InViewNotifierCustomScrollView class

builds a CustomScrollView and notifies when the widgets are on screen within a provided area.

A CustomScrollView lets you supply slivers directly to create various scrolling effects, such as lists, grids, and expanding headers. For example, to create a scroll view that contains an expanding app bar followed by a list and a grid, use a list of three slivers: SliverAppBar, SliverList, and SliverGrid.

Inheritance

Constructors

InViewNotifierCustomScrollView.new({Key? key, required List<Widget> slivers, List<String> initialInViewIds = const [], double endNotificationOffset = 0.0, VoidCallback? onListEndReached, Duration throttleDuration = const Duration(milliseconds: 200), Axis scrollDirection = Axis.vertical, required IsInViewPortCondition isInViewPortCondition, ScrollController? controller, ScrollPhysics? physics, bool reverse = false, bool? primary, bool shrinkWrap = false, Key? center, double anchor = 0.0})

Properties

child → ScrollView
The widget that should be displayed in the InViewNotifier.
finalinherited
endNotificationOffset → double
The distance from the bottom of the list where the onListEndReached should be invoked.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
initialInViewIds → List<String>
The String list of ids of the child widgets that should be initialized as inView when the list view is built for the first time.
finalinherited
isInViewPortCondition → IsInViewPortCondition
The function that defines the area within which the widgets should be notified as inView.
finalinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onListEndReached → VoidCallback?
The function that is invoked when the list scroll reaches the end or the endNotificationOffset if provided.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scrollDirection → Axis
The axis along which the scroll view scrolls.
finalinherited
throttleDuration → Duration
The duration to be used for throttling the scroll notification. Defaults to 200 milliseconds.
finalinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _InViewNotifierState
Creates the mutable state for this widget at a given location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

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

Static Methods

of(BuildContext context) → InViewState?