Route<T> class Null safety

An abstraction for an entry managed by a Navigator.

This class defines an abstract interface between the navigator and the "routes" that are pushed on and popped off the navigator. Most routes have visual affordances, which they place in the navigators Overlay using one or more OverlayEntry objects.

See Navigator for more explanation of how to use a Route with navigation, including code examples.

See MaterialPageRoute for a route that replaces the entire screen with a platform-adaptive transition.

A route can belong to a page if the settings are a subclass of Page. A page-based route, as opposed to a pageless route, is created from Page.createRoute during Navigator.pages updates. The page associated with this route may change during the lifetime of the route. If the Navigator updates the page of this route, it calls changedInternalState to notify the route that the page has been updated.

The type argument T is the route's return type, as used by currentResult, popped, and didPop. The type void may be used if the route does not return a value.

Implementers

Constructors

Route({RouteSettings? settings})
Initialize the Route. [...]

Properties

currentResult → T?
When this route is popped (see Navigator.pop) if the result isn't specified or if it's null, this value will be used instead. [...]
read-only
hasActiveRouteBelow bool
Whether there is at least one active route underneath this route.
@protected, read-only
hashCode int
The hash code for this object. [...]
read-only, inherited
isActive bool
Whether this route is on the navigator. [...]
read-only
isCurrent bool
Whether this route is the top-most route on the navigator. [...]
read-only
isFirst bool
Whether this route is the bottom-most active route on the navigator. [...]
read-only
The navigator that the route is in, if any.
read-only
overlayEntries List<OverlayEntry>
The overlay entries of this route. [...]
read-only
popped Future<T?>
A future that completes when this route is popped off the navigator. [...]
read-only
restorationScopeId ValueListenable<String?>
The restoration scope ID to be used for the RestorationScope surrounding this route. [...]
read-only
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
settings RouteSettings
The settings for this route. [...]
read-only
willHandlePopInternally bool
Whether calling didPop would return false.
read-only

Methods

changedExternalState() → void
Called whenever the Navigator has updated in some manner that might affect routes, to indicate that the route may wish to rebuild as well. [...]
changedInternalState() → void
Called whenever the internal state of the route has changed. [...]
didAdd() → void
Called after install when the route is added to the navigator. [...]
didChangeNext(Route? nextRoute) → void
This route's next route has changed to the given new route. [...]
didChangePrevious(Route? previousRoute) → void
This route's previous route has changed to the given new route. [...]
didComplete(T? result) → void
The route was popped or is otherwise being removed somewhat gracefully. [...]
didPop(T? result) bool
A request was made to pop this route. If the route can handle it internally (e.g. because it has its own stack of internal state) then return false, otherwise return true (by returning the value of calling super.didPop). Returning false will prevent the default behavior of NavigatorState.pop. [...]
didPopNext(Route nextRoute) → void
The given route, which was above this one, has been popped off the navigator. [...]
didPush() TickerFuture
Called after install when the route is pushed onto the navigator. [...]
didReplace(Route? oldRoute) → void
Called after install when the route replaced another in the navigator. [...]
dispose() → void
Discards any resources used by the object. [...]
install() → void
Called when the route is inserted into the navigator. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toString() String
A string representation of this object. [...]
inherited
willPop() Future<RoutePopDisposition>
Returns whether calling Navigator.maybePop when this Route is current (isCurrent) should do anything. [...]

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited