InViewState class
Class that stores the context's of the widgets and String id's of the widgets that are currently in-view. It notifies the listeners when the list is scrolled.
- Inheritance
-
- Object
- ChangeNotifier
- InViewState
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
- inViewWidgetIdsLength → int
-
Number of widgets that are currently in-view.
no setter
- numberOfContextStored → int
-
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
addContext(
{required BuildContext? context, required String id}) → void - Add the widget's context and an unique string id that needs to be notified.
-
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
inherited
-
dispose(
) → void -
Discards any resources used by the object. After this is called, the
object is not in a usable state and should be discarded (calls to
addListener will throw after the object is disposed).
inherited
-
inView(
String id) → bool -
Checks if the widget with the
id
is currently in-view or not. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void -
Call all the registered listeners.
inherited
-
onScroll(
ScrollNotification notification) → void - The listener that is called when the list view is scrolled.
-
removeContext(
{required BuildContext context}) → void -
removeContexts(
int letRemain) → void -
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited