ExpandablePanel class Null safety

A configurable widget for showing user-expandable content with an optional expand button.

Inheritance

Constructors

ExpandablePanel({Key? key, Widget? header, required Widget collapsed, required Widget expanded, ExpandableController? controller, ExpandableBuilder? builder, ExpandableThemeData? theme})

Properties

builder ExpandableBuilder?
Builds an Expandable object, optional
final
collapsed Widget
The widget shown in the collapsed state
final
controller ExpandableController?
An optional controller. If not specified, a default controller will be obtained from a surrounding ExpandableNotifier. If that does not exist, the controller will be created with the initial state of initialExpanded.
final
expanded Widget
The widget shown in the expanded state
final
hashCode int
The hash code for this object.
@nonVirtual, read-only, inherited
If specified, the header is always shown, and the expandable part is shown under the header
final
key Key?
Controls how one widget replaces another widget in the tree.
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
theme ExpandableThemeData?
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.
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
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