AdaptiveHeightSliverPersistentHeader class

A SliverPersistentHeader that automatically adapts its height to match its child's intrinsic height.

Unlike standard SliverPersistentHeader, this widget doesn't require explicitly specifying minimum and maximum heights. Instead, it measures the height of its child and updates the header's height accordingly.

This is particularly useful for headers with dynamic content where the exact height isn't known beforehand.

Example:

AdaptiveHeightSliverPersistentHeader(
  floating: true,
  child: MyHeaderWidget(),
)
Inheritance

Constructors

AdaptiveHeightSliverPersistentHeader.new({Key? key, required Widget child, bool pinned = false, bool floating = false, bool needRepaint = false, double initialHeight = .0})
Creates an adaptive height sliver persistent header.
const

Properties

child → Widget
The widget to display as the header.
final
floating → bool
Whether the header should become visible when scrolling up even when not at the top.
final
hashCode → int
The hash code for this object.
no setterinherited
initialHeight → double
Initial height to use before the widget's actual height is calculated.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
needRepaint → bool
Whether the header should repaint on rebuild.
final
pinned → bool
Whether the header should remain visible at the start of the viewport.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<AdaptiveHeightSliverPersistentHeader>
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, 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