Expander class

An expandable/collapsible component.

Inheritance

Constructors

Expander({required Component header, required Component child, bool initiallyExpanded = false, void onExpansionChanged(bool expanded)?, Component? leading, bool showIcon = true, EdgeInsets? contentPadding, bool maintainState = true, Key? key})
const

Properties

child → Component
Expandable content
final
contentPadding → EdgeInsets?
Custom padding for the content
final
hashCode → int
The hash code for this object.
no setterinherited
Header content (always visible)
final
initiallyExpanded → bool
Whether initially expanded
final
key → Key?
Controls how one component replaces another component in the tree.
finalinherited
leading → Component?
Custom leading icon
final
maintainState → bool
Whether to maintain child state when collapsed
final
onExpansionChanged → void Function(bool expanded)?
Callback when expansion changes
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
showIcon → bool
Whether to show the expansion icon
final

Methods

createElement() → Element
Creates a StatefulElement to manage this component's location in the tree.
inherited
createState() → State<Expander>
Creates the mutable state for this component at a given location in the tree.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Properties

styles → List<StyleRule>
final