51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
/*
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* ValueChangeAction.hpp
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*
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* Created on: 10 июн. 2020 г.
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* Author: LeonidTitov
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*/
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#ifndef UMLIBRARY_SCHEMATIC_ACTION_VALUECHANGEACTION_HPP_
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#define UMLIBRARY_SCHEMATIC_ACTION_VALUECHANGEACTION_HPP_
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#include "../../systemic/IFunctor.hh"
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#include "../../systemic/IValue.hpp"
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#include "../../systemic/IProcess.hh"
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namespace schematic { namespace functor {
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template<typename ValueType>
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struct ValueChangeAction : public systemic::IProcess {
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typedef systemic::IValue<ValueType> Value;
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typedef systemic::IFunctor<void> Action;
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Value & value;
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Action & action;
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const ValueType expected;
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ValueType previous;
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void process();
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ValueChangeAction( Value & value, Action & action, ValueType expected ) : value(value), action(action), expected(expected), previous(expected) {}
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};
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}
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}
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template<typename ValueType>
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inline void schematic::functor::ValueChangeAction<ValueType>::process() {
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ValueType current = value;
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if( current == expected and previous != expected )
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action();
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previous = current;
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}
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#endif /* UMLIBRARY_SCHEMATIC_ACTION_VALUECHANGEACTION_HPP_ */
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