OrdinalSortKey class Null safety
A SemanticsSortKey that sorts simply based on the double
value it is
given.
The OrdinalSortKey compares itself with other OrdinalSortKeys to sort based on the order it is given.
OrdinalSortKeys are sorted by the optional name, then by their order. If SemanticsProperties.sortKey is a OrdinalSortKey, then all the other specified sort keys in the same semantics group must also be OrdinalSortKeys.
Keys with no name are compared to other keys with no name, and will be traversed before those with a name.
The ordinal value order is typically a whole number, though it can be fractional, e.g. in order to fit between two other consecutive whole numbers. The value must be finite (it cannot be double.nan, double.infinity, or double.negativeInfinity).
- Inheritance
-
- Object
- SemanticsSortKey
- OrdinalSortKey
Constructors
- OrdinalSortKey(double order, {String? name})
-
Creates a const semantics sort key that uses a double as its key value.
const
Properties
- hashCode → int
-
The hash code for this object.
read-onlyinherited
- name → String?
-
An optional name that will group this sort key with other sort keys of the
same name.
finalinherited
- order → double
-
Determines the placement of this key in a sequence of keys that defines
the order in which this node is traversed by the platform's accessibility
services.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
Methods
-
compareTo(
SemanticsSortKey other) → int -
Compares this object to another object.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
override
-
doCompare(
covariant OrdinalSortKey other) → int -
The implementation of compareTo.
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
-
toStringShort(
) → String -
A brief description of this object, usually just the runtimeType and the
hashCode.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited