QDateTimeEdit Class | Qt Widgets 5.12.8

Qt 5.12 | Qt Widgets | C++ Classes | QDateTimeEdit

Qt 5.12.8 Reference Documentation

# QDateTimeEdit Class

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

Header: | #include <QDateTimeEdit>
qmake: | QT += widgets
Inherits: | QAbstractSpinBox
Inherited By: | QDateEdit and QTimeEdit

- List of all members, including inherited members
- Obsolete 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

- 12 properties inherited from QAbstractSpinBox
- 59 properties inherited from QWidget
- 1 property inherited from QObject

## Public Functions

| QDateTimeEdit(QWidget *parent = nullptr)
| QDateTimeEdit(const QDateTime &datetime, QWidget *parent = nullptr)
| QDateTimeEdit(const QDate &date, QWidget *parent = nullptr)
| QDateTimeEdit(const QTime &time, QWidget *parent = nullptr)
virtual | ~QDateTimeEdit()
bool | calendarPopup() const
QCalendarWidget * | calendarWidget() const
void | clearMaximumDate()
void | clearMaximumDateTime()
void | clearMaximumTime()
void | clearMinimumDate()
void | clearMinimumDateTime()
void | clearMinimumTime()
QDateTimeEdit::Section | currentSection() const
int | currentSectionIndex() const
QDate | date() const
QDateTime | dateTime() const
QString | displayFormat() const
QDateTimeEdit::Sections | displayedSections() const
QDate | maximumDate() const
QDateTime | maximumDateTime() const
QTime | maximumTime() const
QDate | minimumDate() const
QDateTime | minimumDateTime() const
QTime | minimumTime() const
QDateTimeEdit::Section | sectionAt(int index) const
int | sectionCount() const
QString | sectionText(QDateTimeEdit::Section section) const
void | setCalendarPopup(bool enable)
void | setCalendarWidget(QCalendarWidget *calendarWidget)
void | setCurrentSection(QDateTimeEdit::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(QDateTimeEdit::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() override
virtual bool | event(QEvent *event) override
virtual QSize | sizeHint() const override
virtual void | stepBy(int steps) override

- 30 public functions inherited from QAbstractSpinBox
- 214 public functions inherited from QWidget
- 31 public functions inherited from QObject
- 14 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
- 3 signals inherited from QWidget
- 2 signals inherited from QObject

## Static Public Members

const QMetaObject | staticMetaObject

- 5 static public members inherited from QWidget
- 9 static public members 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 override
virtual void | focusInEvent(QFocusEvent *event) override
virtual bool | focusNextPrevChild(bool next) override
virtual void | keyPressEvent(QKeyEvent *event) override
virtual void | mousePressEvent(QMouseEvent *event) override
virtual void | paintEvent(QPaintEvent *event) override
virtual QAbstractSpinBox::StepEnabled | stepEnabled() const override
virtual QValidator::State | validate(QString &text, int &pos) const override
virtual void | wheelEvent(QWheelEvent *event) override

- 20 protected functions inherited from QAbstractSpinBox
- 35 protected functions inherited from QWidget
- 9 protected functions inherited from QObject
- 1 protected function inherited from QPaintDevice

### Additional Inherited Members

- 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. You can change this by calling setMinimumDate(), taking into account that the minimum value for QDate is 2 January 4713BC.

Other useful functions are 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().

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 show 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:

QDateTimeEdit::Section | currentSection() const
void | setCurrentSection(QDateTimeEdit::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, and so on.

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 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:

QDateTimeEdit::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, 9999.

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, 9999 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 = nullptr)

Constructs an empty date time editor with a parent.

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

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

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

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

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

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

### `[virtual]` QDateTimeEdit::~QDateTimeEdit()

Destructor.

### 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().

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

Reimplemented from QAbstractSpinBox::clear().

### QDate QDateTimeEdit::date() const

Returns the date of the date time edit.

Note: Getter function for property date.

See also setDate().

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

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

Note: Notifier signal for property date.

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

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

Note: Notifier signal for property dateTime.

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

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().

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

Reimplemented from QAbstractSpinBox::event().

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

Reimplemented from QAbstractSpinBox::fixup().

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

Reimplemented from QAbstractSpinBox::focusInEvent().

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

Reimplemented from QWidget::focusNextPrevChild().

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

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().

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

Reimplemented from QAbstractSpinBox::keyPressEvent().

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

Reimplemented from QAbstractSpinBox::mousePressEvent().

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

Reimplemented from QAbstractSpinBox::paintEvent().

### QDateTimeEdit::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(QDateTimeEdit::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(QDateTimeEdit::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().

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

Reimplemented from QAbstractSpinBox::sizeHint().

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

Reimplemented from QAbstractSpinBox::stepBy().

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

Reimplemented from QAbstractSpinBox::stepEnabled().

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

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().

### QTime QDateTimeEdit::time() const

Returns the time of the date time edit.

Note: Getter function for property time.

See also setTime().

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

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

Note: Notifier signal for property time.

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

Reimplemented from QAbstractSpinBox::validate().

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

Reimplemented from QAbstractSpinBox::wheelEvent().