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| 30 | <font color="#004faf">Functions</font></a>
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| 31 | </td>
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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QDate Class Reference</h1>
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| 33 |
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| 34 | <p>The QDate class provides date functions.
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| 35 | <a href="#details">More...</a>
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| 36 | <p>All the functions in this class are <a href="threads.html#reentrant">reentrant</a> when Qt is built with thread support.</p>
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| 37 | <p><tt>#include <<a href="qdatetime-h.html">qdatetime.h</a>></tt>
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| 38 | <p><a href="qdate-members.html">List of all member functions.</a>
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| 39 | <h2>Public Members</h2>
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| 40 | <ul>
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| 41 | <li class=fn><a href="#QDate"><b>QDate</b></a> ()</li>
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| 42 | <li class=fn><a href="#QDate-2"><b>QDate</b></a> ( int y, int m, int d )</li>
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| 43 | <li class=fn>bool <a href="#isNull"><b>isNull</b></a> () const</li>
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| 44 | <li class=fn>bool <a href="#isValid"><b>isValid</b></a> () const</li>
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| 45 | <li class=fn>int <a href="#year"><b>year</b></a> () const</li>
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| 46 | <li class=fn>int <a href="#month"><b>month</b></a> () const</li>
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| 47 | <li class=fn>int <a href="#day"><b>day</b></a> () const</li>
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| 48 | <li class=fn>int <a href="#dayOfWeek"><b>dayOfWeek</b></a> () const</li>
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| 49 | <li class=fn>int <a href="#dayOfYear"><b>dayOfYear</b></a> () const</li>
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| 50 | <li class=fn>int <a href="#daysInMonth"><b>daysInMonth</b></a> () const</li>
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| 51 | <li class=fn>int <a href="#daysInYear"><b>daysInYear</b></a> () const</li>
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| 52 | <li class=fn>int <a href="#weekNumber"><b>weekNumber</b></a> ( int * yearNumber = 0 ) const</li>
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| 53 | <li class=fn>QString <a href="#toString-2"><b>toString</b></a> ( Qt::DateFormat f = Qt::TextDate ) const</li>
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| 54 | <li class=fn>QString <a href="#toString"><b>toString</b></a> ( const QString & format ) const</li>
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| 55 | <li class=fn>bool <a href="#setYMD"><b>setYMD</b></a> ( int y, int m, int d )</li>
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| 56 | <li class=fn>QDate <a href="#addDays"><b>addDays</b></a> ( int ndays ) const</li>
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| 57 | <li class=fn>QDate <a href="#addMonths"><b>addMonths</b></a> ( int nmonths ) const</li>
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| 58 | <li class=fn>QDate <a href="#addYears"><b>addYears</b></a> ( int nyears ) const</li>
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| 59 | <li class=fn>int <a href="#daysTo"><b>daysTo</b></a> ( const QDate & d ) const</li>
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| 60 | <li class=fn>bool <a href="#operator-eq-eq"><b>operator==</b></a> ( const QDate & d ) const</li>
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| 61 | <li class=fn>bool <a href="#operator!-eq"><b>operator!=</b></a> ( const QDate & d ) const</li>
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| 62 | <li class=fn>bool <a href="#operator-lt"><b>operator<</b></a> ( const QDate & d ) const</li>
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| 63 | <li class=fn>bool <a href="#operator-lt-eq"><b>operator<=</b></a> ( const QDate & d ) const</li>
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| 64 | <li class=fn>bool <a href="#operator-gt"><b>operator></b></a> ( const QDate & d ) const</li>
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| 65 | <li class=fn>bool <a href="#operator-gt-eq"><b>operator>=</b></a> ( const QDate & d ) const</li>
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| 66 | </ul>
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| 67 | <h2>Static Public Members</h2>
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| 68 | <ul>
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| 69 | <li class=fn>QString monthName ( int month ) <em>(obsolete)</em></li>
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| 70 | <li class=fn>QString dayName ( int weekday ) <em>(obsolete)</em></li>
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| 71 | <li class=fn>QString <a href="#shortMonthName"><b>shortMonthName</b></a> ( int month )</li>
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| 72 | <li class=fn>QString <a href="#shortDayName"><b>shortDayName</b></a> ( int weekday )</li>
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| 73 | <li class=fn>QString <a href="#longMonthName"><b>longMonthName</b></a> ( int month )</li>
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| 74 | <li class=fn>QString <a href="#longDayName"><b>longDayName</b></a> ( int weekday )</li>
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| 75 | <li class=fn>QDate <a href="#currentDate-2"><b>currentDate</b></a> ()</li>
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| 76 | <li class=fn>QDate <a href="#currentDate"><b>currentDate</b></a> ( Qt::TimeSpec ts )</li>
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| 77 | <li class=fn>QDate <a href="#fromString"><b>fromString</b></a> ( const QString & s, Qt::DateFormat f = Qt::TextDate )</li>
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| 78 | <li class=fn>bool <a href="#isValid-2"><b>isValid</b></a> ( int y, int m, int d )</li>
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| 79 | <li class=fn>bool <a href="#leapYear"><b>leapYear</b></a> ( int y )</li>
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| 80 | </ul>
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| 81 | <h2>Related Functions</h2>
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| 82 | <ul>
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| 83 | <li class=fn>QDataStream & <a href="#operator-lt-lt"><b>operator<<</b></a> ( QDataStream & s, const QDate & d )</li>
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| 84 | <li class=fn>QDataStream & <a href="#operator-gt-gt"><b>operator>></b></a> ( QDataStream & s, QDate & d )</li>
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| 85 | </ul>
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| 86 | <hr><a name="details"></a><h2>Detailed Description</h2>
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| 87 |
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| 88 |
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| 89 |
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| 90 | The QDate class provides date functions.
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| 91 | <p>
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| 92 |
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| 93 | <p> A QDate object contains a calendar date, i.e. year, month, and day
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| 94 | numbers, in the modern Western (Gregorian) calendar. It can read
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| 95 | the current date from the system clock. It provides functions for
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| 96 | comparing dates and for manipulating dates, e.g. by adding a
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| 97 | number of days or months or years.
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| 98 | <p> A QDate object is typically created either by giving the year,
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| 99 | month and day numbers explicitly, or by using the static function
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| 100 | <a href="#currentDate">currentDate</a>(), which creates a QDate object containing the system
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| 101 | clock's date. An explicit date can also be set using <a href="#setYMD">setYMD</a>(). The
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| 102 | <a href="#fromString">fromString</a>() function returns a QDate given a string and a date
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| 103 | format which is used to interpret the date within the string.
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| 104 | <p> The <a href="#year">year</a>(), <a href="#month">month</a>(), and <a href="#day">day</a>() functions provide access to the
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| 105 | year, month, and day numbers. Also, <a href="#dayOfWeek">dayOfWeek</a>() and <a href="#dayOfYear">dayOfYear</a>()
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| 106 | functions are provided. The same information is provided in
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| 107 | textual format by the <a href="#toString">toString</a>(), <a href="#shortDayName">shortDayName</a>(), <a href="#longDayName">longDayName</a>(),
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| 108 | <a href="#shortMonthName">shortMonthName</a>() and <a href="#longMonthName">longMonthName</a>() functions.
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| 109 | <p> QDate provides a full set of operators to compare two QDate
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| 110 | objects where smaller means earlier and larger means later.
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| 111 | <p> You can increment (or decrement) a date by a given number of days
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| 112 | using <a href="#addDays">addDays</a>(). Similarly you can use <a href="#addMonths">addMonths</a>() and <a href="#addYears">addYears</a>().
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| 113 | The <a href="#daysTo">daysTo</a>() function returns the number of days between two
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| 114 | dates.
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| 115 | <p> The <a href="#daysInMonth">daysInMonth</a>() and <a href="#daysInYear">daysInYear</a>() functions return how many days
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| 116 | there are in this date's month and year, respectively. The
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| 117 | <a href="#leapYear">leapYear</a>() function indicates whether this date is in a leap year.
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| 118 | <p> Note that QDate should not be used for date calculations for dates
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| 119 | prior to the introduction of the Gregorian calendar. This calendar
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| 120 | was adopted by England from the 14<sup><small>th</small></sup>
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| 121 | September 1752 (hence this is the earliest valid QDate), and
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| 122 | subsequently by most other Western countries, until 1923.
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| 123 | <p> The end of time is reached around the year 8000, by which time we
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| 124 | expect Qt to be obsolete.
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| 125 | <p> <p>See also <a href="qtime.html">QTime</a>, <a href="qdatetime.html">QDateTime</a>, <a href="qdateedit.html">QDateEdit</a>, <a href="qdatetimeedit.html">QDateTimeEdit</a>, and <a href="time.html">Time and Date</a>.
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| 126 |
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| 127 | <hr><h2>Member Function Documentation</h2>
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| 128 | <h3 class=fn><a name="QDate"></a>QDate::QDate ()
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| 129 | </h3>
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| 130 |
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| 131 | <p> Constructs a null date. Null dates are invalid.
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| 132 | <p> <p>See also <a href="#isNull">isNull</a>() and <a href="#isValid">isValid</a>().
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| 133 |
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| 134 | <h3 class=fn><a name="QDate-2"></a>QDate::QDate ( int y, int m, int d )
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| 135 | </h3>
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| 136 | Constructs a date with year <em>y</em>, month <em>m</em> and day <em>d</em>.
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| 137 | <p> <em>y</em> must be in the range 1752..8000, <em>m</em> must be in the range
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| 138 | 1..12, and <em>d</em> must be in the range 1..31.
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| 139 | <p> <b>Warning:</b> If <em>y</em> is in the range 0..99, it is interpreted as
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| 140 | 1900..1999.
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| 141 | <p> <p>See also <a href="#isValid">isValid</a>().
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| 142 |
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| 143 | <h3 class=fn><a href="qdate.html">QDate</a> <a name="addDays"></a>QDate::addDays ( int ndays ) const
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| 144 | </h3>
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| 145 | Returns a QDate object containing a date <em>ndays</em> later than the
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| 146 | date of this object (or earlier if <em>ndays</em> is negative).
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| 147 | <p> <p>See also <a href="#addMonths">addMonths</a>(), <a href="#addYears">addYears</a>(), and <a href="#daysTo">daysTo</a>().
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| 148 |
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| 149 | <h3 class=fn><a href="qdate.html">QDate</a> <a name="addMonths"></a>QDate::addMonths ( int nmonths ) const
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| 150 | </h3>
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| 151 | Returns a QDate object containing a date <em>nmonths</em> later than the
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| 152 | date of this object (or earlier if <em>nmonths</em> is negative).
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| 153 | <p> <p>See also <a href="#addDays">addDays</a>() and <a href="#addYears">addYears</a>().
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| 154 |
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| 155 | <h3 class=fn><a href="qdate.html">QDate</a> <a name="addYears"></a>QDate::addYears ( int nyears ) const
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| 156 | </h3>
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| 157 | Returns a QDate object containing a date <em>nyears</em> later than the
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| 158 | date of this object (or earlier if <em>nyears</em> is negative).
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| 159 | <p> <p>See also <a href="#addDays">addDays</a>() and <a href="#addMonths">addMonths</a>().
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| 160 |
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| 161 | <h3 class=fn><a href="qdate.html">QDate</a> <a name="currentDate"></a>QDate::currentDate ( <a href="qt.html#TimeSpec-enum">Qt::TimeSpec</a> ts )<tt> [static]</tt>
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| 162 | </h3>
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| 163 | Returns the current date, as reported by the system clock, for the
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| 164 | TimeSpec <em>ts</em>. The default TimeSpec is LocalTime.
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| 165 | <p> <p>See also <a href="qtime.html#currentTime">QTime::currentTime</a>(), <a href="qdatetime.html#currentDateTime">QDateTime::currentDateTime</a>(), and <a href="qt.html#TimeSpec-enum">Qt::TimeSpec</a>.
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| 166 |
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| 167 | <p>Example: <a href="dclock-example.html#x1098">dclock/dclock.cpp</a>.
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| 168 | <h3 class=fn><a href="qdate.html">QDate</a> <a name="currentDate-2"></a>QDate::currentDate ()<tt> [static]</tt>
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| 169 | </h3>
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| 170 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 171 | <p> Returns the current date, as reported by the system clock.
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| 172 | <p> <p>See also <a href="qtime.html#currentTime">QTime::currentTime</a>() and <a href="qdatetime.html#currentDateTime">QDateTime::currentDateTime</a>().
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| 173 |
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| 174 | <h3 class=fn>int <a name="day"></a>QDate::day () const
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| 175 | </h3>
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| 176 | Returns the day of the month (1..31) of this date.
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| 177 | <p> <p>See also <a href="#year">year</a>(), <a href="#month">month</a>(), and <a href="#dayOfWeek">dayOfWeek</a>().
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| 178 |
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| 179 | <p>Example: <a href="dclock-example.html#x1099">dclock/dclock.cpp</a>.
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| 180 | <h3 class=fn><a href="qstring.html">QString</a> <a name="dayName"></a>QDate::dayName ( int weekday )<tt> [static]</tt>
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| 181 | </h3>
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| 182 |
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| 183 | <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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| 184 | <p> Use <a href="#shortDayName">shortDayName</a>() instead.
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| 185 |
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| 186 | <h3 class=fn>int <a name="dayOfWeek"></a>QDate::dayOfWeek () const
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| 187 | </h3>
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| 188 | Returns the weekday (Monday=1..Sunday=7) for this date.
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| 189 | <p> <p>See also <a href="#day">day</a>() and <a href="#dayOfYear">dayOfYear</a>().
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| 190 |
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| 191 | <h3 class=fn>int <a name="dayOfYear"></a>QDate::dayOfYear () const
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| 192 | </h3>
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| 193 | Returns the day of the year (1..365) for this date.
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| 194 | <p> <p>See also <a href="#day">day</a>() and <a href="#dayOfWeek">dayOfWeek</a>().
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| 195 |
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| 196 | <h3 class=fn>int <a name="daysInMonth"></a>QDate::daysInMonth () const
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| 197 | </h3>
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| 198 | Returns the number of days in the month (28..31) for this date.
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| 199 | <p> <p>See also <a href="#day">day</a>() and <a href="#daysInYear">daysInYear</a>().
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| 200 |
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| 201 | <h3 class=fn>int <a name="daysInYear"></a>QDate::daysInYear () const
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| 202 | </h3>
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| 203 | Returns the number of days in the year (365 or 366) for this date.
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| 204 | <p> <p>See also <a href="#day">day</a>() and <a href="#daysInMonth">daysInMonth</a>().
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| 205 |
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| 206 | <h3 class=fn>int <a name="daysTo"></a>QDate::daysTo ( const <a href="qdate.html">QDate</a> & d ) const
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| 207 | </h3>
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| 208 | Returns the number of days from this date to <em>d</em> (which is
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| 209 | negative if <em>d</em> is earlier than this date).
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| 210 | <p> Example:
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| 211 | <pre>
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| 212 | QDate d1( 1995, 5, 17 ); // May 17th 1995
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| 213 | QDate d2( 1995, 5, 20 ); // May 20th 1995
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| 214 | d1.<a href="#daysTo">daysTo</a>( d2 ); // returns 3
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| 215 | d2.<a href="#daysTo">daysTo</a>( d1 ); // returns -3
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| 216 | </pre>
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| 217 |
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| 218 | <p> <p>See also <a href="#addDays">addDays</a>().
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| 219 |
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| 220 | <h3 class=fn><a href="qdate.html">QDate</a> <a name="fromString"></a>QDate::fromString ( const <a href="qstring.html">QString</a> & s, <a href="qt.html#DateFormat-enum">Qt::DateFormat</a> f = Qt::TextDate )<tt> [static]</tt>
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| 221 | </h3>
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| 222 | Returns the QDate represented by the string <em>s</em>, using the format
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| 223 | <em>f</em>, or an invalid date if the string cannot be parsed.
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| 224 | <p> Note for <a href="qt.html#DateFormat-enum">Qt::TextDate</a>: It is recommended that you use the
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| 225 | English short month names (e.g. "Jan"). Although localized month
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| 226 | names can also be used, they depend on the user's locale settings.
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| 227 | <p> <b>Warning:</b> <a href="qt.html#DateFormat-enum">Qt::LocalDate</a> cannot be used here.
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| 228 |
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| 229 | <h3 class=fn>bool <a name="isNull"></a>QDate::isNull () const
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| 230 | </h3>
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| 231 |
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| 232 | <p> Returns TRUE if the date is null; otherwise returns FALSE. A null
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| 233 | date is invalid.
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| 234 | <p> <p>See also <a href="#isValid">isValid</a>().
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| 235 |
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| 236 | <h3 class=fn>bool <a name="isValid"></a>QDate::isValid () const
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| 237 | </h3>
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| 238 | Returns TRUE if this date is valid; otherwise returns FALSE.
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| 239 | <p> <p>See also <a href="#isNull">isNull</a>().
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| 240 |
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| 241 | <h3 class=fn>bool <a name="isValid-2"></a>QDate::isValid ( int y, int m, int d )<tt> [static]</tt>
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| 242 | </h3>
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| 243 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 244 | <p> Returns TRUE if the specified date (year <em>y</em>, month <em>m</em> and day
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| 245 | <em>d</em>) is valid; otherwise returns FALSE.
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| 246 | <p> Example:
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| 247 | <pre>
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| 248 | QDate::<a href="#isValid">isValid</a>( 2002, 5, 17 ); // TRUE May 17th 2002 is valid
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| 249 | QDate::<a href="#isValid">isValid</a>( 2002, 2, 30 ); // FALSE Feb 30th does not exist
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| 250 | QDate::<a href="#isValid">isValid</a>( 2004, 2, 29 ); // TRUE 2004 is a leap year
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| 251 | QDate::<a href="#isValid">isValid</a>( 1202, 6, 6 ); // FALSE 1202 is pre-Gregorian
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| 252 | </pre>
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| 253 |
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| 254 | <p> <b>Warning:</b> A <em>y</em> value in the range 00..99 is interpreted as
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| 255 | 1900..1999.
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| 256 | <p> <p>See also <a href="#isNull">isNull</a>() and <a href="#setYMD">setYMD</a>().
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| 257 |
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| 258 | <h3 class=fn>bool <a name="leapYear"></a>QDate::leapYear ( int y )<tt> [static]</tt>
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| 259 | </h3>
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| 260 | Returns TRUE if the specified year <em>y</em> is a leap year; otherwise
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| 261 | returns FALSE.
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| 262 |
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| 263 | <h3 class=fn><a href="qstring.html">QString</a> <a name="longDayName"></a>QDate::longDayName ( int weekday )<tt> [static]</tt>
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| 264 | </h3>
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| 265 | Returns the long name of the <em>weekday</em>.
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| 266 | <p> 1 = "Monday", 2 = "Tuesday", ... 7 = "Sunday"
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| 267 | <p> The day names will be localized according to the system's locale
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| 268 | settings.
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| 269 | <p> <p>See also <a href="#toString">toString</a>(), <a href="#shortDayName">shortDayName</a>(), <a href="#shortMonthName">shortMonthName</a>(), and <a href="#longMonthName">longMonthName</a>().
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| 270 |
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| 271 | <h3 class=fn><a href="qstring.html">QString</a> <a name="longMonthName"></a>QDate::longMonthName ( int month )<tt> [static]</tt>
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| 272 | </h3>
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| 273 | Returns the long name of the <em>month</em>.
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| 274 | <p> 1 = "January", 2 = "February", ... 12 = "December"
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| 275 | <p> The month names will be localized according to the system's locale
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| 276 | settings.
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| 277 | <p> <p>See also <a href="#toString">toString</a>(), <a href="#shortMonthName">shortMonthName</a>(), <a href="#shortDayName">shortDayName</a>(), and <a href="#longDayName">longDayName</a>().
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| 278 |
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| 279 | <h3 class=fn>int <a name="month"></a>QDate::month () const
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| 280 | </h3>
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| 281 | Returns the month (January=1..December=12) of this date.
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| 282 | <p> <p>See also <a href="#year">year</a>() and <a href="#day">day</a>().
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| 283 |
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| 284 | <p>Example: <a href="dclock-example.html#x1100">dclock/dclock.cpp</a>.
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| 285 | <h3 class=fn><a href="qstring.html">QString</a> <a name="monthName"></a>QDate::monthName ( int month )<tt> [static]</tt>
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| 286 | </h3>
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| 287 |
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| 288 | <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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| 289 | <p> Use <a href="#shortMonthName">shortMonthName</a>() instead.
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| 290 |
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| 291 | <h3 class=fn>bool <a name="operator!-eq"></a>QDate::operator!= ( const <a href="qdate.html">QDate</a> & d ) const
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| 292 | </h3>
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| 293 |
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| 294 | <p> Returns TRUE if this date is different from <em>d</em>; otherwise returns FALSE.
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| 295 |
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| 296 | <h3 class=fn>bool <a name="operator-lt"></a>QDate::operator< ( const <a href="qdate.html">QDate</a> & d ) const
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| 297 | </h3>
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| 298 |
|
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| 299 | <p> Returns TRUE if this date is earlier than <em>d</em>, otherwise returns FALSE.
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| 300 |
|
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| 301 | <h3 class=fn>bool <a name="operator-lt-eq"></a>QDate::operator<= ( const <a href="qdate.html">QDate</a> & d ) const
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| 302 | </h3>
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| 303 |
|
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| 304 | <p> Returns TRUE if this date is earlier than or equal to <em>d</em>,
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| 305 | otherwise returns FALSE.
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| 306 |
|
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| 307 | <h3 class=fn>bool <a name="operator-eq-eq"></a>QDate::operator== ( const <a href="qdate.html">QDate</a> & d ) const
|
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| 308 | </h3>
|
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| 309 |
|
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| 310 | <p> Returns TRUE if this date is equal to <em>d</em>; otherwise returns FALSE.
|
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| 311 |
|
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| 312 | <h3 class=fn>bool <a name="operator-gt"></a>QDate::operator> ( const <a href="qdate.html">QDate</a> & d ) const
|
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| 313 | </h3>
|
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| 314 |
|
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| 315 | <p> Returns TRUE if this date is later than <em>d</em>, otherwise returns FALSE.
|
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| 316 |
|
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| 317 | <h3 class=fn>bool <a name="operator-gt-eq"></a>QDate::operator>= ( const <a href="qdate.html">QDate</a> & d ) const
|
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| 318 | </h3>
|
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| 319 |
|
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| 320 | <p> Returns TRUE if this date is later than or equal to <em>d</em>,
|
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| 321 | otherwise returns FALSE.
|
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| 322 |
|
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| 323 | <h3 class=fn>bool <a name="setYMD"></a>QDate::setYMD ( int y, int m, int d )
|
|---|
| 324 | </h3>
|
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| 325 | Sets the date's year <em>y</em>, month <em>m</em> and day <em>d</em>.
|
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| 326 | <p> <em>y</em> must be in the range 1752..8000, <em>m</em> must be in the range
|
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| 327 | 1..12, and <em>d</em> must be in the range 1..31.
|
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| 328 | <p> <b>Warning:</b> If <em>y</em> is in the range 0..99, it is interpreted as
|
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| 329 | 1900..1999.
|
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| 330 | <p> Returns TRUE if the date is valid; otherwise returns FALSE.
|
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| 331 |
|
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| 332 | <h3 class=fn><a href="qstring.html">QString</a> <a name="shortDayName"></a>QDate::shortDayName ( int weekday )<tt> [static]</tt>
|
|---|
| 333 | </h3>
|
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| 334 | Returns the name of the <em>weekday</em>.
|
|---|
| 335 | <p> 1 = "Mon", 2 = "Tue", ... 7 = "Sun"
|
|---|
| 336 | <p> The day names will be localized according to the system's locale
|
|---|
| 337 | settings.
|
|---|
| 338 | <p> <p>See also <a href="#toString">toString</a>(), <a href="#shortMonthName">shortMonthName</a>(), <a href="#longMonthName">longMonthName</a>(), and <a href="#longDayName">longDayName</a>().
|
|---|
| 339 |
|
|---|
| 340 | <h3 class=fn><a href="qstring.html">QString</a> <a name="shortMonthName"></a>QDate::shortMonthName ( int month )<tt> [static]</tt>
|
|---|
| 341 | </h3>
|
|---|
| 342 | Returns the name of the <em>month</em>.
|
|---|
| 343 | <p> 1 = "Jan", 2 = "Feb", ... 12 = "Dec"
|
|---|
| 344 | <p> The month names will be localized according to the system's locale
|
|---|
| 345 | settings.
|
|---|
| 346 | <p> <p>See also <a href="#toString">toString</a>(), <a href="#longMonthName">longMonthName</a>(), <a href="#shortDayName">shortDayName</a>(), and <a href="#longDayName">longDayName</a>().
|
|---|
| 347 |
|
|---|
| 348 | <h3 class=fn><a href="qstring.html">QString</a> <a name="toString"></a>QDate::toString ( const <a href="qstring.html">QString</a> & format ) const
|
|---|
| 349 | </h3>
|
|---|
| 350 | Returns the date as a string. The <em>format</em> parameter determines
|
|---|
| 351 | the format of the result string.
|
|---|
| 352 | <p> These expressions may be used:
|
|---|
| 353 | <p> <center><table cellpadding="4" cellspacing="2" border="0">
|
|---|
| 354 | <tr bgcolor="#a2c511"> <th valign="top">Expression <th valign="top">Output
|
|---|
| 355 | <tr bgcolor="#f0f0f0"> <td valign="top">d <td valign="top">the day as number without a leading zero (1-31)
|
|---|
| 356 | <tr bgcolor="#d0d0d0"> <td valign="top">dd <td valign="top">the day as number with a leading zero (01-31)
|
|---|
| 357 | <tr bgcolor="#f0f0f0"> <td valign="top">ddd
|
|---|
| 358 | <td valign="top">the abbreviated localized day name (e.g. 'Mon'..'Sun').
|
|---|
| 359 | Uses <a href="#shortDayName">QDate::shortDayName</a>().
|
|---|
| 360 | <tr bgcolor="#d0d0d0"> <td valign="top">dddd
|
|---|
| 361 | <td valign="top">the long localized day name (e.g. 'Monday'..'Sunday').
|
|---|
| 362 | Uses <a href="#longDayName">QDate::longDayName</a>().
|
|---|
| 363 | <tr bgcolor="#f0f0f0"> <td valign="top">M <td valign="top">the month as number without a leading zero (1-12)
|
|---|
| 364 | <tr bgcolor="#d0d0d0"> <td valign="top">MM <td valign="top">the month as number with a leading zero (01-12)
|
|---|
| 365 | <tr bgcolor="#f0f0f0"> <td valign="top">MMM
|
|---|
| 366 | <td valign="top">the abbreviated localized month name (e.g. 'Jan'..'Dec').
|
|---|
| 367 | Uses <a href="#shortMonthName">QDate::shortMonthName</a>().
|
|---|
| 368 | <tr bgcolor="#d0d0d0"> <td valign="top">MMMM
|
|---|
| 369 | <td valign="top">the long localized month name (e.g. 'January'..'December').
|
|---|
| 370 | Uses <a href="#longMonthName">QDate::longMonthName</a>().
|
|---|
| 371 | <tr bgcolor="#f0f0f0"> <td valign="top">yy <td valign="top">the year as two digit number (00-99)
|
|---|
| 372 | <tr bgcolor="#d0d0d0"> <td valign="top">yyyy <td valign="top">the year as four digit number (1752-8000)
|
|---|
| 373 | </table></center>
|
|---|
| 374 | <p> All other input characters will be ignored.
|
|---|
| 375 | <p> Example format strings (assuming that the QDate is the
|
|---|
| 376 | 20<sup><small>th</small></sup> July 1969):
|
|---|
| 377 | <center><table cellpadding="4" cellspacing="2" border="0">
|
|---|
| 378 | <tr bgcolor="#a2c511"> <th valign="top">Format <th valign="top">Result
|
|---|
| 379 | <tr bgcolor="#f0f0f0"> <td valign="top">dd.MM.yyyy <td valign="top" colspan="1" rowspan="1"> 20.07.1969
|
|---|
| 380 | <tr bgcolor="#d0d0d0"> <td valign="top">ddd MMMM d yy <td valign="top" colspan="1" rowspan="1"> Sun July 20 69
|
|---|
| 381 | </table></center>
|
|---|
| 382 | <p> If the date is an invalid date, then <a href="qstring.html#QString-null">QString::null</a> will be returned.
|
|---|
| 383 | <p> <p>See also <a href="qdatetime.html#toString">QDateTime::toString</a>() and <a href="qtime.html#toString">QTime::toString</a>().
|
|---|
| 384 |
|
|---|
| 385 | <p>
|
|---|
| 386 | <h3 class=fn><a href="qstring.html">QString</a> <a name="toString-2"></a>QDate::toString ( <a href="qt.html#DateFormat-enum">Qt::DateFormat</a> f = Qt::TextDate ) const
|
|---|
| 387 | </h3>
|
|---|
| 388 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|---|
| 389 | <p> Returns the date as a string. The <em>f</em> parameter determines the
|
|---|
| 390 | format of the string.
|
|---|
| 391 | <p> If <em>f</em> is <a href="qt.html#DateFormat-enum">Qt::TextDate</a>, the string format is "Sat May 20 1995"
|
|---|
| 392 | (using the <a href="#shortDayName">shortDayName</a>() and <a href="#shortMonthName">shortMonthName</a>() functions to
|
|---|
| 393 | generate the string, so the day and month names are locale
|
|---|
| 394 | specific).
|
|---|
| 395 | <p> If <em>f</em> is <a href="qt.html#DateFormat-enum">Qt::ISODate</a>, the string format corresponds to the
|
|---|
| 396 | ISO 8601 specification for representations of dates, which is
|
|---|
| 397 | YYYY-MM-DD where YYYY is the year, MM is the month of the year
|
|---|
| 398 | (between 01 and 12), and DD is the day of the month between 01 and
|
|---|
| 399 | 31.
|
|---|
| 400 | <p> If <em>f</em> is <a href="qt.html#DateFormat-enum">Qt::LocalDate</a>, the string format depends on the
|
|---|
| 401 | locale settings of the system.
|
|---|
| 402 | <p> If the date is an invalid date, then <a href="qstring.html#QString-null">QString::null</a> will be returned.
|
|---|
| 403 | <p> <p>See also <a href="#shortDayName">shortDayName</a>() and <a href="#shortMonthName">shortMonthName</a>().
|
|---|
| 404 |
|
|---|
| 405 | <h3 class=fn>int <a name="weekNumber"></a>QDate::weekNumber ( int * yearNumber = 0 ) const
|
|---|
| 406 | </h3>
|
|---|
| 407 | Returns the week number (1 to 53), and stores the year in <em>*yearNumber</em> unless <em>yearNumber</em> is null (the default).
|
|---|
| 408 | <p> Returns 0 if the date is invalid.
|
|---|
| 409 | <p> In accordance with ISO 8601, weeks start on Monday and the first
|
|---|
| 410 | Thursday of a year is always in week 1 of that year. Most years
|
|---|
| 411 | have 52 weeks, but some have 53.
|
|---|
| 412 | <p> <em>*yearNumber</em> is not always the same as <a href="#year">year</a>(). For example, 1
|
|---|
| 413 | January 2000 has week number 52 in the year 1999, and 31 December
|
|---|
| 414 | 2002 has week number 1 in the year 2003.
|
|---|
| 415 | <p>
|
|---|
| 416 | <p> Copyright (c) 1989 The Regents of the University of California.
|
|---|
| 417 | All rights reserved.
|
|---|
| 418 | <p> Redistribution and use in source and binary forms are permitted
|
|---|
| 419 | provided that the above copyright notice and this paragraph are
|
|---|
| 420 | duplicated in all such forms and that any documentation,
|
|---|
| 421 | advertising materials, and other materials related to such
|
|---|
| 422 | distribution and use acknowledge that the software was developed
|
|---|
| 423 | by the University of California, Berkeley. The name of the
|
|---|
| 424 | University may not be used to endorse or promote products derived
|
|---|
| 425 | from this software without specific prior written permission.
|
|---|
| 426 | THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
|---|
| 427 | IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
|---|
| 428 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|---|
| 429 | <p> <p>See also <a href="#isValid">isValid</a>().
|
|---|
| 430 |
|
|---|
| 431 | <h3 class=fn>int <a name="year"></a>QDate::year () const
|
|---|
| 432 | </h3>
|
|---|
| 433 | Returns the year (1752..8000) of this date.
|
|---|
| 434 | <p> <p>See also <a href="#month">month</a>() and <a href="#day">day</a>().
|
|---|
| 435 |
|
|---|
| 436 | <hr><h2>Related Functions</h2>
|
|---|
| 437 | <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="qdate.html">QDate</a> & d )
|
|---|
| 438 | </h3>
|
|---|
| 439 |
|
|---|
| 440 | <p> Writes the date, <em>d</em>, to the data stream, <em>s</em>.
|
|---|
| 441 | <p> <p>See also <a href="datastreamformat.html">Format of the QDataStream operators</a>.
|
|---|
| 442 |
|
|---|
| 443 | <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="qdate.html">QDate</a> & d )
|
|---|
| 444 | </h3>
|
|---|
| 445 |
|
|---|
| 446 | <p> Reads a date from the stream <em>s</em> into <em>d</em>.
|
|---|
| 447 | <p> <p>See also <a href="datastreamformat.html">Format of the QDataStream operators</a>.
|
|---|
| 448 |
|
|---|
| 449 | <!-- eof -->
|
|---|
| 450 | <hr><p>
|
|---|
| 451 | This file is part of the <a href="index.html">Qt toolkit</a>.
|
|---|
| 452 | Copyright © 1995-2007
|
|---|
| 453 | <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
|
|---|
| 454 | <table width=100% cellspacing=0 border=0><tr>
|
|---|
| 455 | <td>Copyright © 2007
|
|---|
| 456 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
|---|
| 457 | <td align=right><div align=right>Qt 3.3.8</div>
|
|---|
| 458 | </table></div></address></body>
|
|---|
| 459 | </html>
|
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