MRChangeValue.h

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#pragma once
#include "MRHistoryAction.h"
#include "MRAffineXf3.h"
#include <memory>
 
namespace MR
{
 
 
template <typename T>
class ChangeValue : public HistoryAction
{
public:
    ChangeValue( const std::string& name, T* currentValue, T oldValue ) :
        name_{ name },
        currentValue_{ currentValue },
        oldValue_{ oldValue }
    {}
 
    virtual std::string name() const override
    {
        return name_;
    }
 
    virtual void action( HistoryAction::Type ) override
    {
        if ( !currentValue_ )
            return;
        std::swap( *currentValue_, oldValue_ );
    }
 
    [[nodiscard]] virtual size_t heapBytes() const override
    {
        return name_.capacity();
    }
 
private:
    std::string name_;
    T* currentValue_ = nullptr;
    T oldValue_;
};
 
}