FocusOrder class

Base class for all sort orders for OrderedTraversalPolicy traversal.

Only orders of the same type are comparable. If a set of widgets in the same FocusTraversalGroup contains orders that are not comparable with each other, it will assert, since the ordering between such keys is undefined. To avoid collisions, use a FocusTraversalGroup to group similarly ordered widgets together.

When overriding, doCompare must be overridden instead of compareTo, which calls doCompare to do the actual comparison. See also:

Implemented types
Mixed in types
Implementers
Annotations
  • @immutable

Constructors

FocusOrder()
Abstract const constructor. This constructor enables subclasses to provide const constructors so that they can be used in const expressions.
const

Properties

hashCode int
The hash code for this object. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

compareTo(FocusOrder other) int
Compares this object to another Comparable. [...]
@nonVirtual, override
doCompare(covariant FocusOrder other) int
The subclass implementation called by compareTo to compare orders. [...]
@protected
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
@mustCallSuper, @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 DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.info}) String
Returns a string representation of this object.
inherited
toStringShort() String
A brief description of this object, usually just the runtimeType and the hashCode.
inherited

Operators

operator ==(dynamic other) bool
The equality operator. [...]
inherited