SelectItemDelegate class abstract

Abstract base class for building select item lists.

Provides interface for rendering select items with optional caching and change detection.

Mixed-in types

• CachedValue

Implementers

• EmptySelectItem
• SelectItemBuilder
• SelectItemList

Constructors

SelectItemDelegate()

Creates a select item delegate.

const

Properties

estimatedChildCount → int?

Estimated number of children in this delegate.

no setter

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

Methods

build(BuildContext context, int index) → Widget?

Builds a widget for the item at the given index.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

shouldRebuild(covariant SelectItemDelegate oldDelegate) → bool

Determines if the widget should rebuild when value changes.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

empty → const EmptySelectItem

An empty select item delegate constant.