#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 TScrollbarAction : public TScrollbarGenericAction
{
public:
typedef void (T::*CommandMethod)(int value);
T *m_target;
CommandMethod m_method;
TScrollbarAction<T>(T *target, CommandMethod method) : 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