khanat-opennel-code/code/nel/samples/3d/nel_qt/callback.h

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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef NLQT_CALLBACK_H
#define NLQT_CALLBACK_H
#include <nel/misc/types_nl.h>
// STL includes
// NeL includes
#include <nel/misc/debug.h>
// Project includes
namespace NLQT {
#define NLQT_CALLBACK_TEMPLATE \
/** \
* \brief NLQT_CALLBACK_ARGS_CLASS \
* \date 2009-03-03 18:09GMT \
* \author Jan Boon (Kaetemi) \
* Awesome callback template \
*/ \
template<typename TReturn NLQT_CALLBACK_ARGS_TYPENAME> \
class NLQT_CALLBACK_ARGS_CLASS \
{ \
/* Very simple reference counting callback base */ \
class CCallbackBase \
{ \
public: \
CCallbackBase() : m_RefCount(0) \
{ \
\
} \
\
virtual ~CCallbackBase() \
{ \
nlassert(!m_RefCount); \
} \
\
void refAdd() \
{ \
++m_RefCount; \
} \
\
void refRemove() \
{ \
--m_RefCount; \
if (!m_RefCount) \
delete this; \
} \
\
virtual TReturn callback(NLQT_CALLBACK_ARGS_DECL) = 0; \
\
virtual bool equals(const CCallbackBase *callbackBase) = 0; \
\
/* disable copy */ \
CCallbackBase(const CCallbackBase &); \
CCallbackBase &operator=(const CCallbackBase &); \
\
private: \
uint m_RefCount; \
}; \
\
typedef TReturn TCallbackFunction(NLQT_CALLBACK_ARGS_DECL); \
class CCallbackFunction : public CCallbackBase \
{ \
public: \
CCallbackFunction(TCallbackFunction *callbackFunction) : m_CallbackFunction(callbackFunction) \
{ \
nlassert(m_CallbackFunction); \
} \
\
virtual ~CCallbackFunction() \
{ \
m_CallbackFunction = NULL; \
} \
\
virtual TReturn callback(NLQT_CALLBACK_ARGS_DECL) \
{ \
return m_CallbackFunction(NLQT_CALLBACK_ARGS_IMPL); \
} \
\
virtual bool equals(const CCallbackBase *callbackBase) \
{ \
const CCallbackFunction *callbackFunction = \
dynamic_cast<const CCallbackFunction *>(callbackBase); \
if (!callbackFunction) return false; \
return m_CallbackFunction == callbackFunction->m_CallbackFunction; \
} \
\
private: \
TCallbackFunction *m_CallbackFunction; \
}; \
\
template<typename TClass> \
class CCallbackMethod : public CCallbackBase \
{ \
typedef TReturn (TClass::*TCallbackMethod)(NLQT_CALLBACK_ARGS_DECL); \
public: \
CCallbackMethod(TClass *callbackObject, TCallbackMethod callbackMethod) : m_CallbackObject(callbackObject), m_CallbackMethod(callbackMethod) \
{ \
nlassert(m_CallbackObject); \
nlassert(m_CallbackMethod); \
} \
\
virtual ~CCallbackMethod() \
{ \
m_CallbackObject = NULL; \
m_CallbackMethod = NULL; \
} \
\
virtual TReturn callback(NLQT_CALLBACK_ARGS_DECL) \
{ \
return (m_CallbackObject->*m_CallbackMethod)(NLQT_CALLBACK_ARGS_IMPL); \
} \
\
virtual bool equals(const CCallbackBase *callbackBase) \
{ \
const CCallbackMethod *callbackMethod = \
dynamic_cast<const CCallbackMethod *>(callbackBase); \
if (!callbackMethod) return false; \
return m_CallbackObject == callbackMethod->m_CallbackObject \
&& m_CallbackMethod == callbackMethod->m_CallbackMethod; \
} \
\
private: \
TClass *m_CallbackObject; \
TCallbackMethod m_CallbackMethod; \
}; \
\
public: \
CCallback() : m_CallbackBase(NULL) \
{ \
\
} \
\
CCallback(TCallbackFunction *callbackFunction) : m_CallbackBase(new CCallbackFunction(callbackFunction)) \
{ \
nlassert(m_CallbackBase); \
m_CallbackBase->refAdd(); \
} \
\
template<typename TClass> \
CCallback(TClass *callbackObject, TReturn (TClass::*callbackMethod)(NLQT_CALLBACK_ARGS_DECL)) : m_CallbackBase(new CCallbackMethod<TClass>(callbackObject, callbackMethod)) \
{ \
nlassert(m_CallbackBase); \
m_CallbackBase->refAdd(); \
} \
\
CCallback(const CCallback &callback) \
{ \
m_CallbackBase = callback.m_CallbackBase; \
if (m_CallbackBase) \
m_CallbackBase->refAdd(); \
} \
\
CCallback &operator=(const CCallback &callback) \
{ \
if (m_CallbackBase != callback.m_CallbackBase) \
{ \
if (m_CallbackBase) \
m_CallbackBase->refRemove(); \
m_CallbackBase = callback.m_CallbackBase; \
if (m_CallbackBase) \
m_CallbackBase->refAdd(); \
} \
return *this; \
} \
\
~CCallback() \
{ \
if (m_CallbackBase) \
{ \
m_CallbackBase->refRemove(); \
m_CallbackBase = NULL; \
} \
} \
\
TReturn callback(NLQT_CALLBACK_ARGS_DECL) \
{ \
nlassert(m_CallbackBase); \
return m_CallbackBase->callback(NLQT_CALLBACK_ARGS_IMPL); \
} \
\
TReturn operator()(NLQT_CALLBACK_ARGS_DECL) \
{ \
nlassert(m_CallbackBase); \
return m_CallbackBase->callback(NLQT_CALLBACK_ARGS_IMPL); \
} \
\
bool valid() const \
{ \
return m_CallbackBase != NULL; \
} \
\
operator bool() const \
{ \
return m_CallbackBase != NULL; \
} \
\
bool operator==(const CCallback &callback) \
{ \
return m_CallbackBase->equals(callback.m_CallbackBase); \
} \
\
private: \
CCallbackBase *m_CallbackBase; \
\
}; /* class CCallback */ \
template<typename TReturn, typename TArgsA = void, typename TArgsB = void, typename TArgsC = void, typename TArgsD = void, typename TArgsE = void, typename TArgsF = void, typename TArgsG = void, typename TDummy = void>
class CCallback;
#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, void, void, void, void, void, void, void, void>
#define NLQT_CALLBACK_ARGS_TYPENAME
#define NLQT_CALLBACK_ARGS_DECL
#define NLQT_CALLBACK_ARGS_IMPL
NLQT_CALLBACK_TEMPLATE
#undef NLQT_CALLBACK_ARGS_CLASS
#undef NLQT_CALLBACK_ARGS_TYPENAME
#undef NLQT_CALLBACK_ARGS_DECL
#undef NLQT_CALLBACK_ARGS_IMPL
#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, void, void, void, void, void, void, void>
#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA
#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA
#define NLQT_CALLBACK_ARGS_IMPL argsA
NLQT_CALLBACK_TEMPLATE
#undef NLQT_CALLBACK_ARGS_CLASS
#undef NLQT_CALLBACK_ARGS_TYPENAME
#undef NLQT_CALLBACK_ARGS_DECL
#undef NLQT_CALLBACK_ARGS_IMPL
#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, void, void, void, void, void, void>
#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB
#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB
#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB
NLQT_CALLBACK_TEMPLATE
#undef NLQT_CALLBACK_ARGS_CLASS
#undef NLQT_CALLBACK_ARGS_TYPENAME
#undef NLQT_CALLBACK_ARGS_DECL
#undef NLQT_CALLBACK_ARGS_IMPL
#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, void, void, void, void, void>
#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC
#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC
#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC
NLQT_CALLBACK_TEMPLATE
#undef NLQT_CALLBACK_ARGS_CLASS
#undef NLQT_CALLBACK_ARGS_TYPENAME
#undef NLQT_CALLBACK_ARGS_DECL
#undef NLQT_CALLBACK_ARGS_IMPL
#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, TArgsD, void, void, void, void>
#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC, typename TArgsD
#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC, TArgsD argsD
#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC, argsD
NLQT_CALLBACK_TEMPLATE
#undef NLQT_CALLBACK_ARGS_CLASS
#undef NLQT_CALLBACK_ARGS_TYPENAME
#undef NLQT_CALLBACK_ARGS_DECL
#undef NLQT_CALLBACK_ARGS_IMPL
#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, TArgsD, TArgsE, void, void, void>
#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC, typename TArgsD, typename TArgsE
#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC, TArgsD argsD, TArgsE argsE
#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC, argsD, argsE
NLQT_CALLBACK_TEMPLATE
#undef NLQT_CALLBACK_ARGS_CLASS
#undef NLQT_CALLBACK_ARGS_TYPENAME
#undef NLQT_CALLBACK_ARGS_DECL
#undef NLQT_CALLBACK_ARGS_IMPL
#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, TArgsD, TArgsE, TArgsF, void, void>
#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC, typename TArgsD, typename TArgsE, typename TArgsF
#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC, TArgsD argsD, TArgsE argsE, TArgsF argsF
#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC, argsD, argsE, argsF
NLQT_CALLBACK_TEMPLATE
#undef NLQT_CALLBACK_ARGS_CLASS
#undef NLQT_CALLBACK_ARGS_TYPENAME
#undef NLQT_CALLBACK_ARGS_DECL
#undef NLQT_CALLBACK_ARGS_IMPL
#define NLQT_CALLBACK_ARGS_CLASS CCallback<TReturn, TArgsA, TArgsB, TArgsC, TArgsD, TArgsE, TArgsF, TArgsG, void>
#define NLQT_CALLBACK_ARGS_TYPENAME , typename TArgsA, typename TArgsB, typename TArgsC, typename TArgsD, typename TArgsE, typename TArgsF, typename TArgsG
#define NLQT_CALLBACK_ARGS_DECL TArgsA argsA, TArgsB argsB, TArgsC argsC, TArgsD argsD, TArgsE argsE, TArgsF argsF, TArgsG argsG
#define NLQT_CALLBACK_ARGS_IMPL argsA, argsB, argsC, argsD, argsE, argsF, argsG
NLQT_CALLBACK_TEMPLATE
#undef NLQT_CALLBACK_ARGS_CLASS
#undef NLQT_CALLBACK_ARGS_TYPENAME
#undef NLQT_CALLBACK_ARGS_DECL
#undef NLQT_CALLBACK_ARGS_IMPL
#undef NLQT_CALLBACK_ARGS_CLASSNAME
#undef NLQT_CALLBACK_TEMPLATE
typedef CCallback<void> CEmptyCallback;
} /* namespace NLQT */
#endif /* #ifndef NLQT_CALLBACK_H */
/* end of file */