QwtDate Class Reference

A collection of methods around date/time values. More...

#include <qwt_date.h>

Public Types
enum	Week0Type { FirstThursday , FirstDay }
	How to identify the first week of year differs between countries . More...
enum	IntervalType {   Millisecond , Second , Minute , Hour ,   Day , Week , Month , Year }
	Classification of a time interval. More...
enum	{ JulianDayForEpoch = 2440588 }

Static Public Member Functions
static QDate	minDate ()
	Minimum for the supported date range.
static QDate	maxDate ()
	Maximum for the supported date range.
static QDateTime	toDateTime (double value, Qt::TimeSpec=Qt::UTC)
	Translate from double to QDateTime.
static double	toDouble (const QDateTime &)
	Translate from QDateTime to double.
static QDateTime	ceil (const QDateTime &, IntervalType)
	Ceil a datetime according the interval type.
static QDateTime	floor (const QDateTime &, IntervalType)
	Floor a datetime according the interval type.
static QDate	dateOfWeek0 (int year, Week0Type)
	Date of the first day of the first week for a year.
static int	weekNumber (const QDate &, Week0Type)
	Find the week number of a date.
static int	utcOffset (const QDateTime &)
	Offset in seconds from Coordinated Universal Time.
static QString	toString (const QDateTime &, const QString &format, Week0Type)
	Translate a datetime into a string.

Detailed Description

A collection of methods around date/time values.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
JulianDayForEpoch	The Julian day of "The Epoch"

IntervalType

enum QwtDate::IntervalType

Classification of a time interval.

Enumerator
Millisecond	Millisecond
Second	Second
Minute	Minute
Hour	Hour
Day	Day
Week	Week
Month	Month
Year	Year

Week0Type

enum QwtDate::Week0Type

How to identify the first week of year differs between countries .

Enumerator
FirstThursday	According to ISO 8601 the first week of a year is defined as "the week with the year's first Thursday in it". FirstThursday corresponds to the numbering that is implemented in QDate::weekNumber().
FirstDay	"The week with January 1 in it." In the U.S. this definition is more common than FirstThursday.

Member Function Documentation

ceil()

QDateTime QwtDate::ceil ( const QDateTime &  dateTime, IntervalType  intervalType  )

static

Ceil a datetime according the interval type.

dateOfWeek0()

QDate QwtDate::dateOfWeek0 ( int  year, Week0Type  type  )

static

Date of the first day of the first week for a year.

floor()

QDateTime QwtDate::floor ( const QDateTime &  dateTime, IntervalType  intervalType  )

static

Floor a datetime according the interval type.

maxDate()

QDate QwtDate::maxDate ( )

static

Maximum for the supported date range.

minDate()

QDate QwtDate::minDate ( )

static

Minimum for the supported date range.

toDateTime()

QDateTime QwtDate::toDateTime ( double  value, Qt::TimeSpec  timeSpec = Qt::UTC  )

static

Translate from double to QDateTime.

toDouble()

double QwtDate::toDouble ( const QDateTime &  dateTime )

static

Translate from QDateTime to double.

toString()

QString QwtDate::toString ( const QDateTime &  dateTime, const QString &  format, Week0Type  week0Type  )

static

Translate a datetime into a string.

utcOffset()

int QwtDate::utcOffset ( const QDateTime &  dateTime )

static

Offset in seconds from Coordinated Universal Time.

weekNumber()

int QwtDate::weekNumber ( const QDate &  date, Week0Type  type  )

static

Find the week number of a date.

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The documentation for this class was generated from the following files:

• /home/runner/work/QWT/QWT/src/plot/qwt_date.h
• /home/runner/work/QWT/QWT/src/plot/qwt_date.cpp