GetTransitionDelegate<T> class

A TransitionDelegate that resolves page-list changes like the framework's DefaultTransitionDelegate, except while isPopNavigation reports that the change being applied was caused by a back navigation.

A pop through GetX's router delegate (GetDelegate.back, GetDelegate.popRoute, the browser back button, ...) mutates the declarative page list. When the revealed page was already in the previous list the navigator performs a genuine removal and the default delegate correctly plays the leaving route's pop animation. But when the pop surfaces as a replacement — the incoming page was not in the previous list, which is the norm for nested GetRouterOutlet stacks that render only the current tree branch — the default delegate marks the incoming page for push (a forward animation) and completes the leaving route without any animation (#1883).

While isPopNavigation returns true this delegate instead:

  • enters new pages in place, without a forward animation (RouteTransitionRecord.markForAdd);
  • pops the top-most exiting route with its reverse transition (RouteTransitionRecord.markForPop) — unless pageless routes (dialogs, sheets) sit on top of it, mirroring the default delegate;
  • completes every other exiting route without animation; and
  • keeps the exiting routes above the entering ones in the resulting history, so the pop animation plays on top of the revealed page.

When isPopNavigation returns false the resolution is byte-for-byte the DefaultTransitionDelegate's.

Inheritance

Constructors

GetTransitionDelegate({required ValueGetter<bool> isPopNavigation})
Creates a transition delegate that applies pop semantics whenever isPopNavigation returns true at resolve time.
const

Properties

hashCode → int
The hash code for this object.
no setterinherited
isPopNavigation → ValueGetter<bool>
Whether the page-list change being resolved was caused by a back navigation. Read live from the router delegate at resolve time.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
resolve({required List<RouteTransitionRecord> newPageRouteHistory, required Map<RouteTransitionRecord?, RouteTransitionRecord> locationToExitingPageRoute, required Map<RouteTransitionRecord?, List<RouteTransitionRecord>> pageRouteToPagelessRoutes}) → Iterable<RouteTransitionRecord>
A method that will be called by the Navigator to decide how routes transition in or out of the screen when Navigator.pages is updated.
override
toString() → String
A string representation of this object.
inherited

Operators

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