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| author | Timothy Pearson <[email protected]> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <[email protected]> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/qtime.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
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diff --git a/doc/html/qtime.html b/doc/html/qtime.html new file mode 100644 index 0000000..f793a97 --- /dev/null +++ b/doc/html/qtime.html @@ -0,0 +1,393 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/tools/qdatetime.cpp:1239 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>QTime Class</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QTime Class Reference</h1> + +<p>The QTime class provides clock time functions. +<a href="#details">More...</a> +<p>All the functions in this class are <a href="threads.html#reentrant">reentrant</a> when Qt is built with thread support.</p> +<p><tt>#include <<a href="qdatetime-h.html">qdatetime.h</a>></tt> +<p><a href="qtime-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn><a href="#QTime"><b>QTime</b></a> ()</li> +<li class=fn><a href="#QTime-2"><b>QTime</b></a> ( int h, int m, int s = 0, int ms = 0 )</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>int <a href="#hour"><b>hour</b></a> () const</li> +<li class=fn>int <a href="#minute"><b>minute</b></a> () const</li> +<li class=fn>int <a href="#second"><b>second</b></a> () const</li> +<li class=fn>int <a href="#msec"><b>msec</b></a> () const</li> +<li class=fn>QString <a href="#toString-2"><b>toString</b></a> ( Qt::DateFormat f = Qt::TextDate ) const</li> +<li class=fn>QString <a href="#toString"><b>toString</b></a> ( const QString & format ) const</li> +<li class=fn>bool <a href="#setHMS"><b>setHMS</b></a> ( int h, int m, int s, int ms = 0 )</li> +<li class=fn>QTime <a href="#addSecs"><b>addSecs</b></a> ( int nsecs ) const</li> +<li class=fn>int <a href="#secsTo"><b>secsTo</b></a> ( const QTime & t ) const</li> +<li class=fn>QTime <a href="#addMSecs"><b>addMSecs</b></a> ( int ms ) const</li> +<li class=fn>int <a href="#msecsTo"><b>msecsTo</b></a> ( const QTime & t ) const</li> +<li class=fn>bool <a href="#operator-eq-eq"><b>operator==</b></a> ( const QTime & t ) const</li> +<li class=fn>bool <a href="#operator!-eq"><b>operator!=</b></a> ( const QTime & t ) const</li> +<li class=fn>bool <a href="#operator-lt"><b>operator<</b></a> ( const QTime & t ) const</li> +<li class=fn>bool <a href="#operator-lt-eq"><b>operator<=</b></a> ( const QTime & t ) const</li> +<li class=fn>bool <a href="#operator-gt"><b>operator></b></a> ( const QTime & t ) const</li> +<li class=fn>bool <a href="#operator-gt-eq"><b>operator>=</b></a> ( const QTime & t ) const</li> +<li class=fn>void <a href="#start"><b>start</b></a> ()</li> +<li class=fn>int <a href="#restart"><b>restart</b></a> ()</li> +<li class=fn>int <a href="#elapsed"><b>elapsed</b></a> () const</li> +</ul> +<h2>Static Public Members</h2> +<ul> +<li class=fn>QTime <a href="#currentTime-2"><b>currentTime</b></a> ()</li> +<li class=fn>QTime <a href="#currentTime"><b>currentTime</b></a> ( Qt::TimeSpec ts )</li> +<li class=fn>QTime <a href="#fromString"><b>fromString</b></a> ( const QString & s, Qt::DateFormat f = Qt::TextDate )</li> +<li class=fn>bool <a href="#isValid-2"><b>isValid</b></a> ( int h, int m, int s, int ms = 0 )</li> +</ul> +<h2>Related Functions</h2> +<ul> +<li class=fn>QDataStream & <a href="#operator-lt-lt"><b>operator<<</b></a> ( QDataStream & s, const QTime & t )</li> +<li class=fn>QDataStream & <a href="#operator-gt-gt"><b>operator>></b></a> ( QDataStream & s, QTime & t )</li> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + + +<p> The QTime class provides clock time functions. +<p> + +<p> 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. +<p> 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. +<p> A QTime object is typically created either by giving the number of +hours, minutes, seconds, and milliseconds explicitly, or by using +the static function <a href="#currentTime">currentTime</a>(), 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. +<p> The <a href="#hour">hour</a>(), <a href="#minute">minute</a>(), <a href="#second">second</a>(), and <a href="#msec">msec</a>() 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 <a href="#toString">toString</a>() function. +<p> 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. +<p> The time a given number of seconds or milliseconds later than a +given time can be found using the <a href="#addSecs">addSecs</a>() or <a href="#addMSecs">addMSecs</a>() +functions. Correspondingly, the number of (milli)seconds between +two times can be found using the <a href="#secsTo">secsTo</a>() or <a href="#msecsTo">msecsTo</a>() functions. +<p> QTime can be used to measure a span of elapsed time using the +<a href="#start">start</a>(), <a href="#restart">restart</a>(), and <a href="#elapsed">elapsed</a>() functions. +<p> <p>See also <a href="qdate.html">QDate</a>, <a href="qdatetime.html">QDateTime</a>, and <a href="time.html">Time and Date</a>. + +<hr><h2>Member Function Documentation</h2> +<h3 class=fn><a name="QTime"></a>QTime::QTime () +</h3> + +<p> Constructs the time 0 hours, minutes, seconds and milliseconds, +i.e. 00:00:00.000 (midnight). This is a valid time. +<p> <p>See also <a href="#isValid">isValid</a>(). + +<h3 class=fn><a name="QTime-2"></a>QTime::QTime ( int h, int m, int s = 0, int ms = 0 ) +</h3> +Constructs a time with hour <em>h</em>, minute <em>m</em>, seconds <em>s</em> and +milliseconds <em>ms</em>. +<p> <em>h</em> must be in the range 0..23, <em>m</em> and <em>s</em> must be in the +range 0..59, and <em>ms</em> must be in the range 0..999. +<p> <p>See also <a href="#isValid">isValid</a>(). + +<h3 class=fn><a href="qtime.html">QTime</a> <a name="addMSecs"></a>QTime::addMSecs ( int ms ) const +</h3> +Returns a QTime object containing a time <em>ms</em> milliseconds later +than the time of this object (or earlier if <em>ms</em> is negative). +<p> Note that the time will wrap if it passes midnight. See <a href="#addSecs">addSecs</a>() +for an example. +<p> <p>See also <a href="#addSecs">addSecs</a>() and <a href="#msecsTo">msecsTo</a>(). + +<h3 class=fn><a href="qtime.html">QTime</a> <a name="addSecs"></a>QTime::addSecs ( int nsecs ) const +</h3> +Returns a QTime object containing a time <em>nsecs</em> seconds later +than the time of this object (or earlier if <em>nsecs</em> is negative). +<p> Note that the time will wrap if it passes midnight. +<p> Example: +<pre> + QTime n( 14, 0, 0 ); // n == 14:00:00 + QTime t; + t = n.<a href="#addSecs">addSecs</a>( 70 ); // t == 14:01:10 + t = n.<a href="#addSecs">addSecs</a>( -70 ); // t == 13:58:50 + t = n.<a href="#addSecs">addSecs</a>( 10*60*60 + 5 ); // t == 00:00:05 + t = n.<a href="#addSecs">addSecs</a>( -15*60*60 ); // t == 23:00:00 + </pre> + +<p> <p>See also <a href="#addMSecs">addMSecs</a>(), <a href="#secsTo">secsTo</a>(), and <a href="qdatetime.html#addSecs">QDateTime::addSecs</a>(). + +<h3 class=fn><a href="qtime.html">QTime</a> <a name="currentTime"></a>QTime::currentTime ( <a href="qt.html#TimeSpec-enum">Qt::TimeSpec</a> ts )<tt> [static]</tt> +</h3> +Returns the current time as reported by the system clock, for the +TimeSpec <em>ts</em>. The default TimeSpec is LocalTime. +<p> Note that the accuracy depends on the accuracy of the underlying +operating system; not all systems provide 1-millisecond accuracy. +<p> <p>See also <a href="qt.html#TimeSpec-enum">Qt::TimeSpec</a>. + +<p>Examples: <a href="aclock-example.html#x1201">aclock/aclock.cpp</a>, <a href="dclock-example.html#x1104">dclock/dclock.cpp</a>, <a href="tutorial1-12.html#x2398">t12/cannon.cpp</a>, and <a href="tictac-example.html#x40">tictac/tictac.cpp</a>. +<h3 class=fn><a href="qtime.html">QTime</a> <a name="currentTime-2"></a>QTime::currentTime ()<tt> [static]</tt> +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Returns the current time as reported by the system clock. +<p> Note that the accuracy depends on the accuracy of the underlying +operating system; not all systems provide 1-millisecond accuracy. + +<h3 class=fn>int <a name="elapsed"></a>QTime::elapsed () const +</h3> +Returns the number of milliseconds that have elapsed since the +last time <a href="#start">start</a>() or <a href="#restart">restart</a>() was called. +<p> Note that the counter wraps to zero 24 hours after the last call +to start() or restart. +<p> Note that the accuracy depends on the accuracy of the underlying +operating system; not all systems provide 1-millisecond accuracy. +<p> <b>Warning:</b> 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. +<p> <p>See also <a href="#start">start</a>() and <a href="#restart">restart</a>(). + +<h3 class=fn><a href="qtime.html">QTime</a> <a name="fromString"></a>QTime::fromString ( const <a href="qstring.html">QString</a> & s, <a href="qt.html#DateFormat-enum">Qt::DateFormat</a> f = Qt::TextDate )<tt> [static]</tt> +</h3> +Returns the representation <em>s</em> as a QTime using the format <em>f</em>, +or an invalid time if this is not possible. +<p> <b>Warning:</b> Note that <a href="qt.html#DateFormat-enum">Qt::LocalDate</a> cannot be used here. + +<h3 class=fn>int <a name="hour"></a>QTime::hour () const +</h3> +Returns the hour part (0..23) of the time. + +<p>Examples: <a href="aclock-example.html#x1202">aclock/aclock.cpp</a> and <a href="tictac-example.html#x41">tictac/tictac.cpp</a>. +<h3 class=fn>bool <a name="isNull"></a>QTime::isNull () const +</h3> + +<p> Returns TRUE if the time is equal to 00:00:00.000; otherwise +returns FALSE. A null time is valid. +<p> <p>See also <a href="#isValid">isValid</a>(). + +<h3 class=fn>bool <a name="isValid"></a>QTime::isValid () const +</h3> +Returns TRUE if the time is valid; otherwise returns FALSE. The +time 23:30:55.746 is valid, whereas 24:12:30 is invalid. +<p> <p>See also <a href="#isNull">isNull</a>(). + +<h3 class=fn>bool <a name="isValid-2"></a>QTime::isValid ( int h, int m, int s, int ms = 0 )<tt> [static]</tt> +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Returns TRUE if the specified time is valid; otherwise returns +FALSE. +<p> The time is valid if <em>h</em> is in the range 0..23, <em>m</em> and <em>s</em> are +in the range 0..59, and <em>ms</em> is in the range 0..999. +<p> Example: +<pre> + QTime::<a href="#isValid">isValid</a>(21, 10, 30); // returns TRUE + QTime::<a href="#isValid">isValid</a>(22, 5, 62); // returns FALSE + </pre> + + +<h3 class=fn>int <a name="minute"></a>QTime::minute () const +</h3> +Returns the minute part (0..59) of the time. + +<p>Examples: <a href="aclock-example.html#x1203">aclock/aclock.cpp</a> and <a href="tictac-example.html#x42">tictac/tictac.cpp</a>. +<h3 class=fn>int <a name="msec"></a>QTime::msec () const +</h3> +Returns the millisecond part (0..999) of the time. + +<h3 class=fn>int <a name="msecsTo"></a>QTime::msecsTo ( const <a href="qtime.html">QTime</a> & t ) const +</h3> +Returns the number of milliseconds from this time to <em>t</em> (which +is negative if <em>t</em> is earlier than this time). +<p> Because QTime measures time within a day and there are 86400 +seconds in a day, the result is always between -86400000 and +86400000 msec. +<p> <p>See also <a href="#secsTo">secsTo</a>(). + +<h3 class=fn>bool <a name="operator!-eq"></a>QTime::operator!= ( const <a href="qtime.html">QTime</a> & t ) const +</h3> + +<p> Returns TRUE if this time is different from <em>t</em>; otherwise returns FALSE. + +<h3 class=fn>bool <a name="operator-lt"></a>QTime::operator< ( const <a href="qtime.html">QTime</a> & t ) const +</h3> + +<p> Returns TRUE if this time is earlier than <em>t</em>; otherwise returns FALSE. + +<h3 class=fn>bool <a name="operator-lt-eq"></a>QTime::operator<= ( const <a href="qtime.html">QTime</a> & t ) const +</h3> + +<p> Returns TRUE if this time is earlier than or equal to <em>t</em>; +otherwise returns FALSE. + +<h3 class=fn>bool <a name="operator-eq-eq"></a>QTime::operator== ( const <a href="qtime.html">QTime</a> & t ) const +</h3> + +<p> Returns TRUE if this time is equal to <em>t</em>; otherwise returns FALSE. + +<h3 class=fn>bool <a name="operator-gt"></a>QTime::operator> ( const <a href="qtime.html">QTime</a> & t ) const +</h3> + +<p> Returns TRUE if this time is later than <em>t</em>; otherwise returns FALSE. + +<h3 class=fn>bool <a name="operator-gt-eq"></a>QTime::operator>= ( const <a href="qtime.html">QTime</a> & t ) const +</h3> + +<p> Returns TRUE if this time is later than or equal to <em>t</em>; +otherwise returns FALSE. + +<h3 class=fn>int <a name="restart"></a>QTime::restart () +</h3> +Sets this time to the current time and returns the number of +milliseconds that have elapsed since the last time <a href="#start">start</a>() or +<a href="#restart">restart</a>() was called. +<p> This function is guaranteed to be atomic and is thus very handy +for repeated measurements. Call start() to start the first +measurement and then restart() for each later measurement. +<p> Note that the counter wraps to zero 24 hours after the last call +to start() or restart(). +<p> <b>Warning:</b> 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. +<p> <p>See also <a href="#start">start</a>(), <a href="#elapsed">elapsed</a>(), and <a href="#currentTime">currentTime</a>(). + +<h3 class=fn>int <a name="second"></a>QTime::second () const +</h3> +Returns the second part (0..59) of the time. + +<p>Example: <a href="tictac-example.html#x43">tictac/tictac.cpp</a>. +<h3 class=fn>int <a name="secsTo"></a>QTime::secsTo ( const <a href="qtime.html">QTime</a> & t ) const +</h3> +Returns the number of seconds from this time to <em>t</em> (which is +negative if <em>t</em> is earlier than this time). +<p> Because QTime measures time within a day and there are 86400 +seconds in a day, the result is always between -86400 and 86400. +<p> <p>See also <a href="#addSecs">addSecs</a>() and <a href="qdatetime.html#secsTo">QDateTime::secsTo</a>(). + +<p>Example: <a href="tutorial1-12.html#x2399">t12/cannon.cpp</a>. +<h3 class=fn>bool <a name="setHMS"></a>QTime::setHMS ( int h, int m, int s, int ms = 0 ) +</h3> +Sets the time to hour <em>h</em>, minute <em>m</em>, seconds <em>s</em> and +milliseconds <em>ms</em>. +<p> <em>h</em> must be in the range 0..23, <em>m</em> and <em>s</em> must be in the +range 0..59, and <em>ms</em> must be in the range 0..999. Returns TRUE +if the set time is valid; otherwise returns FALSE. +<p> <p>See also <a href="#isValid">isValid</a>(). + +<h3 class=fn>void <a name="start"></a>QTime::start () +</h3> +Sets this time to the current time. This is practical for timing: +<p> <pre> + QTime t; + t.<a href="#start">start</a>(); + some_lengthy_task(); + <a href="qapplication.html#qDebug">qDebug</a>( "Time elapsed: %d ms", t.<a href="#elapsed">elapsed</a>() ); + </pre> + +<p> <p>See also <a href="#restart">restart</a>(), <a href="#elapsed">elapsed</a>(), and <a href="#currentTime">currentTime</a>(). + +<h3 class=fn><a href="qstring.html">QString</a> <a name="toString"></a>QTime::toString ( const <a href="qstring.html">QString</a> & format ) const +</h3> +Returns the time as a string. The <em>format</em> parameter determines +the format of the result string. +<p> These expressions may be used: +<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 (assuming that the QTime is 14:13:09.042) +<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">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 time is an invalid time, then <a href="qstring.html#QString-null">QString::null</a> will be returned. +<p> <p>See also <a href="qdate.html#toString">QDate::toString</a>() and <a href="qdatetime.html#toString">QDateTime::toString</a>(). + +<h3 class=fn><a href="qstring.html">QString</a> <a name="toString-2"></a>QTime::toString ( <a href="qt.html#DateFormat-enum">Qt::DateFormat</a> f = Qt::TextDate ) const +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Returns the time as a string. Milliseconds are not included. The +<em>f</em> parameter determines the format of the string. +<p> If <em>f</em> is <a href="qt.html#DateFormat-enum">Qt::TextDate</a>, the string format is HH:MM:SS; e.g. 1 +second before midnight would be "23:59:59". +<p> If <em>f</em> is <a href="qt.html#DateFormat-enum">Qt::ISODate</a>, the string format corresponds to the +ISO 8601 extended specification for representations of dates, +which is also HH:MM:SS. +<p> If <em>f</em> is Qt::LocalDate, the string format depends on the locale +settings of the system. +<p> If the time is an invalid time, then <a href="qstring.html#QString-null">QString::null</a> will be returned. + +<hr><h2>Related Functions</h2> +<h3 class=fn><a href="qdatastream.html">QDataStream</a> & <a name="operator-lt-lt"></a>operator<< ( <a href="qdatastream.html">QDataStream</a> & s, const <a href="qtime.html">QTime</a> & t ) +</h3> + +<p> Writes time <em>t</em> to the stream <em>s</em>. +<p> <p>See also <a href="datastreamformat.html">Format of the QDataStream operators</a>. + +<h3 class=fn><a href="qdatastream.html">QDataStream</a> & <a name="operator-gt-gt"></a>operator>> ( <a href="qdatastream.html">QDataStream</a> & s, <a href="qtime.html">QTime</a> & t ) +</h3> + +<p> Reads a time from the stream <em>s</em> into <em>t</em>. +<p> <p>See also <a href="datastreamformat.html">Format of the QDataStream operators</a>. + +<!-- eof --> +<hr><p> +This file is part of the <a href="index.html">Qt toolkit</a>. +Copyright © 1995-2007 +<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |