ButtonNavigationBar class

The ButtonNavigationBar is the menu bar, in which ButtonNavigationItem get inserted.

Mainly used instead of FloatingActionButton (FAB) in a Scaffold, but can be used in other scenarios as well. When using this as a FAB, you might want to center it using "floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat",

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatefulWidget
• ButtonNavigationBar

Constructors

ButtonNavigationBar({required List<ButtonNavigationItem> children, EdgeInsets padding = EdgeInsets.zero, double spaceBetweenItems = 1.5, BorderRadius borderRadius = const BorderRadius.all(Radius.circular(16))})

Properties

borderRadius → BorderRadius

borderRadius is used to define ounding the four edges. A few examples:

final

children → List<ButtonNavigationItem>

In children one can insert multiple ButtonNavigationItem, which will be the elements of the menu bar.

final

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

padding → EdgeInsets

padding allows to set a padding around the menu bar. Not recommended when using Widget as FAB.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

spaceBetweenItems → double

spaceBetweenItems allows customisation of gap between buttons.

final

Methods

createElement() → StatefulElement

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

inherited

createState() → _ButtonNavigationBarState

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

override

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