RefreshIndicatorState<T extends RefreshIndicator> class abstract

Internal Implementation of Head Indicator

you can extends RefreshIndicatorState for custom header,if you want to active complex animation effect

here is the most simple example


class RunningHeaderState extends RefreshIndicatorState<RunningHeader>
   with TickerProviderStateMixin {
 AnimationController _scaleAnimation;
 AnimationController _offsetController;
 Tween<Offset> offsetTween;

 @override
 void initState() {
   // TODO: implement initState
   _scaleAnimation = AnimationController(vsync: this);
   _offsetController = AnimationController(
       vsync: this, duration: Duration(milliseconds: 1000));
   offsetTween = Tween(end: Offset(0.6, 0.0), begin: Offset(0.0, 0.0));
   super.initState();
 }

 @override
 void onOffsetChange(double offset) {
   // TODO: implement onOffsetChange
   if (!floating) {
     _scaleAnimation.value = offset / 80.0;
   }
   super.onOffsetChange(offset);
 }

 @override
 void resetValue() {
   // TODO: implement handleModeChange
   _scaleAnimation.value = 0.0;
   _offsetController.value = 0.0;
 }

 @override
 void dispose() {
   // TODO: implement dispose
   _scaleAnimation.dispose();
   _offsetController.dispose();
   super.dispose();
 }

 @override
 Future<void> endRefresh() {
   // TODO: implement endRefresh
   return _offsetController.animateTo(1.0).whenComplete(() {});
 }

 @override
Widget buildContent(BuildContext context, RefreshStatus mode) {
   // TODO: implement buildContent
   return SlideTransition(
     child: ScaleTransition(
       child: (mode != RefreshStatus.idle || mode != RefreshStatus.canRefresh)
           ? Image.asset("images/custom_2.gif")
           : Image.asset("images/custom_1.jpg"),
       scale: _scaleAnimation,
     ),
     position: offsetTween.animate(_offsetController),
   );
 }
}

Inheritance

Object
State<T>
RefreshIndicatorState

Mixed-in types

Constructors

RefreshIndicatorState()

Properties

activity → ScrollActivity?: no setterinherited
configuration ↔ RefreshConfiguration?: getter/setter pairinherited
context → BuildContext: The location in the tree where this widget builds.
no setterinherited
floating ↔ dynamic: getter/setter pairinherited
hashCode → int: The hash code for this object.
no setterinherited
mode ↔ dynamic: getter/setter pairinherited
mounted → bool: Whether this State object is currently in a tree.
no setterinherited
refresher ↔ SmartRefresher?: getter/setter pairinherited
refresherState ↔ SmartRefresherState?: getter/setter pairinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
widget → T: The current configuration.
no setterinherited

Methods

activate() → void: Called when this object is reinserted into the tree after having been removed via deactivate.
inherited
build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget.
override
buildContent(BuildContext context, RefreshStatus mode) → Widget: inherited
deactivate() → void: Called when this object is removed from the tree.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
inherited
didChangeDependencies() → void: Called when a dependency of this State object changes.
inherited
didUpdateWidget(covariant T oldWidget) → void: Called whenever the widget configuration changes.
inherited
dispose() → void: Called when this object is removed from the tree permanently.
inherited
disposeListener() → void: inherited
endRefresh() → Future<void>: override
initState() → void: Called when this object is inserted into the tree.
inherited
needReverseAll() → bool
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
onModeChange(RefreshStatus? mode) → void: mode change callback
inherited
onOffsetChange(double offset) → void: out of edge offset callback
inherited
readyToRefresh() → Future<void>: when indicator is ready into refresh,it will call back and waiting for this function finish,then callback onRefresh
override
reassemble() → void: Called whenever the application is reassembled during debugging, for example during hot reload.
inherited
resetValue() → void: override
setState(VoidCallback fn) → void: Notify the framework that the internal state of this object has changed.
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
toStringShort() → String: A brief description of this object, usually just the runtimeType and the hashCode.
inherited
update() → void: inherited

Operators

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

RefreshIndicatorState<T extends RefreshIndicator> class abstract

Constructors

Properties

Methods

Operators

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