#pragma once

#ifndef TNZ_SCROLLBAR_INCLUDED

#define TNZ_SCROLLBAR_INCLUDED

//#include "tw/action.h"

//#include "traster.h"

#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 TScrollbarGenericAction {

public:

  TScrollbarGenericAction() {}

  virtual ~TScrollbarGenericAction() {}

  virtual void notify(int value) = 0;

};

template <class t=""></class>

class TScrollbarAction : public TScrollbarGenericAction {

public:

  typedef void (T::*CommandMethod)(int value);

  T *m_target;

  CommandMethod m_method;

  TScrollbarAction<t>(T *target, CommandMethod method)</t>

      : m_target(target), m_method(method){};

  void notify(int value) { (m_target->*m_method)(value); };

};

class DVAPI TScrollbar : public TWidget {

  int m_oldPos;

  int m_gPos, m_gMinPos, m_gMaxPos, m_gSize;

  int m_value, m_minValue, m_maxValue, m_cursorSize;

  const int m_buttonAreaSize;

  TScrollbarGenericAction *m_action;

  bool m_firstButtonPressed, m_secondButtonPressed;

  bool m_horizontal;

  bool m_minOverflowEnabled;

  bool m_maxOverflowEnabled;

  int m_buttonIncrement;

protected:

  void updatePositions();

  void drawHCursor(int x0, int x1);

  void drawVCursor(int y0, int y1);

  enum ButtonId { FIRST_BUTTON, SECOND_BUTTON };

  void drawButton(ButtonId id);

public:

  TScrollbar(TWidget *parent, string name = "scrollbar");

  ~TScrollbar();

  void repaint();

  void leftButtonDown(const TMouseEvent &);

  void leftButtonDrag(const TMouseEvent &);

  void leftButtonUp(const TMouseEvent &);

  void configureNotify(const TDimension &d);

  void setValue(int value, int min, int max, int size);

  int getValue() const { return m_value; }

  // min <= value <= max

  // il cursore occupa almeno size/(max-min+size) dell'area disponibile

  // se size = 0 non c'e' cursore e lo slider e' disabilitato

  // se size>=max-min il cursore occupa tutto lo spazio e lo slider e'

  // disabilitato

  //

  // value == min quando il cursore e' in alto

  // value == max quando il cursore e' in basso

  //

  // quando vengono premuti i bottoni value viene incrementato/decrementato di

  // uno

  //

  // abilita/disabilita la possibilita' di agire sui bottoni anche

  // quando lo slider e' gia' sul massimo/minimo

  // default: false/false

  void enableButtonOverflow(bool min, bool max);

  // default: 4

  void setButtonIncrement(int d);

  void setAction(TScrollbarGenericAction *action);

  void onTimer(int v);

};

#endif