DropdownButtonHideUnderline class

An inherited widget that causes any descendant DropdownButton widgets to not include their regular underline.

This is used by DataTable to remove the underline from any DropdownButton widgets placed within material data tables, as required by the material design specification.

Inheritance

• Object
• DiagnosticableTree
• Widget
• ProxyWidget
• InheritedWidget
• DropdownButtonHideUnderline

Constructors

DropdownButtonHideUnderline({Key? key, required Widget child})

Creates a DropdownButtonHideUnderline. A non-null child must be given.

const

Properties

child → Widget

The widget below this widget in the tree.

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

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

createElement() → InheritedElement

Inflates this configuration to a concrete instance.

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, int wrapWidth = 65}) → 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

updateShouldNotify(covariant DropdownButtonHideUnderline oldWidget) → bool

Whether the framework should notify widgets that inherit from this widget.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

at(BuildContext context) → bool

Returns whether the underline of DropdownButton widgets should be hidden.