#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