#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