FixedOnScrollAppbar class

A CustomAppBar widget displaying an app bar.

Only if the corresponding ScrollController property registers a scroll action, the app bar will be shown by playing its animation forward. If the scroll offset is below the threshold (scroll up), the app bar will be animated in reverse, therefore removing it from the visible area.

Inheritance
Implemented types

Constructors

FixedOnScrollAppbar({Key? key, required ScrollController? scrollController, double maxScrollOffset = 50.0, Color backgroundColor = Colors.white, List<BoxShadow> boxShadow = const [BoxShadow(color: Colors.black26, blurRadius: 12.0, offset: Offset(0, 2), spreadRadius: 1.0)], double height = CustomAppBar.height, required String title, EdgeInsets padding = const EdgeInsets.symmetric(horizontal: 8.0), Color backButtonBackgroundColor = LitBackButtonDefaultStyling.backgroundColor, Color backButtonIconColor = LitBackButtonDefaultStyling.iconColor, bool shouldNavigateBack = true, void onInvalidNavigation()?})
Creates a FixedOnScrollAppbar widget. The ScrollController is required in order to register a scroll change.
const

Properties

backButtonBackgroundColor → Color
final
backButtonIconColor → Color
final
backgroundColor → Color
The background color of the app bar. It defaults to Colors.white.
final
boxShadow → List<BoxShadow>
final
hashCode → int
The hash code for this object.
no setterinherited
height → double
The height of the app bar. It defaults to CustomAppBar.height.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
maxScrollOffset → double
The offset required to trigger the app bar to appear. It defaults to 50.0.
final
onInvalidNavigation → (void Function()?)
final
padding → EdgeInsets
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scrollController → ScrollController?
The ScrollController's scroll offset will state whether to animate the app bar.
final
shouldNavigateBack → bool
final
title → String
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _FixedOnScrollAppbarState
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