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RedHat 9 (Linux i386) - man page for qdate (redhat section 3qt)

QDate(3qt)									       QDate(3qt)

NAME
       QDate - Date functions

SYNOPSIS
       All the functions in this class are reentrant when Qt is built with thread support.</p>

       #include <qdatetime.h>

   Public Members
       QDate ()
       QDate ( int y, int m, int d )
       bool isNull () const
       bool isValid () const
       int year () const
       int month () const
       int day () const
       int dayOfWeek () const
       int dayOfYear () const
       int daysInMonth () const
       int daysInYear () const
       int weekNumber ( int * yearNumber = 0 ) const
       QString toString ( Qt::DateFormat f = Qt::TextDate ) const
       QString toString ( const QString & format ) const
       bool setYMD ( int y, int m, int d )
       QDate addDays ( int ndays ) const
       QDate addMonths ( int nmonths ) const
       QDate addYears ( int nyears ) const
       int daysTo ( const QDate & d ) const
       bool operator== ( const QDate & d ) const
       bool operator!= ( const QDate & d ) const
       bool operator< ( const QDate & d ) const
       bool operator<= ( const QDate & d ) const
       bool operator> ( const QDate & d ) const
       bool operator>= ( const QDate & d ) const

   Static Public Members
       QString monthName ( int month )	(obsolete)
       QString dayName ( int weekday )	(obsolete)
       QString shortMonthName ( int month )
       QString shortDayName ( int weekday )
       QString longMonthName ( int month )
       QString longDayName ( int weekday )
       QDate currentDate ()
       QDate currentDate ( Qt::TimeSpec ts )
       QDate fromString ( const QString & s, Qt::DateFormat f = Qt::TextDate )
       bool isValid ( int y, int m, int d )
       bool leapYear ( int y )

RELATED FUNCTION DOCUMENTATION
       QDataStream & operator<< ( QDataStream & s, const QDate & d )
       QDataStream & operator>> ( QDataStream & s, QDate & d )

DESCRIPTION
       The QDate class provides date functions.

       A QDate object contains a calendar date, i.e. year, month, and day numbers, in the modern
       Western (Gregorian) calendar. It can read the current date from the system clock. It
       provides functions for comparing dates and for manipulating dates, e.g. by adding a number
       of days or months or years.

       A QDate object is typically created either by giving the year, month and day numbers
       explicitly, or by using the static function currentDate(), which creates a QDate object
       containing the system clock's date. An explicit date can also be set using setYMD(). The
       fromString() function returns a QDate given a string and a date format which is used to
       interpret the date within the string.

       The year(), month(), and day() functions provide access to the year, month, and day
       numbers. Also, dayOfWeek() and dayOfYear() functions are provided. The same information is
       provided in textual format by the toString(), shortDayName(), longDayName(),
       shortMonthName() and longMonthName() functions.

       QDate provides a full set of operators to compare two QDate objects where smaller means
       earlier and larger means later.

       You can increment (or decrement) a date by a given number of days using addDays().
       Similarly you can use addMonths() and addYears(). The daysTo() function returns the number
       of days between two dates.

       The daysInMonth() and daysInYear() functions return how many days there are in this date's
       month and year, respectively. The leapYear() function indicates whether this date is in a
       leap year.

       Note that QDate should not be used for date calculations for dates prior to the
       introduction of the Gregorian calendar. This calendar was adopted by England from the
       14<sup><small>th</small></sup> September 1752 (hence this is the earliest valid QDate),
       and subsequently by most other Western countries, until 1923.

       The end of time is reached around the year 8000, by which time we expect Qt to be
       obsolete.

       See also QTime, QDateTime, QDateEdit, QDateTimeEdit, and Time and Date.

MEMBER FUNCTION DOCUMENTATION
QDate::QDate ()
       Constructs a null date. Null dates are invalid.

       See also isNull() and isValid().

QDate::QDate ( int y, int m, int d )
       Constructs a date with year y, month m and day d.

       y must be in the range 1752..8000, m must be in the range 1..12, and d must be in the
       range 1..31.

       Warning: If y is in the range 0..99, it is interpreted as 1900..1999.

       See also isValid().

QDate QDate::addDays ( int ndays ) const
       Returns a QDate object containing a date ndays later than the date of this object (or
       earlier if ndays is negative).

       See also addMonths(), addYears(), and daysTo().

QDate QDate::addMonths ( int nmonths ) const
       Returns a QDate object containing a date nmonths later than the date of this object (or
       earlier if nmonths is negative).

       See also addDays() and addYears().

QDate QDate::addYears ( int nyears ) const
       Returns a QDate object containing a date nyears later than the date of this object (or
       earlier if nyears is negative).

       See also addDays() and addMonths().

QDate QDate::currentDate ( Qt::TimeSpec ts ) [static]
       Returns the current date, as reported by the system clock, for the TimeSpec ts. The
       default TimeSpec is LocalTime.

       See also QTime::currentTime(), QDateTime::currentDateTime(), and Qt::TimeSpec.

       Example: dclock/dclock.cpp.

QDate QDate::currentDate () [static]
       This is an overloaded member function, provided for convenience. It behaves essentially
       like the above function.

       Returns the current date, as reported by the system clock.

       See also QTime::currentTime() and QDateTime::currentDateTime().

int QDate::day () const
       Returns the day of the month (1..31) of this date.

       See also year(), month(), and dayOfWeek().

       Example: dclock/dclock.cpp.

QString QDate::dayName ( int weekday ) [static]
       This function is obsolete. It is provided to keep old source working. We strongly advise
       against using it in new code.

       Use shortDayName() instead.

int QDate::dayOfWeek () const
       Returns the weekday (Monday=1..Sunday=7) for this date.

       See also day() and dayOfYear().

int QDate::dayOfYear () const
       Returns the day of the year (1..365) for this date.

       See also day() and dayOfWeek().

int QDate::daysInMonth () const
       Returns the number of days in the month (28..31) for this date.

       See also day() and daysInYear().

int QDate::daysInYear () const
       Returns the number of days in the year (365 or 366) for this date.

       See also day() and daysInMonth().

int QDate::daysTo ( const QDate & d ) const
       Returns the number of days from this date to d (which is negative if d is earlier than
       this date).

       Example:

	       QDate d1( 1995, 5, 17 );  // May 17th 1995
	       QDate d2( 1995, 5, 20 );  // May 20th 1995
	       d1.daysTo( d2 ); 	 // returns 3
	       d2.daysTo( d1 ); 	 // returns -3

       See also addDays().

QDate QDate::fromString ( const QString & s, Qt::DateFormat f = Qt::TextDate ) [static]
       Returns the QDate represented by the string s, using the format f, or an invalid date if
       the string cannot be parsed.

       Note for Qt::TextDate: It is recommended that you use the English short month names (e.g.
       "Jan"). Although localized month names can also be used, they depend on the user's locale
       settings.

       Warning: Qt::LocalDate cannot be used here.

bool QDate::isNull () const
       Returns TRUE if the date is null; otherwise returns FALSE. A null date is invalid.

       See also isValid().

bool QDate::isValid () const
       Returns TRUE if this date is valid; otherwise returns FALSE.

       See also isNull().

bool QDate::isValid ( int y, int m, int d ) [static]
       This is an overloaded member function, provided for convenience. It behaves essentially
       like the above function.

       Returns TRUE if the specified date (year y, month m and day d) is valid; otherwise returns
       FALSE.

       Example:

	   QDate::isValid( 2002, 5, 17 );  // TRUE   May 17th 2002 is valid
	   QDate::isValid( 2002, 2, 30 );  // FALSE  Feb 30th does not exist
	   QDate::isValid( 2004, 2, 29 );  // TRUE   2004 is a leap year
	   QDate::isValid( 1202, 6, 6 );   // FALSE  1202 is pre-Gregorian

       Warning: A y value in the range 00..99 is interpreted as 1900..1999.

       See also isNull() and setYMD().

bool QDate::leapYear ( int y ) [static]
       Returns TRUE if the specified year y is a leap year; otherwise returns FALSE.

QString QDate::longDayName ( int weekday ) [static]
       Returns the long name of the weekday.

       1 = "Monday", 2 = "Tuesday", ... 7 = "Sunday"

       The day names will be localized according to the system's locale settings.

       See also toString(), shortDayName(), shortMonthName(), and longMonthName().

QString QDate::longMonthName ( int month ) [static]
       Returns the long name of the month.

       1 = "January", 2 = "February", ... 12 = "December"

       The month names will be localized according to the system's locale settings.

       See also toString(), shortMonthName(), shortDayName(), and longDayName().

int QDate::month () const
       Returns the month (January=1..December=12) of this date.

       See also year() and day().

       Example: dclock/dclock.cpp.

QString QDate::monthName ( int month ) [static]
       This function is obsolete. It is provided to keep old source working. We strongly advise
       against using it in new code.

       Use shortMonthName() instead.

bool QDate::operator!= ( const QDate & d ) const
       Returns TRUE if this date is different from d; otherwise returns FALSE.

bool QDate::operator< ( const QDate & d ) const
       Returns TRUE if this date is earlier than d, otherwise returns FALSE.

bool QDate::operator<= ( const QDate & d ) const
       Returns TRUE if this date is earlier than or equal to d, otherwise returns FALSE.

bool QDate::operator== ( const QDate & d ) const
       Returns TRUE if this date is equal to d; otherwise returns FALSE.

bool QDate::operator> ( const QDate & d ) const
       Returns TRUE if this date is later than d, otherwise returns FALSE.

bool QDate::operator>= ( const QDate & d ) const
       Returns TRUE if this date is later than or equal to d, otherwise returns FALSE.

bool QDate::setYMD ( int y, int m, int d )
       Sets the date's year y, month m and day d.

       y must be in the range 1752..8000, m must be in the range 1..12, and d must be in the
       range 1..31.

       Warning: If y is in the range 0..99, it is interpreted as 1900..1999.

       Returns TRUE if the date is valid; otherwise returns FALSE.

QString QDate::shortDayName ( int weekday ) [static]
       Returns the name of the weekday.

       1 = "Mon", 2 = "Tue", ... 7 = "Sun"

       The day names will be localized according to the system's locale settings.

       See also toString(), shortMonthName(), longMonthName(), and longDayName().

QString QDate::shortMonthName ( int month ) [static]
       Returns the name of the month.

       1 = "Jan", 2 = "Feb", ... 12 = "Dec"

       The month names will be localized according to the system's locale settings.

       See also toString(), longMonthName(), shortDayName(), and longDayName().

QString QDate::toString ( const QString & format ) const
       Returns the date as a string. The format parameter determines the format of the result
       string.

       These expressions may be used:

       <center>.nf

       </center>

       All other input characters will be ignored.

       Example format strings (assuming that the QDate is the 20<sup><small>th</small></sup> July
       1969): <center>.nf

       </center>

       See also QDate::toString() and QTime::toString().

QString QDate::toString ( Qt::DateFormat f = Qt::TextDate ) const
       This is an overloaded member function, provided for convenience. It behaves essentially
       like the above function.

       Returns the date as a string. The f parameter determines the format of the string.

       If f is Qt::TextDate, the string format is "Sat May 20 1995" (using the shortDayName() and
       shortMonthName() functions to generate the string, so the day and month names are locale
       specific).

       If f is Qt::ISODate, the string format corresponds to the ISO 8601 specification for
       representations of dates, which is YYYY-MM-DD where YYYY is the year, MM is the month of
       the year (between 01 and 12), and DD is the day of the month between 01 and 31.

       If f is Qt::LocalDate, the string format depends on the locale settings of the system.

       See also shortDayName() and shortMonthName().

int QDate::weekNumber ( int * yearNumber = 0 ) const
       Returns the week number (1 to 53), and stores the year in *yearNumber unless yearNumber is
       null (the default).

       Returns 0 if the date is invalid.

       In accordance with ISO 8601, weeks start on Monday and the first Thursday of a year is
       always in week 1 of that year. Most years have 52 weeks, but some have 53.

       *yearNumber is not always the same as year(). For example, 1 January 2000 has week number
       52 in the year 1999, and 31 December 2002 has week number 1 in the year 2003.

       See also isValid().

int QDate::year () const
       Returns the year (1752..8000) of this date.

       See also month() and day().

RELATED FUNCTION DOCUMENTATION
QDataStream &; operator<< ( QDataStream & s, const QDate & d )
       Writes the date, d, to the data stream, s.

       See also Format of the QDataStream operators.

QDataStream &; operator>> ( QDataStream & s, QDate & d )
       Reads a date from the stream s into d.

       See also Format of the QDataStream operators.

SEE ALSO
       http://doc.trolltech.com/qdate.html http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2001 Trolltech AS, http://www.trolltech.com.  See the license file included
       in the distribution for a complete license statement.

AUTHOR
       Generated automatically from the source code.

BUGS
       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is located at
       $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is
       provided as a convenience for those users who prefer man pages, although this format is
       not officially supported by Trolltech.

       If you find errors in this manual page, please report them to qt-bugs@trolltech.com.
       Please include the name of the manual page (qdate.3qt) and the Qt version (3.1.1).

Trolltech AS				 9 December 2002			       QDate(3qt)


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