true, so use this version // to cast the this pointer and avoid compiler warnings. #define wxDynamicCastThis(className) \ (IsKindOf(&className::sm_class##className) ? (className *)(this) : (className *)0) #ifdef HAVE_CONST_CAST #define wxConstCast(obj, className) const_cast(obj) #else #define wxConstCast(obj, className) ((className *)(obj)) #endif #ifdef __WXDEBUG__ inline void wxCheckCast(void *ptr) { wxASSERT_MSG( ptr, _T("wxStaticCast() used incorrectly") ); } #define wxStaticCast(obj, className) \ (wxCheckCast(wxDynamicCast(obj, className)), ((className *)(obj))) #else // !__WXDEBUG__ #define wxStaticCast(obj, className) ((className *)(obj)) #endif // __WXDEBUG__ // ---------------------------------------------------------------------------- // set up memory debugging macros // ---------------------------------------------------------------------------- /* Which new/delete operator variants do we want? _WX_WANT_NEW_SIZET_WXCHAR_INT = void *operator new (size_t size, wxChar *fileName = 0, int lineNum = 0) _WX_WANT_DELETE_VOID = void operator delete (void * buf) _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET = void operator delete (void *buf, const char *_fname, size_t _line) _WX_WANT_DELETE_VOID_WXCHAR_INT = void operator delete(void *buf, wxChar*, int) _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT = void *operator new[] (size_t size, wxChar *fileName , int lineNum = 0) _WX_WANT_ARRAY_DELETE_VOID = void operator delete[] (void *buf) _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT = void operator delete[] (void* buf, wxChar*, int ) */ #if defined(__WXDEBUG__) && wxUSE_MEMORY_TRACING // All compilers get this one #define _WX_WANT_NEW_SIZET_WXCHAR_INT // Everyone except Visage gets the next one #ifndef __VISAGECPP__ #define _WX_WANT_DELETE_VOID #endif // Only visage gets this one under the correct circumstances #if defined(__VISAGECPP__) && __DEBUG_ALLOC__ #define _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET #endif // Only VC++ 6.0 and CodeWarrior compilers get overloaded delete that matches new #if ( defined(__VISUALC__) && (__VISUALC__ >= 1200) ) || (defined(__MWERKS__) && (__MWERKS__ >= 0x2400)) #define _WX_WANT_DELETE_VOID_WXCHAR_INT #endif // Now see who (if anyone) gets the array memory operators #if wxUSE_ARRAY_MEMORY_OPERATORS // Everyone except Visual C++ (cause problems for VC++ - crashes) #if !defined(__VISUALC__) #define _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT #endif // Everyone except Visual C++ (cause problems for VC++ - crashes) #if !defined(__VISUALC__) #define _WX_WANT_ARRAY_DELETE_VOID #endif // Only CodeWarrior 6 or higher #if defined(__MWERKS__) && (__MWERKS__ >= 0x2400) #define _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT #endif #endif // wxUSE_ARRAY_MEMORY_OPERATORS #endif // WXDEBUG && wxUSE_MEMORY_TRACING #if wxUSE_STD_IOSTREAM && (defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT) // needed by wxObject::Dump #include "wx/iosfwrap.h" #endif // ---------------------------------------------------------------------------- // wxObject: the root class of wxWindows object hierarchy // ---------------------------------------------------------------------------- class WXDLLEXPORT wxObject { DECLARE_ABSTRACT_CLASS(wxObject) private: void InitFrom(const wxObject& other); public: wxObject() { m_refData = NULL; } virtual ~wxObject() { UnRef(); } wxObject(const wxObject& other) { InitFrom(other); } wxObject& operator=(const wxObject& other) { if ( this != &other ) { UnRef(); InitFrom(other); } return *this; } bool IsKindOf(wxClassInfo *info) const; // Turn on the correct set of new and delete operators #ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT void *operator new ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 ); #endif #ifdef _WX_WANT_DELETE_VOID void operator delete ( void * buf ); #endif #ifdef _WX_WANT_DELETE_VOID_CONSTCHAR_SIZET void operator delete ( void *buf, const char *_fname, size_t _line ); #endif #ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT void operator delete ( void *buf, const wxChar*, int ); #endif #ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT void *operator new[] ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 ); #endif #ifdef _WX_WANT_ARRAY_DELETE_VOID void operator delete[] ( void *buf ); #endif #ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT void operator delete[] (void* buf, const wxChar*, int ); #endif #if wxUSE_STD_IOSTREAM && (defined(__WXDEBUG__) || wxUSE_DEBUG_CONTEXT) virtual void Dump(wxSTD ostream& str); #endif // ref counted data handling methods // get/set wxObjectRefData *GetRefData() const { return m_refData; } void SetRefData(wxObjectRefData *data) { m_refData = data; } // make a 'clone' of the object void Ref(const wxObject& clone); // destroy a reference void UnRef(); protected: // ensure that our data is not shared with anybody else: if we have no // data, it is created using CreateRefData() below, if we have shared data // it is copied using CloneRefData(), otherwise nothing is done void AllocExclusive(); // both methods must be implemented if Unshare() is used, not pure virtual // only because of the backwards compatibility reasons // create a new m_refData virtual wxObjectRefData *CreateRefData() const; // create a new m_refData initialized with the given one virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const; wxObjectRefData *m_refData; }; // ---------------------------------------------------------------------------- // wxObjectRefData: ref counted data meant to be stored in wxObject // ---------------------------------------------------------------------------- class WXDLLEXPORT wxObjectRefData { friend class WXDLLEXPORT wxObject; public: wxObjectRefData() : m_count(1) { } virtual ~wxObjectRefData() { } int GetRefCount() const { return m_count; } private: int m_count; }; inline wxObject *wxCheckDynamicCast(wxObject *obj, wxClassInfo *classInfo) { return obj && obj->GetClassInfo()->IsKindOf(classInfo) ? obj : NULL; } // ---------------------------------------------------------------------------- // more debugging macros // ---------------------------------------------------------------------------- #ifdef __WXDEBUG__ #ifndef WXDEBUG_NEW #define WXDEBUG_NEW new(__TFILE__,__LINE__) #endif #else // !__WXDEBUG__ #define WXDEBUG_NEW new #endif // Redefine new to be the debugging version. This doesn't work with all // compilers, in which case you need to use WXDEBUG_NEW explicitly if you wish // to use the debugging version. #if defined(__WXDEBUG__) && wxUSE_GLOBAL_MEMORY_OPERATORS && wxUSE_DEBUG_NEW_ALWAYS #define new new(__TFILE__,__LINE__) #endif #endif // _WX_OBJECTH__