Selection class Null safety

The specification of a selection.

A selection is a data query driven by Gestures. When a selection is triggered, data tuples become either selected or unselected states(At least one tuple is selected), thus may causing their aesthetic attributes change if Attr.onSelection is defined.

See also:

• SelectionUpdater, updates an aesthetic attribute value when the selection state changes.
• Attr.onSelection, where selection updates are defined.

Implementers

• IntervalSelection
• PointSelection

Constructors

Selection({Dim? dim, String? variable, Set<GestureType>? on, Set<GestureType>? clear, Set<PointerDeviceKind>? devices, int? layer})

Creates a selection.

Properties

clear ↔ Set<GestureType>?

Gesture types that will clear selections.

read / write

devices ↔ Set<PointerDeviceKind>?

The device kinds on which this selection is tiggered.

read / write

dim ↔ Dim?

Which diemsion of data values will be tested.

read / write

hashCode → int

The hash code for this object.

read-only, inherited

layer ↔ int?

The layer of the selector mark.

read / write

on ↔ Set<GestureType>?

Gesture types that trigger this selection.

read / write

runtimeType → Type

A representation of the runtime type of the object.

read-only, inherited

variable ↔ String?

If set, all tuples sharing the same this variable value with the selected tuple, will also be selected.

read / write

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a non-existent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

override