Directionality class

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

Properties

textDirection → TextDirection
The text direction for this subtree.
final
child → Widget
The widget below this widget in the tree. [...]
final, inherited
hashCode → int
The hash code for this object. [...]
read-only, inherited
key → Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
override
updateShouldNotify(covariant Directionality oldWidget) → bool
Whether the framework should notify widgets that inherit from this widget. [...]
override
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, inherited
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 toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String
Returns 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 ==(dynamic other) → bool
The equality operator. [...]
inherited

Static Methods

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