#pragma once

#ifndef TNZ_SCROLLVIEW_INCLUDED

#define TNZ_SCROLLVIEW_INCLUDED

#include "tw/tw.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 TScrollbar;

class DVAPI TScrollView : public TWidget

{

	TPoint m_delta;

	TScrollbar *m_vsb, *m_hsb;

	TDimension m_contentSize;

	bool m_autopanning;

	TPoint m_autopanningPos;

	int m_autopanningOldT;

public:

	TScrollView(TWidget *parent, std::string name = "scrollview");

	~TScrollView();

	void middleButtonDown(const TMouseEvent &e);

	void middleButtonDrag(const TMouseEvent &e);

	void middleButtonUp(const TMouseEvent &e);

	void configureNotify(const TDimension &d);

	void doScrollTo(const TPoint &p);

	inline void doScrollTo(int x, int y) { doScrollTo(TPoint(x, y)); }

	inline void doScrollTo_x(int x) { doScrollTo(TPoint(x, m_yoff)); }

	inline void doScrollTo_y(int y) { doScrollTo(TPoint(m_xoff, y)); }

	virtual void scrollTo(const TPoint &p)

	{

		doScrollTo(p);

	}

	inline void scrollTo(int x, int y) { scrollTo(TPoint(x, y)); }

	inline TPoint getScrollPosition() const

	{

		return TPoint(m_xoff, m_yoff);

	}

	void setScrollbars(TScrollbar *hsb, TScrollbar *vsb);

	void setContentSize(const TDimension &d);

	TDimension getContentSize() const { return m_contentSize; }

	void onVsbChange(int value);

	void onHsbChange(int value);

	void onTimer(int t);

	void startAutopanning();

	void stopAutopanning();

	bool isAutopanning() const { return m_autopanning; }

	virtual void autopanningDrag(const TPoint &pos){};

	// provvisorio

	void updateScrollbars();

};

#endif