QTime Class Reference

#include <qdatetime.h>

List of all members.

Detailed Description

The QTime class provides clock time functions.

A QTime object contains a clock time, i.e. the number of hours, minutes, seconds, and milliseconds since midnight. It can read the current time from the system clock and measure a span of elapsed time. It provides functions for comparing times and for manipulating a time by adding a number of milliseconds.

QTime uses the 24-hour clock format; it has no concept of AM/PM. Unlike QDateTime, QTime knows nothing about time zones or daylight savings time (DST).

A QTime object is typically created either by giving the number of hours, minutes, seconds, and milliseconds explicitly, or by using the static function currentTime(), which creates a QTime object that contains the system's local time. Note that the accuracy depends on the accuracy of the underlying operating system; not all systems provide 1-millisecond accuracy.

The hour(), minute(), second(), and msec() functions provide access to the number of hours, minutes, seconds, and milliseconds of the time. The same information is provided in textual format by the toString() function.

QTime provides a full set of operators to compare two QTime objects. One time is considered smaller than another if it is earlier than the other.

The time a given number of seconds or milliseconds later than a given time can be found using the addSecs() or addMSecs() functions. Correspondingly, the number of seconds or milliseconds between two times can be found using secsTo() or msecsTo().

QTime can be used to measure a span of elapsed time using the start(), restart(), and elapsed() functions.

See also:
QDate, QDateTime

Definition at line 115 of file qdatetime.h.

Public Member Functions

 QTime ()
 QTime (int h, int m, int s=0, int ms=0)
bool isNull () const
bool isValid () const
int hour () const
int minute () const
int second () const
int msec () const
QString toString (Qt::DateFormat f=Qt::TextDate) const
QString toString (const QString &format) const
bool setHMS (int h, int m, int s, int ms=0)
QTime addSecs (int secs) const
int secsTo (const QTime &) const
QTime addMSecs (int ms) const
int msecsTo (const QTime &) const
bool operator== (const QTime &other) const
bool operator!= (const QTime &other) const
bool operator< (const QTime &other) const
bool operator<= (const QTime &other) const
bool operator> (const QTime &other) const
bool operator>= (const QTime &other) const
void start ()
int restart ()
int elapsed () const

Static Public Member Functions

static QTime currentTime ()
static QTime fromString (const QString &s, Qt::DateFormat f=Qt::TextDate)
static QTime fromString (const QString &s, const QString &format)
static bool isValid (int h, int m, int s, int ms=0)

Private Types

enum  TimeFlag

Private Member Functions

int ds () const

Private Attributes

int mds

Friends

class QDateTime
class QDateTimePrivate
Q_CORE_EXPORT QDataStream & operator<< (QDataStream &, const QTime &)
Q_CORE_EXPORT QDataStream & operator>> (QDataStream &, QTime &)

Member Enumeration Documentation

enum QTime::TimeFlag [private]

Definition at line 162 of file qdatetime.h.

00162 { NullTime = -1 };

Constructor & Destructor Documentation

QTime::QTime (  )  [inline]

Constructs a null time object. A null time is identical to a QTime(0, 0, 0, 0) (i.e., midnight), except that isNull() and isValid() return false.

See also:
isNull(), isValid()

Definition at line 118 of file qdatetime.h.

Referenced by fromString().

00118 : mds(NullTime) {}

QTime::QTime ( int  h,
int  m,
int  s = 0,
int  ms = 0 
)

Constructs a time with hour h, minute m, seconds s and milliseconds ms.

h must be in the range 0 to 23, m and s must be in the range 0 to 59, and ms must be in the range 0 to 999.

See also:
isValid()

Definition at line 1239 of file qdatetime.cpp.

References setHMS().

01240 {
01241     setHMS(h, m, s, ms);
01242 }

Here is the call graph for this function:

Member Function Documentation

bool QTime::isNull (  )  const [inline]

Returns true if the time is null (i.e., the QTime object was constructed using the default constructor); otherwise returns false. A null time is also an invalid time.

See also:
isValid()

Definition at line 121 of file qdatetime.h.

Referenced by QSvgTinyDocument::draw(), QDateTime::isNull(), and RateController::transfer().

00121 { return mds == NullTime; }

bool QTime::isValid (  )  const

Returns true if the time is valid; otherwise returns false. For example, the time 23:30:55.746 is valid, but 24:12:30 is invalid.

See also:
isNull()

Definition at line 1262 of file qdatetime.cpp.

References mds, MSECS_PER_DAY, and NullTime.

Referenced by QDateTimeEditPrivate::emitSignals(), fmtDateTime(), QPSQLDriver::formatValue(), QSqlDriver::formatValue(), QIBaseDriver::formatValue(), QDateTime::isValid(), operator<<(), Q3TimeEdit::outOfRange(), QDateTime::QDateTime(), QDateTimeEdit::QDateTimeEdit(), QDateTime::setDate(), setHMS(), QDateTimeEdit::setMaximumTime(), QDateTimeEdit::setMinimumTime(), VariantDelegate::setModelData(), Q3TimeEdit::setRange(), QDateTimeEdit::setTime(), Q3TimeEdit::setTime(), QDateTimeEdit::setTimeRange(), Q3TimeEdit::time(), QTest::toString(), and toString().

01263 {
01264     return mds > NullTime && mds < MSECS_PER_DAY;
01265 }

int QTime::hour (  )  const

Returns the hour part (0 to 23) of the time.

See also:
minute(), second(), msec()

Definition at line 1274 of file qdatetime.cpp.

References ds(), and MSECS_PER_HOUR.

Referenced by QAbstractFormBuilder::createProperty(), Q3DateTimeEditor::eventFilter(), QODBCResult::exec(), QIBaseDriver::formatValue(), fromString(), localToUtc(), operator<<(), ShapedClock::paintEvent(), WorldTimeClock::paintEvent(), AnalogClock::paintEvent(), QDateTimeParser::parse(), QDateTimeParser::setDigit(), Q3TimeEdit::setTime(), QDateTimeEdit::stepBy(), Q3TimeEdit::stepDown(), Q3TimeEdit::stepUp(), QLocale::toString(), and toString().

01275 {
01276     return ds() / MSECS_PER_HOUR;
01277 }

Here is the call graph for this function:

int QTime::minute (  )  const

Returns the minute part (0 to 59) of the time.

See also:
hour(), second(), msec()

Definition at line 1285 of file qdatetime.cpp.

References ds(), MSECS_PER_HOUR, and MSECS_PER_MIN.

Referenced by QAbstractFormBuilder::createProperty(), Q3DateTimeEditor::eventFilter(), QODBCResult::exec(), QIBaseDriver::formatValue(), fromString(), localToUtc(), operator<<(), ShapedClock::paintEvent(), WorldTimeClock::paintEvent(), AnalogClock::paintEvent(), QDateTimeParser::parse(), QDateTimeParser::setDigit(), Q3TimeEdit::setTime(), QDateTimeEdit::stepBy(), Q3TimeEdit::stepDown(), Q3TimeEdit::stepUp(), QLocale::toString(), and toString().

01286 {
01287     return (ds() % MSECS_PER_HOUR) / MSECS_PER_MIN;
01288 }

Here is the call graph for this function:

int QTime::second (  )  const

Returns the second part (0 to 59) of the time.

See also:
hour(), minute(), msec()

Definition at line 1296 of file qdatetime.cpp.

References ds(), and SECS_PER_MIN.

Referenced by QAbstractFormBuilder::createProperty(), Q3DateTimeEditor::eventFilter(), QODBCResult::exec(), QIBaseDriver::formatValue(), fromString(), localToUtc(), now(), operator<<(), ShapedClock::paintEvent(), WorldTimeClock::paintEvent(), AnalogClock::paintEvent(), QDateTimeParser::parse(), QDateTimeParser::setDigit(), Q3TimeEdit::setTime(), DigitalClock::showTime(), Q3TimeEdit::stepDown(), Q3TimeEdit::stepUp(), QLocale::toString(), and toString().

01297 {
01298     return (ds() / 1000)%SECS_PER_MIN;
01299 }

Here is the call graph for this function:

int QTime::msec (  )  const

Returns the millisecond part (0 to 999) of the time.

See also:
hour(), minute(), second()

Definition at line 1307 of file qdatetime.cpp.

References ds().

Referenced by Q3DateTimeEditor::eventFilter(), QODBCResult::exec(), QPSQLDriver::formatValue(), QIBaseDriver::formatValue(), fromString(), localToUtc(), now(), operator-(), operator<<(), QDateTimeParser::parse(), QDateTimeParser::setDigit(), QLocale::toString(), CompositionRenderer::updateCirclePos(), and utcToLocal().

01308 {
01309     return ds() % 1000;
01310 }

Here is the call graph for this function:

QString QTime::toString ( Qt::DateFormat  f = Qt::TextDate  )  const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns the time as a string. Milliseconds are not included. The f parameter determines the format of the string.

If f is Qt::TextDate, the string format is HH:MM:SS; e.g. 1 second before midnight would be "23:59:59".

If f is Qt::ISODate, the string format corresponds to the ISO 8601 extended specification for representations of dates, which is also HH:MM:SS.

If f is Qt::LocalDate or Qt::SystemLocaleDate, the string format depends on the locale settings of the system. Identical to calling QLocale::system().toString(time, QLocale::ShortFormat). {Qt::LocalDate has been deprecated, please use Qt::SystemLocaleDate instead.}

If f is Qt::LocaleDate, the string format depends on the default application locale. This is the locale set with QLocale::setDefault(), or the system locale if no default locale has been set. Identical to calling QLocale().toString(time, QLocale::ShortFormat);

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

If the datetime is invalid, an empty string will be returned.

Definition at line 1344 of file qdatetime.cpp.

References QString::arg(), QString::fromLatin1(), hour(), Qt::ISODate, isValid(), Qt::LocaleDate, minute(), second(), QLocale::ShortFormat, QLocale::system(), Qt::SystemLocaleDate, Qt::TextDate, and QLocale::toString().

Referenced by Window::createDateTimeEdits(), QPSQLDriver::formatValue(), QSqlDriver::formatValue(), QODBCDriver::formatValue(), operator<<(), Window::setFormatString(), DigitalClock::showTime(), QDateTime::toString(), QTest::toString(), and qdesigner_internal::TimeProperty::toString().

01345 {
01346     if (!isValid())
01347         return QString();
01348 
01349     switch (f) {
01350     case Qt::SystemLocaleDate:
01351         return QLocale::system().toString(*this, QLocale::ShortFormat);
01352     case Qt::LocaleDate:
01353         return QLocale().toString(*this, QLocale::ShortFormat);
01354     default:
01355     case Qt::ISODate:
01356     case Qt::TextDate:
01357         return QString::fromLatin1("%1:%2:%3")
01358             .arg(hour(), 2, 10, QLatin1Char('0'))
01359             .arg(minute(), 2, 10, QLatin1Char('0'))
01360             .arg(second(), 2, 10, QLatin1Char('0'));
01361     }
01362 }

Here is the call graph for this function:

QString QTime::toString ( const QString &  format  )  const

Returns the time as a string. The format parameter determines the format of the result string.

These expressions may be used:

Expression Output h the hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display) hh the hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display) H the hour without a leading zero (0 to 23, even with AM/PM display) HH the hour with a leading zero (00 to 23, even with AM/PM display) m the minute without a leading zero (0 to 59) mm the minute with a leading zero (00 to 59) s the second without a leading zero (0 to 59) ss the second with a leading zero (00 to 59) z the milliseconds without leading zeroes (0 to 999) zzz the milliseconds with leading zeroes (000 to 999) AP or A use AM/PM display. AP will be replaced by either "AM" or "PM". ap or a use am/pm display. ap will be replaced by either "am" or "pm".

All other input characters will be ignored. Any sequence of characters that are enclosed in singlequotes will be treated as text and not be used as an expression.

Example format strings (assuming that the QTime is 14:13:09.042)

Format Result hh:mm:ss.zzz 14:13:09.042 h:m:s ap 2:13:9 pm H:m:s a 14:13:9 pm

If the datetime is invalid, an empty string will be returned.

See also:
QDate::toString() QDateTime::toString()

Definition at line 1409 of file qdatetime.cpp.

References fmtDateTime().

01410 {
01411     return fmtDateTime(format, this, 0);
01412 }

Here is the call graph for this function:

bool QTime::setHMS ( int  h,
int  m,
int  s,
int  ms = 0 
)

Sets the time to hour h, minute m, seconds s and milliseconds ms.

h must be in the range 0 to 23, m and s must be in the range 0 to 59, and ms must be in the range 0 to 999. Returns true if the set time is valid; otherwise returns false.

See also:
isValid()

Definition at line 1425 of file qdatetime.cpp.

References isValid(), mds, NullTime, SECS_PER_HOUR, and SECS_PER_MIN.

Referenced by Q3DateTimeEditor::eventFilter(), QDateTime::fromString(), operator>>(), and QTime().

01426 {
01427     if (!isValid(h,m,s,ms)) {
01428         mds = NullTime;                // make this invalid
01429         return false;
01430     }
01431     mds = (h*SECS_PER_HOUR + m*SECS_PER_MIN + s)*1000 + ms;
01432     return true;
01433 }

Here is the call graph for this function:

QTime QTime::addSecs ( int  nsecs  )  const

Returns a QTime object containing a time nsecs seconds later than the time of this object (or earlier if nsecs is negative).

Note that the time will wrap if it passes midnight.

Example:

        QTime n(14, 0, 0);                // n == 14:00:00
        QTime t;
        t = n.addSecs(70);                // t == 14:01:10
        t = n.addSecs(-70);               // t == 13:58:50
        t = n.addSecs(10 * 60 * 60 + 5);  // t == 00:00:05
        t = n.addSecs(-15 * 60 * 60);     // t == 23:00:00

See also:
addMSecs(), secsTo(), QDateTime::addSecs()

Definition at line 1455 of file qdatetime.cpp.

References addMSecs().

Referenced by WorldTimeClock::paintEvent(), and QDateTime::setTime_t().

01456 {
01457     return addMSecs(nsecs * 1000);
01458 }

Here is the call graph for this function:

int QTime::secsTo ( const QTime &  t  )  const

Returns the number of seconds from this time to t. If t is earlier than this time, the number of seconds returned is negative.

Because QTime measures time within a day and there are 86400 seconds in a day, the result is always between -86400 and 86400.

See also:
addSecs(), QDateTime::secsTo()

Definition at line 1471 of file qdatetime.cpp.

References ds(), and t.

Referenced by CannonField::newTarget(), and QDateTime::secsTo().

01472 {
01473     return (t.ds() - ds()) / 1000;
01474 }

Here is the call graph for this function:

QTime QTime::addMSecs ( int  ms  )  const

Returns a QTime object containing a time ms milliseconds later than the time of this object (or earlier if ms is negative).

Note that the time will wrap if it passes midnight. See addSecs() for an example.

See also:
addSecs(), msecsTo()

Definition at line 1486 of file qdatetime.cpp.

References ds(), MSECS_PER_DAY, and t.

Referenced by addSecs(), operator+(), operator-(), QSvgTinyDocument::setCurrentFrame(), and AnimationSaveWidget::toggleRecord().

01487 {
01488     QTime t;
01489     if (ms < 0) {
01490         // % not well-defined for -ve, but / is.
01491         int negdays = (MSECS_PER_DAY - ms) / MSECS_PER_DAY;
01492         t.mds = (ds() + ms + negdays * MSECS_PER_DAY) % MSECS_PER_DAY;
01493     } else {
01494         t.mds = (ds() + ms) % MSECS_PER_DAY;
01495     }
01496     return t;
01497 }

Here is the call graph for this function:

int QTime::msecsTo ( const QTime &  t  )  const

Returns the number of milliseconds from this time to t. If t is earlier than this time, the number of milliseconds returned is negative.

Because QTime measures time within a day and there are 86400 seconds in a day, the result is always between -86400000 and 86400000 ms.

See also:
secsTo(), addMSecs()

Definition at line 1511 of file qdatetime.cpp.

References ds(), and t.

Referenced by QDateTimeParser::checkIntermediate(), QX11Data::clipboardWaitForEvent(), QDragManager::drag(), elapsed(), Q3ListView::keyPressEvent(), restart(), toTime(), and toTimeStamp().

01512 {
01513     return t.ds() - ds();
01514 }

Here is the call graph for this function:

bool QTime::operator== ( const QTime &  t  )  const [inline]

Returns true if this time is equal to t; otherwise returns false.

Definition at line 139 of file qdatetime.h.

References mds.

00139 { return mds == other.mds; }

bool QTime::operator!= ( const QTime &  t  )  const [inline]

Returns true if this time is different from t; otherwise returns false.

Definition at line 140 of file qdatetime.h.

References mds.

00140 { return mds != other.mds; }

bool QTime::operator< ( const QTime &  t  )  const [inline]

Returns true if this time is earlier than t; otherwise returns false.

Definition at line 141 of file qdatetime.h.

References mds.

00141 { return mds < other.mds; }

bool QTime::operator<= ( const QTime &  t  )  const [inline]

Returns true if this time is earlier than or equal to t; otherwise returns false.

Definition at line 142 of file qdatetime.h.

References mds.

00142 { return mds <= other.mds; }

bool QTime::operator> ( const QTime &  t  )  const [inline]

Returns true if this time is later than t; otherwise returns false.

Definition at line 143 of file qdatetime.h.

References mds.

00143 { return mds > other.mds; }

bool QTime::operator>= ( const QTime &  t  )  const [inline]

Returns true if this time is later than or equal to t; otherwise returns false.

Definition at line 144 of file qdatetime.h.

References mds.

00144 { return mds >= other.mds; }

QTime QTime::currentTime (  )  [static]

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns the current time as reported by the system clock.

Note that the accuracy depends on the accuracy of the underlying operating system; not all systems provide 1-millisecond accuracy.

Definition at line 1564 of file qdatetime.cpp.

References mds, MSECS_PER_HOUR, MSECS_PER_MIN, and t.

Referenced by QX11Data::clipboardWaitForEvent(), Window::createDateTimeEdits(), QDateTime::currentDateTime(), QDragManager::drag(), elapsed(), QTreeView::keyboardSearch(), QAbstractItemView::keyboardSearch(), Q3ListView::keyPressEvent(), main(), CannonField::newTarget(), ShapedClock::paintEvent(), WorldTimeClock::paintEvent(), AnalogClock::paintEvent(), restart(), Producer::run(), DigitalClock::showTime(), and start().

01565 {
01566     QTime ct;
01567 
01568 #if defined(Q_OS_WIN)
01569     SYSTEMTIME st;
01570     memset(&st, 0, sizeof(SYSTEMTIME));
01571     GetLocalTime(&st);
01572     ct.mds = MSECS_PER_HOUR * st.wHour + MSECS_PER_MIN * st.wMinute + 1000 * st.wSecond
01573              + st.wMilliseconds;
01574 #elif defined(Q_OS_UNIX)
01575     // posix compliant system
01576     struct timeval tv;
01577     gettimeofday(&tv, 0);
01578     time_t ltime = tv.tv_sec;
01579     tm *t;
01580 
01581 #if !defined(QT_NO_THREAD) && defined(_POSIX_THREAD_SAFE_FUNCTIONS)
01582     // use the reentrant version of localtime() where available
01583     tm res;
01584     t = localtime_r(&ltime, &res);
01585 #else
01586     t = localtime(&ltime);
01587 #endif
01588 
01589     ct.mds = MSECS_PER_HOUR * t->tm_hour + MSECS_PER_MIN * t->tm_min + 1000 * t->tm_sec
01590              + tv.tv_usec / 1000;
01591 #else
01592     time_t ltime; // no millisecond resolution
01593     ::time(&ltime);
01594     tm *t;
01595     localtime(&ltime);
01596     ct.mds = MSECS_PER_HOUR * t->tm_hour + MSECS_PER_MIN * t->tm_min + 1000 * t->tm_sec;
01597 #endif
01598     return ct;
01599 }

QTime QTime::fromString ( const QString &  string,
Qt::DateFormat  format = Qt::TextDate 
) [static]

Returns the time represented in the string as a QTime using the format given, or an invalid time if this is not possible.

Warning:
Note that Qt::LocalDate cannot be used here.

Definition at line 1610 of file qdatetime.cpp.

References hour(), Qt::LocalDate, minute(), msec(), NullTime, qMin(), qRound(), QTime(), qWarning(), s, second(), and t.

Referenced by convert(), QPSQLResult::data(), QDateTime::fromString(), qTimeFromString(), and VariantDelegate::setModelData().

01611 {
01612     if (s.isEmpty() || f == Qt::LocalDate) {
01613         qWarning("QTime::fromString: Parameter out of range");
01614         QTime t;
01615         t.mds = NullTime;
01616         return t;
01617     }
01618 
01619     const int hour(s.mid(0, 2).toInt());
01620     const int minute(s.mid(3, 2).toInt());
01621     const int second(s.mid(6, 2).toInt());
01622 
01623     const QString msec_s(QLatin1String("0.") + s.mid(9, 4));
01624     const float msec(msec_s.toFloat());
01625     return QTime(hour, minute, second, qMin(qRound(msec * 1000.0), 999));
01626 }

Here is the call graph for this function:

QTime QTime::fromString ( const QString &  string,
const QString &  format 
) [static]

Returns the QTime represented by the string, using the format given, or an invalid time if the string cannot be parsed.

These expressions may be used for the format:

Expression Output h the hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display) hh the hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display) m the minute without a leading zero (0 to 59) mm the minute with a leading zero (00 to 59) s the second without a leading zero (0 to 59) ss the second with a leading zero (00 to 59) z the milliseconds without leading zeroes (0 to 999) zzz the milliseconds with leading zeroes (000 to 999) AP interpret as an AM/PM time. AP must be either "AM" or "PM". ap Interpret as an AM/PM time. ap must be either "am" or "pm".

All other input characters will be treated as text. Any sequence of characters that are enclosed in single quotes will also be treated as text and not be used as an expression.

        QTime time = QTime::fromString("1mm12car00", "m'mm'hcarss");
        // time is 12:01.00

If the format is not satisfied an invalid QTime is returned. Expressions that do not expect leading zeroes to be given (h, m, s and z) are greedy. This means that they will use two digits even if this puts them outside the range of accepted values and leaves too few digits for other sections. For example, the following string could have meant 00:07:10, but the m will grab two digits, resulting in an invalid time:

        QTime time = QTime::fromString("00:710", "hh:ms"); // invalid

Any field that is not represented in the format will be set to zero. For example:

        QTime time = QTime::fromString("1.30", "m.s");
        // time is 00:01:30.000

See also:
QDateTime::fromString() QDate::fromString() QDate::toString() QDateTime::toString() QTime::toString()

Definition at line 1687 of file qdatetime.cpp.

References QDateTimeParser::fromString(), QDateTimeParser::parseFormat(), and QVariant::Time.

01688 {
01689     QTime time;
01690 #ifndef QT_BOOTSTRAPPED
01691     QDateTimeParser dt(QVariant::Time);
01692     if (dt.parseFormat(format))
01693         dt.fromString(string, 0, &time);
01694 #else
01695     Q_UNUSED(string);
01696     Q_UNUSED(format);
01697 #endif
01698     return time;
01699 }

Here is the call graph for this function:

bool QTime::isValid ( int  h,
int  m,
int  s,
int  ms = 0 
) [static]

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Returns true if the specified time is valid; otherwise returns false.

The time is valid if h is in the range 0 to 23, m and s are in the range 0 to 59, and ms is in the range 0 to 999.

Example:

        QTime::isValid(21, 10, 30); // returns true
        QTime::isValid(22, 5,  62); // returns false

Definition at line 1721 of file qdatetime.cpp.

01722 {
01723     return (uint)h < 24 && (uint)m < 60 && (uint)s < 60 && (uint)ms < 1000;
01724 }

void QTime::start (  ) 

Sets this time to the current time. This is practical for timing:

        QTime t;
        t.start();
        some_lengthy_task();
        qDebug("Time elapsed: %d ms", t.elapsed());

See also:
restart(), elapsed(), currentTime()

Definition at line 1740 of file qdatetime.cpp.

References currentTime().

Referenced by QWidgetAnimator::animate(), QSocks5SocketEngine::bind(), QSocks5SocketEngine::close(), QSvgTinyDocument::draw(), PathDeformRenderer::mouseReleaseEvent(), QMoviePrivate::next(), QGraphicsView::paintEvent(), PathDeformRenderer::PathDeformRenderer(), Connection::processReadyRead(), QTest::qWait(), QRollEffect::run(), QAlphaWidget::run(), PathDeformRenderer::setAnimated(), Q3ProgressDialog::setProgress(), AnimationSaveWidget::toggleRecord(), RateController::transfer(), QProcessPrivate::waitForBytesWritten(), QProcess::waitForBytesWritten(), QAbstractSocket::waitForBytesWritten(), QAbstractSocket::waitForConnected(), QAbstractSocket::waitForDisconnected(), QProcess::waitForFinished(), QProcessPrivate::waitForFinished(), QSocks5SocketEngine::waitForRead(), QAbstractSocket::waitForReadyRead(), QProcessPrivate::waitForReadyRead(), QSocks5SocketEngine::waitForWrite(), and QSocks5SocketEngine::write().

01741 {
01742     *this = currentTime();
01743 }

Here is the call graph for this function:

int QTime::restart (  ) 

Sets this time to the current time and returns the number of milliseconds that have elapsed since the last time start() or restart() was called.

This function is guaranteed to be atomic and is thus very handy for repeated measurements. Call start() to start the first measurement, and restart() for each later measurement.

Note that the counter wraps to zero 24 hours after the last call to start() or restart().

Warning:
If the system's clock setting has been changed since the last time start() or restart() was called, the result is undefined. This can happen when daylight savings time is turned on or off.
See also:
start(), elapsed(), currentTime()

Definition at line 1765 of file qdatetime.cpp.

References currentTime(), msecsTo(), n, and t.

Referenced by QWidgetAnimator::animationStep(), DisplayWidget::paintEvent(), Connection::processData(), QSvgTinyDocument::restartAnimation(), and PathDeformRenderer::timerEvent().

01766 {
01767     QTime t = currentTime();
01768     int n = msecsTo(t);
01769     if (n < 0)                                // passed midnight
01770         n += 86400*1000;
01771     *this = t;
01772     return n;
01773 }

Here is the call graph for this function:

int QTime::elapsed (  )  const

Returns the number of milliseconds that have elapsed since the last time start() or restart() was called.

Note that the counter wraps to zero 24 hours after the last call to start() or restart.

Note that the accuracy depends on the accuracy of the underlying operating system; not all systems provide 1-millisecond accuracy.

Warning:
If the system's clock setting has been changed since the last time start() or restart() was called, the result is undefined. This can happen when daylight savings time is turned on or off.
See also:
start(), restart()

Definition at line 1793 of file qdatetime.cpp.

References currentTime(), msecsTo(), and n.

Referenced by QSocks5SocketEngine::bind(), QSocks5SocketEngine::close(), QSvgTinyDocument::currentElapsed(), QSvgTinyDocument::currentFrame(), QMoviePrivate::next(), DisplayWidget::paintEvent(), QGraphicsView::paintEvent(), QTest::qWait(), QAlphaWidget::render(), QAlphaWidget::run(), QRollEffect::scroll(), Connection::sendPing(), QSvgTinyDocument::setCurrentFrame(), Q3ProgressDialog::setProgress(), AnimationSaveWidget::timerEvent(), AnimationSaveWidget::toggleRecord(), RateController::transfer(), QProcessPrivate::waitForBytesWritten(), QProcess::waitForBytesWritten(), QAbstractSocket::waitForBytesWritten(), QAbstractSocket::waitForConnected(), QAbstractSocket::waitForDisconnected(), QProcess::waitForFinished(), QProcessPrivate::waitForFinished(), QSocks5SocketEngine::waitForRead(), QAbstractSocket::waitForReadyRead(), QProcessPrivate::waitForReadyRead(), QSocks5SocketEngine::waitForWrite(), and QSocks5SocketEngine::write().

01794 {
01795     int n = msecsTo(currentTime());
01796     if (n < 0)                                // passed midnight
01797         n += 86400 * 1000;
01798     return n;
01799 }

Here is the call graph for this function:

int QTime::ds (  )  const [inline, private]

Definition at line 163 of file qdatetime.h.

Referenced by QDateTimePrivate::addMSecs(), addMSecs(), hour(), minute(), msec(), msecsTo(), second(), and secsTo().

00163 { return mds == -1 ? 0 : mds; }

Friends And Related Function Documentation

friend class QDateTime [friend]

Definition at line 166 of file qdatetime.h.

friend class QDateTimePrivate [friend]

Definition at line 167 of file qdatetime.h.

QDataStream & operator<< ( QDataStream &  out,
const QTime &  time 
) [friend]

Writes time to stream out.

See also:
{Format of the QDataStream operators}

Definition at line 2811 of file qdatetime.cpp.

02812 {
02813     return out << quint32(time.mds);
02814 }

QDataStream & operator>> ( QDataStream &  in,
QTime &  time 
) [friend]

Reads a time from stream in into the given time.

See also:
{Format of the QDataStream operators}

Definition at line 2824 of file qdatetime.cpp.

02825 {
02826     quint32 ds;
02827     in >> ds;
02828     time.mds = int(ds);
02829     return in;
02830 }

Member Data Documentation

int QTime::mds [private]

Definition at line 164 of file qdatetime.h.

Referenced by QDateTimePrivate::addMSecs(), currentTime(), isValid(), operator!=(), operator<(), operator<=(), operator==(), operator>(), operator>=(), and setHMS().

The documentation for this class was generated from the following files:
Generated on Thu Mar 15 19:33:45 2007 for Qt 4.2 User's Guide by  doxygen 1.5.1