OnScrollBuilder class

Listen to an InjectedScrolling state.

The builder method is invoked when scrolling start, while scrolling and when scrolling ends.

 OnScrollBuilder(
   listenTo: scroll,
   builder: (scroll) {
     if (scroll.hasReachedMinExtent) {
       return Text('isTop');
     }

     if (scroll.hasReachedMaxExtent) {
       return Text('isBottom');
     }

     if (scroll.hasStartedScrollingReverse) {
       return Text('hasStartedUp');
     }
     if (scroll.hasStartedScrollingForward) {
       return Text('hasStartedDown');
     }

     if (scroll.hasStartedScrolling) {
       return Text('hasStarted');
     }

     if (scroll.isScrollingReverse) {
       return Text('isScrollingUp');
     }
     if (scroll.isScrollingForward) {
       return Text('isScrollingDown');
     }

     if (scroll.isScrolling) {
       return Text('isScrolling');
     }

     if (scroll.hasEndedScrolling) {
       return Text('hasEnded');
     }
     return Text('NAN');
   },
 ),
Inheritance

Constructors

OnScrollBuilder({Key? key, required InjectedScrolling listenTo, required Widget builder(InjectedScrolling)})
Listen to an InjectedScrolling state.

Properties

cleaners → List<VoidCallback>
finalinherited
debugPrintWhenRebuild → String?
finalinherited
didChangeDependencies → void Function(BuildContext context, ReactiveModel? model)?
finalinherited
didUpdateWidget → void Function(BuildContext context, ReactiveModel? model, MyStatefulWidget oldWidget)?
finalinherited
dispose → void Function(BuildContext context, ReactiveModel? model)?
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
initState → void Function(BuildContext context, ReactiveModel? model)?
finalinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
listenTo → InjectedScrolling
InjectedScrolling to listen to.
final
observers → List<ReactiveModelImp> Function(BuildContext context)
finalinherited
onSetState → void Function(BuildContext, SnapState, ReactiveModel)?
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
shouldRebuild → ShouldRebuild?
Whether to rebuild the widget after state notification.
finalinherited
sideEffects → SideEffects?
finalinherited

Methods

builder(BuildContext context, SnapState snap, ReactiveModel rm) → Widget
inherited
createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _MyStatefulWidgetState
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