//-- Property.hpp --
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/*--------------------------------------------------------------------------
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Class Library
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Copyrights Emad Barsoum (ebarsoum@msn.com) 2003. All rights reserved.
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________________________________________________________________
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PROJECT : General
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MODULE : property
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FILENAME : Property.hpp
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BUILD : 1
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History of Modifications:
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Date(dd/mm/yyyy)Person Description
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---- ------ -----------
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25/03/2003 Emad Barsoum Initial design and coding
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CLASS NAME: property
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VERSION: 1.0
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DESCRIPTION:
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This class try to simulate property for C++, using template technique.
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LICENSE:
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You are free to change or modify or redistribute the code, just keep the header.
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And you can use this class in any application you want without any warranty.
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*/
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#include <assert.h>
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#include <stdlib.h>
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#if !defined INC_PROPERTY_HPP
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#define INC_PROPERTY_HPP
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#define READ_ONLY 1
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#define WRITE_ONLY 2
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#define READ_WRITE 3
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template<typename Container, typename ValueType, int nPropType>
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class property
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{
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public:
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property()
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{
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m_cObject = NULL;
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Set = NULL;
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Get = NULL;
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}
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//-- This to set a pointer to the class that contain the property --
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void setContainer(Container* cObject)
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{
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m_cObject = cObject;
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}
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//-- Set the set member function that will change the value --
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void setter(void (Container::*pSet)(ValueType value))
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{
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if((nPropType == WRITE_ONLY) || (nPropType == READ_WRITE))
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Set = pSet;
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else
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Set = NULL;
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}
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//-- Set the get member function that will retrieve the value --
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void getter(ValueType (Container::*pGet)())
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{
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if((nPropType == READ_ONLY) || (nPropType == READ_WRITE))
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Get = pGet;
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else
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Get = NULL;
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}
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//-- Overload the '=' sign to set the value using the set member --
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ValueType operator =(const ValueType& value)
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{
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assert(m_cObject != NULL);
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assert(Set != NULL);
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(m_cObject->*Set)(value);
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return value;
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}
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//-- To make possible to cast the property class to the internal type --
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operator ValueType()
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{
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assert(m_cObject != NULL);
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assert(Get != NULL);
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return (m_cObject->*Get)();
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}
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private:
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Container* m_cObject;//-- Pointer to the module that contain the property --
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void (Container::*Set)(ValueType value);//-- Pointer to set member function --
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ValueType (Container::*Get)();//-- Pointer to get member function --
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};
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#endif
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