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}) 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