SliverPersistentHeader class Null safety

A sliver whose size varies when the sliver is scrolled to the edge of the viewport opposite the sliver's GrowthDirection.

In the normal case of a CustomScrollView with no centered sliver, this sliver will vary its size when scrolled to the leading edge of the viewport.

This is the layout primitive that SliverAppBar uses for its shrinking/growing effect.

Inheritance

Constructors

SliverPersistentHeader({Key? key, required SliverPersistentHeaderDelegate delegate, bool pinned, bool floating})
Creates a sliver that varies its size when it is scrolled to the start of a viewport. [...]
const

Properties

delegate SliverPersistentHeaderDelegate
Configuration for the sliver's layout. [...]
final
floating bool
Whether the header should immediately grow again if the user reverses scroll direction. [...]
final
hashCode int
The hash code for this object. [...]
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree. [...]
final, inherited
pinned bool
Whether to stick the header to the start of the viewport once it has reached its minimum size. [...]
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

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. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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. [...]
@nonVirtual, inherited