|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectcom.trolltech.qt.internal.QSignalEmitterInternal
com.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.core.QTime
public class QTime
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.
QDate
, and QDateTime
.
Nested Class Summary |
---|
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
---|
QSignalEmitter.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9 |
Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal |
Field Summary |
---|
Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
currentSender |
Constructor Summary | |
---|---|
QTime()
Constructs a null time object. |
|
QTime(int h,
int m)
Constructs a time with hour h, minute m, seconds s and milliseconds ms. |
|
QTime(int h,
int m,
int s)
Constructs a time with hour h, minute m, seconds s and milliseconds ms. |
|
QTime(int h,
int m,
int s,
int ms)
Constructs a time with hour h, minute m, seconds s and milliseconds ms. |
Method Summary | |
---|---|
QTime |
addMSecs(int ms)
Returns a QTime object containing a time ms milliseconds later than the time of this object (or earlier if ms is negative). |
QTime |
addSecs(int secs)
Returns a QTime object containing a time s seconds later than the time of this object (or earlier if s is negative). |
QTime |
clone()
This method is reimplemented for internal reasons |
static QTime |
currentTime()
Returns the current time as reported by the system clock. |
int |
elapsed()
Returns the number of milliseconds that have elapsed since the last time start() or restart() was called. |
static QTime |
fromString(java.lang.String s)
Returns the time represented in the string as a QTime using the format given, or an invalid time if this is not possible. |
static QTime |
fromString(java.lang.String s,
Qt.DateFormat f)
Returns the time represented in the string as a QTime using the format given, or an invalid time if this is not possible. |
static QTime |
fromString(java.lang.String s,
java.lang.String format)
Returns the QTime represented by the string, using the format given, or an invalid time if the string cannot be parsed. |
int |
hour()
Returns the hour part (0 to 23) of the time. |
boolean |
isNull()
Returns true if the time is null (i. |
boolean |
isValid()
Returns true if the time is valid; otherwise returns false. |
static boolean |
isValid(int h,
int m,
int s)
Returns true if the specified time is valid; otherwise returns false. |
static boolean |
isValid(int h,
int m,
int s,
int ms)
Returns true if the specified time is valid; otherwise returns false. |
int |
minute()
Returns the minute part (0 to 59) of the time. |
int |
msec()
Returns the millisecond part (0 to 999) of the time. |
int |
msecsTo(QTime arg__1)
Returns the number of milliseconds from this time to t. |
void |
readFrom(QDataStream arg__1)
|
int |
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. |
int |
second()
Returns the second part (0 to 59) of the time. |
int |
secsTo(QTime arg__1)
Returns the number of seconds from this time to t. |
boolean |
setHMS(int h,
int m,
int s)
Sets the time to hour h, minute m, seconds s and milliseconds ms. |
boolean |
setHMS(int h,
int m,
int s,
int ms)
Sets the time to hour h, minute m, seconds s and milliseconds ms. |
void |
start()
Sets this time to the current time. |
java.lang.String |
toString()
|
java.lang.String |
toString(Qt.DateFormat f)
|
java.lang.String |
toString(java.lang.String format)
|
void |
writeTo(QDataStream arg__1)
|
Methods inherited from class com.trolltech.qt.QtJambiObject |
---|
dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
---|
blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread |
Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
__qt_signalInitialization |
Methods inherited from class java.lang.Object |
---|
getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface java.lang.Comparable |
---|
compareTo |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
---|
disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Constructor Detail |
---|
public QTime()
QTime
(0, 0, 0, 0) (i.e., midnight) object, except that isNull()
returns true and isValid()
returns false. isNull()
, and isValid()
.
public QTime(int h, int m, int s)
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.
isValid()
.
public QTime(int h, int m)
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.
isValid()
.
public QTime(int h, int m, int s, int 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.
isValid()
.
Method Detail |
---|
public final QTime addMSecs(int ms)
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.
addSecs()
, and msecsTo()
.
public final QTime addSecs(int secs)
QTime
object containing a time s seconds later than the time of this object (or earlier if s is negative). Note that the time will wrap if it passes midnight.
Example:
QTime n = new QTime(14, 0, 0); // n == 14:00:00 QTime t = new QTime(); 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
addMSecs()
, secsTo()
, and QDateTime::addSecs()
.
public final int elapsed()
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.
start()
, and restart()
.
public final int hour()
minute()
, second()
, and msec()
.
public final boolean isNull()
QTime
object was constructed using the default constructor); otherwise returns false. A null time is also an invalid time. isValid()
.
public final boolean isValid()
isNull()
.
public final int minute()
hour()
, second()
, and msec()
.
public final int msec()
hour()
, minute()
, and second()
.
public final int msecsTo(QTime arg__1)
Because QTime
measures time within a day and there are 86400 seconds in a day, the result is always between -86400000 and 86400000 ms.
secsTo()
, and addMSecs()
.
public final void writeTo(QDataStream arg__1)
public final void readFrom(QDataStream arg__1)
public final int restart()
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.
start()
, elapsed()
, and currentTime()
.
public final int second()
hour()
, minute()
, and msec()
.
public final int secsTo(QTime arg__1)
Because QTime
measures time within a day and there are 86400 seconds in a day, the result is always between -86400 and 86400.
addSecs()
, and QDateTime::secsTo()
.
public final boolean setHMS(int h, int m, int s)
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.
isValid()
.
public final boolean setHMS(int h, int m, int s, int 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.
isValid()
.
public final void start()
QTime t = new QTime(); t.start(); some_lengthy_task(); System.err.println("Time elapsed: " +t.elapsed() + " ms");
restart()
, elapsed()
, and currentTime()
.
public final java.lang.String toString()
toString
in class java.lang.Object
public final java.lang.String toString(Qt.DateFormat f)
public final java.lang.String toString(java.lang.String format)
public static QTime currentTime()
Note that the accuracy depends on the accuracy of the underlying operating system; not all systems provide 1-millisecond accuracy.
public static QTime fromString(java.lang.String s)
QTime
using the format given, or an invalid time if this is not possible.
public static QTime fromString(java.lang.String s, Qt.DateFormat f)
QTime
using the format given, or an invalid time if this is not possible.
public static QTime fromString(java.lang.String s, java.lang.String format)
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:
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". |
QTime time = QTime.fromString("1mm12car00", "m'mm'hcarss"); // time is 12:01.00If 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"); // invalidAny 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
QDateTime::toString()
QTime::toString()
QDateTime::fromString()
, QDate::fromString()
, and QDate::toString()
.
public static boolean isValid(int h, int m, int s)
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
public static boolean isValid(int h, int m, int s, int ms)
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
public QTime clone()
clone
in class java.lang.Object
|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |