ScrollAdapter class

Drives an Animate animation from a ScrollController.

Set direction to ScrollDirection.forward or ScrollDirection.reverse to only trigger updates when the scroll position increases or decreases respectively.

begin and end adjust the pixel range for the scroll to update the animation within. Values <0 are calculated relative to the end of the scroll. They default to minScrollExtent and maxScrollExtent respectively.

For example, this starts fading/sliding in the text once the list scrolls to 100px, and finishes 200px before the end of the scroll:

ListView(
  controller: scrollController,
  children: items,
);
Text("Hello").animate(
  adapter: ScrollAdapter(
    scrollController,
    begin: 100, // relative to start of scroll
    end: -200,  // relative to end
  )
).fadeIn().slide();

See Adapter for information on direction and animated.

Inheritance

• Object
• Adapter
• ScrollAdapter

Constructors

ScrollAdapter(ScrollController scrollController, {double? begin, double? end, bool? animated, Direction? direction})

Properties

animated → bool

final, inherited

begin → double?

final

direction → Direction?

final, inherited

end → double?

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

scrollController → ScrollController

final

Methods

attach(AnimationController controller) → void

override

config(AnimationController controller, double value, {ChangeNotifier? notifier, VoidCallback? listener}) → void

inherited

detach() → void

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

updateValue(double value) → void

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited