M3EFocusRing class
Draws the Material 3 Expressive keyboard focus ring around child.
When focused is true, the ring is outset around child. A transparent PhysicalModel with elevation lifts the ring above opaque siblings (e.g. dropdown / list rows) without changing layout spacing between items.
Always uses a stable Stack so toggling focused does not remount child (important for EditableText text-input clients).
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- M3EFocusRing
Constructors
- M3EFocusRing({required BorderRadius radius, required Widget child, bool focused = false, Duration animationDuration = Duration.zero, Color? color, double? width, double? gap, Key? key})
-
Creates a focus ring decorator.
const
Properties
- animationDuration → Duration
-
Optional animation for ring appearance.
final
- child → Widget
-
Content to wrap.
final
- color → Color?
-
Optional color override; defaults to M3EFocusRingTheme.resolveColor.
final
- focused → bool
-
Whether the keyboard focus ring should be painted.
final
- gap → double?
-
Optional gap override between surface and ring.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- radius → BorderRadius
-
Outer border radius of the focused surface.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- width → double?
-
Optional stroke width override.
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.
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, int wrapWidth = 65}) → 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
Static Methods
-
indicatorsEnabledOf(
BuildContext context) → bool - Whether the ambient theme allows keyboard focus ring / state chrome.
-
outsetOf(
BuildContext context) → double -
Theme outset (
gap + width) for layout clearance. -
shouldShow(
FocusNode node, [BuildContext? context]) → bool -
Whether
nodeshould show a keyboard focus ring. -
themeOf(
BuildContext context) → M3EFocusRingTheme - Theme tokens for the ambient M3ETheme.