KeyedOptionsHandler<K, T> class abstract

A base interface for helping to populate drop-downs and typeaheads. There are a couple of common mixins to cut down on boilerplate:

InMemorySearchOptionsMixin If you have a list of static options and then want to apply in-memory filtering, use the AlwaysFilterSearchOptionsMixin If you always filter results, and want to force your listAllOptions to just execute a blank search

Implementers

Available Extensions

Constructors

adhocOptionBuilder → KeyedAdhocBuilder<K, T>?: no setter
canShowAll → bool: Whether or not its reasonable to display all options (or at least the first few), without any query input from the user.
no setteroverride
hashCode → int: The hash code for this object.
no setterinherited
key → String: final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

cast<KK, VV>() → IKeyedOptionsHandler<KK, VV>: inherited
castList(List input) → List<K>: Casts a list of inputs as this type
filter(String? query, List currentSelections, int limit) → FutureOr<List<T>>: Filters the list of all options based on a query - the list of current selections is also provided.
listAllOptions([int? limit]) → FutureOr<List<T>>: A list of all options.
loadValue(K key) → FutureOr<T?>: Loads a value given a key - because some options can be suggestive type-aheads, consumers should use StringOptionsHandlerExtension.resolveOption and StringOptionsHandlerExtension.resolveAllOptions
override
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toKey(T value) → K?: Produces a key, given a value
toOption(T? value) → KeyedOption<K, T>?: Converts a value T to a KeyedOption
toString() → String: A string representation of this object.
inherited
withMetaContext(IMetaFormFieldContext context) → KeyedOptionsHandler<K, T>: Creates a copy of this handler, for hte provided context. Sometimes the behavior of options will change based on the surrounding context.