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419b20032b432c64c03c0556b660fa40df499c89
wxWidgets/include/wx/object.h
Stefan Csomor f06d69376d rearranging xti code 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66650 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2011-01-08 08:03:42 +00:00

506 lines
20 KiB
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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__
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#include "wx/memory.h"
#define wxDECLARE_CLASS_INFO_ITERATORS() \
class WXDLLIMPEXP_BASE const_iterator \
{ \
typedef wxHashTable_Node Node; \
public: \
typedef const wxClassInfo* value_type; \
typedef const value_type& const_reference; \
typedef const_iterator itor; \
typedef value_type* ptr_type; \
\
Node* m_node; \
wxHashTable* m_table; \
public: \
typedef const_reference reference_type; \
typedef ptr_type pointer_type; \
\
const_iterator(Node* node, wxHashTable* table) \
: m_node(node), m_table(table) { } \
const_iterator() : m_node(NULL), m_table(NULL) { } \
value_type operator*() const; \
itor& operator++(); \
const itor operator++(int); \
bool operator!=(const itor& it) const \
{ return it.m_node != m_node; } \
bool operator==(const itor& it) const \
{ return it.m_node == m_node; } \
}; \
\
static const_iterator begin_classinfo(); \
static const_iterator end_classinfo()
// based on the value of wxUSE_EXTENDED_RTTI symbol,
// only one of the RTTI system will be compiled:
// - the "old" one (defined by rtti.h) or
// - the "new" one (defined by xti.h)
#include "wx/xti.h"
#include "wx/rtti.h"
#define wxIMPLEMENT_CLASS(name, basename) \
wxIMPLEMENT_ABSTRACT_CLASS(name, basename)
#define wxIMPLEMENT_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2)
// -----------------------------------
// 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 wxDECLARE_PLUGGABLE_CLASS(name) \
wxDECLARE_DYNAMIC_CLASS(name); _DECLARE_DL_SENTINEL(name, WXDLLIMPEXP_CORE)
#define wxDECLARE_ABSTRACT_PLUGGABLE_CLASS(name) \
wxDECLARE_ABSTRACT_CLASS(name); _DECLARE_DL_SENTINEL(name, WXDLLIMPEXP_CORE)
#define wxDECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) \
wxDECLARE_DYNAMIC_CLASS(name); _DECLARE_DL_SENTINEL(name, usergoo)
#define wxDECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo) \
wxDECLARE_ABSTRACT_CLASS(name); _DECLARE_DL_SENTINEL(name, usergoo)
#define wxIMPLEMENT_PLUGGABLE_CLASS(name, basename) \
wxIMPLEMENT_DYNAMIC_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
#define wxIMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
#define wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
wxIMPLEMENT_ABSTRACT_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
#define wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
#define wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) \
wxIMPLEMENT_PLUGGABLE_CLASS(name, basename)
#define wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2)
#define wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename)
#define wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)
#define wxCLASSINFO(name) (&name::ms_classInfo)
#define wxIS_KIND_OF(obj, className) obj->IsKindOf(&className::ms_classInfo)
// Just seems a bit nicer-looking (pretend it's not a macro)
#define wxIsKindOf(obj, className) obj->IsKindOf(&className::ms_classInfo)
// this cast does some more checks at compile time as it uses static_cast
// internally
//
// note that it still has different semantics from dynamic_cast<> and so can't
// be replaced by it as long as there are any compilers not supporting it
#define wxDynamicCast(obj, className) \
((className *) wxCheckDynamicCast( \
const_cast<wxObject *>(static_cast<const wxObject *>(\
const_cast<className *>(static_cast<const className *>(obj)))), \
&className::ms_classInfo))
// The 'this' pointer is always true, so use this version
// to cast the this pointer and avoid compiler warnings.
#define wxDynamicCastThis(className) \
(IsKindOf(&className::ms_classInfo) ? (className *)(this) : (className *)0)
// FIXME-VC6: dummy argument needed because VC6 doesn't support explicitly
// choosing the template function to call
template <class T>
inline T *wxCheckCast(const void *ptr, T * = NULL)
{
wxASSERT_MSG( wxDynamicCast(ptr, T), "wxStaticCast() used incorrectly" );
return const_cast<T *>(static_cast<const T *>(ptr));
}
#define wxStaticCast(obj, className) wxCheckCast((obj), (className *)NULL)
// ----------------------------------------------------------------------------
// 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 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 and CodeWarrior 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 // wxUSE_MEMORY_TRACING
// ----------------------------------------------------------------------------
// Compatibility macro aliases DECLARE group
// ----------------------------------------------------------------------------
// deprecated variants _not_ requiring a semicolon after them and without wx prefix.
// (note that also some wx-prefixed macro do _not_ require a semicolon because
// it's not always possible to force the compire to require it)
#define DECLARE_CLASS_INFO_ITERATORS() wxDECLARE_CLASS_INFO_ITERATORS();
#define DECLARE_ABSTRACT_CLASS(n) wxDECLARE_ABSTRACT_CLASS(n);
#define DECLARE_DYNAMIC_CLASS_NO_ASSIGN(n) wxDECLARE_DYNAMIC_CLASS_NO_ASSIGN(n);
#define DECLARE_DYNAMIC_CLASS_NO_COPY(n) wxDECLARE_DYNAMIC_CLASS_NO_COPY(n);
#define DECLARE_DYNAMIC_CLASS(n) wxDECLARE_DYNAMIC_CLASS(n);
#define DECLARE_CLASS(n) wxDECLARE_CLASS(n);
#define DECLARE_PLUGGABLE_CLASS(n) wxDECLARE_PLUGGABLE_CLASS(n);
#define DECLARE_ABSTRACT_PLUGGABLE_CLASS(n) wxDECLARE_ABSTRACT_PLUGGABLE_CLASS(n);
#define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(n,u) wxDECLARE_USER_EXPORTED_PLUGGABLE_CLASS(n,u);
#define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,u) wxDECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,u);
// ----------------------------------------------------------------------------
// wxRefCounter: ref counted data "manager"
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxRefCounter
{
public:
wxRefCounter() { m_count = 1; }
int GetRefCount() const { return m_count; }
void IncRef() { m_count++; }
void DecRef();
protected:
// this object should never be destroyed directly but only as a
// result of a DecRef() call:
virtual ~wxRefCounter() { }
private:
// our refcount:
int m_count;
// It doesn't make sense to copy the reference counted objects, a new ref
// counter should be created for a new object instead and compilation
// errors in the code using wxRefCounter due to the lack of copy ctor often
// indicate a problem, e.g. a forgotten copy ctor implementation somewhere.
wxDECLARE_NO_COPY_CLASS(wxRefCounter);
};
// ----------------------------------------------------------------------------
// wxObjectRefData: ref counted data meant to be stored in wxObject
// ----------------------------------------------------------------------------
typedef wxRefCounter wxObjectRefData;
// ----------------------------------------------------------------------------
// wxObjectDataPtr: helper class to avoid memleaks because of missing calls
// to wxObjectRefData::DecRef
// ----------------------------------------------------------------------------
template <class T>
class wxObjectDataPtr
{
public:
typedef T element_type;
wxEXPLICIT wxObjectDataPtr(T *ptr = NULL) : m_ptr(ptr) {}
// copy ctor
wxObjectDataPtr(const wxObjectDataPtr<T> &tocopy)
: m_ptr(tocopy.m_ptr)
{
if (m_ptr)
m_ptr->IncRef();
}
~wxObjectDataPtr()
{
if (m_ptr)
m_ptr->DecRef();
}
T *get() const { return m_ptr; }
// test for pointer validity: defining conversion to unspecified_bool_type
// and not more obvious bool to avoid implicit conversions to integer types
typedef T *(wxObjectDataPtr<T>::*unspecified_bool_type)() const;
operator unspecified_bool_type() const
{
return m_ptr ? &wxObjectDataPtr<T>::get : NULL;
}
T& operator*() const
{
wxASSERT(m_ptr != NULL);
return *(m_ptr);
}
T *operator->() const
{
wxASSERT(m_ptr != NULL);
return get();
}
void reset(T *ptr)
{
if (m_ptr)
m_ptr->DecRef();
m_ptr = ptr;
}
wxObjectDataPtr& operator=(const wxObjectDataPtr &tocopy)
{
if (m_ptr)
m_ptr->DecRef();
m_ptr = tocopy.m_ptr;
if (m_ptr)
m_ptr->IncRef();
return *this;
}
wxObjectDataPtr& operator=(T *ptr)
{
if (m_ptr)
m_ptr->DecRef();
m_ptr = ptr;
return *this;
}
private:
T *m_ptr;
};
// ----------------------------------------------------------------------------
// wxObject: the root class of wxWidgets object hierarchy
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxObject
{
wxDECLARE_ABSTRACT_CLASS(wxObject);
public:
wxObject() { m_refData = NULL; }
virtual ~wxObject() { UnRef(); }
wxObject(const wxObject& other)
{
m_refData = other.m_refData;
if (m_refData)
m_refData->IncRef();
}
wxObject& operator=(const wxObject& other)
{
if ( this != &other )
{
Ref(other);
}
return *this;
}
bool IsKindOf(const 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
// 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();
// Make sure this object has only one reference
void UnShare() { AllocExclusive(); }
// check if this object references the same data as the other one
bool IsSameAs(const wxObject& o) const { return m_refData == o.m_refData; }
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 AllocExclusive() 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;
};
inline wxObject *wxCheckDynamicCast(wxObject *obj, wxClassInfo *classInfo)
{
return obj && obj->GetClassInfo()->IsKindOf(classInfo) ? obj : NULL;
}
#include "wx/xti2.h"
// ----------------------------------------------------------------------------
// more debugging macros
// ----------------------------------------------------------------------------
#if wxUSE_DEBUG_NEW_ALWAYS
#define WXDEBUG_NEW new(__TFILE__,__LINE__)
#if wxUSE_GLOBAL_MEMORY_OPERATORS
#define new WXDEBUG_NEW
#elif defined(__VISUALC__)
// Including this file redefines new and allows leak reports to
// contain line numbers
#include "wx/msw/msvcrt.h"
#endif
#endif // wxUSE_DEBUG_NEW_ALWAYS
// ----------------------------------------------------------------------------
// Compatibility macro aliases IMPLEMENT group
// ----------------------------------------------------------------------------
// deprecated variants _not_ requiring a semicolon after them and without wx prefix.
// (note that also some wx-prefixed macro do _not_ require a semicolon because
// it's not always possible to force the compire to require it)
#define IMPLEMENT_DYNAMIC_CLASS(n,b) wxIMPLEMENT_DYNAMIC_CLASS(n,b)
#define IMPLEMENT_DYNAMIC_CLASS2(n,b1,b2) wxIMPLEMENT_DYNAMIC_CLASS2(n,b1,b2)
#define IMPLEMENT_ABSTRACT_CLASS(n,b) wxIMPLEMENT_ABSTRACT_CLASS(n,b)
#define IMPLEMENT_ABSTRACT_CLASS2(n,b1,b2) wxIMPLEMENT_ABSTRACT_CLASS2(n,b1,b2)
#define IMPLEMENT_CLASS(n,b) wxIMPLEMENT_CLASS(n,b)
#define IMPLEMENT_CLASS2(n,b1,b2) wxIMPLEMENT_CLASS2(n,b1,b2)
#define IMPLEMENT_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_PLUGGABLE_CLASS(n,b)
#define IMPLEMENT_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_PLUGGABLE_CLASS2(n,b,b2)
#define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(n,b)
#define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2)
#define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(n,b)
#define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(n,b,b2)
#define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,b)
#define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2)
#define CLASSINFO(n) wxCLASSINFO(n)
#endif // _WX_OBJECTH__
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