SelectionHandler class Null safety

The abstract interface to handle SelectionEvents.

This interface is extended by Selectable and SelectionContainerDelegate and is typically not use directly.

This class returns a SelectionGeometry as its value, and is responsible to notify its listener when its selection geometry has changed as the result of receiving selection events.

Implemented types
Implementers

Constructors

SelectionHandler()

Properties

hashCode → int
The hash code for this object.
read-onlyinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
value → SelectionGeometry
The current value of the object. When the value changes, the callbacks registered with addListener will be invoked.
read-onlyinherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object notifies its listeners.
inherited
dispatchSelectionEvent(SelectionEvent event) → SelectionResult
Handles the SelectionEvent sent to this object.
getSelectedContent() → SelectedContent?
Gets the selected content in this object.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
pushHandleLayers(LayerLink? startHandle, LayerLink? endHandle) → void
Marks this handler to be responsible for pushing LeaderLayers for the selection handles.
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that the object notifies.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited