blob: 2d93b8946dc6a72fb6f1d8c5598ccf1bf8913141 [file] [log] [blame]
// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:ui' show hashValues;
import 'package:flutter/widgets.dart';
import 'debug.dart';
import 'material_localizations.dart';
/// Whether the [TimeOfDay] is before or after noon.
enum DayPeriod {
/// Ante meridiem (before noon).
am,
/// Post meridiem (after noon).
pm,
}
/// A value representing a time during the day, independent of the date that
/// day might fall on or the time zone.
///
/// The time is represented by [hour] and [minute] pair. Once created, both
/// values cannot be changed.
///
/// You can create TimeOfDay using the constructor which requires both hour and
/// minute or using [DateTime] object.
/// Hours are specified between 0 and 23, as in a 24-hour clock.
///
/// {@tool snippet}
///
/// ```dart
/// TimeOfDay now = TimeOfDay.now();
/// TimeOfDay releaseTime = TimeOfDay(hour: 15, minute: 0); // 3:00pm
/// TimeOfDay roomBooked = TimeOfDay.fromDateTime(DateTime.parse('2018-10-20 16:30:04Z')); // 4:30pm
/// ```
/// {@end-tool}
///
/// See also:
///
/// * [showTimePicker], which returns this type.
/// * [MaterialLocalizations], which provides methods for formatting values of
/// this type according to the chosen [Locale].
/// * [DateTime], which represents date and time, and is subject to eras and
/// time zones.
@immutable
class TimeOfDay {
/// Creates a time of day.
///
/// The [hour] argument must be between 0 and 23, inclusive. The [minute]
/// argument must be between 0 and 59, inclusive.
const TimeOfDay({ @required this.hour, @required this.minute });
/// Creates a time of day based on the given time.
///
/// The [hour] is set to the time's hour and the [minute] is set to the time's
/// minute in the timezone of the given [DateTime].
TimeOfDay.fromDateTime(DateTime time)
: hour = time.hour,
minute = time.minute;
/// Creates a time of day based on the current time.
///
/// The [hour] is set to the current hour and the [minute] is set to the
/// current minute in the local time zone.
factory TimeOfDay.now() { return TimeOfDay.fromDateTime(DateTime.now()); }
/// The number of hours in one day, i.e. 24.
static const int hoursPerDay = 24;
/// The number of hours in one day period (see also [DayPeriod]), i.e. 12.
static const int hoursPerPeriod = 12;
/// The number of minutes in one hour, i.e. 60.
static const int minutesPerHour = 60;
/// Returns a new TimeOfDay with the hour and/or minute replaced.
TimeOfDay replacing({ int hour, int minute }) {
assert(hour == null || (hour >= 0 && hour < hoursPerDay));
assert(minute == null || (minute >= 0 && minute < minutesPerHour));
return TimeOfDay(hour: hour ?? this.hour, minute: minute ?? this.minute);
}
/// The selected hour, in 24 hour time from 0..23.
final int hour;
/// The selected minute.
final int minute;
/// Whether this time of day is before or after noon.
DayPeriod get period => hour < hoursPerPeriod ? DayPeriod.am : DayPeriod.pm;
/// Which hour of the current period (e.g., am or pm) this time is.
int get hourOfPeriod => hour - periodOffset;
/// The hour at which the current period starts.
int get periodOffset => period == DayPeriod.am ? 0 : hoursPerPeriod;
/// Returns the localized string representation of this time of day.
///
/// This is a shortcut for [MaterialLocalizations.formatTimeOfDay].
String format(BuildContext context) {
assert(debugCheckHasMediaQuery(context));
assert(debugCheckHasMaterialLocalizations(context));
final MaterialLocalizations localizations = MaterialLocalizations.of(context);
return localizations.formatTimeOfDay(
this,
alwaysUse24HourFormat: MediaQuery.of(context).alwaysUse24HourFormat,
);
}
@override
bool operator ==(Object other) {
return other is TimeOfDay
&& other.hour == hour
&& other.minute == minute;
}
@override
int get hashCode => hashValues(hour, minute);
@override
String toString() {
String _addLeadingZeroIfNeeded(int value) {
if (value < 10)
return '0$value';
return value.toString();
}
final String hourLabel = _addLeadingZeroIfNeeded(hour);
final String minuteLabel = _addLeadingZeroIfNeeded(minute);
return '$TimeOfDay($hourLabel:$minuteLabel)';
}
}
/// Determines how the time picker invoked using [showTimePicker] formats and
/// lays out the time controls.
///
/// The time picker provides layout configurations optimized for each of the
/// enum values.
enum TimeOfDayFormat {
/// Corresponds to the ICU 'HH:mm' pattern.
///
/// This format uses 24-hour two-digit zero-padded hours. Controls are always
/// laid out horizontally. Hours are separated from minutes by one colon
/// character.
HH_colon_mm,
/// Corresponds to the ICU 'HH.mm' pattern.
///
/// This format uses 24-hour two-digit zero-padded hours. Controls are always
/// laid out horizontally. Hours are separated from minutes by one dot
/// character.
HH_dot_mm,
/// Corresponds to the ICU "HH 'h' mm" pattern used in Canadian French.
///
/// This format uses 24-hour two-digit zero-padded hours. Controls are always
/// laid out horizontally. Hours are separated from minutes by letter 'h'.
frenchCanadian,
/// Corresponds to the ICU 'H:mm' pattern.
///
/// This format uses 24-hour non-padded variable-length hours. Controls are
/// always laid out horizontally. Hours are separated from minutes by one
/// colon character.
H_colon_mm,
/// Corresponds to the ICU 'h:mm a' pattern.
///
/// This format uses 12-hour non-padded variable-length hours with a day
/// period. Controls are laid out horizontally in portrait mode. In landscape
/// mode, the day period appears vertically after (consistent with the ambient
/// [TextDirection]) hour-minute indicator. Hours are separated from minutes
/// by one colon character.
h_colon_mm_space_a,
/// Corresponds to the ICU 'a h:mm' pattern.
///
/// This format uses 12-hour non-padded variable-length hours with a day
/// period. Controls are laid out horizontally in portrait mode. In landscape
/// mode, the day period appears vertically before (consistent with the
/// ambient [TextDirection]) hour-minute indicator. Hours are separated from
/// minutes by one colon character.
a_space_h_colon_mm,
}
/// Describes how hours are formatted.
enum HourFormat {
/// Zero-padded two-digit 24-hour format ranging from "00" to "23".
HH,
/// Non-padded variable-length 24-hour format ranging from "0" to "23".
H,
/// Non-padded variable-length hour in day period format ranging from "1" to
/// "12".
h,
}
/// The [HourFormat] used for the given [TimeOfDayFormat].
HourFormat hourFormat({ @required TimeOfDayFormat of }) {
switch (of) {
case TimeOfDayFormat.h_colon_mm_space_a:
case TimeOfDayFormat.a_space_h_colon_mm:
return HourFormat.h;
case TimeOfDayFormat.H_colon_mm:
return HourFormat.H;
case TimeOfDayFormat.HH_dot_mm:
case TimeOfDayFormat.HH_colon_mm:
case TimeOfDayFormat.frenchCanadian:
return HourFormat.HH;
}
return null;
}