ExpansionWidget class
A widget with a customizable title that can expands or collapses the widget to reveal or hide the content.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ExpansionWidget
Constructors
- ExpansionWidget({Key? key, required Widget titleBuilder(double animationValue, double easeInValue, bool isExpanded, dynamic toggleFunction({bool animated})), bool onExpansionWillChange(bool)?, void onExpansionChanged(bool)?, required Widget content, bool initiallyExpanded = false, bool maintainState = false, Alignment expandedAlignment = Alignment.center, void onSaveState(BuildContext context, bool isExpanded)?, bool? onRestoreState(BuildContext)?, Duration duration = const Duration(milliseconds: 200)})
-
Creates a widget with a customizable title that can expands or collapses
the widget to reveal or hide the content.
const
- ExpansionWidget.autoSaveState({Key? key, required Widget titleBuilder(double animationValue, double easeInValue, bool isExpanded, dynamic toggleFunction({bool animated})), bool onExpansionWillChange(bool)?, void onExpansionChanged(bool)?, required Widget content, bool initiallyExpanded = false, Alignment expandedAlignment = Alignment.center, Duration duration = const Duration(milliseconds: 200)})
-
const
Properties
- content → Widget
-
The widget that are displayed when the expansionWidget expands.
final
- duration → Duration
-
The length of time of animation
final
- expandedAlignment → Alignment
-
Specifies the alignment of content, which are arranged in a column when
the expansionWidget is expanded.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- initiallyExpanded → bool
-
Specifies if the expansionWidget is initially expanded (true) or collapsed (false, the default).
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- maintainState → bool
-
Specifies whether the state of the content is maintained when the expansionWidget expands and collapses.
final
- onExpansionChanged → (void Function(bool)?)
-
Called when the widget expands or collapses.
final
- onExpansionWillChange → (bool Function(bool)?)
-
Called when the widget will change expanded state.
final
- onRestoreState → (bool? Function(BuildContext)?)
-
function to restore expansion state.
Return null if there is no state to store;
in this case, initiallyExpanded will be used
final
- onSaveState → (void Function(BuildContext context, bool isExpanded)?)
-
Function to save expansion state
Called when expansion state changed
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- titleBuilder → Widget Function(double animationValue, double easeInValue, bool isExpanded, dynamic toggleFunction({bool animated}))
-
The builder of title.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → ExpansionWidgetState -
Creates the mutable state for this widget at a given location in the tree.
override
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of
DiagnosticsNodeobjects 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}) → 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