ScrollUpdateNotification class

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 })
Creates a notification that a Scrollable widget has changed its scroll position.

Properties

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

Methods

debugFillDescription(List<String> description) → void
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
Returns a string representation of this object.
inherited
visitAncestor(Element element) bool
Applied to each ancestor of the dispatch target. [...]
inherited

Operators

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