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/**********************************************************************
** Copyright (C) 2000 Trolltech AS. All rights reserved.
**
** This file is part of Qtopia Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef CALCULATORIMPL_H
#define CALCULATORIMPL_H
#include <qlcdnumber.h>
#include "calculator.h"
#include <qpushbutton.h>
#include <qbuttongroup.h>
#include <qvaluestack.h>
// mode x functions
enum Operation {
oNop,
oOpenBrace,
oCloseBrace,
oSum,
oPoint,
oAdd,
oSub,
oDiv,
oMult,
// mode 0 functions
oSin,
oCos,
oTan,
oDivX,
oPercent,
oXsquared,
oRoot,
oLog,
oLn,
oChSign
};
// states
#define sStart 0
#define sNewNumber 1
#define sError 2
struct Op
{
Op() { number = 0; operation = oNop; }
Op( double num, Operation op )
{ number = num; operation = op; }
double number;
Operation operation;
};
class QLabel;
class CalculatorImpl : public Calculator
{
Q_OBJECT
public:
CalculatorImpl( QWidget * parent = 0, const char * name = 0,
WFlags f = 0 );
static QString appName() { return QString::fromLatin1("calculator"); }
public slots:
void command_buttons(int);
void enterNumber(int i);
void std_buttons(int);
void std_funcs(int);
void do_convert(int);
void function_button(int);
protected:
virtual bool eventFilter( QObject *o, QEvent *e );
private:
void clear();
void reset_conv();
void processStack( int op );
QValueStack<Op> operationStack;
int state;
double acc, num, mem;
int numDecimals;
bool flPoint;
int numOpenBraces;
void execOp( Operation i );
double evalExpr( int op );
QLabel * memMark;
QString fake;
// useful values for conversion stuff
int current_mode, max_mode, conversion_mode_count, last_conversion;
// make adding new modes easier for ourselves
static const int pre_conv_modes_count = 1;
static const int post_conv_modes_count = 0;
// an array of pointers to the func buttons
static const int func_button_count = 12;
// this is an abomination
static const int changeable_func_button_count = 10;
QPushButton* func_buttons[func_button_count];
QButtonGroup bgr_function, bgr_digits, bgr_std, bgr_command;
QStringList faces, captions;
// an array of doubles holding the conversion ratios
double* entry_list;
double* preoffset_list;
double* postoffset_list;
QPixmap xtopowerofy;
QPixmap ythrootofx;
QPixmap oneoverx;
void display_pixmap_faces(void);
};
#endif
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