FieldDropdown class

A dropdown button lets the user select from a number of items. The button shows the currently selected item as well as an arrow that opens a menu for selecting another item.

Each item is represented by a DropdownMenuItem widget. The type is the type of the values/keys used to identify each menu item and determine which item is currently selected. The type of the value is the type of the value associated with each menu item.

The dropdown button itself does not maintain the current value. Instead, when the user selects an item, the dropdown button calls the onChanged callback. Most widgets that use a dropdown button will listen for the onChanged callback and rebuild the dropdown button with a new value to update the currently selected item.

Constructors

FieldDropdown({String? label, String? hint, bool? enabled, required String type, required List<Map<String, dynamic>> options, dynamic initialValue, double? sequence})

const

Properties

enabled → bool?

final

hashCode → int

The hash code for this object.

no setter, inherited

hint → String?

final

initialValue → dynamic

final

label → String?

final

options → List<Map<String, dynamic>>

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

sequence → double?

final

type → String

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited