DropdownSuperFormField<T> class

Regular material DropdownButton wrapped in InputDecorator that extends SuperFormField

This widget's state automatically registers field for name so there is no need for manual registration.

Specify rules to add validation for this field. Errors will be displayed automatically as errorText of InputDecoration. Overriding this property will hide errors from validation.

If enabled is set to false, the field will be displayed as disabled. If non-null this property overrides the decoration's InputDecoration.enabled property.

Most fields are kept the same as in DropdownButton so see there for documentation of specific properties.

DropdownSuperFormField(
  name: "employment_status",
  items: const [
    DropdownMenuItem(value: "employed", child: Text("Employed")),
    DropdownMenuItem(value: "self-employed", child: Text("Self-employed")),
    DropdownMenuItem(value: "student", child: Text("Student")),
    DropdownMenuItem(value: "unemployed", child: Text("Unemployed")),
    DropdownMenuItem(value: "retired", child: Text("Retired")),
  ],
  rules: [RequiredRule("Cannot be empty")],
)

See also:

• DropdownButton, which is non-connected version of this widget
• DropdownButtonField, which is Flutter form version of this widget

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatefulWidget
• SuperFormField
• DropdownSuperFormField

Constructors

DropdownSuperFormField({Key? key, required String name, List<SuperFormFieldRule>? rules, required List<DropdownMenuItem<T>>? items, DropdownButtonBuilder? selectedItemBuilder, Widget? hint, Widget? disabledHint, VoidCallback? onTap, int elevation = 8, TextStyle? style, Widget? icon, Color? iconDisabledColor, Color? iconEnabledColor, double iconSize = 24.0, bool isDense = true, bool isExpanded = false, double? itemHeight, Color? focusColor, FocusNode? focusNode, bool autofocus = false, Color? dropdownColor, InputDecoration? decoration, double? menuMaxHeight, ValueChanged<T?>? onChanged, bool? enabled})

Properties

builder → SuperFormFieldBuilder

final, inherited

focusNode → FocusNode?

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

name → String

Name of the field

final, inherited

noFormFallback → Widget

Fallback widget for a case where SuperForm ancestor is unavailable

final, inherited

rules → List<SuperFormFieldRule>

Field validation rules

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

createElement() → StatefulElement

Creates a StatefulElement to manage this widget's location in the tree.

inherited

createState() → SuperFormFieldState

Creates the mutable state for this widget at a given location in the tree.

inherited

debugDescribeChildren() → List<DiagnosticsNode>

Returns a list of DiagnosticsNode objects describing this node's children.

inherited

debugFillProperties(DiagnosticPropertiesBuilder properties) → void

Add additional properties associated with the node.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent 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

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.

inherited