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319 lines
9 KiB
C++
319 lines
9 KiB
C++
/*!
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@file
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@author Albert Semenov
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@date 11/2007
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@module
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*/
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/*
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This file is part of MyGUI.
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MyGUI is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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MyGUI is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with MyGUI. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace delegates
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{
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#define MYGUI_COMBINE(a, b) MYGUI_COMBINE1(a, b)
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#define MYGUI_COMBINE1(a, b) a##b
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#define MYGUI_I_DELEGATE MYGUI_COMBINE(IDelegate, MYGUI_SUFFIX)
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#define MYGUI_C_STATIC_DELEGATE MYGUI_COMBINE(CStaticDelegate, MYGUI_SUFFIX)
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#define MYGUI_C_METHOD_DELEGATE MYGUI_COMBINE(CMethodDelegate, MYGUI_SUFFIX)
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#define MYGUI_C_DELEGATE MYGUI_COMBINE(CDelegate, MYGUI_SUFFIX)
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#define MYGUI_C_MULTI_DELEGATE MYGUI_COMBINE(CMultiDelegate, MYGUI_SUFFIX)
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// базовый класс всех делегатов
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MYGUI_TEMPLATE MYGUI_TEMPLATE_PARAMS
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class MYGUI_I_DELEGATE
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{
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public:
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virtual ~MYGUI_I_DELEGATE() { }
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virtual bool isType( const std::type_info& _type) = 0;
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virtual void invoke( MYGUI_PARAMS ) = 0;
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virtual bool compare( MYGUI_I_DELEGATE MYGUI_TEMPLATE_ARGS * _delegate) const = 0;
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virtual bool compare(IDelegateUnlink * _unlink) const { return false; }
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};
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// делегат для статической функции
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MYGUI_TEMPLATE MYGUI_TEMPLATE_PARAMS
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class MYGUI_C_STATIC_DELEGATE : public MYGUI_I_DELEGATE MYGUI_TEMPLATE_ARGS
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{
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public:
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typedef void (*Func)( MYGUI_PARAMS );
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MYGUI_C_STATIC_DELEGATE (Func _func) : mFunc(_func) { }
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virtual bool isType( const std::type_info& _type) { return typeid( MYGUI_C_STATIC_DELEGATE MYGUI_TEMPLATE_ARGS ) == _type; }
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virtual void invoke( MYGUI_PARAMS )
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{
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mFunc( MYGUI_ARGS );
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}
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virtual bool compare( MYGUI_I_DELEGATE MYGUI_TEMPLATE_ARGS * _delegate) const
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{
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if (nullptr == _delegate || !_delegate->isType(typeid(MYGUI_C_STATIC_DELEGATE MYGUI_TEMPLATE_ARGS)) ) return false;
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MYGUI_C_STATIC_DELEGATE MYGUI_TEMPLATE_ARGS * cast = static_cast<MYGUI_C_STATIC_DELEGATE MYGUI_TEMPLATE_ARGS *>(_delegate);
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return cast->mFunc == mFunc;
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}
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virtual bool compare(IDelegateUnlink * _unlink) const { return false; }
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private:
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Func mFunc;
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};
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// делегат для метода класса
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template MYGUI_T_TEMPLATE_PARAMS
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class MYGUI_C_METHOD_DELEGATE : public MYGUI_I_DELEGATE MYGUI_TEMPLATE_ARGS
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{
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public:
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typedef void (T::*Method)( MYGUI_PARAMS );
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MYGUI_C_METHOD_DELEGATE(IDelegateUnlink * _unlink, T * _object, Method _method) : mUnlink(_unlink), mObject(_object), mMethod(_method) { }
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virtual bool isType( const std::type_info& _type) { return typeid( MYGUI_C_METHOD_DELEGATE MYGUI_T_TEMPLATE_ARGS ) == _type; }
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virtual void invoke( MYGUI_PARAMS )
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{
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(mObject->*mMethod)( MYGUI_ARGS );
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}
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virtual bool compare( MYGUI_I_DELEGATE MYGUI_TEMPLATE_ARGS * _delegate) const
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{
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if (nullptr == _delegate || !_delegate->isType(typeid(MYGUI_C_METHOD_DELEGATE MYGUI_T_TEMPLATE_ARGS)) ) return false;
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MYGUI_C_METHOD_DELEGATE MYGUI_T_TEMPLATE_ARGS * cast = static_cast< MYGUI_C_METHOD_DELEGATE MYGUI_T_TEMPLATE_ARGS * >(_delegate);
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return cast->mObject == mObject && cast->mMethod == mMethod;
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}
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virtual bool compare(IDelegateUnlink * _unlink) const
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{
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return mUnlink == _unlink;
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}
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private:
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IDelegateUnlink *mUnlink;
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T * mObject;
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Method mMethod;
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};
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} // namespace delegates
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// шаблон для создания делегата статической функции
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// параметры : указатель на функцию
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// пример : newDelegate(funk_name);
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// пример : newDelegate(class_name::static_method_name);
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MYGUI_TEMPLATE MYGUI_TEMPLATE_PARAMS
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inline delegates::MYGUI_I_DELEGATE MYGUI_TEMPLATE_ARGS * newDelegate( void (*_func)( MYGUI_PARAMS ) )
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{
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return new delegates::MYGUI_C_STATIC_DELEGATE MYGUI_TEMPLATE_ARGS (_func);
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}
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// шаблон для создания делегата метода класса
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// параметры : указатель на объект класса и указатель на метод класса
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// пример : newDelegate(&object_name, &class_name::method_name);
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template MYGUI_T_TEMPLATE_PARAMS
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inline delegates::MYGUI_I_DELEGATE MYGUI_TEMPLATE_ARGS * newDelegate( T * _object, void (T::*_method)( MYGUI_PARAMS ) )
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{
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return new delegates::MYGUI_C_METHOD_DELEGATE MYGUI_T_TEMPLATE_ARGS (delegates::GetDelegateUnlink(_object), _object, _method);
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}
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namespace delegates
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{
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// шаблон класса делегата
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MYGUI_TEMPLATE MYGUI_TEMPLATE_PARAMS
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class MYGUI_C_DELEGATE
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{
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public:
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typedef MYGUI_I_DELEGATE MYGUI_TEMPLATE_ARGS IDelegate;
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MYGUI_C_DELEGATE () : mDelegate(nullptr) { }
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MYGUI_C_DELEGATE (const MYGUI_C_DELEGATE MYGUI_TEMPLATE_ARGS& _event)
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{
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// забираем себе владение
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mDelegate = _event.mDelegate;
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const_cast< MYGUI_C_DELEGATE MYGUI_TEMPLATE_ARGS& >(_event).mDelegate = nullptr;
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}
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~MYGUI_C_DELEGATE () { clear(); }
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bool empty() const { return mDelegate == nullptr; }
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void clear()
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{
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if (mDelegate)
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{
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delete mDelegate;
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mDelegate = nullptr;
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}
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}
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MYGUI_C_DELEGATE MYGUI_TEMPLATE_ARGS & operator=(IDelegate* _delegate)
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{
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delete mDelegate;
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mDelegate = _delegate;
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return *this;
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}
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MYGUI_C_DELEGATE MYGUI_TEMPLATE_ARGS & operator=(const MYGUI_C_DELEGATE MYGUI_TEMPLATE_ARGS& _event)
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{
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// забираем себе владение
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delete mDelegate;
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mDelegate = _event.mDelegate;
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const_cast< MYGUI_C_DELEGATE MYGUI_TEMPLATE_ARGS& >(_event).mDelegate = nullptr;
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return *this;
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}
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void operator()( MYGUI_PARAMS )
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{
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if (mDelegate == nullptr) return;
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mDelegate->invoke( MYGUI_ARGS );
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}
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private:
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IDelegate * mDelegate;
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};
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// шаблон класса мульти делегата
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MYGUI_TEMPLATE MYGUI_TEMPLATE_PARAMS
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class MYGUI_C_MULTI_DELEGATE
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{
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public:
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typedef MYGUI_I_DELEGATE MYGUI_TEMPLATE_ARGS IDelegate;
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typedef MYGUI_TYPENAME std::list<IDelegate* /*, Allocator<IDelegate*>*/ > ListDelegate;
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typedef MYGUI_TYPENAME ListDelegate::iterator ListDelegateIterator;
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typedef MYGUI_TYPENAME ListDelegate::const_iterator ConstListDelegateIterator;
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MYGUI_C_MULTI_DELEGATE () { }
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~MYGUI_C_MULTI_DELEGATE () { clear(); }
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bool empty() const
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{
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for (ConstListDelegateIterator iter = mListDelegates.begin(); iter!=mListDelegates.end(); ++iter)
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{
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if (*iter) return false;
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}
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return true;
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}
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void clear()
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{
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for (ListDelegateIterator iter=mListDelegates.begin(); iter!=mListDelegates.end(); ++iter)
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{
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if (*iter)
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{
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delete (*iter);
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(*iter) = nullptr;
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}
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}
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}
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void clear(IDelegateUnlink * _unlink)
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{
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for (ListDelegateIterator iter=mListDelegates.begin(); iter!=mListDelegates.end(); ++iter)
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{
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if ((*iter) && (*iter)->compare(_unlink))
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{
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delete (*iter);
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(*iter) = nullptr;
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}
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}
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}
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MYGUI_C_MULTI_DELEGATE MYGUI_TEMPLATE_ARGS & operator+=(IDelegate* _delegate)
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{
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for (ListDelegateIterator iter=mListDelegates.begin(); iter!=mListDelegates.end(); ++iter)
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{
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if ((*iter) && (*iter)->compare(_delegate))
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{
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MYGUI_ASSERT(false, "dublicate delegate");
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}
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}
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mListDelegates.push_back(_delegate);
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return *this;
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}
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MYGUI_C_MULTI_DELEGATE MYGUI_TEMPLATE_ARGS & operator-=(IDelegate* _delegate)
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{
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for (ListDelegateIterator iter=mListDelegates.begin(); iter!=mListDelegates.end(); ++iter)
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{
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if ((*iter) && (*iter)->compare(_delegate))
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{
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// проверяем на идентичность делегатов
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if ((*iter) != _delegate) delete (*iter);
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(*iter) = nullptr;
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break;
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}
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}
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delete _delegate;
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return *this;
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}
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void operator()( MYGUI_PARAMS )
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{
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ListDelegateIterator iter = mListDelegates.begin();
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while (iter != mListDelegates.end())
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{
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if (nullptr == (*iter))
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{
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iter = mListDelegates.erase(iter);
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}
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else
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{
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(*iter)->invoke( MYGUI_ARGS );
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++iter;
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}
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}
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}
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private:
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// constructor and operator =, without implementation, just for private
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MYGUI_C_MULTI_DELEGATE (const MYGUI_C_MULTI_DELEGATE MYGUI_TEMPLATE_ARGS & _event);
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MYGUI_C_MULTI_DELEGATE MYGUI_TEMPLATE_ARGS & operator=(const MYGUI_C_MULTI_DELEGATE MYGUI_TEMPLATE_ARGS & _event);
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private:
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ListDelegate mListDelegates;
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};
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#undef MYGUI_COMBINE
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#undef MYGUI_COMBINE1
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#undef MYGUI_I_DELEGATE
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#undef MYGUI_C_STATIC_DELEGATE
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#undef MYGUI_C_METHOD_DELEGATE
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#undef MYGUI_C_DELEGATE
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#undef MYGUI_C_MULTI_DELEGATE
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#undef MYGUI_SUFFIX
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#undef MYGUI_TEMPLATE
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#undef MYGUI_TEMPLATE_PARAMS
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#undef MYGUI_TEMPLATE_ARGS
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#undef MYGUI_T_TEMPLATE_PARAMS
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#undef MYGUI_T_TEMPLATE_ARGS
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#undef MYGUI_PARAMS
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#undef MYGUI_ARGS
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#undef MYGUI_TYPENAME
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} // namespace delegates
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