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QTime Class Reference

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 (milli)seconds.

QTime uses the 24-hour clock format; it has no concept of AM/PM. It operates in local time; it knows nothing about time zones or daylight savings time.

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 clock 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 (milli)seconds between two times can be found using the secsTo() or msecsTo() functions.

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 111 of file qdatetime.h.


Public Member Functions

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

Static Public Member Functions

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

Private Types

enum  { NullTime = -1 }

Private Member Functions

int ds () const

Private Attributes

int mds

Friends

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

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

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