RawAutocomplete<T extends Object> class Null safety

A widget for helping the user make a selection by entering some text and choosing from among a list of options.

The user's text input is received in a field built with the fieldViewBuilder parameter. The options to be displayed are determined using optionsBuilder and rendered with optionsViewBuilder.

This is a core framework widget with very basic UI.

This example shows how to create a very basic autocomplete widget using the fieldViewBuilder and optionsViewBuilder parameters.
To create a local project with this code sample, run:
flutter create --sample=widgets.RawAutocomplete.1 mysample

The type parameter T represents the type of the options. Most commonly this is a String, as in the example above. However, it's also possible to use another type with a toString method, or a custom displayStringForOption. Options will be compared using ==, so it may be beneficial to override Object.== and Object.hashCode for custom types.

This example is similar to the previous example, but it uses a custom T data type instead of directly using String.
To create a local project with this code sample, run:
flutter create --sample=widgets.RawAutocomplete.2 mysample

This example shows the use of RawAutocomplete in a form.
To create a local project with this code sample, run:
flutter create --sample=widgets.RawAutocomplete.3 mysample

See also:

  • Autocomplete, which is a Material-styled implementation that is based on RawAutocomplete.


RawAutocomplete({Key? key, required AutocompleteOptionsViewBuilder<T> optionsViewBuilder, required AutocompleteOptionsBuilder<T> optionsBuilder, AutocompleteOptionToString<T> displayStringForOption = defaultStringForOption, AutocompleteFieldViewBuilder? fieldViewBuilder, FocusNode? focusNode, AutocompleteOnSelected<T>? onSelected, TextEditingController? textEditingController, TextEditingValue? initialValue})
Create an instance of RawAutocomplete.


displayStringForOption AutocompleteOptionToString<T>
Returns the string to display in the field when the option is selected.
fieldViewBuilder AutocompleteFieldViewBuilder?
Builds the field whose input is used to get the options.
focusNode FocusNode?
The FocusNode that is used for the text field.
hashCode int
The hash code for this object.
@nonVirtual, read-only, inherited
initialValue TextEditingValue?
The initial value to use for the text field.
key Key?
Controls how one widget replaces another widget in the tree.
final, inherited
onSelected AutocompleteOnSelected<T>?
Called when an option is selected by the user.
optionsBuilder AutocompleteOptionsBuilder<T>
A function that returns the current selectable options objects given the current TextEditingValue.
optionsViewBuilder AutocompleteOptionsViewBuilder<T>
Builds the selectable options widgets from a list of options objects.
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
textEditingController TextEditingController?
The TextEditingController that is used for the text field.


createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
createState() State<RawAutocomplete<T>>
Creates the mutable state for this widget at a given location in the tree.
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object.
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants.
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object.
toStringShort() String
A short, textual description of this widget.


operator ==(Object other) bool
The equality operator.
@nonVirtual, inherited

Static Methods

defaultStringForOption(dynamic option) String
The default way to convert an option to a string in displayStringForOption.
onFieldSubmitted<T extends Object>(GlobalKey<State<StatefulWidget>> key) → void
Calls AutocompleteFieldViewBuilder's onFieldSubmitted callback for the RawAutocomplete widget indicated by the given GlobalKey.