SBBSliverHeaderBoxLarge class

The large variant of SBBSliverHeaderBox.

This widget behaves like SBBSliverHeaderBox but uses the large header-box content layout and the themed SBBHeaderBoxThemeData.largeStyle.

The title row displays the icon besides the title and subtitle and a trailing widget. Additional body content is rendered below this area.

body can be a SBBContractible or an SBBCascadeColumn and will behave accordingly.

Provide either title for fully custom title content or titleText for a simple text title with standard styling. These parameters are mutually exclusive.

Optionally, provide either subtitle for fully custom subtitle content or subtitleText for a simple text subtitle with standard styling. These parameters are mutually exclusive.

Leading content can be supplied either as a custom widget via leading or as an icon via leadingIconData. These parameters are mutually exclusive.

Trailing content can be supplied via trailing.

When flap is provided, it is displayed below the header box as an attached extension area, appearing to be underneath the header box.

When isLoading is true, a loading indicator is displayed at the bottom of the header box.

Use semanticsLabel to provide an additional accessibility label announced by assistive technologies.

To achieve the resizing effect, this widget transitions between the minimum and maximum intrinsic heights of its subtree.

Sample code

SBBSliverHeaderBoxLarge(
  leadingIconData: SBBIcons.train_small,
  titleText: 'Journey details',
  subtitleText: 'IC 3 to Zürich HB',
  body: SBBContractible(
    child: Padding(
      padding: const EdgeInsets.only(top: SBBSpacing.small),
      child: Text('Departure: 14:32'),
    ),
  ),
)

See also:

Limitations & Considerations

This widget makes heavy use of intrinsics. This means two things:

Inheritance

Constructors

SBBSliverHeaderBoxLarge({Key? key, Widget? leading, IconData? leadingIconData, Widget? title, String? titleText, Widget? subtitle, String? subtitleText, Widget? trailing, Widget? flap, bool isLoading = false, EdgeInsetsGeometry? margin, EdgeInsetsGeometry? padding, SBBHeaderBoxStyle? style, String? semanticsLabel, Widget? top})
const

Properties

body → Widget?
A custom widget displayed as the body of the header box.
finalinherited
config → SBBSliverHeaderBoxConfig?
A configuration for the sliver-specific behavior of the header box.
finalinherited
flap → Widget?
The content to display inside the flap below the header box.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
isLoading → bool
Whether to show a loading indicator at the bottom of the header box.
finalinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
leading → Widget?
A custom widget displayed as the header box's leading content.
finalinherited
leadingIconData → IconData?
Icon data for the leading icon.
finalinherited
margin → EdgeInsetsGeometry?
The empty space that surrounds the header box.
finalinherited
padding → EdgeInsetsGeometry?
The empty space between the header box content and its outer container.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticsLabel → String?
The semantic label for the header box announced by screen readers.
finalinherited
style → SBBHeaderBoxStyle?
Customizes this header box's appearance.
finalinherited
subtitle → Widget?
A custom widget displayed as the header box's subtitle below the title.
finalinherited
subtitleText → String?
Text string to display as the header box's subtitle using standard styling.
finalinherited
title → Widget?
A custom widget displayed as the header box's title.
finalinherited
titleText → String?
Text string to display as the header box's title using standard styling.
finalinherited
top → Widget?
A widget displayed above the header box that participates in the resize motion when config.resizing is enabled.
finalinherited
trailing → Widget?
A custom widget displayed as the header box's trailing content.
finalinherited

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
inherited
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