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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > TQDateTime Class Reference< / h1 >
< p > The TQDateTime class provides date and time functions.
< a href = "#details" > More...< / a >
< p > All the functions in this class are < a href = "threads.html#reentrant" > reentrant< / a > when TQt is built with thread support.< / p >
< p > < tt > #include < < a href = "qdatetime-h.html" > ntqdatetime.h< / a > > < / tt >
< p > < a href = "qdatetime-members.html" > List of all member functions.< / a >
< h2 > Public Members< / h2 >
< ul >
< li class = fn > < a href = "#TQDateTime" > < b > TQDateTime< / b > < / a > ()< / li >
< li class = fn > < a href = "#TQDateTime-2" > < b > TQDateTime< / b > < / a > ( const TQDate & date )< / li >
< li class = fn > < a href = "#TQDateTime-3" > < b > TQDateTime< / b > < / a > ( const TQDate & date, const TQTime & time )< / li >
< li class = fn > bool < a href = "#isNull" > < b > isNull< / b > < / a > () const< / li >
< li class = fn > bool < a href = "#isValid" > < b > isValid< / b > < / a > () const< / li >
< li class = fn > TQDate < a href = "#date" > < b > date< / b > < / a > () const< / li >
< li class = fn > TQTime < a href = "#time" > < b > time< / b > < / a > () const< / li >
< li class = fn > uint < a href = "#toTime_t" > < b > toTime_t< / b > < / a > () const< / li >
< li class = fn > void < a href = "#setDate" > < b > setDate< / b > < / a > ( const TQDate & date )< / li >
< li class = fn > void < a href = "#setTime" > < b > setTime< / b > < / a > ( const TQTime & time )< / li >
< li class = fn > void < a href = "#setTime_t-2" > < b > setTime_t< / b > < / a > ( uint secsSince1Jan1970UTC )< / li >
< li class = fn > void < a href = "#setTime_t" > < b > setTime_t< / b > < / a > ( uint secsSince1Jan1970UTC, TQt::TimeSpec ts )< / li >
< li class = fn > TQString < a href = "#toString-2" > < b > toString< / b > < / a > ( TQt::DateFormat f = TQt::TextDate ) const< / li >
< li class = fn > TQString < a href = "#toString" > < b > toString< / b > < / a > ( const TQString & format ) const< / li >
< li class = fn > TQDateTime < a href = "#addDays" > < b > addDays< / b > < / a > ( int ndays ) const< / li >
< li class = fn > TQDateTime < a href = "#addMonths" > < b > addMonths< / b > < / a > ( int nmonths ) const< / li >
< li class = fn > TQDateTime < a href = "#addYears" > < b > addYears< / b > < / a > ( int nyears ) const< / li >
< li class = fn > TQDateTime < a href = "#addSecs" > < b > addSecs< / b > < / a > ( int nsecs ) const< / li >
< li class = fn > int < a href = "#daysTo" > < b > daysTo< / b > < / a > ( const TQDateTime & dt ) const< / li >
< li class = fn > int < a href = "#secsTo" > < b > secsTo< / b > < / a > ( const TQDateTime & dt ) const< / li >
< li class = fn > bool < a href = "#operator-eq-eq" > < b > operator==< / b > < / a > ( const TQDateTime & dt ) const< / li >
< li class = fn > bool < a href = "#operator!-eq" > < b > operator!=< / b > < / a > ( const TQDateTime & dt ) const< / li >
< li class = fn > bool < a href = "#operator-lt" > < b > operator< < / b > < / a > ( const TQDateTime & dt ) const< / li >
< li class = fn > bool < a href = "#operator-lt-eq" > < b > operator< =< / b > < / a > ( const TQDateTime & dt ) const< / li >
< li class = fn > bool < a href = "#operator-gt" > < b > operator> < / b > < / a > ( const TQDateTime & dt ) const< / li >
< li class = fn > bool < a href = "#operator-gt-eq" > < b > operator> =< / b > < / a > ( const TQDateTime & dt ) const< / li >
< / ul >
< h2 > Static Public Members< / h2 >
< ul >
< li class = fn > TQDateTime < a href = "#currentDateTime-2" > < b > currentDateTime< / b > < / a > ()< / li >
< li class = fn > TQDateTime < a href = "#currentDateTime" > < b > currentDateTime< / b > < / a > ( TQt::TimeSpec ts )< / li >
< li class = fn > TQDateTime < a href = "#fromString" > < b > fromString< / b > < / a > ( const TQString & s, TQt::DateFormat f = TQt::TextDate )< / li >
< / ul >
< h2 > Related Functions< / h2 >
< ul >
< li class = fn > TQDataStream & < a href = "#operator-lt-lt" > < b > operator< < < / b > < / a > ( TQDataStream & s, const TQDateTime & dt )< / li >
< li class = fn > TQDataStream & < a href = "#operator-gt-gt" > < b > operator> > < / b > < / a > ( TQDataStream & s, TQDateTime & dt )< / li >
< / ul >
< hr > < a name = "details" > < / a > < h2 > Detailed Description< / h2 >
The TQDateTime class provides date and time functions.
< p >
< p > A TQDateTime object contains a calendar date and a clock time (a
"datetime"). It is a combination of the < a href = "qdate.html" > TQDate< / a > and < a href = "qtime.html" > TQTime< / a > classes.
It can read the current datetime from the system clock. It
provides functions for comparing datetimes and for manipulating a
datetime by adding a number of seconds, days, months or years.
< p > A TQDateTime object is typically created either by giving a date
and time explicitly in the constructor, or by using the static
function < a href = "#currentDateTime" > currentDateTime< / a > (), which returns a TQDateTime object set
to the system clock's time. The date and time can be changed with
< a href = "#setDate" > setDate< / a > () and < a href = "#setTime" > setTime< / a > (). A datetime can also be set using the
< a href = "#setTime_t" > setTime_t< / a > () function, which takes a POSIX-standard "number of
seconds since 00:00:00 on January 1, 1970" value. The < a href = "#fromString" > fromString< / a > ()
function returns a TQDateTime given a string and a date format
which is used to interpret the date within the string.
< p > The < a href = "#date" > date< / a > () and < a href = "#time" > time< / a > () functions provide access to the date and
time parts of the datetime. The same information is provided in
textual format by the < a href = "#toString" > toString< / a > () function.
< p > TQDateTime provides a full set of operators to compare two
TQDateTime objects where smaller means earlier and larger means
later.
< p > You can increment (or decrement) a datetime by a given number of
seconds using < a href = "#addSecs" > addSecs< / a > () or days using < a href = "#addDays" > addDays< / a > (). Similarly you can
use < a href = "#addMonths" > addMonths< / a > () and < a href = "#addYears" > addYears< / a > (). The < a href = "#daysTo" > daysTo< / a > () function returns the
number of days between two datetimes, and < a href = "#secsTo" > secsTo< / a > () returns the
number of seconds between two datetimes.
< p > The range of a datetime object is constrained to the ranges of the
< a href = "qdate.html" > TQDate< / a > and < a href = "qtime.html" > TQTime< / a > objects which it embodies.
< p > < p > See also < a href = "qdate.html" > TQDate< / a > , < a href = "qtime.html" > TQTime< / a > , < a href = "ntqdatetimeedit.html" > TQDateTimeEdit< / a > , and < a href = "time.html" > Time and Date< / a > .
< hr > < h2 > Member Function Documentation< / h2 >
< h3 class = fn > < a name = "TQDateTime" > < / a > TQDateTime::TQDateTime ()
< / h3 >
< p > Constructs a null datetime (i.e. null date and null time). A null
datetime is invalid, since the date is invalid.
< p > < p > See also < a href = "#isValid" > isValid< / a > ().
< h3 class = fn > < a name = "TQDateTime-2" > < / a > TQDateTime::TQDateTime ( const < a href = "qdate.html" > TQDate< / a > & date )
< / h3 >
Constructs a datetime with date < em > date< / em > and null (but valid) time
(00:00:00.000).
< h3 class = fn > < a name = "TQDateTime-3" > < / a > TQDateTime::TQDateTime ( const < a href = "qdate.html" > TQDate< / a > & date, const < a href = "qtime.html" > TQTime< / a > & time )
< / h3 >
Constructs a datetime with date < em > date< / em > and time < em > time< / em > .
< h3 class = fn > < a href = "ntqdatetime.html" > TQDateTime< / a > < a name = "addDays" > < / a > TQDateTime::addDays ( int ndays ) const
< / h3 >
Returns a TQDateTime object containing a datetime < em > ndays< / em > days
later than the datetime of this object (or earlier if < em > ndays< / em > is
negative).
< p > < p > See also < a href = "#daysTo" > daysTo< / a > (), < a href = "#addMonths" > addMonths< / a > (), < a href = "#addYears" > addYears< / a > (), and < a href = "#addSecs" > addSecs< / a > ().
< h3 class = fn > < a href = "ntqdatetime.html" > TQDateTime< / a > < a name = "addMonths" > < / a > TQDateTime::addMonths ( int nmonths ) const
< / h3 >
Returns a TQDateTime object containing a datetime < em > nmonths< / em > months
later than the datetime of this object (or earlier if < em > nmonths< / em >
is negative).
< p > < p > See also < a href = "#daysTo" > daysTo< / a > (), < a href = "#addDays" > addDays< / a > (), < a href = "#addYears" > addYears< / a > (), and < a href = "#addSecs" > addSecs< / a > ().
< h3 class = fn > < a href = "ntqdatetime.html" > TQDateTime< / a > < a name = "addSecs" > < / a > TQDateTime::addSecs ( int nsecs ) const
< / h3 >
Returns a TQDateTime object containing a datetime < em > nsecs< / em > seconds
later than the datetime of this object (or earlier if < em > nsecs< / em > is
negative).
< p > < p > See also < a href = "#secsTo" > secsTo< / a > (), < a href = "#addDays" > addDays< / a > (), < a href = "#addMonths" > addMonths< / a > (), and < a href = "#addYears" > addYears< / a > ().
< p > Example: < a href = "listviews-example.html#x136" > listviews/listviews.cpp< / a > .
< h3 class = fn > < a href = "ntqdatetime.html" > TQDateTime< / a > < a name = "addYears" > < / a > TQDateTime::addYears ( int nyears ) const
< / h3 >
Returns a TQDateTime object containing a datetime < em > nyears< / em > years
later than the datetime of this object (or earlier if < em > nyears< / em > is
negative).
< p > < p > See also < a href = "#daysTo" > daysTo< / a > (), < a href = "#addDays" > addDays< / a > (), < a href = "#addMonths" > addMonths< / a > (), and < a href = "#addSecs" > addSecs< / a > ().
< h3 class = fn > < a href = "ntqdatetime.html" > TQDateTime< / a > < a name = "currentDateTime" > < / a > TQDateTime::currentDateTime ( < a href = "ntqt.html#TimeSpec-enum" > TQt::TimeSpec< / a > ts )< tt > [static]< / tt >
< / h3 >
Returns the current datetime, as reported by the system clock, for the
TimeSpec < em > ts< / em > . The default TimeSpec is LocalTime.
< p > < p > See also < a href = "qdate.html#currentDate" > TQDate::currentDate< / a > (), < a href = "qtime.html#currentTime" > TQTime::currentTime< / a > (), and < a href = "ntqt.html#TimeSpec-enum" > TQt::TimeSpec< / a > .
< p > Example: < a href = "listviews-example.html#x137" > listviews/listviews.cpp< / a > .
< h3 class = fn > < a href = "ntqdatetime.html" > TQDateTime< / a > < a name = "currentDateTime-2" > < / a > TQDateTime::currentDateTime ()< tt > [static]< / tt >
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Returns the current datetime, as reported by the system clock.
< p > < p > See also < a href = "qdate.html#currentDate" > TQDate::currentDate< / a > () and < a href = "qtime.html#currentTime" > TQTime::currentTime< / a > ().
< h3 class = fn > < a href = "qdate.html" > TQDate< / a > < a name = "date" > < / a > TQDateTime::date () const
< / h3 >
< p > Returns the date part of the datetime.
< p > < p > See also < a href = "#setDate" > setDate< / a > () and < a href = "#time" > time< / a > ().
< h3 class = fn > int < a name = "daysTo" > < / a > TQDateTime::daysTo ( const < a href = "ntqdatetime.html" > TQDateTime< / a > & dt ) const
< / h3 >
Returns the number of days from this datetime to < em > dt< / em > (which is
negative if < em > dt< / em > is earlier than this datetime).
< p > < p > See also < a href = "#addDays" > addDays< / a > () and < a href = "#secsTo" > secsTo< / a > ().
< h3 class = fn > < a href = "ntqdatetime.html" > TQDateTime< / a > < a name = "fromString" > < / a > TQDateTime::fromString ( const < a href = "ntqstring.html" > TQString< / a > & s, < a href = "ntqt.html#DateFormat-enum" > TQt::DateFormat< / a > f = TQt::TextDate )< tt > [static]< / tt >
< / h3 >
Returns the TQDateTime represented by the string < em > s< / em > , using the
format < em > f< / em > , or an invalid datetime if this is not possible.
< p > Note for < a href = "ntqt.html#DateFormat-enum" > TQt::TextDate< / a > : 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.
< p > < b > Warning:< / b > Note that < a href = "ntqt.html#DateFormat-enum" > TQt::LocalDate< / a > cannot be used here.
< h3 class = fn > bool < a name = "isNull" > < / a > TQDateTime::isNull () const
< / h3 >
< p > Returns TRUE if both the date and the time are null; otherwise
returns FALSE. A null datetime is invalid.
< p > < p > See also < a href = "qdate.html#isNull" > TQDate::isNull< / a > () and < a href = "qtime.html#isNull" > TQTime::isNull< / a > ().
< h3 class = fn > bool < a name = "isValid" > < / a > TQDateTime::isValid () const
< / h3 >
< p > Returns TRUE if both the date and the time are valid; otherwise
returns FALSE.
< p > < p > See also < a href = "qdate.html#isValid" > TQDate::isValid< / a > () and < a href = "qtime.html#isValid" > TQTime::isValid< / a > ().
< h3 class = fn > bool < a name = "operator!-eq" > < / a > TQDateTime::operator!= ( const < a href = "ntqdatetime.html" > TQDateTime< / a > & dt ) const
< / h3 >
Returns TRUE if this datetime is different from < em > dt< / em > ; otherwise
returns FALSE.
< p > < p > See also < a href = "#operator-eq-eq" > operator==< / a > ().
< h3 class = fn > bool < a name = "operator-lt" > < / a > TQDateTime::operator< ( const < a href = "ntqdatetime.html" > TQDateTime< / a > & dt ) const
< / h3 >
Returns TRUE if this datetime is earlier than < em > dt< / em > ; otherwise
returns FALSE.
< h3 class = fn > bool < a name = "operator-lt-eq" > < / a > TQDateTime::operator< = ( const < a href = "ntqdatetime.html" > TQDateTime< / a > & dt ) const
< / h3 >
Returns TRUE if this datetime is earlier than or equal to < em > dt< / em > ;
otherwise returns FALSE.
< h3 class = fn > bool < a name = "operator-eq-eq" > < / a > TQDateTime::operator== ( const < a href = "ntqdatetime.html" > TQDateTime< / a > & dt ) const
< / h3 >
Returns TRUE if this datetime is equal to < em > dt< / em > ; otherwise returns FALSE.
< p > < p > See also < a href = "#operator!-eq" > operator!=< / a > ().
< h3 class = fn > bool < a name = "operator-gt" > < / a > TQDateTime::operator> ( const < a href = "ntqdatetime.html" > TQDateTime< / a > & dt ) const
< / h3 >
Returns TRUE if this datetime is later than < em > dt< / em > ; otherwise
returns FALSE.
< h3 class = fn > bool < a name = "operator-gt-eq" > < / a > TQDateTime::operator> = ( const < a href = "ntqdatetime.html" > TQDateTime< / a > & dt ) const
< / h3 >
Returns TRUE if this datetime is later than or equal to < em > dt< / em > ;
otherwise returns FALSE.
< h3 class = fn > int < a name = "secsTo" > < / a > TQDateTime::secsTo ( const < a href = "ntqdatetime.html" > TQDateTime< / a > & dt ) const
< / h3 >
Returns the number of seconds from this datetime to < em > dt< / em > (which
is negative if < em > dt< / em > is earlier than this datetime).
< p > Example:
< pre >
TQDateTime dt = TQDateTime::< a href = "#currentDateTime" > currentDateTime< / a > ();
TQDateTime xmas( TQDate(dt.< a href = "#date" > date< / a > ().year(),12,24), TQTime(17,00) );
< a href = "ntqapplication.html#qDebug" > tqDebug< / a > ( "There are %d seconds to Christmas", dt.< a href = "#secsTo" > secsTo< / a > (xmas) );
< / pre >
< p > < p > See also < a href = "#addSecs" > addSecs< / a > (), < a href = "#daysTo" > daysTo< / a > (), and < a href = "qtime.html#secsTo" > TQTime::secsTo< / a > ().
< h3 class = fn > void < a name = "setDate" > < / a > TQDateTime::setDate ( const < a href = "qdate.html" > TQDate< / a > & date )
< / h3 >
< p > Sets the date part of this datetime to < em > date< / em > .
< p > < p > See also < a href = "#date" > date< / a > () and < a href = "#setTime" > setTime< / a > ().
< h3 class = fn > void < a name = "setTime" > < / a > TQDateTime::setTime ( const < a href = "qtime.html" > TQTime< / a > & time )
< / h3 >
< p > Sets the time part of this datetime to < em > time< / em > .
< p > < p > See also < a href = "#time" > time< / a > () and < a href = "#setDate" > setDate< / a > ().
< h3 class = fn > void < a name = "setTime_t" > < / a > TQDateTime::setTime_t ( uint secsSince1Jan1970UTC, < a href = "ntqt.html#TimeSpec-enum" > TQt::TimeSpec< / a > ts )
< / h3 >
Sets the date and time to < em > ts< / em > time (< a href = "ntqt.html#TimeSpec-enum" > TQt::LocalTime< / a > or < a href = "ntqt.html#TimeSpec-enum" > TQt::UTC< / a > ) given the number of seconds that have passed since
1970-01-01T00:00:00, Coordinated Universal Time (UTC). On systems
that do not support timezones this function will behave as if
local time were UTC.
< p > On Windows, only a subset of < em > secsSince1Jan1970UTC< / em > values are
supported, as Windows starts counting from 1980.
< p > < p > See also < a href = "#toTime_t" > toTime_t< / a > ().
< h3 class = fn > void < a name = "setTime_t-2" > < / a > TQDateTime::setTime_t ( uint secsSince1Jan1970UTC )
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Convenience function that sets the date and time to local time
based on the given UTC time.
< h3 class = fn > < a href = "qtime.html" > TQTime< / a > < a name = "time" > < / a > TQDateTime::time () const
< / h3 >
< p > Returns the time part of the datetime.
< p > < p > See also < a href = "#setTime" > setTime< / a > () and < a href = "#date" > date< / a > ().
< h3 class = fn > < a href = "ntqstring.html" > TQString< / a > < a name = "toString" > < / a > TQDateTime::toString ( const < a href = "ntqstring.html" > TQString< / a > & format ) const
< / h3 >
Returns the datetime as a string. The < em > format< / em > parameter
determines the format of the result string.
< p > These expressions may be used for the date:
< p > < center > < table cellpadding = "4" cellspacing = "2" border = "0" >
< tr bgcolor = "#a2c511" > < th valign = "top" > Expression < th valign = "top" > Output
< tr bgcolor = "#f0f0f0" > < td valign = "top" > d < td valign = "top" > the day as number without a leading zero (1-31)
< tr bgcolor = "#d0d0d0" > < td valign = "top" > dd < td valign = "top" > the day as number with a leading zero (01-31)
< tr bgcolor = "#f0f0f0" > < td valign = "top" > ddd
< td valign = "top" > the abbreviated localized day name (e.g. 'Mon'..'Sun').
Uses < a href = "qdate.html#shortDayName" > TQDate::shortDayName< / a > ().
< tr bgcolor = "#d0d0d0" > < td valign = "top" > dddd
< td valign = "top" > the long localized day name (e.g. 'Monday'..'Sunday').
Uses < a href = "qdate.html#longDayName" > TQDate::longDayName< / a > ().
< tr bgcolor = "#f0f0f0" > < td valign = "top" > M < td valign = "top" > the month as number without a leading zero (1-12)
< tr bgcolor = "#d0d0d0" > < td valign = "top" > MM < td valign = "top" > the month as number with a leading zero (01-12)
< tr bgcolor = "#f0f0f0" > < td valign = "top" > MMM
< td valign = "top" > the abbreviated localized month name (e.g. 'Jan'..'Dec').
Uses < a href = "qdate.html#shortMonthName" > TQDate::shortMonthName< / a > ().
< tr bgcolor = "#d0d0d0" > < td valign = "top" > MMMM
< td valign = "top" > the long localized month name (e.g. 'January'..'December').
Uses < a href = "qdate.html#longMonthName" > TQDate::longMonthName< / a > ().
< tr bgcolor = "#f0f0f0" > < td valign = "top" > yy < td valign = "top" > the year as two digit number (00-99)
< tr bgcolor = "#d0d0d0" > < td valign = "top" > yyyy < td valign = "top" > the year as four digit number (1752-8000)
< / table > < / center >
< p > These expressions may be used for the time:
< p > < center > < table cellpadding = "4" cellspacing = "2" border = "0" >
< tr bgcolor = "#a2c511" > < th valign = "top" > Expression < th valign = "top" > Output
< tr bgcolor = "#f0f0f0" > < td valign = "top" > h
< td valign = "top" > the hour without a leading zero (0..23 or 1..12 if AM/PM display)
< tr bgcolor = "#d0d0d0" > < td valign = "top" > hh
< td valign = "top" > the hour with a leading zero (00..23 or 01..12 if AM/PM display)
< tr bgcolor = "#f0f0f0" > < td valign = "top" > m < td valign = "top" > the minute without a leading zero (0..59)
< tr bgcolor = "#d0d0d0" > < td valign = "top" > mm < td valign = "top" > the minute with a leading zero (00..59)
< tr bgcolor = "#f0f0f0" > < td valign = "top" > s < td valign = "top" > the second whithout a leading zero (0..59)
< tr bgcolor = "#d0d0d0" > < td valign = "top" > ss < td valign = "top" > the second whith a leading zero (00..59)
< tr bgcolor = "#f0f0f0" > < td valign = "top" > z < td valign = "top" > the milliseconds without leading zeroes (0..999)
< tr bgcolor = "#d0d0d0" > < td valign = "top" > zzz < td valign = "top" > the milliseconds with leading zeroes (000..999)
< tr bgcolor = "#f0f0f0" > < td valign = "top" > AP
< td valign = "top" > use AM/PM display. < em > AP< / em > will be replaced by either "AM" or "PM".
< tr bgcolor = "#d0d0d0" > < td valign = "top" > ap
< td valign = "top" > use am/pm display. < em > ap< / em > will be replaced by either "am" or "pm".
< / table > < / center >
< p > All other input characters will be ignored.
< p > Example format strings (assumed that the TQDateTime is
21< small > < sup > st< / sup > < / small > May 2001 14:13:09)
< p > < center > < table cellpadding = "4" cellspacing = "2" border = "0" >
< tr bgcolor = "#a2c511" > < th valign = "top" > Format < th valign = "top" > Result
< tr bgcolor = "#f0f0f0" > < td valign = "top" > dd.MM.yyyy < td valign = "top" colspan = "1" rowspan = "1" > 21.05.2001
< tr bgcolor = "#d0d0d0" > < td valign = "top" > ddd MMMM d yy < td valign = "top" colspan = "1" rowspan = "1" > Tue May 21 01
< tr bgcolor = "#f0f0f0" > < td valign = "top" > hh:mm:ss.zzz < td valign = "top" colspan = "1" rowspan = "1" > 14:13:09.042
< tr bgcolor = "#d0d0d0" > < td valign = "top" > h:m:s ap < td valign = "top" colspan = "1" rowspan = "1" > 2:13:9 pm
< / table > < / center >
< p > If the datetime is an invalid datetime, then < a href = "ntqstring.html#TQString-null" > TQString::null< / a > will be returned.
< p > < p > See also < a href = "qdate.html#toString" > TQDate::toString< / a > () and < a href = "qtime.html#toString" > TQTime::toString< / a > ().
< h3 class = fn > < a href = "ntqstring.html" > TQString< / a > < a name = "toString-2" > < / a > TQDateTime::toString ( < a href = "ntqt.html#DateFormat-enum" > TQt::DateFormat< / a > f = TQt::TextDate ) const
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Returns the datetime as a string. The < em > f< / em > parameter determines
the format of the string.
< p > If < em > f< / em > is < a href = "ntqt.html#DateFormat-enum" > TQt::TextDate< / a > , the string format is "Wed May 20
03:40:13 1998" (using < a href = "qdate.html#shortDayName" > TQDate::shortDayName< / a > (), < a href = "qdate.html#shortMonthName" > TQDate::shortMonthName< / a > (),
and < a href = "qtime.html#toString" > TQTime::toString< / a > () to generate the string, so the day and month
names will have localized names).
< p > If < em > f< / em > is < a href = "ntqt.html#DateFormat-enum" > TQt::ISODate< / a > , the string format corresponds to the
ISO 8601 extended specification for representations of dates and
times, which is YYYY-MM-DDTHH:MM:SS.
< p > If < em > f< / em > is < a href = "ntqt.html#DateFormat-enum" > TQt::LocalDate< / a > , the string format depends on the
locale settings of the system.
< p > If the format < em > f< / em > is invalid or the datetime is invalid, < a href = "#toString" > toString< / a > ()
returns a null string.
< p > < p > See also < a href = "qdate.html#toString" > TQDate::toString< / a > () and < a href = "qtime.html#toString" > TQTime::toString< / a > ().
< h3 class = fn > uint < a name = "toTime_t" > < / a > TQDateTime::toTime_t () const
< / h3 >
Returns the datetime as the number of seconds that have passed
since 1970-01-01T00:00:00, Coordinated Universal Time (UTC).
< p > On systems that do not support timezones, this function will
behave as if local time were UTC.
< p > < p > See also < a href = "#setTime_t" > setTime_t< / a > ().
< hr > < h2 > Related Functions< / h2 >
< h3 class = fn > < a href = "ntqdatastream.html" > TQDataStream< / a > & < a name = "operator-lt-lt" > < / a > operator< < ( < a href = "ntqdatastream.html" > TQDataStream< / a > & s, const < a href = "ntqdatetime.html" > TQDateTime< / a > & dt )
< / h3 >
< p > Writes the datetime < em > dt< / em > to the stream < em > s< / em > .
< p > < p > See also < a href = "datastreamformat.html" > Format of the TQDataStream operators< / a > .
< h3 class = fn > < a href = "ntqdatastream.html" > TQDataStream< / a > & < a name = "operator-gt-gt" > < / a > operator> > ( < a href = "ntqdatastream.html" > TQDataStream< / a > & s, < a href = "ntqdatetime.html" > TQDateTime< / a > & dt )
< / h3 >
< p > Reads a datetime from the stream < em > s< / em > into < em > dt< / em > .
< p > < p > See also < a href = "datastreamformat.html" > Format of the TQDataStream operators< / a > .
<!-- eof -->
< hr > < p >
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Copyright © 1995-2007
< a href = "http://www.trolltech.com/" > Trolltech< / a > . All Rights Reserved.< p > < address > < hr > < div align = center >
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< a href = "troll.html" > Trolltech< / a > < td align = center > < a href = "trademarks.html" > Trademarks< / a >
< td align = right > < div align = right > TQt 3.3.8< / div >
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