IcelandicCalendar Class Reference

The Icelandic calendar includes years, seasons (summer/winter), months (1..6 per season plus unaccounted days), weeks (1..52/53) and days (7-day week) This implementation follows CC. More...

#include <IcelandicCalendar.hpp>

Public Member Functions
	IcelandicCalendar (double jd)
virtual void	retranslate () Q_DECL_OVERRIDE
	Translate e.g. stringlists of part names.
virtual void	setJD (double JD) Q_DECL_OVERRIDE
	Set a calendar date from the Julian day number.
virtual void	setDate (QVector< int > parts) Q_DECL_OVERRIDE
	set date from a vector of calendar date elements sorted from the largest to the smallest. More...
virtual QStringList	getDateStrings () const Q_DECL_OVERRIDE
	get a stringlist of calendar date elements sorted from the largest to the smallest. More...
virtual QString	getFormattedDateString () const Q_DECL_OVERRIDE
	get a formatted complete string for a date
Public Member Functions inherited from Calendar
	Calendar (double jd)
virtual double	getJD () const
	Get Julian day number from a calendar date.
virtual QVector< int >	getDate () const
	get a vector of calendar date elements sorted from the largest to the smallest. More...
int	rdCorrSum (QVector< int >factors, int corr)

Static Public Member Functions
static bool	isLeap (int iyear)
	returns true for leap years (those with 53 weeks)
static int	fixedFromIcelandic (QVector< int > icelandic)
	RD from {year, season, week[1...27], weekday[0...6]}.
static QVector< int >	icelandicFromFixed (int rd)
	return year-season-week-day for RD date N.B. More...
static QPair< int, int >	icelandicMonth (QVector< int >iDate)
	return month number in the season. More...
static QString	icelandicMonthName (int i)
	Retrieve Icelandic month name. Numbers 1..6 for summer months, 7..12 for winter months.
Static Public Member Functions inherited from Calendar
static double	momentFromJD (double jd, bool respectUTCoffset=true)
	Interfacing function from Reingold/Dershowitz: Calendrical Calculations Returns a "moment" in RD that represents JD. More...
static int	fixedFromMoment (double rd)
static double	timeFromMoment (double rd)
static int	fixedFromJD (double jd, bool respectUTCoffset=true)
	Interfacing function from Reingold/Dershowitz: Calendrical Calculations Returns a fixed date in RD that represents noon of JD. More...
static double	momentFromMJD (double mjd)
static double	jdFromMoment (double rd, bool respectUTCoffset=true)
	interfacing function from Reingold/Dershowitz: Calendrical Calculations Returns a JD from an RD "moment" (including fractions of day) Stellarium extension: optionally includes local time zone offset. More...
static double	jdFromFixed (double rd, bool respectUTCoffset=true)
	interfacing function from Reingold/Dershowitz: Calendrical Calculations Returns a JD from an RD "moment" (including fractions of day) Stellarium extension: optionally includes local time zone offset. More...
static double	mjdFromFixed (double rd)
static int	dayOfWeekFromFixed (int rd)
	weekday from RD date. CC.UE(1.60).
static int	kdayOnOrBefore (const Calendar::Day k, const int rd)
	the R.D. of the nearest weekday k on or before rd
static int	kdayOnOrAfter (const Calendar::Day k, const int rd)
	the R.D. of the nearest weekday k on or after rd
static int	kdayNearest (const Calendar::Day k, const int rd)
	the R.D. of the nearest weekday k around rd
static int	kdayBefore (const Calendar::Day k, const int rd)
	the R.D. of the nearest weekday k before rd
static int	kdayAfter (const Calendar::Day k, const int rd)
	the R.D. of the nearest weekday k after rd
static double	modInterval (double x, double a, double b)
	Interval modulus, CC.UE 1.24. More...
static int	modInterval (int x, int a, int b)
	Interval modulus, CC.UE 1.24: This EXCLUDES the upper limit! Use StelUtils::amod(x, b) for CC's (x)mod[1..b].
static int	rdCorrSum (QVector< int >parts, QVector< int >factors, int corr)
	Reingold-Dershowitz CC.UE 1.48.
static QVector< int >	toRadix (int num, QVector< int >radix)
	Split integer to mixed-radix vector. Reingold-Dershowitz CC.UE 1.42.

Static Public Attributes
static const int	icelandicEpoch
Static Public Attributes inherited from Calendar
static constexpr const double	J2000 =2451545.0
static constexpr const double	jdEpoch =-1721424.5
static constexpr const double	mjdEpoch =678576.0
static constexpr const int	bogus =-1000000

Static Protected Member Functions
static int	icelandicSummer (int iyear)
	RD of April 19, AD1 (Gregorian). More...
static int	icelandicWinter (int iyear)

Static Protected Attributes
static QMap< int, QString >	weekDayNames
static QMap< int, QString >	monthNames

Additional Inherited Members
Public Types inherited from Calendar
enum	Day {   sunday = 0, monday, tuesday, wednesday,   thursday, friday, saturday }
	enum from CC.UE-ch1.12.
enum	Season { spring = 0, summer = 90, autumn = 180, winter = 270 }
Signals inherited from Calendar
void	partsChanged (QVector< int > parts)
void	jdChanged (double jd)
Protected Attributes inherited from Calendar
double	JD
QVector< int >	parts
	date expressed as JD(UT), including day fraction (ready to interact with the main application)

Detailed Description

It provides proper dates after the Gregorian switchover of A.D. 1700.

Member Function Documentation

getDateStrings()

virtual QStringList IcelandicCalendar::getDateStrings ( ) const

virtual

Year, Season, Month, MonthName, Week, Day, DayName

Implements Calendar.

icelandicFromFixed()

static QVector<int> IcelandicCalendar::icelandicFromFixed ( int  rd )

static

This adds month over the definition given by CC

icelandicMonth()

static QPair<int,int> IcelandicCalendar::icelandicMonth ( QVector< int >  iDate )

static

The first number of the pair is the month number, the second is an index to retrieve the name with icelandicMonthName(int)

icelandicSummer()

static int IcelandicCalendar::icelandicSummer ( int  iyear )

staticprotected

find RD of begin of summer for Icelandic (Gregorian) year.

setDate()

virtual void IcelandicCalendar::setDate ( QVector< int >  parts )

virtual

Year-Season[90=summer/270=winter]-week[1..27]-Day[1...31]

Implements Calendar.