CircularPanPhysics class Null safety

Calculates panned distances by assuming a circular shape.

This requires size to be set to the available area for detecting on which side of the circle a pan event occurs.

For more details on the actual implementation, you can refer to this article.

See also:

Inheritance

Constructors

CircularPanPhysics({Duration duration = PanPhysics.kDefaultDuration, Curve curve = PanPhysics.kDefaultCurve})

Properties

curve Curve
The type of curve to use for easing the animation when returning PanState.distance to zero. [...]
final
duration Duration
The animation duration used for returning a PanState.distance to zero. [...]
final
hashCode int
The hash code for this object. [...]
read-only, inherited
hasListeners bool
Whether any listeners are currently registered. [...]
@protected, read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
size Size
The size of the area to be panned. [...]
read / write, inherited
value PanState
The current value stored in this notifier. [...]
read / write, inherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes. [...]
inherited
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 and removeListener will throw after the object is disposed). [...]
@mustCallSuper, inherited
handlePanEnd(DragEndDetails details) → void
Is called when the end of a pan gesture is detected. [...]
override
handlePanStart(DragStartDetails details) → void
Is called when the start of a pan gesture is detected. [...]
override
handlePanUpdate(DragUpdateDetails details) → void
Is called when a pan gesture is updated. [...]
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
notifyListeners() → void
Call all the registered listeners. [...]
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes. [...]
inherited
toString() String
A string representation of this object. [...]
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited