ScalifySliverAppBar class

A responsive SliverAppBar that adjusts its height, title style, and flexible space based on the current screen type.

Performance Design

  • Single ScalifyProvider.of lookup per build
  • No duplicate LayoutBuilder — relies on Sliver framework constraints
  • Title font size scaled via .fz for consistency

Example

CustomScrollView(
  slivers: [
    ScalifySliverAppBar(
      title: 'My Store',
      mobileExpandedHeight: 200,
      desktopExpandedHeight: 350,
      flexibleBackground: Image.asset('assets/banner.jpg', fit: BoxFit.cover),
    ),
    ResponsiveGrid(useSliver: true, mobile: 2, desktop: 4, ...),
  ],
)
Inheritance

Constructors

ScalifySliverAppBar({Key? key, required String title, TextStyle? titleStyle, double mobileExpandedHeight = 200.0, double? tabletExpandedHeight, double? desktopExpandedHeight, Widget? flexibleBackground, bool pinned = true, bool floating = false, bool stretch = true, Widget? leading, List<Widget>? actions, Color? backgroundColor, Color? foregroundColor, double elevation = 0.0, CollapseMode collapseMode = CollapseMode.parallax})
Creates a ScalifySliverAppBar.
const

Properties

actions → List<Widget>?
Action widgets on the right side.
final
backgroundColor → Color?
Background color. If null, uses theme defaults.
final
collapseMode → CollapseMode
How the flexible space background should be placed. Default: CollapseMode.parallax.
final
desktopExpandedHeight → double?
Expanded height on desktop/large desktop. Falls back to tabletExpandedHeight.
final
elevation → double
Elevation. Default: 0.0.
final
flexibleBackground → Widget?
Background widget for the flexible space (e.g., an image).
final
floating → bool
Whether the app bar should become visible as soon as the user scrolls towards the app bar. Default: false.
final
foregroundColor → Color?
Foreground color for title/icons. If null, uses theme defaults.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
leading → Widget?
Leading widget (e.g., back button).
final
mobileExpandedHeight → double
Expanded height on mobile/watch. Default: 200.0.
final
pinned → bool
Whether the app bar should remain visible when scrolled. Default: true.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
stretch → bool
Whether the flexible space should stretch when over-scrolled. Default: true.
final
tabletExpandedHeight → double?
Expanded height on tablet. Falls back to mobileExpandedHeight.
final
title → String
The title text.
final
titleStyle → TextStyle?
Title style override. Font size is scaled via .fz if not overridden.
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