#ifndef TDOUBLEPARAM_H

#define TDOUBLEPARAM_H

// TnzCore includes

#include "tgeometry.h"

#include "tfilepath.h"

// TnzBase includes

#include "tparam.h"

#include "tparamchange.h"

// STD includes

#include <set></set>

#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

//=========================================================

//    Forward declarations

class TDoubleParam;

class TDoubleKeyframe;

class TMeasure;

class TExpression;

class TDoubleKeyframe;

namespace TSyntax

{

class Grammar;

class CalculatorNodeVisitor;

}

#ifdef WIN32

template class DVAPI TPersistDeclarationT<tdoubleparam>;</tdoubleparam>

#endif

//=========================================================

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

//    TDoubleParam  declaration

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

class DVAPI TDoubleParam : public TParam

{

	PERSIST_DECLARATION(TDoubleParam)

	class Imp;

	Imp *m_imp;

public:

	TDoubleParam(double v = 0.0);

	TDoubleParam(const TDoubleParam &src);

	~TDoubleParam();

	TDoubleParam &operator=(const TDoubleParam &);

	TParam *clone() const { return new TDoubleParam(*this); }

	void copy(TParam *src);

	string getMeasureName() const;

	void setMeasureName(string name);

	TMeasure *getMeasure() const;

	void setValueRange(double min, double max, double step = 1.0);

	bool getValueRange(double &min, double &max, double &step) const;

	double getDefaultValue() const;

	void setDefaultValue(double value);

	double getValue(double frame, bool leftmost = false) const;

	// note: if frame is a keyframe separating two segments of different types

	// (e.g. expression and linear) then getValue(frame,true) can be != getValue(frame,false)

	bool setValue(double frame, double value);

	// returns the incoming speed vector for keyframe kIndex. kIndex-1 must be speedinout

	// if kIndex is not speedinout and handle are linked then recomputes speed.y taking

	// in account the next segment

	TPointD getSpeedIn(int kIndex) const;

	// returns the outcoming speed vector for keyframe kIndex. kIndex must be speedinout

	TPointD getSpeedOut(int kIndex) const;

	//TPointD getSpeed(double frame);

	// a specific grammar defines expressions as 'peg2.ns' and allows to

	// create a link to the appropriate data source (e.g.

	// the correct stageobject tree)

	const TSyntax::Grammar *getGrammar() const;

	void setGrammar(const TSyntax::Grammar *grammar); // doesn't get ownership.

	void accept(TSyntax::CalculatorNodeVisitor &visitor);

	//! cycle controls extrapolation after the last keyframe

	void enableCycle(bool enabled);

	bool isCycleEnabled() const;

	int getKeyframeCount() const;

	void getKeyframes(std::set<double> &frames) const;</double>

	double keyframeIndexToFrame(int index) const;

	const TDoubleKeyframe &getKeyframe(int index) const;

	const TDoubleKeyframe &getKeyframeAt(double frame) const;

	//! assign k to the kIndex-th keyframe; postcondition: m_frame order is maintained

	void setKeyframe(int kIndex, const TDoubleKeyframe &k);

	//! call setKeyframe(it.first,it.second) for each it in ks; postcondition: m_frame order is maintained

	void setKeyframes(const std::map<int, tdoublekeyframe=""> &ks);</int,>

	//! create a keyframe in k.m_frame (if is needed) and assign k to it

	void setKeyframe(const TDoubleKeyframe &k);

	bool isKeyframe(double frame) const;

	bool hasKeyframes() const;

	void deleteKeyframe(double frame);

	void clearKeyframes();

	int getClosestKeyframe(double frame) const;

	int getNextKeyframe(double frame) const;

	int getPrevKeyframe(double frame) const;

	void assignKeyframe(

		double frame,

		const TParamP &src, double srcFrame,

		bool changedOnly);

	bool isAnimatable() const { return true; }

	void addObserver(TParamObserver *observer);

	void removeObserver(TParamObserver *observer);

	const std::set<tparamobserver *=""> &observers() const;</tparamobserver>

	//! no keyframes, default value not changed

	bool isDefault() const;

	void loadData(TIStream &is);

	void saveData(TOStream &os);

	string getStreamTag() const;

	string getValueAlias(double frame, int precision);

};

//---------------------------------------------------------

DEFINE_PARAM_SMARTPOINTER(TDoubleParam, double)

#endif // TDOUBLEPARAM_H