HeaderNotifier class

Header notifier Header status and Notifications

Inheritance

• Object
• ChangeNotifier
• IndicatorNotifier
• HeaderNotifier

Constructors

HeaderNotifier({required Header header, required ValueNotifier<bool> userOffsetNotifier, required TickerProviderStateMixin<StatefulWidget> vsync, required CanProcessCallBack onCanRefresh, bool canProcessAfterNoMore = false, bool canProcessAfterFail = true, Axis? triggerAxis, FutureOr onRefresh()?, bool waitRefreshResult = true})

Properties

actualMaxOverOffset → double

no setter, inherited

actualSecondaryTriggerOffset → double

Actual secondary trigger offset. secondaryTriggerOffset + safeOffset

no setter, inherited

actualTriggerOffset → double

Actual trigger offset. triggerOffset + safeOffset

no setter, inherited

axis → Axis?

no setter, inherited

axisDirection → AxisDirection?

no setter, inherited

clamping → bool

no setter, inherited

edgeOffset → double

See IndicatorNotifier.edgeOffset.

no setter, override

frictionFactor → FrictionFactor

no setter, inherited

hapticFeedback → bool

no setter, inherited

hashCode → int

The hash code for this object.

no setter, inherited

hasListeners → bool

Whether any listeners are currently registered.

no setter, inherited

hasSecondary → bool

no setter, inherited

hitOver → bool

no setter, inherited

indicatorState → IndicatorState?

Get indicator state;

no setter, inherited

infiniteHitOver → bool

no setter, inherited

infiniteOffset → double?

no setter, inherited

iPosition → IndicatorPosition

no setter, inherited

maxOverOffset → double

no setter, inherited

mode → IndicatorMode

no setter, inherited

modeLocked → bool

Is the state locked.

no setter, inherited

noMoreLocked → bool

State lock when no more.

no setter, inherited

offset → double

no setter, inherited

outOfRange → bool

Out of scroll area.

no setter, inherited

overExtent → double

Keep the extent of the Scrollable out of bounds.

no setter, inherited

position ↔ ScrollMetrics

The current scroll position.

getter/setter pair, inherited

processedDuration → Duration

no setter, inherited

readySpringBuilder → SpringBuilder?

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

safeArea → bool

no setter, inherited

safeOffset → double

no setter, inherited

secondaryCloseTriggerOffset → double

no setter, inherited

secondaryDimension → double

no setter, inherited

secondaryLocked → bool

no setter, inherited

secondaryTriggerOffset → double?

no setter, inherited

secondaryVelocity → double

no setter, inherited

spring → SpringDescription

no setter, inherited

triggerOffset → double

no setter, inherited

userOffsetNotifier → ValueNotifier<bool>

User triggered notifier. Record user triggers and releases.

final, inherited

velocity → double

no setter, inherited

viewportDimension → double

Scrollable viewport dimension.

no setter, inherited

vsync → TickerProviderStateMixin<StatefulWidget>

Used to provide clamping animation.

final, inherited

Methods

addListener(VoidCallback listener) → void

Register a closure to be called when the object changes.

inherited

addModeChangeListener(ModeChangeListener listener) → void

Add mode change listener.

inherited

animateToOffset({required double offset, required IndicatorMode mode, bool jumpToEdge = true, Duration? duration, Curve curve = Curves.linear, ScrollController? scrollController}) → Future

Animates the position from its current value to the given value. offset The offset to scroll to. mode When duration is null and clamping is true, set the state. jumpToEdge Whether to jump to the edge before scrolling. duration See ScrollPosition.animateTo. curve See ScrollPosition.animateTo. scrollController When position is not ScrollPosition, you can use ScrollController.

override

calculateOffsetWithPixels(ScrollMetrics position, double pixels) → double

See IndicatorNotifier.calculateOffsetWithPixels.

override

callTask({required double overOffset, Duration? duration, Curve curve = Curves.linear, ScrollController? scrollController, bool force = false}) → Future

Automatically trigger task. overOffset Offset beyond the trigger offset, must be greater than 0. duration See ScrollPosition.animateTo. curve See ScrollPosition.animateTo. scrollController When position is not ScrollPosition, you can use ScrollController. force Enforce execution even if the task is in progress. But you have to handle the completion event.

inherited

createBallisticSimulation(ScrollMetrics position, double velocity) → Simulation?

See IndicatorNotifier.createBallisticSimulation.

override

dispose() → void

Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).

inherited

listenable() → ValueListenable<IndicatorNotifier>

Indicator listenable.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

notifyListeners() → void

Call all the registered listeners.

inherited

removeListener(VoidCallback listener) → void

Remove a previously registered closure from the list of closures that are notified when the object changes.

inherited

removeModeChangeListener(ModeChangeListener listener) → void

Remove mode change listener.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited