calculator.h

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#ifndef __CALCULATOR_H__
#define __CALCULATOR_H__
 
#include <stdint.h>
#include <chitralekha.h>
#include <widgets\base.h>
#include <widgets\window.h>
 
#define CALC_OPERATOR_DIVIDE 1
#define CALC_OPERATOR_MULT 2
#define CALC_OPERATOR_ADD 3
#define CALC_OPERATOR_SUB 4
#define CALC_OPERATOR_MOD 5
 
 
typedef struct _display_widget_ {
    ChWidget wid;
    char* inputnum;
    uint16_t inputidx;
    char* outputnum;
    uint8_t operator_;
    char* historyBuf;
    uint16_t historyIdx;
    int num1;
    int num2;
    bool output;
}CalculatorDisplay;
 
/*
* CalculatorGetMainDisplay -- returns the main display
*/
extern CalculatorDisplay* CalculatorGetMainDisplay();
 
/*
* CalcUpdateDisplay -- update the newly modified display
* @param disp -- Pointer to calculator display
*/
extern void CalcUpdateDisplay(CalculatorDisplay* disp);
 
/* CalcAddDigit -- adds a digit to the calculator
* processor, only one digit
* @param disp -- Calculator display processor
* @param number -- number with one digit
*/
extern void CalcAddDigit(CalculatorDisplay* disp, int number);
 
/*
* CalcRemoveDigit -- removes a digit from input buffer
* @param disp -- Calculator display
*/
extern void CalcRemoveDigit(CalculatorDisplay* disp);
 
/*
* CalcAllClear -- clear all digits
* @param disp -- Pointer to calculator display
* processor
*/
extern void CalcAllClear(CalculatorDisplay* disp);
 
/*
* CalculatorProcess -- process calculator calculations
* @param calc -- Pointer to calculator display
*/
extern void CalculatorProcess(CalculatorDisplay* calc);
 
/*
* CalcAddToHistory -- add recent calculations to history
* @param disp -- Pointer to calculator display
* @param num -- numbers to add
* @param operator_ -- operator to add
*/
extern void CalcAddToHistory(CalculatorDisplay* disp, char* num, uint8_t operator_);
 
/*
* CalcClearHistory -- clears recent digits history
* @param disp -- Pointer to calculator display
*/
extern void CalcClearHistory(CalculatorDisplay* disp);
 
/*
* CalcClearOutput -- clear all output
* @param disp -- Pointer to calculator display
*/
extern void CalcClearOutput(CalculatorDisplay* disp);
 
void SevenAction(ChWidget* wid, ChWindow* win);
void SixAction(ChWidget* wid, ChWindow* win);
void FiveAction(ChWidget* wid, ChWindow* win);
void FourAction(ChWidget* wid, ChWindow* win);
void ThreeAction(ChWidget* wid, ChWindow* win);
void TwoAction(ChWidget* wid, ChWindow* win);
void OneAction(ChWidget* wid, ChWindow* win);
void EightAction(ChWidget* wid, ChWindow* win);
void NineAction(ChWidget* wid, ChWindow* win);
void ZeroAction(ChWidget* wid, ChWindow* win);
void BackAction(ChWidget* wid, ChWindow* win);
void AllClearAction(ChWidget* wid, ChWindow* win);
void AddAction(ChWidget* wid, ChWindow* win);
void DivideAction(ChWidget* wid, ChWindow* win);
void MultAction(ChWidget* wid, ChWindow* win);
void SubAction(ChWidget* wid, ChWindow* win);
void ModAction(ChWidget* wid, ChWindow* win);
void EqualAction(ChWidget* wid, ChWindow* win);
void HandleKeyEvents(int keycode);
 
#endif