/*
    $Id: kcalc.h,v 1.20 2000/02/14 07:38:33 charles Exp $

    KCalc, a scientific calculator for the X window system using the
    Qt widget libraries, available at no cost at http://www.troll.no
   
    Copyright (C) 1996 Bernd Johannes Wuebben
                       wuebben@math.cornell.edu
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef QTCALC_H
#define QTCALC_H

class QLabel;
class QListBox;
class QTimer;
class QPushButton;
class QRadioButton;
class QWidget;

class ConfigureDialog;
class DLabel;

#include <kdialog.h>
#include "stats.h"


#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif

// IMPORTANT this has to come after ../config.h
#include "kcalctype.h"

#define STACK_SIZE	100
#define TEMP_STACK_SIZE 1000 // the number of numbers kept in the temp stack 
                             // which are accessible with the up and down arrow
                            // key

#define PRECEDENCE_INCR	20

#define FUNC_NULL	0
#define FUNC_OR		1
#define FUNC_XOR	2
#define FUNC_AND	3
#define FUNC_LSH	4
#define FUNC_RSH	5
#define FUNC_ADD	6
#define FUNC_SUBTRACT	7
#define FUNC_MULTIPLY	8
#define FUNC_DIVIDE	9
#define FUNC_MOD	10
#define FUNC_POWER	11
#define FUNC_PWR_ROOT	12
#define FUNC_INTDIV	13

#define		DEC_SIZE	19
#define		BOH_SIZE	16
#define		DSP_SIZE	50 //25

#define		DEG2RAD(x)	(((2L*pi)/360L)*x)
#define		GRA2RAD(x)	((pi/200L)*x)
#define		RAD2DEG(x)	((360L/(2L*pi))*x)
#define		RAD2GRA(x)	((200L/pi)*x)
#define		POS_ZERO	 1e-19L	 /* What we consider zero is   */
#define		NEG_ZERO	-1e-19L	 /* anything between these two */


typedef	CALCAMNT  (*Arith)(CALCAMNT, CALCAMNT); 
typedef	CALCAMNT  (*Prcnt)(CALCAMNT, CALCAMNT, CALCAMNT); 
typedef	CALCAMNT  (*Trig)(CALCAMNT); 

typedef enum _last_input_type {
  DIGIT = 1, OPERATION = 2, RECALL = 3, PASTE = 4
} last_input_type;

typedef enum   _num_base	{ 
	NB_BINARY = 2, NB_OCTAL = 8, NB_DECIMAL = 10, NB_HEX = 16 
} num_base;

typedef enum   _angle_type	{ 
	ANG_DEGREE = 0, ANG_RADIAN = 1, ANG_GRADIENT = 2
} angle_type;

typedef enum   _item_type	{ 
	ITEM_FUNCTION, ITEM_AMOUNT 
} item_type;

typedef struct   _func_data	{ 
	int		item_function;
	int		item_precedence;
} func_data;

typedef	union  _item_data 	{	/* The item data	 */
	CALCAMNT	item_amount;	/*	an amount	 */
	func_data	item_func_data;	/*	or a function	 */
} item_data;				/* called item_data      */

typedef struct _item_contents	{	/* The item contents	 */
	item_type	s_item_type;	/* 	a type flag      */
	item_data	s_item_data; 	/*      and data	 */
} item_contents;

typedef struct stack_item	*stack_ptr;

typedef struct stack_item {

	/* Contents of an item on the input stack */

	stack_ptr	prior_item;		/* Pointer to prior item */
	stack_ptr	prior_type;		/* Pointer to prior type */
	item_contents	item_value;		/* The value of the item */

} stack_item;					/* all called stack_item */


CALCAMNT ExecOr(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecXor(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecAnd(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecLsh(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecRsh(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecAdd(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecSubtract(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecMultiply(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecDivide(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecMod(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecPower(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecPwrRoot(CALCAMNT left_op, CALCAMNT right_op);
CALCAMNT ExecIntDiv(CALCAMNT left_op, CALCAMNT right_op);

CALCAMNT ExecAddSubP(CALCAMNT left_op, CALCAMNT right_op, CALCAMNT result);
CALCAMNT ExecMultiplyP(CALCAMNT left_op, CALCAMNT right_op, CALCAMNT result);
CALCAMNT ExecDivideP(CALCAMNT left_op, CALCAMNT right_op, CALCAMNT result);
CALCAMNT ExecPowerP(CALCAMNT left_op, CALCAMNT right_op, CALCAMNT result);
CALCAMNT ExecPwrRootP(CALCAMNT left_op, CALCAMNT right_op, CALCAMNT result);


int 		UpdateStack(int run_precedence);
CALCAMNT 	ExecFunction(CALCAMNT left_op, int function, CALCAMNT right_op);
int 		cvb(char *out_str, long amount, int max_out);

void 		PrintStack(void);
void 		InitStack(void);
void 		PushStack(item_contents *add_item);
item_contents 	*PopStack(void);
item_contents 	*TopOfStack(void);
item_contents 	*TopTypeStack(item_type rqstd_type);

 
#define		DISPLAY_AMOUNT	display_data.s_item_data.item_amount



typedef struct _DefStruct{
  QColor forecolor;
  QColor backcolor;
  int precision;
  int fixedprecision;
  int style;
  bool fixed;
  bool beep;
  QFont   font;
}DefStruct;


class QtCalculator : public KDialog
{
    Q_OBJECT

public:

    QtCalculator( QWidget *parent=0, const char *name=0 );
    ~QtCalculator( void );

    void updateGeometry( void );

    void keyPressEvent( QKeyEvent *e );    
    void keyReleaseEvent( QKeyEvent *e );
    void closeEvent( QCloseEvent *e );
    void writeSettings();
    void readSettings();
    void set_precision();
    void set_display_font();
    void set_style();
    void temp_stack_next();
    void temp_stack_prev();
    void ComputeMean();
    void ComputeSin();
    void ComputeStd();
    void ComputeCos();
    void ComputeMedean();
    void ComputeTan();

public slots:

    void helpclicked();
    void configurationChanged( const DefStruct &state ); 
    void set_colors();
    void display_selected();
    void invertColors();
    void quitCalc();
    void selection_timed_out();
    void clear_buttons();
    void clear_status_label();
    void setStatusLabel(const QString&);
    void EnterDigit(int data);
    void SubtractDigit();
    void EnterDecimal();
    void EnterStackFunction(int data);
    void EnterNegate();
    void EnterOpenParen();
    void EnterCloseParen();
    void EnterRecip();
    void EnterInt();
    void EnterFactorial();
    void EnterSquare();
    void EnterNotCmp();
    void EnterHyp();
    void EnterPercent();
    void EnterLogr();
    void EnterLogn();
    void SetDeg();
    void SetGra();
    void SetRad();
    void SetHex();
    void SetOct();
    void SetBin();
    void SetDec();
    void Deg_Selected();
    void Rad_Selected();
    void Gra_Selected();
    void Hex_Selected();
    void Dec_Selected();
    void Oct_Selected();
    void Bin_Selected();
    void SetInverse();
    void EnterEqual();
    void Clear();
    void ClearAll();
    void RefreshCalculator(void);
    void InitializeCalculator(void);
    void UpdateDisplay();
    void ExecSin();
    void ExecCos();
    void ExecTan();
    void button0();
    void button1();
    void button2();
    void button3();
    void button4();
    void button5();
    void button6();
    void button7();
    void button8();
    void button9();
    void buttonA();
    void buttonB();
    void buttonC();
    void buttonD();
    void buttonE();
    void buttonF();
    void base_selected(int number);
    void angle_selected(int number);
    void Or();
    void And();
    void Shift();
    void Plus();
    void Minus();
    void Multiply();
    void Divide();
    void Mod();
    void Power();
    void EE();
    void MR();
    void Mplusminus();
    void MC();
    void exit();
    void EEtoggled(bool myboolean);
    void pbinvtoggled(bool myboolean);
    void pbMRtoggled(bool myboolean);
    void pbAtoggled(bool myboolean);	
    void pbSintoggled(bool myboolean);
    void pbplusminustoggled(bool myboolean);
    void pbMplusminustoggled(bool myboolean);
    void pbBtoggled(bool myboolean);
    void pbCostoggled(bool myboolean);
    void pbrecitoggled(bool myboolean);
    void pbCtoggled(bool myboolean);
    void pbTantoggled(bool myboolean);
    void pbfactorialtoggled(bool myboolean);
    void pbDtoggled(bool myboolean);
    void pblogtoggled(bool myboolean);
    void pbsquaretoggled(bool myboolean);
    void pbEtoggled(bool myboolean);
    void pblntoggled(bool myboolean);
    void pbpowertoggled(bool myboolean);
    void pbFtoggled(bool myboolean); 
    void pbMCtoggled(bool myboolean);
    void pbCleartoggled(bool myboolean);  
    void pbACtoggled(bool myboolean);
    void pb7toggled(bool myboolean);
    void pb8toggled(bool myboolean);
    void pb9toggled(bool myboolean);
    void pbparenopentoggled(bool myboolean);
    void pbparenclosetoggled(bool myboolean);
    void pbandtoggled(bool myboolean);
    void pb4toggled(bool myboolean);
    void pb5toggled(bool myboolean);
    void pb6toggled(bool myboolean);
    void pbXtoggled(bool myboolean);
    void pbdivisiontoggled(bool myboolean);
    void pbortoggled(bool myboolean);
    void pb1toggled(bool myboolean);
    void pb2toggled(bool myboolean);
    void pb3toggled(bool myboolean);    
    void pbplustoggled(bool myboolean);
    void pbminustoggled(bool myboolean);
    void pbshifttoggled(bool myboolean);
    void pbperiodtoggled(bool myboolean);
    void pb0toggled(bool myboolean);    
    void pbequaltoggled(bool myboolean);
    void pbpercenttoggled(bool myboolean);    
    void pbnegatetoggled(bool myboolean);    
    void pbmodtoggled(bool myboolean);    
    void pbhyptoggled(bool myboolean);
    void configclicked();



public:

     DefStruct kcalcdefaults;
 
private:
    QWidget *mSmallPage;
    QWidget *mLargePage;
    
    QPushButton *mConfigButton;
    QPushButton *mHelpButton;
    
    QTimer* selection_timer;
    QLabel* statusINVLabel;
    QLabel* statusHYPLabel;
    QLabel* statusERRORLabel;
    DLabel*		calc_display;
    QRadioButton*	anglebutton[3];
    QRadioButton*	basebutton[4];
    QPushButton*        pbhyp;    
    QPushButton* 	pbEE;
    QPushButton* 	pbinv;
    QPushButton* 	pbMR;
    QPushButton* 	pbA;
    QPushButton* 	pbSin;
    QPushButton* 	pbplusminus;
    QPushButton* 	pbMplusminus;
    QPushButton* 	pbB;
    QPushButton* 	pbCos;
    QPushButton* 	pbreci;
    QPushButton* 	pbC;
    QPushButton* 	pbTan;
    QPushButton* 	pbfactorial;
    QPushButton* 	pbD;
    QPushButton* 	pblog;
    QPushButton* 	pbsquare;
    QPushButton* 	pbE;
    QPushButton* 	pbln;
    QPushButton* 	pbpower;
    QPushButton* 	pbF; 
    QPushButton* 	pbMC;
    QPushButton* 	pbClear;  
    QPushButton* 	pbAC;
    QPushButton* 	pb7;
    QPushButton* 	pb8;
    QPushButton* 	pb9;
    QPushButton* 	pbparenopen;
    QPushButton* 	pbparenclose;
    QPushButton* 	pband;
    QPushButton* 	pb4;
    QPushButton* 	pb5;
    QPushButton* 	pb6;
    QPushButton* 	pbX;
    QPushButton* 	pbdivision;
    QPushButton* 	pbor;
    QPushButton* 	pb1;
    QPushButton* 	pb2;
    QPushButton* 	pb3;    
    QPushButton* 	pbplus;
    QPushButton* 	pbminus;
    QPushButton* 	pbshift;
    QPushButton* 	pbperiod;
    QPushButton* 	pb0;    
    QPushButton* 	pbequal;
    QPushButton* 	pbpercent;    
    QPushButton* 	pbnegate;    
    QPushButton* 	pbmod;    
    
    bool		key_pressed;
    int                 mInternalSpacing;
    KStats		stats;
    QListBox            *paper;
    QTimer		*status_timer;
    ConfigureDialog     *mConfigureDialog;

};

#endif  //QTCLAC_H
