0585c96a3b
This undoes accidental change of ms_classInfo from public to protected
in 95c98a0b5f (Work around -Wuggest-override for event table macros from
gcc 11, 2021-04-25).
Also add a unit test checking that using wxCLASSINFO(wxObject) compiles
and works as expected.
512 lines
20 KiB
C++
512 lines
20 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/object.h
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// Purpose: wxObject class, plus run-time type information macros
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// Author: Julian Smart
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// Modified by: Ron Lee
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// Created: 01/02/97
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// Copyright: (c) 1997 Julian Smart
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// (c) 2001 Ron Lee <ron@debian.org>
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_OBJECTH__
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#define _WX_OBJECTH__
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "wx/memory.h"
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#define wxDECLARE_CLASS_INFO_ITERATORS() \
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class WXDLLIMPEXP_BASE const_iterator \
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{ \
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typedef wxHashTable_Node Node; \
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public: \
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typedef const wxClassInfo* value_type; \
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typedef const value_type& const_reference; \
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typedef const_iterator itor; \
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typedef value_type* ptr_type; \
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\
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Node* m_node; \
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wxHashTable* m_table; \
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public: \
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typedef const_reference reference_type; \
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typedef ptr_type pointer_type; \
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\
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const_iterator(Node* node, wxHashTable* table) \
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: m_node(node), m_table(table) { } \
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const_iterator() : m_node(NULL), m_table(NULL) { } \
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value_type operator*() const; \
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itor& operator++(); \
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const itor operator++(int); \
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bool operator!=(const itor& it) const \
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{ return it.m_node != m_node; } \
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bool operator==(const itor& it) const \
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{ return it.m_node == m_node; } \
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}; \
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\
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static const_iterator begin_classinfo(); \
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static const_iterator end_classinfo()
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// based on the value of wxUSE_EXTENDED_RTTI symbol,
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// only one of the RTTI system will be compiled:
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// - the "old" one (defined by rtti.h) or
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// - the "new" one (defined by xti.h)
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#include "wx/xti.h"
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#include "wx/rtti.h"
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#define wxIMPLEMENT_CLASS(name, basename) \
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wxIMPLEMENT_ABSTRACT_CLASS(name, basename)
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#define wxIMPLEMENT_CLASS2(name, basename1, basename2) \
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wxIMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2)
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// -----------------------------------
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// for pluggable classes
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// -----------------------------------
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// NOTE: this should probably be the very first statement
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// in the class declaration so wxPluginSentinel is
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// the first member initialised and the last destroyed.
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// _DECLARE_DL_SENTINEL(name) wxPluginSentinel m_pluginsentinel;
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#if wxUSE_NESTED_CLASSES
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#define _DECLARE_DL_SENTINEL(name, exportdecl) \
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class exportdecl name##PluginSentinel { \
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private: \
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static const wxString sm_className; \
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public: \
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name##PluginSentinel(); \
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~name##PluginSentinel(); \
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}; \
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name##PluginSentinel m_pluginsentinel
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#define _IMPLEMENT_DL_SENTINEL(name) \
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const wxString name::name##PluginSentinel::sm_className(#name); \
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name::name##PluginSentinel::name##PluginSentinel() { \
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wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
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if( e != 0 ) { e->RefObj(); } \
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} \
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name::name##PluginSentinel::~name##PluginSentinel() { \
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wxPluginLibrary *e = (wxPluginLibrary*) wxPluginLibrary::ms_classes.Get(#name); \
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if( e != 0 ) { e->UnrefObj(); } \
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}
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#else
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#define _DECLARE_DL_SENTINEL(name)
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#define _IMPLEMENT_DL_SENTINEL(name)
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#endif // wxUSE_NESTED_CLASSES
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#define wxDECLARE_PLUGGABLE_CLASS(name) \
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wxDECLARE_DYNAMIC_CLASS(name); _DECLARE_DL_SENTINEL(name, WXDLLIMPEXP_CORE)
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#define wxDECLARE_ABSTRACT_PLUGGABLE_CLASS(name) \
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wxDECLARE_ABSTRACT_CLASS(name); _DECLARE_DL_SENTINEL(name, WXDLLIMPEXP_CORE)
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#define wxDECLARE_USER_EXPORTED_PLUGGABLE_CLASS(name, usergoo) \
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wxDECLARE_DYNAMIC_CLASS(name); _DECLARE_DL_SENTINEL(name, usergoo)
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#define wxDECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, usergoo) \
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wxDECLARE_ABSTRACT_CLASS(name); _DECLARE_DL_SENTINEL(name, usergoo)
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#define wxIMPLEMENT_PLUGGABLE_CLASS(name, basename) \
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wxIMPLEMENT_DYNAMIC_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
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#define wxIMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2) \
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wxIMPLEMENT_DYNAMIC_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
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#define wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
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wxIMPLEMENT_ABSTRACT_CLASS(name, basename) _IMPLEMENT_DL_SENTINEL(name)
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#define wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
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wxIMPLEMENT_ABSTRACT_CLASS2(name, basename1, basename2) _IMPLEMENT_DL_SENTINEL(name)
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#define wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(name, basename) \
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wxIMPLEMENT_PLUGGABLE_CLASS(name, basename)
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#define wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(name, basename1, basename2) \
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wxIMPLEMENT_PLUGGABLE_CLASS2(name, basename1, basename2)
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#define wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(name, basename) \
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wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(name, basename)
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#define wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2) \
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wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(name, basename1, basename2)
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#define wxCLASSINFO(name) (&name::ms_classInfo)
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#define wxIS_KIND_OF(obj, className) obj->IsKindOf(&className::ms_classInfo)
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// Just seems a bit nicer-looking (pretend it's not a macro)
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#define wxIsKindOf(obj, className) obj->IsKindOf(&className::ms_classInfo)
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// this cast does some more checks at compile time as it uses static_cast
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// internally
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//
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// note that it still has different semantics from dynamic_cast<> and so can't
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// be replaced by it as long as there are any compilers not supporting it
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#define wxDynamicCast(obj, className) \
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((className *) wxCheckDynamicCast( \
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const_cast<wxObject *>(static_cast<const wxObject *>(\
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const_cast<className *>(static_cast<const className *>(obj)))), \
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&className::ms_classInfo))
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// The 'this' pointer is always true, so use this version
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// to cast the this pointer and avoid compiler warnings.
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#define wxDynamicCastThis(className) \
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(IsKindOf(&className::ms_classInfo) ? (className*)this : NULL)
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template <class T>
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inline T *wxCheckCast(const void *ptr)
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{
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wxASSERT_MSG( wxDynamicCast(ptr, T), "wxStaticCast() used incorrectly" );
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return const_cast<T *>(static_cast<const T *>(ptr));
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}
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#define wxStaticCast(obj, className) wxCheckCast<className>(obj)
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// ----------------------------------------------------------------------------
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// set up memory debugging macros
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// ----------------------------------------------------------------------------
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/*
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Which new/delete operator variants do we want?
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_WX_WANT_NEW_SIZET_WXCHAR_INT = void *operator new (size_t size, wxChar *fileName = 0, int lineNum = 0)
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_WX_WANT_DELETE_VOID = void operator delete (void * buf)
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_WX_WANT_DELETE_VOID_WXCHAR_INT = void operator delete(void *buf, wxChar*, int)
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_WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT = void *operator new[] (size_t size, wxChar *fileName , int lineNum = 0)
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_WX_WANT_ARRAY_DELETE_VOID = void operator delete[] (void *buf)
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_WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT = void operator delete[] (void* buf, wxChar*, int )
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*/
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#if wxUSE_MEMORY_TRACING
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// All compilers get these ones
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#define _WX_WANT_NEW_SIZET_WXCHAR_INT
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#define _WX_WANT_DELETE_VOID
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#if defined(__VISUALC__)
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#define _WX_WANT_DELETE_VOID_WXCHAR_INT
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#endif
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// Now see who (if anyone) gets the array memory operators
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#if wxUSE_ARRAY_MEMORY_OPERATORS
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// Everyone except Visual C++ (cause problems for VC++ - crashes)
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#if !defined(__VISUALC__)
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#define _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
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#endif
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// Everyone except Visual C++ (cause problems for VC++ - crashes)
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#if !defined(__VISUALC__)
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#define _WX_WANT_ARRAY_DELETE_VOID
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#endif
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#endif // wxUSE_ARRAY_MEMORY_OPERATORS
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#endif // wxUSE_MEMORY_TRACING
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// ----------------------------------------------------------------------------
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// Compatibility macro aliases DECLARE group
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// ----------------------------------------------------------------------------
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// deprecated variants _not_ requiring a semicolon after them and without wx prefix.
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// (note that also some wx-prefixed macro do _not_ require a semicolon because
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// it's not always possible to force the compiler to require it)
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#define DECLARE_CLASS_INFO_ITERATORS() wxDECLARE_CLASS_INFO_ITERATORS();
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#define DECLARE_ABSTRACT_CLASS(n) wxDECLARE_ABSTRACT_CLASS(n);
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#define DECLARE_DYNAMIC_CLASS_NO_ASSIGN(n) wxDECLARE_DYNAMIC_CLASS_NO_ASSIGN(n);
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#define DECLARE_DYNAMIC_CLASS_NO_COPY(n) wxDECLARE_DYNAMIC_CLASS_NO_COPY(n);
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#define DECLARE_DYNAMIC_CLASS(n) wxDECLARE_DYNAMIC_CLASS(n);
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#define DECLARE_CLASS(n) wxDECLARE_CLASS(n);
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#define DECLARE_PLUGGABLE_CLASS(n) wxDECLARE_PLUGGABLE_CLASS(n);
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#define DECLARE_ABSTRACT_PLUGGABLE_CLASS(n) wxDECLARE_ABSTRACT_PLUGGABLE_CLASS(n);
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#define DECLARE_USER_EXPORTED_PLUGGABLE_CLASS(n,u) wxDECLARE_USER_EXPORTED_PLUGGABLE_CLASS(n,u);
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#define DECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,u) wxDECLARE_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,u);
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// ----------------------------------------------------------------------------
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// wxRefCounter: ref counted data "manager"
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxRefCounter
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{
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public:
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wxRefCounter() { m_count = 1; }
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int GetRefCount() const { return m_count; }
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void IncRef() { m_count++; }
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void DecRef();
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protected:
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// this object should never be destroyed directly but only as a
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// result of a DecRef() call:
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virtual ~wxRefCounter() { }
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private:
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// our refcount:
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int m_count;
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// It doesn't make sense to copy the reference counted objects, a new ref
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// counter should be created for a new object instead and compilation
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// errors in the code using wxRefCounter due to the lack of copy ctor often
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// indicate a problem, e.g. a forgotten copy ctor implementation somewhere.
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wxDECLARE_NO_COPY_CLASS(wxRefCounter);
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};
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// ----------------------------------------------------------------------------
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// wxObjectRefData: ref counted data meant to be stored in wxObject
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// ----------------------------------------------------------------------------
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typedef wxRefCounter wxObjectRefData;
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// ----------------------------------------------------------------------------
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// wxObjectDataPtr: helper class to avoid memleaks because of missing calls
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// to wxObjectRefData::DecRef
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// ----------------------------------------------------------------------------
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template <class T>
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class wxObjectDataPtr
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{
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public:
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typedef T element_type;
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explicit wxObjectDataPtr(T *ptr = NULL) : m_ptr(ptr) {}
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// copy ctor
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wxObjectDataPtr(const wxObjectDataPtr<T> &tocopy)
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: m_ptr(tocopy.m_ptr)
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{
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if (m_ptr)
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m_ptr->IncRef();
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}
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// generalized copy ctor: U must be convertible to T
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template <typename U>
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wxObjectDataPtr(const wxObjectDataPtr<U> &tocopy)
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: m_ptr(tocopy.get())
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{
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if (m_ptr)
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m_ptr->IncRef();
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}
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~wxObjectDataPtr()
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{
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if (m_ptr)
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m_ptr->DecRef();
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}
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T *get() const { return m_ptr; }
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// test for pointer validity: defining conversion to unspecified_bool_type
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// and not more obvious bool to avoid implicit conversions to integer types
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typedef T *(wxObjectDataPtr<T>::*unspecified_bool_type)() const;
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operator unspecified_bool_type() const
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{
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return m_ptr ? &wxObjectDataPtr<T>::get : NULL;
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}
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T& operator*() const
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{
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wxASSERT(m_ptr != NULL);
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return *(m_ptr);
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}
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T *operator->() const
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{
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wxASSERT(m_ptr != NULL);
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return get();
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}
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void reset(T *ptr)
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{
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if (m_ptr)
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m_ptr->DecRef();
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m_ptr = ptr;
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}
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T* release()
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{
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T* const ptr = m_ptr;
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m_ptr = NULL;
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return ptr;
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}
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wxObjectDataPtr& operator=(const wxObjectDataPtr &tocopy)
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{
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if (m_ptr)
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m_ptr->DecRef();
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m_ptr = tocopy.m_ptr;
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if (m_ptr)
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m_ptr->IncRef();
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return *this;
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}
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template <typename U>
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wxObjectDataPtr& operator=(const wxObjectDataPtr<U> &tocopy)
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{
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if (m_ptr)
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m_ptr->DecRef();
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m_ptr = tocopy.get();
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if (m_ptr)
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m_ptr->IncRef();
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return *this;
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}
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wxObjectDataPtr& operator=(T *ptr)
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{
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if (m_ptr)
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m_ptr->DecRef();
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m_ptr = ptr;
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return *this;
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}
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private:
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T *m_ptr;
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};
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// ----------------------------------------------------------------------------
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// wxObject: the root class of wxWidgets object hierarchy
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxObject
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{
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public:
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wxObject() { m_refData = NULL; }
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virtual ~wxObject() { UnRef(); }
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wxObject(const wxObject& other)
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{
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m_refData = other.m_refData;
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if (m_refData)
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m_refData->IncRef();
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}
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wxObject& operator=(const wxObject& other)
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{
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if ( this != &other )
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{
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Ref(other);
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}
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return *this;
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}
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bool IsKindOf(const wxClassInfo *info) const;
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virtual wxClassInfo *GetClassInfo() const;
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// Turn on the correct set of new and delete operators
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#ifdef _WX_WANT_NEW_SIZET_WXCHAR_INT
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void *operator new ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 );
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#endif
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#ifdef _WX_WANT_DELETE_VOID
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void operator delete ( void * buf );
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#endif
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#ifdef _WX_WANT_DELETE_VOID_WXCHAR_INT
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void operator delete ( void *buf, const wxChar*, int );
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#endif
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#ifdef _WX_WANT_ARRAY_NEW_SIZET_WXCHAR_INT
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void *operator new[] ( size_t size, const wxChar *fileName = NULL, int lineNum = 0 );
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#endif
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#ifdef _WX_WANT_ARRAY_DELETE_VOID
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void operator delete[] ( void *buf );
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#endif
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#ifdef _WX_WANT_ARRAY_DELETE_VOID_WXCHAR_INT
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void operator delete[] (void* buf, const wxChar*, int );
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#endif
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// ref counted data handling methods
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// get/set
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wxObjectRefData *GetRefData() const { return m_refData; }
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void SetRefData(wxObjectRefData *data) { m_refData = data; }
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// make a 'clone' of the object
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void Ref(const wxObject& clone);
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// destroy a reference
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void UnRef();
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// Make sure this object has only one reference
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void UnShare() { AllocExclusive(); }
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// check if this object references the same data as the other one
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bool IsSameAs(const wxObject& o) const { return m_refData == o.m_refData; }
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// RTTI information, usually declared by wxDECLARE_DYNAMIC_CLASS() or
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// similar, but done manually for the hierarchy root. Note that it's public
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// for compatibility reasons, but shouldn't be accessed directly.
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static wxClassInfo ms_classInfo;
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protected:
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// ensure that our data is not shared with anybody else: if we have no
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// data, it is created using CreateRefData() below, if we have shared data
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// it is copied using CloneRefData(), otherwise nothing is done
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void AllocExclusive();
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// both methods must be implemented if AllocExclusive() is used, not pure
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// virtual only because of the backwards compatibility reasons
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// create a new m_refData
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virtual wxObjectRefData *CreateRefData() const;
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// create a new m_refData initialized with the given one
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virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
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wxObjectRefData *m_refData;
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};
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inline wxObject *wxCheckDynamicCast(wxObject *obj, wxClassInfo *classInfo)
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{
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return obj && obj->GetClassInfo()->IsKindOf(classInfo) ? obj : NULL;
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}
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#include "wx/xti2.h"
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// ----------------------------------------------------------------------------
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// more debugging macros
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// ----------------------------------------------------------------------------
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#if wxUSE_DEBUG_NEW_ALWAYS
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#define WXDEBUG_NEW new(__TFILE__,__LINE__)
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#if wxUSE_GLOBAL_MEMORY_OPERATORS
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#define new WXDEBUG_NEW
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#elif defined(__VISUALC__)
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// Including this file redefines new and allows leak reports to
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// contain line numbers
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#include "wx/msw/msvcrt.h"
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#endif
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#endif // wxUSE_DEBUG_NEW_ALWAYS
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// ----------------------------------------------------------------------------
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// Compatibility macro aliases IMPLEMENT group
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// ----------------------------------------------------------------------------
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// deprecated variants _not_ requiring a semicolon after them and without wx prefix.
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// (note that also some wx-prefixed macro do _not_ require a semicolon because
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// it's not always possible to force the compiler to require it)
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#define IMPLEMENT_DYNAMIC_CLASS(n,b) wxIMPLEMENT_DYNAMIC_CLASS(n,b)
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#define IMPLEMENT_DYNAMIC_CLASS2(n,b1,b2) wxIMPLEMENT_DYNAMIC_CLASS2(n,b1,b2)
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#define IMPLEMENT_ABSTRACT_CLASS(n,b) wxIMPLEMENT_ABSTRACT_CLASS(n,b)
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#define IMPLEMENT_ABSTRACT_CLASS2(n,b1,b2) wxIMPLEMENT_ABSTRACT_CLASS2(n,b1,b2)
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#define IMPLEMENT_CLASS(n,b) wxIMPLEMENT_CLASS(n,b)
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#define IMPLEMENT_CLASS2(n,b1,b2) wxIMPLEMENT_CLASS2(n,b1,b2)
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#define IMPLEMENT_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_PLUGGABLE_CLASS(n,b)
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#define IMPLEMENT_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_PLUGGABLE_CLASS2(n,b,b2)
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#define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS(n,b)
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#define IMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2)
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#define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS(n,b)
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#define IMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_USER_EXPORTED_PLUGGABLE_CLASS2(n,b,b2)
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#define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,b) wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS(n,b)
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#define IMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2) wxIMPLEMENT_USER_EXPORTED_ABSTRACT_PLUGGABLE_CLASS2(n,b,b2)
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#define CLASSINFO(n) wxCLASSINFO(n)
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#endif // _WX_OBJECTH__
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