CalendarValue class abstract

Abstract base class representing calendar selection values.

Provides a unified interface for different types of calendar selections including single dates, date ranges, and multiple date collections. Handles date lookup operations and conversion between different selection types.

Subclasses include:

• SingleCalendarValue: Represents a single selected date
• RangeCalendarValue: Represents a date range with start and end
• MultiCalendarValue: Represents multiple individual selected dates

The class provides factory constructors for easy creation and conversion methods to transform between different selection types as needed.

Example:

// Create different value types
final single = CalendarValue.single(DateTime.now());
final range = CalendarValue.range(startDate, endDate);
final multi = CalendarValue.multi([date1, date2, date3]);

// Check if a date is selected
final lookup = value.lookup(2024, 3, 15);
final isSelected = lookup != CalendarValueLookup.none;

Implementers

• MultiCalendarValue
• RangeCalendarValue
• SingleCalendarValue

Constructors

CalendarValue()

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

view → CalendarView

no setter

Methods

lookup(int year, [int? month = 1, int? day = 1]) → CalendarValueLookup

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toMulti() → MultiCalendarValue

toRange() → RangeCalendarValue

toSingle() → SingleCalendarValue

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

multi(List<DateTime> dates) → MultiCalendarValue

range(DateTime start, DateTime end) → RangeCalendarValue

single(DateTime date) → SingleCalendarValue