
/***************************************************************************
                          timespinbox.cpp  -  description
                             -------------------
    begin                : Sun Mar 31 2002
    copyright            : (C) 2002 by Jason Harris
    email                : kstars@30doradus.org
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "timespinbox.h"

#include <cstdlib>
#include <cmath>

#include <QFontMetrics>
#include <QLineEdit>

#include <QDebug>
#include <KLocalizedString>

#define SECS_PER_DAY 86400.
#define SIDEREAL_YEAR 31558149.77
#define TROPICAL_YEAR 31556925.19

//Time steps:
//0-9:   0 sec, 0.1, 0.25, 0.5, 1, 2, 5, 10, 20, 30 sec
//10-14: 1 minute, 2, 5, 10, 15, 30 min
//15-19: 1 hour, 2, 4, 6, 12 hours
//20-23: 1 day, 2, 3, 5 days
//24-26: 1 week, 2, 3 weeks
//27-32: 1 month, 2, 3, 4, 6, 9 months
//33-41: 1 year, 2, 3, 4, 5, 10, 25, 50, 100 years

TimeSpinBox::TimeSpinBox( QWidget *parent, bool _daysonly )
        : QSpinBox ( parent )
{
    setDaysOnly( _daysonly );

    setMinimum( -41 );
    setMaximum( 41 );
    setSingleStep( 1 );

    setButtonSymbols( QSpinBox::PlusMinus );
    lineEdit()->setReadOnly( true );
    setValue( 4 ); //1 second (real time)

    //Set width:
    QFontMetrics fm( font() );
    int extra = width() - lineEdit()->width();
    uint wmax = 0;
    for ( int i=0; i < maximum(); ++i ) {
        uint w = fm.width( '-' + TimeString[i] );
        if (  w > wmax ) wmax = w;
    }
    setFixedWidth( wmax + extra );

    connect( this, SIGNAL( valueChanged( int ) ), this, SLOT( reportChange() ) );
    //	updateDisplay();
}

void TimeSpinBox::setDaysOnly( bool daysonly ) {
    DaysOnly = daysonly;

    int i=0; //index for TimeScale values
    TimeScale[0] = 0.0;          // 0.0 sec
    if ( ! daysOnly() ) {
        TimeScale[1] = 0.1;          // 0.1 sec
        TimeScale[2] = 0.25;         // 0.25 sec
        TimeScale[3] = 0.5;          // 0.5 sec
        TimeScale[4] = 1.0;          // 1 sec (real-time)
        TimeScale[5] = 2.0;          // 2 sec
        TimeScale[6] = 5.0;          // 5 sec
        TimeScale[7] = 10.0;         // 10 sec
        TimeScale[8] = 20.0;         // 20 sec
        TimeScale[9] = 30.0;         // 30 sec
        TimeScale[10] = 60.0;        // 1 min
        TimeScale[11] = 120.0;       // 2 min
        TimeScale[12] = 300.0;       // 5 min
        TimeScale[13] = 600.0;       // 10 min
        TimeScale[14] = 900.0;       // 15 min
        TimeScale[15] = 1800.0;      // 30 min
        TimeScale[16] = 3600.0;      // 1 hr
        TimeScale[17] = 7200.0;      // 2 hr
        TimeScale[18] = 10800.0;     // 3 hr
        TimeScale[19] = 21600.0;     // 6 hr
        TimeScale[20] = 43200.0;     // 12 hr
        i = 20;
    }
    TimeScale[i+1] = 86164.1;     // 23 hr 56 min
    TimeScale[i+2] = SECS_PER_DAY;     // 1 day
    TimeScale[i+3] = 2.*SECS_PER_DAY;  // 2 days
    TimeScale[i+4] = 3.*SECS_PER_DAY;  // 3 days
    TimeScale[i+5] = 5.*SECS_PER_DAY;  // 5 days
    TimeScale[i+6] = 7.*SECS_PER_DAY;  // 1 week
    TimeScale[i+7] = 14.*SECS_PER_DAY; //2 weeks
    TimeScale[i+8] = 21.*SECS_PER_DAY; //3 weeks
    //Months aren't a simple measurement of time; I'll just use fractions of a year
    TimeScale[i+9] = SIDEREAL_YEAR/12.0; // 1 month
    TimeScale[i+10] = SIDEREAL_YEAR/6.0;  // 2 months
    TimeScale[i+11] = 0.25*SIDEREAL_YEAR; // 3 months
    TimeScale[i+12] = SIDEREAL_YEAR/3.0;  // 4 months
    TimeScale[i+13] = 0.5*SIDEREAL_YEAR;  // 6 months
    TimeScale[i+14] = 0.75*SIDEREAL_YEAR; // 9 months
    TimeScale[i+15] = SIDEREAL_YEAR;       // 1 year
    TimeScale[i+16] = 2.0*SIDEREAL_YEAR;   // 2 years
    TimeScale[i+17] = 3.0*SIDEREAL_YEAR;   // 3 years
    TimeScale[i+18] = 5.0*SIDEREAL_YEAR;   // 5 years
    TimeScale[i+19] = 10.0*SIDEREAL_YEAR;  // 10 years
    TimeScale[i+20] = 25.0*SIDEREAL_YEAR;  // 25 years
    TimeScale[i+21] = 50.0*SIDEREAL_YEAR;  // 50 years
    TimeScale[i+22] = 100.0*SIDEREAL_YEAR; // 100 years

    TimeString.clear();
    if ( ! daysOnly() ) {
        TimeString.append( "0 " + xi18nc( "seconds", "secs" ));
        TimeString.append( "0.1 " + xi18nc( "seconds", "secs" ));
        TimeString.append( "0.25 " + xi18nc( "seconds", "secs" ));
        TimeString.append( "0.5 " + xi18nc( "seconds", "secs" ));
        TimeString.append( "1 " + xi18nc( "second", "sec" ));
        TimeString.append( "2 " + xi18nc( "seconds", "secs" ));
        TimeString.append( "5 " + xi18nc( "seconds", "secs" ));
        TimeString.append( "10 " + xi18nc( "seconds", "secs" ));
        TimeString.append( "20 " + xi18nc( "seconds", "secs" ));
        TimeString.append( "30 " + xi18nc( "seconds", "secs" ));
        TimeString.append( "1 " + xi18nc( "minute", "min" ));
        TimeString.append( "2 " + xi18nc( "minutes", "mins" ));
        TimeString.append( "5 " + xi18nc( "minutes", "mins" ));
        TimeString.append( "10 " + xi18nc( "minutes", "mins" ));
        TimeString.append( "15 " + xi18nc( "minutes", "mins" ));
        TimeString.append( "30 " + xi18nc( "minutes", "mins" ));
        TimeString.append( "1 " + xi18n( "hour" ));
        TimeString.append( "2 " + xi18nc( "hours", "hrs" ));
        TimeString.append( "3 " + xi18nc( "hours", "hrs" ));
        TimeString.append( "6 " + xi18nc( "hours", "hrs" ));
        TimeString.append( "12 " + xi18nc( "hours", "hrs" ));
    } else {
        TimeString.append( "0 " + xi18n( "days" ));
    }
    TimeString.append( "1 " + xi18nc( "sidereal day", "sid day" ));
    TimeString.append( "1 " + xi18n( "day" ));
    TimeString.append( "2 " + xi18n( "days" ));
    TimeString.append( "3 " + xi18n( "days" ));
    TimeString.append( "5 " + xi18n( "days" ));
    TimeString.append( "1 " + xi18n( "week" ));
    TimeString.append( "2 " + xi18nc( "weeks", "wks" ));
    TimeString.append( "3 " + xi18nc( "weeks", "wks" ));
    TimeString.append( "1 " + xi18n( "month" ));
    TimeString.append( "2 " + xi18nc( "months", "mths" ));
    TimeString.append( "3 " + xi18nc( "months", "mths" ));
    TimeString.append( "4 " + xi18nc( "months", "mths" ));
    TimeString.append( "6 " + xi18nc( "months", "mths" ));
    TimeString.append( "9 " + xi18nc( "months", "mths" ));
    TimeString.append( "1 " + xi18n( "year" ));
    TimeString.append( "2 " + xi18nc( "years", "yrs" ));
    TimeString.append( "3 " + xi18nc( "years", "yrs" ));
    TimeString.append( "5 " + xi18nc( "years", "yrs" ));
    TimeString.append( "10 " + xi18nc( "years", "yrs" ));
    TimeString.append( "25 " + xi18nc( "years", "yrs" ));
    TimeString.append( "50 " + xi18nc( "years", "yrs" ));
    TimeString.append( "100 " + xi18nc( "years", "yrs" ));

    if ( ! daysOnly() ) {
        setMinimum( -41 );
        setMaximum(  41 );
    } else {
        setMinimum( -21 );
        setMaximum(  21 );
    }
}

int TimeSpinBox::valueFromText( const QString &text ) const {
    for ( int i=0; i<TimeString.size(); i++ ) {
        if ( text == TimeString[i] ) { return i; }
        if ( text.mid(1,text.length()) == TimeString[i] ) { return -1*i; }
    }

    return 0;
}

QString TimeSpinBox::textFromValue( int value ) const {
    QString neg("-"), result;
    int posval( abs( value ) );
    if ( posval > TimeString.size() - 1 ) posval = 4;

    result = TimeString[ posval ];

if ( value<0 ) { result = '-' + result; }
    return result;
}

void TimeSpinBox::changeScale( float x ) {
    //Pick the closest value
    int imin = 0;
    float dx, dxlast(10000000000.0), dxmin(10000000000.0);
    for ( unsigned int i=0; i<42; ++i ) {
        dx = fabs( TimeScale[i] - fabs(x) );
        if ( dx < dxmin ) { imin = i; dxmin = dx; }
        if ( dx > dxlast ) break; //we have passed the minimum dx
        dxlast = dx;
    }

    if ( x < 0.0 ) imin *= -1;
    setValue( imin );
}

float TimeSpinBox::timeScale( void ) const {
    return value() > 0 ? TimeScale[ value() ] : -1.*TimeScale[ abs(value()) ];
}

void TimeSpinBox::reportChange() {
    qDebug() << xi18n( "Reporting new timestep value: " ) << timeScale();
    emit scaleChanged( timeScale() );
}


