ScrollUpdateNotification class Null safety

A notification that a Scrollable widget has changed its scroll position.

See also:

  • OverscrollNotification, which indicates that a Scrollable widget has not changed its scroll position because the change would have caused its scroll position to go outside its scroll bounds.
  • ScrollNotification, which describes the notification lifecycle.
Inheritance

Constructors

ScrollUpdateNotification({required ScrollMetrics metrics, required BuildContext context, DragUpdateDetails? dragDetails, double? scrollDelta, int? depth})
Creates a notification that a Scrollable widget has changed its scroll position.

Properties

context → BuildContext?
The build context of the widget that fired this notification.
finalinherited
depth → int
The number of viewports that this notification has bubbled through.
read-onlyinherited
dragDetails → DragUpdateDetails?
If the Scrollable changed its scroll position because of a drag, the details about that drag update.
final
hashCode → int
The hash code for this object.
read-onlyinherited
metrics → ScrollMetrics
A description of a Scrollable's contents, useful for modeling the state of its viewport.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
scrollDelta → double?
The distance by which the Scrollable was scrolled, in logical pixels.
final

Methods

debugFillDescription(List<String> description) → void
Add additional information to the given description for use by toString.
override
dispatch(BuildContext? target) → void
Start bubbling this notification at the given build context.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

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