DropdownButtonFormField class - material library

Constructors

DropdownButtonFormField({Key key, T value, @required List<DropdownMenuItem<T>> items, ValueChanged<T> onChanged, InputDecoration decoration: const InputDecoration(), FormFieldSetter<T> onSaved, FormFieldValidator<T> validator, Widget hint }): Creates a DropdownButton widget wrapped in an InputDecorator and FormField. [...]

onChanged → ValueChanged<T>: Called when the user selects an item.
final
autovalidate → bool: If true, this form field will validate and update its error text immediately after every change. Otherwise, you must call FormFieldState.validate to validate. If part of a Form that autovalidates, this value will be ignored.
final, inherited
builder → FormFieldBuilder<T>: Function that returns the widget representing this form field. It is passed the form field state as input, containing the current value and validation state of this field.
final, inherited
enabled → bool: Whether the form is able to receive user input. [...]
final, inherited
hashCode → int: The hash code for this object. [...]
read-only, inherited
initialValue → T: An optional value to initialize the form field to, or null otherwise.
final, inherited
key → Key: Controls how one widget replaces another widget in the tree. [...]
final, inherited
onSaved → FormFieldSetter<T>: An optional method to call with the final value when the form is saved via FormState.save.
final, inherited
runtimeType → Type: A representation of the runtime type of the object.
read-only, inherited
validator → FormFieldValidator<T>: An optional method that validates an input. Returns an error string to display if the input is invalid, or null otherwise. [...]
final, inherited

createState() → FormFieldState<T>: Creates the mutable state for this widget at a given location in the tree. [...]
override
createElement() → StatefulElement: Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
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. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent method or property is accessed. [...]
inherited
toDiagnosticsNode({String name, DiagnosticsTreeStyle style }) → DiagnosticsNode: Returns a debug representation of the object that is used by debugging tools and by toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String: Returns a string representation of this object.
inherited
toStringDeep({String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String: Returns a string representation of this node and its descendants. [...]
inherited
toStringShallow({String joiner: ', ', DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String: Returns a one-line detailed description of the object. [...]
inherited
toStringShort() → String: A short, textual description of this widget.
inherited