Qt 4.8: QDateTimeEdit Class Reference

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# QDateTimeEdit Class Reference

The QDateTimeEdit class provides a widget for editing dates and times. More...

     #include <QDateTimeEdit>

Inherits: QAbstractSpinBox.

Inherited by: QDateEdit and QTimeEdit.

- List of all members, including inherited members

## Public Types

enum | Section { NoSection, AmPmSection, MSecSection, SecondSection, ..., YearSection }
flags | Sections

## Properties

calendarPopup : bool currentSection : Section currentSectionIndex : int date : QDate dateTime : QDateTime displayFormat : QString displayedSections : const Sections maximumDate : QDate | maximumDateTime : QDateTime maximumTime : QTime minimumDate : QDate minimumDateTime : QDateTime minimumTime : QTime sectionCount : const int time : QTime timeSpec : Qt::TimeSpec

- 11 properties inherited from QAbstractSpinBox
- 58 properties inherited from QWidget
- 1 property inherited from QObject

## Public Functions

| QDateTimeEdit ( QWidget * parent = 0 )
| QDateTimeEdit ( const QDateTime & datetime, QWidget * parent = 0 )
| QDateTimeEdit ( const QDate & date, QWidget * parent = 0 )
| QDateTimeEdit ( const QTime & time, QWidget * parent = 0 )
bool | calendarPopup () const
QCalendarWidget * | calendarWidget () const
void | clearMaximumDate ()
void | clearMaximumDateTime ()
void | clearMaximumTime ()
void | clearMinimumDate ()
void | clearMinimumDateTime ()
void | clearMinimumTime ()
Section | currentSection () const
int | currentSectionIndex () const
QDate | date () const
QDateTime | dateTime () const
QString | displayFormat () const
Sections | displayedSections () const
QDate | maximumDate () const
QDateTime | maximumDateTime () const
QTime | maximumTime () const
QDate | minimumDate () const
QDateTime | minimumDateTime () const
QTime | minimumTime () const
Section | sectionAt ( int index ) const
int | sectionCount () const
QString | sectionText ( Section section ) const
void | setCalendarPopup ( bool enable )
void | setCalendarWidget ( QCalendarWidget * calendarWidget )
void | setCurrentSection ( Section section )
void | setCurrentSectionIndex ( int index )
void | setDateRange ( const QDate & min, const QDate & max )
void | setDateTimeRange ( const QDateTime & min, const QDateTime & max )
void | setDisplayFormat ( const QString & format )
void | setMaximumDate ( const QDate & max )
void | setMaximumDateTime ( const QDateTime & dt )
void | setMaximumTime ( const QTime & max )
void | setMinimumDate ( const QDate & min )
void | setMinimumDateTime ( const QDateTime & dt )
void | setMinimumTime ( const QTime & min )
void | setSelectedSection ( Section section )
void | setTimeRange ( const QTime & min, const QTime & max )
void | setTimeSpec ( Qt::TimeSpec spec )
QTime | time () const
Qt::TimeSpec | timeSpec () const

## Reimplemented Public Functions

virtual void | clear ()
virtual bool | event ( QEvent * event )
virtual QSize | sizeHint () const
virtual void | stepBy ( int steps )

- 28 public functions inherited from QAbstractSpinBox
- 221 public functions inherited from QWidget
- 29 public functions inherited from QObject
- 13 public functions inherited from QPaintDevice

## Public Slots

void | setDate ( const QDate & date )
void | setDateTime ( const QDateTime & dateTime )
void | setTime ( const QTime & time )

- 4 public slots inherited from QAbstractSpinBox
- 19 public slots inherited from QWidget
- 1 public slot inherited from QObject

## Signals

void | dateChanged ( const QDate & date )
void | dateTimeChanged ( const QDateTime & datetime )
void | timeChanged ( const QTime & time )

- 1 signal inherited from QAbstractSpinBox
- 1 signal inherited from QWidget
- 1 signal inherited from QObject

## Protected Functions

virtual QDateTime | dateTimeFromText ( const QString & text ) const
void | initStyleOption ( QStyleOptionSpinBox * option ) const
virtual QString | textFromDateTime ( const QDateTime & dateTime ) const

## Reimplemented Protected Functions

virtual void | fixup ( QString & input ) const
virtual void | focusInEvent ( QFocusEvent * event )
virtual bool | focusNextPrevChild ( bool next )
virtual void | keyPressEvent ( QKeyEvent * event )
virtual void | mousePressEvent ( QMouseEvent * event )
virtual void | paintEvent ( QPaintEvent * event )
virtual StepEnabled | stepEnabled () const
virtual QValidator::State | validate ( QString & text, int & pos ) const
virtual void | wheelEvent ( QWheelEvent * event )

- 20 protected functions inherited from QAbstractSpinBox
- 37 protected functions inherited from QWidget
- 8 protected functions inherited from QObject
- 1 protected function inherited from QPaintDevice

### Additional Inherited Members

- 4 static public members inherited from QWidget
- 7 static public members inherited from QObject
- 1 protected slot inherited from QWidget

## Detailed Description

The QDateTimeEdit class provides a widget for editing dates and times.

QDateTimeEdit allows the user to edit dates by using the keyboard or the arrow keys to increase and decrease date and time values. The arrow keys can be used to move from section to section within the QDateTimeEdit box. Dates and times appear in accordance with the format set; see setDisplayFormat().

     QDateTimeEdit *dateEdit = new QDateTimeEdit(QDate::currentDate());
     dateEdit->setMinimumDate(QDate::currentDate().addDays(-365));
     dateEdit->setMaximumDate(QDate::currentDate().addDays(365));
     dateEdit->setDisplayFormat("yyyy.MM.dd");

Here we've created a new QDateTimeEdit object initialized 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.

The minimum value for QDateTimeEdit is 14 September 1752, and 2 January 4713BC for QDate. You can change this by calling setMinimumDate(), setMaximumDate(), setMinimumTime(), and setMaximumTime().

### Using a Pop-up Calendar Widget

QDateTimeEdit can be configured to allow a QCalendarWidget to be used to select dates. This is enabled by setting the calendarPopup property. Additionally, you can supply a custom calendar widget for use as the calendar pop-up by calling the setCalendarWidget() function. The existing calendar widget can be retrieved with calendarWidget().

| A date time editing widget shown in the Windows XP widget style.
| A date time editing widget shown in the Macintosh widget style.
| A date time editing widget shown in the Plastique widget style.

See also QDateEdit, QTimeEdit, QDate, and QTime.

## Member Type Documentation

### enum QDateTimeEdit::Section
flags QDateTimeEdit::Sections

Constant | Value
--- | ---
`QDateTimeEdit::NoSection` | `0x0000`
`QDateTimeEdit::AmPmSection` | `0x0001`
`QDateTimeEdit::MSecSection` | `0x0002`
`QDateTimeEdit::SecondSection` | `0x0004`
`QDateTimeEdit::MinuteSection` | `0x0008`
`QDateTimeEdit::HourSection` | `0x0010`
`QDateTimeEdit::DaySection` | `0x0100`
`QDateTimeEdit::MonthSection` | `0x0200`
`QDateTimeEdit::YearSection` | `0x0400`

The Sections type is a typedef for QFlags<Section>. It stores an OR combination of Section values.

## Property Documentation

### calendarPopup : bool

This property holds the current calendar pop-up showing mode.

The calendar pop-up will be shown upon clicking the arrow button. This property is valid only if there is a valid date display format.

This property was introduced in Qt 4.2.

Access functions:

bool | calendarPopup () const
void | setCalendarPopup ( bool enable )

See also setDisplayFormat().

### currentSection : Section

This property holds the current section of the spinbox setCurrentSection().

Access functions:

Section | currentSection () const
void | setCurrentSection ( Section section )

### currentSectionIndex : int

This property holds the current section index of the spinbox.

If the format is 'yyyy/MM/dd', the displayText is '2001/05/21' and the cursorPosition is 5 currentSectionIndex returns 1. If the cursorPosition is 3 currentSectionIndex is 0 etc.

setCurrentSection()

This property was introduced in Qt 4.3.

Access functions:

int | currentSectionIndex () const
void | setCurrentSectionIndex ( int index )

See also currentSection().

### date : QDate

This property holds the QDate that is set in the widget.

By default, this property contains a date that refers to January 1, 2000.

Access functions:

QDate | date () const
void | setDate ( const QDate & date )

Notifier signal:

void | dateChanged ( const QDate & date )

See also time and dateTime.

### dateTime : QDateTime

This property holds the QDateTime that is set in the QDateTimeEdit.

When setting this property the timespec of the QDateTimeEdit remains the same and the timespec of the new QDateTime is ignored.

By default, this property contains a date that refers to January 1, 2000 and a time of 00:00:00 and 0 milliseconds.

Access functions:

QDateTime | dateTime () const
void | setDateTime ( const QDateTime & dateTime )

Notifier signal:

void | dateTimeChanged ( const QDateTime & datetime )

See also date and time.

### displayFormat : QString

This property holds the format used to display the time/date of the date time edit.

This format is the same as the one used described in QDateTime::toString() and QDateTime::fromString()

Example format strings (assuming that the date is 2nd of July 1969):

Format | Result
--- | ---
dd.MM.yyyy | 02.07.1969
MMM d yy | Jul 2 69
MMMM d yy | July 2 69

Note that if you specify a two digit year, it will be interpreted to be in the century in which the date time edit was initialized. The default century is the 21 (2000-2099).

If you specify an invalid format the format will not be set.

Access functions:

QString | displayFormat () const
void | setDisplayFormat ( const QString & format )

See also QDateTime::toString() and displayedSections().

### displayedSections : const Sections

This property holds the currently displayed fields of the date time edit.

Returns a bit set of the displayed sections for this format. setDisplayFormat(), displayFormat()

Access functions:

Sections | displayedSections () const

### maximumDate : QDate

This property holds the maximum date of the date time edit.

When setting this property the minimumDate is adjusted if necessary to ensure that the range remains valid. If the date is not a valid QDate object, this function does nothing.

By default, this property contains a date that refers to December 31, 7999.

Access functions:

QDate | maximumDate () const
void | setMaximumDate ( const QDate & max )
void | clearMaximumDate ()

See also minimumDate, minimumTime, maximumTime, and setDateRange().

### maximumDateTime : QDateTime

This property holds the maximum datetime of the date time edit.

When setting this property the minimumDateTime() is adjusted if necessary to ensure that the range remains valid. If the datetime is not a valid QDateTime object, this function does nothing.

The default maximumDateTime can be restored with clearMaximumDateTime().

By default, this property contains a date that refers to 31 December, 7999 and a time of 23:59:59 and 999 milliseconds.

This property was introduced in Qt 4.4.

Access functions:

QDateTime | maximumDateTime () const
void | setMaximumDateTime ( const QDateTime & dt )
void | clearMaximumDateTime ()

See also minimumDateTime(), minimumTime(), maximumTime(), minimumDate(), maximumDate(), setDateTimeRange(), setDateRange(), setTimeRange(), clearMinimumDateTime(), clearMinimumDate(), clearMaximumDate(), clearMinimumTime(), and clearMaximumTime().

### maximumTime : QTime

This property holds the maximum time of the date time edit.

When setting this property, the minimumTime is adjusted if necessary to ensure that the range remains valid. If the time is not a valid QTime object, this function does nothing.

By default, this property contains a time of 23:59:59 and 999 milliseconds.

Access functions:

QTime | maximumTime () const
void | setMaximumTime ( const QTime & max )
void | clearMaximumTime ()

See also minimumTime, minimumDate, maximumDate, and setTimeRange().

### minimumDate : QDate

This property holds the minimum date of the date time edit.

When setting this property the maximumDate is adjusted if necessary, to ensure that the range remains valid. If the date is not a valid QDate object, this function does nothing.

By default, this property contains a date that refers to September 14, 1752. The minimum date must be at least the first day in year 100, otherwise setMinimumDate() has no effect.

Access functions:

QDate | minimumDate () const
void | setMinimumDate ( const QDate & min )
void | clearMinimumDate ()

See also minimumTime(), maximumTime(), and setDateRange().

### minimumDateTime : QDateTime

This property holds the minimum datetime of the date time edit.

When setting this property the maximumDateTime() is adjusted if necessary to ensure that the range remains valid. If the datetime is not a valid QDateTime object, this function does nothing.

The default minimumDateTime can be restored with clearMinimumDateTime()

By default, this property contains a date that refers to September 14, 1752 and a time of 00:00:00 and 0 milliseconds.

This property was introduced in Qt 4.4.

Access functions:

QDateTime | minimumDateTime () const
void | setMinimumDateTime ( const QDateTime & dt )
void | clearMinimumDateTime ()

See also maximumDateTime(), minimumTime(), maximumTime(), minimumDate(), maximumDate(), setDateTimeRange(), setDateRange(), setTimeRange(), clearMaximumDateTime(), clearMinimumDate(), clearMaximumDate(), clearMinimumTime(), and clearMaximumTime().

### minimumTime : QTime

This property holds the minimum time of the date time edit.

When setting this property the maximumTime is adjusted if necessary, to ensure that the range remains valid. If the time is not a valid QTime object, this function does nothing.

By default, this property contains a time of 00:00:00 and 0 milliseconds.

Access functions:

QTime | minimumTime () const
void | setMinimumTime ( const QTime & min )
void | clearMinimumTime ()

See also maximumTime, minimumDate, maximumDate, and setTimeRange().

### sectionCount : const int

This property holds the number of sections displayed. If the format is 'yyyy/yy/yyyy', sectionCount returns 3.

This property was introduced in Qt 4.3.

Access functions:

int | sectionCount () const

### time : QTime

This property holds the QTime that is set in the widget.

By default, this property contains a time of 00:00:00 and 0 milliseconds.

Access functions:

QTime | time () const
void | setTime ( const QTime & time )

Notifier signal:

void | timeChanged ( const QTime & time )

See also date and dateTime.

### timeSpec : Qt::TimeSpec

This property holds the current timespec used by the date time edit.

This property was introduced in Qt 4.4.

Access functions:

Qt::TimeSpec | timeSpec () const
void | setTimeSpec ( Qt::TimeSpec spec )

## Member Function Documentation

### QDateTimeEdit::QDateTimeEdit ( QWidget * parent = 0 )

Constructs an empty date time editor with a parent.

### QDateTimeEdit::QDateTimeEdit ( const QDateTime & datetime, QWidget * parent = 0 )

Constructs an empty date time editor with a parent. The value is set to datetime.

### QDateTimeEdit::QDateTimeEdit ( const QDate & date, QWidget * parent = 0 )

Constructs an empty date time editor with a parent. The value is set to date.

### QDateTimeEdit::QDateTimeEdit ( const QTime & time, QWidget * parent = 0 )

Constructs an empty date time editor with a parent. The value is set to time.

### QCalendarWidget * QDateTimeEdit::calendarWidget () const

Returns the calendar widget for the editor if calendarPopup is set to true and (sections() & DateSections_Mask) != 0.

This function creates and returns a calendar widget if none has been set.

This function was introduced in Qt 4.4.

See also setCalendarWidget().

### void QDateTimeEdit::clear ()`[virtual]`

Reimplemented from QAbstractSpinBox::clear().

### void QDateTimeEdit::dateChanged ( const QDate & date )`[signal]`

This signal is emitted whenever the date is changed. The new date is passed in date.

### void QDateTimeEdit::dateTimeChanged ( const QDateTime & datetime )`[signal]`

This signal is emitted whenever the date or time is changed. The new date and time is passed in datetime.

### QDateTime QDateTimeEdit::dateTimeFromText ( const QString & text ) const`[virtual protected]`

Returns an appropriate datetime for the given text.

This virtual function is used by the datetime edit whenever it needs to interpret text entered by the user as a value.

See also textFromDateTime() and validate().

### bool QDateTimeEdit::event ( QEvent * event )`[virtual]`

Reimplemented from QObject::event().

### void QDateTimeEdit::fixup ( QString & input ) const`[virtual protected]`

Reimplemented from QAbstractSpinBox::fixup().

### void QDateTimeEdit::focusInEvent ( QFocusEvent * event )`[virtual protected]`

Reimplemented from QWidget::focusInEvent().

### bool QDateTimeEdit::focusNextPrevChild ( bool next )`[virtual protected]`

Reimplemented from QWidget::focusNextPrevChild().

### void QDateTimeEdit::initStyleOption ( QStyleOptionSpinBox * option ) const`[protected]`

Initialize option with the values from this QDataTimeEdit. This method is useful for subclasses when they need a QStyleOptionSpinBox, but don't want to fill in all the information themselves.

See also QStyleOption::initFrom().

### void QDateTimeEdit::keyPressEvent ( QKeyEvent * event )`[virtual protected]`

Reimplemented from QWidget::keyPressEvent().

### void QDateTimeEdit::mousePressEvent ( QMouseEvent * event )`[virtual protected]`

Reimplemented from QWidget::mousePressEvent().

### void QDateTimeEdit::paintEvent ( QPaintEvent * event )`[virtual protected]`

Reimplemented from QWidget::paintEvent().

### Section QDateTimeEdit::sectionAt ( int index ) const

Returns the Section at index.

If the format is 'yyyy/MM/dd', sectionAt(0) returns YearSection, sectionAt(1) returns MonthSection, and sectionAt(2) returns YearSection,

This function was introduced in Qt 4.3.

### QString QDateTimeEdit::sectionText ( Section section ) const

Returns the text from the given section.

See also currentSection().

### void QDateTimeEdit::setCalendarWidget ( QCalendarWidget * calendarWidget )

Sets the given calendarWidget as the widget to be used for the calendar pop-up. The editor does not automatically take ownership of the calendar widget.

Note: calendarPopup must be set to true before setting the calendar widget.

This function was introduced in Qt 4.4.

See also calendarWidget() and calendarPopup.

### void QDateTimeEdit::setDateRange ( const QDate & min, const QDate & max )

Convenience function to set minimum and maximum date with one function call.

     setDateRange(min, max);

is analogous to:

     setMinimumDate(min);
     setMaximumDate(max);

If either min or max are not valid, this function does nothing.

See also setMinimumDate(), maximumDate(), setMaximumDate(), clearMinimumDate(), setMinimumTime(), maximumTime(), setMaximumTime(), clearMinimumTime(), and QDate::isValid().

### void QDateTimeEdit::setDateTimeRange ( const QDateTime & min, const QDateTime & max )

Convenience function to set minimum and maximum date time with one function call.

     setDateTimeRange(min, max);

is analogous to:

     setMinimumDateTime(min);
     setMaximumDateTime(max);

If either min or max are not valid, this function does nothing.

This function was introduced in Qt 4.4.

See also setMinimumDate(), maximumDate(), setMaximumDate(), clearMinimumDate(), setMinimumTime(), maximumTime(), setMaximumTime(), clearMinimumTime(), and QDateTime::isValid().

### void QDateTimeEdit::setSelectedSection ( Section section )

Selects section. If section doesn't exist in the currently displayed sections this function does nothing. If section is NoSection this function will unselect all text in the editor. Otherwise this function will move the cursor and the current section to the selected section.

This function was introduced in Qt 4.2.

See also currentSection().

### void QDateTimeEdit::setTimeRange ( const QTime & min, const QTime & max )

Convenience function to set minimum and maximum time with one function call.

     setTimeRange(min, max);

is analogous to:

     setMinimumTime(min);
     setMaximumTime(max);

If either min or max are not valid, this function does nothing.

See also setMinimumDate(), maximumDate(), setMaximumDate(), clearMinimumDate(), setMinimumTime(), maximumTime(), setMaximumTime(), clearMinimumTime(), and QTime::isValid().

### QSize QDateTimeEdit::sizeHint () const`[virtual]`

Reimplemented from QWidget::sizeHint().

### void QDateTimeEdit::stepBy ( int steps )`[virtual]`

Reimplemented from QAbstractSpinBox::stepBy().

### StepEnabled QDateTimeEdit::stepEnabled () const`[virtual protected]`

Reimplemented from QAbstractSpinBox::stepEnabled().

### QString QDateTimeEdit::textFromDateTime ( const QDateTime & dateTime ) const`[virtual protected]`

This virtual function is used by the date time edit whenever it needs to display dateTime.

If you reimplement this, you may also need to reimplement validate().

See also dateTimeFromText() and validate().

### void QDateTimeEdit::timeChanged ( const QTime & time )`[signal]`

This signal is emitted whenever the time is changed. The new time is passed in time.

### QValidator::State QDateTimeEdit::validate ( QString & text, int & pos ) const`[virtual protected]`

Reimplemented from QAbstractSpinBox::validate().

### void QDateTimeEdit::wheelEvent ( QWheelEvent * event )`[virtual protected]`

Reimplemented from QWidget::wheelEvent().