#ifndef TNZ_VALUEFIELD_INCLUDED
#define TNZ_VALUEFIELD_INCLUDED

#include "tw/tw.h"
#include "ttimer.h"

#undef DVAPI
#undef DVVAR
#ifdef TWIN_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif

class TTextField;
class TNumField;

class TValueFieldActionInterface;
class TValuePairFieldActionInterface;

#ifdef WIN32
#pragma warning(push)
#pragma warning(disable : 4251)
#endif

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

class DVAPI TValueField : public TWidget
{
protected:
	wstring m_labelText;
	int m_labelWidth, m_fieldWidth;
	double m_value, m_minValue, m_maxValue;

	// serve nel drag
	int m_deltaPos;
	TPoint m_lastPos;
	bool m_draggingArrow;
	bool m_draggingSlider;

	TRect m_sliderRect;
	TRect m_arrowRect;
	TNumField *m_textField;
	bool m_arrowEnabled, m_sliderEnabled;
	vector<TValueFieldActionInterface *> m_actions;

	double posToValue(int x) const;
	int valueToPos(double v) const;
	int m_precision;

	void sendCommand(bool dragging);

public:
	TValueField(TWidget *parent, string name = "floatfield", bool withField = true);
	~TValueField();

	void enableSlider(bool on);
	void enableArrow(bool on);

	void repaint();
	void configureNotify(const TDimension &d);

	void leftButtonDown(const TMouseEvent &e);
	void leftButtonDrag(const TMouseEvent &e);
	void leftButtonUp(const TMouseEvent &e);

	void addAction(TValueFieldActionInterface *action);

	double getValue() const { return m_value; }
	void setValue(double value, bool sendCommand = true);

	void onTextFieldChange();
	void onTextFieldChange(bool dragging);

	void getValueRange(double &min, double &max) const
	{
		min = m_minValue;
		max = m_maxValue;
	};
	void setValueRange(double min, double max);

	void setLabel(string text);
	void setLabelWidth(int lx);
	void setFieldWidth(int lx);

	void setPrecision(int d);
	int getPrecision() const { return m_precision; }
};

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

class DVAPI TValueFieldActionInterface
{
public:
	TValueFieldActionInterface() {}
	virtual ~TValueFieldActionInterface() {}
	virtual void triggerAction(TValueField *vf, double value, bool dragging) = 0;
};

template <class T>
class TValueFieldAction : public TValueFieldActionInterface
{
	typedef void (T::*Method)(TValueField *vf, double value, bool dragging);
	T *m_target;
	Method m_method;

public:
	TValueFieldAction(T *target, Method method) : m_target(target), m_method(method) {}
	void triggerAction(TValueField *vf, double value, bool dragging)
	{
		(m_target->*m_method)(vf, value, dragging);
	}
};

template <class T>
inline void tconnect(TValueField &src, T *target, void (T::*method)(TValueField *vf, double value, bool dragging))
{
	src.addAction(new TValueFieldAction<T>(target, method));
}

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

class DVAPI TValuePairField : public TWidget
{
protected:
	wstring m_labelText;
	int m_labelWidth;
	double m_value0, m_value1, m_minValue, m_maxValue;
	double m_newValue0, m_newValue1;
	bool m_first;
	// servono nel drag
	int m_deltaPos;
	int m_flags;
	TTimer m_timer;
	TRect m_sliderRect, m_arrow0Rect, m_arrow1Rect;
	TNumField *m_textField0, *m_textField1;
	bool m_arrowEnabled, m_sliderEnabled;
	vector<TValuePairFieldActionInterface *> m_actions;

	double posToValue(int x) const;
	int valueToPos(double v) const;

	void sendCommand(bool dragging);
	void onMMTimer(TUINT64 tick);

public:
	TValuePairField(TWidget *parent, string name = "valuepairfield");
	~TValuePairField();

	void enableSlider(bool on);
	void enableArrow(bool on);

	void repaint();
	void configureNotify(const TDimension &d);

	void leftButtonDown(const TMouseEvent &e);
	void leftButtonDrag(const TMouseEvent &e);
	void leftButtonUp(const TMouseEvent &e);

	void addAction(TValuePairFieldActionInterface *action);

	double getValue0() const { return m_value0; }
	double getValue1() const
	{
		return m_value1;
	}
	void setValue0(double value, bool dragging = true);
	void setValue1(double value, bool dragging = true);
	void setValues(double value0, double value1, bool dragging = true);

	void getValueRange(double &min, double &max) const
	{
		min = m_minValue;
		max = m_maxValue;
	};
	void setValueRange(double min, double max);

	void setLabel(string text);
	void setLabelWidth(int width);

	void onTextFieldChange(bool first);
};

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

class DVAPI TValuePairFieldActionInterface
{
public:
	TValuePairFieldActionInterface() {}
	virtual ~TValuePairFieldActionInterface() {}
	virtual void triggerAction(TValuePairField *vf, double value0, double value1, bool dragging) = 0;
};

template <class T>
class TValuePairFieldAction : public TValuePairFieldActionInterface
{
	typedef void (T::*Method)(TValuePairField *vf, double value0, double value1, bool dragging);
	T *m_target;
	Method m_method;

public:
	TValuePairFieldAction(T *target, Method method) : m_target(target), m_method(method) {}
	void triggerAction(TValuePairField *vf, double value0, double value1, bool dragging)
	{
		(m_target->*m_method)(vf, value0, value1, dragging);
	}
};

template <class T>
inline void tconnect(TValuePairField &src, T *target,
					 void (T::*method)(TValuePairField *vf, double value0, double value1, bool dragging))
{
	src.addAction(new TValuePairFieldAction<T>(target, method));
}

#ifdef WIN32
#pragma warning(pop)
#endif

#endif