CategorizedDropdown<T> class

Inheritance

Constructors

CategorizedDropdown({Key? key, List<CategorizedDropdownItem<T>>? items, T? value, Widget? hint, Widget? disabledHint, ValueChanged<T?>? onChanged, VoidCallback? onTap, DropdownButtonBuilder? selectedItemBuilder, int elevation = 8, TextStyle? style, Widget? underline, Widget? icon, Color? iconDisabledColor, Color? iconEnabledColor, double iconSize = 24.0, bool isDense = false, bool isExpanded = false, double? itemHeight = kMinInteractiveDimension, Color? focusColor, FocusNode? focusNode, bool autofocus = false, Color? dropdownColor, double? menuMaxHeight, bool? enableFeedback, AlignmentGeometry alignment = AlignmentDirectional.centerStart})
const

Properties

alignment → AlignmentGeometry
Defines how the hint or the selected item is positioned within the button.
final
autofocus → bool
True if this widget will be selected as the initial focus when no other node in its scope is currently focused.
final
disabledHint → Widget?
A preferred placeholder widget that is displayed when the dropdown is disabled.
final
The background color of the dropdown.
final
elevation → int
The z-coordinate at which to place the menu when open.
final
enableFeedback → bool?
Whether detected gestures should provide acoustic and/or haptic feedback.
final
focusColor → Color?
The color for the button's Material when it has the input focus.
final
focusNode → FocusNode?
An optional focus node to use as the focus node for this widget.
final
hashCode → int
The hash code for this object.
no setterinherited
hint → Widget?
A placeholder widget that is displayed by the dropdown button.
final
icon → Widget?
The widget to use for the drop-down button's icon.
final
iconDisabledColor → Color?
The color of any Icon descendant of icon if this button is disabled, i.e. if onChanged is null.
final
iconEnabledColor → Color?
The color of any Icon descendant of icon if this button is enabled, i.e. if onChanged is defined.
final
iconSize → double
The size to use for the drop-down button's down arrow icon button.
final
isDense → bool
Reduce the button's height.
final
isExpanded → bool
Set the dropdown's inner contents to horizontally fill its parent.
final
itemHeight → double?
If null, then the menu item heights will vary according to each menu item's intrinsic height.
final
items → List<CategorizedDropdownItem<T>>?
The list of items the user can select.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
The maximum height of the menu.
final
onChanged → ValueChanged<T?>?
Called when the user selects an item.
final
onTap → VoidCallback?
Called when the dropdown button is tapped.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
selectedItemBuilder → DropdownButtonBuilder?
A builder to customize the dropdown buttons corresponding to the DropdownMenuItems in items.
final
style → TextStyle?
The text style to use for text in the dropdown button and the dropdown menu that appears when you tap the button.
final
underline → Widget?
The widget to use for drawing the drop-down button's underline.
final
value → T?
The value of the currently selected DropdownMenuItem.
final

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's 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