HoldScrollActivity class Null safety

A scroll activity that does nothing but can be released to resume normal idle behavior.

This is used while the user is touching the Scrollable but before the touch has become a Drag.

For the purposes of ScrollNotifications, this activity does not constitute scrolling, and does not prevent the user from interacting with the contents of the Scrollable (unlike when a drag has begun or there is a scroll animation underway).

Inheritance
Implemented types

Constructors

HoldScrollActivity({required ScrollActivityDelegate delegate, VoidCallback? onHoldCanceled})
Creates a scroll activity that does nothing.

Properties

delegate → ScrollActivityDelegate
The delegate that this activity will use to actuate the scroll view.
read-onlyinherited
hashCode → int
The hash code for this object.
read-onlyinherited
isScrolling → bool
Whether performing this activity constitutes scrolling.
read-onlyoverride
onHoldCanceled → VoidCallback?
Called when dispose is called.
final
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
shouldIgnorePointer → bool
Whether the scroll view should ignore pointer events while performing this activity.
read-onlyoverride
velocity → double
If applicable, the velocity at which the scroll offset is currently independently changing (i.e. without external stimuli such as a dragging gestures) in logical pixels per second for this activity.
read-onlyoverride

Methods

applyNewDimensions() → void
Called when the scroll view that is performing this activity changes its metrics.
inherited
cancel() → void
Release the Scrollable, potentially letting it go ballistic if necessary.
override
dispatchOverscrollNotification(ScrollMetrics metrics, BuildContext context, double overscroll) → void
Dispatch an OverscrollNotification with the given metrics and overscroll.
inherited
dispatchScrollEndNotification(ScrollMetrics metrics, BuildContext context) → void
Dispatch a ScrollEndNotification with the given metrics and overscroll.
inherited
dispatchScrollStartNotification(ScrollMetrics metrics, BuildContext? context) → void
Dispatch a ScrollStartNotification with the given metrics.
inherited
dispatchScrollUpdateNotification(ScrollMetrics metrics, BuildContext context, double scrollDelta) → void
Dispatch a ScrollUpdateNotification with the given metrics and scroll delta.
inherited
dispose() → void
Called when the scroll view stops performing this activity.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
resetActivity() → void
Called by the ScrollActivityDelegate when it has changed type (for example, when changing from an Android-style scroll position to an iOS-style scroll position). If this activity can differ between the two modes, then it should tell the position to restart that activity appropriately.
inherited
toString() → String
A string representation of this object.
inherited
updateDelegate(ScrollActivityDelegate value) → void
Updates the activity's link to the ScrollActivityDelegate.
inherited

Operators

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