ExpansionTileCard class
A single-line ListTile with a trailing button that expands or collapses the tile to reveal or hide the children.
This widget is typically used with ListView to create an "expand / collapse" list entry. When used with scrolling widgets like ListView, a unique PageStorageKey must be specified to enable the ExpansionTileCard to save and restore its expanded state when it is scrolled in and out of view.
See also:
- ListTile, useful for creating expansion tile children when the expansion tile represents a sublist.
- ExpansionTile, the original widget on which this widget is based.
- The "Expand/collapse" section of material.io/guidelines/components/lists-controls.html.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ExpansionTileCard
Constructors
-
ExpansionTileCard({Key? key, Widget? leading, required Widget title, Widget? subtitle, ValueChanged<
bool> ? onExpansionChanged, List<Widget> children = const <Widget>[], Widget? trailing, BorderRadiusGeometry borderRadius = const BorderRadius.all(Radius.circular(8.0)), double elevation = 2.0, double initialElevation = 0.0, bool initiallyExpanded = false, EdgeInsetsGeometry initialPadding = EdgeInsets.zero, EdgeInsetsGeometry finalPadding = const EdgeInsets.only(bottom: 6.0), EdgeInsetsGeometry? contentPadding, Color? baseColor, Color? expandedColor, Color? expandedTextColor, Duration duration = const Duration(milliseconds: 200), Curve elevationCurve = Curves.easeOut, Curve heightFactorCurve = Curves.easeIn, Curve turnsCurve = Curves.easeIn, Curve colorCurve = Curves.easeIn, Curve paddingCurve = Curves.easeIn, bool isThreeLine = false, Color shadowColor = const Color(0xffaaaaaa), bool animateTrailing = false}) -
Creates a single-line ListTile with a trailing button that expands or collapses
the tile to reveal or hide the children. The initiallyExpanded property must
be non-null.
const
Properties
- animateTrailing → bool
-
Whether or not to animate a custom trailing widget.
final
- baseColor → Color?
-
The background color of the unexpanded tile.
final
- borderRadius → BorderRadiusGeometry
-
The radius used for the Material widget's border. Only visible once expanded.
final
-
children
→ List<
Widget> -
The widgets that are displayed when the tile expands.
final
- colorCurve → Curve
-
The animation curve used to control the header, icon, and material colors.
final
- contentPadding → EdgeInsetsGeometry?
-
The inner
contentPaddingof the ListTile widget.final - duration → Duration
-
The duration of the expand and collapse animations.
final
- elevation → double
-
The final elevation of the Material widget, once expanded.
final
- elevationCurve → Curve
-
The animation curve used to control the elevation of the expanded card.
final
- expandedColor → Color?
-
The background color of the expanded card.
final
- expandedTextColor → Color?
-
The color of the text of the expended card
final
- finalPadding → EdgeInsetsGeometry
-
The padding around the outside of the ExpansionTileCard while collapsed.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- heightFactorCurve → Curve
-
The animation curve used to control the height of the expanding/collapsing card.
final
- initialElevation → double
-
The elevation when collapsed
final
- initiallyExpanded → bool
-
Specifies if the list tile is initially expanded (true) or collapsed (false, the default).
final
- initialPadding → EdgeInsetsGeometry
-
The padding around the outside of the ExpansionTileCard while collapsed.
final
- isThreeLine → bool
-
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- leading → Widget?
-
A widget to display before the title.
final
-
onExpansionChanged
→ ValueChanged<
bool> ? -
Called when the tile expands or collapses.
final
- paddingCurve → Curve
-
The animation curve used by the expanding/collapsing padding.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- shadowColor → Color
-
The color of the cards shadow.
final
- subtitle → Widget?
-
Additional content displayed below the title.
final
- title → Widget
-
The primary content of the list item.
final
- trailing → Widget?
-
A widget to display instead of a rotating arrow icon.
final
- turnsCurve → Curve
-
The animation curve used to control the rotation of the
trailingwidget.final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → ExpansionTileCardState -
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