/*-------------------------------------------------------*/
/* */
/* Calc.h: Header file for Calc.cpp */
/* */
/*-------------------------------------------------------*/
/*
* Turbo Vision - Version 2.0
*
* Copyright (c) 1994 by Borland International
* All Rights Reserved.
*
*/
#if !defined( __CALC_H )
#define __CALC_H
#if !defined( __MATH_H )
#include <math.h>
#endif // __MATH_H
#define DISPLAYLEN 25 // Length (width) of calculator display
enum TCalcState { csFirst = 1, csValid, csError };
const int cmCalcButton = 200;
/**
** Calculator display window
**/
class TCalcDisplay : public TView
{
public:
TCalcDisplay(TRect& r);
TCalcDisplay( StreamableInit ) : TView(streamableInit) { };
~TCalcDisplay();
virtual TPalette& getPalette() const;
virtual void handleEvent(TEvent& event);
virtual void draw();
private:
TCalcState status;
char *number;
char sign;
char operate; // since 'operator' is a reserved word.
double operand;
void calcKey(unsigned char key);
void checkFirst();
void setDisplay(double r);
void clear();
void error();
inline double getDisplay() { return( atof( number ) ); };
virtual const char *streamableName() const
{ return name; }
protected:
virtual void write( opstream& );
virtual void *read( ipstream& );
public:
static const char * const name;
static TStreamable *build();
};
inline ipstream& operator >> ( ipstream& is, TCalcDisplay& cl )
{ return is >> (TStreamable&) cl; }
inline ipstream& operator >> ( ipstream& is, TCalcDisplay*& cl )
{ return is >> (void *&) cl; }
inline opstream& operator << ( opstream& os, TCalcDisplay& cl )
{ return os << (TStreamable&) cl; }
inline opstream& operator << ( opstream& os, TCalcDisplay* cl )
{ return os << (TStreamable *) cl; }
/**
** Basic calculator
**/
class TCalculator : public TDialog
{
public:
TCalculator();
TCalculator( StreamableInit ) :
TDialog(streamableInit), TWindowInit(&TCalculator::initFrame) { };
private:
virtual const char *streamableName() const
{ return name; }
//protected:
// virtual void write( opstream& );
// virtual void *read( ipstream& );
public:
static const char * const name;
static TStreamable *build();
};
inline ipstream& operator >> ( ipstream& is, TCalculator& cl )
{ return is >> (TStreamable&) cl; }
inline ipstream& operator >> ( ipstream& is, TCalculator*& cl )
{ return is >> (void *&) cl; }
inline opstream& operator << ( opstream& os, TCalculator& cl )
{ return os << (TStreamable&) cl; }
inline opstream& operator << ( opstream& os, TCalculator* cl )
{ return os << (TStreamable *) cl; }
#endif // __CALC_H
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