Directionality class Null safety

A widget that determines the ambient directionality of text and text-direction-sensitive render objects.

For example, Padding depends on the Directionality to resolve EdgeInsetsDirectional objects into absolute EdgeInsets objects.

Inheritance

Constructors

Directionality({Key? key, required TextDirection textDirection, required Widget child}): Creates a widget that determines the directionality of text and text-direction-sensitive render objects.
const

child → Widget: The widget below this widget in the tree.
finalinherited
hashCode → int: The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
read-onlyinherited
textDirection → TextDirection: The text direction for this subtree.
final

createElement() → InheritedElement: Inflates this configuration to a concrete instance.
inherited
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
override
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
updateShouldNotify(covariant Directionality oldWidget) → bool: Whether the framework should notify widgets that inherit from this widget.
override

operator ==(Object other) → bool: The equality operator.
nonVirtual">@nonVirtualinherited

maybeOf(BuildContext context) → TextDirection?: The text direction from the closest instance of this class that encloses the given context.
of(BuildContext context) → TextDirection: The text direction from the closest instance of this class that encloses the given context.