SelectionRegistrar class Null safety
A registrar that keeps track of Selectables in the subtree.
A Selectable is only included in the SelectableRegion if they are registered with a SelectionRegistrar. Once a Selectable is registered, it will receive SelectionEvents in SelectionHandler.dispatchSelectionEvent.
Use SelectionContainer.maybeOf to get the immediate SelectionRegistrar in the ancestor chain above the build context.
See also:
- SelectableRegion, which provides an overview of the selection system.
- SelectionRegistrarScope, which hosts the SelectionRegistrar for the subtree.
- SelectionRegistrant, which auto registers the object with the mixin to SelectionRegistrar.
- Implementers
Constructors
Properties
- hashCode → int
-
The hash code for this object.
read-onlyinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
Methods
-
add(
Selectable selectable) → void -
Adds the
selectableinto the registrar. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
remove(
Selectable selectable) → void -
Removes the
selectablefrom the registrar. -
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited