DVarProperty.hpp

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#pragma once
 
#include "DVarId.hpp"
#include <ivorium_core/ivorium_core.hpp>
#include <optional>
#include <functional>
 
namespace iv
{
 
template< class T >
class DVarProperty : private DVarListenerI
{
public:
ClientMarker cm;
 
                    DVarProperty( Instance * inst, DVarIdT< T > id );
                    ~DVarProperty();
    
    Instance *      instance();
 
    void            value( std::optional< T > const & val );
    
    T               value();
 
    void            on_changed( std::function< void( T const & newval ) > const &, bool call_immediately = false );
    
private:
    virtual void    on_dvar_changed( DVarId id, std::type_index type, void * value ) override;
    
private:
    Instance *          inst;
    DVarSystem *        dvs;
    DVarIdT< T >        _dvar_id;
    std::function< void( T const & newval ) > _on_changed;
    std::optional< T >  _explicit_value;
    T                   _cached_value;
    
};
 
}
 
#include "DVarProperty.inl"