OverlayGestureLayer class

Direction-locking gesture layer for the overlay carousel morph.

Uses predictive gesture locking with a ring buffer of recent samples to determine the intended axis earlier and more accurately than simple delta comparison. Includes:

  • 6-sample prediction buffer — accumulates recent deltas for analysis.
  • 2:1 hysteresis ratio — dominant axis must exceed minor by ≥ 1.8×.
  • Velocity prediction — combines delta + velocity for axis decision.
  • Rubber-band resistance — 0.3× input at extreme progress bounds.
  • Velocity dampening — 0.85× scalar on pan-end velocity.

Axis rules:

  • CardMode: horizontal → carousel swipe, vertical up → expand, vertical down → dismiss.
  • Fullscreen / Expanding / Collapsing: vertical only (collapse).
  • Appearing: no gestures until animation completes.
Inheritance

Constructors

OverlayGestureLayer({Key? key, required OverlayMorphController controller, required double availableHeight, required double cardWidth, required Widget child})
const

Properties

availableHeight → double
final
cardWidth → double
final
child → Widget
final
controller → OverlayMorphController
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<OverlayGestureLayer>
Creates the mutable state for this widget at a given location in the tree.
override
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, int wrapWidth = 65}) → 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