CupertinoDialogRoute<T> class Null safety

A dialog route that shows an iOS-style dialog.

It is used internally by showCupertinoDialog or can be directly pushed onto the Navigator stack to enable state restoration. See showCupertinoDialog for a state restoration app example.

This function takes a builder which typically builds a Dialog widget. Content below the dialog is dimmed with a ModalBarrier. The widget returned by the builder does not share a context with the location that showDialog is originally called from. Use a StatefulBuilder or a custom StatefulWidget if the dialog needs to update dynamically.

The context argument is used to look up CupertinoLocalizations.modalBarrierDismissLabel, which provides the modal with a localized accessibility label that will be used for the modal's barrier. However, a custom barrierLabel can be passed in as well.

The barrierDismissible argument is used to indicate whether tapping on the barrier will dismiss the dialog. It is true by default and cannot be null.

The barrierColor argument is used to specify the color of the modal barrier that darkens everything below the dialog. If null, then CupertinoDynamicColor.resolve is used to compute the modal color.

The settings argument define the settings for this route. See RouteSettings for details.

A DisplayFeature can split the screen into sub-screens. The closest one to anchorPoint is used to render the content.

If no anchorPoint is provided, then Directionality is used:

for TextDirection.ltr, anchorPoint is Offset.zero, which will cause the content to appear in the top-left sub-screen.
for TextDirection.rtl, anchorPoint is Offset(double.maxFinite, 0), which will cause the content to appear in the top-right sub-screen.

If no anchorPoint is provided, and there is no Directionality ancestor widget in the tree, then the widget asserts during build in debug mode.

Constructors

CupertinoDialogRoute({required WidgetBuilder builder, required BuildContext context, bool barrierDismissible = true, Color? barrierColor, String? barrierLabel, Duration transitionDuration = const Duration(milliseconds: 250), RouteTransitionsBuilder? transitionBuilder = _buildCupertinoDialogTransitions, RouteSettings? settings, Offset? anchorPoint}): A dialog route that shows an iOS-style dialog.

Properties

anchorPoint → Offset?: The anchor point used to pick the closest sub-screen.
finalinherited
animation → Animation<double>?: The animation that drives the route's transition and the previous route's forward transition.
read-onlyinherited
barrierColor → Color?: The color to use for the modal barrier. If this is null, the barrier will be transparent.
read-onlyinherited
barrierCurve → Curve: The curve that is used for animating the modal barrier in and out.
read-onlyinherited
barrierDismissible → bool: Whether you can dismiss this route by tapping the modal barrier.
read-onlyinherited
barrierLabel → String?: The semantic label used for a dismissible barrier.
read-onlyinherited
canPop → bool: Whether this route can be popped.
read-onlyinherited
completed → Future<T?>: This future completes only once the transition itself has finished, after the overlay entries have been removed from the navigator's overlay.
read-onlyinherited
controller → AnimationController?: The animation controller that the route uses to drive the transitions.
protected">@protectedread-onlyinherited
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-onlyinherited
debugLabel → String: A short description of this route useful for debugging.
read-onlyinherited
filter → ImageFilter?: The filter to add to the barrier.
finalinherited
finishedWhenPopped → bool: Controls whether didPop calls NavigatorState.finalizeRoute.
read-onlyinherited
hasActiveRouteBelow → bool: Whether there is at least one active route underneath this route.
protected">@protectedread-onlyinherited
hashCode → int: The hash code for this object.
read-onlyinherited
hasScopedWillPopCallback → bool: True if one or more WillPopCallback callbacks exist.
protected">@protectedread-onlyinherited
impliesAppBarDismissal → bool: Whether an AppBar in the route should automatically add a back button or close button.
read-onlyinherited
isActive → bool: Whether this route is on the navigator.
read-onlyinherited
isCurrent → bool: Whether this route is the top-most route on the navigator.
read-onlyinherited
isFirst → bool: Whether this route is the bottom-most active route on the navigator.
read-onlyinherited
maintainState → bool: Whether the route should remain in memory when it is inactive.
read-onlyinherited
navigator → NavigatorState?: The navigator that the route is in, if any.
read-onlyinherited
offstage ↔ bool: Whether this route is currently offstage.
read / writeinherited
opaque → bool: Whether the route obscures previous routes when the transition is complete.
read-onlyinherited
overlayEntries → List<OverlayEntry>: The overlay entries of this route.
read-onlyinherited
popped → Future<T?>: A future that completes when this route is popped off the navigator.
read-onlyinherited
preferRasterization → bool: Whether the route transition will prefer to animate a rasterized snapshot of the entering/exiting routes.
read-onlyinherited
restorationScopeId → ValueListenable<String?>: The restoration scope ID to be used for the RestorationScope surrounding this route.
read-onlyinherited
reverseTransitionDuration → Duration: The duration the transition going in reverse.
read-onlyinherited
runtimeType → Type: A representation of the runtime type of the object.
read-onlyinherited
secondaryAnimation → Animation<double>?: The animation for the route being pushed on top of this route. This animation lets this route coordinate with the entrance and exit transition of route pushed on top of this route.
read-onlyinherited
semanticsDismissible → bool: Whether the semantics of the modal barrier are included in the semantics tree.
read-onlyinherited
settings → RouteSettings: The settings for this route.
read-onlyinherited
subtreeContext → BuildContext?: The build context for the subtree containing the primary content of this route.
read-onlyinherited
transitionDuration → Duration: The duration the transition going forwards.
read-onlyinherited
willDisposeAnimationController ↔ bool: Whether to takeover the controller created by createAnimationController.
read / writeinherited
willHandlePopInternally → bool: Whether calling didPop would return false.
read-onlyinherited

Methods

addLocalHistoryEntry(LocalHistoryEntry entry) → void: Adds a local history entry to this route.
inherited
addScopedWillPopCallback(WillPopCallback callback) → void: Enables this route to veto attempts by the user to dismiss it.
inherited
buildPage(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation) → Widget: Override this method to build the primary content of this route.
inherited
buildTransitions(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, Widget child) → Widget: Override this method to wrap the child with one or more transition widgets that define how the route arrives on and leaves the screen.
inherited
canTransitionFrom(TransitionRoute previousRoute) → bool: Returns true if previousRoute should animate when this route is pushed on top of it or when then this route is popped off of it.
inherited
canTransitionTo(TransitionRoute nextRoute) → bool: Returns true if this route supports a transition animation that runs when nextRoute is pushed on top of it or when nextRoute is popped off of it.
inherited
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.
inherited
changedInternalState() → void: Called whenever the internal state of the route has changed.
inherited
createAnimation() → Animation<double>: Called to create the animation that exposes the current progress of the transition controlled by the animation controller created by createAnimationController().
inherited
createAnimationController() → AnimationController: Called to create the animation controller that will drive the transitions to this route from the previous one, and back to the previous route from this one.
inherited
createOverlayEntries() → Iterable<OverlayEntry>: Subclasses should override this getter to return the builders for the overlay.
inherited
didAdd() → void: Called after install when the route is added to the navigator.
inherited
didChangeNext(Route? nextRoute) → void: This route's next route has changed to the given new route.
inherited
didChangePrevious(Route? previousRoute) → void: This route's previous route has changed to the given new route.
inherited
didComplete(T? result) → void: The route was popped or is otherwise being removed somewhat gracefully.
mustCallSuper">@mustCallSuperprotected">@protectedinherited
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.
inherited
didPopNext(Route nextRoute) → void: The given route, which was above this one, has been popped off the navigator.
inherited
didPush() → TickerFuture: Called after install when the route is pushed onto the navigator.
inherited
didReplace(Route? oldRoute) → void: Called after install when the route replaced another in the navigator.
inherited
dispose() → void: Discards any resources used by the object.
inherited
install() → void: Called when the route is inserted into the navigator.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent method or property is accessed.
inherited
removeLocalHistoryEntry(LocalHistoryEntry entry) → void: Remove a local history entry from this route.
inherited
removeScopedWillPopCallback(WillPopCallback callback) → void: Remove one of the callbacks run by willPop.
inherited
setState(VoidCallback fn) → void: Schedule a call to buildTransitions.
protected">@protectedinherited
toString() → String: A string representation of this object.
inherited
willPop() → Future<RoutePopDisposition>: Returns RoutePopDisposition.doNotPop if any of callbacks added with addScopedWillPopCallback returns either false or null. If they all return true, the base Route.willPop's result will be returned. The callbacks will be called in the order they were added, and will only be called if all previous callbacks returned true.
inherited

Operators

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

CupertinoDialogRoute<T> class Null safety

Constructors

Properties

Methods

Operators

cupertino library