FocusTraversalPolicy constructor

const FocusTraversalPolicy({
  1. TraversalRequestFocusCallback? requestFocusCallback,
})

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

The requestFocusCallback can be used to override the default behavior of the focus requests. If requestFocusCallback is null, it defaults to FocusTraversalPolicy.defaultTraversalRequestFocusCallback.

Implementation

const FocusTraversalPolicy({
  TraversalRequestFocusCallback? requestFocusCallback
}) : requestFocusCallback = requestFocusCallback ?? defaultTraversalRequestFocusCallback;