PRFNavBar class

Adaptive top navigation bar with back button, title and actions.

Works as a sliver (the default, for use in CustomScrollView) or as a plain PreferredSizeWidget when isSliver is false. Handset/tablet layouts differ in size and title alignment.

Example:

CustomScrollView(
  slivers: [
    PRFNavBar(
      title: 'Missions',
      onBack: () => Navigator.pop(context),
      actions: [
        IconButton(icon: const Icon(Icons.filter), onPressed: _filter),
      ],
    ),
    // ...
  ],
)

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• PRFNavBar

Constructors

PRFNavBar({required String title, Key? key, VoidCallback? onBack, List<Widget>? actions, IconData? backIcon, Color? backgroundColor, bool centerTitle = true, bool isSliver = true})

const

Properties

actions → List<Widget>?

Optional trailing action widgets.

final

backgroundColor → Color?

Overrides the nav-bar background colour.

final

backIcon → IconData?

Overrides the default back icon.

final

centerTitle → bool

When true the title is centred. Defaults to true.

final

hashCode → int

The hash code for this object.

no setter, inherited

isSliver → bool

When false the nav bar is wrapped in SafeArea and usable as an AppBar-style widget (see PRFAppBar). Defaults to true (sliver).

final

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

onBack → VoidCallback?

Invoked when the back button is pressed; defaults to maybePop.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

title → String

Title text.

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, 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

Operators

operator ==(Object other) → bool

The equality operator.

inherited