QDateTimeEdit Class

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().

When keyboard tracking is enabled (the default), every keystroke of editing a field triggers signals for value changes.

When the allowed range is narrower than some time interval whose end it straddles, keyboard tracking prevents the user editing the date or time to access the later part of the interval. For example, for a range from 29.04.2020 to 02.05.2020 and an initial date of 30.04.2020, the user can change neither the month (May 30th is outside the range) nor the day (April 2nd is outside the range).

When keyboard tracking is disabled, changes are only signalled when focus leaves the text field after edits have modified the content. This allows the user to edit via an invalid date-time to reach a valid one.

See also QDateEdit, QTimeEdit, QDate, QTime

flags QDateTimeEdit::Sections

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

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.

Access functions:

• bool calendarPopup() const

• void setCalendarPopup(bool enable)

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This property holds the current section of the spinbox.

Access functions:

• currentSection() const

• void setCurrentSection( section)

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.

Access functions:

• int currentSectionIndex() const

• void setCurrentSectionIndex(int index)

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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:

• date() const

• void setDate( date)

Notifier signal:

• void dateChanged( date)

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

When setting this property, the new QDateTime is converted to the timespec of the QDateTimeEdit, which thus remains unchanged.

By default, this property is set to the start of 2000 CE. It can only be set to a valid QDateTime value. If any operation causes this property to have an invalid date-time as value, it is reset to the value of the minimumDateTime property.

If the QDateTimeEdit has no date fields, setting this property sets the widget's date-range to start and end on the date of the new value of this property.

Access functions:

• dateTime() const

• void setDateTime(const &dateTime)

Notifier signal:

• void dateTimeChanged(const &datetime)

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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):

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 21st (2000-2099).

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

Access functions:

• displayFormat() const

• void setDisplayFormat(const &format)

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

Returns a bit set of the displayed sections for this format.

Access functions:

• displayedSections() const

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

Changing this property updates the date of the maximumDateTime property while preserving the maximumTime property. When setting this property, the minimumDate is adjusted, if necessary, to ensure that the range remains valid. When this happens, the minimumTime property is also adjusted if it is greater than the maximumTime property. Otherwise, changes to this property preserve the minimumDateTime property.

This property can only be set to a valid QDate object describing a date on which the current maximumTime property makes a valid QDateTime object. The latest date that setMaximumDate() accepts is the end of 9999 CE. This is the default for this property. This default can be restored with clearMaximumDateTime().

Access functions:

• maximumDate() const

• void setMaximumDate( max)

• void clearMaximumDate()

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

Changing this property implicitly updates the maximumDate and maximumTime properties to the date and time parts of this property, respectively. When setting this property, the minimumDateTime is adjusted, if necessary, to ensure that the range remains valid. Otherwise, changing this property preserves the minimumDateTime property.

This property can only be set to a valid QDateTime value. The latest date-time that setMaximumDateTime() accepts is the end of 9999 CE. This is the default for this property. This default can be restored with clearMaximumDateTime().

Access functions:

• maximumDateTime() const

• void setMaximumDateTime(const &dt)

• void clearMaximumDateTime()

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

Changing this property updates the time of the maximumDateTime property while preserving the minimumDate and maximumDate properties. If those date properties coincide, when setting this property, the minimumTime property is adjusted, if necessary, to ensure that the range remains valid. Otherwise, changing this property preserves the minimumDateTime property.

This property can be set to any valid QTime value. By default, this property contains a time of 23:59:59 and 999 milliseconds. This default can be restored with clearMaximumTime().

Access functions:

• maximumTime() const

• void setMaximumTime( max)

• void clearMaximumTime()

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

Changing this property updates the date of the minimumDateTime property while preserving the minimumTime property. When setting this property, the maximumDate is adjusted, if necessary, to ensure that the range remains valid. When this happens, the maximumTime property is also adjusted if it is less than the minimumTime property. Otherwise, changes to this property preserve the maximumDateTime property.

This property can only be set to a valid QDate object describing a date on which the current minimumTime property makes a valid QDateTime object. The earliest date that setMinimumDate() accepts is the start of 100 CE. The default for this property is September 14, 1752 CE. This default can be restored with clearMinimumDateTime().

Access functions:

• minimumDate() const

• void setMinimumDate( min)

• void clearMinimumDate()

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

Changing this property implicitly updates the minimumDate and minimumTime properties to the date and time parts of this property, respectively. When setting this property, the maximumDateTime is adjusted, if necessary, to ensure that the range remains valid. Otherwise, changing this property preserves the maximumDateTime property.

This property can only be set to a valid QDateTime value. The earliest date-time that setMinimumDateTime() accepts is the start of 100 CE. The property's default is the start of September 14, 1752 CE. This default can be restored with clearMinimumDateTime().

Access functions:

• minimumDateTime() const

• void setMinimumDateTime(const &dt)

• void clearMinimumDateTime()

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

Changing this property updates the time of the minimumDateTime property while preserving the minimumDate and maximumDate properties. If those date properties coincide, when setting this property, the maximumTime property is adjusted, if necessary, to ensure that the range remains valid. Otherwise, changing this property preserves the maximumDateTime property.

This property can be set to any valid QTime value. By default, this property contains a time of 00:00:00 and 0 milliseconds. This default can be restored with clearMinimumTime().

Access functions:

• minimumTime() const

• void setMinimumTime( min)

• void clearMinimumTime()

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

Access functions:

• int sectionCount() const

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:

• time() const

• void setTime( time)

Notifier signal:

• void timeChanged( time)

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

Access functions:

• timeSpec() const

• void setTimeSpec( spec)

Constructs an empty date time editor with a parent.

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

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

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

Destructor.

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.

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Reimplements: QAbstractSpinBox::clear().

Returns the date of the date time edit.

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

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

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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.

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Reimplements: QAbstractSpinBox::event(QEvent *event).

Reimplements: QAbstractSpinBox::fixup(QString &input) const.

Reimplements: QAbstractSpinBox::focusInEvent(QFocusEvent *event).

Reimplements: QWidget::focusNextPrevChild(bool next).

Reimplements: QAbstractSpinBox::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.

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Reimplements: QAbstractSpinBox::keyPressEvent(QKeyEvent *event).

Reimplements: QAbstractSpinBox::mousePressEvent(QMouseEvent *event).

Reimplements: QAbstractSpinBox::paintEvent(QPaintEvent *event).

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,

Returns the text from the given section.

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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.

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Set the range of allowed dates for the date time edit.

This convenience function sets the minimumDate and maximumDate properties.

setDateRange(min, max);

is analogous to:

setMinimumDate(min);
setMaximumDate(max);

If either min or max is invalid, this function does nothing. This function preserves the minimumTime property. If max is less than min, the new maximumDateTime property shall be the new minimumDateTime property. If max is equal to min and the maximumTime property was less then the minimumTime property, the maximumTime property is set to the minimumTime property. Otherwise, this preserves the maximumTime property.

If the range is narrower then a time interval whose end it spans, for example a week that spans the end of a month, users can only edit the date to one in the later part of the range if keyboard-tracking is disabled.

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Set the range of allowed date-times for the date time edit.

This convenience function sets the minimumDateTime and maximumDateTime properties.

setDateTimeRange(min, max);

is analogous to:

setMinimumDateTime(min);
setMaximumDateTime(max);

If either min or max is invalid, this function does nothing. If max is less than min, min is used also as max.

If the range is narrower then a time interval whose end it spans, for example a week that spans the end of a month, users can only edit the date-time to one in the later part of the range if keyboard-tracking is disabled.

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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.

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Set the range of allowed times for the date time edit.

This convenience function sets the minimumTime and maximumTime properties.

Note that these only constrain the date time edit's value on, respectively, the minimumDate and maximumDate. When these date properties do not coincide, times after max are allowed on dates before maximumDate and times before min are allowed on dates after minimumDate.

setTimeRange(min, max);

is analogous to:

setMinimumTime(min);
setMaximumTime(max);

If either min or max is invalid, this function does nothing. This function preserves the minimumDate and maximumDate properties. If those properties coincide and max is less than min, min is used as max.

If the range is narrower then a time interval whose end it spans, for example the interval from ten to an hour to ten past the same hour, users can only edit the time to one in the later part of the range if keyboard-tracking is disabled.

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Reimplements: QAbstractSpinBox::sizeHint() const.

Reimplements: QAbstractSpinBox::stepBy(int steps).

Reimplements: QAbstractSpinBox::stepEnabled() 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().

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Returns the time of the date time edit.

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

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Reimplements: QAbstractSpinBox::validate(QString &input, int &pos) const.

Reimplements: QAbstractSpinBox::wheelEvent(QWheelEvent *event).