ExpandIcon class
A widget representing a rotating expand/collapse button. The icon rotates 180 degrees when pressed, then reverts the animation on a second press. The underlying icon is Icons.expand_more.
The expand icon does not include a semantic label for accessibility. In order to be accessible it should be combined with a label using MergeSemantics. This is done automatically by the ExpansionPanel widget.
See IconButton for a more general implementation of a pressable button with an icon.
See also:
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ExpandIcon
Constructors
-
ExpandIcon({Key? key, bool isExpanded = false, double size = 24.0, required ValueChanged<
bool> ? onPressed, EdgeInsetsGeometry padding = const EdgeInsets.all(8.0), Color? color, Color? disabledColor, Color? expandedColor}) -
Creates an ExpandIcon with the given padding, and a callback that is
triggered when the icon is pressed.
const
Properties
- color → Color?
-
The color of the icon.
final
- disabledColor → Color?
-
The color of the icon when it is disabled,
i.e. if onPressed is null.
final
- expandedColor → Color?
-
The color of the icon when the icon is expanded.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- isExpanded → bool
-
Whether the icon is in an expanded state.
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
-
onPressed
→ ValueChanged<
bool> ? -
The callback triggered when the icon is pressed and the state changes
between expanded and collapsed. The value passed to the current state.
final
- padding → EdgeInsetsGeometry
-
The padding around the icon. The entire padded icon will react to input
gestures.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- size → double
-
The size of the icon.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< ExpandIcon> -
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