Detailed Description
The QDateEdit class provides a date editor.
QDateEdit allows the user to edit dates by using the keyboard or
the arrow keys to increase/decrease date values. The arrow keys
can be used to move from section to section within the QDateEdit
box. Dates appear in accordance with the local date/time settings
or in year, month, day order if the system doesn't provide this
information. It is recommended that the QDateEdit be initialised
with a date, e.g.
QDateEdit *dateEdit = new QDateEdit( QDate::currentDate(), this );
dateEdit->setRange( QDate::currentDate().addDays( -365 ),
QDate::currentDate().addDays( 365 ) );
dateEdit->setOrder( QDateEdit::MDY );
dateEdit->setAutoAdvance( TRUE );
Here we've created a new QDateEdit object initialised with today's
date and restricted the valid date range to today plus or minus
365 days. We've set the order to month, day, year. If the auto
advance property is TRUE (as we've set it here) when the user
completes a section of the date, e.g. enters two digits for the
month, they are automatically taken to the next section.
The maximum and minimum values for a date value in the date editor
default to the maximum and minimum values for a QDate. You can
change this by calling setMinValue(), setMaxValue() or setRange().
Terminology: A QDateEdit widget comprises three 'sections', one
each for the year, month and day. You can change the separator
character using QDateTimeEditor::setSeparator(), by default the
separator will be taken from the systems settings. If that is
not possible, it defaults to "-".
See also QDate, QTimeEdit, QDateTimeEdit, Advanced Widgets, and Time and Date.
Member Type Documentation
QDateEdit::Order
This enum defines the order in which the sections that comprise a
date appear.
- QDateEdit::MDY - month-day-year
- QDateEdit::DMY - day-month-year
- QDateEdit::YMD - year-month-day (the default)
- QDateEdit::YDM - year-day-month (included for completeness; but should
not be used)
Member Function Documentation
QDateEdit::QDateEdit ( QWidget * parent = 0, const char * name = 0 )
Constructs an empty date editor which is a child of parent and
called name name.
QDateEdit::QDateEdit ( const QDate & date, QWidget * parent = 0, const char * name = 0 )
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
Constructs a date editor with the initial value date, parent parent and called name.
The date editor is initialized with date.
QDateEdit::~QDateEdit ()
Destroys the object and frees any allocated resources.
bool QDateEdit::autoAdvance () const
Returns TRUE if the editor automatically advances to the next section; otherwise returns FALSE.
See the "autoAdvance" property for details.
QDate QDateEdit::date () const
Returns the editor's date value.
See the "date" property for details.
void QDateEdit::fix () [virtual protected]
Attempts to fix any invalid date entries.
The rules applied are as follows:
- If the year has four digits it is left unchanged.
- If the year has two digits, the year will be changed to four
digits in the range current year - 70 to current year + 29.
- If the year has three digits in the range 100..999, the
current millennium, i.e. 2000, will be added giving a year
in the range 2100..2999.
QDate QDateEdit::maxValue () const
Returns the editor's maximum value.
See the "maxValue" property for details.
QDate QDateEdit::minValue () const
Returns the editor's minimum value.
See the "minValue" property for details.
Order QDateEdit::order () const
Returns the order in which the year, month and day appear.
See the "order" property for details.
QString QDateEdit::sectionFormattedText ( int sec ) [virtual protected]
Returns the formatted number for section sec. This will
correspond to either the year, month or day section, depending on
the current display order.
See also order.
QString QDateEdit::separator () const
Returns the editor's separator.
void QDateEdit::setAutoAdvance ( bool advance ) [virtual]
Sets whether the editor automatically advances to the next section to advance.
See the "autoAdvance" property for details.
void QDateEdit::setDate ( const QDate & date ) [virtual slot]
Sets the editor's date value to date.
See the "date" property for details.
void QDateEdit::setDay ( int day ) [virtual protected]
Sets the day to day, which must be a valid day. The function
will ensure that the day set is valid for the month and year.
void QDateEdit::setMaxValue ( const QDate & d ) [virtual]
Sets the editor's maximum value to d.
See the "maxValue" property for details.
void QDateEdit::setMinValue ( const QDate & d ) [virtual]
Sets the editor's minimum value to d.
See the "minValue" property for details.
void QDateEdit::setMonth ( int month ) [virtual protected]
Sets the month to month, which must be a valid month, i.e.
between 1 and 12.
void QDateEdit::setOrder ( Order order ) [virtual]
Sets the order in which the year, month and day appear to order.
See the "order" property for details.
void QDateEdit::setRange ( const QDate & min, const QDate & max ) [virtual]
Sets the valid input range for the editor to be from min to max inclusive. If min is invalid no minimum date will be set.
Similarly, if max is invalid no maximum date will be set.
void QDateEdit::setSeparator ( const QString & s ) [virtual]
Sets the separator to s. Note that currently only the first
character of s is used.
void QDateEdit::setYear ( int year ) [virtual protected]
Sets the year to year, which must be a valid year. The range
currently supported is from 1752 to 8000.
See also QDate.
void QDateEdit::updateButtons () [protected slot]
Enables/disables the push buttons according to the min/max date
for this widget.
void QDateEdit::valueChanged ( const QDate & date ) [signal]
This signal is emitted whenever the editor's value changes. The date parameter is the new value.
Property Documentation
bool autoAdvance
This property holds whether the editor automatically advances to the next section.
If autoAdvance is TRUE, the editor will automatically advance
focus to the next date section if a user has completed a section.
The default is FALSE.
Set this property's value with setAutoAdvance() and get this property's value with autoAdvance().
This property holds the editor's date value.
If the date property is not valid, the editor displays all zeroes
and QDateEdit::date() will return an invalid date. It is strongly
recommended that the editor is given a default date value (e.g.
currentDate()). That way, attempts to set the date property to an
invalid date will fail.
When changing the date property, if the date is less than
minValue(), or is greater than maxValue(), nothing happens.
Set this property's value with setDate() and get this property's value with date().
This property holds the editor's maximum value.
Setting the maximum date value for the editor is equivalent to
calling QDateEdit::setRange( minValue(), d ), where d is the
maximum date. The default maximum date is 8000-12-31.
See also minValue and setRange().
Set this property's value with setMaxValue() and get this property's value with maxValue().
This property holds the editor's minimum value.
Setting the minimum date value is equivalent to calling
QDateEdit::setRange( d, maxValue() ), where d is the minimum
date. The default minimum date is 1752-09-14.
See also maxValue and setRange().
Set this property's value with setMinValue() and get this property's value with minValue().
This property holds the order in which the year, month and day appear.
The default order is locale dependent.
See also Order.
Set this property's value with setOrder() and get this property's value with order().
This file is part of the Qt toolkit.
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Trolltech. All Rights Reserved.
