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wxWidgets/include/wx/object.h
Václav Slavík cafc76a4bb deprecated Initialize/CleanUpClasses 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22629 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2003-08-06 12:10:30 +00:00

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/////////////////////////////////////////////////////////////////////////////
// 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 <ron@debian.org>
// 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 WXDLLIMPEXP_BASE wxObject;
#if wxUSE_DYNAMIC_CLASSES
#ifndef wxUSE_EXTENDED_RTTI
#define wxUSE_EXTENDED_RTTI 0
#endif
#if wxUSE_EXTENDED_RTTI
#include "wx/xti.h"
#else
// ----------------------------------------------------------------------------
// conditional compilation
// ----------------------------------------------------------------------------
// this shouldn't be needed any longer as <wx/msw/private.h> does it but it
// doesn't hurt neither
#ifdef GetClassName
#undef GetClassName
#endif
#ifdef GetClassInfo
#undef GetClassInfo
#endif
class WXDLLIMPEXP_BASE wxClassInfo;
class WXDLLIMPEXP_BASE wxHashTable;
class WXDLLIMPEXP_BASE wxObjectRefData;
// ----------------------------------------------------------------------------
// wxClassInfo
// ----------------------------------------------------------------------------
typedef wxObject *(*wxObjectConstructorFn)(void);
class WXDLLIMPEXP_BASE wxClassInfo
{
public:
wxClassInfo( const wxChar *className,
const wxClassInfo *baseInfo1,
const wxClassInfo *baseInfo2,
int size,
wxObjectConstructorFn ctor )
: m_className(className)
, m_objectSize(size)
, m_objectConstructor(ctor)
, m_baseInfo1(baseInfo1)
, m_baseInfo2(baseInfo2)
, m_next(sm_first)
{
sm_first = this;
Register();
}
~wxClassInfo();
wxObject *CreateObject() { return m_objectConstructor ? (*m_objectConstructor)() : 0; }
const wxChar *GetClassName() const { return m_className; }
const wxChar *GetBaseClassName1() const { return m_baseInfo1->GetClassName(); }
const wxChar *GetBaseClassName2() const { return m_baseInfo2->GetClassName(); }
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) ) );
}
#ifdef WXWIN_COMPATIBILITY_2_4
// Initializes parent pointers and hash table for fast searching.
wxDEPRECATED( static void InitializeClasses() );
// Cleans up hash table used for fast searching.
wxDEPRECATED( static void CleanUpClasses() );
#endif
static void CleanUp();
public:
const wxChar *m_className;
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)
protected:
// registers the class
void Register();
void Unregister();
};
WXDLLIMPEXP_BASE wxObject *wxCreateDynamicObject(const wxChar *name);
#ifdef WXWIN_COMPATIBILITY_2_4
inline void wxClassInfo::InitializeClasses() {}
inline void wxClassInfo::CleanUpClasses() {}
#endif
// ----------------------------------------------------------------------------
// 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_DYNAMIC_CLASS_NO_ASSIGN(name) \
DECLARE_NO_ASSIGN_CLASS(name) \
DECLARE_DYNAMIC_CLASS(name)
#define DECLARE_DYNAMIC_CLASS_NO_COPY(name) \
DECLARE_NO_COPY_CLASS(name) \
DECLARE_DYNAMIC_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* wxConstructorFor##name() \
{ return new name; } \
wxClassInfo name::sm_class##name(wxT(#name), \
&basename::sm_class##basename, NULL, \
(int) sizeof(name), \
(wxObjectConstructorFn) wxConstructorFor##name);
// Multiple inheritance with two base classes
#define IMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) \
wxObject* wxConstructorFor##name() \
{ return new name; } \
wxClassInfo name::sm_class##name(wxT(#name), \
&basename1::sm_class##basename1, \
&basename2::sm_class##basename2, \
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), \
&basename::sm_class##basename, NULL, \
(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), \
&basename1::sm_class##basename1, \
&basename2::sm_class##basename2, \
(int) sizeof(name), \
(wxObjectConstructorFn) 0);
#define IMPLEMENT_CLASS IMPLEMENT_ABSTRACT_CLASS
#define IMPLEMENT_CLASS2 IMPLEMENT_ABSTRACT_CLASS2
#endif // !wxUSE_EXTENDED_RTTI
// -----------------------------------
// 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<className *>(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 WXDLLIMPEXP_BASE 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 WXDLLIMPEXP_BASE wxObjectRefData
{
friend class WXDLLIMPEXP_BASE 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__
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