-
Notifications
You must be signed in to change notification settings - Fork 26
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
3 changed files
with
126 additions
and
14 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
105 changes: 105 additions & 0 deletions
105
forui/lib/src/widgets/calendar/calendar_controller.dart
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| import 'package:flutter/widgets.dart'; | ||
| import 'package:forui/forui.dart'; | ||
| import 'package:sugar/sugar.dart'; | ||
|
|
||
| /// A controller that controls date selection in a calendar. | ||
| abstract class FCalendarController<T> extends ValueNotifier<T> { | ||
| /// Creates a [FCalendarController] with the given initial [value]. | ||
| FCalendarController(super._value); | ||
|
|
||
| /// Called when the given [date] in a [FCalendarPickerType.day] picker is pressed. | ||
| /// | ||
| /// [date] is always in UTC timezone and truncated to the nearest date. | ||
| void onPress(DateTime date); | ||
|
|
||
| /// Returns true if the given [date] is selected. | ||
| bool contains(DateTime date); | ||
| } | ||
|
|
||
| /// A date selection controller that allows only a single date to be selected. | ||
| /// | ||
| /// The selected date is always in UTC timezone and truncated to the nearest date. | ||
| final class FCalendarSingleValueController extends FCalendarController<DateTime?> { | ||
| /// Creates a [FCalendarSingleValueController] with the given initial [value]. | ||
| /// | ||
| /// ## Contract: | ||
| /// Throws an [AssertionError] if the given [value] is not in UTC timezone. | ||
| FCalendarSingleValueController([super.value]) : assert(value?.isUtc ?? true, 'value must be in UTC timezone'); | ||
|
|
||
| @override | ||
| bool contains(DateTime date) => value?.toLocalDate() == date.toLocalDate(); | ||
|
|
||
| @override | ||
| void onPress(DateTime date) { | ||
| if (value?.toLocalDate() == date.toLocalDate()) { | ||
| value = null; | ||
| } else { | ||
| value = date; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// A date selection controller that allows multiple dates to be selected. | ||
| /// | ||
| /// The selected dates are always in UTC timezone and truncated to the nearest date. | ||
| final class FCalendarMultiValueController extends FCalendarController<Set<DateTime>> { | ||
| /// Creates a [FCalendarMultiValueController] with the given initial [value]. | ||
| /// | ||
| /// ## Contract: | ||
| /// Throws an [AssertionError] if the given dates in [value] is not in UTC timezone. | ||
| FCalendarMultiValueController([super.value = const {}]) : assert(value.every((d) => d.isUtc), 'dates must be in UTC timezone'); | ||
|
|
||
| @override | ||
| bool contains(DateTime date) => value.contains(date); | ||
|
|
||
| @override | ||
| void onPress(DateTime date) { | ||
| final copy = { ...value }; | ||
| value = copy..toggle(date); | ||
| } | ||
| } | ||
|
|
||
| /// A date selection controller that allows a single range to be selected. | ||
| /// | ||
| /// Both the start and end dates of the range is inclusive. The selected dates are always in UTC timezone and truncated | ||
| /// to the nearest date. | ||
| final class FCalendarSingleRangeController extends FCalendarController<(DateTime, DateTime)?> { | ||
| /// Creates a [FCalendarSingleRangeController] with the given initial [value]. | ||
| /// | ||
| /// ## Contract: | ||
| /// Throws an [AssertionError] if the given [value] is not in UTC timezone. | ||
| FCalendarSingleRangeController([super.value]) | ||
| : assert(value == null || (value.$1.isUtc && value.$2.isUtc), 'value must be in UTC timezone'); | ||
|
|
||
| @override | ||
| bool contains(DateTime date) { | ||
| if (value case (final first, final last)) { | ||
| final current = date.toLocalDate(); | ||
| return first.toLocalDate() <= current && current <= last.toLocalDate(); | ||
| } | ||
|
|
||
| return false; | ||
| } | ||
|
|
||
| @override | ||
| void onPress(DateTime date) { | ||
| if (value == null) { | ||
| value = (date, date); | ||
| return; | ||
| } | ||
|
|
||
| final (first, last) = value!; | ||
| final pressed = date.toLocalDate(); | ||
|
|
||
| switch ((first.toLocalDate(), last.toLocalDate())) { | ||
| case (final first, final last) when pressed == first || pressed == last: | ||
| value = null; | ||
|
|
||
| case (final first, final last) when pressed < first: | ||
| value = (pressed.toNative(), last.toNative()); | ||
|
|
||
| case (final first, _): | ||
| value = (first.toNative(), pressed.toNative()); | ||
| } | ||
| } | ||
| } |