InputField<T> class

This base class must be extended by all input widgets.

This widget maintains the current state of the field, so that user input and validation failures are visually reflected in the UI.

Use a GlobalKey with InputField if you want to retrieve its current state, for example if you want one field to depend on another. ö An InputForm ancestor is not required. It simply makes it easier to enable, save, reset, or validate all input widgets at once.

See also:

  • InputForm - the widget that aggregates the fields.
  • InputText - a commonly used field for entering text.
Implementers

Constructors

InputField({Key key, bool autosave, bool autovalidate, InputDecoration decoration, bool enabled, T initialValue, Map<String, dynamic> map, ValueSetter<T> onChanged, ValueSetter<T> onSaved, String path, List<InputValidator> validators, bool wantKeepAlive = false})
Creates a single form field. [...]
const

Properties

autosave → bool
Automatically saves a changed value. If autovalidate is true then a changed value will only be saved if there is no validation failure. Also invokes method onSaved. Default is true.
final
autovalidate → bool
Automatically validates any change and updates error text accordingly. Default is false.
final
decoration → InputDecoration
Decoration for the input field supplying frame, label, error text, ...
final
enabled → bool
Whether the field accepts user input. Default is true.
final
hashCode → int
The hash code for this object. [...]
@nonVirtual, read-only, inherited
initialValue → T
The fields value will initially be set to this initialValue.
final
key → Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
map → Map<String, dynamic>
map is used together with path to provide the initial value from and to save changes to the map. This parameter supersedes parameter map given to an InputForm ancestor.
final
onChanged → ValueSetter<T>
An optional method to call on every change of the fields value.
final
onSaved → ValueSetter<T>
An optional method to call with the final value when the form is saved through InputFormState.save().
final
path → String
The path to the fields value in map. If the form is nested then path elements must be dot separated.
final
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
validators → List<InputValidator>
Methods that validate an input. The first failed validation will return an error string and no more validations will happen. [...]
final
wantKeepAlive → bool
true will keep the state of all input fields within the same Slider even when the widget is scrolled out of view.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
createState() → InputFieldState<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. [...]
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 DiagnosticsNode.toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → 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

Operators

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