#ifndef TDOUBLEPARAMRELAYPROPERTY_H

#define TDOUBLEPARAMRELAYPROPERTY_H

// TnzCore includes

#include "tproperty.h"

// TnzBase includes

#include "tdoubleparam.h"

#undef DVAPI

#undef DVVAR

#ifdef TPARAM_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

//*****************************************************************************

//    TDoubleParamRelayProperty  declaration

//*****************************************************************************

//! The TDoubleParamRelayProperty is a TProperty heir which can be used as

//! intermediary between a TDoubleParam instance and its GUI viewers.

class DVAPI TDoubleParamRelayProperty : public TProperty, public TParamObserver

{

	TDoubleParamP m_param; //!< The referenced param

	double m_frame;		   //!< Frame at which m_param returns values

public:

	class Visitor

	{

	public:

		virtual void visit(TDoubleParamRelayProperty *p) = 0;

	};

public:

	TDoubleParamRelayProperty(const std::string &name, TDoubleParamP param = TDoubleParamP());

	~TDoubleParamRelayProperty();

	TDoubleParamRelayProperty(const TDoubleParamRelayProperty &other);

	TDoubleParamRelayProperty &operator=(const TDoubleParamRelayProperty &other);

	TProperty *clone() const;

	std::string getValueAsString();

	void setParam(const TDoubleParamP ¶m);

	const TDoubleParamP &getParam() const { return m_param; }

	void setValue(double v);

	double getValue() const;

	double frame() const { return m_frame; }

	double &frame() { return m_frame; }

	void accept(TProperty::Visitor &v);

	void onChange(const TParamChange &);

};

#endif // TDOUBLEPARAMRELAYPROPERTY_H